Supplying-end module of induction type power supply system and voltage measurement method thereof

Abstract

The present invention discloses a supplying-end module of an induction type power supply system and a voltage measurement method thereof. The voltage measurement method includes generating a coil signal on a supplying-end coil of the supplying-end module; clamping the coil signal to generate a clamp coil signal; performing signal processing on the clamp coil signal to generate a first signal and a second signal, respectively; generating a cycle signal, a frequency of which is equal to a frequency of the coil signal; comparing the first signal and the second signal via a comparator to obtain a first time and a second time when the first signal and the second signal have an equal voltage level during a cycle of the cycle signal; calculating a middle time of the first time and the second time; and sampling the clamp coil signal or the coil signal to obtain a peak voltage of the coil signal according to the middle time.

Description

technical field [0001] The invention relates to a power supply module of an inductive power supply and a voltage measurement method thereof, in particular to a power supply module of an inductive power supply and a method for measuring the coil voltage on the power supply coil of the power supply module. Background technique [0002] In an inductive power supply, the power supply terminal sends power by driving a resonant circuit composed of a resonant capacitor and a power supply coil with inductive characteristics to oscillate on the resonant circuit to generate a sine wave. The sine wave passes through the coil Send energy to the receiving end. The above-mentioned sine wave is an AC signal, and its amplitude determines the size of the power output. The larger the amplitude, the higher the output energy. [0003] Generally, the power supply end of the inductive power supply is controlled and regulated by the processor. The processor needs to obtain the amplitude of the s...

AI Technical Summary

Problems solved by technology

That is to say, the voltage value input to the analog-to-digital converter after rectification and filtering often cannot correctly reflect the magnitude of the AC signal on the coil

Another disadvantage is that the coil voltage detection circuit rectifies and filters the AC signal on the coil and then transmits it to the analog-to-digital converter for conversion. Among them, the filtering process will slow down the sampling speed, that is, the change of the AC signal requires After more cycles, there will be a response at the output of the coil voltage detection circuit

When the AC signal has a sudden amplitude change, it takes several cycles before it can be fully reflected on the output of the coil voltage detection circuit. In this case, the processor cannot immediately know the amplitude change of the coil signal and correct the output in time. power, making the system less efficient

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