DC motors
oh dc you might be a shoe company, and also the last half of one of the best Australian bands to have existed, but before all that you were a contraction of the words direct current.
Motors are used to convert electrical energy to mechanical energy (in this case, rotation). Most DC motors have six basic parts: an armature or rotor, commutator, brushes, axle, field magnet, and stator. The stator is the stationary part of the motor, which includes the motor casing and two field (permanent) magnets. The rotor (which includes the axle and commutator) is an electromagnet that rotates with respect to the stator. The windings on the rotor make an electrical connection to the power source through the brushes and the commutator.When a current flows through the rotor windings, a magnetic field is created. The rotor experiences a torque caused by the permanent magnets in the stator causing the rotor to rotate.
This particular day we used two components of vernier, digital components by the way, to make a tachometer (A tachometer is an instrument that measures the rotational speed of a motor’s shaft in revolutions per minute (rpm).) for a fan that we used before. So we go the programming done for the fan already which was easy because it just needs to have power run through it. The fan will be running at full speed because we have yet to cover the duty cycle of a motor. So to measure the rpm we need to know how fast the blades spin, to do that there's this photogate that measures when a laser is broken(by the fan blades in this case) a program is then written to take into account how many blades there are to determine how fast the fan rotates at.
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