Power supply system for providing uninterrupted output power
First Claim
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1. An electric power supply system comprising:
- a. a plurality of parallel connected power supplies having substantially equal power ratings and operable at substantially the same output voltage, each of said power supplies capable of supplying full load current to an attached load and independently operable in the absence of any other power supplies, each of said power supplies including;
1. a controllable power inverter including primary and secondary circuits, said primary circuit including switching means responsive to drive signals for controlling the power coupled from said primary circuit to said secondary circuit,2. drive means connected to said primary circuit for generating said drive signals;
b. an independently operable cutoff means associated with each of said power supplies for producing a shut-off signal when the voltage of its associated power supply secondary circuit exceeds a predetermined value; and
,c. means for supplying said shut-off signal to the drive means of the associated power supply for inhibiting the application of drive signals to the switching means of the associated power supply whereby said associated power supply is turned off while permitting all other power supplies in the system to continue supplying power to said load.
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Abstract
A power supply system includes a plurality of power supplies having their outputs connected in parallel to provide a common voltage to an electrical load. Each power supply is self-regulating and capable of automatically turning off under power supply malfunction and overload conditions and turning back on after the condition is removed without affecting the operation of the other power supplies or interrupting the common voltage.
29 Citations
7 Claims
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1. An electric power supply system comprising:
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a. a plurality of parallel connected power supplies having substantially equal power ratings and operable at substantially the same output voltage, each of said power supplies capable of supplying full load current to an attached load and independently operable in the absence of any other power supplies, each of said power supplies including; 1. a controllable power inverter including primary and secondary circuits, said primary circuit including switching means responsive to drive signals for controlling the power coupled from said primary circuit to said secondary circuit, 2. drive means connected to said primary circuit for generating said drive signals; b. an independently operable cutoff means associated with each of said power supplies for producing a shut-off signal when the voltage of its associated power supply secondary circuit exceeds a predetermined value; and
,c. means for supplying said shut-off signal to the drive means of the associated power supply for inhibiting the application of drive signals to the switching means of the associated power supply whereby said associated power supply is turned off while permitting all other power supplies in the system to continue supplying power to said load. - View Dependent Claims (2, 3)
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4. An electric power supply system comprising:
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a. a plurality of parallel connected power supplies having substantially equal power ratings and operable at substantially the same output voltage, each of said power supplies capable of supplying full load current to an attached load and independently operable in the absence of any other power supplies, each of said power supplies including, 1. a controllable power inverter including primary and secondary circuits, said primary circuit including switching means responsive to drive signals for controlling the power coupled from said primary circuit to said secondary circuit, said secondary circuit providing voltage to said load and including means for generating alternating output signals proportional in magnitude to the voltage provided to said load, 2. drive means connected to said primary circuit for generating said drive signals; b. an independently operable cutoff means associated with each of said power supplies, each receiving the alternating output signals from the secondary circuit of its associated power supply, each of said cutoff means including, 1. signal conditioning means for converting the received alternating signals to direct current, and 2. a comparator connected to said signal conditioning means for producing a shut-off signal representative of a power supply overvoltage condition when the value of the alternating output signals of an associated power supply secondary circuit exceed a predetermined value; and
,c. means for supplying said shut-off signal to the drive means of the associated power supply for inhibiting the application of drive signals to the switching means of the associated power supply whereby said associated power supply is turned off while permitting all other power supplies in the system to continue supplying power to said load. - View Dependent Claims (5, 6, 7)
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Specification