这是一种逆变电路，将直流电压逆变为相位互差120度的三相交流电压，采用svpwm调制算法给逆变主电路提供开关指令-This is an inverter circuit, the DC voltage of the inverter is a three-phase AC voltage phase difference of 120 degrees, using svpwm modulation algorithm provides a switching instruction to the inverter main circuit