Method and supplying-end module for detecting receiving-end module
A technology for power supply modules and electrical modules, which is applied to electrical components, circuit devices, etc., can solve problems such as inability to judge the distance from the power receiving end, inability to effectively detect the power receiving end, and burning of the power receiving end.
Active Publication Date: 2018-03-23
FU TONG TECH
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Problems solved by technology
[0004] However, the above-mentioned operation of sending energy from the power supply to detect the power receiving end is accompanied by continuous energy transmission. If the transmitted energy is not received by the coil of the power receiving end, the problem of excessive electromagnetic interference (EMI) will easily occur.
When no power receiving end enters the coil induction range of the power supply end for a long time, continuous transmission of energy will cause excessive power loss
In addition, when the power receiving end is close to the power supply end, the power supply end cannot judge the distance from the power receiving end
If the power receiving end is close to the power supply end and the energy sent by the power supply end is too large, it may cause the power receiving end to receive too much energy instantly and burn out; if the power receiving end is far away from the power supply end and the energy sent by the power supply end is too small, then Unable to effectively detect the existence of the receiving end
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[0030] Please refer to figure 1 , figure 1 It is a schematic diagram of a power supply module 1 according to an embodiment of the present invention. The power supply module 1 can be used in an inductive power supply, and is used to send power to the power receiving module of the inductive power supply. The power supply module 1 includes a power supply coil 116 and a resonant capacitor 115 . Wherein, the power supply coil 116 can be used to transmit electromagnetic energy to the power receiving module for power supply, and the resonant capacitor 115 is coupled to the power supply coil 116 and can be used to cooperate with the power supply coil 116 for resonance. In addition, in the power supply module 1 , a magnetic conductor 117 made of magnetic material can be optionally used to enhance the electromagnetic induction capability of the power supply coil 116 and prevent electromagnetic energy from affecting objects in the direction of the non-inductive surface of the coil.
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A method of detecting a receiving-end module, for a supplying-end module of an induction type power supply system where the supplying-end module includes a supplying-end coil, includes detecting the supplying-end coil to obtain a self-resonant frequency of the supplying-end coil; determining whether the self-resonant frequency is smaller than a basic frequency; obtaining a first output power corresponding to the self-resonant frequency when the self-resonant frequency is determined to be smaller than the basic frequency and the degree of the self-resonant frequency smaller than the basic frequency exceeds a threshold; and sending an activation signal with the first output power, and starting to supply electric power when a data code corresponding to the activation signal is received.
Description
technical field [0001] The invention relates to a method for detecting a power receiving module and a power supply module, in particular to a method for detecting a power receiving module and the power supply module by detecting the distance of a coil. Background technique [0002] In the inductive power supply, in order to operate safely, it is necessary to confirm that the induction area on the power supply coil is the correct power receiving device at the supply end, and only transmit power when it can receive power. In order for the power supply end to identify the power receiving device Whether the terminal is a correct power receiving device needs to be identified through data code transmission. The transmission of the data code is to drive the power supply coil to generate resonance through the power supply end, and transmit the electromagnetic energy to the power receiving end for power transmission. When the power receiving end receives power, the impedance state on...
Claims
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Login to View More IPC IPC(8): H02J50/12H02J50/90
CPCH02J50/12H02J50/90
Inventor 蔡明球詹其哲
Owner FU TONG TECH