Wireless power transmission system and power transmitter
First Claim
1. A wireless power transmission system, comprising:
- a power transmitting section configured to convert DC energy input from a DC energy source into AC energy of a frequency f0, the power transmitting section comprising;
a class-E oscillator circuit including a switching element and a capacitor which are connected in parallel to the DC energy source, the class-E oscillator circuit configured to convert the DC energy into the AC energy; and
a switching control section configured to input a control signal for controlling a conduction state of the switching element to the switching element, and use the control signal to switch the switching element from a non-conductive state to a conductive state one of when a preset time period determined by a value of the frequency f0 has elapsed and when a potential difference across the switching element takes a local minimum value after the switching element is switched from the conductive state to the non-conductive state;
a transmitting antenna configured to transmit the AC energy converted by the power transmitting section;
a receiving antenna configured to receive and output at least part of the AC energy transmitted by the transmitting antenna, andan input control section configured to control a magnitude of the DC energy input to the power transmitting section in accordance with fluctuations in the AC energy output from the power transmitting section.
3 Assignments
0 Petitions
Accused Products
Abstract
A wireless power transmission system includes: a power transmitting section that converts DC energy input from a DC energy source into AC energy of a frequency f0; a transmitting antenna; and a receiving antenna. The power transmitting section includes: a class-E oscillator circuit including a switching element and a capacitor which are connected in parallel to the DC energy source, for converting the DC energy into the AC energy; and a switching control section that inputs a control signal for controlling a conduction state of the switching element to the switching element. The switching control section switches the switching element from a non-conductive state to a conductive state when a preset time period has elapsed or when a potential difference across the switching element takes a local minimum value after the switching element is switched from the conductive state to the non-conductive state.
8 Citations
9 Claims
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1. A wireless power transmission system, comprising:
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a power transmitting section configured to convert DC energy input from a DC energy source into AC energy of a frequency f0, the power transmitting section comprising; a class-E oscillator circuit including a switching element and a capacitor which are connected in parallel to the DC energy source, the class-E oscillator circuit configured to convert the DC energy into the AC energy; and a switching control section configured to input a control signal for controlling a conduction state of the switching element to the switching element, and use the control signal to switch the switching element from a non-conductive state to a conductive state one of when a preset time period determined by a value of the frequency f0 has elapsed and when a potential difference across the switching element takes a local minimum value after the switching element is switched from the conductive state to the non-conductive state; a transmitting antenna configured to transmit the AC energy converted by the power transmitting section; a receiving antenna configured to receive and output at least part of the AC energy transmitted by the transmitting antenna, and an input control section configured to control a magnitude of the DC energy input to the power transmitting section in accordance with fluctuations in the AC energy output from the power transmitting section. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power transmitter that converts DC energy input from a DC energy source into AC energy of a frequency f0, comprising:
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a class-E oscillator circuit including a switching element and a capacitor which are connected in parallel to the DC energy source, the class-E oscillator circuit configured to convert the DC energy into the AC energy; a switching control section configured to input a control signal for controlling a conduction state of the switching element to the switching element, the switching control section being configured to use the control signal to switch the switching element from a non-conductive state to a conductive state one of when a preset time period determined by a value of the frequency f0 has elapsed and when a potential difference across the switching element takes a local minimum value after the switching element is switched from the conductive state to the non-conductive state, and an input control section configured to control a magnitude of the input DC energy in accordance with fluctuations in the AC energy output from the oscillator circuit. - View Dependent Claims (9)
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Specification