An IE3 AC motor is a three-phase asynchronous motor running on alternating current and placed in the Premium efficiency class under IEC 60034-30-1. Producing mechanical power through a rotating magnetic field, it is the most widely used drive element in industry, and the IE3 class makes it a reference point for energy efficiency.

How the AC Asynchronous Motor Works

The three winding groups in the stator create a magnetic field that rotates with the 50 Hz supply. This field induces current in the squirrel-cage rotor and drags it along. The rotor turns slightly slower than the field; this slip is the basis of asynchronous operation and lets the motor produce torque under load.

What the IE3 Class Means

IE3 is the Premium efficiency level, where losses are reduced compared with IE1 Standard and IE2 High efficiency classes. Higher-grade copper windings, low-loss lamination stacks and a narrow air gap cut the energy drawn from the grid for the same output power.

Speed, Protection and Insulation

At 50 Hz, 2 poles give 3000 rpm, 4 poles 1500 rpm and 6 poles 1000 rpm of synchronous speed. IP55 protection guards against dust and splashing water, Class F insulation withstands high temperature, and the S1 continuous duty rating defines suitability for uninterrupted production.

Choosing the Right IE3 AC Motor

DRG Motor builds IE3 AC asynchronous motors from 0.55 to 355 kW with cast iron and aluminium housings and B3/B5/B14 mounting options. Send us your application's load and speed profile, and we will select the right motor together.