Control apparatus for charging generator
First Claim
1. In a control apparatus for a charging generator comprising a battery charged by a rectified output of an AC generator having a field coil and a voltage regulator for controlling a field current passing through the field coil to control the output voltage of the generator in a predetermined value, an improvement which comprises;
- a parallel combination of a first resistor and a first thermistor having a positive temperature coefficient which detects the variation of ambient temperature of the voltage regulator to impart a negative temperature gradient to the voltage adjusting characteristic of the voltage regulator,said first thermistor being thermally isolated from the generator and the voltage regulator, andsaid voltage regulator comprising a series combination comprising second, third and fourth resistors connected to said parallel combination and a second thermistor connected in parallel with said fourth resistor and having a negative temperature coefficient which detects the self-heating of the generator or the voltage regulator during the operation to impart a positive temperature gradient to the voltage adjusting characteristic.
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Accused Products
Abstract
A control apparatus for a charging generator for charging a battery comprises a first temperature detecting element having a positive temperature coefficient which detects the variation of ambient temperature of a voltage regulator to impart a negative temperature gradient to the voltage adjusting characteristic of the voltage regulator and a second temperature detecting element having a negative temperature coefficient which detects the self-heating of the generator or the voltage regulator during operation to impart a positive temperature gradient to the voltage adjusting characteristic so as to control the output voltage of the generator. This control apparatus has a dynamic characteristic permitting the adjusted voltage to increase so as to compensate the voltage drop in the external load characteristic; thus an excellent charging characteristic of the battery can be attained.
20 Citations
1 Claim
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1. In a control apparatus for a charging generator comprising a battery charged by a rectified output of an AC generator having a field coil and a voltage regulator for controlling a field current passing through the field coil to control the output voltage of the generator in a predetermined value, an improvement which comprises;
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a parallel combination of a first resistor and a first thermistor having a positive temperature coefficient which detects the variation of ambient temperature of the voltage regulator to impart a negative temperature gradient to the voltage adjusting characteristic of the voltage regulator, said first thermistor being thermally isolated from the generator and the voltage regulator, and said voltage regulator comprising a series combination comprising second, third and fourth resistors connected to said parallel combination and a second thermistor connected in parallel with said fourth resistor and having a negative temperature coefficient which detects the self-heating of the generator or the voltage regulator during the operation to impart a positive temperature gradient to the voltage adjusting characteristic.
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Specification
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- Resources
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Current AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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Original AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsMorishita, Mitsuharu
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Primary Examiner(s)Eisenzopf, Reinhard J.
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Application NumberUS06/364,628Time in Patent Office494 DaysField of Search320/35, 320/36, 322/33, 322/34US Class Current320/150CPC Class CodesH02J 7/007192 in response to temperatureH02J 7/24 using discharge tubes or se...
