Generator control circuit having alarm controller
First Claim
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1. A generator control circuit of an ac generator for charging a battery which includes a field coil, said generator control circuit comprising:
- a voltage regulator for regulating an output voltage of said ac generator to a regulation voltage,a comparator for providing a first signal when the output voltage of the ac generator is equal to or lower than the regulation voltage and higher than a predetermined voltage which is higher than voltage of said battery when said battery is open;
means for alarming when said comparator does not provide the first signal; and
a discrimination circuit connected to the field coil, wherein;
said voltage regulator comprises a first switch having an output terminal connected to the field coil;
the predetermined voltage of said comparator is equal to the regulation voltage so that said comparator provides a regulation voltage signal to turn on or off said first switch to control current supplied to the field coil when the output voltage becomes higher than the regulation voltage;
the first signal is formed from the regulation voltage; and
said discrimination circuit provides a signal for resetting said holding circuit to hold said alarming means operative if field current is not controlled by said first switch irrespective of the first signal.
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Abstract
A generator control circuit of an ac generator which charges a battery includes a voltage regulator, a comparator which provides a control signal for controlling the voltage regulator when the output voltage of the ac generator is higher than a predetermined voltage and an alarming device which operates when the comparator does not provide the control signal. The predetermined voltage is set higher than voltage of the battery when the battery is open and equal to or lower than a regulation voltage of the ac generator.
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Citations
15 Claims
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1. A generator control circuit of an ac generator for charging a battery which includes a field coil, said generator control circuit comprising:
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a voltage regulator for regulating an output voltage of said ac generator to a regulation voltage, a comparator for providing a first signal when the output voltage of the ac generator is equal to or lower than the regulation voltage and higher than a predetermined voltage which is higher than voltage of said battery when said battery is open; means for alarming when said comparator does not provide the first signal; and a discrimination circuit connected to the field coil, wherein; said voltage regulator comprises a first switch having an output terminal connected to the field coil; the predetermined voltage of said comparator is equal to the regulation voltage so that said comparator provides a regulation voltage signal to turn on or off said first switch to control current supplied to the field coil when the output voltage becomes higher than the regulation voltage; the first signal is formed from the regulation voltage; and said discrimination circuit provides a signal for resetting said holding circuit to hold said alarming means operative if field current is not controlled by said first switch irrespective of the first signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A generator control circuit of an ac generator for charging a battery which includes a field coil, said generator control circuit comprising:
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output control means for providing a first control signal to reduce current supplied to the field coil when the output value of the generator is higher than a regulation value and a second control signal to increase the current supplied to the field coil when the output value of the generator is lower than the regulation value; control switching means for maintaining a first control operation until said output control means provides the first control signal and changing from the first control operation to a second control operation when said output control means provides the second control signal, said control switching means including holding means for holding said second control operation after said output control means provides the first control signal; and a discrimination circuit, connected to the field coil, for providing a signal for resetting said holding means to hold said alarming means operative if field current is not controlled by said first switch irrespective of the first signal. - View Dependent Claims (8, 9, 10)
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11. A generator control circuit of an ac generator for charging a battery which includes a field coil, said generator control circuit comprising:
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a voltage regulator for regulating an output voltage of said ac generator to a regulation voltage, said voltage regulator including a first switch having an output terminal connected to the field coil; a comparator for providing a first signal when the output voltage of the ac generator is equal to or lower than the regulation voltage and higher than a predetermined voltage which is higher than voltage of said battery when said battery is open; means for alarming when said comparator does not provide the first signal; and a discrimination circuit connected to the field coil, wherein; said alarming means comprises a holding circuit for holding said alarming means inoperative after the generator is operated and said comparator provides the first signal and a second switch controlled by said holding circuit; and said discrimination circuit provides a signal for resetting said holding circuit to hold said alarming means operative if field current is not controlled by said first switch irrespective of the first signal. - View Dependent Claims (12, 13, 14, 15)
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Specification