Introduction:
It is very important for the technician doing the work of repairing and rewinding a ceiling fan to know the correct winding data. Ceiling fan is there in every house, today we will talk about 8+8 slot ceiling fan winding data, the stator of 36" ceiling fan is 8+8, it usually has coils, in which you get the complete details of running coil and starting coil, winding guidelines, number of turns, wire gauge, total coil weight, pitch and step-by-step guide of winding process.
Let's get started
What is ceiling fan winding?
Ceiling fan winding means putting wire coils inside the stator core of the fan. These coils generate a magnetic field from electricity, which rotates the rotor, and the fan moves, there are two types of coils in a fan:
Running coil (main coil)
Starting coil (auxiliary coil)
8+8 slot ceiling fan winding data
8+8 slot means the fan stator has a total of 16 slots - 8 slots for running coil and 8 slots for starting coil. One stator core 8+8 slots Mostly seen 36" ceiling fan stator core, 36" ceiling fan main core or stator, this design is mostly used in single-phase ceiling fan motors. 220v - 250v AC 50Hz.
1. Running Coil Winding Details
- Wire Gauge (SWG): 35 SWG (or can be 34 or 36 SWG as per motor rating)
- Today we will tell about 35 SWG copper wire.
- Number of Turns: 470 to 480 turns per coil
- Coil Pitch: 1-4 (Slot Gap 2)
- Total Number of Coils: 8
- Total Turns (approx): 8 coils x 480 turns = 3840 turns
- Connection Type: Series Connection
- Direction: Clockwise or Anticlockwise (as per slot alignment)
2. Starting Coil Winding Description
- Wire Gauge (SWG): 35 SWG (or can be 34 or 36 SWG depending upon motor rating as it has shorter life) We will tell you about 35 SWG copper wire.
- Number of Turns: 450 to 460 turns per coil
- Coil Pitch: 1-4 (Slot Gap 2)
- Total Number of Coils: 8
- Total Turns (approx): 8 coils x 450 turns = 3600 turns
- Connection Type: Series with Capacitor
- Direction: Opposite to Running Coil
What is the total coil weight?
- Running Coil Weight: Approx 150 -140 grams (depending on gauge and fan size)
- Starting Coil Weight: Approx 120 - 110 grams
- Total Copper Weight: Approx 300 - 240 grams
(Note: These values may vary slightly depending upon fan brand and model) (Note that the winding voltage may increase/decrease)
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How to do ceiling fan coil winding?
(Step-by-step guide)
1. Removing old winding: First remove the old coil carefully.
2. Stator slot clean: Clean the slots from carbon, varnish and dust, completely clean the slots with a brush and try to make them look like new.
3. Applying insulation paper: It is necessary to apply insulation paper in every slot. 7 number film paper will be applied.
4. Making coil: Make coil with winding machine or by hand - take care of accurate turns, and start.
5. Installing coil: Fit all the coils in the slots in proper alignment.
7. Applying insulation tape: If the wire gets cut somewhere while winding, do not forget to apply insulation tape on the joint area.
8. Testing: Check continuity of 2 or 2 = 4 wires of running coil and starting coil with multimeter.
7. Resistance difference: Starting coil has higher resistance than the running coil.
9. Varnish and baking: Varnish after winding is complete, heat the coil after final varnishing (60-80°C)
Important Tips:
- Capacitor Rating: 2.25 to 2.50 uF MFD.
- Fan Speed:
- Supply Voltage: 220 to 250 V AC 50 Hz
- Always wind in the same direction.
- Keep the coil pitch and turns same - otherwise the fan will heat up.
- Use color coding in running and starting coil for easy identification.
- It is very important to use the correct swag wire otherwise the fan winding may burn.
- Varnishing is a must, do not skip it.