Motor controller having driving, charging and discharging functions

Abstract

The invention discloses a motor controller having driving, charging and discharging functions. The motor controller comprises a DC-DC bidirectional converter, a three-phase bridge type DC-AC bidirectional converter, a driving-charging mode switching device, an alternating current power supply input interface device and a central control microprocessor, wherein a charging battery, the DC-DC bidirectional converter, the three-phase bridge type DC-AC bidirectional converter and a motor are sequentially connected to form a motor driving loop, the alternating current power supply input interface device, the three-phase bridge type DC-AC bidirectional converter, the DC-DC bidirectional converter and the charging battery are sequentially connected to form a battery charging loop, the central control microprocessor controls the DC-DC bidirectional converter and the three-phase bridge type DC-AC bidirectional converter and utilizes the driving-charging mode switching device to enable the motor driving loop to be in a working state and accordingly enable the battery charging loop to be disconnected or enable the motor driving loop to be disconnected and enable the battery charging loop to be in a working state. The motor controller is simple in circuit structure, reliable in work, low in cost, light in weight, small in size and high in power factor, and electronic elements and devices 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 / step-down inductors are added, which are bulky and cumbersome; 2. Two additional DCDC step-up and step-down 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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