发明名称 |
MOTOR CONTROL ARRANGEMENT |
摘要 |
<p>PHN 883 15-2-78 A motor control circuit for an a.c. motor which is energized via power switches by a direct voltage obbained from an alternating voltage mains via rectifiers and a smoothing capacitor. A frequency reference signal is applied to a circuit which controls the power switches via a first amplirier with output signal limitation in series with an integrator, whose output provides feedback to the input of the first amplifier. A negative current-feedback loop with a motor current detector, whose output signal is compared with the reference signal in a comparator, acts at a point between the amplifier and the integrator in order to close the negative feedback loop when the motor current exceeds a predetermined value. A negative voltage-feedback loop with a detector for the direct voltage obtained from the a.c. malns, the output signal of said detector being compared with a reference signal, also acts at the point between the amplifier and integrator in order to close said negative voltage-feedback loop when said direct voltage exceeds a predetermined value.</p> |
申请公布号 |
CA1122270(A) |
申请公布日期 |
1982.04.20 |
申请号 |
CA19780305561 |
申请日期 |
1978.06.15 |
申请人 |
N.V. PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
ROSINK, WILHELMUS B.;COX, CORNELUS P.J. |
分类号 |
H02P3/18;H02P23/06;H02P27/06;(IPC1-7):H02P5/40 |
主分类号 |
H02P3/18 |
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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