Mitsubishi Electric Corporation

Nippon Steel Sumitomo Metal Corporation

Tomohiro Seki

Ryo Nakamura

Yuya Hisano

Masahiro Iezawa

Makoto Shimizu

Masaaki Mizuno

Masuhisa Tanimoto

Jun Kurihara

Hiroshi Obayashi

Ryo Matsui

Yasuhiro Sato

Hirotaka Mori

Yohei Michitsuji

To provide a controller of rotary electric machine which can control voltage of each set of the winding appropriately within a range less than or equal to the DC power voltage, to the rotary electric machine which has plural sets of windings. A controller of rotary electric machine calculates, for each set, a required DC voltage which is a minimum DC power voltage required for applying a voltage according to the voltage command value to the winding, based on the voltage command value; calculates one common required DC voltage which is common to all sets, based on all sets of the required DC voltages; changes the common voltage control value so that the common required DC voltage-approaches the DC power voltage; and changes each set of the current command value based on the common voltage control value.

Controller of rotary electric machine

Provided is a control device for an electric generator/motor, which includes an armature winding and a field winding, the control device including: a bridge circuit configured to energize the armature winding; a field circuit configured to energize the field winding; and an energization control unit configured to control the energization of the bridge circuit and the field circuit. The energization control unit is configured to perform, when performing switching between a generation mode and a drive mode in response to an external command to control the electric generator/motor, control on a current supply amount for the field winding, and vector control on a current supply amount for the armature winding so as to compensate for a variation in field current.

Control device for electric generator/motor and control method for electric generator/motor

A control device for rotating electric machine, which controls a rotating electric machine as a charging electric generator, using an inverter circuit, the control device including: an energization amount generating unit for generating a first electric generation mode in which an energization amount for a field winding and an energization amount for an armature winding of the rotating electric machine are controlled and the inverter circuit is driven to perform electric generation, and a second electric generation mode in which an energization amount for the field winding is controlled to perform electric generation; and an energization signal generating unit for, on the basis of variation-related information relevant to variation in one of electric generation torque and electric generation current of the rotating electric machine, performing switching between the first electric generation mode and the second electric generation mode, and generating energization signals for the field winding and the armature winding.

Control device for rotating electric machine

A method of precisely measuring the track twist of a track on which a vehicle for commercial operation is travelling using this vehicle is to be provided. The method includes measuring a condition of a track (R) on which a vehicle for commercial operation () is travelling using this vehicle (). The vehicle for commercial operation includes a bogie (). The bogie includes four wheels () and primary springs () provided to correspond to the four wheels () and support the corresponding wheels (), and is capable of measuring a wheel load of each of the four wheels (). The method includes the steps of: measuring the wheel load of each wheel () (S); calculating the displacement of each primary spring () based on the measured wheel load (S); and calculating the track twist (h) of the track (R) based on the calculated displacements of the primary springs () (S).

Method of measuring condition of track using vehicle for commercial operation and vehicle for commercial operation for measuring condition of track

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Tokyo, Japan

Tomohiro Seki