Washing Machine Motor Burnout and Controller Teardown
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- Опубліковано 15 тра 2023
- I lost my washing machine to the flooding of the basement. I wanted to indulge in the famous Photonicinduction experiment of throwing a large rock into a running washing machine and let it dance for the internet to enjoy. It did not exactly go like that. This Electrolux washing machine is going to smoke. Its Bitron motor controller is no longer enough.
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#electronicscreators #teardown - Наука та технологія
You let the angry pixies out of the motor 🤣
These only seemed to be mildly irritated, not so angry :D
i feel brush motor much better because of the sound they make
!
At first sight you would think these are more reliable than the old brushed motor version. But carbon brushes are dirt cheap and easy to replace. I have seen a lot of these with a burned out VFD IC. They are sensitive to spikes in the mains and the VFD board is very expensive to replace. The only real advantage is that the washing machine makes less noise with the brushless motor. They dont make that typical "whine" when spinning. There is another version of this where the motor directly drives the drum, without a belt.
Yay destruction of stuff that is broken already. Wohoo!
Did you see my exploding smart phones in the pulse power playlist? ;)
@@KaizerPowerElectronicsDk Nope, I think I need to watch those :) Thanks for the hint!
that's a delightful little motor control. i wish they made general-purpose chassis-mount drives that small. for retrofitting fans and such.
let us know if you ever dive deeper into the power stage of that drive! from the shape/pinout of it it looks like that IC is either a Fuji or Mitsubishi IPM. if it's an IPM that would explain the relative simplicity of the surrounding circuitry
This channel might be needing a carpet and pint sized beer cans 💥
I see what you did there!
Fairly impressive board for an appliance. In US models, you'll still see cardboard protectors, thru-hole, and wave soldering rejects. Also on US models, the plastic drum housing is incredibly flammable. If you still have a piece of the thing, take a lighter to it and step back. Nothing wrong with smoke on an electronics channel 😄
I got a really big smoking thing for later...
Something doesn't add up.
The type plate indicate:
195 V @ 310 Hz = 0.629V/Hz
And 36 V @ 10 Hz = 3.6V/Hz
If it was same coil set the wash coil wood receive 1116 V or the spin coil wood receive 6,2 V when washing
It must bee with 2 set of coils.
But a smoking good video 😊
There is only 6 wires from the windings, connected into 3 wires to the controller. I am guessing that the drive must have used pulses. A washing machine also accelerates in multiply steps. Maybe its just taking its time to get the load of evenly distributed wet clothes to top speed and only put enough energy into the "fly wheel" to keep it at a certain RPM. Good balance and low friction bearings = smaller motor...
I'd loved to see how fast it would spin with more than 300Hz!
I got another motor that I would like to spin fast, too fast. In the area of dangerous, as the rotating blades are made of metal. I hope I have more luck with the VFD driving that.
Maybe not what you intended but still an interesting video. I have always wondered what would be used in a washing machine where the drum can spin very slowly but also at 1200 rpm (spin drying). Never realized that an AC motor with a VFD would be the obvious choice for that.
It's not how it's usually done, especially in the past.
Very old high-end machines may have a dual motor on a single shaft: One Asynchronous motor for high torque and one series-wound brushed motor for high speed, switched in and reversed via relays.
Old to current machines use a brushed motor with separate rotor and field windings that get swithed using triacs. Switching them in parallel gives high torque, while switching them in series allows high speeds.
you probably need to set "frequency at full voltage" or base frequency to 310hz in the VFD, its seperate from the "speed" frequency you can adjust. i almost smoked my cnc spindle because it wanted 400hz but i had it set to 50 on the vfd...
I went over the VFD manual again and it does not have that advanced options. Its only motor specifications and min/max speeds. I could properly have started it at 300 Hz, but that would have sent it flying around :D
@@KaizerPowerElectronicsDk just looked into the manual, its option P081
@@gamerpaddy "P081 Nominal rating plate frequency for motor (Hz) 0 - 650.00 [50.00]". Here I went with 50 Hz, as what is nominal for a motor with a 10-300 Hz rating :) But its too late to try that out by now :o
I dont know how you had your VFD set up but the motor would need lower voltage at lower frequencies due to the coil reactance/impedance
That was not an option for my old VFD, but I first realized this while editing the video :)
@@KaizerPowerElectronicsDk 👍 I would expect that if the VFD has a current setting it would adjust the voltage to stay within the current setting 🤔 or maybe it just cuts out in over current idk mate as I've never had that model VFD.. I know you know about reactance/impedance but we all have brain farts at times 😅 its because you were using a VFD you just expect it to work, if you had built a driver yourself you would have thought of the coil reactance/impedance etc 👍👍
@@KaizerPowerElectronicsDk it would have been nice if you had chance to scope the inputs before the damage/disassembly, would have be cool to be able to run the original inverter, I was surprised how small it was, was you? interesting to see though, when I saw the thumbnail on my phone I thought it was one of those direct drive drums.. was there anything worth keeping from the machine?
@@T2D.SteveArcs Inverter was indeed smaller than expected. Not much worth keeping, as everything is made so cheap that not even bolts and buts are used, but self-tapping screws and rivets. The motor is riveted together. Its almost impossible to take something apart, because it was never made to be serviced (except exchanging whole parts). The driver IC being soldered through the plastic shows this clearly.
@@KaizerPowerElectronicsDk yeah they are definitely built down to a price, self tapper's and rivets 😅🤦🏻♂️"throw away society" 🤷♂️ we had a tumble dryer, it was around 2 years old and it started squeaking as the drum turned, I took it apart expecting a bad bearing, nope they had used a bronze oil impregnated bushing as the main drum rear bearing and it had worn right through to the pressed steel sheet "mount" I've seen better in printers , oh and the motor had a drive belt that went from the motor pulley round the actual drum 😅