A New Type of Energy-Saving Magnetic Amplifier Controlling Inductive Load
A new type of energy-saving magnetic amplifier controlling current and voltage of inductive load has been designed. The energy-saving magnetic amplifier with two windings wrapped across one iron core column can change impedance of the main winding by means of PWM controlling AC excitation current. The energy-saving magnetic amplifier has not used a special adjustable DC voltage circuit, has overcome disadvantages of complicated manufacturing process for the traditional excitation amplifier.The application shows the energy-saving excitation amplifier can achieve stepless dimming for high pressure sodium lamp to good energy-saving effect. The use cost of excitation amplifier is lower as simple production process, so its promotional value is great.
Weiguo Pan, Jianxing Ren and Yongguang Li
S. Yang et al., "A New Type of Energy-Saving Magnetic Amplifier Controlling Inductive Load", Advanced Materials Research, Vols. 347-353, pp. 3995-3998, 2012