Digital isolation type high-power three-phase brushless motor driving module

Abstract

The invention belongs to the field of electromechanical servo driving, and specifically discloses a digital isolation type high-power three-phase brushless motor driving module. The signal output endof an optical coupling isolation unit and the signal output end of an overcurrent protection unit are both connected with the signal input end of a logic unit; the signal output end of the logic unitand the signal output end of the overcurrent protection unit are both connected with the signal input end of an H bridge driving control unit; the signal output end of the H bridge driving control unit is connected with the signal input end of a field effect transistor output unit; the signal output end of the field effect transistor output unit is connected with the signal input end of the overcurrent protection unit and external motor windings U, V and W separately; the optical coupling isolation unit, the logic unit and the H bridge driving control unit are all connected with a working power supply V<cc>; and the overcurrent protection unit and the field effect transistor output unit are both connected with a power power-supply V<s>. The driving module disclosed in the invention is highin reliability, integration, working current and power density, and short in production period.

Description

technical field [0001] The invention belongs to the field of electromechanical servo drive, in particular to a digital isolated high-power three-phase brushless motor drive module. Background technique [0002] The motion control of the brushless DC motor requires the use of a drive circuit to drive the motion of the DC motor. In order to realize the motion of the motor, it usually needs to be driven by a bridge drive circuit. In addition, in order to prevent the motor, power supply or other components from being burned by the high current generated when the motor is locked, an over-current protection design is required. These functions are constructed by using separate components, the circuit structure is relatively complex, and the circuit volume is large, which is difficult to meet the miniaturization requirements of aerospace servo products. At present, the performance of the 1-2Kw drive module is better in the market, and the integrated module of PCB+DBC process is mai...

AI Technical Summary

Problems solved by technology

Using separate components to realize these functions, the circuit structure is relatively complex, and the circuit volume is large, which is difficult to meet the miniaturization requirements of aerospace servo products

At present, the performance of the 1-2Kw drive module is better in the market, and the integrated module of PCB+DBC technology is mainly used, but the price is higher

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