★ What is the intuitive difference between a brushed high speed motor and a brushed low speed motor?
Answer: A. The high-speed motor has an overrunning clutch, which can be easily transferred in one direction and exhausted in the other direction; the low-speed motor is as easy as two-way.
B. The high-speed motor rotates with a lot of noise, and the low-speed motor has less noise. Experienced people can easily identify with their ears.
★What is the rated operating state of the motor?
Answer: When the motor is running, if the physical quantity is the same as its rated value, it is called the rated operation state. When it is working under the rated operation state, the motor can run reliably and has the best comprehensive performance.
★ How is the rated torque of the motor calculated?
Answer: The rated torque output on the click axis can be expressed by T2n. The size is the mechanical power rating of the output divided by the rated value of the transfer speed, that is, T2n=Pn, where the unit of Pn is W, and the unit of Nn is r/min. The T2n unit is NM. If the PNM unit uses KN, the coefficient is 9.55 and is changed to 9550.
Therefore, it can be concluded that if the rated power of the motor is equal, the torque of the motor is low and the torque is greater.
★ How is the starting current of the motor defined?
Answer: Generally, the starting current of the motor should not exceed 2~5 times of its rated current, which is an important reason why the current limiting protection is applied to the controller.
★ Why is the motor speed sold in the market getting higher and higher? What is the impact?
A: The speed increase of the supplier can reduce the cost. It is also a low-speed click. The speed is higher, the number of coil turns is less, and the silicon steel sheet is saved. The number of magnetic steel is also small. The purchaser thinks that the high speed is good.
When the rated speed is working, its power is constant, but in the low speed zone, the efficiency is obviously low, that is, the starting force is weak.
The efficiency is low, it needs to be started with a large current, the current is also large when riding, the current limit of the controller is large, and the battery is not good.
