MOTION SYSTEMS HANDBOOK
Fundamentals of
dc motors
Motors can be classified in a number of different ways, but one of the most common is whether they are ac or dc motors. This division refers to the type of current that drives the motor with ac meaning alternating current and dc being direct current.
The EnduraMax 75i Series from Allied Motion Technologies is a 75-mm diameter brushless dc motor with an all-digital integrated drive. Command inputs to the motor can be ±10 Vdc, 4 to 20 mA, or via an optional CANopen or Modbus port.
Specifically, dc motors operate using magnetic fields produced in the motor, either via electromagnetic windings or permanent magnets. There is also some type of mechanism that commutates or switches the current flow, using either electromechanical means or electronically. Common dc motor types include brush, brushless, and permanent magnet (PM) motors. Brushed dc motors are sometimes referred to as wound-field motors, because a wound and lacquered coil of copper wire produces the electromagnetic field. There are permanent magnet, shunt, series, and compound-wound brushed dc motors.
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DESIGN WORLD — MOTION
DC Motors — Motion Control HB 08-19.indd 96
8 • 2019
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