Title:
MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/113732
Kind Code:
A1
Abstract:
This motor control device controls an AC motor by sensorless control that does not use a rotor position detector. This motor control device includes: an inverter that converts a direct current to an alternating current on the basis of a pulse width modulation signal; a multilayer printed circuit board that has, in an inner layer thereof, a wiring pattern interposed on a current line connecting the inverter and a winding of an AC motor; a plurality of chip inductors that are mounted on the main surface of the multilayer printed circuit board toward the winding direction in a prescribed direction intersecting the wiring pattern so as to face the wiring pattern and that are connected in series to form a series circuit having a center point connected to a reference potential; load resistors that are connected between the center point of the series circuit and both ends of the series circuit; a differential amplification circuit in which a pair of input ends are connected at both ends of the series circuit; and a control unit that uses the output of the differential amplification circuit to estimate the position of a rotor of the AC motor and that generates the pulse width modulation signal to be supplied to the inverter in accordance with the estimated position of the rotor.
Inventors:
HOUDA AKIHIKO (JP)
Application Number:
PCT/JP2021/041247
Publication Date:
June 02, 2022
Filing Date:
November 09, 2021
Export Citation:
Assignee:
ORIENTAL MOTOR CO LTD (JP)
International Classes:
H02P21/24; H02P21/22; H02P25/16
Domestic Patent References:
| WO2019176316A1 | 2019-09-19 | |||
| WO2019239628A1 | 2019-12-19 |
Foreign References:
| JP2011004515A | 2011-01-06 | |||
| JP2012175747A | 2012-09-10 |
Other References:
J. B. BARTOLOC. S. STAINESC. CARUANA: "An Investigation on the Performance of Current Derivative Sensors for the Sensorless Control of A.C. drives", IET CONFERENCE ON POWER ELECTRONICS, MACHINES AND DRIVES, YORK, 2008, pages 532 - 536
S. BOLOGNANIS. CALLIGAROR. PETRELLAM. STERPELLONE: "Sensorless control for IPMSM using PWM excitation: Analytical developments and implementation issues", SYMPOSIUM ON SENSORLESS CONTROL FOR ELECTRICAL DRIVES, 2011, pages 64 - 73, XP032063457, DOI: 10.1109/SLED.2011.6051546
S. BOLOGNANIS. CALLIGAROR. PETRELLAM. STERPELLONE: "Sensorless control for IPMSM using PWM excitation: Analytical developments and implementation issues", SYMPOSIUM ON SENSORLESS CONTROL FOR ELECTRICAL DRIVES, 2011, pages 64 - 73, XP032063457, DOI: 10.1109/SLED.2011.6051546
Attorney, Agent or Firm:
AI ASSOCIATION OF PATENT AND TRADEMARK ATTORNEYS (JP)
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