electrolux aeg - vacuum cleaner speed regulator not working

Question

Hello, As the aeg vacuum cleaner started to turn off by itself, I decided to fix it. I read that this is a fairly known problem, and the motor disconn...

machefi · Accepted Answer

And everything is clear - a broken chip .

ElectroTom · Answer

The colleague sensor checked?

machefi · Answer

Have you checked what voltage is deposited on the zener diode D1?

SLen · Answer

On the D1 diode, the voltage in the DC range of the multimeter flows in the range of 2.31 � 2.43 [V].
I have not checked the sensor yet (I am in the process of selecting it - it is on the stator winding), but check it by heating it and checking at what temperature it will disconnect?

ElectroTom · Answer

Say what you plug into that white pin socket. I thought it was this sensor - probably a thermistor.

SLen · Answer

I plug in a potentiometer (speed control) into this white socket and it works. And, as I wrote, under the brushes, it is not there, but there is an element on the stator winding and it is rather him.

SLen · Answer

I am so sorry for that :cry:

. Does anyone know what this system is, can it be changed with something?
PS. Where to find the exact model name of this vacuum cleaner? I am asking because I did not find anything in the papers and there is only the inscription "aeg ergoeasy" on the casing, and when I was looking for the entire module, it was the vacuum cleaners that were distinguished by a series of numbers.

ElectroTom · Answer

Maybe insert the soft start system itself for PLN 12. Maybe a regulator on the system. U2008 with soft start.

SLen · Answer

Hello, after a long break.
I decided to create a soft-start circuit board on the U2008B chip, as proposed by ElectroTom, and exactly I followed the diagram from this pdf .
The results of my work:

PS. I know that the board does not knock you down, but this is my beginnings in PCB design. I connect the ground to the electronics with a jumper (yellow line on the PCB).

Unfortunately, when trying with a 40W bulb, there is no adjustment or soft-start. I connect the bulb to points 2 and 3, the voltage from the mains to 1 and 4. Maybe someone has some experience with this system, or he will notice my mistake somewhere. I will be grateful for your help.

PS2. If necessary, I will upload eagle files.

watek · Answer

================================================== ======== The vacuum cleaner motor is damaged, possibly caused by running at reduced speed for too long and an overfilled dust bag. The protection sensor first switched off after exceeding the current of 8A, and after removing this protection, the motor surely failed (short circuit of part of the winding).