Title:
CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2014/002804
Kind Code:
A1
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.
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Inventors:
TANIGUCHI SHUN (JP)
YASUI KAZUYA (JP)
YUUKI KAZUAKI (JP)
NAKAZAWA YOSUKE (JP)
YASUI KAZUYA (JP)
YUUKI KAZUAKI (JP)
NAKAZAWA YOSUKE (JP)
Application Number:
PCT/JP2013/066515
Publication Date:
January 03, 2014
Filing Date:
June 14, 2013
Export Citation:
Assignee:
TOSHIBA KK (JP)
International Classes:
H02P6/06; H02P6/18; H02P6/08; H02P6/182; H02P6/185; H02P6/28; H02P21/32
Foreign References:
| JP3401155B2 | 2003-04-28 | |||
| JP2008079489A | 2008-04-03 | |||
| JP2000060038A | 2000-02-25 | |||
| JP2005333761A | 2005-12-02 |
Other References:
See also references of EP 2869457A4
None
None
Attorney, Agent or Firm:
SAKAI, Hiroaki et al. (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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