How fast can a 72v20a1200w motor run?
3 Answers
72v20a1200w motor can reach a top speed of 60km, and can run over 50km when the battery is low. The power of the controller must be greater than the power consumption of the motor, as the motor's power consumption is quite high. It can be sped up a bit, but this will increase power consumption. If the controller is too small, its full power will cause the temperature of internal electronic components to soar. Introduction to motors: Motor (English: Electric-machinery, commonly known as "motor") refers to an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. In circuits, the motor is represented by the letter M (the old standard used D), and its main function is to generate driving torque as a 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 mechanical energy into electrical energy. Motor maintenance process: Clean the stator and rotor--replace carbon brushes or other components--vacuum F-grade pressure impregnation--drying--dynamic balance calibration.
Speaking about the speed of a 72V 20Ah 1200W motor, let me explain from a mechanical perspective. This configuration is quite common in electric vehicles. Theoretically, power calculation is simple: voltage multiplied by current gives 1440W, but the motor is only rated at 1200W, indicating some power loss. Actual speed is significantly affected by vehicle weight, tires, wind speed, and terrain. For example, a lightweight electric scooter might reach 50-60 km/h, while a heavy electric motorcycle would stabilize around 40 km/h. I've tested similar vehicles before - lighter ones accelerate faster but lose speed quickly when wind resistance increases. For maintenance, avoid constantly running at top speed to prevent motor overheating and burnout. I recommend choosing a better controller to improve efficiency - it's sufficient for daily commuting.
I've used this motor on an electric bike, and it runs quite smoothly. With a 72V battery installed, the acceleration is strong, allowing speeds of 45-55 km/h on flat roads. However, the actual experience varies from person to person. At my weight of 70 kg, the speed was stable, but a heavier friend saw speeds drop below 40 km/h. Charging and maintenance are also important—regularly check the wiring to prevent aging. I think 1200W is a mid-range power level, offering good value for money, suitable for short urban trips, but don’t expect high speeds for long distances. Remember to slow down on rough roads—safety first.
