Servomotor current control method and servomotor

Details Servomotor current control method and servomotor Servomotor current control method and servomotor

2005-08-18

2010-06-01

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S432000

Reexamination Certificate

active

07728536

ABSTRACT:
Under a low load condition, a produced torque is small and a synthetic current command I* with respect to an armature of a servomotor is small so that a magnitude in a negative direction of a reactive current command Id* determined by Id*=−|I*|·sin θ is small. As a result, under the low load condition, the synthetic current flowing through the armature can be small, and generation of wasteful heat can be suppressed. Further, under a high load condition, because a q-axis current Iq that produces the torque is large, voltage saturation is liable to occur. However, at the same time, the overall current command I* is large under the high load condition, and Id* is large in the negative direction. Therefore, a large reactive current Id can be flowed in the negative direction, and voltage saturation under the high load condition can be effectively prevented.

REFERENCES:
patent: 6427104 (2002-07-01), Matsushita et al.
patent: 6906442 (2005-06-01), Yamaguchi
patent: 7053581 (2006-05-01), Chen et al.
patent: 7332837 (2008-02-01), Ward et al.
patent: 7489099 (2009-02-01), Fujiwara et al.
patent: 2004/0119373 (2004-06-01), Akatsu
patent: 2005/0017588 (2005-01-01), Yamaguchi
patent: 2006/0049792 (2006-03-01), Chen et al.
patent: 2008/0067960 (2008-03-01), Maeda et al.
patent: 2009/0120714 (2009-05-01), Hisanaga et al.
patent: 09-084400 (1997-03-01), None
patent: 11-178399 (1999-07-01), None
patent: 2002-305899 (2002-10-01), None
patent: 2006-074933 (2006-03-01), None
patent: 2007-151294 (2007-06-01), None
English Language Abstract of JP 09-084400 published Mar. 28, 1997.
English Language Abstract of JP 11-178399 published Jul. 2, 1999.
English Language Abstract of JP 2002-305899 published Oct. 18, 2002.
English Language Abstract of JP 2007-151294 published Jun. 14, 2007.
English Language Abstract of JP 2006-074933 published Mar. 16, 2006.
English Machine Translation of JP 09-084400 published Mar. 28, 1997.
English Machine Translation of JP 11-178399 published Jul. 2, 1999.
English Machine Translation of JP 2002-305899 published Oct. 18, 2002.
English Machine Translation JP 2007-151294 published Jun. 14, 2007.
English Machine Translation of JP 2006-074933 published Mar. 16, 2006.

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