Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DC MOTOR DRIVER FOR WORKING MACHINE
Document Type and Number:
Japanese Patent JP3509821
Kind Code:
B2
Abstract:

PURPOSE: To obtain a DC motor driver for working machine in which the armature is protected against damage by preventing application of an undue driving voltage to the motor.
CONSTITUTION: An AC generator 4A in an engine generator unit applies a driving voltage VM to a DC motor 5 through a rectifier 11. The carburetor 4C of an internal-combustion engine 4B in the engine generator unit is fixed with an actuator 15 for regulating the flow rate of fuel. A detection signal Vm from a detector 20 for detecting the driving voltage VM of a motor is delivered, along with a signal Vms from a setter 21 for setting the driving voltage VM, to a PTD operating unit 22 which produces an operating amount signal Vd for providing a driving current Is of the actuator 15 required for bringing the difference of Vms to zero. Rotational speed of the internal-combustion engine is controlled to sustain a set driving voltage VM by turning the driving current Is ON/OFF based on the operating amount signal Vd.


Inventors:
Hitomi, Satoshi
Suzuki, Hidetoshi
Nanjo, Hirotoshi
Application Number:
JP1994000303843
Publication Date:
March 22, 2004
Filing Date:
December 07, 1994
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KOKUSAN DENKI CO LTD
International Classes:
F02D29/06; H02M7/06; H02P7/06; H02P9/04; (IPC1-7): H02P7/06; F02D29/06; H02M7/06; H02P9/04
Attorney, Agent or Firm:
松本 英俊 (外1名)



 
Previous Patent: STRIP LINE FILTER

Next Patent: MULTIPHASE FLOW METER