Abstract: A resonant contactless electric energy transmitter configured to contactlessly supply electric energy to an electric energy receiver, can include: (i) a high frequency power supply configured to generate a high frequency AC power with a frequency that is the same as a leakage inductance resonant frequency, where the leakage resonant frequency is obtained by detection of an output current of the high frequency power supply that corresponds to the high frequency AC power of a sequence of different frequencies during a frequency sweeping time period; and (ii) a transmitting resonant circuit comprising a transmitting coil, and being configured to receive the high frequency AC power from the high frequency power supply.

Abstract: The present disclosure relates to a resonance-type contactless power supply and a power receiver. A high-frequency power supply provides a high-frequency AC current with a predetermined frequency. A transmitter-side resonant circuit includes a transmitting coil for receiving the high-frequency AC current from the high-frequency power supply. A receiver-side resonant circuit includes a receiving coil which is separated from but coupled to the transmitting coil in contactless manner. The receiver-side resonant circuit receives electric energy from the transmitting coil. A receiver-side parallel capacitor is connected in parallel at an output terminal of the receiver-side resonant circuit. The receiver-side parallel capacitor has a capacitance value which is in inversely proportional to the product of a square of an angular frequency of the predetermined frequency and a predetermined mutual inductance.

Abstract: An isolated converter with switched capacitors can include: a first capacitor; a first group of switches coupled between two terminals of an input port, where the first group of switches is configured to selectively couple a first terminal of the first capacitor to one of a first terminal and a second terminal of the input port; a second group of switches coupled between two terminals of an output port, where the second group of switches is configured to selectively couple a second terminal of the first capacitor to one of a first terminal and a second terminal of the output port; and a second capacitor coupled between one of the first and second terminals of the input port and one of the first and second terminals of the output port.

Abstract: A passive boost network configured to boost and output an AC power signal having a predetermined frequency, can include: an input port; an output port configured to provide the AC power signal; first and second passive components coupled in series between first and second terminals of the input port; a third passive component coupled in series with the second passive component between first and second terminals of the output port; and where the first passive component is one of a capacitor and an inductor, and the second and third passive components are each the other of the capacitor and the inductor.

Abstract: A resonant contactless electric energy transmitter configured to contactlessly supply electric energy to an electric energy receiver, can include: (i) a high frequency power supply configured to generate a high frequency AC power with a frequency that is the same as a leakage inductance resonant frequency, where the leakage inductance resonant frequency is obtained by detection of an output current of the high frequency power supply that corresponds to the high frequency AC power of a sequence of different frequencies during a frequency sweeping time period; and (ii) a transmitting resonant circuit comprising a transmitting coil, and being configured to receive the high frequency AC power from the high frequency power supply.

Abstract: A power receiving device of a contactless power supply configured in a wearable electronic device having a main body coupled to a wearing member, can include: a power receiving antenna including a receiving coil; a conducting wire of the receiving coil that substantially extends along a plane in which the wearing member and the main body are disposed; where the receiving coil is formed when the wearing member is coupled with the main body as a ring shape; and where an axial direction of the receiving coil passes through the ring shape.

Abstract: A power receiving device of a contactless power supply configured in a wearable electronic device having a main body coupled to a wearing member, can include: a power receiving antenna including one or more coils at least partially disposed on the wearing member; and where wires of the receiving coils extend substantially along a surface of a wearing member to form a coil turn that crosses through the surface of the wearing member or a surface of the main body in an axial direction.

Abstract: A power transmitting device for a contactless power supply, can include: a power transmitting antenna having a plurality of transmitting coils; where each of the plurality of transmitting coils comprises a coil turn or a plurality of concentric coil turns with a substantially coplanar setting and having a coil surface; where an axis of each of the plurality of transmitting coils is axially perpendicular to the power transmitting antenna; and where the axis of each of the plurality of transmitting coils forms a predetermined angle with respect to each other.

Abstract: The present disclosure relates to a power receiver, a resonance-type contactless power supply and a control method. The power converter is coupled between a receiver-side resonant circuit and a load, and is controlled to adjust a current strength parameter of a high-frequency AC current output from the receiver-side resonant circuit, so that a first current strength parameter, which is a peak or an effective value of a current flowing through a transmitting coil, and a second strength parameter, which is a peak or an effective value of a current flowing through a receiving coil, have a predetermined relationship, and a load impendence of an equivalent load is adjusted, and thus system efficiency is optimized.

Abstract: A synchronous rectifier circuit can include: a full-bridge rectifier circuit having first, second, third, and fourth switches, where a common node of the first and fourth switches is configured as a first input terminal of the synchronous rectifier circuit, and a common node of the second and third switches is configured as a second input terminal of the synchronous rectifier circuit; a switching control circuit configured to generate a first control signal to control the first and third switches, and a second control signal to control the second and fourth switches; and the switching control circuit being configured to self-adjust the first and second control signals to control operating points of the first, second, third, and fourth switches to be approximately ideal operating points.

Abstract: The present disclosure relates to a power receiver, a resonance-type contactless power supply and a control method. The power converter is coupled between a receiver-side resonant circuit and a load, and is controlled to adjust a current strength parameter of a high-frequency AC current output from the receiver-side resonant circuit, so that a first current strength parameter, which is a peak or an effective value of a current flowing through a transmitting coil, and a second strength parameter, which is a peak or an effective value of a current flowing through a receiving coil, have a predetermined relationship, and a load impendence of an equivalent load is adjusted, and thus system efficiency is optimized.

Abstract: A wireless LED driver can include: an electrical energy transmitter comprising an inverter circuit coupled to receive an input power supply, and being configured to convert a received voltage signal to an AC signal; the electrical energy transmitter comprising N transmitter coupling circuits coupled to the inverter circuit, and being configured to be driven by the AC signal; an electrical energy receiver comprising M receiver coupling circuits coupled to the transmitter coupling circuits in a contactless mode, and being configured to receive the AC signal; and the electrical energy receiver comprising M rectifier circuits coupled to the receiver coupling circuits one by one, where each the rectifier circuit is configured to convert the AC signal to a DC signal to drive an LED load coupled to output terminals of the rectifier circuit, and where N and M are integers not less than 1.

Abstract: A wireless LED driver can include: an electrical energy transmitter comprising an inverter circuit coupled to receive an input power supply, and being configured to convert a received voltage signal to an AC signal; the electrical energy transmitter comprising N transmitter coupling circuits coupled to the inverter circuit, and being configured to be driven by the AC signal; an electrical energy receiver comprising M receiver coupling circuits coupled to the transmitter coupling circuits in a contactless mode, and being configured to receive the AC signal; and the electrical energy receiver comprising M rectifier circuits coupled to the receiver coupling circuits one by one, where each the rectifier circuit is configured to convert the AC signal to a DC signal to drive an LED load coupled to output terminals of the rectifier circuit, and where N and M are integers not less than 1.

Abstract: A daily electricity generation planning method of a cascade hydropower plants is disclosed, and the method is comprised of the steps as follows: step 1, regardless of the constraints for opening and closing the generator, taking the power similarity between the power plant group and the typical demand as one of optimization objectives, and performing a first optimization to obtain a daily electricity generation plan; step 2, according to the derived daily electricity generation plan, determining an opening and closing status for the generator; and step 3, considering the constraints for opening and closing the generator, taking the power similarity between the power plant group and the typical demand as the optimization objective, performing a second optimization to obtain the daily electricity generation plan.

Abstract: The present disclosure relates to a driving circuit and a wireless power transmitter including the same. N+1 half-bridge circuits constitute N full-bridge circuits by reusing the half-bridge circuits, so as to drive a plurality of coils for wirelessly charging a plurality of loads.

Abstract: The present disclosure relates to a driving circuit and a wireless power transmitter including the same. In view of the fact that a transmitter-side coupling circuit exhibits a high resistance when an AC current having a frequency far away from its operating frequency is applied to input terminals, the present disclosure connects a plurality of transmitter-side coupling circuits which operates at different operating frequencies in parallel at output terminals of the same inverting circuit. The controller controls an operating frequency of the AC current output from the inverting circuit to drive different one of the transmitter-side coupling circuits to operate. Thus, one driving circuit can drive the transmitter-side coupling circuits which operate at different operating frequencies or under different technical standards to supply electric energy. The driving circuit is compatible with wireless power receivers which operate at different operating frequencies, and thus has improved compatibility.

Abstract: The present disclosure relates to a power transmitter, a resonance-type contactless power supply and a control method. The inverter circuit is controlled to provide a high-frequency AC current with a voltage strength parameter so that a current strength parameter (e.g. a peak value or an effective value of the current) of the AC current flowing through a transmitting coil and that through a receiving coil have a predetermined relationship. Thus, an equivalent load impedance is adjusted so that the system efficiency is optimized.

Abstract: The present disclosure relates to a power transmitter, a resonance-type contactless power supply and a control method. The resonance-type contactless power supply adjusts a phase difference of an inverter control signal in a current cycle in a manner the same as that in a previous cycle in a case that a power parameter in the current cycle and that in the previous cycle satisfy a predetermined relationship, and adjusts the phase difference of the inverter control signal in the current cycle in a manner opposite to that in the previous cycle in a case that the power parameter in the current cycle and that in the previous cycle don't satisfy the predetermined relationship. The power parameter represents system efficiency. Thus, a suitable input current or voltage of the transmitter-side resonant circuit is determined by scanning actually, so that the system can operate at optimal efficiency.

Abstract: A method of forming a current diffusion layer is provided that comprises providing an epitaxial wafer. The method further comprises depositing ITO source material on the epitaxial wafer to form a base ITO layer by a direct current electron gun and depositing ZnO source material, during simultaneous deposition of the ITO source material, on the base ITO layer to form a ZnO doped ITO layer by a pulse current electron gun. The ZnO source material is deposited at a deposition rate higher than the rate at which the ITO source material is deposited. Generation and termination of current may be controlled by adjusting a duty cycle of pulse current provided by the pulse current electron gun and result in discontinuous deposition of the ZnO source material. The method further comprises depositing the ITO source material on the ZnO doped ITO layer to cover the ZnO doped ITO layer and form a finished ITO layer.

Abstract: The present disclosure relates to a resonance-type contactless power supply, an integrated circuit and a constant voltage control method. The resonance-type contactless power supply includes an inverter, a transmitter-side resonant circuit, a receiver-side resonant circuit, a rectifier circuit, and an output capacitance. In this resonance-type contactless power supply, the inverter receives electric energy, which is transferred to the rectifier circuit in a first state and is not transferred to the rectifier circuit in a second state. By switching between the first state and the second state, the resonance-type contactless power supply is controlled to provide a relatively constant voltage, and can be electrically coupled directly to a constant-voltage-type load.