بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — Fall 2009-2010. Instructor: Eng.Moayed N. EL Mobaied. Lecture 23. HALF-BRIDGE WITH AN R-L LOAD.
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Assuming that Io is established, the transient has disappeared and load current waveform is symmetrical
If the load is purely resistive, the feedback diodes are not required.
Q1 and Q3 are turned on for the positive half-cycle, Q2 and Q4 for the negative half-cycle. The load voltage value is twice that of the half-bridge, i.e. for ideal switches the full battery voltage appears across the load. The rms load current is twice that of the half-bridge, and the load power is increased by a factor of 4.
For analysis of the full-bridge, with an R-L load, equations (4.5)-(4.7) are used with the full battery voltage instead of the centre-tapped value.