Control method and control device of permanent-magnet type...

Details Control method and control device of permanent-magnet type... Control method and control device of permanent-magnet type...

2005-10-11

2005-10-11

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

C318S453000, C318S459000, C318S714000, C318S715000

Reexamination Certificate

active

06954050

ABSTRACT:
The object of the invention is to inhibit the axial displacement caused by the insufficiency of a control response angular frequency of a frequency arithmetic unit of a synchronous motor and realize high-precision torque control also in acceleration/deceleration. To achieve the object, the axial displacement of the synchronous motor caused by the insufficiency of the control response angular frequency of the frequency arithmetic unit is estimated in consideration of the control response angular frequency and input Δθc3(=Δθc1+Δθc2) including an estimated value Δθc2in addition to an axial displacement operated value Δθc1to the frequency arithmetic unit is acquired. Hereby, even if the frequency arithmetic unit has an insufficient control response angular frequency, the quantity of axial displacement which will be caused by the insufficiency is estimated as a second axial displacement signal Δθc2, is added and input. Therefore, actual axial displacement Δθc1of the synchronous motor is stable at a value substantially close to zero.

REFERENCES:
patent: 5796228 (1998-08-01), Kojima et al.
patent: 6208109 (2001-03-01), Yamai et al.
patent: 6259226 (2001-07-01), Kaitani et al.
patent: 6531843 (2003-03-01), Iwaji et al.
patent: 6690137 (2004-02-01), Iwaji et al.
patent: 6727675 (2004-04-01), Yoshimoto et al.

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