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Patent Searching and Data


Title:
MOTOR CONTROLLER
Document Type and Number:
Japanese Patent JP2012257364
Kind Code:
A
Abstract:

To fully charge a snubber capacitor without providing a special configuration of direct supply connection from a smoothing capacitor to the snubber capacitor.

A motor controller 100 includes: a smoothing capacitor 2; an inverter part 3 in which three sets of two serially connected arm switching elements 11 are connected in parallel to be a three phase; a dynamic brake circuit part 5 having a brake circuit rectifier 21 that is connected to the output side of the inverter part 3, and a damping resistor 23 and a damping switching element 22 that are connected in parallel with the brake circuit rectifier 21; a snubber circuit part 6 containing a snubber capacitor 31 connected in parallel with the damping switching element 22; and a drive control part 7 for outputting a gate signal for each arm switching element 11 and a brake damping signal for the damping switching element 22. The drive control part 7 performs processing to release dynamic brake before a normal operation and processing to control charging of the snubber capacitor 31.


More Like This:
WO/2018/030362MOTOR DRIVING CIRCUIT
Inventors:
SAWAMURA MITSUJIRO
ONO AKIHISA
Application Number:
JP2011000128220
Publication Date:
December 27, 2012
Filing Date:
June 08, 2011
Export Citation:
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Assignee:
YASKAWA ELECTRIC CORP
International Classes:
H02P3/22; H02P27/06
Domestic Patent References:
JP2000270577A2000-09-29
JPH08242576A1996-09-17
Attorney, Agent or Firm:
益田 博文