PWM strategy of a matrix converter for reducing input current harmonics under high-power-factor loads

2015 ◽  
Author(s):  
Tomoyuki Yamakawa ◽  
Takaharu Takeshita
Keyword(s):  
Power Factor ◽  
High Power ◽  
Matrix Converter ◽  
Input Current ◽  
Current Harmonics ◽  
High Power Factor

High Power Factor LED Driver with Improved Inductance

2014 ◽  
Vol 610 ◽  
pp. 142-146
Author(s):  
Lun Qiang Chen ◽  
Qing Hua Chen ◽  
Ying Chun Liang ◽  
Yi Ming Lu
Keyword(s):  
Cost Effectiveness ◽  
Power Factor ◽  
High Power ◽  
Experimental Results ◽  
Input Current ◽  
Led Driver ◽  
Low Input ◽  
Interior Lighting ◽  
High Power Factor ◽  
Current Ripples

This paper proposes a novel high power factor LED driver based on SY5800A for interior-lighting applications. High power factor is achieved by using the transformer with back winding coil and the transformer with “sandwich” winding coil. In addition, the proposed driver features cost-effectiveness, high circuit efficiency, low input current ripples and a reduced components count. A sample driver is developed to supply a 15W LED interior-lighting module with a 0.99 power factor. Experimental results demonstrate the functionalities of the proposed circuit.

Summary of Rese arch Status and Control Strategies for Matrix Converter

2015 ◽  
Vol 734 ◽  
pp. 910-915
Author(s):  
Zheng Hai Sun ◽  
Jian Ping Wang
Keyword(s):  
Power Factor ◽  
High Power ◽  
Control Strategies ◽  
Electronic Devices ◽  
Matrix Converter ◽  
Power Electronic ◽  
Key Technology ◽  
High Power Factor ◽  
And Control ◽  
Further Development

With the further development of power electronic devices, matrix converter has many excellent properties. As high power factor converter equipment, matrix converter will have a great potential for its development. After reviewing the current situation from both domestic and abroad, this paper describes the key technology of Matrix Converter, including topology, modulation strategy and commutation problems. Finally make a summary of matrix converter operation’s enhancement and improvement of the ability of the method in abnormal conditions.

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