Synchronous Motors - This component is an AC motor which rotates in synch with the frequency of the AC current. They contain electromagnets which create a magnetic field that spins in time with the current. They run at a constant speed and are constructed of two basic elements, a stator and a rotor. The stator is static and does not move, the rotor, as it's name dictates, rotates. Synchronous motors are found in a number of common household and industrial items such as clocks, and tape players. In the microwave oven the motor is located centrally in the base and moves the turntable on which food is placed. The motor ensures a smooth and constant speed of rotation to help food cook evenly throughout. The motor turns the plate in a domestic unit at around 3rpm.

Waveguide Covers - This final main microwave oven component is usually constructed of a material called Mica. This is where microwaves enter the unit having been produced by the magnetron we discussed in Part 1. The cover stops food residue and grease from affecting the vital components of the oven, which may become clogged and overheat without the protection of the cover. Sometimes this cover needs replacing, though it is rare. Replacement may be necessary of the cover becomes damaged or begins to spark. It can also become less rigid over time, and cut to fit replacements are readily available.

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