The motor may be the heart of any cooler system but it is useless without quality capacitors which keep the motor and the cooler running properly. A motor capacitor such as a start capacitor or run capacitor (including a dual run capacitor) is an electrical capacitor that alters the current to one or more windings of a single phase AC induction motor to create a rotating magnetic field. There are two common types of motor capacitors, run capacitors and start capacitors. The units of capacitance are labeled in microfarads (µF or uF). When your cooler motor do not start easily, this is indication for a capacitor which is either dead or which has lost a lot of its capacitance. There is mainly one test that you can do to check capacitor working or not: Purchase a replacement capacitor and install it. If it starts the motor reliably every single time then you can conclude that the old capacitor was the problem and you have already fixed your water cooler. The Capacitor is the only source which gives initial power to start its motion and again and again boosting will increase the speed. But as the capacitor is not working your cooler motor will not rotate in designed speed. It is right that speed can be managed by regulator but that particular speed will not achieved if capacitor is not working properly. Why Capacitor is Important in Cooler Motor Fans and coolers use induction motors. These motors require a capacitor to run. This is known as a split-phase capacitor. Your fan's motor, by design, requires two phases of current to run. But your home mains offer one phase only. A capacitor splits this phase into two separate phases with a difference of 90 degrees. What is Capacitor A capacitor is an electrical device that stores an electrical charge. They are used on fan motors. They have two electrical ratings. The first rating is the unit's capacitance which is given in microfarads (mfd). This is a measure of the amount of charge the unit can store with a specified voltage applied. The second rating is a voltage rating which tells what supply voltage the unit is rated for. This is usually 370vac or 440vac. This is important to know because if a significantly higher voltage is applied the capacitor will prematurely fail. Testing of Capacitor: If you have analog type meter, the capacitor is checked with the meter set to measure resistance. Shut off the power, discharge the capacitor and disconnect the wires attached to it. Then with the meter on the highest resistance setting, put the leads on the capacitor terminals. The resistance reading should start at zero and go up to maximum. Replacing faulty Capacitor: After your capacitor testing has shown that you have a faulty part, the replacement procedure is simple. If you have a dual run capacitor (the capacitor has three terminals on it), then you should mark the wires and write down where they go. Then simply disconnect the wires, replace the faulty part and then reconnect the wires. If your fan or cooler motor is moving slowly then the best way to increase ceiling fan speed is to change the capacitor. The reason why cooler motor slow as they get older is because the capacitor loses its capacitance. This will lead to lesser torque and speed. You can change the capacitor and restore the rated speed of cooler motor. How to increase Airflow in Cooler or Fan 1) Check its Blade Angle : The best way to check is inspect that all blades align at same angle or not and if not then make it proper. 2) Capacitor is not Working: Replace the capacitor and see the speed of cool motor. It will definitely increase and most of time problems come with capacitor only. 3) Winding Problem: Call the electrician to check the winding of your cooler motor for speed performance. Note : 1) The maximum speed is dictated by the number of poles and the frequency of the line voltage. 2) Single phase induction motor is used in ceiling fans to get a rotating field, it requires capacitors which are not self starting. Ceiling fans and coolers both require induction motors. 3) Rotational speed is a direct function of the power frequency. If you drop the frequency, the motor will slow down. Conversely, if you raise the frequency, the motor will speed up. Consideration: 1) Even though a capacitor is an inexpensive component, installing the wrong size can have a dramatic impact on an entire system. 2) If a wrong capacitor is installed, it will cause an uneven magnetic field around the rotor. This causes the rotor to hesitate at the uneven spots, resulting in irregular rotation, especially under load. This hesitation can cause the motor to become noisy, increase energy consumption, cause performance to drop and the motor to overheat.
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https://www.youtube.com/watch?v=oO0Td0_8Gvc
capacitor and condenser are the same.
Single-phase motors are not self-starting. A condenser spilits the phase to one of the two windings therby the motor sees 'two-phase', which helps it to start.
Capacitor or condenser is a device that is used to store an electric charge. It is basically an arrangement of conductors. Due to its characteristics, a capacitor is widely employed in the formation of electronic circuits. Capacitor stores electrical energy directly, as an electrostatic field is created between two metal "plates". A capacitor is generally constructed using two metal plates or metal foils separated by an insulator known as a dielectric material. Any non-conducting substance can be used as a dielectric material. However, porcelain, mylar, teflon, mica, cellulose are generally preferred. A capacitor is defined by the type of dielectric and electrode material selected. It also defines the application of the capacitor. The dielectric material is the main substance that helps in storing the electrical energy.
