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Joel Turchi

Applications Engineer
Joel Turchi holds an engineering degree from the ENSEEIHT school, part of the National Polytechnic Institute of Toulouse. With 20 years of power supply design experience at Motorola and ON Semiconductor, Joel is a regular contributor of contributed articles for trade magazines as well as application notes for ON Semiconductor. Turchi holds 12 issued US patents pertinent to control techniques, with several others pending. Joel has originated several new concepts in the power conversion arena through the introduction of PWM and PFC controllers. Among these circuits, the MC44608 (controller for flyback converters with secondary reconfiguration), the NCP1653 (CCM PFC controller) and the NCP1631 (interleaved PFC controller) have set the pace for new industry standards in the power conversion field.

Care in compensating a PFC stage can improve power factor and lower total harmonic distortion 

著者: Joel Turchi - 2015-06-22 12:54:26.0

Care in compensating a PFC stage can improve power factor and lower total harmonic distortion...




Does a Perfect PFC Stage Necessarily Provide Unity Power Factor?  

著者: Joel Turchi - 2014-10-29 09:18:10.0

Assume we have designed a PFC stage that perfectly shapes the input current. Will we have a nearly unity power factor (PF)? Not necessarily as the EMI filter capacitor unfortunately degrades the PF.

If you are not convinced, run this simple simulation.

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