High voltage brushless DC motor driver

The present invention discloses a high voltage brushless DC motor driver. The high voltage brushless DC motor driver is characterized in that a phase-change switch signal generating circuit generates three phases and six switch signals, then a phase inverter is connected with each phase of the phase-change switch signal generating circuit, and then the optocoupler circuits are connected with the phase inverters used for buffer respectively and are used to isolate the phase-change switch signal generating circuit and the drive circuits. Finally the drive circuits receive the switch signals transmitted back from the optocoupler circuits to generate the driving signals of which the powers and the voltages are amplified. According to the present invention, the isolation points are selected at the input ends of the drive circuits without needing a conventional isolative power supply module, and the devices, such as the optocoupler circuits, the driving chips, etc., are reduced by 50% by being compared with the prior art, the production cost is saved, at the same time, the occupied space of the internal circuits of the driver is reduced, thereby realizing the miniaturization of the driver.