Converter system of switched reluctance generator

Abstract

The present invention relates to a converter system of a switched reluctance generator, which is composed of a storage battery, twenty-two diodes, a three-phase winding, seven switching tubes, twelvecapacitors, two inductors and a bidirectional isolation converter. Under a converting structure comprised of the converter system, the enhanced excitation capability is realized by the automatic parallel excitation of two branch windings of each phase winding; the full-series high step-up output is realized by the automatic series generation of two branch windings of each phase winding in combination with the storage battery and related capacitors. Only one switching tube is needed in the process. An extremely high voltage can be directly output with the least switching tube; the storage battery can be charged automatically and the reverse energy feeding can be also realized in the same set of converting circuit; the level of intelligence is improved; and the demands that the system can still meet the requirement when more electric energy is needed on the load side of the output terminal of the converter system are adapted. The maximum withstand voltage of each switching tube in the whole system is low; the switching loss is low; and the switching tube is suitable for the application in the converter system of the switched reluctance generator under various power inputs and parallel connection or direct loads.

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 high boost ratio, automatic battery charging and energy feeding. Background technique [0002] Because of its simple and firm structure, no winding on the rotor, convenient heat dissipation, high reliability, and strong fault tolerance, the switched reluctance motor has a wide range of application prospects. [0003] The switched reluctance generator works like a DC power supply, but in practice, after it outputs DC power, it often needs a special booster device to increase the voltage, and then merges it into the DC grid or connects the load, resulting in a complex structure of the entire converter system , high loss and low reliability. [0004] The excitation methods of switched reluctance generators generally include separate excitation and self-excitation. The excitation of the external excitation ...

AI Technical Summary

Problems solved by technology

[0003] The switched reluctance generator works like a DC power supply, but in practice, after it outputs DC power, it often needs a special booster device to increase the voltage, and then merges it into the DC grid or connects the load, resulting in a complex structure of the entire converter system , high loss, low reliability

[0004] The excitation methods of switched reluctance generators generally include separate excitation and self-excitation. The excitation of the external excitation mode is stable and does not affect the output terminal, but the maintenance cost is high and requires a separate excitation power supply such as a battery. The self-excitation mode does not require a separate power supply. The separately excited type has the disadvantages of often replacing the battery, etc., but it will generally cause large fluctuations at the output end, and at the same time, the input excitation power is unstable and the power quality is low; at present, there are also some excitation methods, which are powered by the battery and absorb the advantages of the separately excited type. , when necessary, use the electric energy at the output end to charge the battery, thus also absorbing the advantages of the self-excited type

[0005] In the field of wind power, the traditional doubly-fed asynchronous wind power generator system can provide electric energy to the output terminal at the same time in the stator and rotor windings when necessary, especially when the wind power grid is connected to the low voltage and other faults, it plays a very important role. In the field of application of resistance generators, the double-fed function cannot be realized in the traditional mode. In addition, considering the special circumstances of the load side, if the separately excited battery of the switched reluctance generator converter system has excitation and can also provide electric energy to the output terminal, It is bound to improve the adaptability of the entire power generation system

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