Can DC Motors Function Without a Commutator?

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In summary, the conversation discusses the possibility of creating a DC motor without a commutater and how this is achieved through the use of brushless DC motors and universal motors. The distinctions between AC and DC motors are also mentioned, with the explanation that it is not just the power source but also the operation that determines the type of motor. The concept of an intelligent electronic controller for motors is also briefly mentioned.
  • #1
GeekyGuy
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I've been pondering over this for a while. Is it possible to make a DC motor that does not require a commutater.
 
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  • #2
Is it possible to make a Motor output a DC voltage without commutation? I don't fully understand your question.

Suer
 
  • #3
Look at brushless DC motors like used on some computer fans - the switching of north/south poles on the stator is handled by transistors that switch back and forth instead of brushes and the armature is permanent magnets.

If you take a universal motor like used in a corded power drill, it does run on AC current from the wall but will also run on DC because its really just a DC motor with the stator and armature wound in series. Sure it has brushes that wear out, but its still cheap to build and has great startup torque and speed control that a shaded-pole AC induction motor couldn't touch and is why its used.

So sometimes the distinctions between what is considered an AC or a DC motor can be blurred somewhat by their operation and not just the power source.
 
  • #5
Thanks. :cool: A motor that uses an intelligent electronic controller. I never heard of that before, but it sounds pretty cool.
Thanks again.
 

1. What is a DC motor?

A DC (direct current) motor is an electrical machine that converts direct current electrical energy into mechanical energy. It is commonly used in various applications such as electric vehicles, industrial machinery, and household appliances.

2. How does a DC motor work?

A DC motor works by using the principle of electromagnetism. It consists of a stator (stationary part) and a rotor (rotating part) with coils of wire that carry an electrical current. When the current flows through the coils, it creates a magnetic field that interacts with the permanent magnets on the rotor, causing it to rotate.

3. What are the main types of DC motors?

The main types of DC motors are brushed and brushless motors. Brushed motors use brushes and a commutator to transfer electrical energy to the rotor, while brushless motors use electronic controllers to switch the current flow in the coils. Other types include permanent magnet, shunt, series, and compound motors.

4. What are the advantages of using a DC motor?

Some advantages of using a DC motor include high torque at low speeds, simple control and speed regulation, and relatively low cost. They are also efficient, durable, and have a long operating life.

5. What are the applications of DC motors?

DC motors have a wide range of applications in various industries, including transportation (electric vehicles, trains, and ships), robotics, manufacturing, and household appliances (blenders, fans, and power tools). They are also used in renewable energy systems such as wind turbines and solar panels.

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