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Patent Searching and Data


Title:
MOTOR DRIVING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/013491
Kind Code:
A1
Abstract:
The present invention relates to a motor driving apparatus and, more specifically, to a motor driving apparatus which allows a maximum torque operation by correcting an angle error occurring during quick acceleration of a motor in a sensorless system. The motor driving apparatus comprises: an inverter for driving a motor, using an alternating current voltage; and a control unit for outputting a PWM signal for controlling an operation of a switching element included in the inverter. Here, the control unit determines an inductance parameter used to calculate a speed command value for determining a duty ratio of a PWM signal, and determines whether the motor is being accelerated, on the basis of a current change measured from the inverter. Then, when the motor is being accelerated, the control unit enables a maximum torque operation by reducing an angle error of a rotor through a correction of reducing a previously-determined inductance parameter.

Inventors:
JUNG HANSU (KR)
KIM KWANG SIK (KR)
LEE CHUNGILL (KR)
Application Number:
PCT/KR2018/007635
Publication Date:
January 17, 2019
Filing Date:
July 05, 2018
Export Citation:
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Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H02P6/18
Foreign References:
KR101575038B12015-12-08
KR20100083919A2010-07-23
KR20060011714A2006-02-03
KR20080079142A2008-08-29
JP2011045152A2011-03-03
Other References:
See also references of EP 3654520A4
Attorney, Agent or Firm:
DAE-A INTELLECTUAL PROPERTY CONSULTING (KR)
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