发明名称 |
Method and apparatus for determining shaft position and for providing commutation signals. |
摘要 |
Analog sensors generate phase-displaced analog signals responsive to the angular position of a shaft. A logic circuit (12) produces a digital code indicating the region of the cycle in which the shaft is instantaneously located. An analog multiplexor (14) selects a unique pair of analog signals according to the value of the digital code. An analog to digital converter (16, 26) then generates a digital signal used to activate an address in a memory (28). As the shaft turns, the addresses in the memory (28) are activated in a predetermined order to produce trains of pulses indicating angular velocity, direction as well as displacement of the shaft, and commutation pulses, for controlling a brushless motor. The apparatus therefore can be used to monitor the angular displacement of the shaft and, at the same time, to control the motor which drives that shaft. |
申请公布号 |
EP0239026(A2) |
申请公布日期 |
1987.09.30 |
申请号 |
EP19870104119 |
申请日期 |
1987.03.20 |
申请人 |
PERFORMANCE CONTROLS, INC. |
发明人 |
GOFF, JERRY K.;CHIZEVER, GARY E. |
分类号 |
G01B21/22;G01D5/245;G01D5/247;H02P6/14;H02P6/16 |
主分类号 |
G01B21/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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