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to experience torque in the right direction at the right time to keep it spinning. View an animated video about DC motors.
Last modified on 17 June
The polarity of the field depends on the flow of the current. The next video is starting stop.
Daniele Tartaglia 2, views. Brushes are responsible for transferring current from the stationary DC voltage source to the spinning rotor. When magnetic field and electric field interact they produce a mechanical force, and based on that the working principle of DC motor is established.
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|Hence a dynamic magnetic field is generated in the motor when a voltage is applied across the brushes.
This is a clever trick: For the first half of every rotation, current flows into the armature via the blue portion of the commutator, causing current to flow in a specific direction indicated by the black arrows. Electricity flows from the positive terminal of the battery through the circuit, passes through a copper brush to the commutator, then to the armature.
Sign in to add this video to a playlist. When magnetic field and electric field interact they produce a mechanical force, and based on that the working principle of DC motor is established.
A single, degree turn is all you would get out of this motor if it weren't for the split-ring commutator — the circular metal device split into halves shown here in red and blue that connects the armature to the circuit.
Clemson Vehicular Electronics Laboratory DC Motors
Because the speed of rotation controls the flow of current in the armature, special devices must be used for starting DC motors. Learn more. Brushes are responsible for transferring current from the stationary DC voltage source to the spinning rotor.
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DC Motor MagLab
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