Title:
TEMPERATURE ESTIMATION DEVICE, MOTOR CONTROL DEVICE, AND TEMPERATURE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/100218
Kind Code:
A1
Abstract:
Provided is a temperature estimation device (13) that estimates driving duty ratio considering effects of ambient temperature with respect to energization to a coil portion on the basis of the driving duty ratio and the ambient temperature, estimates electric power consumption of a motor (2) when the coil portion is energized with the estimated driving duty ratio, electric power consumption of the motor (2) involving heat dissipation of the coil portion, electric power difference between the two electric power consumption, temperature time constant of the coil portion, and temperature change amount during time of the temperature time constant of the coil portion, and estimates temperature change amount from the ambient temperature of the coil portion on the basis of thus estimated values and a last value of the temperature change amount of the coil portion.
Inventors:
IKITAKE YOSHITAKA (JP)
ISHIHARA RYOICHI (JP)
MINAKUCHI YUKI (JP)
OKUMURA TOMOHIRO (JP)
IWASA DAISHI (JP)
ISHIHARA RYOICHI (JP)
MINAKUCHI YUKI (JP)
OKUMURA TOMOHIRO (JP)
IWASA DAISHI (JP)
Application Number:
PCT/JP2018/041996
Publication Date:
May 22, 2020
Filing Date:
November 13, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P29/64; H02P27/08
Domestic Patent References:
| WO2018083744A1 | 2018-05-11 |
Foreign References:
| JP2016111736A | 2016-06-20 | |||
| JP2018098917A | 2018-06-21 | |||
| US20150381091A1 | 2015-12-31 |
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
Download PDF:
Previous Patent: CONTROL DEVICE
Next Patent: HIGH-FREQUENCY AMPLIFIER AND HIGH-FREQUENCY AMPLIFIER MODULE
Next Patent: HIGH-FREQUENCY AMPLIFIER AND HIGH-FREQUENCY AMPLIFIER MODULE