A direct-boost non-isolation doubly-fed high-speed switched reluctance generator converter system

Abstract

A direct-boost non-isolated doubly-fed high-speed switched reluctance generator converter system, including batteries, nine switch tubes, three-phase windings, eight diodes, ten capacitors, inductors, transformers, the main circuit for controlling excitation and power generation is The windings of each phase are shared, which simplifies the structure and realizes direct boosting. At the same time, it solves the problem that the power generation output cannot be generated during the excitation stage, and also solves the problem of decoupling the power generation output and the excitation power supply, that is, the power generation output does not depend on the state of the generator but is independent control, which meets the needs of emergency power generation output in extreme cases; the battery can be automatically charged in the forward direction, and can also be fed back when needed in extreme cases, so as to realize double-feeding of phase winding power generation output and reverse power feed of the battery, which enhances power generation System adaptability and power generation efficiency; the whole system has no isolation link, and the overall structure is simple and practical; it is suitable for various types of small and medium power high-speed switched reluctance generator systems driven by various power sources and in different output side states.

Description

technical field [0001] The invention relates to the field of switched reluctance motor systems, in particular to a switched reluctance generator converter system with direct voltage boosting, independent control of power generation, no isolation, double-fed conversion and a control method thereof. Background technique [0002] The structure of the switched reluctance motor is extremely simple, especially there is no winding on the rotor. Compared with the traditional AC and DC motor, it has certain advantages and has a wide application prospect. [0003] As a new type of generator emerging in some fields in recent years, switched reluctance generator has shown very good advantages, especially in the application of high-speed generator systems in some small and medium power applications, as well as in new wind power systems. [0004] In the operation of the switched reluctance generator, the work of each phase of the stator winding is generally divided into two stages: excita...

AI Technical Summary

Problems solved by technology

[0006] In various converter systems, the electromagnetic isolation link is often common. Generally, transformers are used. Power frequency transformers greatly increase the volume, weight and cost. Hysteresis, so under the same circumstances, no isolation device is the development trend

[0007] In general switched reluctance generator systems, the main circuits of excitation and power generation are often poorly controllable, and they are regulated strictly according to the rotor position information and operating principles. In the face of extreme conditions such as complex and changeable load side changes, there are often few ways to take the initiative , so when the battery is used as the excitation power supply, it is a more realistic way to use the battery power feedback to provide urgently needed power

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