| 发明名称 |
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| 摘要 |
A digital current regulator circuit, especially useful for a DC motor, is described which is fed directly, i.e., without power transformers, from the AC mains, via power transistors (T1-T4) that are controlled by pulse modulation and which can work in four-quadrant operation. An A/D converter (12) generates from samples of the motor current, an actual-value signal in the form of a multi-bit parallel binary code; and a binary comparator (20) compares the actual-value code with a theoretical-value code and generates binary error signals if the actual value is greater or less than the theoretical value. To provide DC-isolation of the power transistors and associated circuitry from the control circuitry that generates the error signals, the parallel bits of the actual-value code are transmitted to the control circuitry through an opto-electronic coupler (14). Other opto-electronic couplers (16, 30) can be provided to transmit other control signals. |
| 申请公布号 |
DE3131574(C2) |
申请公布日期 |
1987.01.02 |
| 申请号 |
DE19813131574 |
申请日期 |
1981.08.10 |
| 申请人 |
ASR SERVOTRON AG, 1213 LE PETIT-LANCY, GENEVE, CH |
发明人 |
PETSCH, JOHANN, 8011 POING, DE;KOHN, ERIC F., 1213 LE PETIT LANCY, CH |
| 分类号 |
H02M3/00;H02P7/00;H02P7/28;H02P7/29 |
主分类号 |
H02M3/00 |
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