Hello,
I am struggling to figure thhis thhing out. I got some parts off a washing machine a year ago or so. Now I had some time and wanted to test out the motor and figure out if I could do something with it.
The motor, however, requires AC power at 195V 310Hz, which seems unusual. I suspect this power might be converted in the other part I got, a circuit board called 41017051 or mdld00110200 .
I would test it to figure out if that is the case, but I don't know where to connect regular 230V AC on it. I can't find a schematic or a picture of how it should be wired.
If anyone has any ideas let me know, I don't know how to power this thing otherwise...
How many wires are there? Are there some heavy and some light wires (gauge not color). I am thinking this likely has some sort of feedback sensor (light wires).
I'm also curious what function this motor might have where the motor speed could be 17,500 RPM.
Also, perhaps the PN on some of the board IC's might provide a clue.
UPDATE: I have found something by looking up part names. The big flat thing near the giant cap is a IRAMS10UP60B and it turns out it is a motor driver. I have found a datasheet for it I THINK I might know which ones are the pins that I am supposed to connect to the motor.
I still have a problem, however, with the fact that I do not know where I should connect power to the board to make it work. I need to figure it out, and I'm not sure how...
The motor has 6 wires in total. 3 go into the motor itself; two are thinner and go to the back, some research showed they are connected to a speed sensor to know the speed of the motor; there is then one last wire that just bolts to the external frame of the motor.
I wouldn't know if the washing machine had schematics in it. A relative was going to throw it away and I just got permission to quickly take out a couple parts in case I could reuse them in the future, which would be now if I figured out how to power it.
That board probably runs at live mains potential, note, without any isolation. It seems to have a DC rail
(the big electrolytic cap suggests that), and the motor is likely a 3-phase induction motor.
The motor, however, requires AC power at 195V 310Hz, which seems unusual
Normal for a high power density 3-phase induction motor. Power is proportional to
motor volume times motor rpm. More rpm means a smaller motor, means cheaper hardware.
The 195V is less than the mains rms due to the various drops in voltage in the power supply and
overheads for the PWM power conversion.
Washing machine motors have been gradually changing over the years from universal motors
(cheap, high power, but brushes wear out and fail), via direct drive (basically a large
expensive brushless motor), to 3-phase induction (cheapest to make, most reliable, but requires
more intelligence to drive, using FOC or similar, so that both high torque and high speed are
available - a VFD probably wouldn't hack it for this application).
JohnRob:
I'm also curious what function this motor might have where the motor speed could be 17,500 RPM.
Spindry speed.
Washing machines have two different modes, agitation (slow back and forth drum rotations), and
spin-dry cycle (as fast as possible!). Very high torque is needed for the former, high speed for
the later. Field-weakening is essential to the latter I suspect, so that the low speed torque isn't
compromized.
bvcderrttyyhjjjk:
I wouldn't know if the washing machine had schematics in it. A relative was going to throw it away and I just got permission to quickly take out a couple parts in case I could reuse them in the future, which would be now if I figured out how to power it.
Sorry, lost the game there!
Either you have the whole machine and in particular, the wiring harness and control board, or you have scrap metal.
I know this is not an optimal situation, but the motor did work when I got it, so assuming I am able to provide the 195V 310Hz the motor should run. There are tutorials pretty much everywhere showing how to test washing machine motors, my problem right now is that odd power requirement.
I have some additional thoughts: the big IC is definitely supposed to have 3 of its pins connected to the 3 wires that drive the motor.
Now this is just my educated guess... the only other 2 parts that were in the machine were a big capacitor ( F55.100/987-451 ) and an inductor.
I showed these to an electrical engineer who said that these components are used to smooth out power. I remember these being connected in between the driver/logic board and the motor.
So I think the 195V 310Hz is made on that board, and then smoothed out for the motor.
Now, what I can't quite understand is if the IRAMS10UP60B is responsible for that power conversion itself... it was screwed onto a big metal shroud, which I assume may be for heat dissipation purposes... so could that be it?
I just need to generate that 195V 310Hz. I don't really care about the other functions of the board.
I would think the mains comes in on some of the fastons in the lower right hand corner. I also would think it goes through the fuse and to the AC inputs of what appears to be a bridge rectifier. At least it's a place to start.
I know it is an old thread, but I need help soon. Also I will wrote a PM message to the starter member of this topic.
So, I need help to identificate two SMD capacitors. I have the same mainboard (code: 41017051) from a Hoover washing machine (model VHD 9163 ZD-86S, no. 31001851).
Story: Because of a bad shock absorbers, the drum of my washing machine fell off and hit the mainboard. Besides the broken connector (but repairable - only 3 wires is used and I will solder them directly to the mainbord) the drum also hit two SMD capacitors beyond recognition (remaining only the places where they was). I can't find anywhere the electronic diagram of this mainboard to replace them with one's with the same values.
If anyone could help me to find the values of those SMD capacitors, I will remain grateful.
I attached pictures to point to the place where was those SMD capacitors on my mainboard.
Thank you in advance!
Laurentiu
Romania, Bucharest
If you've got a friendly local repair guy, or can find smeone with the same machine who will take it apart and take photos, then try searching for the model number on line. There are suppliers of all the parts and diagrams, and you just may be able to glean enough info from on-line photos, etc. These folk 'promote a repair culture' Hoover Washing Machine Programmed Three-Phase Control Board - Part Number 49019084 for vhd9163zd-86s (31001851) but probably not to the level you need. The damage on the board looks to be mainly to the edge connectors, looking at what it connects to may give a clue as to the repair needed, If you have the broken parts, you may be able to fit them together to see what tracks you need to fabricate. But, you have bearings and shock absorbers to replace, possibly the rubber door gasket, and so on, and most likely in a few weeks time, something else will fail. If you can get four or five years out of a domestic washing machine you're lucky, these days. I've enlarged the op's photo, and it does look as if it is two capacitors (based on the colour and lack of markings) If all else fails, try and see where they are in the circuit - i.e. check if any of the pads are to ground. If you find that is so, then find a similar located capacitor (i.e. to ground) and use the same value. If/when you try to fix this, let us know the colour of the resulting smoke
MarkT:
What makes you think they are capacitors and not resistors? There's nothing left!
Hello Mark,
Initiator of this thread put a picture of the PCB and is clearer that the two missing SMD's is in fact capacitors. Also I have one or two other hi-res pictures from the web with the same PCB (still in one piece!) But, still I don't have hi-res pictures of the back of the PCB...
