Inverter Model Analysis and Dead Time Compensation Control Strategy Research
According to the inverter structure model of the motor drive system,the switching devices and output characteristics in the inverter are considered to suppress the dead-time effect and improve the in-verter.Taking the output current of the inverter as the target,the dead-time compensation control algo-rithm of the voltage source inverter is analyzed and obtained.According to the characteristic that the elec-tromagnetic response of the motor is far ahead of the mechanical response,the method considers the influ-ence of the dead time,establishes the dynamic equation of the voltage under the dq axis of the motor,and establishes the relationship between the variation of the stator induced electromotive force and the change of the dq axis current,so as to calculate the dead zone disturbance.The simulation results show that the proposed method can effectively reduce the harmonic distortion rate of the motor phase current,improve the sine of the current waveform,and suppress the electromagnetic torque ripple,thereby improving the current control performance of the system.
voltage source inverterdead time effectpermanent magnet synchronous motordead time compensation
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维普
