Panasonic Intellectual Property Management Co., Ltd.

Hideo Oosumi

Hiroshi Kanno

Tsutomu Sakata

Hiroshi Yamamoto

Yoshinobu Ito

Tsumoto Sakata

A control method for a power transmitting device is provided, the power transmitting device including a power transmitting antenna, which transmits AC power wirelessly to the power receiving antenna of a power receiving device, and an oscillator. The method includes supplying pulse signals that control first and second switching element groups to the oscillator, and changing a phase shift amount between a first pulse signal and a second pulse signal. The method also includes causing the oscillator to change the voltage of the AC power output and to set an initial value of the phase shift amount. The method further includes causing the oscillator to output preliminary AC power of a voltage to reduce the phase shift amount from the initial value, fixing the phase shift amount, and causing the oscillator to output the AC power while maintaining the voltage corresponding to the fixed phase shift amount.

Power transmitting device and wireless power transmission system

A power transmitter apparatus of a wireless power transmitter apparatus transmits electric power from the power transmitter apparatus to a power reception apparatus by electromagnetically coupling a power transmitter apparatus resonance coil with a power reception apparatus resonance coil. The power transmitter apparatus includes a control signal detector portion that generates a control signal based on a voltage change of a voltage across both terminals of the power transmitter apparatus resonance coil and transmits the control signal; and a switching circuit that resonates the power transmitter apparatus resonance coil on the basis of the control signal.

Wireless power transmitter apparatus having power transmitter apparatus and power reception apparatus supplied with electric power energy via space

A wireless power transmitter apparatus is provided with: a power transmitter circuit having input terminals to which a DC power is inputted and output terminals from which the power transmitter circuit outputs the AC power and which supply the AC power to a power transmitting coil; a DC monitor circuit that monitors the DC power at the input terminals of the power transmitter circuit, and outputs a DC monitor signal indicating a change in a characteristic associated with the DC power; and a demodulator circuit that detects a load-modulated signal based on the DC monitor signal, demodulates the load-modulated signal, and outputs a first demodulated signal. The load-modulated signal is transmitted from the wireless power receiver apparatus to the wireless power transmitter apparatus by changing power consumption of the wireless power receiver apparatus.

Wireless power transmitter apparatus receiving load-modulated signal transmitted from wireless power receiver apparatus by changing power consumption of wireless power receiver apparatus

A power transmitting device according to one embodiment includes a power transmitting antenna, an oscillator, control circuitry, and a communication circuit. The control circuitry sets an initial value of a phase shift amount, causes the oscillator to output preliminary AC power of a voltage corresponding to the initial value, reduces the phase shift amount from the initial value at predetermined time intervals, causes the oscillator to output preliminary AC power of each voltage corresponding to each of the reduced phase shift amounts, fixes the phase shift amount upon activation of control circuitry in the power receiving device upon receipt of a first response signal indicating the activation of the control circuitry in the power receiving device from the power receiving device through the communication circuit, and transmits the AC power while maintaining the voltage corresponding to the fixed phase shift amount.

A multilayer PCB comprises vias for power-supply connected to power-supply wiring, vias for ground connected to ground wiring, ball pads for power-supply connected to balls for power-supply connected to power-supply wiring, and ball pads for ground connected to balls for ground connected to ground wiring. The vias for power-supply and the vias for ground are alternately arranged in a first direction. The vias for power-supply and the vias for ground are not alternately arranged in a second direction perpendicular to the first direction. The ball pads for power-supply and the ball pads for ground are alternately arranged in at least one of the first and second directions. Areas where the ball pads for power-supply and the ball pads for ground are provided are arranged on both sides in the second direction of an area where the vias for power-supply and the vias for ground are provided.

Growing community of inventors

Osaka, Japan

Hideo Oosumi