Wireless power supply receiver-transmitter device, wireless power supply receiver and wireless power supply transmitter
First Claim
Patent Images
1. A wireless power supply receiver-transmitter device comprising:
- a wireless power supply receiver including a power receiver unit and a first data transmitter/receiver unit;
a wireless power supply transmitter including a power transmitter unit and a second data transmitter/receiver unit; and
a feedback unit configured to detect a state of coupling between the power receiver unit and the power transmitter unit, the feedback unit configured to terminate the power transmission from the power transmitter unit to the power receiver unit and further configured to disconnect data communications between the first data transmitter/receiver unit and the second data transmitter/receiver unit if a voltage higher than a predetermined voltage is detected in the power transmitter unit side, whereinthe power transmitter unit uses a gallium nitride based field effect transistor as a switching device for driving a primary-side coil, whereinmaximum transmitting efficiency η
max is expressed with the following equation;
η
max=α
/[1+(1+α
)1/2]2 where α
is a coil parameter, and the coil parameter α
is equal to or greater than approximately 104;
the wireless power supply receiver wirelessly receives electric power transmitted through a secondary-side coil corresponding to the primary-side coil of the wireless power supply transmitter, and the first data transmitter/receiver unit operates with the electric power transmitted from the wireless power supply transmitter and transmits and receives data bidirectionally to/from the second data transmitter/receiver unit, whereinthe feedback unit is configured to detect the state of coupling between the power receiver unit and the power transmitter unit by determining a coupling factor between the power receiver unit and the power transmitter unit on the basis of at least one of a current flowing into the secondary-side coil and a voltage applied thereon;
wherein the wireless power supply receiver comprises;
a power receiver unit configured to wirelessly receive electric power transmitted from a wireless power supply transmitter, the power receiver unit comprising;
a secondary-side coil;
a secondary-side resonance capacitor connected to the secondary-side coil, the secondary-side resonance capacitor configured to be tuned with the secondary-side coil in a predetermined wireless power transmission carrier frequency band;
a diode bridge circuit connected to the secondary-side resonance capacitor, the diode bridge having a positive output and a negative output;
a first data transmitter/receiver unit configured to bidirectionally transmit and receive data through the optical communications to/from the wireless power supply transmitter, whereina regulator circuit configured to output a predetermined voltage used for monitoring a power consumption state in the power receiver unit side;
a protective transistor, a drain of the protective transistor being connected to the positive output of the diode bridge;
a first resistor having a first end connected to a source of the protective transistor and a second end connected to the negative output of the diode bridge;
a Zener diode having a cathode and an anode, the cathode of the Zener diode being connected to the positive output of the diode bridge, and an anode of the Zener diode being connected to the gate of the protective transistor;
a second resistor having a first end connected to the anode of the Zener diode and the gate of the protective transistor and a second end connected to a negative output of the diode bridge.
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Accused Products
Abstract
There is provided a power supply receiver-transmitter device, a wireless power supply receiver, and a wireless power supply transmitter which allow wireless power supply transmission and wireless data transmission and reception, and improve the usability thereof. The wireless power supply receiver-transmitter device includes: a wireless power supply receiver (PR) including a power receiver unit (RU) and a first data transmitter/receiver unit (DRU); a wireless power supply transmitter (PT) including a power transmitter unit (TU); and a second data transmitter/receiver unit (DTU). The wireless power supply receiver (PR) wirelessly receives electric power transmitted from the wireless power supply transmitter (PT), and the first data transmitter/receiver unit (DRU) bidirectionally transmits and receives data to/from the second data transmitter/receiver units (DTU) through optical communications.
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Citations
23 Claims
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1. A wireless power supply receiver-transmitter device comprising:
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a wireless power supply receiver including a power receiver unit and a first data transmitter/receiver unit; a wireless power supply transmitter including a power transmitter unit and a second data transmitter/receiver unit; and a feedback unit configured to detect a state of coupling between the power receiver unit and the power transmitter unit, the feedback unit configured to terminate the power transmission from the power transmitter unit to the power receiver unit and further configured to disconnect data communications between the first data transmitter/receiver unit and the second data transmitter/receiver unit if a voltage higher than a predetermined voltage is detected in the power transmitter unit side, wherein the power transmitter unit uses a gallium nitride based field effect transistor as a switching device for driving a primary-side coil, wherein maximum transmitting efficiency η
max is expressed with the following equation;
η
max=α
/[1+(1+α
)1/2]2where α
is a coil parameter, and the coil parameter α
is equal to or greater than approximately 104;the wireless power supply receiver wirelessly receives electric power transmitted through a secondary-side coil corresponding to the primary-side coil of the wireless power supply transmitter, and the first data transmitter/receiver unit operates with the electric power transmitted from the wireless power supply transmitter and transmits and receives data bidirectionally to/from the second data transmitter/receiver unit, wherein the feedback unit is configured to detect the state of coupling between the power receiver unit and the power transmitter unit by determining a coupling factor between the power receiver unit and the power transmitter unit on the basis of at least one of a current flowing into the secondary-side coil and a voltage applied thereon; wherein the wireless power supply receiver comprises; a power receiver unit configured to wirelessly receive electric power transmitted from a wireless power supply transmitter, the power receiver unit comprising; a secondary-side coil; a secondary-side resonance capacitor connected to the secondary-side coil, the secondary-side resonance capacitor configured to be tuned with the secondary-side coil in a predetermined wireless power transmission carrier frequency band; a diode bridge circuit connected to the secondary-side resonance capacitor, the diode bridge having a positive output and a negative output; a first data transmitter/receiver unit configured to bidirectionally transmit and receive data through the optical communications to/from the wireless power supply transmitter, wherein a regulator circuit configured to output a predetermined voltage used for monitoring a power consumption state in the power receiver unit side; a protective transistor, a drain of the protective transistor being connected to the positive output of the diode bridge; a first resistor having a first end connected to a source of the protective transistor and a second end connected to the negative output of the diode bridge; a Zener diode having a cathode and an anode, the cathode of the Zener diode being connected to the positive output of the diode bridge, and an anode of the Zener diode being connected to the gate of the protective transistor; a second resistor having a first end connected to the anode of the Zener diode and the gate of the protective transistor and a second end connected to a negative output of the diode bridge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A wireless power supply receiver comprising:
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a power receiver unit configured to wirelessly receive electric power transmitted from a wireless power supply transmitter, the power receiver unit comprising; a secondary-side coil; a secondary-side resonance capacitor connected to the secondary-side coil, the secondary-side resonance capacitor configured to be tuned with the secondary-side coil in a predetermined wireless power transmission carrier frequency band; a diode bridge circuit connected to the secondary-side resonance capacitor, the diode bridge having a positive output and a negative output; a first data transmitter/receiver unit configured to bidirectionally transmit and receive data through the optical communications to/from the wireless power supply transmitter, wherein a regulator circuit configured to output a predetermined voltage used for monitoring a power consumption state in the power receiver unit side; a protective transistor, a drain of the protective transistor being connected to the positive output of the diode bridge; a first resistor having a first end connected to a source of the protective transistor and a second end connected to the negative output of the diode bridge; and a Zener diode having a cathode and an anode, the cathode of the Zener diode being connected to the positive output of the diode bridge, and an anode of the Zener diode being connected to the gate of the protective transistor; a second resistor having a first end connected to the anode of the Zener diode and the gate of the protective transistor and a second end connected to a negative output of the diode bridge; a feedback unit configured to detect a state of coupling between the power receiver unit and a power transmitter unit in the wireless power supply transmitter by determining a coupling factor between the power receiver unit and the power transmitter unit on the basis of at least one of a current flowing into the secondary-side coil and a voltage applied thereon, the feedback unit further configured to terminate the power transmission from the power transmitter unit to the power receiver unit and further configured to disconnect data communications between the first data transmitter/receiver unit and the second data transmitter/receiver unit if a voltage higher than a predetermined voltage is detected in the power transmitter unit side;
whereinthe power transmitter unit uses a gallium nitride based field effect transistor as a switching device for driving a primary-side coil, and maximum transmitting efficiency η
max is expressed with the following equation;
η
max=α
/[1+(1+α
)1/2]2where α
is a coil parameter, and the coil parameter α
is equal to or greater than approximately 104. - View Dependent Claims (19, 20, 21, 22)
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23. A wireless power supply receiver comprising:
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a power receiver unit configured to wirelessly receive electric power transmitted from a wireless power supply transmitter, the power receiver unit comprising; a secondary-side coil; a secondary-side resonance capacitor connected to the secondary-side coil, the secondary-side resonance capacitor configured to be tuned with the secondary-side coil in a predetermined wireless power transmission carrier frequency band; a diode bridge circuit connected to the secondary-side resonance capacitor, the diode bridge having a positive output and a negative output; a first resistor having a first end connected to the positive output of the diode bridge and a second end connected to the negative output of the diode bridge; a first capacitor having a first end connected to the positive output of the diode bridge and a second end connected to the negative output of the diode bridge; a first data transmitter/receiver unit configured to bidirectionally transmit and receive data through the optical communications to/from the wireless power supply transmitter, wherein a regulator circuit configured to output a predetermined voltage used for monitoring a power consumption state in the power receiver unit side; a resistor disposed between the diode bridge circuit and the regulator circuit, the resistor used for converting excess power into a heat by feeding the excess power thereto if the excess power from the wireless power supply transmitter is received by the wireless power supply receiver; and a feedback unit configured to detect a state of coupling between the power receiver unit and a power transmitter unit in the wireless power supply transmitter by determining a coupling factor between the power receiver unit and the power transmitter unit on the basis of at least one of a current flowing into the secondary-side coil and a voltage applied thereon, the feedback unit further configured to terminate the power transmission from the power transmitter unit to the power receiver unit and further configured to disconnect data communications between the first data transmitter/receiver unit and the second data transmitter/receiver unit if a voltage higher than a predetermined voltage is detected in the power transmitter unit side;
whereinthe power transmitter unit uses a gallium nitride based field effect transistor as a switching device for driving a primary-side coil, and maximum transmitting efficiency η
max is expressed with the following equation;
η
max=α
/[1+α
)1/2]2where α
is a coil parameter, and the coil parameter α
is equal to or greater than approximately 104.
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Specification
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Current AssigneeROHM Co., Ltd.
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Original AssigneeROHM Co., Ltd.
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InventorsNakahara, Ken, Kitagawa, Masayuki
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Primary Examiner(s)VANDERPUYE, KENNETH N
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Assistant Examiner(s)Lee, Jai
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Application NumberUS14/038,174Publication NumberTime in Patent Office1,496 DaysField of SearchNoneUS Class CurrentCPC Class CodesH02J 50/12 of the resonant typeH02J 50/80 involving the exchange of d...H02J 50/90 involving detection or opti...H02J 7/00034 Charger exchanging data wit...H04B 10/40 TransceiversH04B 10/807 Optical power feeding, i.e....H04B 5/72 for local intradevice commu...H04B 5/79 for data transfer in combin...
