Title:
PROTECTION DEVICE
Document Type and Number:
Japanese Patent JP2020174500
Kind Code:
A
Abstract:
To provide a protection device capable of appropriately selecting a resistance value of a resistor used in a dynamic braking circuit while protecting a synchronous motor and a motor drive device.SOLUTION: A protection device 10b provided between a synchronous motor 12 having a plurality of windings and a motor drive device 10a for driving the synchronous motor 12 includes a switchgear 28 that switches between connecting and disconnecting the motor drive device 10a and the synchronous motor 12, resistors Ru, Rv, and Rw, a dynamic brake circuit 26 having a switch that short-circuits a plurality of windings via the resistors Ru, Rv, and Rw between the switchgear 28 and the synchronous motor 12, and a control device 30 that controls the switchgear 28 and the dynamic brake circuit 26. The control device 30 controls the switch of the dynamic brake circuit 26 to short-circuit the plurality of windings, and then controls the switchgear 28 to switch the connection between the motor drive device 10a and the synchronous motor 12 to disconnection.SELECTED DRAWING: Figure 1
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Inventors:
KONAKA YUDAI
KAWAI KENJI
KAWAI KENJI
Application Number:
JP2019076573A
Publication Date:
October 22, 2020
Filing Date:
April 12, 2019
Export Citation:
Assignee:
FANUC LTD
International Classes:
H02P29/024; H02P3/22
Domestic Patent References:
| JP2013179741A | 2013-09-09 | |||
| JPH0946813A | 1997-02-14 | |||
| JP2007282313A | 2007-10-25 | |||
| JPH11122941A | 1999-04-30 | |||
| JP6285477B2 | 2018-02-28 | |||
| JP2009142115A | 2009-06-25 |
Attorney, Agent or Firm:
Takehiro Chiba
Toshiyuki Miyadera
Takayuki Chima
Yasuharu Nakasone
Shiro Sakai
Toru Sekiguchi
Toshiyuki Miyadera
Takayuki Chima
Yasuharu Nakasone
Shiro Sakai
Toru Sekiguchi