Bidirectional switching power apparatus with AC or DC output
First Claim
1. Switching power apparatus, comprising:
- a pair of inputs with a DC input voltage appearing thereacross;
a first and second capacitive means coupled to ground for storing a first and second voltages respectively;
an inductive means coupled to one input for attaining a current;
a first switching means coupled to the other input for selectively applying the DC input voltage across the inductive means;
a second switching means for selectively applying the current to ground;
a diode means for applying the current to the first capacitive means; and
an amplifier means for converting the first and second voltages into an output signals,wherein the DC input voltage is referenced to the second voltage.
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Abstract
The bidirectional switching power apparatus converts DC input voltage into single AC or multiple DC output voltages. Power transformer is used if line isolation is necessary. Number of switching components and peak currents thereof are minimal. The DC input voltage is lower than the AC or DC output voltages. The switching power apparatus has a first and second capacitors coupled to ground for storing a first and second voltages respectively. One switch selectively applies the DC input voltage across an inductor which attains a current. Another switch selectively applies the current to ground. A diode applies the current to the first capacitor. An amplifier converts the first and second voltages into the AC output signal. Two other diodes apply the second voltage and AC output signal to a node. The DC input voltage is referenced to the node rather than ground.
44 Citations
20 Claims
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1. Switching power apparatus, comprising:
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a pair of inputs with a DC input voltage appearing thereacross; a first and second capacitive means coupled to ground for storing a first and second voltages respectively; an inductive means coupled to one input for attaining a current; a first switching means coupled to the other input for selectively applying the DC input voltage across the inductive means; a second switching means for selectively applying the current to ground; a diode means for applying the current to the first capacitive means; and an amplifier means for converting the first and second voltages into an output signals, wherein the DC input voltage is referenced to the second voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Switching power apparatus converting DC input voltage into first and second DC output voltages having opposite polarities, comprising:
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a pair of inputs with the DC input voltage appearing thereacross; a first and second capacitive means coupled to ground for storing the first and second DC outputs voltages respectively; an inductive means coupled to one input for attaining a current; a first switching means coupled to the other input for selectively applying the DC input voltage across the inductive means; a second switching means for selectively applying the current to ground; and a diode means for applying the current to the first capacitive means, wherein the DC input voltage is referenced to the second DC output voltage. - View Dependent Claims (14, 15, 16)
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17. Switching power apparatus converting DC input voltage into multiple DC output voltages, comprising:
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a pair of inputs with the DC input voltage appearing thereacross; a plurality of terminals with the DC output voltages appearing thereat; a plurality of capacitive means coupled in series between a pair of the terminals for storing voltages and with any other terminal separately coupled to a pair of the capacitive means; an inductive means coupled to one input for attaining a current; a switching means coupled to the other input for selectively applying the DC input voltage across the inductive means; at least one additional switching means each for selectively applying the current to one of the terminals except for any terminal of the pair of the terminals; and a diode means for applying the current to one terminal of the pair of the terminals, wherein the DC input voltage is referenced to the other terminal of the pair of the terminals, and further wherein any one of the terminals is coupled to ground. - View Dependent Claims (18, 19, 20)
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Specification