Title :
Fine power control by discontinuous phase-controlled switching
Author :
Asghar, Syed M Jamil
Author_Institution :
Dept. of Electr. Eng., Aligarh Muslim Univ., India
fDate :
3/1/1999 12:00:00 AM
Abstract :
Different voltage control techniques are commonly used for heating power control. In the proposed method, the drawbacks of integral-cycle control and phase-controlled switching techniques are removed by combining them together. Step and fine voltage variations are achieved by the former and latter methods, respectively. Load resistance is replaced by several equivalent parallel resistances to eliminate subsynchronous harmonics completely, to reduce higher order harmonics significantly, and to bring power factor close to unity
Keywords :
harmonics suppression; phase control; power control; power factor correction; resistance heating; switching circuits; thyristor circuits; voltage control; discontinuous phase-controlled switching; fine power control; fine voltage variations; heating power control; higher order harmonics reduction; integral-cycle control; power factor; step voltage variations; subsynchronous harmonics elimination; Circuits; Delay; Digital filters; Finite impulse response filter; Passband; Polynomials; Power control; Power harmonic filters; Radiofrequency interference; Voltage;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
