Power supply system for a telecommunication system
First Claim
1. A power supply system for a telecommunications system comprising:
- (a) DC bus lines which are connectable to a telecommunications system;
(b) a storage battery connected across the DC bus lines;
(c) an internal combustion engine and means for responding to a control signal to start the engine;
(d) an alternator coupled to the engine to be driven by it and having AC output terminals;
(e) a rectifier connected to the output terminals of the alternator for rectifying the AC output of the alternator to a DC voltage;
(f) e means for filtering the DC voltage from the rectifier to provide a filtered DC voltage to the DC bus lines;
(g) means for controlling the alternator when the engine is running to provide a controlled DC output voltage from the rectifier and the means for filtering to the DC bus lines so that the voltage across the DC bus lines is maintained at a selected voltage level;
(h) a charger connected to receive power from an AC power system and connected to supply DC power to the DC bus lines when AC power is available from the AC power system;
(i) control means connected to monitor the voltage on the DC bus lines for providing a control signal to turn on the engine when the voltage across the DC bus lines drops belows a predetermined value and for controlling the means for controlling the alternator for activating the alternator to provide the DC output power from the rectifier and filter means to the DC bus lines.
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Accused Products
Abstract
An auxiliary power supply system includes an internal combustion engine driving an alternator the output of which is rectified and supplied to DC bus lines across which a storage battery is connected. The DC bus lines may supply a consuming device such as an uninterruptible power supply or telecommunications system. The voltage across the bus lines is sensed and when the voltage drops below a selected value, indicating that the consuming devices is drawing power from the battery beyond a desired limit, the engine is turned on for a period of time to warm it up, during which the power from the generator is not supplied to the DC bus lines. Thereafter, the generator supplies power to the DC bus lines to supply the consuming device and partially recharge the battery until the consuming device is no longer drawing power, after which the engine is shut off. The power supply system includes a controller which monitors the intervals of time between turn-ons of the engine and if a selected period of time is exceeded, the engine is started without supplying power from the generator to the DC bus lines to allow the engine and generator to warm-up, enhancing maintenance of the system. The operating characteristics of the engine and generator are sensed and stored for access by an operator and warnings are provided if these conditions exceed acceptable limits.
233 Citations
9 Claims
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1. A power supply system for a telecommunications system comprising:
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(a) DC bus lines which are connectable to a telecommunications system; (b) a storage battery connected across the DC bus lines; (c) an internal combustion engine and means for responding to a control signal to start the engine; (d) an alternator coupled to the engine to be driven by it and having AC output terminals; (e) a rectifier connected to the output terminals of the alternator for rectifying the AC output of the alternator to a DC voltage; (f) e means for filtering the DC voltage from the rectifier to provide a filtered DC voltage to the DC bus lines; (g) means for controlling the alternator when the engine is running to provide a controlled DC output voltage from the rectifier and the means for filtering to the DC bus lines so that the voltage across the DC bus lines is maintained at a selected voltage level; (h) a charger connected to receive power from an AC power system and connected to supply DC power to the DC bus lines when AC power is available from the AC power system; (i) control means connected to monitor the voltage on the DC bus lines for providing a control signal to turn on the engine when the voltage across the DC bus lines drops belows a predetermined value and for controlling the means for controlling the alternator for activating the alternator to provide the DC output power from the rectifier and filter means to the DC bus lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification