5KW-level permanent magnet synchronous motor driving circuit based on MOSFET

Abstract

The invention belongs to a servo motor driving circuit, and specifically discloses a 5KW-level permanent magnet synchronous motor driving circuit based on an MOSFET. The output end of a power circuit is communicated with the input ends of an EMI filtering circuit and a busbar surge absorption circuit respectively; the output end of the EMI filtering circuit is communicated with the input end of a power conversion circuit; the output end of the power conversion circuit is communicated with the power input end of a driving circuit; the control signal input end of the driving circuit is communicated with the output end of a DSP control module; the output end of the driving circuit is communicated with the input end of a three-phase full-bridge circuit; the output end of the three-phase full-bridge circuit is communicated with the input end of a current detection circuit; the output end of the current detection circuit is communicated with the input end of a control permanent magnet synchronous motor; the feedback end of a current detection circuit is communicated with the feedback end of the DSP control module; the output end of the busbar surge absorption circuit is communicated with the input end of the three-phase full-bridge circuit. The 5KW-level permanent magnet synchronous motor driving circuit has the advantages of high-power density, high integration degree and high reliability.

Description

technical field [0001] The invention belongs to a servo motor drive circuit, in particular to a high-integration, miniaturized, high-reliability, all-digital high-power high-voltage isolation drive circuit. Background technique [0002] Commonly used permanent magnet synchronous servo motor drive circuits are mostly assembled with discrete components. The resistors, capacitors, full-bridge drive circuits, MOSFET tubes, etc. used are all plastic-encapsulated circuits, and the temperature grade is mostly -40°~+85°. Traditional discrete power electronic converters have many interconnection leads between power devices, and have disadvantages such as complex structure, large parasitic inductance, large volume, and poor reliability. They cannot meet user requirements in applications where the operating environment is harsh and the overall requirements are high. [0003] Therefore, it is necessary to design a permanent magnet synchronous servo motor drive circuit that is modular, i...

AI Technical Summary

Problems solved by technology

[0004] The modularization of power circuits can overcome the shortcomings of traditional discrete power electronic converters, such as many interconnection leads, complex structures, and large parasitic inductance, and achieve high power density and high reliability requirements of the system

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