The inverter is a high-performance closed-loop vector inverter (shown in Figure 2 below) with three control modes of V / F, PG-free vector and PG vector. In the case of sudden load reduction, the speed fluctuation is very high Slight; support for permanent magnet synchronous motor, inverter motor, direct drive motor, etc., can reduce inventory for users, no longer need to spare different inverters for different motor inventory; with accurate motor parameter self-learning function, Learning and static self-learning, static self-learning can learn the motor parameters accurately when the motor can not be separated from the load; advanced three-phase modulation of the entire process to make the motor run more smoothly and less noise; other characteristic parameters, The function is shown in the following table: