Title:
モータ駆動装置
Document Type and Number:
Japanese Patent JP6677067
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce a rotation speed of a motor by prolonging a period of a dynamic brake due to an upper arm as further as possible in a motor drive device for executing the dynamic brake by using an inverter including a temperature protection function, and to provide the motor drive device at low cost.SOLUTION: A regenerative power reduction part 20 calculates a total ON time consisting of a total time of turning on upper arms during a switching period for each upper arm at all the time. When executing reduction of regenerative power, the regenerative power reduction part 20 extracts a maximum total ON time that is maximum among total ON times at the same time as a switching period just before start of reduction processing of regenerative power, from among internally stored total ON times, calculates a remaining operation time by subtracting the maximum total ON time from a maximum operation time of the upper arms drivable by a boot strap capacitor, and turns on all the upper arms just during a period of the remaining operation time.SELECTED DRAWING: Figure 1
Inventors:
Lee Xiao Xue
Aya Iijima
Aya Iijima
Application Number:
JP2016090063A
Publication Date:
April 08, 2020
Filing Date:
April 28, 2016
Export Citation:
Assignee:
Fujitsu General Limited
International Classes:
H02P3/22
Domestic Patent References:
| JP2003326086A | ||||
| JP11027985A | ||||
| JP2000125584A | ||||
| JP2013208009A | ||||
| JP5292755A | ||||
| JP2006014559A |
Foreign References:
| US6211635 | ||||
| US20050285585 |