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Method for switching between a full winding mode and a half winding mode in a three-phase machine

A half-winding, multi-phase motor technology, applied in the direction of AC motor control, synchronous motor with stationary armature and rotating magnet, electrical components, etc., can solve the problems of reducing current ripple, high switching frequency, current flow, etc.

Active Publication Date: 2017-10-31
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, there may be current flowing in the parallel configuration due to coil EMF mismatch
Additionally, coils are required to be in the same stator slot for parallel operation, and lower coil inductance in parallel operation may require higher switching frequency to reduce current ripple

Method used

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  • Method for switching between a full winding mode and a half winding mode in a three-phase machine
  • Method for switching between a full winding mode and a half winding mode in a three-phase machine
  • Method for switching between a full winding mode and a half winding mode in a three-phase machine

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Embodiment Construction

[0016] The following discussion of embodiments of the invention relating to a method for switching between full-winding control mode and half-winding control mode in a three-phase PM motor is merely exemplary in nature and in no way limits the invention or Intended for its application or use. For example, the method of the present invention has particular application for three-phase PM motors on vehicles. However, as will be apparent to those skilled in the art, the method of the present invention will have application to other machines.

[0017] figure 1 is a cutaway end view of a conventional PM three-phase motor 10 . The electric machine 10 includes a central shaft 12 surrounded by and mounted to a cylindrical rotor 14 . The rotor 14 includes a plurality of permanent magnets 16 disposed around the outer circumference of the rotor 14 . Machine 10 also includes a cylindrical stator 18 with stator teeth 20 defining slots 22 therebetween through which stator windings 24 are...

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Abstract

A method for controlling switching between a full winding control mode and a half winding control mode for a multi-phase electric machine. The machine includes a stator and a rotor, split stator windings for each phase of the machine, where each stator winding includes a first winding section and a second winding section, an inverter circuit including a pair of inverter switches for each phase of the machine, where the pair of inverter switches for each phase is electrically coupled to the first and second winding sections for that phase, and a plurality of switch assemblies for switching between the full winding mode and the half winding mode, where each switch assembly is electrically coupled to the pair of inverter switches and the first and second winding sections for a particular phase, and where each switch assembly includes a first AC switching device and a second AC switching device.

Description

technical field [0001] The present invention relates generally to a method of switching between a full winding control mode and a half winding control mode for a three-phase motor, and more particularly to a full winding control for a three-phase permanent magnet (PM) AC motor A method of switching between mode and half-winding control mode, the three-phase permanent magnet (PM) AC motor includes segmented stator windings to reduce back EMF and increase the torque and power of the machine at higher machine speeds. Background technique [0002] Electric machines with a wide speed range are critical to automotive propulsion systems such as those used in hybrid vehicles, electric vehicles, fuel cell vehicles, etc., as well as for power generation applications. To maximize its torque / ampere ratio, motors are usually designed to have the highest possible induced voltage-to-speed ratio. However, because the induced voltage is proportional especially as the speed of the machine in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/18
CPCH02P25/18H02K1/12H02K21/14
Inventor C·S·纳姆杜里L·郝
Owner GM GLOBAL TECH OPERATIONS LLC
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