The compressor, the variable capacity compressor, and the system and manner in order Drive the adjustable-speed electric motor for the cooling system

摘要

Topic This invention accesses the technology in order to improve the energy efficiency of the cooling system which has the frequency inverter.SolutionsThe technology is informed as complimentary PWM modulation, in order to open, in the past manipulates the complimentary active low order switch in the active switch which is instructed, free wheel electric current from the inverter, junction of the free wheel diode which is the path where the loss by continuity is large compared to, passing by the path of MOSFET, brings the fact that it wraps. One of the manners which execute this invention is manner of complimentary PWM modulating inside the cooling system, that system has the adjustable-speed electric motor which is controlled the inverter bridge which is manipulated by the signal of PWM modulation (11) by (10). PWM modulation has two principal phases, decreases the loss with the continuity of free wheel electric current, in the 2nd phase where free wheel electric current wraps, in order in order to improve the entire efficiency of the cooling system as a result, to open, in the past manipulates the complimentary low order active MOSFET switch intend in the active switch which is instructed. Choice figure Drawing 2