High-speed doubly salient starter generator controller and control method thereof

Abstract

The invention provides a high-speed doubly salient starter generator controller and a control method thereof. The high-speed doubly salient starter generator controller is characterized by comprisinga generator, a generator controller, a three-phase full-bridge circuit, a phase current comparison circuit, an exciting current control circuit, an FPGA control circuit, a DSP control circuit and an output capacitor C. According to a three-phase full-bridge topology of SiC MOS, hardware multiplexing of starting and power generation is realized, and compared with the three-phase full-bridge topology of a Si IGBT device, the three-phase full-bridge topology of SiC MOS overcomes the defect that the IGBT conduction voltage drop cannot be lower than a certain fixed value when a switching tube is conducted, so that the conduction loss is reduced; according to the FPGA duty ratio controlled three-phase current comparison circuit, the circuit is simple and easy to implement; and a novel phase sequence detection and zero calibration method of an electro-magnetic doubly salient motor is simpler and more efficient than a method of dragging the electro-magnetic doubly salient motor and then judging a phase sequence and a zero position through armature voltage.

Description

technical field [0001] The invention relates to a controller and a control method for a high-speed electric excitation double salient starter generator. Background technique [0002] The starter generator controller is used to drive the starter generator to work. In the starting stage, the starter generator is used as a motor, and the energy flows from the starter generator controller to the starter generator, driving the engine from rest to ignition speed, and boosting after ignition engine. In the power generation stage, the starter generator is used as a generator, the engine inputs mechanical energy to the generator, the generator converts the mechanical energy into variable voltage AC power, and the starter generator controller converts the variable voltage AC power into regulated DC power output. The starter-generator system composed of the starter-generator controller and the starter-generator has two-way energy flow, and has two functions of starting and generating,...

AI Technical Summary

Problems solved by technology

[0009] The main disadvantage of solution 1) is that the armature current ripple of the high-speed starter generator is large when starting, and the starting / generating hardware is not reused, resulting in a large volume and weight of the controller

Solution 2) Although it solves the problem of solution 1) that the armature current ripple of the high-speed starter generator is large when starting, the hardware is more complicated

The main disadvantage of scheme 3) is that the upper limit frequency of Si IGBT is limited, and the armature current ripple of high-speed starter generator is large when starting; when high-speed power generation, the turn-on voltage drop of the integrated fast recovery diode is high and the reverse recovery cannot be ignored, resulting in Higher conduction loss and reverse recovery loss

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