High-voltage permanent magnet variable frequency motor all-in-one machine based on low-voltage module series connection

The invention discloses a high-voltage permanent magnet variable frequency motor all-in-one machine based on low-voltage module series connection. The all-in-one machine comprises a permanent magnet synchronous motor, wherein a frequency converter connected through a flange is arranged above the permanent magnet synchronous motor; the frequency converter is integrally internally provided with a plurality of cavities; the cavities comprise power supply wiring cavities and input electric reactor wiring cavities; a main control unit, a rectifier device, a capacitor energy storage module and an inverter power unit which can realize vector control of the permanent magnet synchronous motor are contained inside each cavity; the permanent magnet synchronous motor is a permanent magnet synchronousmotor provided with multiphase independent coil windings. According to the all-in-one machine, heat dissipation is carried out by using a water-cooling radiator, and a water cooling plate of the radiator is made from a novel