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Title:
ANEMOMETER FOR COLD DISTRICT
Document Type and Number:
Japanese Patent JPH03134587
Kind Code:
A
Abstract:

PURPOSE: To prevent measuring inferiority due to the icing of a windmill by providing an electromotor whose drive shaft is connected to the rotary shaft of the windmill and mounting an electric circuit applying a drive current rotating the rotary shaft of the windmill at slow speed at a windless time.

CONSTITUTION: An electromotor 11 is constituted so as to largely take an air gap between an armature 11B and a field system 11C in order to gently set the coupling of the armature 11B and field system 11C to a degree exerting almost no effect on the rotation corresponding to the wind force of a windmill 1. In this constitution, when atmospheric temp. lowers to predetermined temp. (e.g., -3°C) or less, a temp. switch Sw1 is operated and the armature 11B is rotationally driven by the drive current Ip of a power source 5. Therefore, the armature 11B rotates the windmill 1 at slow speed even at a windless time and the freezing of the windmill 1 due to icing is not generated.


Inventors:
SAITO TAKASHI
YAMAUCHI YOSHIZO
Application Number:
JP1989000272663
Publication Date:
June 07, 1991
Filing Date:
October 18, 1989
Export Citation:
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Assignee:
NAKAASA SOKKI KK
International Classes:
G01W1/00; G01P5/06; (IPC1-7): G01W1/00