Motor control system having common-mode voltage compensation
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-006/00
H02P-023/00
H02P-021/00
출원번호
US-0833354
(2013-03-15)
등록번호
US-9263982
(2016-02-16)
발명자
/ 주소
Gebregergis, Abraham G.
RajaVenkitasubramony, Ramakrishnan
Sebastian, Tomy
Veigas, Santhosh J.
Lietzke, Vaughn E.
출원인 / 주소
Steering Solutions IP Holding Corporation
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
A motor control system is provided, and includes a motor, at least one differential amplifier configured to monitor phase current applied to the motor, and a current compensation controller. The current compensation controller is in communication with the at least one differential amplifier, and is
A motor control system is provided, and includes a motor, at least one differential amplifier configured to monitor phase current applied to the motor, and a current compensation controller. The current compensation controller is in communication with the at least one differential amplifier, and is configured to periodically determine a common-mode voltage of the at least one differential amplifier. The current compensation controller is also configured to determine a corrected phase current value based on the common mode voltage.
대표청구항▼
1. A motor control system, comprising: a motor;at least one differential amplifier configured to monitor phase current applied to the motor;a current compensation controller in communication with the at least one differential amplifier, the current compensation controller configured to: periodically
1. A motor control system, comprising: a motor;at least one differential amplifier configured to monitor phase current applied to the motor;a current compensation controller in communication with the at least one differential amplifier, the current compensation controller configured to: periodically determine a common-mode voltage of the at least one differential amplifier, the common-mode voltage is determined by: VCM—VOLTAGE=[GCM*(Vecu*Di−Vecu, calTime*duty10%)]+VCM(10% DutyCycle) where VCM—VOLTAGE represents the common-mode voltage, GCM is a gain common-mode value, Vecu is an instantaneous bridge voltage, Di is an instantaneous duty cycle, Vecu,calTime is a bridge voltage during end-of-line calibration, duty10% represents a 10% duty cycle during end-of-line calibration, and VCM(10% DutyCycle) represents the common-mode voltage during end-of-line calibration at 10% duty cycle; anddetermine a corrected phase current value based on the common mode voltage. 2. A motor control system, comprising: a motor;at least one differential amplifier configured to monitor phase current applied to the motor;a current compensation controller in communication with the at least one differential amplifier, the current compensation controller configured to: periodically determine a common-mode voltage of the at least one differential amplifier, the corrected the phase current value is determined by: ICORRECTED=(ADCmtr—curr—volts−VCM—Voltage)*GainAmps—per—Volt where ICORRECTED is either the corrected a-axis phase current value IA—CORRECTED or the corrected b-axis phase current value IB—CORRECTED, ADCmtr—curt—volts represents the phase current monitored by the differential amplifier, and GainAmp—per—volt is a gain parameter; anddetermine a corrected phase current value based on the common mode voltage. 3. A method of controlling a motor, comprising: periodically determining a common-mode voltage of at least one differential amplifier by a current compensation controller, at least one differential amplifier configured to monitor phase current applied to the motor, the common-mode voltage is determined by: VCM—VOLTAGE=[GCM*(Vecu*Di−Vecu, calTime*duty10%)]+VCM(10% Dutycycle) where VCM—VOLTAGE represents the common-mode voltage, GCM is a gain common-mode value, Vecu is an instantaneous bridge voltage, Di is an instantaneous duty cycle, Vecu,calTime is a bridge voltage during end-of-line calibration, duty10% represents a 10% duty cycle during end-of-line calibration, and VCM(10% DutyCycle) represents the common-mode voltage during end-of-line calibration at 10% duty cycle; anddetermining a corrected phase current value based on the common mode voltage by the current compensation controller. 4. A method of controlling a motor, comprising: periodically determining a common-mode voltage of at least one differential amplifier by a current compensation controller, at least one differential amplifier configured to monitor phase current applied to the motor, the corrected the phase current value is determined by: ICORRECTED=(ADCmtr—curr—volts−VCM—Voltage)*GainAmps—per—Volt where ICORRECTED is either the corrected a-axis phase current value IA—CORRECTED or the corrected b-axis phase current value IB—CORRECTED, ADCmtr—curr—volts represents the phase current monitored by the differential amplifier, and GainAmp—per—volt is a gain parameter; anddetermining a corrected phase current value based on the common mode voltage by the current compensation controller.
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