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DC motor

FAQ: What are the different ways that industry classifies servo motors?

April 16, 2016 By Danielle Collins 1 Comment

motor terminology

A servo system is one in which the system’s error (in position, speed, or torque) is corrected through the use of a feedback device that compares the system’s actual performance with its commanded performance. What makes a motor a servo motor, then, has less to do with its construction and operation, and more to do […]

Filed Under: AC Motors, Brushless Motors, DC Motors, FAQs + basics, Motors, Servo Motors Tagged With: asynchronous motor, brushed motor, brushless motor, DC motor, servo motor, servomotor, synchronous motor

Best DC motors for high starting torque?

January 21, 2016 By Danielle Collins Leave a Comment

A DC motor can be constructed in various ways, and each design has specific performance characteristics, particularly regarding speed and torque production. The rotor is basically the same in all DC motors, being made of windings that generate an electromagnetic field when current passes through them. But the stator can be made of either permanent magnets […]

Filed Under: DC Motors, FAQs + basics, Motors Tagged With: DC motor, motor torque, wound motor

What is a commutator?

January 7, 2016 By Danielle Collins Leave a Comment

Commutator

The operating principle of a DC motor is based on the interaction between the magnetic field of a rotating armature and the magnetic field of a fixed stator. As the north pole of the armature is attracted to the south pole of the stator (and vice-versa), a force is produced on the armature, causing it […]

Filed Under: DC Motors, FAQs + basics, Motors Tagged With: commutation, commutator, DC motor

FAQ: What are DC shunt motors and where are they used?

December 29, 2015 By Danielle Collins Leave a Comment

DC shunt motors

In electrical terminology, a parallel circuit is often referred to as a shunt. Hence, DC motors in which the armature and field windings are connected in parallel are referred to as DC shunt motors. The variations in construction between series-wound DC motors and DC shunt motors result in some differences in operation between the two types, but […]

Filed Under: DC Motors, FAQs + basics, Motors Tagged With: constant speed motor, DC motor, parallel wound motor, series wound motor, shunt motor

What’s the relationship between current and dc motor output torque?

December 23, 2015 By Danielle Collins Leave a Comment

DC motor

Torque is a rotational force produced when a vertical force is applied at some distance from the center axis of the rotating body. The familiar equation for torque is: Where: T = torque F = applied vertical force d = distance from axis of rotation In a DC motor, the output torque is directly proportional to the […]

Filed Under: DC Motors, FAQs + basics, Motors Tagged With: current, DC motor, torque, torque calculation

The relationship between voltage and dc motor output speed

December 6, 2015 By Danielle Collins Leave a Comment

The operation of a DC motor is relatively straightforward. A coil is placed in a magnetic field, and when an electric current passes through the coil, a torque is produced, causing the motor to turn. The entire process is driven by applying electrical power to the coil, with the source voltage having a direct relationship […]

Filed Under: DC Motors, FAQs + basics, Motors Tagged With: DC motor, motor, speed

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