Loading patent…
AssigneeSeiko Epson Corporation
InventorTeruhiko Fujisawa
Estimating the term…
In a rectifier circuit that rectifies an alternating current voltage generated by a generator and supplies the alternating current voltage to a capacitor as a power storage unit, a plurality of level shifters supplies a voltage level-shifted by an offset voltage to respective comparators when the comparators corresponding to transistors perform an on-and-off control, based on voltages across terminals of each of a plurality of transistors forming the rectifier circuit. The offset voltage is set accounting for a response delay time of each comparator. Each transistor is reliably turned off at the time the transistor should be turned off in relation to the voltage across the output terminals of the generator. As a result, a reverse current from the capacitor is thus prevented. A delay in the timing of turning off each transistor is eliminated.
A power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch means that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the switch means, the power supplying device comprising:
A power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, each uni-direction unit allowing a current to flow from one terminal to the other terminal through the respective switch, the power supplying device comprising:
A power supplying device comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the respective switch, the power supplying device comprising:
A power supplying method for a power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, the power supplying device comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switching unit that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, each uni-direction unit allowing a current to flow from one terminal to the other terminal through the switching unit, and a storage unit, for storing power, arranged between the first power source line and the second power source line, wherein an operation for turning off the switching unit is started in advance according to a response delay time.
A power supplying method for a power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switching unit that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction units allowing a current to flow from one terminal to the other terminal through the switching unit, and a storage unit for storing power, arranged between the first power source line and the second power source line, wherein one terminal of a first uni-direction unit is connected to a first input terminal to which the alternating current voltage is supplied, the other terminal of the first uni-direction unit is connected to the first power source line, one terminal of a second uni-direction unit is connected to a second input terminal to which the alternating current voltage is supplied, the other terminal of the second uni-direction unit is connected to the first power source line, one terminal of a third uni-direction unit is connected to the second power source line, the other terminal of the third uni-direction unit is connected to the first input terminal, one terminal of a fourth uni-direction unit is connected to the second power source line, the other terminal of the fourth uni-direction unit is connected to the second input terminal, wherein an operation for turning off the switching units of at least two of the four uni-direction units is started with a duration in advance corresponding to a response delay time.
A power supplying method for a power supplying device comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switching unit that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the switching unit, and a first storage unit with one terminal thereof connected to a first input terminal to which an alternating current voltage is supplied, and a second storage unit with one terminal thereof connected to a second input terminal to which the alternating current voltage is supplied, wherein one terminal of a first uni-direction unit is connected to the other terminal of the first storage unit, the other terminal of the first uni-direction unit is connected to the first input terminal to which the alternating current voltage is supplied, one terminal of a second uni-direction unit is connected to the other terminal of the second storage unit, and the other terminal of the second uni-direction unit is connected to the other terminal of the first storage unit, wherein an operation for turning off the respective switching units for the first and second uni-direction units is started with a duration in advance, corresponding to a response delay time.
Dependencies are inferred from the claim text.