发明名称 |
D.C. motor speed control circuitry |
摘要 |
A closed loop D.C. motor speed control circuit compares tachometer feed-back signals proportional to the D.C. motor speed with a voltage reference representing the desired motor speed and generates pulses for controlling a variable duty cycle switch in the motor circuit for maintaining a constant speed irrespective of line voltage variations and load changes.
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申请公布号 |
US4121141(A) |
申请公布日期 |
1978.10.17 |
申请号 |
US19770796587 |
申请日期 |
1977.05.13 |
申请人 |
FAIRCHILD CAMERA AND INSTRUMENT CORPORATION |
发明人 |
FRAZEE, JEROME A. |
分类号 |
H02P3/08;H02P7/29;(IPC1-7):H02P5/16 |
主分类号 |
H02P3/08 |
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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