| 摘要 |
An electronic voltage regulator for an ac electric generator precisely controls the generator output voltage and enhances motor starting ability. A filtered dc representation of the output voltage of the generator is produced by circuitry sensing the output voltage of the generator and rectifying to dc and filtering the voltage sense to obtain a relatively smooth dc voltage which is directly proportional to the output voltage of the generator and has on it a small amount of ripple voltage. A dc voltage which is proportional to the frequency of the generator is also produced by circuitry means which senses the frequency of the generator and produces a dc voltage proportional to the frequency of the generator up to a predetermined maximum frequency, not increasing above that maximum, and for amplifying the voltage produced. A comparator circuit compares the dc voltages. A small amount of hysteresis is built into the comparator circuit so that its output switches on and off in synchronization with the small ripple voltage. A signal produced from the comparator circuit controls the application of current from a quad winding of the generator to the generator field, to maintain the output voltage of the generator substantially constant.
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