Controller of power supplying apparatus with short circuit preventing means
First Claim
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1. A controller of power supplying apparatus for controlling a power supplying apparatus which supplies power to a load by having switching elements connected in series with the power supply alternately perform switching operations comprising:
- command means for outputting a timing signal, when said switching means are to perform the switching operations, to command the switching operations to be started;
short-circuit prevention means for outputting, upon outputting of the timing signal from said command means, a short-circuit preventing signal until a preset short-circuit preventing period of time elapses; and
control means for bringing, upon outputting of the timing signal from said command means, one of said switching elements which is in the conductive state into the non-conductive state and, in the meantime, bringing the other switching element which is in the non-conductive state into an intermittently conductive state until said short-circuit prevention means stops the outputting of the short-circuit preventing signal and, thereafter, holding the switching element in the conductive state.
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Abstract
The controller of power supplying apparatus, upon outputting of a timing signal from a timer, brings a switching element, which is in the conductive state, into the non-conductive state and, in the meantime, brings a switching element, which is in the non-conductive state, into an intermittently conductive state until a NAND circuit stops outputting a short-circuit preventing signal and, thereafter, holds the switching element in the conductive state.
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6 Claims
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1. A controller of power supplying apparatus for controlling a power supplying apparatus which supplies power to a load by having switching elements connected in series with the power supply alternately perform switching operations comprising:
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command means for outputting a timing signal, when said switching means are to perform the switching operations, to command the switching operations to be started;
short-circuit prevention means for outputting, upon outputting of the timing signal from said command means, a short-circuit preventing signal until a preset short-circuit preventing period of time elapses; and
control means for bringing, upon outputting of the timing signal from said command means, one of said switching elements which is in the conductive state into the non-conductive state and, in the meantime, bringing the other switching element which is in the non-conductive state into an intermittently conductive state until said short-circuit prevention means stops the outputting of the short-circuit preventing signal and, thereafter, holding the switching element in the conductive state. - View Dependent Claims (2, 3, 4, 5, 6)
selection means for selecting the inverting period of the short-circuit preventing signal outputted from said short-circuit prevention means.
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4. A controller of power supplying apparatus according to claim 2, further comprising:
a timer for setting the inverting period of the short-circuit preventing signal outputted from said short-circuit prevention means.
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5. A controller of power supplying apparatus according to claim 2, further comprising:
a pulse-width modulation timer for setting the duty cycle of the short-circuit preventing signal outputted from said short circuit prevention means.
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6. A controller of power supplying apparatus according to claim 1, further comprising:
setting means for setting the short-circuit preventing period of time.
Specification