Translated Abstract
Linear compressor is a new compressor, which makes a piston reciprocates under the action force in linear motor-driving. It has high mechanical efficiency, a simple structure, easy control and so on. Recently, linear compressor is more civilian-based and been used in many cooling devices. But the same time, the linear compressor displays some disadvantages that are difficulty in controlling dead center position, the piston stroke. Therefore, how to control them more reasonable is a focus and difficult in linear compressor study. Especially, these are more realistic and practical value in the growing shortage of energy.
To improve these shortcomings, this paper has two aspects research based on previous control system research of linear compressor. It provides a stable, practical and reliable piston displacement detection and controller of linear compressor without displacement sensor, then it is applied in the refrigerator cooling system:
This paper accurately detects the piston stroke of linear compressor according to the relationship of current and voltage to assure implementation of piston displacement detection and controller of linear compressor.
The paper uses a fuzzy control algorithm based on fuzzy identification to better control of the piston stroke, the top dead center position. It gives hardware, software and optimal designs of the linear compressor to improve the efficiency of refrigeration cooling system and linear compressor.
The results show that the scheme of piston displacement detection and controller not only has a simple structure, measurement accuracy, good scalability and low cost, but also can improve the efficiency. This promotes the application and development of linear compressor.
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