Mitsubishi Electric Corporation

Norikazu Hattori

Shohei Suzuki

Takahiro Harada

Yasuo Fujii

Norihiro Suzuki

Tetsuo Tanaka

Tatsuki Matsunaga

Takahiro Kurahori

Naoto Norina

The inverter includes: a main body case accommodating main circuit terminal block and a control terminal block, high-voltage wire and low-voltage wire being respectively connected to the main circuit terminal block and the control terminal block; a wire cover detachably attached to the main body case to cover the main circuit terminal block; and a front cover detachably attached to the wire cover to cover the control terminal block, the front cover being fixed to the main body case with a fastening member requiring a tool for removal. The front cover includes a stopper, and, in a state where the front cover is attached to the wire cover, the stopper is located on a path through which the wire cover moves when removing the wire cover from the main body case.

Power conversion apparatus

A power conversion apparatus includes a main circuit unit, a control unit, a current sensor, and a half-wave rectifier unit. The control unit includes current frequency calculation units and monitoring units. The current frequency calculation units calculate current frequencies based on at least either the rising timing or falling timing of current detection signals half-wave rectified by the half-wave rectifier unit. The monitoring units monitor the speed of a motor based on the current frequencies calculated by the current frequency calculation units.

Power conversion apparatus, drive control system, machine learning apparatus, and motor monitoring method

Growing community of inventors

Tokyo, Japan

Norikazu Hattori