220V AC Induction Motor 1100-1200RPM Used For Spin Dryer KG-7812M22

AC Induction Motor 220V 1100-1200RPM Used For Spin Dryer KG-7812M22

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Essential Details

Class of insulation: CLASS B

Warranty: 3 Years

Model Number: KG-7812M22

Rated Voltage: 220V

Rated Speed: 1100-1200RPM

Rated Power: 61-64W

Continuous Current: Customizable

Place of Origin: Guangdong, China

Type: AC Induction Motor

Application: Spin Dryer

Rated Torque: Customizable

Drawing

Sample

What Controls The Speed Of An AC Motor?

In synchronous AC motors, the rotor turns at exactly the same speed as the rotating magnetic field; in an induction motor, the rotor always turns at a lower speed than the field, making it an example of what's called an asynchronous AC motor. The theoretical speed of the rotor in an induction motor depends on the frequency of the AC supply and the number of coils that make up the stator and, with no load on the motor, comes close to the speed of the rotating magnetic field.

In practice, the load on the motor (whatever it's driving) also plays a part—tending to slow the rotor down. The greater the load, the greater the "slip" between the speed of the rotating magnetic field and the actual speed of the rotor. To control the speed of an AC motor (make it go faster or slower), you have to increase or decrease the frequency of the AC supply using what's called a variable-frequency drive. So when you adjust the speed of something like a factory machine, powered by an AC induction motor, you're really controlling a circuit that's turning the frequency of the current that drives the motor either up or down.

What's The "Phase" Of An AC Motor?

We don't necessarily have to drive the rotor with four coils (two opposing pairs), as illustrated here. It's possible to build induction motors with all kinds of other arrangements of coils. The more coils you have, the more smoothly the motor will run. The number of separate electric currents energizing the coils independently, out of step, is known as the phase of the motor, so the design shown above is a two-phase motor (with two currents energizing four coils that operate out of step in two pairs). In a three-phase motor, we could have three coils arranged around the stator in a triangle, six evenly spaced coils (three pairs), or even 12 coils (three sets of four coils), with either one, two, or four coils switched on and off together by three separate, out-of-phase currents.