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基本信息:
- 专利标题: 用于可调速驱动器中接地故障检测和保护的系统和方法
- 专利标题(英):System and method for ground fault detection and protection in adjustable speed drives
- 申请号:CN201380023469.0 申请日:2013-04-23
- 公开(公告)号:CN104285350A 公开(公告)日:2015-01-14
- 发明人: H·李 , Y·L·法米利安特
- 申请人: 伊顿公司
- 申请人地址: 美国俄亥俄州
- 专利权人: 伊顿公司
- 当前专利权人: 伊顿智能动力有限公司
- 当前专利权人地址: 美国俄亥俄州
- 代理机构: 北京市中咨律师事务所
- 代理人: 杨晓光; 于静
- 优先权: 13/464,014 2012.05.04 US
- 国际申请: PCT/US2013/037795 2013.04.23
- 国际公布: WO2013/165753 EN 2013.11.07
- 进入国家日期: 2014-11-04
- 主分类号: H02H3/16
- IPC分类号: H02H3/16 ; H02H7/122 ; H02P29/02
A system and method for detecting ground faults in an AC motor drive is disclosed. A fault detection and protection system for an AC motor drive includes current sensors to measure first and second phase output currents, a voltage sensor to measure a DC link voltage, and a desaturation control circuit to determine a voltage and associated current across PWM inverter switches for a third phase of the output. A controller compares the first and second phase currents, the measured DC link voltage, and the voltage across the PWM inverter switches on the third phase, to a plurality of thresholds. The controller detects a ground fault on one of the first, second, and third phases of the three phase output to the AC motor based on the comparisons of the first and the second phase currents, the DC link voltage, and the voltage across the switches to the thresholds.
公开/授权文献:
- CN104285350B 用于可调速驱动器中接地故障检测和保护的系统和方法 公开/授权日:2017-10-24
IPC结构图谱:
H | 电学 |
--H02 | 发电、变电或配电 |
----H02H | 紧急保护电路装置 |
------H02H3/00 | 对正常电工作情况的不希望有的变化直接响应的自动断开紧急保护电路装置,有或无事后再连接 |
--------H02H3/16 | .对接地、接框架或接物体的故障电流响应的 |