Non-interrupting power supplies for loads of less than 500 watts
First Claim
1. A non-interrupting power supply for supplying DC power to a load, comprising:
- input means adapted to be coupled to a source of AC power;
first means coupled to said input means and to said load for converting said AC power to DC power for utilization by said load;
second means for storing DC power;
charging means coupled to said input means and to said second means for charging said second means;
third means coupled to said input means and to said second means for sensing the failure of said source of AC power;
fourth means coupled to said first means and to said second means and responsive to said third means for supplying power from said second means to said first means upon failure of said source of AC power; and
regulating means coupled to said load and said first means for regulating the DC-power produced by said first means in accordance with load requirement, said regulating means comprises;
a voltage regulator coupled to the output of said first means;
a variable pulse width circuit having an output coupled to said first means; and
an optoelectronic isolator for coupling the output of said voltage regulator to an input of said variable pulse width circuit.
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Accused Products
Abstract
The distinguishing feature of so-called no break or non-interrupting power supplies over ordinary standby or emergency power systems is that no supply interruption (even momentary) occurs when the commercial power source fails or when commercial power again becomes available. This invention comprises a non-interrupting modular power supply system which can be configured for loads of from 15 to 100, watts or for 75 to 500 watts, respectively. The system combination supplies single or multiple regulated DC outputs meeting the requirements of the equipment being operated. A source of AC power is converted to DC for utilization by a load and for charging a back-up battery. When the source of AC power fails, the battery supplies power to the load. Means are provided to monitor the battery voltage to control its charging.
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Citations
7 Claims
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1. A non-interrupting power supply for supplying DC power to a load, comprising:
- input means adapted to be coupled to a source of AC power;
first means coupled to said input means and to said load for converting said AC power to DC power for utilization by said load;
second means for storing DC power;
charging means coupled to said input means and to said second means for charging said second means;
third means coupled to said input means and to said second means for sensing the failure of said source of AC power;
fourth means coupled to said first means and to said second means and responsive to said third means for supplying power from said second means to said first means upon failure of said source of AC power; and
regulating means coupled to said load and said first means for regulating the DC-power produced by said first means in accordance with load requirement, said regulating means comprises;
a voltage regulator coupled to the output of said first means;
a variable pulse width circuit having an output coupled to said first means; and
an optoelectronic isolator for coupling the output of said voltage regulator to an input of said variable pulse width circuit.
- input means adapted to be coupled to a source of AC power;
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2. A non-interrupting power supply for supplying DC power to a load, comprising:
- input means adapted to be coupled to a source of AC power;
first means coupled to said input means and to said load for converting said AC power to DC power for utilization by said load;
second means for storing DC power;
charging means coupled to said input means and to said second means for charging said second means;
third means coupled to said input means and to said second means for sensing the failure of said source of AC power;
fourth means coupled to said first means and to said second means and responsive to said third means for supplying power from said second means to said first means upon failure of said source of AC power; and
regulating means coupled to said load and said first means for regulating the DC-power produced by said first means in accordance with load requirement, said charging means comprises;
a charging converter coupled to said first means for producing AC power;
a pulse width modulator for driving said charging converter;
a transformer coupled to said charging converter for reducing said AC power; and
fifth means coupled to said transformer for converting the reduced AC power to DC power for charging said second means. - View Dependent Claims (3, 4, 5, 6, 7)
- input means adapted to be coupled to a source of AC power;
Specification