Sinusoidal AC Voltage Regulator Using PWM Technique | ||||
| ERJ. Engineering Research Journal | ||||
| Article 3, Volume 24, Issue 3, July 2001, Page 25-33 PDF (388.92 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2001.71046 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| A. El-Sabbe | ||||
| Department of Electrical Engineering, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt. | ||||
| Abstract | ||||
| This paper proposes an AC voltage regulator for resistive loads using the PWM technique. The load voltage can be controlled using one switching element( MOSFET) and three limb magnetic circuit. The suggested regulator gives smooth variation of the load voltage and nearly sinusoidal current at the supply terminals with minimum harmonics. The power factor at the supply terminals is nearly unity over the control range of the load voltage. Equivalent circuit of the regulator is proposed. The computed results are compared with those obtained experimentally using a test model, where good agreement is achieved. I-List of symbols: RI, R 2, R.3, R4 coil resistance's from 1 to 4 respectively, L1, L 2, L3, L4 coil leakage inductance's from 1 to 4 respectively , R ,, R b, R equivalent iron losses resistance's of limb a, b, c respectively, L ,, L I,, L magnetizing inductance's of limb a, b, c respectively, ... la,lb,lc magnetizing current's of limb a, b, c respectively, Ea,Eb,Ec induced E.M.F's of limb a, b, c respectively, ... . IS, 11, ISM,, 15 supply, load, switch and capacitor current respectively, RI load resistance. | ||||
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