Water pump is a very common equipment, it is everywhere in life, such as municipal water supply, farmland irrigation and heating circulating water pumps, etc. This article introduces the easy-drive GT200 series frequency converter in the Hubei Xiangyang Zhonghuan Water Supply System Application, use the frequency converter to drive the water pump, and automatically realize the constant pressure of the official website. When the water consumption is large, the frequency is automatically increased, and when the water consumption is small, the frequency is automatically reduced, which is in line with the current national energy conservation and environmental protection policy.
2. Introduction to the energy saving principle of frequency converter on water pump
Frequency conversion speed regulation applies energy-saving principles to fans and pumps
Theoretically, the fan air volume (Q), wind pressure (H) and motor speed (N), motor power (P) have the following relationship: Q1/Q2=N1/N2; H1/H2=(N1/N2)2, P1 /P2=(N1/N2)3
When the air volume decreases, the motor speed drops, the motor input power decreases rapidly. If the air volume drops to 80%, the motor speed also drops to 80%, and the motor shaft power drops to 51% of the rated power; if the air volume drops to 50%, the motor shaft power is about 14% of the actual power. Therefore, the power saving potential is great. This principle also applies to circulating water pumps for water supply. Therefore, for fans and pumps with a wide range of air volume and flow adjustment, using speed control to replace the air door and valve adjustment is an effective way to achieve energy saving.
3. Features of Easydrive GT200 Series Inverter
Easydrive GT200 series inverter is a general high-performance open-loop vector inverter with advanced control performance such as large low-frequency torque, self-identification of motor parameters, optimal acceleration and deceleration control, and wave-by-wave current limiting; powerful I/O expansion Functions, support a variety of communication control cards, can customize process control cards and other extended functions for customers; have functions that meet different process requirements, such as swing frequency control, multi-segment control, simple PLC control and other practical functions. It can be used to drive automation products such as machine tools, cables, textiles, food, chemicals, etc., to meet the performance and function requirements of different industrial equipment.
Four, scene pictures
Easy-drive GT200 series inverters have a wide range of speed regulation, high speed regulation accuracy, high operating efficiency, hard mechanical characteristics, good static stability, low energy consumption for starting and braking, and are stepless speed regulation. The use of frequency converters to control the speed of AC three-phase asynchronous motors has been widely used.