| Summary: | 碩士 === 國立雲林科技大學 === 機械工程系 === 105 === Energy saving and carbon reducing have become the primary target in industry because of global warming and climate changing. Common loads in industrial power, like AC motors, AC solenoid valves, fluorescent lamps are the most popular inductive loads. Inductive load will reduce both the power factor and loss the power of electric transmission systems. Therefore, improving the power factor to reduce the power loss of electric transmission systems is the main purpose of this thesis. Thus, a simple, low-cost circuit with energy saving (high power factor) and noise reducing for AC switching solenoids is developed in this thesis.
The commonly used concept of energy-saving AC switching solenoid valve design is usually accomplished by compensating the flow force induced in the valve body. However, the design does not have high power factor and noise reducing effect. Therefore, this thesis imitates the common method used in improving power factor of AC motor. Moreover, two circuits with simple and low-cost are implemented： a series circuit design circuit and a parallel circuit design circuit. Finally, circuit simulation, experiment and comparison are executed.
It is proved that a parallel circuit design for energy-saving is better than a series circuit design. The features of the parallel circuit for energy-saving design has two important characteristics：the power factor increased by 92% in the working range of the AC switching solenoid and secondly, the AC switching solenoid using parallel energy-saving circuit design provides a similar force output compared to the conventional AC switching solenoid. Finally, the experimental results prove that the parallel energy-saving circuit design is successfully developed in this thesis, which significantly improved the power factor of the AC switching solenoid.
Keywords：AC switching solenoid、Inductive loads、Power factor
|
|---|
