Method for controlling boost-buck of motor driving Z-source inverter of electric automobile
A technology of motor drive and source inverter, which is applied in the direction of AC motor control, electric vehicles, motors, etc., can solve the problems of output current distortion, current ripple amplitude increase, and no buck-boost, etc. Effects of small voltage and current stress, reduced through-duty cycle, and reduced ripple current
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[0056] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
[0057] The embodiment of the present invention takes a quasi-Z source inverter to drive an AC motor as an example, such as figure 1 As shown, it includes a quasi-Z-source inverter composed of a battery, a quasi-Z-source impedance network and a three-phase voltage inverter, a motor, an AC motor vector control system and an optimal buck-boost control system; the battery passes through the quasi-Z source After the inverter is converted, it supplies power to the motor. The optimal buck-boost control system collects motor information, generates an optimal buck-boost control signal and transmits it to the AC motor vector control system. The AC motor vector control system is based on the motor information and the optim...
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