Mitsubishi Electric Corporation

Jfe Steel Corporation

Yohei Takigawa

Tetsuya Yamamoto

Keiichiro Shizu

Tomohiro Kutsuki

Koichi Nushiro

Yuji Iwami

Soichiro Watanabe

Takahide Higuchi

Toshiyuki Hirosawa

Ryuji Tsutsumi

Shigeaki Goto

Eiji Handa

An air conditioner includes an outdoor unit including a three-phase AC power supply, a compressor that compresses a refrigerant, and an inverter circuit that controls the compressor. The outdoor unit includes a driving microcomputer that drives the inverter circuit, a second diode bridge connected to the inverter circuit, a first relay disposed on a first wiring line, a second relay disposed on a third wiring line, an inrush-prevention resistor, and a third relay connected to the first wiring line and the inrush-prevention resistor. After the compressor stops, the driving microcomputer brings the first relay, the second relay, and the third relay into an off state.

Air conditioner

A power conversion apparatus includes: a reactor; a rectifier circuit that includes a first leg including switching elements connected in series and a second leg connected in parallel with the first leg, including switching elements connected in series; and a smoothing capacitor that smooths an output voltage of the rectifier circuit. The power conversion apparatus also includes an inverter that converts a direct-current voltage smoothed by the smoothing capacitor into a drive voltage for a motor and applies the drive voltage to the motor; a voltage detection unit that detects the direct-current voltage; and a control unit that controls operation of the rectifier circuit and the inverter. The control unit controls operations of the switching elements on the basis of an induced voltage induced in the motor and a detected value of the direct-current voltage.

Power conversion apparatus, refrigeration cycle apparatus, and air conditioner

A method of producing a sintered ore includes charging a sintering raw material containing a powder ore and a carbonaceous material onto a circulatory moving pallet to form a charged layer, igniting the carbonaceous material on a surface of the charged layer, introducing air above the charged layer containing a gaseous fuel diluted to not more than a lower limit of combustion concentration with wind boxes arranged below the pallet into the charged layer by suction, and combusting the gaseous fuel and the carbonaceous material in the charged layer, wherein more than 50% of a total supply of the gaseous fuel is supplied in a front &#xbd; portion of a region supplying the gaseous fuel.

Method of producing sintered ore

Growing community of inventors

Tokyo, Japan

Yohei Takigawa