Mitsubishi Electric Corporation

Mitsubishi Electric Home Appliance Co., Ltd.

Hirohisa Kuwano

Ikuro Suga

Tetsuya Matsuda

Takayoshi Nagai

Tomokazu Sakashita

Miyuki Takeshita

Yusuke Naruse

Jun Bunya

Ryota Asakura

Kazuhiro Kameoka

Hidehito Yoshida

Takuya Miura

Mariko Nakagawa

A wireless power supply system for elevators includes a power transmitting device, first and second power receiving devices provided in the first and second elevator cars respectively, and a control device. The power transmitting device includes power transmitting units each having an inverter and two power transmitter coils. The first power receiving device includes first power receiving units each having a rectifier circuit and a power receiver coil that can be coupled with one of the two power transmitter coils. The second power receiving device includes second power receiving units each having a rectifier circuit and a power receiver coil that can be coupled with the other of the two power transmitter coils. The power transmitting device, or the first and second power receiving devices include switches to disconnect the inverter and the first load device as well as the inverter and the second load device.

Wireless power supply system for elevators and elevator system

A wireless power transfer system includes an induction heating cooking apparatus including a heating coil that produces a high-frequency magnetic field, a power reception device including a power reception coil that receives power from the heating coil, a first communication device provided on the power reception device to transmit a communication signal, a second communication device provided above the induction heating cooking apparatus to receive the communication signal from the first communication device, and a notification unit that indicates whether the power reception coil is located within a predetermined region that is set in advance with respect to the heating coil, when the second communication device receives the communication signal from the first communication device.

Wireless power transfer system

A control circuit performs ON/OFF control for a switching element so that LED current flowing in an LED unit is within a rated current range. In the case where the LED unit is lit, a voltage applied between both ends of series connection of a reactor and the LED unit becomes a first bus voltage, when the switching element is ON, and becomes a voltage lower than the first bus voltage, that is determined based on the first bus voltage and a second bus voltage, when a switching element is OFF.

LED lighting device

There is obtained an ignition apparatus, for an internal combustion engine, that can make a predetermined output current flow in a stable manner so that the combustion state of the internal combustion engine can always be maintained in a good condition, even in the case where the voltage of the power source connected with the energy storing coil fluctuates. There are provided an energy storing coil (), a switching means (S) for accumulating energy, an ignition coil (), and a switching means (S) that turns on/off an ignition current; the switching means (S) and (S) are alternately turned on/off so that a current with a alternating polarity is made to flow continuously in the ignition coil (); a switching means (S) is connected both terminals of the energy storing coil (); and when a current flowing in the energy storing coil () reaches a target value, the switching means (S) is turned off and the switching means (S) is turned off so that the energy storing coil current circulates through the switching means (S) so as to keep the current to be approximately the target value.

Ignition apparatus for internal combustion engine

Growing community of inventors

Tokyo, Japan

Hirohisa Kuwano