基本信息:
- 专利标题： Electric motor control apparatus and method
- 专利标题（中）：电动马达控制装置及方法
- 申请号：EP92107236.9 申请日：1992-04-28
- 公开(公告)号：EP0512372A3 公开(公告)日：1994-07-06
- 发明人： DeLange, Robert J.
- 申请人： ALLEN-BRADLEY COMPANY, INC.
- 申请人地址： 1201 South Second Street Milwaukee Wisconsin 53204 US
- 专利权人： ALLEN-BRADLEY COMPANY, INC.
- 当前专利权人： ALLEN-BRADLEY COMPANY, INC.
- 当前专利权人地址： 1201 South Second Street Milwaukee Wisconsin 53204 US
- 代理机构： Lippert, Hans, Dipl.-Ing.
- 优先权： US695870 19910506
- 主分类号： H02P3/18
- IPC分类号： H02P3/18 ; H02P7/62
摘要：
An electric induction motor (10) is connected by a switch means (30) to a source (A, B, c) of three-phase alternating electricity. The speed of the motor is determined by detecting when the source voltage has made a zero crossing and thereafter sensing the polarity of the back emf voltage induced in each winding (11, 12, 13) of the motor when the switch means is non-conductive. After several zero crossings a set of polarity samples has been produced from each winding. A motor controller (20) determines the motor speed by detecting the occurrence of a predefined relationship among samples in each set. For example, the speed is in the range of fifty to about thirty-eight percent of full synchronous speed when three consecutive samples from one winding all have the same polarity. The occurrence of the predefined relationship among back emf polarity samples can be used to control the braking of the motor.
公开/授权文献:
- EP0512372A2 Electric motor control apparatus and method 公开/授权日：1992-11-11
IPC结构图谱:
| H | 电学 |
| --H02 | 发电、变电或配电 |
| ----H02P | 电动机、发电机或机电变换器的控制或调节；控制变压器、电抗器或扼流圈 |
| ------H02P3/00 | 电动机、发电机或机电变换器的停止或减速装置 |
| --------H02P3/02 | .零部件 |
| ----------H02P3/18 | ..用于交流电动机的停止或减速的 |