Application of single phase induction motor dating with the telegraph newspaper
Similarly, it will continue rotating counter-clockwise if the initial rotation was counter-clockwise.
These motors are not practical due to their inability to reliably start rotation on their own.
Choosing a wrong capacitance value for a motor can result in an uneven magnetic field, which can be observed as uneven motor rotation speed, especially under load.
This can cause additional noise from the motor, performance drops and increased energy consumption, as well as additional heating, which can cause the motor to overheat.
Some single phase AC motor designs use motor run capacitors, which are left connected to the auxiliary coil even after the start capacitor is disconnected by the centrifugal switch.
These designs operate by creating a rotating magnetic field.
They come in various voltage ratings, depending on the application they were intended for.The video below shows an easy to understand explanation of the working principle of the AC induction motor.AC induction motors usually use two or more coils to generate a rotating magnetic field, which produces torque on the rotor.The DC Motors speed can be controlled by varying the supply voltage and are available in a wide range of voltages, however the most popular type are 12 & 24V, with some of the advantages being: DC motors are widely used and can be used from small tools and appliances, through to electric vehicles, lifts & hoists Click here for an example of DC Motors from RS The two common types are: Brushed These are the more traditional type of motor and are typically used in cost-sensitive applications, where the control system is relatively simple, such as in consumer applications and more basic industrial equipment, these type of motors can be broken down as: Brushless Brushless motors alleviate some of the issues associated with the more common brushed motors (short life span for high use applications) and are mechanically much simpler in design (not having brushes).The motor controller uses Hall Effect sensors to detect the rotors position and using this the controller can accurately control the motor via current in the rotor coils) to regulate the speed.
One way to improve on the single coil design is by using an auxiliary coil in series with a motor starting capacitor.