Control Or Position Information Digitally Stored On Disk (e.g., Computer Hard Drive Position Detection, Etc.) Patents (Class 318/400.16)
  • Patent number: 9831808
    Abstract: A system and method for sensing rotor position of a three-phase permanent magnet synchronous motor (PMSM) includes a controller coupled with the PMSM and causing a plurality of voltage pulses to be applied thereto. A timer and/or an analog-to-digital converter is coupled with the PMSM and measures a plurality of values (measured values) from a three-phase inverter coupled with the PMSM. Each measured value may correspond with one of the plurality of voltage pulses and includes a current value or time value corresponding with an inductance of the PMSM. One or more logic elements calculates, based on the measured values and on one or more position algorithms, a position of a rotor of the PMSM relative to a stator of the PMSM. The system is configured to calculate the position of the rotor when the rotor is in a stopped configuration and when the rotor is in a rotating configuration.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: November 28, 2017
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Kazumasa Takai
  • Patent number: 9614474
    Abstract: In suppression of torque ripple with a periodic disturbance observer, adjustment of a gain portion is determined sequentially during monitoring operation of monitoring an operating condition. Therefore, many adjusting parameters are involved and achievement of correction is dependent on the skill of a person in charge of adjustment or design. The periodic disturbance observer is provided with a model correcting means or section which calculates an error of an identification model by using a time difference quantity by an output of the periodic disturbance observer and a sensed value of a plant and corrects the identification model with the error of the identification model. Finally, the system performs the torque ripple suppression control with an accurately estimated periodic disturbance.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: April 4, 2017
    Assignee: MEIDENSHA CORPORATION
    Inventors: Takashi Yamaguchi, Yugo Tadano
  • Patent number: 9419552
    Abstract: A motor assembly broadly includes a motor, a motor controller, and an interface controller having an integrated power supply. The integrated power supply includes an AC to DC power conversion and voltage reduction component. The motor controller and the interface controller receive line voltage electrical power without the need for an external transformer.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: August 16, 2016
    Assignee: Nidec Motor Corporation
    Inventors: Christopher D. Schock, Randy L. Bomkamp
  • Patent number: 8872449
    Abstract: A distributed-arrangement linear motor in which stators are arranged in a distributed manner and a method of controlling the distributed-arrangement linear motor are provided. The linear motor 1 is a linear motor in which a stator and a movable member are relatively movable, wherein the stator and the movable member respectively have periodic structures in which plural kinds of poles of the stator and the movable member (12a, 12b, 12c) (22a, 22b, 22c) which magnetically act each other and arranged periodically subsequently in an order according to the arrangement in a direction of the relative motion therebetween; a plurality of stators are arranged in a distributed manner in the direction of the relative motion; a distance D1, D2 between adjacent stators is not more than a length Lmv of the movable member; the pole of the stator is formed of a coil 11; and a current control unit that controls current to be supplied to the coil based on the distance between the stators is provided.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: October 28, 2014
    Assignee: THK Co., Ltd.
    Inventors: Toshiro Tojo, Toshiyuki Aso, Yuki Nomura, Akihiro Unno
  • Publication number: 20140246998
    Abstract: A circuit may be configured to adjust a correction signal for each phase of an electric motor based on a rotational position of a spindle of the electric motor, generate a distorted waveform based on the correction signal, and drive the electric motor in response to the distorted waveform. In some examples, back electromotive force (BEMF) may be determined in order to adjust a motor drive waveform, which may reduce or eliminate motor vibrations. A motor drive signal may be pre-warped (i.e. distorted) such that when the correctional signal and drive signals are combined, there is a reduction in acoustic emissions or motor vibrations. Other parameters, such as cogging torque, may be measured to reduce motor vibration and acoustic emissions.
    Type: Application
    Filed: April 26, 2013
    Publication date: September 4, 2014
    Applicant: Seagate Technology LLC
    Inventors: Matthew McLeod Chadsey, John Charles Purkett
  • Patent number: 8786221
    Abstract: A method for controlling a permanent magnet synchronous motor includes detecting an absolute angular position and using the angular position to calculate a rotational speed of the motor; detecting a voltage of a battery as a power source; calculating a compensated speed from a rotational speed of the permanent magnet synchronous motor based on a torque command, the rotational speed of the permanent magnet synchronous motor, and the battery voltage; generating a d-axis current command and a q-axis current command corresponding to the torque command and the compensated speed; calculating a d-axis voltage command and a q-axis voltage command based on the d-axis current command and the q-axis current command; converting the d-axis voltage command and the q-axis voltage command into three-phase voltage commands based on the detected absolute angular position; and controlling the operation of the permanent magnet synchronous motor based on the three-phase voltage commands.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: July 22, 2014
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Bum Sik Kim, Young Kook Lee, Jin Hwan Jung
  • Patent number: 8766586
    Abstract: A magnetic pole position detecting device includes a calculating unit for correcting a magnetic pole position detected by a magnetic pole position detecting unit. In this magnetic pole position detecting device, an additional phase is added to the magnetic pole position detected by the magnetic pole position detecting unit, in order to move a rotor. In relation to a movement amount before and after this movement, a movement amount detected by the magnetic pole position detecting unit is compared with a movement amount detected by an encoder. When a difference between them is larger than a predetermined threshold, a process of detecting the magnetic pole position is determined as false detection.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: July 1, 2014
    Assignee: Fanuc Corporation
    Inventors: Naoto Sonoda, Masato Aochi
  • Patent number: 8742714
    Abstract: In order to track the position of a component driven by an electric motor, wherein rotational movements of the electric motor are detected and used for a position count, deviations from an anticipated position count are determined and added to the position given by the position count as an uncertainty region.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 3, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Stefan Holzmann, Roman Morawek, Alexandre Pozzer
  • Patent number: 8541969
    Abstract: In a method and a device for pulse width modulated (PWM-) activation of an electrical drive motor (2) of an adjustment arrangement based on a reference of the mechanical system of the adjustment arrangement that corresponds to a relationship between the force (F) on the drive motor (2) and the adjustment path (s) or the adjustment time (t) of the adjustment arrangement stored in a memory (9), an anticipated future force value (F(t+t0)) is determined based on the reference of the mechanical system in order to adjust the PWM activation in advance by utilizing this future force value such that motor synchronization fluctuations can be prevented upon anticipated mechanical fluctuations in the adjustment arrangement.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: September 24, 2013
    Assignee: Continental Automotive GmbH
    Inventors: Stefan Holzinger, Roman Morawek, Daniel Zuffer
  • Patent number: 8461790
    Abstract: The encoder includes a disk in a disk shape that is arranged rotatably about a rotation axis and that includes one track in a ring shape on which a rotating grating is formed and one or more origin detection areas serving as partial areas on which a rotating grating is formed, and a mask that is fixed and arranged in a manner facing the disk and on which one or more fixed gratings are formed so as to constitute a diffraction interference optical system together with the rotating gratings. A plurality of slits and included in at least one rotating grating are formed along a curved line obtained by curving a plurality of radial lines about the rotation axis in the circumferential direction at predetermined curvature such that pitches and of the slits and can be set to a predetermined value.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: June 11, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yosuke Yamaguchi, Yasushi Yoshida, Shirou Yoshidomi
  • Patent number: 8421388
    Abstract: A failure identification part identifies a switching element pair having off-failure, in which a FET of the switching element pair in a first inverter part is disabled to turn on. A failure-time control part controls other switching element pairs and of the first inverter part based on failure-time phase current command values calculated as a function of a rotation position and a q-axis current command value. The failure-time control part controls a second inverter part normally. A motor is persistently driven with the minimum reduction in motor torque, even when the FET fails.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: April 16, 2013
    Assignee: Denso Corporation
    Inventor: Yasuhiko Mukai
  • Patent number: 8405332
    Abstract: Systems, methods and computer program products for reducing or removing current spikes generated during a current recirculation period associated with phase switching in a spindle motor are described. In some implementations, the duty cycle of the drive signals applied to the windings of the spindle motor can be adjusted to reduce or eliminate the current surge resulting from current recirculation. In some implementations, the duty cycle of the drive signals during spin-up can be reduced based on a current limit, and the reduced duty cycle can then be used to drive the spindle motor taking into account of current surges in the supply current.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: March 26, 2013
    Assignee: Marvell International Ltd.
    Inventors: Ravishanker Krishnamoorthy, Foo Leng Leong
  • Patent number: 8390226
    Abstract: According to an aspect of the invention, a method includes: applying a voltage across a motor to accelerate the motor over a predetermined number of time intervals; determining whether a current flowing through the motor decreases as the motor accelerates over the predetermined number of time intervals; and increasing the voltage by a predetermined voltage amount during each time interval if it is determined that the current is decreasing.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: March 5, 2013
    Assignee: Marvell International Ltd.
    Inventors: Ravishanker Krishnamoorthy, Foo Leng Leong
  • Patent number: 8326562
    Abstract: An information management system includes a storage medium storing position error information of the rotation sensor obtained based on information of the back electromotive force and output information from the rotation sensor in an inspection process in which a back electromotive force is measured by mechanically driving the rotary electrical machine after the rotary electrical machine and the rotation sensor are assembled, wherein the storage medium is provided in a state capable of being read via communication when a control device controlling the rotary electrical machine is assembled with the rotary electrical machine.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: December 4, 2012
    Assignee: Aisin AW Co., Ltd.
    Inventors: Yoshinari Nakagawa, Tomoo Atarashi, Tatsuya Kondo, Masakazu Sato
  • Patent number: 8198853
    Abstract: A motor speed controller and a method of controller a speed of a motor are provided. The system and method include a motor and a motor controller that monitors operation of the motor based on electromotive force (EMF) conditions of the motor. The motor controller cuts a voltage to the motor, measures an electromotive force (EMF) of the motor at a predetermined time after the cutting of the voltage to the motor, and compares the measured electromotive force (EMF) to a table.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: June 12, 2012
    Assignee: BSH Home Appliances Corporation
    Inventor: George Savitz
  • Patent number: 8159164
    Abstract: A variable-delay-time control system for a motor is provided. The system includes a control unit, a driving unit, and a motor. The control unit is used to output at least one control signal according to at least one predetermined signal, and the control signal has a variable delay time. The driving unit is connected to the control unit, and is used to receive the control signal and generate a driving signal. The motor is connected to the driving unit, and conduction time of the motor is controlled according to the driving signal and the variable delay time. With the variable-delay-time control system of the present invention, the delay time of the control signal is variable, so the motor can operate at a high efficiency (for example, at a reduced current). Moreover, as the variable-delay time can be adjusted according to the predetermined signal, the motor can operate at a high efficiency in different operating states, thus improving the overall efficiency of the motor.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: April 17, 2012
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Alex Horng, Hsin-Nan Lin, Chien-Heng Peng
  • Patent number: 8111029
    Abstract: A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower using the ECM and determining if the resulting blower rotation is indicative of the desired direction of rotation for the blower.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: February 7, 2012
    Assignee: RBC Manufacturing Corporation
    Inventors: Stephen Solan, Jr., Brian L. Beifus, Roger C. Becerra
  • Patent number: 7990089
    Abstract: Methods, systems and computer program products for compensating repeatable timing variations associated with a spindle motor are described. Specifically, a repetitive error correction factor may be determined using a computational model which predicts timing variations. The correction factor can then be used to cancel the effect of the actual timing variations upon the spindle motor.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: August 2, 2011
    Assignee: Marvell International Ltd.
    Inventors: Edward Ying, Pantas Sutardja
  • Patent number: 7973502
    Abstract: A drive unit includes a rotating electrical machine; a rotation sensor that detects a rotational position of a rotor of the rotating electrical machine, and a storage medium. In an inspecting step of measuring a counter electromotive force by mechanically driving the rotating electrical machine after the rotating electrical machine and the rotation sensor are assembled together, positional error information of the rotation sensor obtained based on information of the counter electromotive force and output information from the rotation sensor is stored in the storage medium. The storage medium is integrally provided to the drive unit in such a state that the storage medium is readable upon assembling a control device that controls the rotating electrical machine.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 5, 2011
    Assignee: Aisin Aw Co., Ltd.
    Inventors: Yoshinari Nakagawa, Tomoo Atarashi, Takafumi Koshida
  • Patent number: 7873851
    Abstract: A method is used in powering disk drive spinup. A disk drive is powered with a primary power source and is temporarily powered with a secondary power source in addition to the primary power source. The secondary power source powers the disk drive when the disk drive is spinning up.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: January 18, 2011
    Assignee: EMC Corporation
    Inventors: Thomas E. Linnell, Phillip J. Roux
  • Patent number: 7808193
    Abstract: In a motor having a number of poles that have nominally equiangularly-spaced positions that in fact deviate from those positions, the actual periods between zero-crossings of the back-EMF generated during pole-pair interactions are measured. The ratios of the various pole periods can then be computed, and the motor drive profile can be adjusted for each pole by applying the respective ratio to fit samples of the back-EMF profile to each respective pole.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: October 5, 2010
    Assignee: Marvell International Ltd.
    Inventors: Ravishanker Krishnamoorthy, Foo Leng Leong
  • Patent number: 7800326
    Abstract: A brushless D.C. motor has a rotor with a plurality of magnets secured to a mounting surface. Each magnet has an RFID tag secured to a magnet surface, with each RFID tag having stored therein a unique identification character serving to identify the magnet. A stator has a plurality of pole teeth separated by slots, each pole tooth having a power coil wound thereabout. A plurality of RFID interrogation antennae are mounted adjacent the pole teeth. An RFID reader generates r.f. interrogation signals broadcast by the antennae to the RFID tags. The RFID tags respond by broadcasting the unique identification character whenever an interrogation signal is sensed as the tag enters the region of a pole tooth. This position and magnet identification information is received by the RFID reader, which processes the information and sends it to a motor controller and driver unit, which supplies operating power to the individual power coils.
    Type: Grant
    Filed: March 8, 2008
    Date of Patent: September 21, 2010
    Assignee: Silicon Valley Micro MCorp.
    Inventors: Shengbo Zhu, Su Shiong Huang
  • Patent number: 7795827
    Abstract: The present invention discloses a control system for controlling a motor for a heating, ventilation and air conditioning (HVAC) or a pump comprising: an opto-isolated speed command signal processing interface into which a signal for controlling a speed of the motor is inputted and which outputs an output signal for controlling the speed of the motor being transformed as having a specific single frequency; a communication device into which a plurality of operation control commands of the motor; an opto-isolated interface for isolating the plurality of operation control commands inputted through the communication device and the transformed output signal for controlling the speed of the motor, respectively; a microprocessor, being connected to the opto-isolated interface, for outputting an output signal for controlling an operation of the motor depending on the plurality of operation control commands and the transformed output signal for controlling the speed of the motor; a sensor, being connected to the motor,
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: September 14, 2010
    Inventor: Young-Chun Jeung
  • Patent number: 7791293
    Abstract: A current sensor of a motor controller detects the current applied to a motor drive circuit and thus a phase where a failure cannot be detected would occur without taking any measures. However, an abnormal current monitor section contained in a microcomputer receives a voltage signal of an average value of the currents detected in the current sensor by allowing a signal to pass through a first LPF having a cutoff frequency sufficiently lower than the frequency of a PWM signal. Therefore, whether or not the value is within a predetermined normal range is checked, whereby whether or not some failure containing a failure of the current sensor occurs can be easily determined about every phase.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: September 7, 2010
    Assignee: JTEKT Corporation
    Inventors: Shigeki Nagase, Takeshi Ueda, Ken Matsubara, Toshiaki Oya, Yasuyuki Yoshii
  • Patent number: 7692395
    Abstract: A controller is provided for operating a DC motor through a commutation circuit and for synchronizing the commutation circuit to motor position and speed by measuring back EMF voltages along commutation cycle steps during which the measured phase is not being driven. In connection with each such step, the back EMF voltage is measured at two points offset from the center of the step. The controller uses the measured voltages and their corresponding locations to locate the center point of the step through extrapolation. The motor can be analyzed for determining suitable locations for the measuring points.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: April 6, 2010
    Assignee: The Bergquist Torrington Company
    Inventor: Robert G. Brown
  • Patent number: 7667420
    Abstract: A position sensor system for detecting an absolute angular position of a rotor axle of an electric motor at a predetermined angular resolution W. The position sensor system include, a first Hall sensor device having a first sensor magnet set-up, set up on the rotor axle, and two first Hall sensors, which are set up at an angular offset with respect to the rotor axle so as to achieve a position angle resolution of 90°, and having a second sensor magnet set-up, set up on rotor axle, having n pole pairs and a number m of second Hall sensors, which are set up at an angular offset to one another with respect to the rotor axle, the set-up and the number n of pole pairs and the set-up and the number m of the second Hall sensors being selected so as clearly to detect angular segments at the predetermined angular resolution W within the angular range of the angular offset of 90°.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: February 23, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Tero Jaervelaeinen, Gilles Schmitt
  • Patent number: 7638960
    Abstract: A positioning device for positioning a positioning element has a motor (18) that drives the positioning element (10) and has a measuring device that directly measures the positioning travel of the positioning element for controlling the motor (18). For this, a traction cable (32) is joined to the positioning element and is wound onto a drum (36). For measuring the positioning travel of the positioning element, the rotational position of the drum (36) is measured by means of an encoder (42).
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: December 29, 2009
    Assignee: Sick Stegmann GmbH
    Inventors: Josef Siraky, Rolf Hartlieb, Josef Maier
  • Patent number: 7605560
    Abstract: There is provided a motor driving apparatus in which variations in individual circuit constants have a small effect even when a drive current is small. An error amplifier circuit amplifies a difference between a current detection signal showing a current value of a drive current that flows in the motor and a drive command signal controlling the drive current and converts an amplified difference into a current to output the current as an error amplifier current signal. A D/A conversion circuit generates a sinusoidal signal from the error amplifier current signal based on a digital signal sequence outputted from a rotational position detecting unit. It is preferable that a transfer coefficient of the error amplifier circuit is inversely proportional to the resistance value of the D/A conversion circuit.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 20, 2009
    Assignee: Panasonic Corporation
    Inventor: Shuji Tamaoka
  • Publication number: 20090218968
    Abstract: The present invention discloses a control system for controlling a motor for a heating, ventilation and air conditioning (HVAC) or a pump comprising: an opto-isolated speed command signal processing interface into which a signal for controlling a speed of the motor is inputted and which outputs an output signal for controlling the speed of the motor being transformed as having a specific single frequency; a communication device into which a plurality of operation control commands of the motor; an opto-isolated interface for isolating the plurality of operation control commands inputted through the communication device and the transformed output signal for controlling the speed of the motor, respectively; a microprocessor, being connected to the opto-isolated interface, for outputting an output signal for controlling an operation of the motor depending on the plurality of operation control commands and the transformed output signal for controlling the speed of the motor; a sensor, being connected to the motor,
    Type: Application
    Filed: March 3, 2008
    Publication date: September 3, 2009
    Inventor: YOUNG-CHUN JEUNG
  • Publication number: 20090189558
    Abstract: An electric actuator motor drives an actuator leg between inner and outer limits of an actuator stroke relative to an actuator base. A controller detects when the actuator leg is at one of the inner and outer stroke limits by monitoring and comparing actuator motor power draw to known actuator motor power draw values associated with the operation of an electric actuator when its leg has reached an actuator leg stroke limit. A position sensor senses changes in the position of a monitored actuator component and provides corresponding signals to the controller. The controller calculates the position of the monitored actuator component relative to the position that the monitored actuator component was in when the actuator leg was in a predetermined home position. The controller recognizes and records the concurrent position of the monitored actuator component as indicating that the actuator leg is in the home position whenever the leg reaches a stroke limit.
    Type: Application
    Filed: January 29, 2008
    Publication date: July 30, 2009
    Applicant: Innovative Design Solutions
    Inventors: Robert Ford, Shawn Haley, Mark Woloszyk, John Manfreda
  • Publication number: 20090128070
    Abstract: A commutation circuit for driving a brushless DC motor is controlled according to a commutation cycle composed of alternating primary steps and transitional steps. The commutation circuit includes pairs of field effect transistors coupled in series between the high voltage and low voltage terminals of a DC power supply. Output terminals between each pair of transistors are individually coupled to the phases of a DC motor. A controller operates the commutation circuit to selectively set the phases at active and inactive states. The controller further employs a plurality of voltage control functions individually associated with the motor phases to selectively modulate the voltage applied to one of the phases during the active states, to provide transitional steps in the commutation cycle during which the applied voltage is modulated to reduce its magnitude with respect to the high voltage or the low voltage.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 21, 2009
    Inventor: Robert G. Brown
  • Publication number: 20090128071
    Abstract: A controller is provided for operating a DC motor through a commutation circuit and for synchronizing the commutation circuit to motor position and speed by measuring back EMF voltages along commutation cycle steps during which the measured phase is not being driven. In connection with each such step, the back EMF voltage is measured at two points offset from the center of the step. The controller uses the measured voltages and their corresponding locations to locate the center point of the step through extrapolation. The motor can be analyzed for determining suitable locations for the measuring points.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 21, 2009
    Inventor: Robert G. Brown
  • Patent number: 7535192
    Abstract: A positioning control device executes disturbance observer control having a disturbance suppression function, wherein changes of control characteristics are prevented even if the disturbance frequency is suppressed. When a control value of an actuator is computed using estimated gains of the actuator and estimated gains of disturbance according to an estimated position error by disturbance observer control including a model of the actuator and model of the disturbance, the disturbance frequency is estimated according to the estimated position error, and the estimated gains of the actuator and the estimated gains of the disturbance, corresponding to the disturbance frequency, are changed. Therefore appropriate observer control according to the disturbance frequency can be implemented.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: May 19, 2009
    Assignee: Fujitsu Limited
    Inventor: Kazuhiko Takaishi
  • Patent number: 7479747
    Abstract: In a storage device, a BEMF control is not performed on a motor and the motor is stopped if the motor is in a BEMF-control possible state. Once the motor has completely stopped, a start-up control is performed on the motor.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: January 20, 2009
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Oyabu, Takao Abe, Tetsuya Tabuchi
  • Patent number: 7385365
    Abstract: In a method for error detection of a brushless electric motor, at least one first motor parameter is measured or determined, and a second, estimated motor parameter is estimated on the basis of the first motor parameter. The second, estimated motor parameter is compared to a second, measured or determined motor parameter. An error of the electric motor can be found out according to the comparison.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: June 10, 2008
    Assignee: Continental Teves AG & Co. oHG
    Inventor: Stefan Feick
  • Patent number: RE45388
    Abstract: A compact field programmable gate array (FPGA)-based digital motor controller (102), a method, and a design structure are provided. The compact FPGA-based digital motor controller (102) includes a sensor interface (206) configured to receive sensor data from one or more sensors (104) and generate conditioned sensor data. The one or more sensors (104) provide position information for a DC brushless motor (108). The compact FPGA-based digital motor controller (102) also includes a commutation control (210) configured to create switching commands to control commutation for the DC brushless motor (108). The commutation control (210) generates commutation pulses from the conditioned sensor data of the sensor interface (206). The compact FPGA-based digital motor controller (102) also includes a time inverter (208) configured to receive the commutation pulses.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: February 24, 2015
    Assignee: Hamilton Sundstrand Space Systems International, Inc.
    Inventors: Robert Wichowski, Harold J. Hansen, Kevin G. Hawes