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Patent Searching and Data


Title:
ELECTRICAL GOVERNOR MOTOR CONTROLLER
Document Type and Number:
Japanese Patent JP01198295
Kind Code:
A
Abstract:

PURPOSE: To enable application of electrical brake onto an electrical governor motor, by turning a pair of transistors ON and shortcircuiting an armature coil.

CONSTITUTION: When control outputs MA, MB and MC go respectively to L, H and L, transistors 4, 5 are turned ON to rotate a motor 22 forward. When the control outputs MA, MB, MC go respectively to H, L, L, transistors 6, 12 turn ON to rotate the motor 22 reversely. When all control outputs go to L, the transistors 4, 6 turn ON while the transistors 12, 15 turn OFF. Consequently, the armature coil 22 is shortcircuited through the transistors 4, 6 thus applying brake onto a governor motor.


Inventors:
Takashima, Tadao
Application Number:
JP1988000021927
Publication Date:
August 09, 1989
Filing Date:
February 03, 1988
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H02P3/12; H02P7/288; H02P3/06; H02P7/18; (IPC1-7): H02P3/12; H02P7/288