Novel variable-speed salient-pole synchronous motor and huge rotary frequency converter

Abstract

The invention provides a novel variable-speed salient-pole synchronous motor and a huge rotary frequency converter. The novel variable-speed salient-pole synchronous motor belongs to the category of motor principle, characteristic and structure; the huge rotary frequency converter belongs to novel flexible alternating-current power transmission technology, relating to a variable frequency transformer (VFT). The problems to be solved in the invention are as follows: realization of variable speed and constant frequency of the salient-pole synchronous motor, realization of the asynchronous running of the synchronous motor, and realization of the rotary frequency conversion. The stator of the novel variable-speed salient-pole synchronous motor is identical with the normal alternating-current motor stator; the rotor is m-phase (m is generally equal to 3) p pairs salient-pole magnetic poles, wherein m is a positive integer more than 1. The magnetic pole winding of the rotor is spatially distributed by the electric angle of 360 degrees / m and is the alternating-current excitation and variable-frequency power supply excitation with the electric angle of 360 degrees / m referring to time. As to the magnetic passage, the p pairs of salient-pole magnetic poles of the rotor can adopt a shunted or cascaded magnetic passage mode; and the shunted mode is preferably selected. The novel variable-speed salient-pole synchronous motor and the huge rotary frequency converter are cores of a huge variable-frequency transformer, a novel large variable-speed hydroelectric generating set and a wind power generating set and systems thereof, and are a fundamental original innovative invention.

Description

technical field [0001] The present invention belongs to the principle, characteristics and structure category of novel variable speed salient pole synchronous motors (Electric Machines) and novel flexible alternating current transmission technology FACTS (Flexible Alternating Current Transmission System), especially relates to novel variable speed constant frequency salient pole synchronous motors (Novel Variable Speed ​​Salient Pole Synchronous Motors) Synchronous Machines) and variable frequency transformer-VFT (Variable Frequency Transformer) are fundamental original innovations. Background technique [0002] At the 1992 International Large Power Grid Conference, the 11th (Rotating Electric Machine) Academic Committee plenary session, the new variable speed synchronous motor as the first priority topic "new development and experience of electric motors", scholars from the former Soviet Union, Japan and other countries made special reports. The research and development of ...

AI Technical Summary

Problems solved by technology

In terms of structure, once the rotor core is separated, many new problems will arise in the fixing and binding of the rotor winding, which will become insurmountable difficulties in design, manufacture, installation, transportation, operation, maintenance, etc.

Images