Surface-mounted permanent magnet transformation frequency converter based on magnetic field modulation principle and design method

Abstract

The invention discloses a surface-mounted permanent magnet voltage transformation frequency converter based on a magnetic field modulation principle and a design method, and the method comprises the following steps: additionally arranging a rotating magnetic field adjusting ring between an inner stator iron core and an outer stator iron core, modulating the rotating magnetomotive force generated by an inner stator winding of p antipodes into a rotating magnetic field of np antipodes through the rotating magnetic field adjusting ring, according to the transformer and the design method thereof, the inner stator winding and the outer stator winding correspond to np antipodes of the outer stator winding, the rotating magnetomotive force generated by the inner stator winding and the modulated three-phase rotating magnetic field rotate at the synchronous rotating speed, and the modulated rotating magnetic field induces n-frequency-doubled symmetrical three-phase alternating-current voltage in the outer stator winding. And the system has the characteristics of high economical efficiency, high operation reliability and excellent performance.

Description

technical field [0001] The invention belongs to the technical field of new energy and electric power engineering, and in particular relates to a surface-mounted permanent magnet variable voltage converter and a design method based on the magnetic field modulation principle. Background technique [0002] The power grid is an important infrastructure related to the national economy, a carrier of power transmission and an important platform for the optimal allocation of energy resources. In recent years, especially with the accelerated development of clean energy and the popularization and application of grid intelligent technology, the traditional power system is rapidly showing new characteristics of high proportion of power electronics and high proportion of new energy power supply. Due to the reverse distribution of energy and productivity in our country, and energy production is far away from the power load center, in order to meet the growing demand for electricity in eco...

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Problems solved by technology

However, this device requires an external DC motor to drive the rotor, and the efficiency is difficult to further improve

[0004] High-power electromagnetic power conversion devices have a broad application space in our country, but there are few domestic researches on this aspect at present, and there is no economical method in the field of power frequency conversion. Devices with high reliability, high operational reliability and superior performance are applied, and this technology should be further studied and promoted in a timely manner.

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