Questions tagged [ac-motor]
For questions about electric motors driven by alternating current (AC).
23
questions with no upvoted or accepted answers
2
votes
0
answers
163
views
Multimeter and clamp give different AC current measurement
I am trying to measure the power output of an AC permanent magnet motor to a load (a resistor). To do this, I am measuring the current through the resistor, and the voltage across the resistor. To ...
- 21
1
vote
0
answers
50
views
Identifying old capacitor
I need help identifying the capacitor that needs to be replaced. The capacitor was located in the motor of the sewing machine. It is not clear in the pictures, but it says:
.01 + .0005 x 2 and 600WV....
- 11
1
vote
0
answers
66
views
How can 120V fail to spin an AC motor that spins fine with 120V on a different power source?
While troubleshooting a home appliance, I found something odd: a 120V AC refrigerator fan stopped spinning despite being connected to 120V AC voltage (verified with my multimeter) inside the ...
- 159
1
vote
2
answers
177
views
Coil winding direction in a shaded-pole motor (4-pole)
I have rewound a shaded-pole motor (4-pole).
It's wound around the stator in a clockwise motion and around each coil in a counter clockwise motion.
Is the winding being incorrect the reason why the ...
- 11
1
vote
1
answer
75
views
Oversized electrical motor, synchronous, vs asynchronous
I know that a oversized motor would consume more energy than a well sized one, and in a low load scenario it will present a lower power factor than a well-sized one too. My question is, what is the ...
- 13
1
vote
0
answers
121
views
Can this blown component be identified?
I was repurposing a universal motor from a blender for a home project. Unfortunately a screw went through a wire and shorted to ground. Many components are damaged. I'm assuming the motor is fine. The ...
- 65
1
vote
0
answers
22
views
Reconnecting a rewound 110vac motor to power
Motor is (about) 5hp 110vac and powers a a table saw.
Motor was recently rewound but previous owner did not reconnect to the power cord.
There are no info plates on the motor to help w/ reconnecting.
...
- 11
1
vote
2
answers
180
views
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 ...
- 41
0
votes
0
answers
40
views
AC Motor Control with TRIAC
I want to drive an AC motor using a TRIAC. I am new to this topic. I built this circuit and found that it is not working. What could be the reasons for this?
0
votes
0
answers
60
views
What parameters give unlinear torque model of induction motor?
I want to realize factors which give nonlinear model of torque toward speed with power consumption in induction motor.
I tried find math model induction motor. But usually, I had same charts:
As we ...
- 1
0
votes
0
answers
36
views
Can I run a one-phase AC capacitor motor from a three-phase VFD?
I'm building an art installation and found a cheap but strong AC Motor with capacitor. So by my understanding it is a one-phase capacitor run motor. The shield with the specs is very old and hardly ...
- 1
0
votes
0
answers
18
views
Impact of Low Power Factor on Loss Generation in PMSMs
I am focusing on the losses generation in PMSMs and still have some doubts about the role of a low power factor.
For the analysis, I consider a three-phase PMSM controlled with Field Oriented Control (...
- 1
0
votes
0
answers
45
views
Wiring AC 5 Wire Motor with 4 Phases to Run at Max
I'm trying to hardwire a fan motor to always run on max. Currently, it has a circuit board that allows you to adjust the speeds and requires a bit of fiddling to turn on and set the speed when the fan ...
0
votes
0
answers
48
views
Variable speed drive for an alternating current motor with PIC18F4431
I'm designing a control board for a three-phase motor speed controller using a PIC18F4431. I've used an inverter powered by 24V DC to convert the voltage to 24V AC to power the motor. Additionally, I'...
- 1
0
votes
0
answers
35
views
TRIAC Controlled Motor circuit: PWM logic doubt
I'm working on the logic board of my kitchen air extractor. I wanted to "hijack" the controls (physical buttons) to be able to control those with an ESP8266. While I was analyzing the ...
- 25