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Not able to recognise this motor type

This is a table fan motor. The circuit is not working so I need to find a new one to start this again.
But I fail to get any online. Please help me to understand what I need to start this fan.

The fan has three wire: 1 - VDD 2- GND 3- PWM

Please find the attachments
8E4735CA-8D38-41F8-B9AE-20379CD90193.JPG
C9529302-38BF-4CC0-AA40-B35E5BBEB635.JPG
834A7088-C4FF-4D9F-9EE2-97AEB675611E.JPG
for your reference.
140DB228-15D5-49BB-B4D2-C9D4261A4C25.JPG
60A1609E-6EFF-4454-9A86-1DC3347393C8.JPG
 

Les Jones

Well-Known Member
Most Helpful Member
Have you checked the battery voltage ? Checking that there is power available is always a good place to start.

Les.
 

Les Jones

Well-Known Member
Most Helpful Member
You have not commented on the bare wire that Musicmanager pointed out in post #5 This could be that problem but without knowing what it is connected to we can't comment about it.
Do the LEDs light up ?
Measure the voltage between the ground and VDD2 wires going to the motor.
Check if the duty cycle of the PWM waveform to the motor changes when the speed control is adjusted. (You will need an oscilloscope to do that test.)

Les.
 
You should have a DC voltage on Vdd (presumably 24V?, and PWM pulses on PWM - do you have both of those?.
You have not commented on the bare wire that Musicmanager pointed out in post #5 This could be that problem but without knowing what it is connected to we can't comment about it.
Do the LEDs light up ?
Measure the voltage between the ground and VDD2 wires going to the motor.
Check if the duty cycle of the PWM waveform to the motor changes when the speed control is adjusted. (You will need an oscilloscope to do that test.)

Les.
That goes to the battery for charging and getting power while there is no electricity. Led indicates battery charge. one LED 10% two LED 20% so on. No power at all in VDD2. Power adoptor working fine - showing 23-24v DC
 
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Les Jones

Well-Known Member
Most Helpful Member
Tell is what the wires from CON 2 and Con 3 connect to. Post a picture of the etch side of the circuit board and draw a block diagram of the interconnections between all the parts of the fan unit. (The motor, the circuit board in your pictures, the battery, the power input and any other items that are inside the fan unit.)

Les.
 

MaxHeadRoom78

Well-Known Member
Most Helpful Member
The company that made the fan appear to also specialize in portable fans where AC power is not available.
It is looking like it is a form of ECM (Electronically comutated motor), if so could have internal electronics that receives the PWM
 
Last edited:
Tell is what the wires from CON 2 and Con 3 connect to. Post a picture of the etch side of the circuit board and draw a block diagram of the interconnections between all the parts of the fan unit. (The motor, the circuit board in your pictures, the battery, the power input and any other items that are inside the fan unit.)

Les.

Artboard.jpg


834A7088-C4FF-4D9F-9EE2-97AEB675611E 2.JPG
 

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