Not able to recognise this motor type

[ganeshgovalkar]

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

for your reference.

 

[Nigel Goodwin]

As it says 24V DC on the label, presumably it's either a DC brushed, or brushless, motor?.

 

[Pommie]

Why is there a USB connector?

Mike.

 

[ganeshgovalkar]

You can charge phone using this. This is a rechargeable fan.

 

[Musicmanager]

This might have something to do with it ??

MM

 

[Pommie]

You can charge phone using this. This is a rechargeable fan.

Is the fan rechargeable and contains batteries or can you use the fan to charge other things? Looks like type A socket so I'm guessing the later.

Mike.

 

[ganeshgovalkar]

The fan is rechargeable and contains batteries.

 

[Les Jones]

Have you checked the battery voltage ? Checking that there is power available is always a good place to start.

Les.

 

[ganeshgovalkar]

Yes, I have used a multimeter to check that. battery is ok.

 

[MaxHeadRoom78]

The coils seen through the bell housing appear to indicate a BLDC motor, the PC board appears to show it is PWM controlled.

 

[ganeshgovalkar]

so what to do?

 

[Les Jones]

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.

 

[Nigel Goodwin]

You should have a DC voltage on Vdd (presumably 24V?, and PWM pulses on PWM - do you have both of those?.

 

[ganeshgovalkar]

The coils seen through the bell housing appear to indicate a BLDC motor, the PC board appears to show it is PWM controlled.

It has 3wires

 

[ganeshgovalkar]

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

 

[ganeshgovalkar]

Please suggest me to start this fan ..... I'm ok with no speed and battery backup

 

[Les Jones]

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]

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

 

[ganeshgovalkar]

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.

 

[ganeshgovalkar]