Mitsubishi Denki Kabushiki Kaisha

Keiu Kawasaki

Takayoshi Matsuo

Yasuya Kajiwara

Tetsuya Tanaka

Toshio Tatsutani

Masaaki Sendo

Toshihiko Horii

Keiichi Hasegawa

Yoshiyuki Umai

Kazuhiko Hotta

A hand dryer in which a channel-like hand insertion unit 5 opening at the front face and side faces is formed in the front face of a case 6 which functions as an outer shell. Upper and lower blowout nozzles 32 and 33 are disposed in the upper and lower faces of the hand insertion unit 5. A high-pressure air flow generation device 7 supplies high-pressure air flow to the blowout nozzles 32 and 33. A high-speed wind generated in the hand insertion unit 5 blows water on hands to the inner portion of the hand insertion unit 5. The blown water is drained to the outside of the hand insertion unit 5, through drainage holes 18 which are disposed at lateral ends of the bottom face of the hand insertion unit 5. Thereby, the blown water from the hands can be smoothly drained without remaining in the hand insertion unit.

Hand dryer

There is provided an apparatus for controlling a throttle actuator which detects the magnetic pole position of a rotor of a brushless motor connected to a throttle valve and drives the brushless motor in response to the detected magnetic pole position detecting signal. The apparatus is arranged to detect any fault in the magnetic pole position detecting signal and steppingly drive the brushless motor independently of the magnetic pole position detecting signal when a fault is detected.

Apparatus for controlling throttle actuator

The invention relates to a control unit to control a continuous cycloconverter of the non-circulating current type which performs frequency conversion of an AC power source using a semiconductor element a to perform commutation by the AC power source and variable speed operation of an AC motor. Sine/cosine waves as secondary magnetic flux directional signals are obtained by a sine/cosine wave generator based on the slip phase and the rotor phase of the motor; deviation between torque current set value supplied from a speed controller and torque current feedback value is outputted as torque voltage adjusted value by a torque current control element, and deviation between exciting current set value supplied from a magnetic flux controller and exciting current feedback value is outputted as exciting voltage adjusted value by an exciting current control element; the torque and exciting voltage adjusted values are converted into alternating voltage set values using the sine/cosine waves as parameters, and the torque current set value and the exciting current set value are converted into alternating current set values also using the sine/cosine waves as parameters; the alternating voltage set value and the alternating current set value converted are outputted to a control circuit to alternately operate switching of the semiconductor elements of positive and negative groups which constitute the cycloconverter, and the amplitude error and the phase error produced between the alternating current set value supplied to the cycloconverter and the alternating drive current actually supplied to the motor can be reduced significantly.

Control unit for non-circulating current type cycloconverter

An improvement in a commutation control method or a control circuit for a converter comprising a plurality of converter units connected in cascade, which is provided with a circuit which maintains a phase control angle of each converter unit in an about constant angular difference within a range of a specified converter output, thereby enabling precision output control, reduction of the ripple in a delivered current to a load, and an improvement in power factor of an input fundamental wave in comparison with the symmetric control.

Growing community of inventors

Giju, Japan

Keiu Kawasaki