Title:
MOTOR DRIVE DEVICE
Document Type and Number:
Japanese Patent JP2018174603
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce vibration when a motor stops.SOLUTION: A motor drive device comprises a computing unit for controlling a switching element of an inverter circuit which converts DC power into AC power and drives a compressor motor having a rotor and a coil. The computing unit includes: a rotational frequency command generation section for generating a rotational frequency command value; a real rotational frequency calculation section for detecting a real rotational frequency of the rotor; and a motor load determination section for determining a size of a load of the motor. When a stop command of the motor is detected, timing for stopping drive of the inverter circuit is varied in accordance with a determination result of the motor load determination section.SELECTED DRAWING: Figure 4
Inventors:
KOIKE SHINTARO
KATO TOMOTAKE
KATO TOMOTAKE
Application Number:
JP2017069574A
Publication Date:
November 08, 2018
Filing Date:
March 31, 2017
Export Citation:
Assignee:
HITACHI APPLIANCES INC
International Classes:
H02P3/02; F25B1/00; H02P27/06
Domestic Patent References:
| JPH02114875A | 1990-04-26 | |||
| JPS5713293A | 1982-01-23 | |||
| JP2010196975A | 2010-09-09 | |||
| JP2011200089A | 2011-10-06 |
Attorney, Agent or Firm:
Yuji Toda