The Difference is in the Name

A Useful Introduction to Electric Motors

Electrical engineers are required to know the differences between various types of electric motors. Without these motors, particular types of power tools, motor vehicles, and household appliances would not be possible. At Romanoff Industries, we offer an extensive array of electric motors and other electrical industry equipment to meet the various applications of our customers. Some of the basics of DC and AC electric motors are covered below.

DC Motors

DC is short for “direct current.” These were the first type of motors commonly employed due to the fact that they are able to be powered from an existing power distribution system. The speed generated from a DC motor can be modified through the intensity of the current it produces.

Brushless (BLDC) motors do not have an internal brush. The current in the motor is alternated electronically through the magnetic field and the stator.

Brushed (BDC) motors consist of a brush on the inside that commutates (alternates) electrical current through the armature equal to the speed of the rotation of the motor.

AC Motors

Alternating current motors, or more often referred to as AC motors, are motors that reverse the direction of electrical current at regular times.

Asynchronous motors, commonly referred to as induction motors, depend completely on AC as their power source. On the other hand, synchronous motors require both AC and DC for sources of power.

To learn about the extensive selection of electric motors, transformers, and gear reducers we offer at Romanoff industries, call us today at 800.366.8778 or drop us an email at