该系统包含升压和逆变两个环节，均采用电压外环、电流内环的双环pwm控制方式。
The two parts both adopt double loop PWM control mode which consists of outer voltage loop and inner current loop.
该系统包含升压和逆变两个环节，均采用电压外环、电流内环的双环pwm控制方式。
The two parts both adopt double loop PWM control mode which consists of outer voltage loop and inner current loop.
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