Godrej washing machine capacitor motor

godrej washing machine repair services

The Capacitor in a washing machine motor is mainly designed for operating in the ac power supply. To form a rotating magnetic field in the motor, the capacitor helps in changing the flow of current to single or multiple windings of a single-phase AC induction motor to start rotation.

Commonly, a single-phase ac induction motor includes two windings example main winding and auxiliary winding. The main winding directly gets energy from the power line whereas an auxiliary winding gets energy through a capacitor, so the energy within these two windings of the motor can differ within the phase. Resulting in rotation and generating torque.

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The Capacitor is most commonly used in almost all single-phase motors like compressors, water pumps, fans, oxygen concentrators, freezers, etc. The capacitor is an electronic and electrical device which is used to store electrical energy for the operation of the motor. The capacitor with a higher rating, stores more energy. Capacitors used for starting the motor, are very helpful in building the starting torque of a motor, allowing the motor to run and stop quickly. The capacitors stay connected within the circuit for as long as the motor reaches the fixed speed, which can be 75% of the full speed, and then the capacitor is disconnected from the circuit through a centrifugal switch which operates based on motor speed. The capacitors above 20µF can be non-polarized aluminum electrolytic capacitors and nonsolid electrolyte. These are applicable for the shorter motor starting time. If the centrifugal switch is defective, the motor may not work correctly. The run capacitors are used in single-phase AC motors to strengthen the auxiliary coil so that a rotating magnetic field can be formed when the motor is running. The run capacitors work continuously when the motor is activated. Dual run capacitors are polypropylene film capacitors. Based on application of the capacitor, the rating of the capacitors ranges from 1.5 to 100 µF for different voltages. It is very important to use the correct rating of the capacitor. If the capacitor rating is different from the original, an uneven magnetic field can be formed in the motor resulting in uneven rotation on load. The washing machine motor can be noisy, energy consumption can be higher and the performance drops. Dual run capacitors are also used in motors of a compressor and fan. These capacitors have three terminals.

Advantages of a Capacitor:

• The Capacitors enhance motor performance
• The Capacitors give high efficiency of the motor
• The Capacitor manages the Power factor correction
• The Capacitor helps motor in higher torque
• The Capacitor can operate without maintenance
• The Capacitors are the cheapest energy storage devices
• All heavy-duty applications of induction motors require a capacitor for high starting torque.

There are different methods, to identify if the capacitor is defective. To test a Capacitor to ensure it is working properly or not. The Capacitor is an Electronic and Electrical component that stores energy in the form of an Electric Charge. Capacitors are often used in electronic circuit boards and electrical home appliances to perform a variety of functions. Before we understand to test the capacitor, it is very important to discharge the capacitor.

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Let us understand, how to Discharge Capacitor?

• If the capacitor is connected to the circuit of the PCB, then we should properly de-solder it and disconnect it. Ensure, not to touch the terminals of the capacitor. Now, with an insulated screwdriver, touch both the terminals of the capacitor with the metal part of the screwdriver. You may see a spark and hear some crackling sound as an indication of electric discharge. Repeat this a couple of times to ensure that the capacitor is completely discharged.
• Discharging the capacitor by using a Discharge Resistor which is also called Bleeder Resistor. This is a safe practice to discharge the capacitor. This method is used in power supplies and other similar circuits where a Resistor, known as a Bleeder Resistor, is placed in parallel to the output capacitor so that when the power is turned off, the remaining charge in the capacitor is discharged through this bleed resistor. Take a higher value resistor which can be usually in kilo Ohms, with a high power rating example 5W, and connect it across the terminals of the capacitor. Instead of directly connecting the resistor, you can use wires with crocodile clips on both ends. The capacitor will discharge slowly and you can monitor the voltage across the terminals of the capacitor with a multimeter.
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How to check the washing machine capacitor?

• Method 1 :

One of the easiest, quickest and most accurate methods to test a capacitor is using a Digital Multimeter with a Capacitance Meter feature. Most of the Digital Multimeters include this functionality. The capacitance meter on the digital multimeters often displays the capacitance reading. To check if the Capacitor is working or defective, using a Multimeter, disconnect the Capacitor from the circuit board and discharge it completely, then set the multimeter to Capacitance Setting and connect the capacitor terminals to note the reading. If the capacitor ratings are known and visible on its body, make a note of it. Usually, the capacitance unit is displayed in Farads and micro Farads. It is printed on the body along with the voltage ratings. In the Digital Multimeter, set for capacitance reading, then connect the multimeter probes to the capacitor. If it is a polarized capacitor, connect the red probe to the positive terminal of the capacitor, and the black probe to the negative terminal. If it is non – polarized capacitor, you can connect it either way as they do not have polarity. Now, check the readings on the Digital Multimeter. If the multimeter readings are closer to the actual values as mentioned on the capacitor, then the capacitor can be considered a good capacitor. If the difference between the actual value and the measured reading is significantly large or sometimes zero, then you should replace the capacitor as it is defective.

• Method 2 :

Some of the low-end and cheap Digital Multimeters do not include Capacitance Meters or Capacitance Settings. For Testing a Capacitor using a Multimeter which has no Setting for Capacitance reading, remove the Capacitor from the circuit or board and make sure it is completely discharged. Set the Multimeter to measure resistance, set the knob to Ohm or Resistance reading Settings. If there are multiple ranges of resistance measurement, on a manual multimeter, select a higher range which can be often 20 KΩ to 200 KΩ. You can connect the multimeter probes to the leads of the capacitor as red to positive and black to negative terminals for polarized capacitors. The Digital Multimeter will show a reading of resistance on the display and then the resistance of an open circuit. Make a note of the reading that is displayed initially for a short period. Then disconnect the capacitor from the multimeter and you should repeat the test several times. All test readings, should be, the similar result on the display for a good capacitor. If there is a difference, in the resistance reading in the further tests, the capacitor is dead. This method of testing the capacitor is not accurate. It can differentiate between good and bad capacitors. Then, this method doesn’t give the capacitance of the capacitor.

Refer to below price list of some washing machine capacitors:

• doctorspare Capacitor for Washing Machine, 9.5+4 mfd Capacitor for wash and Spin Motor – Rs 296
• doctorspare Capacitor for Washing Machine, 10+5 MFD Capacitor for Wash and Spin Motor – Rs 289
• Arvika Sales Capacitor Suitable for Whirlpool Top Load Washing Machine Motor Capacitor with Inductor Coil 10 MFD – Rs 520
• Pmw - Capacitor for Washing Machine - 9.5+4 mfd Capacitor for Wash & Spin Motor - 1 Capacitor –Rs 349
• Pmw - Capacitor for Washing Machine - 9.5+4 mfd Capacitor for Wash & Spin Motor - 1 Capacitor – Rs 249
• Pmw - Capacitor for Washing Machine - 9.5+4 mfd Capacitor for Wash & Spin Motor - 1 Capacitor – Rs 239
• VT - Emdo 10/4 MFD Capacitor for Washing Machine 440Volt (Off White, Pack of 1) – Rs 310
• Pmw - Capacitor for Washing Machine - 9.5+4 mfd Capacitor for Wash & Spin Motor - 1 Capacitor – Rs 349
• AMAZOR Capacitor for Washing Machine, 9+6 mfd Capacitor for wash and Spin Motor – Rs 249
• spareplanet Capacitor 10+5 mfd Compatible with Semi Automatic Washing Machine (Match & Buy) – Rs 449

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