Converter circuit and motor driving apparatus
First Claim
1. A converter circuit having a pair of input terminals and a pair of output terminals, and boosting an AC voltage, said converter circuit comprising:
- a rectifier circuit for rectifying an output voltage of an AC power supply, which is input to the input terminals, and outputting the rectified voltage to the output terminals;
plural capacitors connected in series between the two output terminals; and
a switch circuit for switching the connections between the respective capacitors and the AC power supply so that the output voltage of the AC power supply is applied to each of the respective capacitors at a cycle shorter than the cycle of the AC power supply.
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Accused Products
Abstract
A converter circuit for converting an output voltage from an AC power supply is provided with a rectifier circuit for rectifying the output voltage of the AC power supply; first and second capacitors connected in series, for smoothing the output of the rectifier circuit; and a switch circuit for switching the connections between the respective capacitors and the AC power supply so that the output voltage of the AC power supply is applied to each of the respective capacitors at a cycle shorter than the cycle of the AC power supply.
70 Citations
35 Claims
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1. A converter circuit having a pair of input terminals and a pair of output terminals, and boosting an AC voltage, said converter circuit comprising:
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a rectifier circuit for rectifying an output voltage of an AC power supply, which is input to the input terminals, and outputting the rectified voltage to the output terminals;
plural capacitors connected in series between the two output terminals; and
a switch circuit for switching the connections between the respective capacitors and the AC power supply so that the output voltage of the AC power supply is applied to each of the respective capacitors at a cycle shorter than the cycle of the AC power supply. - View Dependent Claims (2, 3)
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4. A converter circuit having a pair of input terminals and a pair of output terminals, and boosting an AC voltage, said converter circuit comprising:
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a rectifier circuit for rectifying an output voltage of an AC power supply, which is applied to the input terminals, and outputting the rectified voltage to the output terminals;
a first capacitor connected between the output terminals;
a second capacitor having an end connected to one of the output terminals; and
a switch circuit for switching the connections between the other end of the second capacitor and the one and the other input terminals so that the output voltage of the AC power supply is applied to the second capacitor, while a sum voltage of the terminal voltage of the second capacitor and the output voltage of the AC power supply is applied to the first capacitor, at a cycle shorter than the cycle of the AC power supply. - View Dependent Claims (5, 6)
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7. A motor driving apparatus receiving an output voltage of an AC power supply, converting the output voltage of the AC power supply into a driving voltage, and outputting the driving voltage to a motor, said apparatus comprising:
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a converter circuit having a pair of input terminals and a pair of output terminals, and boosting the output voltage of the AC power supply;
an inverter circuit for converting an output voltage of the converter circuit into a three-phase AC voltage, and outputting the three-phase AC voltage as a driving voltage to the motor; and
said converter circuit comprising a rectifier circuit for rectifying the output voltage of the AC power supply, which is applied to the input terminals, and outputting the rectified voltage to the output terminals, plural capacitors connected in series between the output terminals, and a switch circuit for switching the connections between the respective capacitors and the AC power supply so that the output voltage of the AC power supply is applied to each of the plural capacitors at a cycle shorter than the cycle of the AC power supply. - View Dependent Claims (8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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9. A motor driving apparatus receiving an output voltage of an AC power supply, converting the output voltage of the AC power supply into a driving voltage, and outputting the driving voltage to a motor, said apparatus comprising:
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a converter circuit having a pair of input terminals and a pair of output terminals, and boosting the output voltage of the AC power supply;
an inverter circuit for converting an output voltage of the converter circuit into a three-phase AC voltage, and outputting the three-phase AC voltage as a driving voltage to the motor; and
said converter circuit comprising a rectifier circuit for rectifying an output voltage of an AC power supply, which is applied to the input terminals, and outputting the rectified voltage to the output terminals;
a first capacitor connected between the output terminals;
a second capacitor having an end connected to one of the output terminals; and
a switch circuit for switching the connections between the other end of the second capacitor and the one and the other input terminals so that the output voltage of the AC power supply is applied to the second capacitor, while a sum voltage of the terminal voltage of the second capacitor and the output voltage of the AC power supply is applied to the first capacitor, at a cycle shorter than the cycle of the AC power supply.
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Specification