Patent ID: 6366048
Filing Date: 2002-04-02
Classification: H02P,Y10S

Abstract:
A method for regulating the phase current in a switched reluctance machine, whose stator windings in each phase are each connected to a DC chopper controller, which is connected to a regulator which processes control error between the required current value and a measured actual current value and applies pulse-width-modulated electrical pulses to the DC chopper controller, comprising the steps of:determining the control error from the required current values and from actual current values obtained by sampling at equidistant intervals: digitally forming a first manipulated variable from the control error using a proportional-integral characteristic, by linear superimposition of an integral element and a proportional element and by multiplying said proportional-integral characteristic by a respective electrical angular position of the reluctance machine rotor; linearly superimposing a second manipulating variable on the first manipulated variable wherein said second manipulated variable is formed as a pilot control value of a characteristic value by multiplication by the rotor rotation speed, which characteristic value is read, as a function of the phase current and as a function of the electrical angular position, from a characteristic map, which includes the derivative of the magnetic flux of the reluctance machine with regard to the electrical angular position, as a function of the electrical angular position of the rotor and as a function of the phase current.