Mitsubishi Electric Corporation

Mitsubishi Electric Cornoration

Hayato Tanabe

Takuya Nakamura

Mao Kawamura

The electric-power conversion apparatus includes an electric-power conversion circuit having two or more legs in each of which there are provided a positive-polarity switching device, a negative-polarity switching device, and an external connection point at which the positive-polarity switching device and the negative-polarity switching device are connected in series with each other and that is connected with an electric rotating machine, a capacitor connected with a positive electrode and a negative electrode, a voltage sensor for detecting a voltage between the positive electrode and the negative electrode, a temperature sensor for detecting a temperature of the electric-power conversion circuit, and a control unit that on/off-controls the switching devices in the electric-power conversion circuit and that performs protective control in the case where a voltage detected by the voltage sensor is larger than a determination voltage calculated based on a temperature detected by the temperature sensor.

Electric-rotating-machine control apparatus

The isolation transformer includes two kinds of winding, a high voltage side winding and a low voltage side winding, and the high voltage side winding and the low voltage side winding are formed in winding layers, wherein the high voltage side winding includes windings formed in multiple winding layers, a winding layer having a different number of turns exists in one or more kinds of the two kinds of winding among the windings formed in the multiple winding layers, winding layers wherein current flows in the same direction are stacked in such a way as not to be neighboring, and at least one of winding layers having the greatest number of turns is disposed as a layer other than an outermost layer.

Isolation transformer, and power conversion device in which the isolation transformer is used

The power conversion device includes: a boost, converter which includes a magnetically-coupled reactor and a plurality of semiconductor switching elements connected to the magnetically-coupled reactor; an inverter; a cooler for cooling the magnetically-coupled reactor; a bus bar which is a conductive wiring member; and a current sensor for detecting a magnetic flux generated around the bus bar. The magnetically-coupled reactor includes a first winding, a second winding, and a core for magnetically coupling the first winding and the second winding. The core has a composite magnetic body containing soft magnetic powder and a binder, and at least parts of the first winding and the second winding are embedded in the composite magnetic body. The cooler is provided in contact with the magnetically-coupled reactor. The current sensor is provided on a side opposite to the magnetically-coupled reactor with the cooler therebetween.

Growing community of inventors

Tokyo, Japan

Hayato Tanabe