When you feed in DC, the electromagnet works like a conventional long term magnet and generates a magnetic field that’s at all times pointing in the same direction. The commutator reverses the coil current every time the coil flips over, just like in a straightforward DC motor, so the coil always spins in the same direction.
When you feed in AC, however, the current moving through the electromagnet and the current moving through the coil both reverse, exactly in step, therefore the force upon the coil is constantly in the same direction and the engine always spins possibly clockwise or counter-clockwise. What about the commutator? The frequency of the current changes much faster compared to the engine rotates and, because the field and the existing are always in step, it doesn’t actually matter what placement the commutator can be in at any provided moment.

Small electric motors are used in a wide variety of applications in nearly every industry because they are cleaner and less costly to run than fuel-driven motors. They are still able to run at high speeds and efficiently produce mechanical power; however it will maintain much smaller amounts in comparison to larger electrical motors. Little motors or miniature motors are usually used in welding, little centrifuge devices, pitching machines, wheel seats, door openers, pumps, and frozen yogurt machines. Another common usage of small electric motors can be in the auto accessory industry where EP motors are accustomed to power devices such as electric home windows, windscreen wipers, mirrors and locking systems. In some cases, motors can still be categorized as fractional horsepower motors also if the horsepower exceeds one unit. If the body size of the electric motor is a 42, 48, or 56, the one horsepower guideline does not apply. Because of their size, it may sometimes be easier to basically replace a engine than to repair it, but as they are basic contraptions, small electrical motors are reliable devices when used because of their intended purposes.
DC motors such as this are excellent for battery-powered toys (things like model trains, radio-controlled vehicles, or electric razors), nevertheless, you don’t find them in many household appliances. Small appliances (things like coffee grinders or electrical food blenders) tend to use what are called universal motors, which can be run by either AC or DC. Unlike a straightforward DC electric motor, a universal motor has an electromagnet, instead of a long term magnet, and it requires its power from the DC or AC power you feed in:

The small electric motor spins in various directions based on how the battery network marketing leads are hooked up. These motors are usually single stage or three phase depending on required output and intended application. Factors to be made when determining EP motor make use of include: whether a engine will be required for constant or intermittent duty, voltage ratings, desired weight of motor, fan-cooling, adjustable speeds etc. Like all electrical motors, small electrical motors convert electricity into mechanical energy. They modify electric powered energy into rotational movement by using the organic behavior of magnetism, or the attracting and repelling forces of a magnet strong enough to trigger rotation. These small motors are typically low priced and easy maintenance options for motor needs.