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Patent Searching and Data


Title:
MOTOR DRIVE DEVICE
Document Type and Number:
Japanese Patent JP2020061851
Kind Code:
A
Abstract:
To provide a motor drive device that avoids abnormal heat generation in a dynamic brake circuit.SOLUTION: A motor drive device 1 comprises: a converter 11; an inverter 12; a DC link capacitor 13; a dynamic brake circuit 20 that includes a resistor 21 and a switch 22 which are provided between terminals of a motor 3, and performs a braking of the motor 3 by opening between the terminals of the motor 3 with the switch 22 in an open state when driving the motor 3 in operation of equipment, and short-circuiting between the terminals of the motor 3 via the resistor 21 with the switch 22 is a closed state when the equipment is stopped during the driving of the motor 3; and an isolation circuit 30 that includes switches 31 and 32 provided between the dynamic break circuit 20 and the motor 3, and isolates the dynamic break circuit 20 with the switches 31 and 32 in an open state from the terminals of the motor 3 when a generated power of the motor 3 is equal to a prescribed value or more during a stop of the equipment.SELECTED DRAWING: Figure 1

Inventors:
INAGAKI KEITARO
TATSUTA MASAYA
MATSUMOTO YASUYUKI
Application Number:
JP2018190987A
Publication Date:
April 16, 2020
Filing Date:
October 09, 2018
Export Citation:
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Assignee:
FANUC LTD
International Classes:
H02P3/22
Attorney, Agent or Firm:
Masayuki Masabayashi
Tetsuo Shiba
Hiroaki Hoshino