Questions tagged [ac-motor]
For questions about electric motors driven by alternating current (AC).
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I removed a little motor from my laptop fan and it won't run using a 9V battery
I realize this is may be a noob question so please point me to the right place to ask it if this isn't so. Anyway, I'm trying to build a little magnetic blender using a spare laptop fan. I tried ...
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Old Record Player Motor Doesn't Have Torque To Start
I am restoring a jukebox from 1953 (AMI E-120). Everything is going fine except the main drive motor, an A/C induction motor, cannot start under the load of the platter. It starts fine when the ...
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Need help identifying wires on 3-phase single-volt AC motor (6 leads)
I'm far from an electrician. Just a guy trying to get some new life out of an existing piece of machinery.
See the image below, this 5HP motor comes from a heavy duty commercial treadmill. Based on ...
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Using thermistor vs. soft starter for motor
What is the advantage that complex soft starters give over NTC thermistors if one is only trying to get rid of inrush current spikes?
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Controlling AC motor with relay vs. switch on motor
Is there a difference in terms of operation between switching a relay connected to mains for an AC motor versus opening/closing a switch on the motor? Would the internal protection circuitry ...
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Electrical Motors and Frequency
I was musing about electric motors after seeing one randomly on TV, and there's something I'm must be remembering incorrectly.
It's just a thought experiment, so I'm imagining some theoretical DC ...
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Speed Controlling an AC motor
Hello I have an AC motor that i want to make a speed controller to, but before i start i want to make sure that it is possible with the type of motor i have. I do not want to waste the motor ...
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How to distinguish a DC generator from an AC generator
I have an electrical generator (a tachometer really) and I want to know how can one detect if it is AC or DC? (what if it is dead and can not be tested for its output?)
I add the image if some of you ...
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Universal Motor as a magnetic brake
Hello friends of stackexchange,
I want to make a magnetic brake based on a universal motor from a Candy wash machine TYPE 20584.528. I suppose that the best way is to use the motor as a DC generator ...
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Why do some motors have high rpm while other have low even though having same power consumption
I have seen a 500w motor which run on 1200 rpm but a 300w motor with over 10000rpm . I know using a gearbox can give required rpm or torque and torque is inversely proportion to speed but how can I ...
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"Digital Clutch" For Electric Motor
I am in the design phase of a piece of machinery that needs a "Digital Clutch."
Requirements of the project:
Machine must run at several different constant RPM settings.
Machine needs to ability ...
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What does "Brushless DC is an AC induction motor with built-in speed feedback" mean?
I found a quote
which states that:
"Brushless DC" is a marketing term for "AC induction motor with built-in speed feedback."
Is it correct? What is "built-in speed feedback?"
I found a decent ...
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Why do Tesla and other manufacturers use AC motors? [duplicate]
I know Tesla and others use AC motors. I read a lot and no one really provides a good answer. I know they are using an AC induction motor, and with Model 3 also an AC synchronous permanent magnet ...
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Why do DC motors cost more than AC motors of the same power?
For high-power motors around 1000 kW, the price of a DC motor is much higher than that of an AC motor of the same power. I know there is a commutator and brushes, but I don't think that is the only ...
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Reversing direction of an AC universal motor
The problem: I have a table saw motor I am trying to use in a jointer and need it to spin in the opposite direction (permanently). I have had trouble finding an answer that I am reasonably sure ...
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