Resolver Systems Patents (Class 318/661)
  • Patent number: 11137268
    Abstract: An apparatus for generating a resolver excitation signal and a vehicle including the same are provided. The apparatus includes an input portion that is configured to receive an input signal and a current amplifier that is configured to generate an output signal by amplifying the input signal and that has a circuit protector that protects a circuit from an overcurrent. An output portion is configured to output the output signal. Additionally, the circuit protector includes a first transistor that has an emitter connected to the output portion, a second transistor that has a collector connected to the output portion and a base connected to a base of the first transistor and a rectifier connected to a base of the first transistor and the base of the second transistor.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: October 5, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Seonghan Kim, Hun Kong, Gun Soo Kang
  • Patent number: 10720874
    Abstract: Provided is a brushless DC motor (2) including: a stator (5) around which windings are around; a magnet rotor (6) configured to rotate by a power supply to the stator; an inverter circuit (11) connected to the stator; a position detector (7) configured to detect a positional relationship between the magnet rotor and the windings; a speed instruction unit (13) configured to output, as a speed instruction signal, a voltage corresponding to a rotation speed of the magnet rotor; a duty determination unit (12) configured to determine a duty of a voltage applied to the stator, based on the speed instruction signal; a drive controller (14) configured to distribute and output a duty signal based on the positional relationship and the duty; and temperature-sensitive resistance elements (15) configured to, by increasing the resistance in response to a temperature rise, reduce the voltage given as the speed instruction signal.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: July 21, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Takayuki Tahara
  • Patent number: 10634516
    Abstract: A rotation detecting device is configured to be used with a switch and detect rotation of a rotation shaft having a magnetic body attached thereto. The rotation detecting device includes a magneto-resistive element facing the magnetic body and outputting a first signal related to displacement of the magnetic body, a Hall element facing the magnetic body and outputting a second signal related to displacement of the magnetic body, and a detection circuit having the first and second signals input thereto. The detection circuit is configured to: output the first signal while the switch is turned on; detect rotation-number information corresponding to the number of rotations of the rotation shaft based on the second signal at a first time point at which the switch is turned off; store the rotation-number information; and output the stored rotation-number information at a second time point when the switch is turned on after the first time point.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 28, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hideaki Fujiura, Takeshi Uemura, Ryo Osabe, Takuya Tomida
  • Patent number: 10569427
    Abstract: A servo transmission mechanism includes a servo main body, a first housing, a second housing, a connecting rod, and a linking member. The semi main body includes a first end having an output shaft and a second opposite end. The first housing is connected to the output shaft of the servo main body. The connecting rod has an upper end and a lower end that includes a connecting shaft, opposite ends of which are rotatably connected to the first housing and the second housing, respectively. The linking member rotatably connects the upper end of the connecting rod to the second end of the servo main body.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: February 25, 2020
    Assignee: UBTECH ROBOTICS CORP.
    Inventors: Youjun Xiong, Xiaopeng Wu, Meichun Liu
  • Patent number: 10533814
    Abstract: A method for monitoring that includes the steps of: associating a monitoring module with a heat exchanger unit; operating the monitoring module whereby a microcontroller performs various tasks, and ultimately providing an indication; and taking an action based on the indication. The monitoring module includes an at least one sensor proximate to the cooling side. The module also includes a logic circuit having a microcontroller in operable communication with the at least one sensor.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: January 14, 2020
    Assignee: FORUM US, INC.
    Inventors: Randy Vanberg, Hamid Reza Zareie Rajani, Seyed Reza Larimi, Morteza Abbasi
  • Patent number: 10495684
    Abstract: A method for detecting an open resolver exciter line (10) comprises the following steps: —measuring the signal voltages Us and Uc of the sine coil (17) and the cosine coil (18) of the resolver (15); —comparing the amplitude Us2+Uc2 of the resolver signal to a first threshold value CS1; —starting a diagnostic mode having the following steps if the amplitude Us2+Uc2 does not reach the first threshold value CS1; —applying a constant voltage to the exciter line (11, 12) via a series resistance (25) RLE that is large compared to the ohmic resistance of the exciter coil (16) RE; —measuring the voltage difference UE(t1) at the terminals (5, 6) of the exciter line at a number of points in time ti during at least one excitation period; and —determining the DC voltage component UE,Offs of the voltage difference UE; —determining that there is an open exciter line (10) if, during the excitation period, the DC voltage component UE,Offs is larger than a second threshold value CS2.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: December 3, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Benjamin Lechner, Daniel Raichle, Daniel Zirkel, Michael Ungermann
  • Patent number: 10326352
    Abstract: Systems and methods for controlling a DC to AC inverter providing a multiphase output at a fundamental frequency are provided. More particularly, a synchronous reference frame control scheme can be employed to regulate a DC to AC inverter to attenuate error at various frequencies of interest for the DC to AC inverter. According to particular example aspects of the present disclosure, the synchronous reference frame control scheme can include control structures to provide for attenuation of the negative sequence and zero sequence currents, leading to reduced total harmonic distortion and voltage unbalance in the output voltage of the inverter.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 18, 2019
    Assignee: GE Aviation Systems LLC
    Inventor: Slobodan Gataric
  • Patent number: 10018654
    Abstract: In one embodiment, a sensor circuit may include a first receiver circuit that may be configured to receive a first signal that is representative of a first mutual inductance and form a first detection signal that is representative of the first mutual inductance, wherein the first variable mutual inductance varies in response to a position of a metal object. An embodiment may include a second receiver circuit configured to receive a second signal that is representative of a second mutual inductance and form a second detection signal that is representative of the second mutual inductance, wherein the second mutual inductance varies in response to the position of the metal object. In an embodiment, the sensor circuit may include a recognition circuit configured to assert a movement detected signal responsively to a first value of the first detection signal, configured to assert a movement direction signal responsively to a first value of the second detection signal.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: July 10, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Jacques Bertin
  • Patent number: 9960784
    Abstract: A sinusoidal-amplitude-to-digital-output circuit includes a comparator with an input terminal, a reference terminal and an output terminal. A digital bus is connected to the output terminal. A reference voltage source is connected to the reference terminal. A feedback resistor is connected in parallel with the comparator between the output terminal and the input terminal to provide hysteresis for noise rejection such that circuit converts voltage received at the input terminal into a digital pulse-width modulated waveform that varies non-linearly with amplitude of the voltage received at the input terminal.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: May 1, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Michael A. Wilson, Harold J. Reyes
  • Patent number: 9797749
    Abstract: A resolver has a lead wire that can be slack even in a structure in which it is impossible to maintain the distance between an end of wound wire and a terminal pin without using a special jig. A lead wire of a stator coil 500 is entwined on a plurality of terminal pins 603 in a slack condition, and the entwined parts are fixed by soldering or welding. Terminal base 600 is then moved to a stator core 200 side, and the lead wire is made slack by contacting the lower surface of a terminal base body 601 to the upper surface of the stator core 200. Next, end part of the pins 306 of a primary insulator 300 are melted so as to fix the terminal base 600.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: October 24, 2017
    Assignee: MINEBEA CO., LTD.
    Inventor: Kazuki Miyao
  • Patent number: 9562790
    Abstract: A sensor device analogical output signal shifting system including the sensor device including at least two detection cells adapted to equip a mechanical device and deliver at least two analogical output signals depending on behavior of the mechanical device. A shifter circuit selectively processes the analogical output signals and including at least a first part including at least one passive analogical component having a variable parameter and a second part including at least one passive analogical component having a variable parameter; and a control component for controlling the variable parameters of the passive analogical components, a variation of these variable parameters shifting at least one of the sensor device analogical output signals in the circuit. The circuit delivers at least two sensor device analogical output signals, including at least one shifted output signal including the first shifted analogical output signal and/or the second shifted sinusoidal signal of the sensor device.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: February 7, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Mathieu Hubert, Suzanne Blokland
  • Patent number: 9541372
    Abstract: The invention relates to an inductive angle sensor that includes a measuring element able to be positioned, within an angle measurement range, in different angle-positions about a rotational axis, as well as a coil that is at a distance from said measuring element. The surface of the measuring element is at a different distance from the coil in each angle-position, within said angle measurement range.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: January 10, 2017
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Hilmar Müller, Sören Lehmann
  • Patent number: 9225271
    Abstract: A motor driving apparatus according to an embodiment includes a brushless motor. The motor driving apparatus includes a position sensor that outputs a position detection signal in synchronization with a phase of an induced voltage of a coil of the brushless motor. The motor driving apparatus includes a semiconductor integrated circuit that controls driving of the brushless motor by supplying a pseudo sine-wave driving voltage from an energization terminal to the coil of the brushless motor based on the position detection signal and a command signal that prescribes driving of the brushless motor.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: December 29, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoki Oomura, Kazunobu Nagai, Toshimitsu Aizawa, Sadao Ikeda, Jun Sodesawa, Hiroyuki Ishida
  • Patent number: 9199382
    Abstract: An industrial robot with a manipulator arm including at least one manipulator element and an electric motor driving the at least one manipulator element. An energy reservoir supplies the electric motor with electricity when a power failure or power loss occurs to move the manipulator element from a working position to a safe parking position. Also a method of parking a manipulator arm of an industrial robot.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: December 1, 2015
    Assignee: ABB RESEARCH LTD.
    Inventors: Ivan Lundberg, Roger Mellander, Hector Zelaya De La Parra, Mats Källman
  • Patent number: 9098443
    Abstract: Phase information of a rotation system is obtained by a) reading the present output value Sk, (k=0, . . . , N?1) of the sensor at a sequence of N points of time during a first period of a periodic modulation function (PHA,PHB,PHC, PHD), b) storing read output values Sk or a value derived from this output value at least temporarily in a memory, c) extracting information on the phase of the rotating system, wherein said information is extracted based on evaluation of a function of the type, wherein=and, and d) sampling and storing sequentially further output values Sk, k=N,N+1, . . . of the sensor at corresponding points of time in the following periods of the periodic modulation function (PHA,PHB,PHC, PHD). Each reading information on the phase of the rotating system based on the function is extracted and a controller device (100) for application of this technique.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: August 4, 2015
    Assignee: SICK STEGMANN GMBH
    Inventor: Massimo Francescon
  • Patent number: 9075401
    Abstract: A method of correcting a sensor that detects a detection object and generates a detection signal includes: determining a homing-signal generation time difference between points of time when the detection signal is generated according to a direction in which the detection object enters the sensor and correcting a homing-signal generation time by using the determined homing-signal generation time difference.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: July 7, 2015
    Assignee: SAMSUNG TECHWIN CO., LTD.
    Inventor: Jin-Seong Lee
  • Patent number: 9013132
    Abstract: Two excitation coils (excitation A coil, excitation B coil) and two detection coils (detection A coil, detection B coil) are provided. The excitation A coil and the excitation B coil are excited at frequencies that are different from each other. The number of turns of the detection A coil and the detection B coil are respectively set with two sine waves using the number ms1 and ms2 of pole pairs. The number ms1 and ms2 of pole pairs, the number mx1 and mx2 of pole pairs of the excitation A coil and the excitation B coil, and the number mr of pole pairs of a rotor are set to have a predetermined relationship. A resolver having redundancy can be realized with small number of coils.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: April 21, 2015
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventor: Kenichi Nakazato
  • Patent number: 9007010
    Abstract: Provided is a system and method for calibrating an offset of a resolver in a motor of a vehicle. More specifically, a current is applied to the ?d-axis of the motor, the Vq, Vd, Iq, and Id of the motor is measured and a power input to the motor is calculated by a controller, and when the input power is not within a predetermined range, the controller adjusts the offset of the resolver to a positive or negative value accordingly.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: April 14, 2015
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Soon Woo Kwon, Joon Yong Lee
  • Patent number: 8933655
    Abstract: An apparatus for measuring an error in a resolver includes a first calculator that perform an inverse Park transform based on voltages Uq and Ud at an output of PI current regulators, and delivers voltage setpoint signals PWMA, PWMB, PWMC to a power stage via a line on which a DC voltage Ubus-dc is available. The power stage generates a three-phase system of voltages UA, UB, UC for energizing an electric machine. The apparatus also includes a signal processor that provides an angle measurement ?m. Based on currents MesIA, MesIB, MesIC of the three phases, and on a rotor angle ?r, a second calculator of the device delivers values MesId, MesIq used by the first calculator. A PI voltage regulator delivers an angle ?c for correcting the error by regulating a setpoint value for the voltage Ud.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: January 13, 2015
    Assignees: Compagnie Generale des Establissements Michelin, Michelin Recherche et Technique S.A.
    Inventors: Cédric Savio, Jean-Louis Linda, Bertrand Vedy
  • Patent number: 8928310
    Abstract: The present invention relates to a reluctance resolver (100) with an at least partially soft magnetic stator (104) and an at least partially soft magnetic rotor (102) which oppose each other by forming an air gap. The magnetic resistance in the air gap changes periodically on account of a configuration of the rotor that varies over the circumference. The angle sensor has a magnetic flux transmitter which is arranged on the stator and generates a predefined magnetic flux distribution in the air gap via at least one pair of poles. Furthermore, a magnetic flux receiver, which measures the intensity of the magnetic field via at least two pairs of signal poles arranged offset from one another at an angle, is arranged on the stator, wherein an angle value for a position of the rotor in relation to the stator can be derived from the two receiver signals.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: January 6, 2015
    Assignee: Tyco Electronics Belgium EC BVBA
    Inventors: Tom Ocket, Jan Van Cauwenberge, Jurgen Verstraete
  • Patent number: 8825440
    Abstract: A resolver signal converter and a resolver signal conversion method amplify and perform analogue-digital conversion on a sine wave output from a resolver; thereafter, among frequency components of the sine wave output, pass and thereby extract a predetermined bandwidth of which the center frequency is the frequency of an excitation signal, by means of a band-pass filter; sample the sine wave output while synchronizing the sine wave output with a reference signal which is based on the excitation signal; and generate a detection angle signal sine value from the sampled signal. Similarly, a detection angle signal cosine value is generated from a cosine wave output from the resolver. A detection angle is calculated based on the detection angle signal sine value and the detection angle signal cosine value.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: September 2, 2014
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Masahiro Yamada
  • Patent number: 8773054
    Abstract: The present invention is directed to a method of estimating a motor rotation angle that does not affect precision of a detected angle of a crank angle sensor, which is an alternative sensor, when abnormality occurs in a resolver and a peripheral circuit, and performing a motor control without failure of an inverter or peripheral device. A vehicle system includes a motor, a resolver detecting a rotor rotation angle of the motor, a motor control circuit controlling the motor based on information on rotor rotation angle and torque command value, an engine connected to the motor through a crankshaft, and a crankshaft sensor detecting revolutions of the crankshaft, in which the motor control circuit estimates rotor rotation angle based on a variation rate of the number of revolutions of the crankshaft when abnormality of the resolver is detected, and performs a weak field control based on estimated rotor rotation angle.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: July 8, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kosei Goto, Yukihiko Oishi
  • Patent number: 8742715
    Abstract: A sensor system for providing control of an electric motor having an inductive angle sensor system including a first inductive coil configured for affixation to a rotor shaft of the electric motor wherein rotation of the rotor shaft causes corresponding rotation of the first inductive coil. A second inductive coil fixedly mounted in spaced relationship to the first inductive coil. An evaluation circuit coupled to the second inductive coil and to the electric motor operative to determine a rotor shaft angle for the rotor shaft of the electric motor through evaluation of an induced magnetic field between the first and second inductive coils.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: June 3, 2014
    Assignee: Simmonds Precision Products, Inc.
    Inventors: Michael Jules Ortman, William L. Kenly, V
  • Patent number: 8674632
    Abstract: A motor control device determines a rotation angle and an angular speed of a motor, and has: a correcting unit including N number (N is an positive integer equal to or more than 2) of bit-shift circuits, which divide the angular speed by powers of 2 by bit shift, and a circuit, which subtracts output values of the second to Nth bit-shift circuits from an output value of the first bit-shift circuit to determine a correction amount for the rotation angle and correct the rotation angle by the correction amount; so as to determine two-phase direct voltages to obtain a target torque from the three-phase alternate currents passing through the motor according to the angular speed, and convert the two-phase direct voltages into the three-phase alternate voltages according to the sine, cosine of the corrected rotation angle.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: March 18, 2014
    Assignee: Spansion LLP
    Inventors: Youji Kawano, Masato Uwatoko, Motoki Shimozono, Kazuhiro Konomoto, Hiroshi Haibara, Koji Mizumoto
  • Patent number: 8669734
    Abstract: A control device divides 360° corresponding to one cycle of a resolver angle into N zones, and determines whether or not a resolver angle ? in the current cycle exceeds a division border. When determined that resolver angle ? in the current cycle exceeds a division border, the control device calculates a time difference ?T[n] between a calculation time T[n] in the immediately preceding resolver cycle and a calculation time T in the current cycle. The control device also calculates a resolver angle variation ??[n] with time difference ?T[n] by adding 360° to the difference between resolver angle ? obtained in the current cycle and a resolver angle ?[n] obtained in the immediately preceding resolver cycle. The control device then calculates a rotation speed NM by multiplying, by a coefficient K, a value obtained by dividing ??[n] by ?T[n].
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: March 11, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Kenji Yamada, Yasuhiro Nakai, Satoru Katoh, Yoshihiro Shamoto, Takaya Soma
  • Patent number: 8633667
    Abstract: A motor speed determining circuit determining a rotation speed of a motor is provided and a processing of generating motor driving waveform is switched in accordance with the rotation speed of the motor. A resolver signal outputted from a resolver 2 is converted to a digital value by an R/D converter 3, and inputted to a computing circuit of resolver value correction 5 via an R/D conversion interface 4. A current value of a motor M is converted to a digital value by an A/D convertor 8. The computing circuit of resolver value correction 5 computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The computing circuit of motor control computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter 8 and a motor current instruction value etc.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: January 21, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Hisaaki Watanabe
  • Patent number: 8508171
    Abstract: A position control apparatus calculates a position detection value by adding an output of a first-order delay circuit 17 that receives a difference between a driven member position detection value Pl and a motor position detection value Pm to the motor position detection value Pm, and uses the obtained position detection value as a position feedback value. An aging corrector 30 suppresses low frequency vibrations by controlling a time constant Tp of the first-order delay circuit 17 in such a way as to increase the time constant when a vibratory state of the driven member is detected.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: August 13, 2013
    Assignee: OKUMA Corporation
    Inventor: Masashi Miyaji
  • Patent number: 8400087
    Abstract: A method and an arrangement for determining the rotation speed of a motor fed by an inverter, the arrangement comprising means for determining the rotation speed of the motor in at least two alternative manners, whereby the means for determining the rotation speed of the motor comprise one of the at least two alternative manners of performance: means for measuring the frequency of the voltage fed to the motor by the inverter; and means for estimating the rotation speed of the motor on the basis of the measured frequency.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: March 19, 2013
    Assignee: ABB Oy
    Inventors: Reijo Virtanen, Osmo Pasuri
  • Patent number: 8354815
    Abstract: An encoder includes: a main scale having two or more band-shaped tracks in each of which an optical main grating is formed so that longitudinal direction of the main scale corresponds to a measurement axis direction; and an index scale opposed to the main scale so as to form a diffraction interference optical system in cooperation with the main grating, disposed so as to be movable relative to the main scale in the measurement axis direction, and in which two or more optical index gratings are formed. A plurality of slits included in the main grating in at least one track are formed so as to be inclined at a predetermined inclination angle from a direction perpendicular to the measurement axis direction so that pitch of the slits in the track becomes equal to the pitch of the slits in the at least one other track.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: January 15, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yasushi Yoshida, Yuji Arinaga, Shirou Yoshidomi, Yosuke Yamaguchi, Jiro Muraoka
  • Patent number: 8339076
    Abstract: An electric motor drive control apparatus includes a detection angle obtaining section that obtains the detection angle of the resolver; a correction information storage section that stores correction information for correcting the detection angle, in association with a modulation ratio that is a ratio of an effective value of a fundamental wave component of the AC voltage to the system voltage; and a detection angle correcting section that obtains the correction information from the correction information storage section, based on the modulation ratio at the time the detection angle obtaining section obtains the detection.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: December 25, 2012
    Assignee: Aisin AW Co., Ltd.
    Inventors: Takeshi Aoki, Subrata Saha
  • Patent number: 8305015
    Abstract: A system for controlling the feed of a yarn to a textile machine or a metal wire to a coil winder. The yarn or wire unwinds from its spool and cooperates with a rotary member associated with its own rotation actuator before being directed to the machine. The yarn or wire has a characteristic value of tension and/or speed and/or quantity during this feed, and the actuator has a stator and a rotor acting on an exit drive shaft, which has its own piloting arrangement. The rotary member about which the yarn or wire winds is keyed onto the exit drive shaft. This control system measures the angular position of the drive shaft and compares an instantaneous parameter of that angular position to a prefixed characteristic value of the yarn or wire Command signals are then fed to the actuator's piloting arrangement to conform the instantaneous parameter with this prefixed value.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: November 6, 2012
    Assignee: B.T.S.R. International S.p.A.
    Inventors: Tiziano Barea, Massimo Tomazzolli
  • Patent number: 8288976
    Abstract: An electronic control system for a motor uses a test cycle to select an optimum mode of operation from a plurality of available modes of operation. In some embodiments, the test cycle produces test data that is compared to information in a library of operating parameters relating to the available modes of operation. An algorithm uses the information in the library of operating parameters to choose an optimum mode of operation. In certain embodiments, the test cycle tries each of the available modes of operation, monitors operational parameters, and determines the best performing mode of operation.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: October 16, 2012
    Assignee: SNTech, Inc.
    Inventors: Young-Chun Jeung, Thomas Earl Cain
  • Patent number: 8269445
    Abstract: Methods and apparatus are provided for a limp home operational mode for an electric motor system. The method includes determining whether a resolver has failed. When the resolver has not failed, operation of the electric motor system uses resolver signals. When the resolver fails, operation of the electric motor system uses sensorless rotor position and rotor speed signals.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: September 18, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Nitinkumar R. Patel, Peter J. Savagian, Yo Chan Son, Rostam Dehmoobed Nasrabadi
  • Patent number: 8198841
    Abstract: A method of processing a resolver fault in a motor generator unit (MGU) includes receiving a position signal from a resolver describing a measured angular position of a rotor of the MGU, determining the presence of the resolver fault using the position signal, and calculating or extrapolating an estimated rotor position when the resolver fault is determined. A predetermined resolver fault state may be determined using a measured duration of the resolver fault, and the MGU may be controlled using the estimated rotor position for at least a portion of the duration of the resolver fault. A motor control circuit is operable for processing the resolver fault using the above method, and may automatically vary a torque output or a pulse-width modulation (PWM) of the MGU depending on the duration of the resolver fault.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: June 12, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Wei D. Wang, Bon Ho Bae, Stephen T. West, Rick H. Schroeder
  • Patent number: 8179079
    Abstract: The rotation angle detection device detects the rotation angle of a rotary member by employing, at the least, either a sine wave signal or a cosine wave signal that is generated as the rotary member is rotated, and employs a change per unit time in the sine wave signal or cosine wave signal to determine whether an output abnormality has occurred in the rotation angle detection device. Further, this rotation angle device is employed to detect the motor angle of an electric power steering apparatus.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: May 15, 2012
    Assignee: Honda Motor Co., Ltd
    Inventors: Yoshinobu Mukai, Hiroaki Horii, Fumihiro Morishita
  • Patent number: 8159173
    Abstract: A control device for a travel motor mounted to a vehicle has a resolver which works as a rotation-angle sensor. The control device has a RDC which calculates a rotation-angle output value ? based on rotation detection signals Sa, Sb transferred from the resolver. The control device supplies electric power to the travel motor based on the rotation angle output value ?. The RDC calculates “sin(???)” as an error deviation ? based on the signals Sa and Sb and the rotation-angle output value ?. The RDC calculates an angular acceleration by multiplying the error deviation ? with a gain (=Ka·Kb), and integrates the angular acceleration two times in order to obtain a next rotation-angle output value. A gain control part of the RDC decreases the gain when the judgment means judges that the travel motor rotates at a constant rotation speed.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: April 17, 2012
    Assignee: Denso Corporation
    Inventors: Shigenori Mori, Eiichiro Kawakami
  • Patent number: 8106618
    Abstract: In a method and apparatus for calibrating a position sensor mounted on the shaft of a permanent magnet synchronous motor, to control the position of a rotor of the permanent magnet synchronous motor relative to a magnetic field produced by a stator of the permanent magnet synchronous motor, a DC test current is supplied to stator windings of the permanent magnet synchronous motor to generate a definite magnetic field. The motor speed caused by the DC test current is adjusted to zero by modifying the rotor position; and the position measured by the position sensor at zero motor speed relative to the magnetic field is used to calibrate the position sensor.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: January 31, 2012
    Assignee: Daimler AG
    Inventors: Radomir Fabis, Marcus Heller
  • Patent number: 7999496
    Abstract: A control system and method to determine position of a rotor relative to a stator for a synchronous multipole electrical machine is presented, including one for application on a fuel/electric hybrid powertrain for a vehicle. The machine includes a stator, a rotor, and a rotor position sensing mechanism. The control system controls the electrical machine, in conjunction with an electrical storage device and an inverter, using algorithms and calibrations which derive a rotor position based upon a sensorless position sensing technique, and determine an offset from a sensed rotor position. Electrical output from the inverter to the machine is controlled based the offset, which is stored non-volatile memory. A rotor position is derived based upon a sensorless position sensing technique during initial machine operation after startup of the machine, and includes operation in a torque-generative mode and in an electrical energy-generative mode.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: August 16, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Sean E Gleason, Steven E. Schulz, Patrick M. Prihoda
  • Patent number: 7973504
    Abstract: A method for improving a failure mode diagnostic of an electric power steering system by overcoming a motor electric lock condition due to position sensor signal corruption or other motor faults. If certain conditions are met, the method determines that the motor is in an electric lock condition, and then reduces a torque current command to the motor so that it is able to be rotated by a vehicle hand-wheel. Once the motor is able to be rotated, then the method determines whether certain conditions have been met to determine whether the position sensor is malfunctioning.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: July 5, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Chandra S. Namuduri, Scott R. Kloess, Suresh Gopalakrishnan, Yat-Chung Tang
  • Patent number: 7915888
    Abstract: Methods and systems for detecting an angular position of an electric motor are disclosed, including sending an electrical pulse through a stator coil of the electric motor, determining an approximate angular position of a rotor of the electric motor in response to detecting an timing of a returning electrical pulse from the stator coil, the timing of the returning electrical pulse being indicative of the angular position of the rotor; and determining an accurate position of the rotor in response to sensing a transition of a digital sensor in response to the rotor rotating relative to the stator, the transition being indicative of the accurate position.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: March 29, 2011
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Patrick A. O'Gorman, Rene Vivanco, Alex Kurnia
  • Patent number: 7878795
    Abstract: A fuel burner controller and associated method is configured to establish fuel combustion in a fuel burner and to recycle a fuel combustion initiation process when a loss of combustion is detected and a call for heat is asserted. The controller is further configured to limit a number of recycles of the fuel combustion initiation process based on a time budget.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: February 1, 2011
    Assignee: R.W. Beckett Corporation
    Inventor: John E. Bohan, Jr.
  • Patent number: 7863850
    Abstract: An apparatus, system, and method are provided for simulating outputs of a resolver. One apparatus includes an adjustable sine waveform generator for simulating first and second sine wave signals, and an adjustable cosine waveform generator for simulating first and cosine wave signals. The apparatus also includes an adjustable waveform generator and an adjustable gain circuit coupled to the sine waveform generator and cosine waveform generator. The system includes a device simulating a resolver coupled to a motor controller. The device includes an adjustable sine waveform generator and an adjustable cosine waveform generator coupled to an adjustable waveform generator and an adjustable gain circuit. One method includes transmitting a signal simulating at least one resolver fault condition to a motor controller to determine if the motor controller detects the fault condition(s).
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: January 4, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: David T Fu, Wei D. Wang, Steven E. Schulz
  • Patent number: 7859215
    Abstract: A motor controller includes a reference signal generator; an A/D converter performing A/D conversion of the cosine and the sine signals outputted from a resolver; a first amplitude calculator calculating cosine and sine signal amplitudes based on twice-A/D converted cosine and sine signals respectively; a second amplitude calculator calculating averages of the cosine and the sine signals, and that calculates the amplitude of the cosine signal from a difference between the cosine signal average and a latest A/D converted cosine signal, and that calculates the amplitude of the sine signal from a difference between the sine signal average and a latest A/D converted sine signal; a synthesizer synthesizing the cosine and sine signal amplitudes obtained by the first and the second amplitude calculators respectively; a rotational angle calculator calculating a rotational angle based on the synthesized cosine and sine signal amplitudes; and a PWM controller.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: December 28, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazunobu Nagai, Sari Maekawa
  • Patent number: 7834576
    Abstract: Apparatus and methods are provided for diagnosing faults in multiple, associated motor-resolver systems. One apparatus includes a swapping circuit coupling a first resolver to a first or second decoder, and a swapping circuit coupling a second resolver to the first or second decoder. One method includes applying a signal from a resolver to a first decoder to determine that the first decoder is malfunctioning if the first decoder continues to generate a fault signal, and applying a signal from a different resolver to a second decoder to determine that a motor associated with the first decoder is malfunctioning if the second decoder generates a fault signal. Another method includes transmitting a signal from a resolver to first and second decoders, transmitting a signal from a different resolver to the first and second decoders, and determining if the first decoder, second decoder, a first motor, or a second motor is malfunctioning.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: November 16, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: David T Fu, Wei D. Wang
  • Patent number: 7692566
    Abstract: A resolver includes an excitation signal generator which generates a sine wave and a cosine wave as an excitation signal, a rotor which receives the excitation signal, and a rotary transformer which detects an output signal of the rotor, the resolver being arranged to detect angle information of the rotor. The resolver further includes a controller which outputs angle information at a zero cross point of the output signal detected by the rotary transformer. The resolver can provide high detection accuracy and be low in cost.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: April 6, 2010
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventor: Tetsuji Inoue
  • Publication number: 20100066347
    Abstract: A resolver the resolver comprising an excitation coil for receiving an excitation signal formed by amplitude modulation of a high-frequency signal and a detection coil for outputting a detection signal. The resolver is arranged to detect a change in position of a rotor provided with the excitation coil or the detection coil based on the detection signal varying with the change in position of the rotor. The high-frequency signal is a digitized signal generated from a reference clock.
    Type: Application
    Filed: July 29, 2009
    Publication date: March 18, 2010
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide Nakamura, Tomoaki Inoue
  • Patent number: 7659688
    Abstract: Methods and systems are provided for aligning a resolver in an electric motor system. The method includes commanding a d-axis current command and a speed command, operating an electric motor without a load in response to the d-axis current command and the speed command, determining a rotor speed in response to the speed command, and determining an offset of the resolver based on the speed command and the rotor speed when the rotor speed has substantially stabilized.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: February 9, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Steven E. Schulz, Sean E Gleason, Brian A Welchko
  • Patent number: 7561968
    Abstract: In accordance with an embodiment of the present invention, a resolver system has at least one resolver and at least one amplifier in electrical communication with each resolver. A reference circuit is in electrical communication with the amplifiers. The reference circuit provides reference signals to the amplifiers. A non-linearity calibration and compensation circuit in communication with each amplifier uses the amplified reference signals to provide scale factors, so as to enhance a precision of the resolver system.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: July 14, 2009
    Assignee: The Boeing Company
    Inventors: Ketao Liu, Yeong-Wei A. Wu, Jeffrey L. Lee
  • Patent number: 7560891
    Abstract: A deflection amount Ps representing a difference between a position detection value Pl of a driven body and a position detection value Pm of a motor is detected. A position calculator proportional constant Kp, a time constant Tp of a first-order lag circuit that inputs a the deflection amount Ps, and a time constant Tv of a first-order lag circuit that inputs a difference between a speed detection value Vl of the driven body and a speed detection value Vm of the motor are changed based on the deflection amount Ps.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: July 14, 2009
    Assignee: Okuma Corporation
    Inventors: Tomohiro Shibata, Tomohisa Kameyama
  • Publication number: 20090085508
    Abstract: A motor controller includes a reference signal generator; an A/D converter performing A/D conversion of the cosine and the sine signals outputted from a resolver; a first amplitude calculator calculating cosine and sine signal amplitudes based on twice-A/D converted cosine and sine signals respectively; a second amplitude calculator calculating averages of the cosine and the sine signals, and that calculates the amplitude of the cosine signal from a difference between the cosine signal average and a latest A/D converted cosine signal, and that calculates the amplitude of the sine signal from a difference between the sine signal average and a latest A/D converted sine signal; a synthesizer synthesizing the cosine and sine signal amplitudes obtained by the first and the second amplitude calculators respectively; a rotational angle calculator calculating a rotational angle based on the synthesized cosine and sine signal amplitudes; and a PWM controller.
    Type: Application
    Filed: March 24, 2008
    Publication date: April 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kazunobu Nagai, Sari Maekawa