发明申请
- 专利标题: IMPEDANCE CHANGE DETECTION IN WIRELESS POWER TRANSMISSION
- 专利标题(中): 无线电力传输中的阻抗变化检测
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申请号: US12641219申请日: 2009-12-17
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公开(公告)号: US20100217553A1公开(公告)日: 2010-08-26
- 发明人: William Von Novak , Stanley S. Toncich , Roberto Rimini , Kevin D. Lee
- 申请人: William Von Novak , Stanley S. Toncich , Roberto Rimini , Kevin D. Lee
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM INCORPORATED
- 当前专利权人: QUALCOMM INCORPORATED
- 当前专利权人地址: US CA San Diego
- 主分类号: G06F19/00
- IPC分类号: G06F19/00 ; G01R27/00
摘要:
Exemplary embodiments are directed to wireless power transfer. Energy from a transmit antenna is coupled to internal signals on a transmitter. An impedance measurement circuit generates an impedance indication signal for indicating an impedance difference between the coupled internal signals by comparing them. A controller samples the impedance indication signal and determines digital signaling values responsive to changes in the impedance indication signal. The impedance measurement circuit measures one or more of magnitude difference of the internal signals, phase difference of the internal signals, and changes in power consumed by an amplifier coupled between the RF signal and the transmit antenna. A transmitter generates the electromagnetic field with a transmit antenna responsive to a Radio Frequency (RF) signal to create a coupling-mode region within a near field of the transmit antenna.
公开/授权文献
- US09136914B2 Impedance change detection in wireless power transmission 公开/授权日:2015-09-15