Questions tagged [universal-motor]

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2answers
89 views

Why is it an advantage that carbon brushes have 'high resistance'?

I recently heard that in a universal motor (and I'm presuming regular DC motors too) they use "high resistance carbon brushes", and I can't seem to find anywhere that explains why they need to use "...
0
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1answer
41 views

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 ...
1
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1answer
92 views

How to wire an old single phase AC brushed motor to be reversable

I have searched several forums and found a lot of interesting stuff, but nothing yet that really applies to my situation. I have an old Westinghouse FH motor 1 1/2HP single phase brushed AC motor. ...
0
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1answer
73 views

Is there anything that can be done about this U5215 universal motor? [closed]

Recently my hairdryer stopped working properly. While drying my hair, the fan would suddenly turn off after a minute or two (it seems as if a thermal switch in series with the motor cut the current to ...
0
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0answers
28 views

isolation of Universal motor

Im working on a AC triac motor controller for universal motors For this I want to measure the motor current and the speed. For the speed the motor provides a tacho-signal. To isolate the measurement ...
0
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2answers
279 views

Max startup current for Vacuum cleaner motor

We used the vacuum cleaner motor 2200W 220v in one dental device (vacuum former) as you can see here: So now one of our costumers said when they used this device the power cable is warmed and when ...
1
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3answers
176 views

How to make linear actuators go in both directions? (Using arduino/microcontroller)

I'm stuck here, I want to make the lineal actuators to go up and down, both of the actuators move to the same direction at the same time. The arduino receives a signal as input and then the ouptut ...
0
votes
4answers
106 views

Phase control universal motor dimmer

I need to control the speed of a 220v universal motor using arduino and I am thinking to use an atteny85 ic with a phase control circuit (ltv814 to detect zero crosses and moc3052 to drive a triac to ...
1
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1answer
169 views

220v universal motor Arduino control

I bought a 220v 100w sewing machine motor to use it in a project Firstly I thought that the motor works only on ac (because there is 220v written on it) and just for try I gave it 30v dc and ...
2
votes
1answer
230 views

I don't understand the windings inside my power drill. [closed]

I was curious about how my power drill worked and I disassembled it. I understand the general principles at work here but I don't understand why the winding is set up this way. I assume running ...
0
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1answer
118 views

Sizing Transistors for 2.2hp universal motor controller

my background is mechanical and as you can see I have just enough electrical knowledge to be dangerous. I have an application where I'm trying to use 2xFDP51N25 in parallel to drive a (2.2hp) ...
0
votes
1answer
562 views

Universal motor as DC generator

I want to use universal motor as a DC generator. The motor specifications are 180 Watt 230 V 10000 rpm When I supply the motor with 3000rpm it gives 1.5V. I thought it was rpm problem but when I ...
0
votes
1answer
244 views

small AC commutator motor issue

I have a small vacuum cleaner motor, single-phase, AC commutator motor, 120V, 4 A Max., series wired (all coils, brushes connected in series), no start capacitor, two-pole field stator, with thermal ...
4
votes
2answers
398 views

Serial diode to universal motor and brush lenghts differs on intermittent run, why?

A universal motor supposed to be run in two speed stages: full speed / reduced speed and motor will run on intermittent duty like 3 seconds ON / 3 seconds OFF. So simply I added a serial diode (BY255)...
0
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1answer
370 views

9 wire universal motor

So I found an old washing machine and salvaged the motor. However I can't find any information about how to wire it because it has 9 wires coming out. So 2 of them are speed control = 7 to go. 2 are ...
-1
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1answer
144 views

Universal motor with non-sinusoidal wave

As everyone knows, the line voltage coming out of your wall is in the form of a sine wave. Universal motors are designed to be capable of running on both AC and DC since they are self-commutating. For ...
0
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0answers
379 views

Does a universal motor run better on flat DC as opposed to pulsed DC?

After reading this: Is there any advantage in running a universal motor on DC power? I want to know, does it improve the motor characteristics if you supply the motor flat DC instead of pulsed (...
3
votes
1answer
2k views

How does this circuit control motor speed?

I was curious to see how the foot pedal of a sewing machine drives the universal (?) motor inside the appliance. I had expected a simple variable resistor like the ones in vintage machines but that's ...
3
votes
1answer
2k views

How does the power usage and voltage of a universal motor change when running on DC?

I have a 2400w universal motor from an AC powered garden blower (230V @50Hz here in Australia) and am wondering what voltage and power requirements it would require from a DC source to give roughly ...