Higher efficiency can be achieved by using the bridgeless boost topology. This new circuit has issues such as voltage sensing, current sensing and EM1 noise. In this paper, one cyde control technique is used to solve the issues of the voltage sensing and current sensing. Experimental results show efficiency improvement and EM1 performance. At the same time EM1 results show that the circuit noise is controllable. Due to the high conduction loss and switching loss, this circuit has a low efficiency at low input line.
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Among these topologies, the bridgeless boost does not require range switch and shows both simplicity and high performance. Without the input rectifier bridge, bridgeless PFC generates less conduction loss as compared to the conventional PFC.
Although the circuit structure is simple, the location of the boost inductor on the AC side makes it difficult to sense the AC line voltage and inductor current. At the same time, since the AC side inductor structure makes the output floating regarding the input line, the circuit suffers from high common mode noise.
Compared to the average current mode control, one cycle control shows many benefits such as no multiplier requirement, no input voltage sensing requirement, and no inductor current sensing requirement. Therefore, one cycle control gives an attractive solution for the bridgeless PFC circuit.
By using one cycle control both the voltage sensing and current sensing issues of the bridgeless PFC circuit can be solved. The experimental results show both efficiency improvement and good power factor correction function. At the same time EMI results show that the circuit noise is controllable. How to Cite this Article? Prathibha, K. Souza and I. Telecommunication Energy Conf. Tollik and A. Ye, Z. Yang, J. Dai, C. Yan, X. Xin, and J. Liu, W. Chen, J. Zhang, D.
Xu, and F. Kong, S. Wang, and F. Enjeti and R. Power Electronics Europe, No. Choi, J. Kwon, E. Kim, J. Lee, and B. Purchase Instant Access.
Gardarn When switching pulses are given to one of the switches the other switch will be off. Then the error produced in the output voltage is amplified and compared with the saw tooth signal to control the duty ratio pulses. As a future work the hardware circuit should be implemented using one cycle control. A prototype of voltage doubler buck converter generating a dc voltage of 12V operating at a switching frequency of 65kHz is developed.
BRIDGELESS PFC IMPLEMENTATION USING ONE CYCLE CONTROL TECHNIQUE PDF