The main advantages of asynchronous (induction) motors are their robust construction, long life, low maintenance requirement and high efficiency. Since they contain no wearing parts such as brushes or commutators, they operate reliably under demanding industrial conditions.

A simple, durable design

The rotor of an induction motor is usually a so-called squirrel cage: aluminium or copper bars joined at both ends by short-circuit rings. No electrical connection is made to the rotor; current is induced in it by the rotating magnetic field of the stator. As a result, there is no need for brushes, commutators or slip rings that require maintenance. The only moving wear parts are essentially the bearings and the fan.

Key advantages

  • Low maintenance: routine work is mostly limited to bearing lubrication, cleaning and checking connections.
  • Direct-on-line operation: connected to a three-phase supply, the motor starts without any additional drive.
  • Easy speed control: with a frequency inverter, speed can be adjusted over a wide range.
  • Suited to harsh environments: a totally enclosed frame, IP55 protection and IC411 external fan cooling allow operation in dusty and humid conditions.
  • Standardisation: IEC frame sizes and mounting types (B3, B5, B14, B35) make motors from different manufacturers interchangeable.
  • Economy: a wide power range, easy availability and low operating cost.

Limitations and how to handle them

With direct-on-line starting, inrush current can reach several times the rated current; star-delta starting, a soft starter or an inverter reduces this effect. Since power factor and efficiency fall at light load, correct sizing matters. These advantages make induction motors the most common choice in industry, and they form the core of DRG Motor's product range.

For an induction motor suited to your application, request a quotation on +90 (542) 666 11 11 (WhatsApp) or at info@drgmotor.com.