Power source device including a plurality of switching circuit for power conversion with switching elements used in common
First Claim
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1. A power source device comprising:
- at least first and second power converting circuits,said first power converting circuit including first switching means for opening and closing a current path in response to driving signals, a first rectifying means and a first inductor, and said second power converting circuit including second switching means for opening and closing a current path in response to the driving signals, a second rectifying means and a second inductor; and
a control circuit connected to the first and second power converting circuits for performing at least one of an inverse parallel connection of and a common use with the switching means incorporating a rectifying element of at least a set of the first switching means and second rectifying means and of the second switching means and first rectifying means, to generate at least one of the driving signals for closing the first switching means in a period in which the second rectifying means is conductive and for closing the second switching means in a period in which the first rectifying means is conductive in an event when neither of the inverse parallel connection and the common use is performed.
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Abstract
A power source device restricts any increase in a switching current to switching elements commonly used in two such different power source circuits as chopper and inverter circuits, while maintaining control independence of these circuits, by setting a period in which among currents flowing to the commonly used switching elements, the current flowing at least from one of the power source circuits has a polarity inverse to that of the current from at least the other power source circuit, to be in mutually cancelling directions.
8 Citations
25 Claims
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1. A power source device comprising:
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at least first and second power converting circuits, said first power converting circuit including first switching means for opening and closing a current path in response to driving signals, a first rectifying means and a first inductor, and said second power converting circuit including second switching means for opening and closing a current path in response to the driving signals, a second rectifying means and a second inductor; and a control circuit connected to the first and second power converting circuits for performing at least one of an inverse parallel connection of and a common use with the switching means incorporating a rectifying element of at least a set of the first switching means and second rectifying means and of the second switching means and first rectifying means, to generate at least one of the driving signals for closing the first switching means in a period in which the second rectifying means is conductive and for closing the second switching means in a period in which the first rectifying means is conductive in an event when neither of the inverse parallel connection and the common use is performed.
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2. A power source device comprising:
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at least first and second power converting circuits, said first power converting circuit having a closed loop including at least a first switching means used in common by the first and second power converting circuit, a power source and a first inductor, said first switching means having an inverse directional current-passing element connected in parallel, and said second power converting circuit having a closed loop including at least a second switching means used in common by the first and second power converting circuits, a load circuit, a second inductor and a capacitor, said second switching means having an inverse directional current-passing element connected in parallel; and a control means connected to the first and second power converting circuits for controlling the operation of the circuits by setting a period in which, among currents flowing from the first and second power converting circuits to the first and second switching means, the current from at least one of the first and second power converting circuits has an inverse polarity with respect to the current from at least the other power converting circuit, both currents flowing thus in mutually cancelling direction in the set period. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification