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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Burning smell, sparks and noise from Miele vacuum cleaner motor
The only electronics (on a face plate) attached to the motor are a ST
electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Just curious whether the failure of either of these could be causing the motor failure symptoms in the subject line, |
#2
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Burning smell, sparks and noise from Miele vacuum cleaner motor
At about the time of 10/2/2008 1:20 AM, Graz stated the following:
The only electronics (on a face plate) attached to the motor are a ST electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Just curious whether the failure of either of these could be causing the motor failure symptoms in the subject line, That 43-02 sounds like a motor running capacitor...43uf maybe? The 97C means that it will function correctly up to 97 degrees Celsius. A failure of the cap will cause problems. The chip mentioned is not a IC per say, but it's a triac. http://www.datasheetcatalog.org/data...onics/7471.pdf is the datasheet on it. It sounds like the motor is a standard induction motor with a 90 degree phase controlled startup winding. -- Daniel Rudy Email address has been base64 encoded to reduce spam Decode email address using b64decode or uudecode -m |
#3
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Burning smell, sparks and noise from Miele vacuum cleaner motor
On Thu, 02 Oct 2008 03:59:45 -0700, Daniel Rudy
wrote: At about the time of 10/2/2008 1:20 AM, Graz stated the following: The only electronics (on a face plate) attached to the motor are a ST electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Just curious whether the failure of either of these could be causing the motor failure symptoms in the subject line, That 43-02 sounds like a motor running capacitor...43uf maybe? The 97C means that it will function correctly up to 97 degrees Celsius. A failure of the cap will cause problems. OK, thanks. I will try to measure the ESR on it. What sort of problems could failure cause? The chip mentioned is not a IC per say, but it's a triac. http://www.datasheetcatalog.org/data...onics/7471.pdf is the datasheet on it. It sounds like the motor is a standard induction motor with a 90 degree phase controlled startup winding. Apparently it's also brushless. And not amenable to dissasembly. |
#4
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Burning smell, sparks and noise from Miele vacuum cleaner motor
At about the time of 10/2/2008 4:11 AM, Graz stated the following:
On Thu, 02 Oct 2008 03:59:45 -0700, Daniel Rudy wrote: At about the time of 10/2/2008 1:20 AM, Graz stated the following: The only electronics (on a face plate) attached to the motor are a ST electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Just curious whether the failure of either of these could be causing the motor failure symptoms in the subject line, That 43-02 sounds like a motor running capacitor...43uf maybe? The 97C means that it will function correctly up to 97 degrees Celsius. A failure of the cap will cause problems. OK, thanks. I will try to measure the ESR on it. What sort of problems could failure cause? Failure to start or trouble starting. I'm willing to bet the triac is out. Personally, I would replace both. With that being a motor cap, you may want to get something in the 250-480v range. The chip mentioned is not a IC per say, but it's a triac. http://www.datasheetcatalog.org/data...onics/7471.pdf is the datasheet on it. It sounds like the motor is a standard induction motor with a 90 degree phase controlled startup winding. Apparently it's also brushless. And not amenable to dissasembly. Induction motors are brushless, and you can take them apart. I've done it quite a few times. The stator is just the windings. The rotor is quite simple, basically just a bunch of steel laminates inside an aluminum cage. You have bearings on both ends. There isn't much to them. The only ways that an induction motor can fail is either a winding opens or shorts (which rarely happens), or the bearings go out (more common), and that's it. It's kinda unusual to see a low horsepower induction motor have a separate starting circuit, even if it is single phase. Here's some theory if you are interested. http://www.reliance.com/mtr/mtrthrmn.htm -- Daniel Rudy Email address has been base64 encoded to reduce spam Decode email address using b64decode or uudecode -m |
#5
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Burning smell, sparks and noise from Miele vacuum cleaner motor
On Thu, 02 Oct 2008 05:34:47 -0700, Daniel Rudy
wrote: At about the time of 10/2/2008 4:11 AM, Graz stated the following: On Thu, 02 Oct 2008 03:59:45 -0700, Daniel Rudy wrote: At about the time of 10/2/2008 1:20 AM, Graz stated the following: The only electronics (on a face plate) attached to the motor are a ST electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Just curious whether the failure of either of these could be causing the motor failure symptoms in the subject line, That 43-02 sounds like a motor running capacitor...43uf maybe? The 97C means that it will function correctly up to 97 degrees Celsius. A failure of the cap will cause problems. OK, thanks. I will try to measure the ESR on it. What sort of problems could failure cause? Failure to start or trouble starting. It starts fine, just sparks quite a bit, is noisy, and there's an electrical burning smell (from the sparks, presumably) I'm willing to bet the triac is out. Personally, I would replace both. With that being a motor cap, you may want to get something in the 250-480v range. The cap checks out OK. It won't cost me much to replace the triac so it's worth a shot. I can get hold of a BTA16-600BW (locally) easily enough, but the BTB16-600BW will be more difficult. According to the data sheet, the only difference between them is that the "A" is insulated and the "B" is not, so I imagine I could use the "A"? The chip mentioned is not a IC per say, but it's a triac. http://www.datasheetcatalog.org/data...onics/7471.pdf is the datasheet on it. It sounds like the motor is a standard induction motor with a 90 degree phase controlled startup winding. Apparently it's also brushless. And not amenable to dissasembly. Induction motors are brushless, and you can take them apart. I've done it quite a few times. The stator is just the windings. The rotor is quite simple, basically just a bunch of steel laminates inside an aluminum cage. You have bearings on both ends. There isn't much to them. The only ways that an induction motor can fail is either a winding opens or shorts (which rarely happens), or the bearings go out (more common), and that's it. It's kinda unusual to see a low horsepower induction motor have a separate starting circuit, even if it is single phase. It just seemed odd to me that the actual motor on a vacuum cleaner less than 6 years old would pack up. Especially one made by Miele, which prides itself on the quality of its products. Here's some theory if you are interested. http://www.reliance.com/mtr/mtrthrmn.htm Thanks for that, bookmarked. All your help much appreciated. |
#6
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Burning smell, sparks and noise from Miele vacuum cleaner motor
On Thu, 02 Oct 2008 08:20:22 GMT, (Graz) put finger to
keyboard and composed: The only electronics (on a face plate) attached to the motor are a ST electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Are you describing a thermal fuse or thermal cutout? http://images.asia.ru/img/alibaba/ph...ermal_fuse.jpg http://www.applianceblog.com/archives/ThermalCutout.jpg http://www.appliancepartsworldwide.c...5304408936.jpg Just curious whether the failure of either of these could be causing the motor failure symptoms in the subject line, - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#7
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Burning smell, sparks and noise from Miele vacuum cleaner motor
On Fri, 03 Oct 2008 06:30:54 +1000, Franc Zabkar
wrote: On Thu, 02 Oct 2008 08:20:22 GMT, (Graz) put finger to keyboard and composed: The only electronics (on a face plate) attached to the motor are a ST electronics BTB16 600BW chip (used for phase control in motor speed controllers) and an unidentified cylindrical component marked only as "43-02 97C". Are you describing a thermal fuse or thermal cutout? http://images.asia.ru/img/alibaba/ph...ermal_fuse.jpg http://www.applianceblog.com/archives/ThermalCutout.jpg http://www.appliancepartsworldwide.c...5304408936.jpg No, it looks like none of those. I believe it is a cap as Daniel suggested. |
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