It is currently 28 Mar 2024, 17:15
Doug wrote:Bob you link doesn’t take me to your video just a list of random videos
Excellent thread Bob!9fingers wrote:Induction motors are the quiet (ish) ones usually with a capacitor(or two) on the side and almost certainly on fixed machinery.
If the machine is portable, noisy, under say 2000watts and has brushes and a commutator, it is a universal motor and suitable for use with this soft start type system.
HTH
Bob
Jonathan wrote:Excellent thread Bob!9fingers wrote:Induction motors are the quiet (ish) ones usually with a capacitor(or two) on the side and almost certainly on fixed machinery.
If the machine is portable, noisy, under say 2000watts and has brushes and a commutator, it is a universal motor and suitable for use with this soft start type system.
HTH
Bob
Out of curiosity would this work on bigger motor's like a 2 to 3 kw spindle moulder or extractor?
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the bear wrote:No part of it is unclear, just a hypothetical question from me. Sorry Bob
Mark
9fingers wrote:Yes it is a brush motor and not an induction motor **so in theory suitable. I can’t read the current rating on the motor plate though. The module I used is marked as 20amps but I’d like to see a bit of a margin between the motor rated current and the max for the device.
Assuming your machine runs from a 13 amp plug comfortably then you should be fine
**it is just possible your motor is a repulsion start motor, about the only induction motor I know of with brushes
Bob
9fingers wrote: I settled on one reputed rated for 20amps thinking that would be more than enough to handle most of my brush motor tools including the inrush current.
This is the unit I bought https://www.aliexpress.com/item/1005003 ... 1802pENSnr
There are several types but make sure you get a two wire one for ease of use
Bob
CHJ wrote:9fingers wrote: I settled on one reputed rated for 20amps thinking that would be more than enough to handle most of my brush motor tools including the inrush current.
This is the unit I bought https://www.aliexpress.com/item/1005003 ... 1802pENSnr
There are several types but make sure you get a two wire one for ease of use
Bob
Bob, do you know how the internals function using just 2 'In & Out' wires.' Is it just a thermal 'Negative' resistance module' ?
All devices I've ever used where 3wire, and ones with a heat sink/mounting tab used the Tab as the ground reference.
John Brown wrote:On this subject, I'm hoping to be able to run my saw(1600W) and/or my bandsaw(450W) from a 3 or 4kW pure sine inverter. One of the inverter manufacturers says their Inverter has a soft start, and that turning on a large appliance before starting the inverter helps with startup. Obviously this won't work with NVR controls. Would a soft start module help in this case?
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