Low conduction losses half-bridge inverter with soft switching auxiliary circuit for induction- cooking applications

2007 ◽  
Author(s):  
Seyed Hossein Hosseini ◽  
Ali Yazdanpanah Goharrizi
Keyword(s):  
Soft Switching ◽  
Induction Cooking ◽  
Auxiliary Circuit

A Soft Switching Full-Bridge DC-DC Converter with Active Auxiliary Circuit

2015 ◽  
Vol 793 ◽  
pp. 232-236
Author(s):  
Chanuri Charin ◽  
Nur Fairuz Mohamed Yusof ◽  
Mazwin Mazlan ◽  
Noor Haqkimi Adb Rahman
Keyword(s):  
Industrial Applications ◽  
Soft Switching ◽  
Experimental Results ◽  
Switching Loss ◽  
Pv System ◽  
Power Switches ◽  
Bridge Rectifier ◽  
Scale Down ◽  
Converter Topology ◽  
Auxiliary Circuit

DC-DC converters are widely used in many applications such as power supplies, PV system, renewable energy systems and industrial applications. One of the main problems in dc-dc converters is the switching loss which affects efficiency and also the power density of the converter. To alleviate the switching loss problem this paper proposes novel soft switching PWM isolated dc-dc converters topology. The proposed full bridge dc-dc converter with active auxiliary circuit is designed and tested with full-bridge rectifier diode. The proposed converter is designed and evaluated in term of soft switching. In the proposed topology, the soft switching operations are achieved by charging and discharging process of the capacitor and additional switches. In the proposed topology, all the power switches operate under soft-switching conditions. Therefore, the overall switching loss of the power switches is greatly reduced. The output voltage of the converter is varied by PWM control. The effectiveness of the new converter topology is evaluated by experimental results of a laboratory scale down prototype. The obtained experimental results are found agreed with theoretical and soft switching is achieved.

A Soft Switching Control Strategy Based on Interleaved Boost Converter for BLDC Motor Drive

2015 ◽  
Vol 6 (3) ◽  
pp. 516
Author(s):  
V. Ramesh ◽  
Y. Kusuma Latha
Keyword(s):  
Control Strategy ◽  
Torque Ripple ◽  
Boost Converter ◽  
Soft Switching ◽  
Motor Drive ◽  
Bldc Motor ◽  
Switching Losses ◽  
Wide Range ◽  
Interleaved Boost Converter ◽  
Auxiliary Circuit

In this paper, Zero-Voltage-Transition (ZVT) two-cell interleaved boost Power Factor Correction (PFC) converter for voltage source Inverter (VSI) fed permanent magnet brushless DC motor (PMBLDCM) drive has been proposed Scheme reduce the torque ripple of BLDC motor drive and also reduce the switching losses of VSI for Which an auxiliary circuit is designed and added to the interleaved boost converter.  For achieving soft switching, only one switch is used in auxiliary circuit which reduces the torque ripple and switching losses. In this proposed control strategy, the DC link voltage is controlled with interleaved boost converter which is proportional to the desired speed of the BLDC motor. In this paper, six switch and four switch VSI is also implemented with interleaved boost converter topology. A comparison is made between the six switch and Four Switch VSI fed PMBLDC Motor drive and Torque Analysis as been done. To validate the proposed work, results are presented. The results showed that proposed converter control strategy operating under soft switching mode improves the efficiency of the drive system with PFC feature in wide range of the speed control.

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