DE2316237
A control circuit for a direct current electric motor selectively operable as a series motor and as a shunt motor. The circuit includes means to switch connections of the motor armature and of the motor field to adapt such connections to assure the proper armature commutation under predetermined loa...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A control circuit for a direct current electric motor selectively operable as a series motor and as a shunt motor. The circuit includes means to switch connections of the motor armature and of the motor field to adapt such connections to assure the proper armature commutation under predetermined load conditions. Field current is varied, in the shunt mode, by comparing a voltage drop proportional to armature current against the voltage drop across a resistor. |
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