After entering deep summer, my mother said that she wanted to eat dumplings. Based on the principle of the genuine dumplings made by myself, I went out and weighed 2 pounds of meat to prepare dumplings by myself. Worrying that the mincing will disturb the people, I took out the meat grinder that had been hidden for a long time and had not been used for a long time, but after a while, it was smoking! I thought it was a product quality problem, but I contacted the customer service, and after some popular science, I found that I was too anxious and pressed for too long, which caused the motor to overheat. I don’t need to go into detail about the latter. I tried it after it got cold, and the motor can continue to rotate without any major problems. But I have been thinking about it, why the motors of electric fans, refrigerators, and air conditioners can run for a long time, but the meat grinder can’t?
It turns out that the motor has a working system! (Does the motor have to be scheduled too? Just kidding!)
The working system of the motor can be divided into three categories: continuous working system, periodic working system and short-time working system according to the length of the working time of the motor.
Among them, the motor with continuous duty system has a long working cycle and can run continuously under rated voltage and load conditions. The degree of heat generation is controllable and will not exceed the permitted limit, but it cannot be overloaded.
The duty cycle of the motor with periodic duty system is very short, and it can only run intermittently under rated conditions, just like when we work for a period of time and need to rest for a while, usually in a cycle, the motor continues to be loaded with the percentage between the running time and the cycle. express. The common ones are 15%, 25%, 40%, and 60%. If the motor is operated beyond the duty cycle, the motor may be damaged.
The short-time running system motor can only run for a short time under the rated conditions and within a limited time, with a short working cycle and a long stop cycle. Once the motor has reached the specified time, it must be stopped and can be restarted after cooling down.
Obviously, meat grinders and wall breakers are electrical appliances with short-time working system. The power of such electrical appliances is amplified and it is not allowed to work for a long time. bigger accident. And electric fans, refrigerators and other home appliances are long-term working electrical appliances, which can work for a long time.
Therefore, I would like to remind everyone that short-term electrical appliances such as meat grinders and wall breakers must not be operated for a long time. During use, the downtime should be as long as possible, so that the motor can be fully cooled before use. Although electric fans and refrigerators are motors that work for a long time, attention should be paid to the safety of electricity consumption during use to avoid problems such as overload and leakage.
Post time: Aug-04-2022