Processing enterprises have put forward increasingly high requirements for the performance of industrial sewing machines. At present, industrial sewing machines with permanent magnet synchronous motors as the mainstream power unit are rapidly occupying most of the market. Compared with traditional clutch motors, permanent magnet synchronous motors have advantages such as small size, good dynamic performance, convenient control, and high power density. The application of industrial sewing machines mainly includes two functional parts: "single-phase/three-phase inverter" and "rectifier output". The single-phase/three-phase inverter part: high-voltage MOS, and the rectifier output part: fast recovery diode FRD

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