Speed Control - AC and DC Motors

Better understand how to vary the speed in electrical motors. Both AC and DC motors.

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[hareshdealwis]

awesome detail introduction mate thanks heaps

[terancegonsalves]

Hi Nice video. Just wanted to know if we can controll the speed of an Exhaust fan motor with a regulator

[foureyedchick]

There was absolutely no mention about using a PWM method to control the speed of a DC motor with constant voltage.

[wayne]

You can use a rheostat on a tiny motor, but a PWM does a terrific job on other DC motors. How are you using a PWM with AC? I was under the impression that a PWM
was for DC only.

[tomaspesliii]

How do I find what kind of speed sensor my electric motor has.

[GoogleUser-yjwy]

Hi I have a 1.1kw extractor fan, €300 it cost, Chinese made, can a normal fan speed controller work on this motor do you think? The fan speed controller was a €15 one from amazon I hooked up to it, it worked well to lower the speed but after only 2 hours of running the motor tripped the RCD and smoke coming from motor
Part of me thinks it may have been just a low quality motor with a fault in it but do u think it was the controller I was using?

[adamb]

Is the flux control method better for higher voltage dc motors then the armature control method?

[georgelast]

Hi, you talk about controlling speed of a motor but you don't mention that you will have less power when the voltage is decreased. For example, let's say I have a large machine that needs a lot of torque so I want to lower the speed but maintain the torque how would I do that without losing power from the motor. Thank you

[MiguelGarcia-lxvu]

Man!
If there are other AC control techniques that are not covered in this video, at least the names should be mentioned.

[dimassantiago]

I have 3 leeson 3/4 Motor #C42D17FK7D WHAT CAN I USE FOR SPEED CONTROL FORWORD, STOP & REVERSE & to turn it on?

[MalindoWe]

I'm not convinced about speed control by changing frequency, it could burn out

[tango-bravo]

Can these be added to a vintage Dunlap 1/4HP split phase 60 cycle / 5 amp electric motor?

[davidtaylor]

Difficult to follow. Not enough visuals at the beginning: what you hear you forget (if you understood in the first place). Surprising shortcoming for an Educator!

[adamdeste]

I need some help . I bought an electric scooter in China. The motor watts are 1500w. The bike barely goes 47km/Hr. I know it can go faster but the regulations require to limit all electric bikes to less than 60km/Hr. The manufacturer told me the bikes are modified to limit them at 47km/Hr. The speedometer still maxes out at 67km/Hr. But the bike doesn't accelerate beyond 47kmph. I know that tweaking the controller might fix this problem. Because the motor has enough wattage to achieve a speed of 67km/Hr. I need some advice. Should I change a modulator ? Which one would be suitable ? The batteries are rated at 72V20Ah.

[SickKangaroo]

Hi came across your channel first time today
In your opinion, can I use a 4000W 220V AC SCR Voltage Regulator. To lower the speed of a single phase 1/2 HP motor. 🥴

[jamescole]

Totally doesn't make sense. So you are saying when you decrease the current to the motor it will go faster? Maybe under no load. That is like saying when you take your foot off of the gas pedal the cars engine will go faster. You also need to put torque and power into this equation. Are you also saying if you decrease the current to the motor it will have more power? Of course that would be nonsense.

And when you decrease the voltage supply to the motor, that is the same as decreasing the current to the motor. I = V/R. Current and voltage are directly proportional.

You would have to show an electrical diagram to make sense of what you are saying. You could be right, but you surely didn't explain anything regarding DC motors.

[mrashad]

I am here for the methods of AC Motor speed control not covered in this video.