Which type of motor is typically recognized as the heaviest?

The DC compound motor is often recognized as one of the heaviest types of motors due to its construction. This motor combines both series and shunt field windings which results in a more complex design. The presence of both types of windings requires additional magnetic cores and windings, adding to the overall weight. In applications where higher starting torque is needed, this type of motor is favored, and its robust construction contributes significantly to its heft.

Understanding the weight difference among motors is important as it can affect installation, mounting, and the structural considerations of the machinery or equipment they are a part of. Other types, like AC motors and induction motors, tend to have a simpler construction or are designed with lighter materials depending on their application, leading to generally lighter weights compared to the more complex DC compound motor.