A dual-mode winding motor drive system based on operating conditions

Abstract

The invention relates to the technical field of permanent magnet brushless motor control, and discloses a dual-mode winding motor drive system based on operating conditions, comprising a pair of standard two-level inverters, a permanent magnet brushless motor with an open winding structure, a position Speed ​​sensor, controller, current detection module, voltage detection module and DC power supply U dc , a pair of standard two-level inverters are three-arm structure, and also include solid-state relay group, relay drive module, open winding structure permanent magnet brushless motor 6 terminals are respectively connected to a pair of standard two-level inverters The output end of the three bridge arms of the device; the solid state relay group is respectively connected between the 6 terminals of the permanent magnet brushless motor with open winding structure. The invention uses the solid state relay group to automatically switch the motor windings in two modes according to the motor operating conditions, and has the advantages of the traditional single-inverter drive system and the open-winding dual-inverter drive system, and improves the performance of the motor drive system.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motor control, in particular to a dual-mode winding motor drive system based on operating conditions. Background technique [0002] Permanent magnet brushless motors have the advantages of small size, high power density, easy maintenance and strong environmental adaptability, and are widely used in many high-performance drive fields. As one of the key executive components of hybrid electric vehicles and electric vehicles, the driving performance of vehicle drive motors directly affects the vehicle performance of hybrid electric vehicles and electric vehicles. [0003] With the higher and higher requirements for the running performance of electric vehicles, the speed regulation range and power required by the motor drive system continue to increase. For the vehicle motor drive system, the terminal voltage is limited by the capacity and voltage level of the vehicle battery, which restricts...

AI Technical Summary

Problems solved by technology

However, the winding switching technology used in this scheme requires the motor to divide the stator winding into two sets of series windings during the processing process, and set the middle tap in the two sets of series windings, which is not suitable for the existing traditional three-phase motor; when only one set of windings is running At this time, half of the windings of the motor are in an idle state, which affects the torque output capability of the system; and it adds two additional controllable switching devices, a three-phase full-wave rectifier bridge and a power switch tube in terms of hardware, which increases the power of the switching device. Using quantity, improves the switching device failure rate

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