发明名称 |
Vorrichtung zur Steuerung der Drehgeschwindigkeit eines Drehteils |
摘要 |
PURPOSE:To obtain a speed detector comprising only one half period detector by sequentially detecting half periods of a rotational speed proportional signal, transferring the detection output with half period timing and then adding the detection output to the transferring output. CONSTITUTION:A frequency generator signal 3 is subjected to frequency conversion as the rotational speed of a motor 1 varies with time. Consequently, the time interval between adjacent leading edge and trailing edge of a shaped speed proportional signal, i.e. the time interval of half period, varies. A half period detector 7c outputs a detection output 8d corresponding to the time interval of half period. A transfer unit 12 transfers the detection output 8d immediately after elapse of half period thus producing a transfer output 8e. An adder 13 adds the detection output 8d and the transfer output 8e to produce a control output, i.e. a speed detection output 8f. |
申请公布号 |
DE4132408(C2) |
申请公布日期 |
1995.12.07 |
申请号 |
DE19914132408 |
申请日期 |
1991.09.25 |
申请人 |
MITSUBISHI DENKI K.K., TOKIO/TOKYO, JP |
发明人 |
WATANABE, MIYOICHI, NAGAOKAKYO, KYOTO, JP |
分类号 |
H02P29/00;G01P3/48;G05D13/62;H02P23/00 |
主分类号 |
H02P29/00 |
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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