How fast can a 1500w motor run?
2 Answers
The speed depends on the specific voltage and current. For example, an electric vehicle with a 72v32a battery and a 1500w motor can run about 20 kilometers, and the speed of a 1500w motor can reach 180 km/h. Motor Introduction: In a circuit, a motor is represented by the letter M (the old standard used D). Its main function is to generate driving torque, serving as a power source for electrical appliances or various machinery. A generator is represented by the letter G in a circuit, and its main function is to convert mechanical energy into electrical energy. Working Principle of a DC Generator: The direction of the force on the conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a torque acting on the armature, known as electromagnetic torque in a rotating motor. The direction of the torque is counterclockwise, attempting to rotate the armature counterclockwise. If this electromagnetic torque can overcome the resisting torque on the armature (such as the resisting torque caused by friction and other load torques), the armature can rotate counterclockwise.
Last time I tested a 1500W modified electric motor, the no-load top speed could reach around 85 km/h, but it wasn't that fast when actually installed with a 48V battery and carrying a passenger. I weigh 70 kg, and on flat roads, the speed stabilized around 58 km/h. Battery capacity is particularly crucial—using low-discharge lead-acid batteries dropped the speed to just over 40 km/h, while switching to a 20Ah lithium battery generally got it up to 55 km/h. Wind resistance is also quite noticeable; riding in a crouched position adds at least 5 km/h compared to sitting upright. If you encounter an uphill or headwind, it's not unusual for the speed to drop by half. The controller also needs to be matched—a 35A current limit is about 7-8 km/h slower than a 45A one. Overall, it's sufficient for city commuting, but still falls short for highway speeds.
