Unidirectional battery charge/discharge controller for a regulated electrical bus system with a solar current source
First Claim
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1. An electrical power subsystem for use with a fully regulated electrical bus system having a voltage bus for providing operating power to a load connected to the bus, comprising:
- a bus voltage limiter coupled to the regulated bus, the bus voltage limiter operative to maintain bus power at a predetermined level;
an energy storage device;
an at least two section solar array having a first section and a second section, said first section being a current source coupled in parallel with the energy storage device, the current source providing a charging current to the storage device for charging same, said second section coupled through said bus voltage limiter to the regulated electrical bus supplying power to a system load; and
a unidirectional charge/discharge controller having a power stage, said power stage coupled between the first section and energy storage device and said voltage bus, the charge/discharge controller operative to regulate the amount of charging current provided to the energy storage device to provide an optimum current charge in the energy storage device, a power stage responsive to the charge current coupled to the battery and operative to maintain the battery charge at a predetermined level by coupling excess charge current to the regulated voltage bus.
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Abstract
In a satellite experiencing alternate periods of light and eclipse, an electrical power control system utilizing direct energy transfer battery charging in a fully regulated electrical bus system to provide and control the system power over both the charging and the discharging cycles of the satellite electrical system.
9 Citations
11 Claims
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1. An electrical power subsystem for use with a fully regulated electrical bus system having a voltage bus for providing operating power to a load connected to the bus, comprising:
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a bus voltage limiter coupled to the regulated bus, the bus voltage limiter operative to maintain bus power at a predetermined level; an energy storage device; an at least two section solar array having a first section and a second section, said first section being a current source coupled in parallel with the energy storage device, the current source providing a charging current to the storage device for charging same, said second section coupled through said bus voltage limiter to the regulated electrical bus supplying power to a system load; and a unidirectional charge/discharge controller having a power stage, said power stage coupled between the first section and energy storage device and said voltage bus, the charge/discharge controller operative to regulate the amount of charging current provided to the energy storage device to provide an optimum current charge in the energy storage device, a power stage responsive to the charge current coupled to the battery and operative to maintain the battery charge at a predetermined level by coupling excess charge current to the regulated voltage bus. - View Dependent Claims (2, 3, 4, 5, 6)
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7. The method of controlling an electrical power subsystem for use with a fully regulated electrical bus system, comprising the steps of:
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providing an electrical storage battery; charging the battery by directly coupling the output from a first current source into the battery; monitoring the charge status of the battery and regulating the charging current to maintain the battery charge at optimum by diverting part of the charging current away from the battery. - View Dependent Claims (8, 9, 10, 11)
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Specification