Patent ID: 8772979
Filing Date: 2014-07-08
Classification: H02J

Abstract:
1. A method for power self-regulation in a high-power induction type power source, comprising the following steps: (a) switching on the power supply (PS) module and power receiving (PR) module, and initializing programs in the PS module; (b) delivering a detection signal and start-up power from the PS module to the PR module within the inductive range; (b1) PR module receiving the power start-up program in the detection signal and setting values as necessary; (b2) transmitting a start-up code from the PR module to the PS module; (b3) converting the voltage at the detection terminal into numerical value data; (b4) checking if the converted voltage value at the PR detection terminal exceeds the upper limit of the initial default values, if yes, proceed to step (b5); otherwise, proceed to step (b6); (b5) exceeding the upper limit, reconverting the voltage value, interrupting the power supply to the rear P-type MOFSET component and DC step-down transformer, and proceeding to step (b3) again, till the voltage value at the PR detection terminal is smaller than a preset lower limit, or power supply is interrupted and operation is terminated; (b6) transmitting codes of numerical value data on voltage from the PR module to the PS module; (b7) waiting for the PS module to regulate power; (b8) continuing another cycle of converting the voltage and transmitting data codes, till power supply is interrupted and operation is terminated, and proceed to step (b3); (c) checking if the PS module receives the start-up code; if yes, proceed to step (d); otherwise, proceed to step (c1); (c1) PR module not receiving the start-up code, PS module standing by to transmit a detection signal, and proceeding to step (b) again; (d) starting continuous power supply from the PS module and setting the initial time for the power supply; (e) converting the voltage of the power source into numerical value data; (f) PS timer of the PS microprocessor counting down to check if timing is over; if yes, proceeding to step (f1); otherwise, proceeding to step (g); (f1) PS microprocessor timing over, stopping continuous power supply and cutting off the output power to transmit detection signals instead; proceeding to step (f2); (f2) shutting down continuous power supply, removing indicative settings and proceeding to step (a); (g) checking if complete data are received from the PR module; if yes, proceeding to step (h); otherwise, proceeding to step (g1); (g1) checking if incomplete signals are received; proceeding to step (g2) in case of unclear signals; proceeding to step (g4) if there is no any signal; (g2) PR module not having sufficient receiving power and unable to feed back data codes clear enough to recognize if incomplete signals are received; (g3) PS module reducing its working frequency and increasing its output power to make the PR module feed back correct data codes, or until power supply timing is over; (g4) PS module not receiving incomplete signals, no data code transmitted, interrupting the power supply and proceed to step (f2); (h) comparing the voltage of the power source with that at the detection terminal of the PR module; proceeding to step (h1) if the voltage at the detection terminal is larger; proceeding to step (i) if the voltage of the power source is larger; (h1) the receiving power of the PR module is a little high if the voltage at the detection terminal is larger than that of the power source; (h2) increasing the working frequency to make the output power decrease; (i) the receiving power of the PR module is a little low if the voltage of the power source is larger than that at the detection terminal; (j) checking if the amplitude of the PS coil has reached the preset upper limit; if not, proceeding to step (k); if yes, proceeding to step (j1); (j1) has reached the maximum limit of output power, stopping power increases and proceeding to step (n); (k) checking if the working frequency in the previous markings has become lower than the maximum resonance point; if yes, proceeding to step (n); otherwise, proceeding to step (l); (l) reducing the working frequency and increasing the output power; (m) checking if the output amplitude of the PS coil increases following reduction of the working frequency; if yes, proceeding to step (n); otherwise, proceeding to step (m1); (m1) if the amplitude does not increase following reduction of working frequency, it shows that the working frequency has been lower than the maximum resonance point; make a mark here to indicate there is no need for frequency reduction next time; (n) power regulation completed; (o) timer of the PS module microprocessor filling in an initial constant of time and proceeding to step (e) following power regulation.