Apparatus for controlling a motor using piezoelectric resistance

Details Apparatus for controlling a motor using piezoelectric resistance Apparatus for controlling a motor using piezoelectric resistance

1995-11-21

1996-09-24

Wysocki, Jonathan

Electricity: motive power systems

Plural diverse motor controls

Running-speed control

73862192, 73862338, G01L 302

Patent

active

055594085

ABSTRACT:
A method of controlling operation of a DC motor including the steps of detecting the level of acceleration caused by the rotation of the output shaft of the DC motor; determining the square root of the detected level of acceleration; and supplying the DC motor with a driving voltage which is determined in accordance with the difference between the square root of the acceleration and a voltage command. This method is carried out by an apparatus which includes a power supply for supplying an electric power to the DC motor; a rotary member rotatable in accordance with the rotation of the output shaft of the DC motor; an acceleration sensor provided on the rotary member for detecting the acceleration of acting on the rotary member; a square root circuit for computing the square root of the output from the acceleration sensor; and a differential amplifier circuit for supplying the DC motor with a voltage which is determined in accordance with the difference between the voltage of the power supply and the output voltage of the square root circuit.

REFERENCES:
patent: 3201982 (1965-08-01), Kennedy
patent: 4023864 (1977-05-01), Lang et al.
patent: 4152930 (1979-05-01), Fujimoto et al.
patent: 4312241 (1982-01-01), Budraitis
patent: 4724711 (1988-02-01), Sakakibara et al.
patent: 4838077 (1989-06-01), Shifflet et al.
patent: 5215154 (1993-06-01), Kirby

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