Mitsubishi Electric Corporation

Kota Teramoto

Tetsuya Kojima

Sho Kato

Yoshinori Chiba

Yoshinori Yamashita

Yuruki Okada

Shinsuke Kadoi

Takumi Uemura

A control device includes: a current detector that detects a stator current flowing between a voltage applicator and a stator winding of a rotary machine; a controller that computes a voltage command value based on the stator current and a rotor position, the voltage command value being a command value of a stator voltage applied to the stator winding; a PWM modulator that generates a gate signal such that a value obtained by smoothing the stator voltage matches the voltage command value, and to use this gate signal to control turning on and off of switching elements provided in the voltage applicator; a voltage integrator that computes a voltage integration value by integrating the gate signal; and a position estimator that estimates the rotor position based on the voltage integration value and the stator current.

Rotary machine control device

A control device includes a current detector that detects a stator current flowing between a voltage application unit and a stator winding of a rotating machine; a control unit that computes a voltage command value that is a command value for a stator voltage to be applied to the stator winding on the basis of the stator current and a rotor position serving as position information of a rotor of the rotating machine; a PWM modulator that performs on-off control of switching elements of the voltage application unit so that a smoothed value of the stator voltage matches the voltage command value; and a position estimator that estimates, on the basis of the voltage command value and the stator current, the rotor position through a filter that removes a frequency component of a fundamental frequency of rotational speed of the rotating machine.

Control device for rotating machine

An electric rolling stock control apparatus includes: a plurality of propulsion control devices that each control an electric motor for driving a car of a train, the electric motor being installed on the car, the train including a plurality of the cars; and a train information management device that calculates power necessary for the entire train, wherein the propulsion control devices each determine power according to a predetermined condition.

Electric rolling stock control apparatus

A car control device includes a driving force calculating unit that calculates driving force necessary for a train to travel; an operating number calculating unit that determines the number of M cars to be operated on the basis of the driving force; and a driving force command calculating unit that calculates driving force commands to be given to the M cars that operate depending on the number of M cars to be operated, wherein the driving force command calculating unit continuously changes the driving force commands when the number of M cars to be operated changes.

Car control device and car control system

An electric rolling stock control device includes a voltage controlling unit for controlling an output voltage of an inverter and a speed estimating unit for calculating a rotation speed estimation value of an electric motor. The speed estimating unit includes an initial speed estimating unit for outputting an initial speed estimation value, a steady speed estimating unit for outputting a steady speed estimation value, a correction coefficient calculating unit for calculating a correction coefficient based on the steady speed estimation value and a backup speed, and a correction speed calculating unit for storing the correction coefficient in a storage unit and calculating a correction speed by multiplying the correction coefficient by the backup speed.

Electric rolling stock control device

A power converter has: switching elements connected in parallel to each of primary-side filter capacitors, freewheel diodes connected in parallel to the switching elements, and snubber resistances connected in parallel to the switching elements. The controller causes stoppage of the power converter by turning off each of the switching elements. After stoppage of the power converter, the controller causes a discharge circuit to operate by turning on a thyristor, thereby discharging the primary-side filter capacitors. By discharging of the primary-side filter capacitors, a secondary-side filter capacitor is discharged via the freewheel diodes.

Growing community of inventors

Tokyo, Japan

Kota Teramoto