COMO IDENTIFICAR CABOS SEM MARCAÇÃO NO MOTOR MONOFÁSICO.

🎁 Products we recommend: 🔗 https://meli.la/2njVbpU __________________________________________________ Automate your electrical calculations with our spreadsheets: Link to purchase the Electrical Calculation Spreadsheet: https://hotm.art/ytd-planilha-calculo... Link to purchase the Load Schedule 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 content from Eletricity directly in your email! Register through 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 the opposite polarity to that of the stator. Thus, the opposing fields exert a torque on the lower and upper parts of the rotor, which would tend to rotate it 180° from its original position. Since the torque is equal in both directions, as the forces are exerted by the center of the rotor and in opposite directions, the rotor remains stationary. For this reason, single-phase motors have a different drive system 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 winding has a higher resistance than the main winding, so the fields are out of phase between the coils, creating a rotating magnetic field that starts the motor. It is important to note that the auxiliary winding must be disconnected when the motor reaches 85% of its nominal speed. This is usually done through a centrifugal-contact switch that disconnects the winding when this speed is reached. Starting capacitor method: This method also uses an auxiliary winding, but connected in series with a starting capacitor. This results in a greater delay between the coils than in the previous method, increasing the starting torque. Starting capacitor and running capacitor method: In this method, as in the others, the auxiliary winding is also used, but in this case, the auxiliary winding is not disconnected. The operation is as follows: when the motor is started, the two capacitors are connected in parallel (starting and running). When the motor reaches 75% of its nominal speed, the switch disconnects the starting capacitor, leaving the winding always connected along with the running capacitor. Permanent capacitor method: In this case, the auxiliary winding (along with a running capacitor) remains permanently connected. This method is mainly used in ceiling fans. Driving coil method: In this method, the motor does not have an auxiliary winding. Two coils (in addition to the main one) are built into the motor stator, usually with one or two turns of wire of a reasonably large thickness. These coils are short-circuited and are located on a portion of each stator pole. 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 coil and initiating the motor's movement. How to test it: 1st Step - Knowing that the single-phase motor is composed of 3 internal coils, you first need a multimeter in ohms mode to identify these coils. After identification, they are marked as 1-2, 3-4, 5-6, or 5-8. 2nd Step – You will connect two coils in series and apply a voltage of 127V to the ends. Measure the electrical current. Repeat the test by reversing the connection of one of the coils if the current is higher (correct polarity). Mark the input and output numbers of both 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 motor noise to see if it has a normal sound level. Step 4 – 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, simply reverse the power supply from 5-8 to 8-5. 💡 Pay attention to #electricity 💡