Measures to improve the energy efficiency of high-efficiency and energy-saving motors

In the previous article, the editor has introduced in detail the energy-saving measures of high-efficiency energy-saving motors. It can be seen that energy-saving of high-efficiency energy-saving motors is a systematic project, which involves the entire life cycle of the motor. So how can we improve the energy efficiency of high-efficiency and energy-saving motors? Next, the corresponding improvement measures will be introduced below. I hope it can help everyone!

As the power source of various equipment such as fans, water pumps, compressors, and mills, high-efficiency and energy-saving motors are widely used. Therefore, improving the efficiency of motors and actively promoting high-efficiency and energy-saving motors will have a great impact on national economic construction, energy conservation, and environmental protection. etc. have a positive promoting effect.

For high-efficiency and energy-saving motors, it can be explained as follows: the efficiency of the designed and manufactured motors is higher than that of ordinary standard motors. Reducing total losses is the way to improve motor efficiency. The average efficiency of the general series is 0.87. As a high-efficiency motor series, if its loss decreases by more than 20% on average, the average efficiency of the series should also increase by more than 2.6 percentage points.

Measures to improve the energy efficiency of high-efficiency and energy-saving motors are as follows:

1. Increase effective materials and reduce winding loss and iron loss

According to the similar principle of high-efficiency and energy-saving motors, when the electromagnetic load remains unchanged and mechanical losses are not considered, the loss of the motor is approximately proportional to the third power of the linear size of the motor, and the input power of the motor is approximately proportional to the fourth power of the linear size. Proportional to the square, it can be seen that the loss is inversely proportional to the linear increase in the effective material size.

2. Use better magnetic materials and process measures to reduce iron consumption and improve the efficiency of the motor. Theoretically, it is hoped to increase the line load and air gap flux density of high-efficiency and energy-saving motors as much as possible. In fact, the former is affected by the insulation level and cooling method. However, with the improvement and development of cooling technology, the line load value can be increased, and the latter This is due to the low magnetic permeability of the ordinary silicon steel sheet material used.

If high magnetic permeability is used, especially high-quality cold-rolled silicon steel sheets with high magnetic permeability and low specific loss under medium and high magnetic fields, it can provide conditions for "increasing the air gap magnetic flux density, adjusting line load and line current density".

We can apply high magnetic permeability, low specific loss cold-rolled silicon steel sheets, or based on the application of high-quality silicon steel sheets, appropriately optimize and adjust the overall high-efficiency energy-saving motor, and use other related technologies at the same time, which is helpful for improving motor efficiency. obvious effect.

In fact, within the scope of conditions permitting, we can also choose room-temperature superconducting materials, which can further reduce motor losses and further improve the efficiency of the motor.