POWER SUPPLY SYSTEM
First Claim
1. A power supply system comprising:
- in a vehicle having an internal combustion engine,a DC generator for generating electric power by power generated from the internal combustion engine or power obtained by braking of the vehicle;
a capacitor coupled to an output of the DC generator;
a power converter whose input side is coupled to the capacitor and which is capable of controlling an output voltage or an output current;
a battery coupled to an output side of the power converter; and
a load coupled in parallel to the battery,wherein a limit value of the output current is defined as a first current value when a voltage at both ends of the capacitor charged by the DC generator is higher than a voltage at both ends of the battery, anda limit value of the output current is defined as a second current value when a voltage at both ends of the capacitor is substantially equal to a voltage at both ends of the battery,wherein the first current value is set to be smaller than the second current value.
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Accused Products
Abstract
A limit value of an output current of power converter is defined as a first current value when a voltage at both ends of capacitor is higher than a voltage at both ends of battery, and a limit value of the output current thereof is defined as a second current value when the voltages are substantially equal to each other, the first current value is set to be smaller than the second current value. Thus, when a voltage at both ends of capacitor and a voltage at both ends of battery are substantially equal, heat is hardly generated. The limit value of the output current is set to a maximum current consumed by load. When a voltage at both ends of capacitor is higher than a voltage at both ends of battery, the limit value of the output current is set to be smaller than the second current value, and thereby heat generation is suppressed. Thus, the size of the heat dissipating components can be reduced, and a power supply system whose entire size can be minimized can be provided.
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Citations
7 Claims
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1. A power supply system comprising:
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in a vehicle having an internal combustion engine, a DC generator for generating electric power by power generated from the internal combustion engine or power obtained by braking of the vehicle; a capacitor coupled to an output of the DC generator; a power converter whose input side is coupled to the capacitor and which is capable of controlling an output voltage or an output current; a battery coupled to an output side of the power converter; and a load coupled in parallel to the battery, wherein a limit value of the output current is defined as a first current value when a voltage at both ends of the capacitor charged by the DC generator is higher than a voltage at both ends of the battery, and a limit value of the output current is defined as a second current value when a voltage at both ends of the capacitor is substantially equal to a voltage at both ends of the battery, wherein the first current value is set to be smaller than the second current value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification