Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-02-01
2008-10-14
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S432000, C363S034000, C363S037000
Reexamination Certificate
active
07436147
ABSTRACT:
A motor driving apparatus drives a motor by means of an AC/AC direct converter such as a matrix converter. The motor driving apparatus is provided with a current detecting section for detecting motor currents, a comparing section for detecting whether motor current detection values have exceeded a restriction level, an induction voltage calculating section for calculating induction voltages of the motor, a switching section, and a PWM pattern generating section. When the comparing section detects that the motor current detection values have exceeded the restriction level, the switching section supplies the induction voltages calculated by the induction voltage calculating section to the converter as output voltage instruction values.
REFERENCES:
patent: 4894763 (1990-01-01), Ngo
patent: 5909367 (1999-06-01), Change
patent: 6058028 (2000-05-01), Czerwinski
patent: 6295215 (2001-09-01), Faria et al.
patent: 2004-180390 (2004-06-01), None
Odaka Akihiro
Sato Ikuya
Duda Rina I
Fuji Electric FA Components & Systems Co., Ltd.
Kanesaka Manabu
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