Title:
A magnetic pole polarity determining device, a permanent magnet synchronous motor control device, and the magnetic pole polarity judging method
Document Type and Number:
Japanese Patent JP5976421
Kind Code:
B2
Abstract:
A control system pertaining to an embodiment controls a synchronous electric motor having a magnet inside a rotor, wherein the system is provided with: an inverter for outputting alternating current to drive the synchronous electric motor; a gate-instruction generator for generating a gate instruction to drive the inverter; a current-detection unit for detecting the current value of alternating current outputted from the inverter; a magnetic pole position estimator for estimating the magnetic pole position on the basis of the current value detected by the current-detection unit; a control unit for instructing the gate-instruction generator so as to generate a gate instruction for polarity assessment so that the (d) axial component of the current value detected by the current-detection unit shows a predetermined value when magnetic-polarity assessment is performed; and a magnetic-pole polarity assessment unit for determining, when the polarity-assessment gate instruction is generated, a first type of information showing inductance due to the positive (d)-axis current and a second type of information showing inductance due to the negative (d)-axis current on the basis of the magnetic-pole position estimated by the magnetic-pole position estimator, comparing the determined first type of information and second type of information, and assessing the direction showing the larger value as the N-pole. The control system assesses the side where the value showing inductance of the magnetic-pole direction is increasing as the N-pole side when current is directed at the same predetermined value in the positive direction and the negative direction.
Inventors:
Taniguchi Shun
Kazuya Yasui
Kazuaki Yuki
Yosuke Nakazawa
Kazuya Yasui
Kazuaki Yuki
Yosuke Nakazawa
Application Number:
JP2012144651A
Publication Date:
August 23, 2016
Filing Date:
June 27, 2012
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H02P6/18; H02P6/185; H02P6/06; H02P6/08; H02P6/182; H02P6/28; H02P21/32
Domestic Patent References:
| JP3401155B2 | ||||
| JP2008079489A | ||||
| JP2000060038A |
Foreign References:
| US20110234135 | ||||
| WO2011077829A1 |
Attorney, Agent or Firm:
Sakai International Patent Office