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Title:
DYNAMIC BRAKE DEVICE OF SERVO MOTOR
Document Type and Number:
WIPO Patent Application WO/1997/005691
Kind Code:
A1
Abstract:
A dynamic brake device having a simple circuit construction for a servo motor. A PWM control circuit (1) of this dynamic brake device generates a brake signal which simultaneously closes all switching devices of either a first group (TRa, TRc, TRe) connected in parallel in opposite directions with first diodes or a second group (TRb, TRd, TRf) connected in parallel in opposite directions with second diodes. In this way, each phase of the servo motor is short-circuited to thereby form a closed circuit, power generated by the servo motor at the time of brake is consumed by an internal resistance for dynamic braking.

Inventors:
INABA KIICHI (JP)
YAMADA YUUICHI (JP)
Application Number:
PCT/JP1996/002073
Publication Date:
February 13, 1997
Filing Date:
July 24, 1996
Export Citation:
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Assignee:
FANUC LTD (JP)
INABA KIICHI (JP)
YAMADA YUUICHI (JP)
International Classes:
H02P3/22; H02P6/24; (IPC1-7): H02P3/22
Foreign References:
JPS6130977A1986-02-13
JPH04255488A1992-09-10
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