Matsushita Electric Industrial Co., Ltd.

Matsushita Refrigeration Company

Yoshiteru Ito

Yoshiaki Doyama

Keizo Matsui

Masataka Ozeki

Kaneharu Yoshioka

Shusaku Watakabe

Izumi Yoshida

Hideo Ogata

A force sensation exhibiting device has a housing which can be grasped by a hand, at least one rotatably or linearly movable motor contained in the housing, an input section where repulsive force information are input, and control circuit for driving and controlling said motor according to the repulsive force information, wherein a force sensation is given to said hand by a drive of the motor.

Force sensation exhibiting device data input device and data input

An inverter control apparatus for controlling a command frequency and a command voltage which are supplied to an inverter which then supplies AC power of a desired frequency, accordingly, to an induction motor. The inverter control apparatus receives a requested rotational speed of the motor and an actual rotational speed of the motor is obtained by detecting a frequency of a fluctuation component of a drive current supplied from the inverter to the induction motor. The difference between the requested rotational speed and the actual rotational speed represents a slip amount, which is added to the requested rotational speed to produce a command frequency. The command voltage is set to a voltage acquired when the monitored drive current is at a minimum value. Thus, the inverter control apparatus is able to maintain power consumption at the lowest possible level in response to changes in the operating environment without requiring a motor constant input or a motor speed detector, while compensating the slip ratio of the induction motor to maintain the motor speed at a target level.

Inverter control apparatus

A data input device includes a housing which can be grasped by a hand. The housing is equipped with a detecting device that detects a displacement or pressure at a portion of the housing on which fingers are placed when the housing is grasped by the hand. The data input device may include plural sensors to detect displacement or pressure at several different finger belly portions of the fingers. Also, plural sensors may be provided for each finger belly portion. The data input device may be used to control the movement of remotely located mechanical fingers or virtual fingers shown on a display.

Force sensation exhibiting device, data input device and data input

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Takatsuki, Japan

Yoshiteru Ito