A High Speed ​​Switched Reluctance Generator Converter System

Abstract

Disclosed is a high-speed switch reluctance generator current conversion system; the high-speed switch reluctance generator current conversion system comprises three-phase-winding current conversion circuits of the same structure, and a variable excitation current conversion circuit, wherein the three-phase-winding current conversion circuits consist of three-phase of windings, eighteen diodes, fifteen capacitors and six switch tubes; the current conversion circuits of each phases of windings are the same in structure and are connected in parallel, so that high expandability is achieved; the structure and the control method of the variable excitation current conversion circuit under the self-excitation mode are as follows: the excitation voltage can be adjusted according to needs in a widerange; the current conversion circuits of each phases of windings are connected in parallel to obtain high voltage directly, so that a part of the current conversion links can be omitted; due to thefact that the current conversion circuit switch tube of each phase of winding works in a single-pulse-wave mode, so that the switch loss is low; meanwhile, a newest continuous operation mode can be supported and realized; the excitation voltage is independently obtained by splitting each phase of winding, so that the excitation capacity is improved; and the full-system control method is simple andsuitable for various fields of the current high-speed switch reluctance generators.

Description

technical field [0001] The invention relates to the field of switched reluctance generator systems, in particular to a converter of a high-speed switched reluctance generator and a control method thereof. Background technique [0002] The switched reluctance motor has a simple structure, low cost, no winding on the rotor, and low heat dissipation pressure. As a generator, it has considerable application value. [0003] At present, the more mature switched reluctance generator systems in commercial application are mostly high-speed operation. [0004] In many fields where switched reluctance generators are applied, a voltage much higher than the voltage output by direct power generation is often required, and a circuit to increase the voltage needs to be added to complete. If the high voltage is directly obtained, the traditional method Naturally, the different-phase winding power generation circuits are connected in series after output, but due to the time-sharing character...

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Problems solved by technology

[0006] At present, internationally, the switched reluctance motor research group of the University of Podgorica in the Republic of Montenegro has realized the full-time continuous operation mode of the winding current of each phase when the switched reluctance generator is running, but most of the current conversion systems are not very good. Supporting this method, for example, requires a large number of switching tubes to operate in PWM mode, resulting in a large number of switching losses

[0007] Considering that the input mechanical power is unstable or the load changes, it is often necessary to automatically adjust the output electric energy or improve the electric energy output capacity according to changes in these surrounding conditions. The adjustability of the excitation power supply is an important and convenient operation regulation mode. However, most current variable excitation converter systems have a limited range of change, and rarely have a ratio of the highest to the lowest greater than 3. The range is narrow, which limits the greater flexibility and adaptability of the converter system.

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