Research On Linear Oscillation Motor Drive Control Technology For Compressor

The demand for energy increases significantly with the rapid development of economy and fossil fuels will also be depleted eventually because they are non-renewable. Byproducts of fossil fuel combustion lead to serious environmental problems, giving a great challenge to the carrying capacity of natural environment. Energy conservation is the inevitable choice to deal with a limited non-renewable energy scarcity and environmental carrying capacity challenges. Compressors are widely used in air conditioners, refrigerators and other refrigeration equipment. With the improvement of living standards, these products will become increasingly popular. Widely used conventional reciprocating refrigerant compressor uses the "rotary motor+crank rod" structure, thus its efficiency cannot be effectively improved due to a plurality of intermediate links.Aiming at the shortcomings of traditional reciprocating refrigeration compressors, in this paper linear compressor system driven by linear oscillating motor is designed and produced. Theoretical derivation, operating characteristics analysis and control method simulation are conducted. Linear oscillating motor drive control platform consists of hardware circuits, PC interface and MCU software. Hardware circuits includes power supply board, control board and the drive board. Electromagnetic compatibility of power supply circuit board is analyzed and tested carefully. Several sub-modules constitute the PC interface, such as serial setting module, parameter setting module and the drawing module. MCU software co-ordinate with PC interface, completing the task of parameter setting, waveforms drawing and the linear oscillating motor drive control. Finally, several relevant experiments are implemented on the platform, such as motor operating characteristics experiment, gas load experiment and the stroke closed-loop control experiment.The entire system operates smoothly and the efficiency of power supply board can be up to 89%. Stroke closed-loop regulation achieves good stability.