DC-DC converter having parallel converter circuits
First Claim
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1. A DC-DC converter connected between a dc power supply and a load, comprising:
- a first converter circuit which converts input voltage fed from said dc power supply according to a rapidly varying first command signal and generates a lower output voltage than said input voltage, said circuit having a pair of input terminals connected to said dc power supply and a pair of output terminals for outputting said output voltage; and
at least one second converter circuit which receives input voltage from said dc power supply and generates a constant output voltage converted at a given ratio, said second converter circuit having a pair of input terminals connected to said dc power supply and a pair of output terminals for outputting said constant output voltage;
said pairs of input terminals of said first and second converter circuits being connected in parallel to said dc power supply, and said output terminals of each circuit being connected in series to said load so that the sum of their output voltages is supplied to said load.
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Abstract
A DC-DC converter for outputting dc voltage whose peak value is higher than an input dc voltage value and high-frequency voltage corresponding to a command value is superimposed. An insulated switching power supply 27 and a series regulator 26 are connected in parallel to a dc power supply 1. The insulated switching power supply 27 generates output voltage V2 having a certain level, and the series regulator 26, output voltage V1 whose voltage varies depending on a command value (command voltage varying at a high frequency). Then, the sum of the output voltages V1 and V2 is fed to the load 9.
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Citations
8 Claims
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1. A DC-DC converter connected between a dc power supply and a load, comprising:
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a first converter circuit which converts input voltage fed from said dc power supply according to a rapidly varying first command signal and generates a lower output voltage than said input voltage, said circuit having a pair of input terminals connected to said dc power supply and a pair of output terminals for outputting said output voltage; and at least one second converter circuit which receives input voltage from said dc power supply and generates a constant output voltage converted at a given ratio, said second converter circuit having a pair of input terminals connected to said dc power supply and a pair of output terminals for outputting said constant output voltage; said pairs of input terminals of said first and second converter circuits being connected in parallel to said dc power supply, and said output terminals of each circuit being connected in series to said load so that the sum of their output voltages is supplied to said load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification