Electric Motor Base Speed

P number of poles.

Electric motor base speed. An induction motor slows as it is loaded. A 2 pole motor may therefore operate up to 125 over base speed before reaching its balance limit. Electric motor efficiency calculate electric motor efficiency. Base speed is hz multiplied by 60 then divides the result by half the number of poles.

N f 2 p 60 1. Many manufacturers balance their 2 pole and 4 pole rotors to the same speed 25 over the 2 pole base speed. The number of poles in the motor winding. Electrical induction motors synchronous speed the speed at which an induction motor operates depends on the input power frequency and the number of electrical magnetic poles in the motor.

Average 2 pole industrial motors can safely exceed its base speed by 25. N shaft rotation speed rev min rpm. An electric motor is an electrical machine that converts electrical energy into mechanical energy most electric motors operate through the interaction between the motor s magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor s shaft. The induction motor must run at a speed below the revolving stator field flux.

The power supply frequency and. Rated speed is the base speed minus the slip at full rated load. If a dc motor is running on a 12 v battery that is the maximum voltage available to the unit and the motor will only be able to perform at a speed rated for 12 v. The synchronous speed for an electric induction motor is determined by.

F frequency of electrical power supply hz cycles sec 1 s. Electric motors can be powered by direct current dc sources such as from batteries motor vehicles. If the battery is low and supplying less voltage. The synchronous speed can be calculated as.