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Method and inverter with thermal management for controlling an electric machine

一种逆变器、器件的技术，应用在控制系统、电动机控制、电动发电机控制等方向，能够解决限制、输出能力低、逆变器电流输出能力低输出能力等问题

Active Publication Date: 2016-12-28
DEERE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some prior art, the maximum current that can be supplied to the motor by the inverter is limited by the junction temperature of the inverter's switching device
In standstill and low base frequency operation, the current output capability of the inverter is limited to a lower output capacity than can be achieved when operating at a higher base frequency

Method used

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  • Method and inverter with thermal management for controlling an electric machine
  • Method and inverter with thermal management for controlling an electric machine
  • Method and inverter with thermal management for controlling an electric machine

Examples

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no. 2 example

[0102]Under the second embodiment, if the duty cycle adjustment is not at the maximum duty cycle adjustment (eg, upper and lower limits), and if the hottest device among the semiconductor devices is the high-side semiconductor switch (Q1, Q3, Q5 ) or high-side diodes (D1, D3, D5), thermal regulation module 130 or data processing system 120 adjusts the duty cycle downward (eg, common-mode duty cycle), wherein the duty cycle adjustment is based on one of the following One or more of: (1) the peak or maximum current in the semiconductor device (e.g., a switch or diode) having the highest current among the three phases of the inverter 188 during a cycle, or one of the three phases having the highest current peak or maximum current at phase output terminal 199; (2) medium current for semiconductor devices, or medium current at one phase output 199 between the lowest phase current output and the highest phase current output, (3) peak regulated The peak adjusted duty cycle data 131 m...

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PUM

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Abstract

The invention discloses a method and inverter with thermal management for controlling an electric machine. A temperature estimation module estimates each junction temperature of a corresponding semiconductor device, among a plurality of semiconductor devices, for each phase of an inverter. The temperature estimation module or the data processing system determines a hottest device with a highest junction temperature among the semiconductor devices. A thermal adjustment module or data processing system determines if the highest junction temperature parameter is less than maximum junction temperature parameter for the respective semiconductor device or deciding whether or not to adjust a duty cycle of the semiconductor devices.

Description

[0001] Cross References to Related Applications [0002] This application, including the drawings, is based on 35 U.S.C. § 119(e) claiming the priority and filing date of U.S. Provisional Application No. 62 / 182,108, filed June 19, 2015, which is hereby incorporated by reference in its In this article. technical field [0003] The present application relates to a method for controlling an electric machine and an inverter with thermal management. Background technique [0004] An electric machine may feature a rotor with permanent magnets and a stator, such as an interior permanent magnet (IPM) machine or an IPM synchronous machine. The inverter may control an electric motor or other electrical machines, such as AC motors, variable frequency motors. In some prior art, the maximum current that can be supplied to the motor by the inverter is limited by the junction temperature of the switching devices of the inverter. During shutdown and low base frequency operation, the curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/06H02P27/12H02M7/48
CPCH02M7/48H02P27/06H02P27/12H02P2201/00H02M7/53875H02P29/68H02M1/32H02M1/327
Inventor 大卫·M·洛肯吴隆付天均罗伯特·B·肖尼尔·D·克莱蒙斯
Owner DEERE & CO