AC electric motors:

Two-speed three-phase motors

Elprom Harmanli offers a standard range of two-speed three phase motors:


Two-speed three phase motors with a single winding - pole changing windings

It is applicable for electric motors with poles ratio 2:1.

1500/3000 rpm, 2p= 4/2

750/1500 rpm, 2p=8/4

500/1000 rpm, 2p=12/6


These motors are produced with a single winding according to DAHLANDER scheme. Can be offered in two different executions depending on the application and requirements:

Winding according to DAHLANDER can be designed for switching ∆/YY or Y/YY. This assures different powers and starting torque ratios at the two different rotation speeds. It is used for various applications.

In case of any additional information needed, don’t hesitate to contact us.


Two-speed three phase motors with two separate windings

It is used in electric motors with ratio between the poles respectively rotation speeds different than 1:2.

1000/1500 rpm, 2p=6/4

750/1000 rpm, 2p=8/6

750/3000 rpm, 2p=8/2






Elprom Harmanli can produce three-speed motors and multispeed motors on request.


For additional information, feel free to contact us at any time.