Harmonic current suppression method and device of permanent-magnet synchronous motor
The invention provides a harmonic current suppression method and device of a permanent-magnet synchronous motor. The method comprises the steps of obtaining d-axis current deviation and/or q-axis current deviation of to-be-suppressed harmonic current; and extracting a to-be-suppressed harmonic curre...
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| creator | LI LERONG HUANG CIMEI LIU WEI XIA ZHULIANG LIAO ZHANTU ZHAO XIAOKUN |
| description | The invention provides a harmonic current suppression method and device of a permanent-magnet synchronous motor. The method comprises the steps of obtaining d-axis current deviation and/or q-axis current deviation of to-be-suppressed harmonic current; and extracting a to-be-suppressed harmonic current signal by using a fourier analysis method, then carrying out filtering and superposition, simultaneously carrying out angle compensation on an electrical angle of the motor and carrying out signal reconstruction by the electric angle and the harmonic current signal to obtain output of a repetitive controller; the repetitive controller and a PI controller form an overall current controller to act on vector control of the permanent-magnet synchronous motor. The harmonic current suppression method is simple in logic, only simple repetition is needed when different harmonic current is suppressed, and the size of the harmonic current can be well suppressed, thereby achieving the targets of suppressing torque pulsatio |
| format | Patent |
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The method comprises the steps of obtaining d-axis current deviation and/or q-axis current deviation of to-be-suppressed harmonic current; and extracting a to-be-suppressed harmonic current signal by using a fourier analysis method, then carrying out filtering and superposition, simultaneously carrying out angle compensation on an electrical angle of the motor and carrying out signal reconstruction by the electric angle and the harmonic current signal to obtain output of a repetitive controller; the repetitive controller and a PI controller form an overall current controller to act on vector control of the permanent-magnet synchronous motor. 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The method comprises the steps of obtaining d-axis current deviation and/or q-axis current deviation of to-be-suppressed harmonic current; and extracting a to-be-suppressed harmonic current signal by using a fourier analysis method, then carrying out filtering and superposition, simultaneously carrying out angle compensation on an electrical angle of the motor and carrying out signal reconstruction by the electric angle and the harmonic current signal to obtain output of a repetitive controller; the repetitive controller and a PI controller form an overall current controller to act on vector control of the permanent-magnet synchronous motor. The harmonic current suppression method is simple in logic, only simple repetition is needed when different harmonic current is suppressed, and the size of the harmonic current can be well suppressed, thereby achieving the targets of suppressing torque pulsatio</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION |
| title | Harmonic current suppression method and device of permanent-magnet synchronous motor |
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