Method and apparatus for determining the flux vector of a...

Details Method and apparatus for determining the flux vector of a... Method and apparatus for determining the flux vector of a...

H - Electricity

02

P

324/17

H02P 21/14 (2006.01)

Patent

CA 1226331

ABSTRACT OF THE DISCLOSURE For determining the flux vector, an EMF vector (es ) is formed in an EMF detector (15) from the stator current and the stator voltage, the components of which are determined in a rotating coordinate system rotated by an angle (.beta.) relative to the coordinate system which is fixed with respect to the stator. The flux vector (?.beta.) is formed in the rotating coordinate system, taking into consideration the rotary EMF component (e? ) which is generated from the flux vector through rotation by .pi./2 and multiplication by the frequency of rotation (?). The angle of rotation (.beta.) is determined by feeding the direction deviation of the flux vector (?.beta.) or a reference vector (?*) for the flux vector by the angle (.beta.) to a servo control (27 or 30, respectively), the output signal of which is fed as the speed of rotation (?) via an integrator (20) for forming the angle of rotation (.beta.).

481659

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