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DC motor
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(Redirected from Dc motor)
A DC motor is designed to run on DC electric power.
- The brushed DC motor will generate torque directly from DC power applied to the motor leads, due to its internal commutation, stationary permanent magnets and rotating electrical magnets. Advantages of a brushed DC motor include low cost, good reliability and simple control of motor speed. Disadvantages are maintenance and life span for high use applications. Brushed DC motors require a significant amount of maintenance to work properly. This involves replacing the brushes and springs which carry the electric current as well as cleaning or replacing the commutator. The root of the problem is transferring the electrical power from the stationary case outside of the motor to the spinning wire windings of the rotor inside the motor.
- Synchronous types, like the brushless DC motor and the stepper motor will lock up on DC power, and require external commutation to generate torque.
- The Brushless DC motor is one solution to the weakness present in brush type DC motors. Advantages of the brushless motor include long life span, little or no maintenance, and good efficiency. Disadvantages include high cost and more complicated motor speed controllers. Brushless motors use a rotating permanent magnet and with stationary electrical magnets on the motor housing. This eliminates the complication of getting power to a rotating system.
- Other types are purely DC and require no commutation.
- the homopolar motor
- the ball bearing motor
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| Broad Motor Categories | Synchronous motor • AC motor • DC Motor |  |
| Conventional Electric Motors | Induction • Brushed DC • Brushless DC • Stepper • Linear • Unipolar • Reluctance | |
| Novel Electric Motors | Ball bearing • Homopolar • Piezoelectric • Ultrasonic • Electrostatic | |
| Motor Controllers | Adjustable-speed drive • Direct Torque Control • Direct on line starter • Electronic speed control • Variable-frequency drive | |
| See also | Barlow's Wheel • Nanomotor • Traction motor • Lynch motor • Mendocino motor • Repulsion motor • Inchworm motor • Booster (electric power) • Brush (electric) | |
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