[Introduction] Automatic integration, as the name implies, includes motor type, control chip, power stage, and user-friendly and intelligent software algorithm. And it is one of the core competitiveness of motor companies, so with the rise of high efficiency, miniaturization and digitalization, the production process of motors will also be further intelligently automated.

At present, the motor industry, as the most widely used electrical equipment, is an important part of the manufacturing industry in various countries. my country has proposed in the "Thirteenth Five-Year Plan" outline to implement "Made in China 2025" in depth, the purpose is to promote the development of the manufacturing industry in the direction of high-end, intelligent, green and service.

However, for a long time, energy consumption has always been a major problem in the motor industry, which is concentrated in four aspects: low motor load rate, asymmetric or low voltage of the power supply, old motors still in use, and improper maintenance management. I believe that many people in the motor industry have encountered motor heating, vibration, shutdown, failure, and even burning.

Which methods are worth studying for energy consumption performance?

Part of the product display at the 15th (Shenzhen) Motor Drive and Control Technology Seminar

So how to grasp the performance and cost affordability of high-efficiency motors, reduce energy consumption and improve efficiency, is an unavoidable problem for major motor companies. In addition, since the loss distribution of the motor will vary with the size of the motor power and the number of poles, and even different magnetic materials are the key to affecting the size of the loss, different measures should be taken to reduce energy consumption.

In this regard, Cao Guangzhong believes that compared with ordinary motors, the most important point for energy-efficient motors is to optimize the overall design steps, such as selecting material components that can reduce losses, which can reduce unprovoked increased energy consumption.

In addition, the reasonable design structure of the ventilation type is also very important to improve the efficiency of the motor and reduce the wind wear. According to relevant tests, the wind wear of high-efficiency motors with high power is about 30% lower than that of ordinary motors. It can be seen that the degree of motor loss depends on the trend of large fluctuations in the design structure.

Furthermore, first of all, with the advancement of the times, the work on the design efficiency of the motor drive must be gradually increased. Secondly, the proportion of the drive also determines the pros and cons of the motor drive efficiency, from 60% in the early days to 70-80% today. , even 90%, and finally, focusing on the design of structure, software, algorithm and other aspects can make the motor capacity achieve the best energy-saving effect. Huang Zhikai added.

In fact, in practical applications, the energy consumption of the motor when running a load is not at full load most of the time. However, due to the difficulty in speed regulation of the early AC brush motor, it is often caused by the windshield, the return valve or the on-off time. To adjust the air volume or flow, at the same time, it is difficult to start and stop frequently, and the power shock is large, which will cause unnecessary power loss.

Of course, it is now the era of the transition from the AC and DC brushed motors to the DC brushless motors, and the efficiency of the motors is slowly improving. Gu Changlin believes that the energy consumption of the motor is still inseparable from its structure and driving method, and these two aspects can be subdivided into sine wave and square wave control methods. The overall cost of the former will be driven by an external MCU, and the efficiency will be higher. high, the energy consumption will be lower, and the cost will be relatively high; while the latter will have lower efficiency, high energy consumption, and relatively low cost.