Kabushiki Kaisha Toshiba

Toshiba Corporation

Ikuo Yasuoka

Shinichi Toda

Yosuke Nakazawa

Takashi Takagi

Mitsuhiro Numazaki

Kazuaki Yuuki

Makoto Takeda

Saburou Souma

Takahiko Minami

Haruhiko Fujito

Hidetoshi Manabe

Yasufumi Mochizuki

A power converter for an electric locomotive includes an insulating transformer, an AC/DC converter, an inverter, a PWM controller, and a voltage controller. The insulating transformer is supplied with high-voltage AC power from an AC overhead wire to convert a high voltage to a low voltage and output low-voltage AC power. The AC/DC converter receives the low-voltage AC power and performs AC/DC conversion. The inverter receives an output from the AC/DC converter and performs DC/AC conversion for supply to a load. The PWM controller outputs a PWM control signal having a predetermined pattern, the pattern for removing specific harmonic components from an output of the inverter or attenuating the specific harmonic components to at most a predetermined level. The voltage controller controls a DC output voltage of the AC/DC converter to control an output voltage of the inverter.

Power converter for electric locomotive

According to one embodiment, an electric vehicle control apparatus is provided with a converter having a diode and a switching device which convert an AC voltage or a DC voltage supplied from an input side into a DC voltage, whose output side is connected to a main motor through an inverter, a battery connected to the converter through a reactor, to provide a power source for the main motor, and a boosting chopper circuit composed the diode and the switching device which the converter has, so as to boost a voltage of the battery.

Electric vehicle control apparatus and electric vehicle

Disclosed herein are electric vehicle control device which can distribute the heat generated by the semiconductor devices in the DC/AC converter efficiently. Also disclosed herein are methods of converting DC to AC while keeping the heat value of the semiconductor devices stable.

Electric vehicle control device

According to one embodiment, four VVVF main circuit inverters for supplying electric power to drive a permanent-magnet synchronous motor are packaged into one unit. The four VVVF main circuit inverters are configured as a 4-in-1 inverter unit which shares a cooling mechanism for radiating heat generated due to power supply operation for the permanent-magnet synchronous motors to outside. A 2-in-1 semiconductor device package in which two semiconductor elements to convert electric power are packaged into one unit to be able to drive a permanent-magnet synchronous motor is contained in the 4-in-1 inverter unit. Thereby, individual control of inverters and reducing the size of the entire apparatus can be achieved for the electric-vehicle control apparatus.

Electric-vehicle control apparatus

According to one embodiment, an electronic device includes a positive electrode, a negative electrode, a first terminal, a second terminal, a first plurality of switching elements and anti-parallel diodes coupled between the positive electrode and the first terminal and the second terminal, a second plurality of switching elements and anti-parallel diodes coupled between the negative electrode and the first terminal and the second terminal and a PiN diode coupled between the positive electrode and the negative electrode with reverse polarity.

Power conversion device

A system and method for a vehicle control system is disclosed herein. The system includes an inverter circuit, a permanent magnet synchronous motor, and a crossover connected between the inverter circuit and the permanent magnet synchronous motor. The system may also include at least one current sensor installed between the inverter circuit and the permanent magnet synchronous motor. A contactor may also be connected between the inverter circuit and the permanent magnet synchronous motor and may pass or shut off electricity between the inverter circuit and the permanent magnet synchronous motor. The system may also include a control unit connected to the contactor and the current sensor. The control unit may detect a current abnormality using information from the current sensor and open the contactor if an abnormality is detected.

Growing community of inventors

Tokyo, Japan

Ikuo Yasuoka