Summary:Single phase motors are used in a variety of appliances. They are often used in refrigerators and freezers. They are usu...
Single phase motors are used in a variety of appliances. They are often used in refrigerators and freezers. They are usually a little less expensive than other types of motors. They also require lower horsepower. This makes them a good choice for smaller machines. However, they will eventually need to be replaced. Choosing the right motor for your application requires a bit of understanding of the differences in power supply.
Single phase motors can run on connections of up to 440V. In addition to this, they use alternating current instead of direct current. This produces a magnetic field on the rotor, which generates electricity. They require a starting circuit. A capacitor is typically connected in series with the start winding. The resulting current will cause the rotor to rotate.
The rotor will then produce torque as it rotates. This torque will decrease as the motor accelerates. It will develop a maximum torque at around 10% slip. This is called a torque ripple. It is usually expressed as a percentage of the output torque.
Induction principles are involved, and each component in the motor has a magnetic field. Each field has a different magnitude. The combined magnitude of the fields is half that of the alternating field. The magnetic field produced by the rotor interacts with the main field. The combination of these two field strengths produces a revolving magnetic field, which causes the rotor to rotate. The rotor and the revolving magnetic field interact to produce a force, called 'F'.
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