Driving control system and control method thereof based on dual-power supply open-type winding permanent magnet synchronous motor

Abstract

The invention discloses a driving control system and a control method thereof based on a dual-power supply open-type winding permanent magnet synchronous motor. An open-type winding permanent magnet synchronous motor structure with dual power supplies and dual inverters for power supply is adopted, an electronic switch group is added, a delta winding connection is realized, the structure can be used for a dual-power supply structure of different power types, and voltage of two power supplies can be allowed to be different and change in real time. through torque saturation determination and rotation speed threshold control, automatic switching is realized among a star winding mode, a delta winding mode and a dual-inverter common control mode, and switching loss is reduced. A dual-inverter current hysteresis control algorithm in a low switching frequency mode and a large power differential mode is provided for the dual-inverter common control mode, and effects of realizing multi-level control and providing different dual-power supply energy allocation can be realized.

Description

Technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a drive control system and a control method of a dual-power open-winding permanent magnet synchronous motor based on a dual power supply, which is suitable for electric vehicles. Background technique [0002] With the increasing requirements of energy conservation and environmental protection in today's society, the technical field of electric vehicles with electric motors as the power source has been booming in recent years. Permanent magnet synchronous motors have the advantages of high power density and simple control, and have become the common power source of electric vehicles. Limited by the energy density and durability of current power batteries, pure electric vehicles using power batteries as a single energy source have the disadvantages of low driving range, high cost, and short life, so they are equipped with internal combustion engine range extender and po...

AI Technical Summary

Problems solved by technology

However, the current research on dual-inverter open-winding motors mainly focuses on the zero-sequence current suppression, fault-tolerant control, and space vector modulation of the common DC bus, or proposes control for single dual-power configurations such as batteries with increased capacitance. Method; the existing scheme does not solve the problem of large inverter switching loss in the dual-inverter open-winding motor drive system, nor can it be applied to dual-power drive systems of various power types at the same time

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