METHOD FOR DEFINING INSTANTANEOUS VALUE OF CURRENT OF PULSE-CONTROLLED INDUCTIVE LOAD

摘要

A method of defining an instantaneous value of a current (i2e) of a pulse-controlled inductive load when the impedance of the load is known, the method comprising the steps of: measuring the output voltage (u1) of a pulsed voltage source, and measuring the output current (i1) of the pulsed voltage source. The method is characterized by further comprising the steps of: low-pass filtering the measured output current (i1) of the pulsed voltage source to produce a fundamental wave current (i1lp), defining a load current estimate (i2est) by computation on the basis of the measured output voltage (u1) of the pulsed voltage source and the impedance of the load, high-pass filtering the load current estimate (i2est), and defining the instantaneous value of the load current (i2e) by adding the high-pass-filtered load current estimate (i2hp) to the fundamental wave current (i1lp).