Toshiba Carrier Corporation

Kabushiki Kaisha Toshiba

Junichi Takuma

Hiroshi Miyazaki

Hidetoshi Kanazawa

Takayuki Kambe

Eiji Sato

Takashi Kobayashi

Toshiyuki Kamimura

Tomoaki Toshi

Hiroyuki Isegawa

When an outdoor machine includes a signal line connector for receiving ON/OFF signals for a compressor, an outdoor machine drive control unit of an air conditioner includes an inverter device for supplying power variable in frequency to the compressor and a control device for controlling the inverter device to gradually increase the number of revolutions of the compressor when the ON/OFF signal for the compressor received through the signal line connector changes from the OFF condition to the ON condition. The air conditioner outdoor machine drive control unit enables to construct an inverter-type air conditioner by using a general heat-pump-type indoor machine and merely mounting it in an outdoor machine.

Air conditioner outdoor unit drive control unit

This invention relates to a brushless motor driving system for driving an outdoor fan of an air conditioner. The driving system comprises a Hall probe for detecting a position of a rotor of a brushless motor, an inverter circuit consisting of a plurality of switching elements connected in bridge-connection, the inverter circuit supplying ON-OFF electric current to stator coils of the brushless motor, and a control means for switching the switching elements of the inverter circuit based on the output signal of the Hall probe. Before starting the motor, the control means controlls the switching elements to supply DC PWM-controlled current to the stator coils of the motor in synchronization with the output signal of the Hall probe, so that the rotor is braked, stopped and set to home position.

Brushless motor driving system for driving outdoor fan of air conditioner

A filter apparatus has a current-detecting coil. The coil detects a high-frequency leak current flowing from the phase-windings of a motor to the earth terminal through the closed case of a compressor. A current-canceling circuit generates a current similar in waveform to the high-frequency leak current detected by the coil. The current thus generated cancels out the high-frequency leak current.

Filter apparatus for use in an inverter apparatus

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Fuji, Japan

Junichi Takuma