SXBP frequency conversion control cabinet design

Abstract: this article from the actual Angle, how to design variable frequency control system, and how to rotating joint design variable frequency control cabinet Keywords: inverter control system of main loop mechanical load characteristics electromagnetic design As is known to all, inverter has been used widely all walks of life. But the frequency conversion control system how to design, frequency conversion control cabinet design and manufacture to application specific requirements, as many electrical engineer and manufacturer, the customer wants to clear understanding.

This chapter from actual design and application cases, summarizes the design points, write a humble opinion, refers to the college. According to rotary union the practical and customer requirements for design In frequency conversion control system before the design, must understand the system configuration, way of working environment, the control mode, the customer specific requirements. Specific system design system is still new points equipment reform system. The old equipment modification, electrical engineer should know exactly the following parameters and requirements.
1. The motor specific parameters, the production date, the manufacturer (domestic and imported)
2. The motor of the rated voltage and rated current, phase number.
3. Motor the load characteristics of a type, the work pattern.
4. Motor starting way.
5. The work environment. Such as the temperature, protection grade, the electromagnetic radiation level, explosion-proof level.
6. Distribution specific parameters.
7. Frequency conversion ark installation position to motor position actual distance. (frequency conversion is to motor distance is very important parameters)
8. The number of variable frequency drives motor Ark and way.
9. Frequency conversion Ark and the old electrical system of switching relationship. General for Δ-Y starts with frequency conversion work is set aside, switch protection.
10. The periphery of the variable frequency is the selection of parameters and sensing transmitter sampling sites.
11. Frequency conversion control cabinet control mode, such as hand/to be automatic, local/remote, the control signal range. Whether communications network.
12. In high voltage circuit and weak electric circuits of segregation. Acquisition and control signal isolation.
13. Power supplies quality work places, such as lightning protection, surge, electromagnetic radiation. For the new frequency conversion system, electrical engineer should and mechanical engineer to drive mechanical load characteristics, the thorough understanding, to really motor type and capacity. According to fiber optic rotary joint the motor machinery load characteristics, capacity, choose the type of frequency converter, capacity. At present, the mechanical load and motor torque characteristics have many kinds, commonly used three. 1. The constant torque load. Such as the conveyor belt, lift, etc