BIDIRECTIONAL NON-CONTACT POWER SUPPLY DEVICE AND BIDIRECTIONAL NON-CONTACT POWER SUPPLY SYSTEM
First Claim
Patent Images
1. :
- A bidirectional non-contact power supply device in which a self coil being coupled with an other coil through a magnetic field coupling therebetween for performing electric power transmission to the other coil or performing electric power reception from the other coil, and a capacitor being connected in series with the self coil are connected to a first input-output end in an inverter circuit;
a first input-output end in a bidirectional buck-boost converter is connected to a second input-output end in the inverter circuit; and
a DC power source is connected to a second input-output end in the bidirectional buck-boost converter, wherein in the bidirectional non-contact power supply device;
the bidirectional buck-boost converter includes an upper-stage semiconductor switching device used at a time of buck operation, and a lower-stage semiconductor switching device used at a time of boost operation;
the bidirectional buck-boost converter converts, at a time of electric power transmission, electric power supplied from the DC power source to a voltage of the DC power source or less whose voltage is inputted into the inverter circuit;
the bidirectional buck-boost converter converts, at a time of electric power reception, electric power outputted from the inverter circuit to an output voltage of the inverter circuit or more whose output voltage is supplied to the DC power source;
the bidirectional buck-boost converter controls, at a time of electric power reception, the lower-stage semiconductor switching device so that its duty ratio is gradually made smaller from a duty ratio at a time when the electric power reception starts; and
the bidirectional buck-boost converter controls, after electric output power to the DC power source reaches an instruction value determined in advance, the duty ratio of the lower-stage semiconductor switching device so that the electric output power thereto is maximized.
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Abstract
A bidirectional non-contact power supply device with its electric power transmission efficiency being high is obtained by a simple configuration. In the bidirectional non-contact power supply device, a coil is included for performing electric power transmission to and reception from another coil through a magnetic field coupling therebetween, and the coil and a capacitor being connected in series are connected on an input-output end of an inverter circuit, wherein a bidirectional buck-boost converter is connected between the inverter circuit and a DC power source (7).
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Citations
7 Claims
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1. :
- A bidirectional non-contact power supply device in which a self coil being coupled with an other coil through a magnetic field coupling therebetween for performing electric power transmission to the other coil or performing electric power reception from the other coil, and a capacitor being connected in series with the self coil are connected to a first input-output end in an inverter circuit;
a first input-output end in a bidirectional buck-boost converter is connected to a second input-output end in the inverter circuit; and
a DC power source is connected to a second input-output end in the bidirectional buck-boost converter, wherein in the bidirectional non-contact power supply device;the bidirectional buck-boost converter includes an upper-stage semiconductor switching device used at a time of buck operation, and a lower-stage semiconductor switching device used at a time of boost operation;
the bidirectional buck-boost converter converts, at a time of electric power transmission, electric power supplied from the DC power source to a voltage of the DC power source or less whose voltage is inputted into the inverter circuit;
the bidirectional buck-boost converter converts, at a time of electric power reception, electric power outputted from the inverter circuit to an output voltage of the inverter circuit or more whose output voltage is supplied to the DC power source;
the bidirectional buck-boost converter controls, at a time of electric power reception, the lower-stage semiconductor switching device so that its duty ratio is gradually made smaller from a duty ratio at a time when the electric power reception starts; and
the bidirectional buck-boost converter controls, after electric output power to the DC power source reaches an instruction value determined in advance, the duty ratio of the lower-stage semiconductor switching device so that the electric output power thereto is maximized. - View Dependent Claims (2, 3, 4, 7)
- A bidirectional non-contact power supply device in which a self coil being coupled with an other coil through a magnetic field coupling therebetween for performing electric power transmission to the other coil or performing electric power reception from the other coil, and a capacitor being connected in series with the self coil are connected to a first input-output end in an inverter circuit;
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5-6. -6. (canceled)
Specification