Link to purchase the Electrical Calculations Spreadsheet: https://hotm.art/ytd-planilha-calculo... Link to purchase the Load Panel Calculation Spreadsheet: https://hotm.art/ytd-planilha-quadro-... Link to purchase the Electrical Plant Sizing Spreadsheet: https://hotm.art/ytd-planilha-plantas... __________________________________________________ If you like the Eletricity channel and want to contribute to the generation of quality content, then access one of the options below: PIX KEY ???? [email protected] QR CODE ???? https://bit.ly/doacao-pix __________________________________________________ Receive Eletricity content straight to your email! Register using the link below: ???? https://bit.ly/cadastro-eletricity __________________________________________________ Link to download the video material: https://bit.ly/cabo-motor-monofasico __________________________________________________ ???? Check out our content ???? ???? https://linktr.ee/Eletricity __________________________________________________ An induction motor is basically composed of two parts: Stator and Rotor. The space between the stator and the rotor is called the air gap. The stator constitutes the static part and the rotor the moving part. The field generated in the rotor, due to the induced current, has opposite polarity to that of the stator. Thus, the opposition of the fields exerts a torque on the lower and upper part of the rotor, which would tend to rotate it 180° from its original position. Since the torque is the same in both directions, since the forces are exerted by the center of the rotor and in opposite directions, the rotor remains stationary. For this reason, single-phase motors are driven differently than three-phase motors. Let's look at the types of drives: Split-phase method: the motor is wound with two windings, the main and the auxiliary. The auxiliary has a higher resistance than the main one. As a result, the fields are out of phase between the coils and a rotating magnetic field appears, causing the motor to start. It is important to note that the auxiliary winding must be turned off when the motor reaches 85% of its nominal speed. This is usually done using a centrifugal switch that turns off the winding when it reaches this speed. Method with starting capacitor: This also uses an auxiliary winding, but connected in series with a starting capacitor, which makes the delay between the coils greater than in the previous method, increasing the starting torque. Method with starting capacitor and running capacitor: In this method, as in the others, the auxiliary winding is also used, but in this case the auxiliary winding is not turned off. The operation is as follows: when the motor is turned on, the two capacitors are connected in parallel (start and run). When the motor reaches 75% of its nominal speed, the switch turns off the start capacitor, leaving the winding always on and the run capacitor connected with it. Permanent capacitor method: in this case, the auxiliary winding (together with a run capacitor) remains permanently on. This method is mainly used in ceiling fans. Drag coil method: in this method, the motor does not have an auxiliary winding. Two coils are built into the motor stator (in addition to the main one), generally with one or two turns of wire, with a reasonably large thickness. These coils are short-circuited and located in a portion of each pole of the stator. When the motor is energized, the main coil induces a current in these coils, causing them to create a magnetic field out of phase with the main one and start the motor moving. How to perform the test: Step 1 - Knowing that the single-phase motor is made up of 3 internal coils, you will first need a multimeter on the ohm scale to identify these coils. Once identified, they are marked as 1-2, 3-4, 5-6 or 5-8. Step 2 - You will connect two coils in series and apply a voltage of 127V to the ends. Measure the electric current, redo the test by inverting the connection of one of the coils if the current is higher (correct polarity). Mark the input and output numbers of the two coils. Step 3 - With the coils marked, make the connections for the desired voltage 127V or 220V. Turn on the motor and measure the current to see if it is giving the correct value. Also check the noise of the motor to see if it is making a normal noise. 4th Step – Now that everything is marked, the coils are identified and the motor is running, check if the rotation is in the correct direction, if not, just invert the power supply from 5-8 to 8-5. ???? Connect to #electricity ????