Title:
MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/071277
Kind Code:
A1
Abstract:
The motor control device according to one embodiment of the present invention comprises an inverter, a calculation unit, a speed estimation unit, and a current control unit. The inverter converts the DC voltage supplied from a DC power supply to an AC voltage and applies the AC voltage to a motor by PWM control. The calculation unit detects the bus line current of the inverter using a resistor connected between the DC power supply and the inverter and, on the basis of the bus line current, calculates motor current flowing through a motor at intervals of a predetermined control period. The speed estimation unit estimates motor speed on the basis of a detection current that is the motor current detected by being calculated by the calculation unit. The current control unit has an integrator for performing integral control at intervals of the predetermined control period, stops performing the integral control in a control period in which the detection current is not detected, and controls the motor current so that the speed estimated by the speed estimation unit becomes a command speed.
Inventors:
SAITO YUKI (JP)
OSADA YUDAI (JP)
URAYAMA MASAHARU (JP)
SUZUKI KANTARO (JP)
OSADA YUDAI (JP)
URAYAMA MASAHARU (JP)
SUZUKI KANTARO (JP)
Application Number:
PCT/JP2023/035337
Publication Date:
April 04, 2024
Filing Date:
September 28, 2023
Export Citation:
Assignee:
FUJITSU GENERAL LTD (JP)
International Classes:
H02P21/24; H02P27/08
Attorney, Agent or Firm:
MINAMI AOYAMA PATENT AND TRADEMARK ATTORNEYS (JP)
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