Energy-saving Circuit Research Articles

Energy Efficiency of Pneumatic Actuating Systems with Pressure-Based Air Supply Cut-Off

To exploit the energy-saving potential of pneumatic actuator systems, various energy-saving circuits have been developed in recent decades. However, the principle of a pressure-based air supply cut-off has only been considered to a limited extent. This article introduces a possible pneumatic circuit solution for this principle and evaluates it via simulation and measurement of the saving potentials and limits of the developed circuit for typical industrial drive tasks. The conducted investigation shows the suitability of the developed energy-saving circuit, especially for the reduction of the actuator oversizing, achieving energy savings of 71% without performance loss. Conversely, applying this principle to an already well-sized cylinder comes with limitations and requires additional damping. The final economic analysis demonstrates that the application of the circuit could achieve comparatively short amortisation times of approx. 1.9 years for a setup with standard pneumatic components.

Creating a biophysical trapping device based on an optical radiation source with a light-emitting diode

The article addresses the problems of using semiconductor LEDs in the creation of environmentally friendly, high-efficiency, energy-efficient biophysical trapping device and their introduction into agriculture. The use of semiconductor LED lamps that are compatible with the spectrum of solar light in the device is preferred over other methods in that it is effective in combating pest flying insects and does not harm beneficial insects. The proposed device is environmentally friendly compared to chemical and biological methods of pest control. The device consists of an energy-saving circuit, which does not require high energy in use. This prevents inconveniences when used in field conditions, and the efficiency of useful work in the fight against flying insects is higher than other methods.

Energy Saving Analysis and Simulation for Home Electricity

This paper presents the energy saving method by applying the voltage control technique on a single-phase AC source to a thyristor rectifier and an IGBT inverter with LC filter. Based on the LC filter parameter, the values of the gain for the controller are obtainable. The proposed controller structure consists of two loops arranged in a cascaded model. The output of the first loop is the capacitor current. This current is added to the load current in order to obtain the current reference. This reference current value will be compared with the inverter current which produces the error signal to be fed into the second loop in the cascade system. The output of the second loop is the inverter voltage. This voltage is added to the load voltage to produce the voltage reference. This reference is fed to the pulse width modulation generator via the controller and compared with the triangular wave. This energy-saving circuit is designed in blocks using MATLAB Simulink.

Remote control rain sampler for rainfall runoff collection

Abstract The availability of high spatial resolutions rainfall runoff data is vitally important in water resource estimation and management. To settle the problem of untimely collection of rainfall runoff caused by the uncertainty of rainfall, an unattended rainfall runoff collector with remote control was developed. According to the whole system, when the trigger device detects rainfall runoff, an energy-saving circuit connects, and the sampler is powered. At the same time, state and position information are sent to the mobile phone through the communication module. Then, the mobile phone sends instructions and starts an order back to the sampler through texts based on different requirements. The instructions and start order are then passed to the single-chip micyoco (SCM) control system, which also occurs via the communication module. A disconnected signal will be sent to the energy-saving circuit after the rainfall runoff collection. This signal will power off the sampler at the end. Test experiments showed that the maximum sampling error of the sampler developed in this paper was 1′02″, and the minimum sampling error was 22″.

Friction Characteristics of a Cylinder Based on a Bridge-Type Pneumatic Energy-saving Circuit

A bridge-type energy-saving circuit is a new type of pneumatic system that uses four on-off valves to control the inlet and exhaust of two cylinder chambers. It saves energy through the open-and-close sequence of the four control valves. Cylinder friction is the key factor in accuracy and stability of the bridge-type pneumatic energysaving circuit. This paper focuses on research of the circuit’s friction characteristics. Based on friction theory and the classic Stribeck model, a composite dynamic friction model of a cylinder in a circuit system is established, and a cylinder friction test platform is constructed. The Nelder-Mead algorithm is used to identify static parameters of the model through the relationship between friction and velocity while the piston is moving. Friction model verification with error analysis is achieved by comparison with the traditional friction model. Experiments with the energy-saving circuit under certain conditions are carried out to illustrate the effectiveness of the composite dynamic friction model. Finally, compared with existing friction model, the validity of the model is proved to be applicable to different working conditions.

Design and Realization of Intelligent Energy-Saving Circuit

An intelligent energy-saving system is designed in order to save energy for the lighting system for classroom, which is composed of single chip, artificial wireless control module, pyroelectric infrared detection module and sunlight intensity detection module. The system can run in two ways of manual control and automatic control. In the case of automatic control, when the light intensity is less than the preset value and there are some people in the classroom, the lamp will light-on automatically. The lamp will remain lighting-on in a period of time after the leaving of people, and the delay time can be set according to the actual situation.

Mobile Robot Hydraulic Drive Energy-Saving Circuit Simulation Based on the High-Frequency Switching Valve

Due to the constraints from weight, volume and other various factors, mobile robot hydraulic drive system uses single pump and multi-actuator hydraulic drive structure. The high efficiency of the structure is the key to the successful application in hydraulic robot. The traditional servo valve control system possesses good position control ability, but it has the problem of bilateral throttling loss and great valve port pressure decrease. This paper proposes a hydraulic position control system based on high-frequency switching valve, which controls valve port opening and closing, through the PWM signals, so as to control flows, guarantee the position control precision as well as reduce the required system pressure, thereby achieving the effect of energy conservation. By using AMESim and Adams co-simulation and simulating the real stress environment, the feasibility of energy-saving in high frequency switching valve circuit has been verified.