| (84) |
Designated Contracting States: |
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DE FR GB |
| (30) |
Priority: |
02.12.1999 JP 34294399
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| (43) |
Date of publication of application: |
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13.06.2001 Bulletin 2001/24 |
| (73) |
Proprietor: Hitachi, Ltd. |
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Chiyoda-ku
Tokyo 100-8280 (JP) |
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| (72) |
Inventors: |
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- Masaki, Ryoso
Hitachi-shi,
Ibaraki 319-1413 (JP)
- Kaneko, Satoru
Naka-gun,
Ibaraki 319-2104 (JP)
- Obara, Sanshiro
Naka-gun,
Ibaraki 319-1106 (JP)
- Hombu, Mitsuyuki
Hitachinaka-shi,
Ibaraki 312-0011 (JP)
- Sakurai, Yoshimi
Hitachioota-shi,
Ibaraki 313-0022 (JP)
|
| (74) |
Representative: Beetz & Partner |
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Patentanwälte
Steinsdorfstrasse 10
80538 München
80538 München (DE) |
| (56) |
References cited: :
AT-B- 397 440
US-A- 5 821 713
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AT-B- 399 602
US-A- 5 903 129
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- STAINES C S ET AL: "A periodic burst injection method for deriving rotor position
in saturated cage-salient induction motors without a shaft encoder" , INDUSTRY APPLICATIONS
CONFERENCE, 1998. THIRTY-THIRD IAS ANNUAL MEETING. THE 1998 IEEE ST. LOUIS, MO, USA
12-15 OCT. 1998, NEW YORK, NY, USA,IEEE, US, PAGE(S) 617-624 XP010313110 ISBN: 0-7803-4943-1
* page 620, paragraph III; figure 4 * * page 622, paragraph IV *
- KULKARNI A B ET AL: "A novel position sensor elimination technique for the interior
permanent-magnet synchronous motor drive" 1989 XP010090882 * page 775, column 2 *
- OGASAWARA S ET AL: "An approach to real-time position estimation at zero and low speed
for a PM motor based on saliency" , INDUSTRY APPLICATIONS CONFERENCE, 1996. THIRTY-FIRST
IAS ANNUAL MEETING, IAS '96., CONFERENCE RECORD OF THE 1996 IEEE SAN DIEGO, CA, USA
6-10 OCT. 1996, NEW YORK, NY, USA,IEEE, US, PAGE(S) 29-35 XP010201104 ISBN: 0-7803-3544-9
* the whole document *
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