Abstract: Disclosed herein is a motor control apparatus and a method thereof. A phase error of the reference voltage output corresponding to a time delay caused by digital control may be compensated to stably control a motor, thereby improving the stability of a system. The phase compensation unit may be provided therein to convert a reference voltage of the synchronous coordinate system into a reference voltage of the stationary coordinate system when controlling the high-speed operation of the motor, thereby compensating a phase error of the reference voltage output, and allowing the motor to be operated at a high speed while maintaining its efficiency and reducing a volume of the compressor.

Abstract: Exemplary embodiments are directed to a converter for an electrical system that is controlled in such that switching sequences for the converter, determined with respect to an optimization goal are modified such that by correcting a flux error resulting from assumptions on which the first optimization of the switching sequence is based.

Abstract: In a motor control unit, a current-carrying failure detection unit determines a first determination condition and a second determination condition. The current-carrying failure detection unit measures a duration of a state where the first determination condition is satisfied, and a duration of a state where the second determination condition is satisfied. When the first or second duration exceeds a predetermined reference period, the current-carrying failure detection unit determines that a current-carrying failure has occurred.

Abstract: An observer (404), operating during a time when open loop control (402) is being used to drive a synchronous motor (401), the output of the observer (404) being a signal, E_I_angle, related to the angle between a rotational EMF vector and the current excitation vector, the observer (404) determining the angle by an iterative calculation incorporating a summation term, the summation term summing the variation of the quadrature component of a rotational EMF vector relative to an estimated EMF position vector, and using the angle output of the observer to update the estimate of the rotational EMF position vector. In a further aspect of the invention the observer output signal, E_I_angle, can be used to determine the transition to closed loop control (405), when the observer output signal reaches a value indicating conditions close to pull out conditions.

Abstract: The controller estimates torque output by the motor and controls the current supplied to the motor in such a manner that a torque estimate of the motor obtained by the estimation corresponds to the torque command value. A torque estimation calculator 120 estimates the torque output by the motor. A phase error command calculator 125 calculates a command value of a phase error from the deviation between the torque estimate and a torque command value. A speed estimation calculator 130 outputs a speed estimate in such a manner that a phase error estimate corresponds to the command value of the phase error.

Abstract: In an ?? coordinate system, vectors of currents flowing in three-phase AC motor are set in directions fixed relative to a zero vector current according to a voltage applied in six non-zero vector switching modes of an inverter. A current vector closest to a command current value is specified from those current vectors. Then, only a non-zero vector current when operating the inverter in the non-zero vector switching mode corresponding to the specified current vector is calculated.

Abstract: A motor drive apparatus that can be used to drive a wide range of brushless motors without any limit to a magnetic pole number of a rotor magnet. One rotational period T of the rotor magnet is obtained, and one period S of the sine wave drive signal according to a mathematical expression of S=T/(n/2). The one period S of the sine wave drive signal is updated at intervals of one period of the output signal from one magnetic pole detecting element among the three magnetic pole detecting elements.

Abstract: Disclosed are a method and system for detecting a fault of a parallel coil type permanent magnet motor. This method includes driving a parallel coil type motor on the basis of a pre-defined current reference value, detecting a phase current vector of the motor, and calculating a current compensation value for removing a negative sequence component of the motor on the basis of the phase current vector.

Abstract: A control device of a three-phase AC motor includes: an inverter for driving the motor; a current sensor for sensing a current; and a control means for controlling the motor by switching on/off each switching element in the inverter with feeding back dq axis current calculated values to dq axis current command values, or with feeding back a torque estimated value to a torque command value. The control means includes one first order current operation part that: expands a phase current sensed value of one phase in Fourier series as a function of an electric angle; extracts a first order component of the Fourier series; operates a first order current operated value; and integrates a calculated value based on the phase current sensed value at an integral angle for k periods of the electric angle so that Fourier coefficients are calculated.

Abstract: A control device for an AC rotating machine includes a voltage command calculation means (1) that calculates voltage commands on rotation two axes and a voltage applying means (2) that applies a voltage to an AC rotating machine (3), based on voltage commands on the rotation two axes outputted by the voltage command calculation means (1); the voltage command calculation means (1) calculates first-axis and second-axis voltage commands on the rotation two axes and reduces the limit value of the second-axis voltage command in proportion to the squared first-axis voltage command.

Abstract: A magnetic pole position detector includes, a voltage command unit that generates high-frequency voltage command in a dq coordinate system, a three-phase transformation unit that transforms the high-frequency voltage command in the dq coordinate system to high-frequency voltage command in a three-phase coordinate system by using an estimated magnetic pole position, a current detection unit that detects three-phase current fed from a power converter for generating drive power, a dq transformation unit that transforms the detected three-phase current to current in the dq coordinate system by using the estimated magnetic pole position, an estimated magnetic pole position calculation unit that calculates a new estimated magnetic pole position to be used in three-phase dq transformations, and a magnetic pole position confirmation unit that confirms that, when converging on a certain position, the estimated magnetic pole position is the magnetic pole position at the time when the synchronous motor is started.

Abstract: A motor control device according to the present invention includes a motor driving unit for driving a motor, a current vector controller, a magnetic-flux weakening current command generator, and one of a target command limiter and a q-axis current command limiter. The current vector controller controls a current of the motor by separating the current into a d-axis current and a q-axis current orthogonal to each other, in accordance with a target command value from the outside. The magnetic-flux weakening current command generator generates a d-axis current command to control the amount of the d-axis current, based on one of differences, i.e. a difference between a first predetermined reference value and the absolute value of a voltage command from the current vector controller to the motor driving unit and a difference between a second predetermined reference value and a q-axis component of the voltage command.

Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.

Abstract: Provided is an apparatus for operating interior permanent magnet synchronous motor by receiving a first current command of a flux weakening control region I in a system including a detector measuring a position and a speed of a rotor of an IPMSM, the apparatus including a feedback unit transmitting over-modulated voltage information to a correction unit, the correction unit using the rotor speed and the over-modulated voltage information to correct the first current command to a second current command of a flux weakening control region II, a control unit controlling the second current command to output a voltage, a first limit unit limiting an output of the control unit to a maximum voltage synthesizable by an inverter unit, and the inverter unit applying a 3-phase voltage command for following a command torque to the IPMSM using an output of a voltage limit unit.

Abstract: The present invention relates to an AC motor control device and, particularly, to provide an AC control device capable of simply setting a state quantity of an AC motor non-linearly variable, in accordance with the motor driving state and using the setting in motor control, the present invention can be achieved by including a state quantity calculating unit (13, 13a, 13b, 13c) for calculating a state quantity corresponding to a coil interlinkage flux which is an internal quantity of the motor, calculating a setting value of the coil interlinkage flux defined on one axis out of two axes, that is, d and q axes, with a function formula using a current defined on the same one of the axes and a function formula using a state variable defined on the other one of the axes.

Abstract: Methods, system and apparatus are provided for controlling third harmonic voltages when operating a multi-phase machine in an overmodulation region. The multi-phase machine can be, for example, a five-phase machine in a vector controlled motor drive system that includes a five-phase PWM controlled inverter module that drives the five-phase machine. Techniques for overmodulating a reference voltage vector are provided. For example, when the reference voltage vector is determined to be within the overmodulation region, an angle of the reference voltage vector can be modified to generate a reference voltage overmodulation control angle, and a magnitude of the reference voltage vector can be modified, based on the reference voltage overmodulation control angle, to generate a modified magnitude of the reference voltage vector.

Abstract: An apparatus for measuring a position deviation of a rotor of a permanent magnet synchronous motor includes a control unit, a power transformation unit, a rotor position estimator and a calculation unit. The control unit receives a d-axis DC voltage signal and a q-axis AC voltage signal and receives an initial value of the rotor position and a high-frequency signal to output a three-phase command signal. The power transformation unit receives the three-phase command signal and outputs a three-phase control signal for controlling the motor. The rotor position estimator receives a three-phase current feedback signal corresponding to an operation of the motor and generates an estimation value of the rotor position. The calculation unit performs calculation to the initial value and the estimation value to generate a deviation value of the rotor position. Moreover, a method for measuring the position deviation is also disclosed herein.

Abstract: A system for estimating a rotor position may include a synchronous machine, including at least one stator winding pair configured to create a magnetic field when an input voltage is applied and a rotor having a field winding and configured to rotate within the magnetic field created by the at least one stator winding pair. The system may include a phase detector configured to determine a phase difference between the input voltage and a field voltage induced in the field winding of the rotor. The system may also include a processor configured to receive a signal from the phase detector indicative of the phase difference between the input voltage and the field voltage, and to estimate the rotor position based on the phase difference.

Abstract: A method of estimating inductances and flux linkages of an electrical machine supplied with drive currents via current regulators. Drive current values are measured and fed back to the regulators for closed-loop control. The method includes providing one current regulator with an alternating current value either for a direct axis current reference i*d or for a quadrature axis current reference i*q of the machine current vector, while providing another current regulator with a predetermined direct current value for the remaining one of the two current references i*d and i*q. After a predetermined time, a varying signal is superimposed onto an output signal generated by the current regulator in response to the AC value. Finally, a contribution signal, which corresponds to the contribution of the superimposed varying signal to the drive currents, is determined, and the machine inductances and flux linkages are estimated on the basis of the contribution signal.

Abstract: A power converting apparatus including a power converter that converts a DC voltage into an AC voltage and applies the AC voltage to an AC rotating machine and a control unit that controls the power converter based on an operation command from the outside is provided. The power converting apparatus includes: a first calculating unit that calculates and outputs, from a d-axis current detection value and a q-axis current detection value detected by the AC rotating machine and current command values based on the operation command, first voltage command values to the power converter, magnetic fluxes of the AC rotating machine, and an angular frequency; and a second calculating unit that sets, as an initial value, at least one of the magnetic fluxes and the angular frequency input from the first calculating unit and calculates and outputs second voltage command value to the power converter and an angular frequency.

Abstract: A current vector controlled synchronous reluctance motor and control method thereof, wherein the motor has a coil on each of the teeth. The coils form a U-phase winding, a V-phase winding and a W-phase winding. The phase windings receive a balanced three-phase current vector to induce closed magnetic field lines, such that the coils induce same magnetic poles adjacent to the rotor unit. Two short magnetic routes are formed along three adjacent teeth and the rotor unit. The efficiency of the reluctance motor is high.

Abstract: In a method of controlling a reluctance polyphase electric machine, or an automobile motor, currents injected into each coil of a stator of the machine are deduced by a transformation of a pair of excitation currents and of armature current defined in a reference frame rotating with the rotor of the machine, such that: the excitation current is composed of a fundamental sinusoidal signal, to which are added successively other odd harmonics of increasing order when a torque setpoint of the machine increases, and the armature current is a signal proportional to the estimated or measured electromotive force of the machine.

Abstract: A controller for an electric actuator includes a reference model that generates position and speed reference signals in response to a position command signal and employs a feed forward model that accounts for dynamic loading of the electric actuator. The feed forward model receives the position and speed reference signals provided by the reference model, and in response generates feed forward signals that account for mechanical characteristics of the electric actuator.

Abstract: A system for controlling a voltage inverter, or supplying power to a multiphase electric motor of an automobile vehicle, including: a mechanism generating values of power supply voltages for each phase of the electric motor, together with an amplitude value of the power supply voltages; a phase-splicing determination mechanism; and a controller controlling the phase splicing cooperating to control transmission to the voltage inverter of duty cycles generated by determining the duty cycles, as a function of values of power supply voltages for each phase of the electric motor, and also of the amplitude value of the power supply voltages.

Abstract: Provided is an apparatus for operating interior permanent magnet synchronous motor in a system including a detector measuring a position and a speed of a rotor of an IPMSM, the apparatus including an output unit generating and outputting a current command driving a MTPA (Maximum Torque Per Ampere) based on the command torque, a correction unit correcting the current command outputted by the output unit, a feedback unit transmitting over-modulated voltage information to the correction unit, a control unit controlling the current command to output a voltage, a first limit unit limiting an output of the control unit using a maximum voltage synthesizable by an inverter unit, and the inverter unit applying a 3-phase voltage command for tracking a command torque to the IPMSM using an output of the first limit unit.

Abstract: A method and an arrangement are provided for controlling a sensorless permanent magnet synchronous machine using a frequency converter connected to feed the machine with electrical power. A current vector having a magnitude is produced to the stator of the machine with the frequency converter, and the current vector is rotated for rotating the rotor of the machine. Prior to starting the drive, a value is defined for the magnitude of the current vector and a frequency limit. The defined value is used as the magnitude of the current vector when the rotor of the machine is rotated with a frequency that is lower than the defined frequency limit. A vector control method is used for controlling the machine when the frequency of the machine is higher than or equal to the defined frequency limit.

Abstract: A sensor detects position data for a rotor of the motor at a first time. A data processor receives the detected position data associated with a first time delay. A sensing circuit senses an analog current at the motor during a second time delay. An analog-to-digital converter converts the analog current to a digital current data during a third time delay. The fourth time delay is detected between actual current reading instant and position reading instant in a data processor. The digital phase current data is transformed into measured direct and quadrature axes control current data based on synchronization or temporal alignment of the position data with the actual measured analog phase current at the starting time by compensating the position data by a sum of the second time delay, the third time delay and the fourth time delay, where the first time delay is subtracted from the sum.

Abstract: A controller of an AC motor includes a d-axis voltage command section to generate a d-axis voltage command on a d axis of a d-q coordinate system. A d-axis non-interactive control section removes, from the d-axis voltage command, an interference component resulting from a current on a q axis of the system. A first current deviation arithmetic section obtains a deviation between a current command on the q axis and the current on the q axis flowing through the AC motor. A q-axis integral control section outputs an integral value of the deviation. A q-axis voltage command section generates a q-axis voltage command based on the deviation. A constant output control section outputs a correction voltage command based on the integral value. A d-axis voltage command correction section subtracts the correction voltage command from the d-axis voltage command after non-interactive control to correct the d-axis voltage command.

Abstract: A second q-axis current command value, which is set by a q-axis current command value setting unit when an alternating-current power source fails at the time of driving of a synchronous motor, and a second d-axis current command value, which is set by a d-axis current command value setting unit when the alternating-current power source fails at the time of the driving of the synchronous motor, are set so that an absolute value of power per unit time of the synchronous motor is equal to loss per unit time of the synchronous motor.

Abstract: A current estimation section of a motor control apparatus carries out the following processing. When an AC motor is controlled under a current feedback control scheme (sine wave control mode or overmodulation control mode), a ?-axis current i? is calculated based on a current detection value iw_sns in a sensor phase and a current command value iv* in one other phase. When the AC motor is controlled under a torque feedback control scheme (rectangular wave control mode), the ?-axis current i? is calculated based on a differential value ?i? of an ?-axis current. Then a sensor phase reference current phase ?x is calculated to estimate a U-phase current. Thus it is possible to use the current feedback control scheme and the torque feedback control scheme together.

Abstract: A method for controlling a motor by an inverter and by a vectorial technique, comprising the following steps: determining the value of a quadrature current Iq necessary for said motor to generate the desired torque; calculating the value of a direct current to be supplied to the motor by an equation as a function of the phase of the current vector on which the torque constant of the motor depends; calculating the power current of said motor from the direct current and the quadrature current; supplying the power current to the motor through the inverter.

Abstract: An electric power steering apparatus detects, as an abnormal phase, a phase other than a combination of phases whose interphase voltage is of nearly zero volts if a q-axis current is equal to or smaller than a first threshold value though a q-axis voltage is being applied. Alternatively, the electric power steering apparatus calculates a base electric angle at which the q-axis current is equal to or smaller than a third threshold value though the q-axis voltage is being applied, and determines an abnormal phase based on the base electric angle.

Abstract: A motor driving device comprises: an inverter having a plurality of switching elements for driving a motor; an arithmetic section for calculating a rotational speed and a magnetic pole electric angle of a motor rotor based on information about a motor phase voltage and information about a motor phase current; a delay correcting section for correcting a phase delay of the magnetic pole electric angle calculated by the arithmetic section so as to generate corrected magnetic pole electric angle; a driving command generating section for generating a sinusoidal wave driving command based on a difference between the rotational speed and a target rotational speed and the corrected magnetic pole electric angle; and a PWM signal generating section for generating a PWM control signal for controlling on/off of the plurality of switching elements based on the sinusoidal wave driving command.

Abstract: A periodic disturbance observer determines real part I^An and imaginary part I^Bn of an estimated current including a periodic disturbance, from value of identification identifying a system transfer function of an nth order torque ripple frequency component from a command torque to a detected torque value, with a one-dimensional complex vector having a real part P^An and an imaginary part P^Bn, a cosine coefficient TAn, a sine coefficient TBn, and the real part P^An and imaginary part P^Bn of the system transfer function; subtracts command compensating current IAn* and IBn* obtained through pulsation extracting filter GF, respectively, from the real part I^An and imaginary part I^Bn of the estimated current, and thereby determines estimated periodic disturbance current real part dI^An and imaginary part dI^Bn to cancel the periodic disturbance current.

Abstract: An inverter device provided on a washing machine for controlling a permanent magnet motor being provided with a rotor magnet including a first permanent magnet and a second permanent magnet having a level of coercivity smaller than the first permanent magnet. An excitation current is produced to vary the amount of magnetism of the second permanent magnet to execute a dehydrate operation with a magnetic flux of the rotor magnet reduced and to execute an operation being specified to operate at a lower maximum rotation count compared to the dehydrate operation with the magnetic flux of the rotor magnet increased. When the amount of magnetism of the second permanent magnet is varied while rotation of the permanent magnet motor is stopped, a phase of the excitation current for varying the amount of magnetism is switched depending on a rotation stop position of the rotor.

Abstract: A method is for controlling a synchronous motor includes a stator, a rotor with a position and a speed, a direct axis and a quadrant axis. The method includes: providing a position control, a speed control and a current control programs; executing either the position control program or the speed control program to produce a quadrant axis current; executing the current control program; detecting the synchronous motor to obtain a first, a second and a third phase currents, and digitizing the three phase currents; using the three phase currents and the quadrant axis current to calculate a direct axis current; converting the direct axis current and quadrant axis current to a direct axis voltage command and quadrant axis voltage command; executing a pulse width modulation for the direct axis and the quadrant axis voltage commands, to get a trigger signal for controlling the synchronous motor.

Abstract: A motor control device that performs vector control to control a q-axis current and a d-axis current of a permanent magnet synchronous motor independent from each other. The motor control device includes a q-axis current and d-axis current detection unit configured to detect a q-axis current and a d-axis current of a permanent magnet synchronous motor, a q-axis current command value generation unit configured to generate a q-axis current command value, a d-axis current command value generation unit configured to generate a d-axis current command value, in which an amount of rise in the temperature of permanent magnets in a steady state of the permanent magnet synchronous motor is a minimum, and a drive unit configured to drive the permanent magnet synchronous motor.

Abstract: A current control module generates a voltage request based on a d-axis current (Idr) demand. A switching control module controls a motor based on the voltage request and generates an out-of-volts (OOV) signal based on a comparison of the voltage request and an available voltage. An Idr injection module generates the Idr demand based on a direct current (DC) bus voltage, a rotational speed, and a demanded torque and selectively applies a first adjustment to the Idr demand. The Idr injection module identifies whether an improvement resulted from the first adjustment, wherein the improvement is identified based on at least one of (i) a measured current of the motor and (ii) the OOV signal. The Idr injection module selectively applies a second adjustment to the Idr demand based on whether the improvement is identified.

Abstract: A control system for an actuator including a straight slot direct current motor comprises a position sensor for measuring the angular position (?) of the motor and a current sensor for measuring the current strength (Im) in the motor, but not having a sensor for measuring the angular rotation speed of the motor.

Abstract: A control device for a three-phase alternate current motor, includes: a control phase current acquisition means; a monitor phase current acquisition means; a rotation angle acquisition means; a two-phase control current value current calculation means; a one-phase current estimated value estimation means; a voltage command value calculation means; an other phase current estimation means for calculating a monitor or a control phase current estimated value; an abnormality detection means for detecting an abnormality in a monitor phase or a control phase current sensor; and a switching means for switching between a monitoring stop mode, in which the voltage command value is calculated based on the two-phase control current value, and a monitoring mode, in which the voltage command value is calculated based on the one-phase current estimated value, and the abnormality detection means detects the abnormality, at predetermined time intervals.

Abstract: A current command value computation section 22 is provided with a q-axis current command value correction section 31 and an expected voltage utilization factor computation section 32. The expected voltage utilization factor computation section 32 estimates an expected voltage utilization factor f based on a rotational angular velocity ? of a motor 12, a q-axis current command value Iq*, and a power voltage Vb (the maximum voltage Vmax). The expected voltage utilization factor f is the ratio of required output voltage to the maximum voltage Vmax applicable to a drive circuit 18. Based on the expected voltage utilization factor f, the q-axis current command value correction section 31 corrects the q-axis current command value Iq* such that the corrected expected voltage utilization factor f does not exceed a predetermined value that corresponds to the voltage saturation limit.

Abstract: A control device controls a power conversion circuit so as to adjust control values of a motor generator to optimum values. The power conversion circuit has switching elements for selectively connecting and disconnecting a battery and terminals of the motor generator. The control device sets a simulated voltage vector V(n+1) in one control-period forward to perform a prediction model control. On predicting a current, the control device uses a model in a rotary coordinate system, and sets the median value of the voltage vector V(n+1) in one control-period Tc to a value of the voltage vector V(n+1) in the rotary coordinate system. The control device sets, as the value of the voltage vector V(n+1) in the rotary coordinate system, the voltage vector V(n+1) when the half-time of the control-period Tc is elapsed from the time at the electric angle ?(n+1).

Abstract: A storage section stores, as stored current values, currents flowing when a voltage application section applies voltage vectors to a three-phase rotary machine. A position estimation section estimates the rotor position of the rotary machine in a stopped state based on the stored current values. An adjustment section adjusts a minimum necessary application time that allows the rotary machine to be magnetically saturated by voltage vector application, to enable rotor position estimation. Further, the adjustment section uses, as an adjustment evaluation value, the magnitude |?Y| of differential admittance obtained by dividing a summed current value calculated from the stored current values by the voltage amplitude value of the voltage vector instruction when the voltage vector based on the voltage vector instruction is applied with the application time being set at an arbitrary application time, and adjusts the application time based on |?Y|.

Abstract: An observer (404), operating during a time when open loop control (402) is being used to drive a synchronous motor (401), the output of the observer (404) being a signal, E_I_angle, related to the angle between a rotational EMF vector and the current excitation vector, the observer (404) determining the angle by an iterative calculation incorporating a summation term, the summation term summing the variation of the quadrature component of a rotational EMF vector relative to an estimated EMF position vector, and using the angle output of the observer to update the estimate of the rotational EMF position vector. In a further aspect of the invention the observer output signal, E_I_angle, can be used to determine the transition to closed loop control (405), when the observer output signal reaches a value indicating conditions close to pull out conditions.

Abstract: A motor control device for driving a brushless motor includes a current detecting unit which detects respective phase currents which flow into the brushless motor; a control calculation unit which calculates instruction values showing respective phase voltages to be applied to the brushless motor, and outputs the instruction values as phase voltage instruction values; a phase resistance calculation unit which calculates respective phase resistance values based on detection values of the respective phase currents detected by the current detecting unit, and the instruction values of the respective phase voltages applied to the brushless motor at the time of the detection of the detection values; a correction unit which corrects the phase voltage instruction values according to the respective phase resistance values calculated by the phase resistance calculation unit; and a driving unit which drives the brushless motor based on the phase voltage instruction values after correction by the correction unit.

Abstract: A rotating electrical machine system includes a stator that has stator windings of a plurality of phases, and that generates a stator magnetomotive force in accordance with stator current of different phases, which is supplied to the stator windings of the plurality of phases; a rotor on which rotor windings are wound such that rotor current is generated in accordance with the stator magnetomotive force generated by the stator and a magnetic pole is formed by the rotor current; and a control unit that controls an output torque from the rotor, by controlling the stator current. In a case where a predetermined torque is output from the rotor, the control unit applies a pulse to the stator current so as to increase the stator current and reduce the rotor current, when a temperature of the rotor is high as compared with when the temperature of the rotor is low.

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.

Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. In response to a torque request, a controller issues commands to an inverter calculated to cause the motor to produce the requested torque at the current temperature. A method adjusts the direct component of the winding current such that the requested torque is delivered efficiently. For a given rotor speed, bus voltage, and torque, the direct component increases as the temperature increases.

Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. In response to a torque request, a controller issues commands to an inverter calculated to cause the motor to produce the requested torque. A method of operating the inverter may determine the commands based on the ratio of rotor speed to inverter input voltage, reducing the approximation error associated with multi-dimensional lookup tables. When the speed and voltage vary while maintaining a constant ratio and constant torque request, the issued commands produce a winding current in the electrical machine with constant direct and quadrature components.

Abstract: An angle detection apparatus for a rotor of a motor includes a period counter, a step period generator, and an angle generator. The period counter receives a rotor sensing signal, and calculates a plurality of time ranges of a plurality of pulses of the rotor sensing signal. The step period generator generates a ratio value and an error signal according to an average time range value of the time ranges and a set value. The step period generator further adjusts the ratio value according to the error signal, and generates a step time according to the adjusted ratio value and the average time range value. The angle generator receives the step time and the rotor sensing signal, and obtains an angle detection result according to the rotor sensing signal and the step time.