Common monitoring and/or control of a flywheel and battery-based power supply system
First Claim
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1. A power supply system for supplying back-up power to a load, where the load is powered by power from an alternating current (AC) power source, the power supply system comprising:
- a flywheel system comprising a flywheel and an AC motor/generator electrically coupled to a direct current (DC) bus, the flywheel system configured to store, as kinetic energy, power received from the power source and, when power to the load from the power source decreases below a specified threshold, to provide the stored power to the load as electrical power through the DC bus;
a battery system electrically coupled concurrently with the flywheel system and without a switching circuit to the DC bus, the battery system to receive power from the power source and the battery system configured to remain electrically coupled to the DC bus while the flywheel system is providing power to the load, to store power received from the power source and to provide power to the load through the DC bus; and
a controller coupled to the flywheel system and the battery system, the controller configured to monitor the flywheel system and the battery system.
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Abstract
A power supply system includes a flywheel system electrically coupled to a DC bus for supplying electrical power between a power grid and a load. The flywheel system includes a flywheel coupled to rotate with a rotor of a motor/generator. A battery system is electrically coupled to the DC bus concurrently with the flywheel system.
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Citations
21 Claims
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1. A power supply system for supplying back-up power to a load, where the load is powered by power from an alternating current (AC) power source, the power supply system comprising:
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a flywheel system comprising a flywheel and an AC motor/generator electrically coupled to a direct current (DC) bus, the flywheel system configured to store, as kinetic energy, power received from the power source and, when power to the load from the power source decreases below a specified threshold, to provide the stored power to the load as electrical power through the DC bus; a battery system electrically coupled concurrently with the flywheel system and without a switching circuit to the DC bus, the battery system to receive power from the power source and the battery system configured to remain electrically coupled to the DC bus while the flywheel system is providing power to the load, to store power received from the power source and to provide power to the load through the DC bus; and a controller coupled to the flywheel system and the battery system, the controller configured to monitor the flywheel system and the battery system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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supplying AC power from a flywheel system, rectified, to a DC bus while a battery system is electrically coupled without a switching circuit to the DC bus concurrently with the flywheel system, the battery system and the flywheel system to receive power from a power source, the DC bus coupled to a load for supplying power to the load through the DC bus; supplying DC power from the battery system to the DC bus; and monitoring the flywheel system and the battery system with a common controller. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A power supply system for providing backup power to a load powered by an AC power source, comprising:
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a flywheel system comprising a flywheel and a motor/generator electrically coupled to a DC bus to provide power to the DC bus, the flywheel configured to receive power from the AC power source, the DC bus for supplying electrical power to the load; a battery system electrically coupled without a switching circuit to the DC bus to supply power to the DC bus, the battery system configured to remain electrically coupled to the DC bus concurrently with the flywheel system while the flywheel system is providing power to the DC bus, and to supply power to the load through the DC bus in response to a voltage of the power supplied to the load by the flywheel system falling below a voltage at which the battery system is configured to supply power to the load; and a controller coupled to the flywheel system and the battery system, the controller configured to monitor the flywheel system and the battery system. - View Dependent Claims (18, 19, 20, 21)
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Specification