How to realize energy saving and consumption reduction of asynchronous motor
How to realize energy saving and consumption reduction of asynchronous motor: Asynchronous motor is an indispensable production equipment for industrial and mining enterprises, and power plants are indispensable. All the transfer equipment of pumps and fans are driven by asynchronous motors. There are dozens of high and low voltage asynchronous motors in one power plant. For example, the smallest one unit of the Douhe Power Plant also has about 50 units. This does not include dozens of electric motors for electric gates. Such a large number of motors should focus on energy saving and consumption during operation, and increasing the efficiency of enterprises should be considerable. The problem lies in how to reduce the energy consumption of the motor and improve the efficiency of the motor to increase the economic efficiency. The following is an analysis of the composition of the total loss of the asynchronous motor and the effective reduction of the loss.
First, the composition of the energy loss of the asynchronous motor
1. Copper loss: stator copper loss; rotor copper loss; stray loss.
2, core loss.
3. Mechanical loss: ventilation loss; friction loss.
From the energy loss of the asynchronous motor listed above, copper loss and iron loss are not suitable for maintenance. They are determined by design, and mechanical loss can be changed. Asynchronous motors generally have a large number of stages, that is, a motor with a high number of revolutions, which has a large mechanical loss and a small copper loss; and a motor with a large number of stages, that is, a motor with a low number of revolutions, accounts for a larger proportion of copper loss than mechanical loss. Therefore, we need to reduce the mechanical loss of the motor to reduce the mechanical loss of the motor.
Second, the main method to reduce the mechanical loss of the motor
Reducing the mechanical loss of the motor is mainly solved from the following aspects:
(1) Adopting a high efficiency fan (such as a wing type axial flow fan);
(2) adjusting the gap between the hood and the outer circumference of the blade;
(3) The light load motor appropriately reduces the outer diameter of the fan;
(4) using high quality bearings;
(5) using high quality lubricants;
(6) Improve the quality of motor assembly;
Third, specific measures to reduce motor loss
