Thank you for your videos, I was able to use the same speed controller and I left my wire diagram back home and needed to pause @0:05 to ensure that I had the correct polarity even though this is an ac circuit.
Somewhat of an over simplification... but the end result is basically the inverter controls the frequency via PWM (pulse width modulation)... and is something I am no expert in. Thanks for watching!
No. Voltage in equals voltage out. If you watched the video you would see the motor speed is controlled by cutting off the frequency waveform. Thus the motor still sees full voltage but for a varied length of time, which is how the speed is controlled while still allowing the motor to develop full torque.
hi ron thank you for sharing, if you have the time i would like to ask you a few questions. do you know any reliable schematics for making a speed control like the one you showed? can this control handle 10kw for real? the lamb motor is a brushed one, can this be applied to induction motors? sorry they may seem very basic questions, i`m not that into power electronics but i`ve assembles some circuits before and now need some solutions as i`m planning to make a welding turntable and need some way to control rpm. thanks. pete
I do not have any schematics. I must admit I questioned the 10,000 watt thing myself. I bought this because it had one of the ratings plus the cooling fan... then hoped for the best. I have no intention of trying to load it up anywhere near stated capacity. I am going to guess "no" for induction motor... but this is listed on Amazon and I suggest you ask the seller. www.amazon.com/dp/B00C470OBW/ref=twister_B0107YC8HQ?_encoding=UTF8&psc=1
I know this is an old thread, but let me chime in. All I know is only a 3 Phase AC induction motor can be controlled with PWM speed controller. If you want to control the speed of motor, the most efficient way is to use a servo motor, it's cheaper, lighter and more efficient. You can find a good a 550W servo motor with a speed controller for $55. If you are going to build a welding turntable/BBQ grill, you can find a cheap DC gear motor (1 rpm) on Aliexpress for less than $4 and PWM speed controller for $4.5
The description for the Ametek Lamb blower and the motor speed control are given in the video. Searching on eBay should find them. Or I would sell you these for my original cost plus shipping since they have not worked for my intended purpose. If interested please send me a private message with your email address.
Hopefully it will be quiet enough. A few years back i investigated for a real pipe organ blower, the smallest one was 1200 euros, from Laukhuff. At those prices it might be a better idea to save up for a real pipe organ solution from a company.
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Interesting speed controller. Looking forward to its final application demonstration.
Thank you for your videos, I was able to use the same speed controller and I left my wire diagram back home and needed to pause @0:05 to ensure that I had the correct polarity even though this is an ac circuit.
My understanding is that the thyristor chops or modifies the sine wave not the frequency. Inverter speed controller changes the frequency. Am I wrong?
Somewhat of an over simplification... but the end result is basically the inverter controls the frequency via PWM (pulse width modulation)... and is something I am no expert in. Thanks for watching!
can you use this to go beyond the max voltage a little bit ?
No. Voltage in equals voltage out. If you watched the video you would see the motor speed is controlled by cutting off the frequency waveform. Thus the motor still sees full voltage but for a varied length of time, which is how the speed is controlled while still allowing the motor to develop full torque.
Hey ron , you really knowledge is impressive. Have you put any thought into building your own speed controller?
I gave up on using the Ametek Lamb blower because it is too noisy. I ended up using a DC motor to power the blower for the calliope..
hi ron thank you for sharing, if you have the time i would like to ask you a few questions. do you know any reliable schematics for making a speed control like the one you showed? can this control handle 10kw for real? the lamb motor is a brushed one, can this be applied to induction motors? sorry they may seem very basic questions, i`m not that into power electronics but i`ve assembles some circuits before and now need some solutions as i`m planning to make a welding turntable and need some way to control rpm. thanks. pete
I do not have any schematics.
I must admit I questioned the 10,000 watt thing myself. I bought this because it had one of the ratings plus the cooling fan... then hoped for the best. I have no intention of trying to load it up anywhere near stated capacity.
I am going to guess "no" for induction motor... but this is listed on Amazon and I suggest you ask the seller. www.amazon.com/dp/B00C470OBW/ref=twister_B0107YC8HQ?_encoding=UTF8&psc=1
thanks man. take care. pete
I know this is an old thread, but let me chime in. All I know is only a 3 Phase AC induction motor can be controlled with PWM speed controller. If you want to control the speed of motor, the most efficient way is to use a servo motor, it's cheaper, lighter and more efficient. You can find a good a 550W servo motor with a speed controller for $55. If you are going to build a welding turntable/BBQ grill, you can find a cheap DC gear motor (1 rpm) on Aliexpress for less than $4 and PWM speed controller for $4.5
Is it possible to buy something similar to this?
The description for the Ametek Lamb blower and the motor speed control are given in the video. Searching on eBay should find them. Or I would sell you these for my original cost plus shipping since they have not worked for my intended purpose. If interested please send me a private message with your email address.
It looks like a turbo
Hopefully it will be quiet enough. A few years back i investigated for a real pipe organ blower, the smallest one was 1200 euros, from Laukhuff. At those prices it might be a better idea to save up for a real pipe organ solution from a company.
If it had a wireless remote control it''d be nicer.