A Fixed Band Hysteresis Current Controller for Voltage Source AC Chopper

Most high-performance ac drives utilize a current controller. The controller switches a voltage source inverter (VSI) such that the motor current follows a set of reference current waveforms. Fixed-band hysteresis (FBH) current control has been widely used for the PWM inverter. We want to apply the same controller for the PWM AC chopper. The aims of the controller is to optimize the harmonic content at both input and output sides, while maintaining acceptable losses in the ac chopper and to control in wide range the fundamental output voltage. Fixed band controller has been simulated and analyzed for a single-phase AC chopper and are easily extended to three-phase systems. Simulation confirmed the advantages and the excellent performance of the modulation method applied for the AC chopper.

Authors:

• K. Derradji Belloum
• A. Moussi

Keywords:

• AC chopper
• Current controller
• Distortion factor
• Hysteresis
• Input Power Factor
• PWM.

References:

[1] A. Tripathi, "Comparative analysis of fixed and sinusoidal band
hysteresis current controllers for voltage source inverters", IEEE Trans
on IE, vol.39, n┬░.1, February 1992, pp.63-73.
[2] G.N.Revankar, "Symmetrical pulse width modulated Ac chopper," IEEE
Trans. on Industrial .Electronics, vol.29, no.3, 1980, pp. 210-212.
[3] B.W.Williams, "Asymmetrical Modulated AC chopper," IEEE Trans. on
Industrial .Electronics, vol.29, no.3, 1982, pp.181-185.
[4] D.Jang, G.Choe, and M.Ehsani, "Asymmetrical PWM Technique with
Harmonic Elimination and Power Factor Control in AC choppers," IEEE
Trans. on Power Electronics. vol.10, no.2, 1995, pp. 175-1842.
[5] Y.Hongxiang, L.Min, J.Yanchao, "An advanced Harmonic Elimination
PWM Technique for AC choppers," IEEE Trans. on Power Electronics
Specialists Conf., Vol.1, June 2004, pp.161-165.
[6] A.Mozder, "Three-phase ac power control using power transistor,"
IEEE Trans. Industrial. Applicat., vol. 12, no.5,1976, pp. 499-505.
[7] E.EL.Bidweihy, "Power factor of ac controllers for induvctive loads,"
IEEE Trans.on Industrial .Electronics, vol.27, no.3,1980, pp. 210-212.
[8] N.A.Ahmed, "A new configuration of single-phase symmetrical PWM
AC chopper voltage controller," IEEE Trans. on Industrial .Electronics,
Vol. 46, No 5, Oct.1999, pp. 942-952.
[9] D-H.Jang, G-H.Choe, "Improvement of input power factor in AC
choppers using asymmetrical PWM tech," IEEE Trans. on Industrial
.Electronics, Vol.42, No2, April 1995, pp. 179 - 185.
[10] K.E.Addoweesh, "Microprocessor based harmonic elimination in
chopper type ac voltage regulators," IEEE Trans. Power Elecronics,
vol.5, no.2, April 1990,pp.191-200.
[11] A.Kwamura, "Instantaneous feedback controlled PWM inverter with
adaptive hysteresis," IEEE Trans on Industrial. Applicat, vol.20, no.4,
July/August, 1984.
[12] C.Rossi, "Robust current controller for three inverter using finte-state
automation", IEEE Trans on Industrial .Electronics, Vol.42, n┬░.2, April
1995, pp.169-178.
[13] M.S.Khanniche, I.D.W.Lake, "Real time hysteresis controller for relay
testing," IEE Proceedings on E.P.A, Vol. 141, no 2, March 1994, pp.
71-76.