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111.发明申请公开(公告)号：US20210226565A1
公开(公告)日：2021-07-22
申请号：US17153111
申请日：2021-01-20
发明人： Torben JONSKY
摘要： A method ascertains current-dependent inductances of a polyphase electrical machine. The method generates phase voltages for the polyphase electrical machine by means of a pulse width modulation such that currents of predefined current level flow through stator windings of the electrical machine. During a number of cycles of the pulse width modulation, the method generates a voltage pulse such that a change of current is brought about in a torque-forming axis of the polyphase electrical machine and/or in a field-forming axis of the polyphase electrical machine. The method measures the change of current, and ascertains the current-dependent inductances on the basis of the change of current.
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公开(公告)号：US10992243B2
公开(公告)日：2021-04-27
申请号：US16743013
申请日：2020-01-15
摘要： A system and computer-implemented method for reducing an angle error in an estimated position of a rotor over various loads on an electric motor or type of electric motor. Electrical parameters of an electric motor are measured, a true rotor position is found, and sensorless gains based on the measured parameters are generated, including determining a sensorless angle. Data is gathered at multiple torque levels for at least one speed of the motor, including for each torque level, trying different inductance values, and determining an inductance value that results in an angle error of zero. The angle error is the difference between the true rotor position and the sensorless angle. The inductance value that results in an angle error of zero for each speed may be saved in an electronic memory and used to better control the motor or other motors of the same type.
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公开(公告)号：US10992242B2
公开(公告)日：2021-04-27
申请号：US15842082
申请日：2017-12-14
申请人： Minebea Mitsumi Inc.
发明人： Hiroaki Murakami
摘要： A motor driving control device includes an induced voltage detecting unit configured to detect an induced voltage of a motor, a controller for generating a PWM signal, and an inverter circuit for outputting a driving signal to the motor based on the PWM signal. The controller is configured to detect a position detection signal, to measure a zero-cross point of the induced voltage of the motor based on a detected timing of an edge of the position detection signal, to stop output of the driving signal only for a predetermined period containing the zero-cross point of the induced voltage, to measure a pulse width of a regenerated voltage in the period, to calculate a zero-cross point of coil current based on the measurement result, and to adjust the energization timing based on the calculation result. The predetermined period is a period of one cycle of the PWM signal.
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114.发明授权公开(公告)号：US10756655B2
公开(公告)日：2020-08-25
申请号：US16356975
申请日：2019-03-18
发明人： Sung Hoon Bang
摘要： A method of operating a resolver management device according to the present invention includes: generating an excitation signal by using an external control signal; counting a time interval (a first delay time) to a first pole of the excitation signal based on one period of the external control signal by using an internal clock; receiving an excitation signal reflected from a resolver sensor; counting a time interval (a second delay time) to a second pole of the reflected excitation signal at the first pole by using the internal clock; and transmitting a first count value corresponding to the first delay time and a second count value corresponding to the second delay time to a microcontroller unit (MCU).
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公开(公告)号：US10666182B1
公开(公告)日：2020-05-26
申请号：US15947540
申请日：2018-04-06
申请人： Caterpillar Inc.
发明人： Carlos E. Nino Baron , Ahmed Khalil , Jackson Wai , Jesse R. Gerdes , Sangameshwar Sonth , Amir Saad
摘要： A control system for a rotary electric machine includes a controller configured to generate dynamic input current data based upon a dynamic analysis of self flux data, mutual flux data, and saturation scaling factor data. Upon generating a torque request, the controller is configured to determine a desired electrical input based upon the dynamic input current data to generate the desired output torque. The desired electrical input includes a magnitude and duration of an electrical pulse and a desired angular position of the rotor of the rotary electric machine relative to the stator of the machine. The controller determines an angular position of the rotor and generates an operating command to generate the desired electrical input at the desired angular position of the rotor to propel the rotary electric machine and generate the desired output torque. A rotary electric machine and method of operating same are provided.
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公开(公告)号：US20200153370A1
公开(公告)日：2020-05-14
申请号：US16743013
申请日：2020-01-15
摘要： A system and computer-implemented method for reducing an angle error in an estimated position of a rotor over various loads on an electric motor or type of electric motor. Electrical parameters of an electric motor are measured, a true rotor position is found, and sensorless gains based on the measured parameters are generated, including determining a sensorless angle. Data is gathered at multiple torque levels for at least one speed of the motor, including for each torque level, trying different inductance values, and determining an inductance value that results in an angle error of zero. The angle error is the difference between the true rotor position and the sensorless angle. The inductance value that results in an angle error of zero for each speed may be saved in an electronic memory and used to better control the motor or other motors of the same type.
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公开(公告)号：US20200127587A1
公开(公告)日：2020-04-23
申请号：US16163014
申请日：2018-10-17
摘要： A controller circuit for a brushless direct current (BLDC) motor may be configured to estimate a rotor position of the BLDC motor and apply a constant start-up voltage to a stator winding of the BLDC motor using the estimated rotor position until a current at the stator winding corresponds to a local minimum current. The controller circuit may be further configured to, in response to the current at the stator winding corresponding to the local minimum current, allow commutation of the current at the stator winding, calculate the rotor position in response to allowing the commutation of the current at the stator winding, and commutate the current at the stator winding using the calculated rotor position.
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118.发明申请公开(公告)号：US20190288619A1
公开(公告)日：2019-09-19
申请号：US16356975
申请日：2019-03-18
发明人： Sung Hoon BANG
摘要： A method of operating a resolver management device according to the present invention includes: generating an excitation signal by using an external control signal; counting a time interval (a first delay time) to a first pole of the excitation signal based on one period of the external control signal by using an internal clock; receiving an excitation signal reflected from a resolver sensor; counting a time interval (a second delay time) to a second pole of the reflected excitation signal at the first pole by using the internal clock; and transmitting a first count value corresponding to the first delay time and a second count value corresponding to the second delay time to a microcontroller unit (MCU).
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119.发明申请公开(公告)号：US20190280631A1
公开(公告)日：2019-09-12
申请号：US16336241
申请日：2017-11-21
摘要： A circuit, comprising a plurality of phase windings in an electric motor, an inverter configured to excite the phase windings by a sequence of voltage pulses including a plurality of successive voltage pulses that a current can be set in each of the phase windings, wherein the voltage pulses are selected in such a manner that a positive and a negative current are produced in all the phase windings during the voltage pulses, a current sensor for measuring a peak value for the current being set during a duration of each voltage pulse in each phase winding, and an evaluation circuit connected to the current sensor, wherein the evaluation circuit is configured to determine the voltage pulse in the voltage pulse sequence during a duration of which peak current value having a greatest magnitude was measured.
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公开(公告)号：US10381964B2
公开(公告)日：2019-08-13
申请号：US15890622
申请日：2018-02-07
申请人： Minebea Mitsumi Inc.
发明人： Masato Aoki
摘要： There is provided a motor driving control device and a motor driving control method capable of quickly activating a motor. The motor driving control device comprises a motor driving unit, a control circuit unit and a position detector. The motor driving unit selectively energizes coils Lu, Lv, Lw of a plurality of phases of the motor. The control circuit unit outputs a driving control signal C1 to the motor driving unit to switch, in a predetermined order, an energization phase of the coils Lu, Lv, Lw of the plurality of phases to be energized by the motor driving unit. The position detector outputs a position signal corresponding to a position of a rotor of the motor. The control circuit unit adjusts the energization phase based on the position signal when the motor is activated, thereby matching variation timing of a phase of the position signal and the energization phase with each other, and outputs the driving control signal C1 according to a period of the position signal after the activation of the motor.
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