When using various pump products, I want to change the pump speed to reduce the flow rate based on the rated speed of the pump itself. I don't know how to adjust the speed of the centrifugal pump. In fact, there are many ways to adjust the speed of the pump. For example, the inverter can be used to control the centrifugal. The speed of the pump, below are several effective ways to adjust the speed of the centrifugal pump for reference to determine how to adjust the flow of the centrifugal pump. The speed adjustment of a rotating machine such as a centrifugal pump is a process of adjusting and controlling the rotational speed. The optimum adjustment of the centrifugal pump speed to the operating parameters (characteristic data) can be achieved by speed regulation.
A. Pole-changing logarithmic speed regulation The step-by-step speed regulation of 2--4 pole pairs is realized by the pole-changing motor. The range of speed change for changing the pole pair is quite limited, so this method of speed regulation is not the first choice for centrifugal pumps.
B. Variable slip rate speed change The method of changing the rotor potential phase to achieve speed regulation. A large slip power loss is generated in the rotor by changing the motor slip and speed regulation. Therefore, this speed control method is only suitable for low-power motors (as a humid air pump for hot water circulation pumps).
C. Frequency control Use the inverter to adjust the speed. Frequency control is the most common and ideal speed control method for three-phase asynchronous motors. The advantage is that it can achieve the best speed regulation performance, easy to use and high efficiency. At present, the most commonly used high-rise building water supply is that this type of high-rise building variable frequency water pump needs to know that you can click on the variable frequency water pump to view.
