Overview:
To measure the performance of UPS inverters, there are usually some indicators: voltage, frequency, total harmonic content (THD), load regulation, dynamic response, etc. The quality of these indicators is closely related to the control of the inverter. of. Since the analog control technology of power electronic equipment has some shortcomings that it cannot overcome, the control method has lagged far behind the development of modern control theory, so its transition to digital control is an inevitable trend.
The application requirements of UPS are very high. Therefore, the single voltage loop control obviously cannot meet the application requirements. In order to improve the static dynamic characteristics of the inverter, multi-loop control technology is needed. Current mode control is a multi-loop control strategy. It uses the error voltage regulation output as the feedback current command to obtain better static dynamic characteristics, but it cannot solve the output voltage THD under non-linear load (such as rectifier bridge load). Higher problem. In recent years, with the introduction of dedicated DSP for motor control, DSP-based inverter digital control technology has developed rapidly, and the application of waveform repeat control technology can effectively solve the above mentioned problems. However, there are disadvantages to repeated control, that is, its dynamic characteristics are very poor. The composite control introduced in this paper combines the above two control methods to improve strengths and avoid weaknesses and achieve good results.
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Application scenario of horizontal bending
When the cable tray is laid indoors, if the straight section of the installation cable tray goes to the corner, it needs to make a turn. In this scene, the horizontal turn should be completed by connecting the horizontal elbow with the cable cable tray on both sides of the wall at 90 degrees respectively. If there is no other object at the corner of the corner, the Angle of horizontal bending can be 90°. If there are other objects, it can be designed to be 30°, 45°, 60° to fit on it.
The horizontal bend of a cable tray is an essential component in cable management systems. It is used to change the direction of cable trays horizontally, allowing for the routing of cables around obstacles such as walls or machinery. The horizontal bend is commonly used in industrial and commercial applications, where large amounts of cables need to be organized and protected.
Cable trays are used to support and protect cables in various applications. They are available in different materials such as steel, aluminum, and fiberglass. The horizontal bend is available in different sizes and materials to suit different cable tray systems.
One of the main advantages of the horizontal bend is its flexibility. It can be used to create a variety of angles and turns, allowing for efficient routing of cables. This flexibility also makes it possible to customize cable management systems to fit specific site requirements.
Another advantage of the horizontal bend is its durability. It is designed to withstand harsh environments and heavy loads, ensuring that cables are protected and supported at all times. The materials used in the construction of the horizontal bend are corrosion-resistant, making it suitable for use in outdoor and corrosive environments.
Horizontal Bend,Reducer Horizontal Bend,Standard Horizontal Bend,Offset Horizontal Bend
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