Motor controller with integrated drive and charge/discharge functions

Abstract

A motor controller integrated with drive, charging and discharging functions, comprising: a bidirectional DC-DC converter, a three-phase bridge DC-AC bidirectional converter, a drive-charging mode switching device, an AC power supply input interface device and a central control microprocessor, wherein a charging battery (E) is sequentially connected to the bidirectional DC-DC converter, the three-phase bridge DC-AC bidirectional converter and a motor to form a motor drive loop; the AC power supply input interface device, the three-phase bridge DC-AC bidirectional converter, the bidirectional DC-DC converter and the charging battery are sequentially connected to form a battery charging loop; and the central control microprocessor controls the bidirectional DC-DC converter and the three-phase bridge DC-AC bidirectional converter and utilizes the drive-charging mode switching device to cause the motor drive loop to be in an operating state and cause the battery charging loop to be turned off or cause the motor drive loop to be turned off and cause the battery charging loop to be in an operating state. The motor controller is simple in circuit structure, and electronic elements are decreased.

Description

Technical field: [0001] The invention relates to a motor controller integrating driving and charging and discharging functions, in particular to a controller integrating motor driving and single-phase and three-phase charging and discharging functions. Background technique: [0002] 1) At present, the solution of foreign motor controllers integrating drive and charging and discharging functions based on the non-isolated integrated "charging-driving" system has been applied in the automotive industry. The specific plans are: [0003] (1) Parallel Boost non-isolated integrated charger, such as figure 1 , using the motor winding as an inductor combined with a three-phase IGBT converter, which has high requirements for the design of the motor; [0004] (2) Non-isolated integrated charger based on split-phase motor; [0005] (3) Integrated charger based on four-wheel independent drive. What these topologies have in common is the use of contactors to reconfigure the windings o...

AI Technical Summary

Problems solved by technology

In the three-phase charging mode, an additional locking device must be added to the permanent magnet synchronous motor, which is difficult to achieve in terms of control technology;

[0009] (2). Insufficient support for compatible three-phase and single-phase charging methods;

[0012] This technical solution mainly has the following disadvantages: 1. Two additional high-power step-up / down inductors are added, which are bulky and heavy; 2. Two additional DCDC buck-boost bridge arms (high-power IGBT units); 3. , Add three additional high-voltage and high-current relays (high cost); 4, single-phase and three-phase charging interfaces are not compatible

5. Due to the incompatibility of the interface, it cannot automatically judge and adapt to different charging modes

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