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Thread Number: 33216
Differences in Hotpoint Motor Controllers |
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| Post# 500321 , Reply# 1 3/1/2011 at 11:59 (4,797 days old) by hotpoint95622 (Powys) | ||
hotpoint 95622
I’ve just acquired some service manuals for the 1851/03 which also covers earlier models 1850 1851 and 1828/01 ranging from 1973 up to 1977 the modulus are analogue and the motor voltage is controlled by a thyristor (SCR) which rectifies AC to form DC power which makes the motor sound different to any other.
I also acquired the service manuals for the 18680 18580 18380 1828/07 and many more from 1976 up to 1983 we are still using analogue modules but instead of the thyristor it incorporates a triac which dose not rectify the AC power, which changes the pitch of the motor sound and is more efficient. This continues into the 95 series where the first hybrid timers come into use with new digital integrated chips and we lose that boom when going into high speeds, still using a triac to control the voltage. Wikipedia link CLICK HERE TO GO TO hotpoint95622's LINK 
This post was last edited 03/01/2011 at 12:48 | ||
| Post# 500331 , Reply# 2 3/1/2011 at 12:58 (4,797 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 | ||
| Post# 500334 , Reply# 3 3/1/2011 at 13:06 (4,797 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 The module in the photo at the top is from the 18680 fited to the base of cabnet. Photo below is the 1851/03 located at the top next to timer, note that there is on heatsink because the thyristor (power micro circuit) is mounted separately to the module on part of the front consol which acts as the heatsink. 
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| Post# 500335 , Reply# 4 3/1/2011 at 13:13 (4,797 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 | ||
| Post# 500339 , Reply# 5 3/1/2011 at 13:31 (4,797 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 | ||
| Post# 500348 , Reply# 7 3/1/2011 at 14:00 (4,797 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 | ||
| Post# 500350 , Reply# 8 3/1/2011 at 14:05 (4,797 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 | ||
| Post# 500362 , Reply# 9 3/1/2011 at 15:40 (4,797 days old) by supermaticjames (Donegal, Ireland) | ||
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Speaking of 1851/03, how is it doing? James. | ||
| Post# 500525 , Reply# 10 3/2/2011 at 05:31 (4,796 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622 | ||
| Post# 500541 , Reply# 12 3/2/2011 at 06:02 (4,796 days old) by hotpoint95622 (Powys) | ||
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hotpoint 95622
Tolivac
Your right the triac is more efficient, cooling, no not a thing just the open frames and thermal cut-outs not even a fan. I have found the only time any amount of heat is generated is during distributing speed and when spinning the movement of the armature is sufficient to move enough air to cool it down agene. | ||
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