Toyota Jidosha Kabushiki Kaisha

Daigo Kikuta

Naoyoshi Takamatsu

Satoshi Hirose

In a motor device 300 mounted on a mobile body, a pressurizing mechanism for increasing the pressure in a motor chamber 14 in which a motor is installed has a compressor 30, which is driven to rotate by an engine 20 serving as driving means for driving the mobile body, to produce compressed air for motor chamber pressurization, and the compressed air coming from the compressor 30 is fed into the motor chamber 14 through a pipe 72 almost constantly while the engine 20 is being driven.

Motor device mounted on mobile body and mobile body having the motor device mounted thereon

There is provided a motor insulation protecting devicecomprising a motorinstalled in a motor chamberan inverterthat supplies an inverter voltage for driving the motorand pressurizing means for monitoring an internal pressure in the motor chamberand the inverter voltage of the inverterand increasing the pressure in the motor chamber when an occurrence of discharge of the motor is predicted, wherein the pressurizing means comprises a pressure detection unitthat detects the internal pressure in the motor chambera voltage detection unit that is provided in a control unitand detects the inverter voltage of the inverterand a pressurizing mechanismthat increases the pressure in the motor chamberin accordance with the output from the control unitwhen the detected internal pressure is lower than a preset discharge occurrence prediction internal pressure, and the detected inverter voltage is higher than a preset discharge occurrence prediction inverter voltage.

Motor insulation protecting device, and vehicle having the device

An inverter for driving a motor includes a plurality of power semiconductor devices. The plurality of power semiconductor devices include a resistance electrically connected between a collector and an emitter of an IGBT element. Each of the power semiconductor devices forms any one of a U-phase arm, a V-phase arm and a W-phase arm of the inverter. As a result, a discharge resistance is built in the inverter, and therefore, it is not required to prepare the discharge resistance separately. Thus, the number of components required for a motor drive apparatus can be decreased and the number of operation steps can be reduced.

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Aichi-gun, Japan

Daigo Kikuta