Self-oscillating system for wireless power transmission and method of implementing the same

A self-oscillating system for wireless power transmission;

• said self-oscillating system comprising:
• a. a power amplifier connectable to a power source;
• b. at least one wireless coupling arrangement energized by said power amplifier;
• said coupling arrangement comprising two parallel branches having transmitting TX and receiving RX sections each, and operated in anti-phase;
• each TX section further comprising a transmitting coupling device and a transmitting member;
• each RX section further comprising a receiving coupling device and a receiving member;
• said transmitting and receiving members being divided by an air gap;
• said two parallel branches being connected to a load;
• wherein said self-oscillating system comprises a feedback mechanism;
• said power amplifier, coupling arrangement, and said feedback mechanism forming a closed self-oscillating loop;
• said wireless power transmitting self-oscillating system further comprising
• a main computer unit,
• at least one first sensor configured for detecting a value of power transmitted to said load, and
• a voltage-controlled frequency-selective filter positioned at the input port of the power amplifier within said self-oscillating loop, configured for selecting an oscillation frequency and scanning an operational frequency in a single-frequency operation mode;
• the feedback signal received on the TX side is fed via the voltage-controlled frequency-selective filter to the input port of the power amplifier;
• the output signal from the voltage-controlled frequency-selective filter is fed to the amplifier;
• said main computer unit is configured for interrogating said value of transmitted power to said load power and generating and transmitting a first control signal to said voltage-controlled frequency-selective filter for selecting said operational frequency corresponding to maximal said transferred transmitted power and maintaining said operational frequency thereat.

A method of wireless power transmission comprising steps of:

• a. providing a self-oscillating system for wireless power transmission;
• said system comprising:
• i. a power amplifier connectable to a power source;
• ii. at least one coupling arrangement energized by said power amplifier;
• said coupling arrangement comprising two parallel branches operating in anti-phase and having transmitting TX and receiving RX sections each;
• each TX section further comprising a transmitting device and a transmitting member;
• each RX section further comprising a receiving device and a receiving member;
• said transmitting and receiving members being divided by an air gap;
• said two parallel branches being connected to a load;
• said self-oscillating system comprises a feedback mechanism;
• said power amplifier, coupling arrangement, and said feedback mechanism forming a closed self-oscillating loop;
• said self-oscillating system further comprising a main computer unit, at least one first sensor configured for detecting a value of power transmitted to said load, and a voltage-controlled frequency-selective filter positioned at the input port of the power amplifier within said self-oscillating loop, configured for selecting an oscillation frequency and scanning an operational frequency in a one-frequency operation mode;
• the feedback signal received on the TX side is fed via the frequency-selective filter to the input port of the power amplifier;
• the output signal from the frequency-selective filter is fed to the amplifier;
• said main computer unit is configured for interrogating said value of transmitted power and generating and transmitting a first control signal to said voltage-controlled frequency-selective filter for searching and selecting said operational frequency corresponding to said maximal transferred power and maintaining said operation frequency thereat;
• b. energizing said power amplifier from said power source;
• c. establishing said self-oscillating mode;
• d. searching scanning said operational frequencies corresponding to local maximal transferred power values;
• e. selecting a global-maximum frequency corresponding to a global maximum of said transmitted power values;
• f. maintaining said global-maximum frequency;
• g. periodically recurring steps d and e.