How fast can a 350W motor actually run?
2 Answers
30KM/H is the maximum speed of a 350W motor. This data is obtained under good vehicle conditions, flat road surfaces, and no overload. The actual mileage is related to various factors such as vehicle condition, road condition, and load. Moreover, as the battery capacity decreases with use, the mileage will gradually shorten. Motors, commonly known as electric machines, are electromagnetic devices that realize electrical energy conversion or transmission based on the law of electromagnetic induction. The function of the motor: In a circuit, the motor is represented by the letter M. Its main function is to generate driving torque, serving as the power source for electrical appliances or various machinery. The generator is represented by the letter G in the circuit, and its main function is to convert electrical energy into mechanical energy. Precautions for motor maintenance: Usage environment: The usage environment should always be kept dry, the motor surface should be kept clean, and the air inlet should not be obstructed by dust, fibers, etc. Thermal protection activation: When the motor's thermal protection continuously activates, it should be determined whether the fault comes from the motor, overload, or the protection device's setting value is too low. After eliminating the fault, it can be put into operation. Ensure good lubrication for the motor: Generally, after the motor runs for about 5000 hours, the grease should be replenished or replaced. If overheating of the bearing or deterioration of the grease is found during operation, the grease should be replaced in time. When replacing the grease, the old lubricating oil should be removed, and the bearing and bearing cover oil groove should be cleaned with gasoline. Timely replacement of bearings: When the bearing's life ends, the vibration and noise of the motor operation will increase significantly. When the radial clearance of the bearing reaches the following value, the bearing should be replaced. Disassembling the motor: When disassembling the motor, the rotor can be taken out from the shaft extension end or the non-extension end. If it is not necessary to remove the fan, it is more convenient to take out the rotor from the non-shaft extension end. When pulling the rotor out of the stator, care should be taken to prevent damage to the stator winding or insulation.
Last time I tried an electric bicycle with a 350W motor, carrying a 70kg weight at full speed on flat roads, it could only reach about 25 km/h and couldn't go faster. The performance was even more noticeable when climbing hills, struggling to maintain even 15 km/h. It was slightly faster with a new battery, but after half a year of use, the speed dropped to around 22 km/h at most. Strong winds could also slow it down significantly. Real-world tests show that you shouldn't trust the numbers on promotional materials. When choosing a bike, always check the maximum speed listed in the manual. A 350W motor is sufficient for commuting, but don't expect it to be too fast.
