Control method of multiphase motor driving topology with suspension capacitor

A suspension capacitor and motor drive technology, which is applied in motor generator control, electronic commutation motor control, motor control, etc., can solve the problems of inapplicability and less control dimensions, and achieve extended life, stable working status, and reliable torque. control effect
CN110707975AInactive Publication Date: 2020-01-17HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2020-01-17
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a control method of a multiphase motor driving topology with a suspension capacitor. The method comprises the following steps of performing vector control of rotor flux linkageorientation on a power supply side main inverter to drive a multiphase open winding motor to operate; based on a preset modulation ratio range and a voltage real-time value of the suspension capacitor, independently controlling a suspension capacitor side auxiliary inverter to obtain part of active power outputted by the main inverter through a multi-phase motor winding, and independently controlling the auxiliary inverter to compensate the output reactive power, so that the main inverter only outputs the active power, and the voltage change of the suspension capacitor is controllable according to the actual operation condition. According to the invention, by combining the characteristics of a power supply side and two control cores (capacitor voltage controllability and reactive power compensation) of a capacitor side, and adopting the hybrid mode of main inverter torque flux linkage decoupling and auxiliary inverter active and reactive decoupling, it is guaranteed that the working state of the capacitor side auxiliary inverter is stable, the advantage of reactive compensation of the capacitor side auxiliary inverter is brought into play to the maximum extent, the switching lossof the suspended capacitor side inverter is effectively reduced, and the system efficiency is improved.
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Description

technical field

[0001] The invention belongs to the field of motor control, and more specifically relates to a control method for driving topology of a multi-phase motor with a floating capacitor. Background technique

[0002] Due to the global energy crisis brought about by fossil energy and environmental pollution that cannot be ignored, the development and utilization of clean energy has become a core issue in the energy industry. However, various forms of energy cannot be used directly. Electric energy is the most suitable form of energy for all clean energy such as wind energy and tidal energy. Therefore, the rapid development of the renewable energy power generation industry has promoted the consumption of electricity. Research on electric traction and transmission technology.

[0003] However, after many years of development, the traditional motor theory and electric drive control technology can no longer meet the increasing industrial demand. New motors, drive topol...

Claims

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