CONSTANT SPEED CONTROLLER OF DC MOTOR - MATSUSHITA ELECTRIC IND CO LTD

Title:

CONSTANT SPEED CONTROLLER OF DC MOTOR

Document Type and Number:

Japanese Patent JPS6162380

Kind Code:

A

Abstract:

PURPOSE:To perform a constant speed control without adding a unit for detecting a speed by controlling constant speed by detecting a pulse generated from a commutator of a DC motor. CONSTITUTION:When a DC motor 4 rotates, a current flowed to the motor 4 is varied at the seam of the commutator to generate a short pulse. A pulse detector 6 detects the pulse and applies it to a frequency/voltage converter 7. A speed controller 5 controls the motor 4 in response to a deviation between a set speed and the speed signal from the converter 7. Thus, the size can be reduced.

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Inventors:

HASEGAWA TAKAYOSHI
MISAWA MASAHIKO
SHIMIZU TOMIO
MORISHITA TADAYUKI

Application Number:

JP18170884A

Publication Date:

March 31, 1986

Filing Date:

August 31, 1984

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

H02P7/06; (IPC1-7): H02P5/06

Domestic Patent References:

JP57189294B

Attorney, Agent or Firm:

Akira Kobiji (2 outside)

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