Questions tagged [induction-motor]
Induction motors are alternating current motors with rotors that are energized by induction. They are available with power ratings ranging from about 1/500 Hp (1.5 W) to 30,000 Hp (22MW). They are the dominant type of AC motor used in most of that power range. Squirrel-cage motors are, by far, the dominant type of induction motor.
700
questions
0
votes
0
answers
31
views
Motor selection and control for vertical rod movement
I am motivated by designing a real time project that needs one motor to control the inclination of a metal rod from the vertical axis, with the followings specs:
Weight of the rod: 6 to 8kg.
Hight ...
- 870
6
votes
2
answers
415
views
Three-phase motor Delta/YY connection diagram and windings troubleshooting
I am trying to troubleshoot this 1.4 kW three-phase motor and I'm unsure how its internal windings are interconnected or whether they are shorted.
On the plate it says "Delta/YY 400 V", and ...
- 205
1
vote
0
answers
41
views
Boost inverter IM control by changing dc link voltage instead of the modulation index of the inverter
I have a dc-dc buck-boost converter feeding an inverter in order to control an induction motor. I am using SPWM for the inverter and I am implementing field oriented control for the motor. Instead of ...
- 11
0
votes
0
answers
30
views
Why is the total voltage across my capacitor and load(ac motor) greater than the ac source voltage?
Good morning all, I have been having issues with my circuit; I'm trying to create a regulator for my ac motor and the regulator type I went for is the capacitor regulator which I connected to an ac ...
0
votes
1
answer
34
views
How can I regulate voltage with multiple AC motors?
I have a water treatment system that has several motors and pumps from blowers for aeration to submersible 3hp water pumps. A lot of these motors have to be repaired and replaced often, sometimes 2 ...
- 197
0
votes
1
answer
50
views
A single phase induction motor will not run without the capacitor. Is the main winding damaged?
I have a water pump motor (single phase induction motor) that used to work fine. Recently it will not start running when I close the switch but it will hum for sometime then it will start to run but ...
- 165
0
votes
0
answers
26
views
How to calculate three phase induction machine equivalent circuit parameters (Rs, Ls, Lr, Rr, Lm)?
How to calculate three phase induction machine equivalent circuit parameters (Rs, Ls, Lr, Rr, Lm)?
Only power and torque is given:
Power: 270 kW @ 6000-9500 rpm
Torque: 440 Nm @ 5800 rpm
Vs: 346 V
...
0
votes
0
answers
37
views
VFD - V/F control
I am new to VFD. I came across a code where even in simple V/F control for IM, the algorithm uses Phiboost and calculates Vd and Vq. What is the significance of Vd and Vq in simple V/F control ?
Then ...
- 101
0
votes
1
answer
37
views
How do I correctly use the built-in current sensor in a Yaskawa J1000? [closed]
I am working on a test bed using a Yaskawa J1000. I need to measure current flowing through to the motor. The manual mentions the analog ammeter outputs of the driver. When I connect them to a display,...
3
votes
1
answer
63
views
What type of an induction motor is used in a single-phase non-inverter household refrigerator?
There are many pictures with the 2-phase non-symmetrical (start winding and main winding) on the internet in a single-phase non-inverter household refrigerator.
What type of squirrel cage induction ...
- 31
4
votes
2
answers
127
views
Help to diagnose 3-phase induction motor stuttering
I’m working on a project where I want to run a 3-phase induction motor (see picture for specifics) using a VFD (Variable Frequency Drive). The VFD I have is a cheap Chinese one (the “T13-750w-12-H”), ...
2
votes
1
answer
73
views
Induction motor current higher at no-load than under load
I've just rewound a single-phase, 1/4 hp, 4-pole top-load washing machine motor identical to this one.
It was originally wound in AWG 22 aluminum wire, and I rewound in AWG 23 copper wire, which ...
- 703
0
votes
0
answers
40
views
Ceiling fan: switched capacitors or autotransformer?
I want to control the speed of a ceiling fan. This fan originally came with a wall mounted controller containing an autotransformer with several outputs. Speed is controlled by simply switching coils ...
- 1,049
-1
votes
1
answer
33
views
What is current phase of starting capacitor in single phase motor
Is that staring circuit current lag or leading?
Some maker's document said,
If capacitance is higer, starting torque and current will be higher.
It means that the current is leading (capacitive) in ...
- 143
0
votes
0
answers
99
views
Is there any kind of “motor current/load limit curve”, like the one for wires?
When we try to select a motor protective circuit breaker (for an IEC induction motor), we can compare its tripping curve to the motor’s time-current curve during starting and steady-state. To avoid ...
- 37
0
votes
0
answers
38
views
How to find coefficients of PI controller in system with a closed loop transfer function higher than 2nd order
Take this current control loop for example. For this one, I know to find the closed loop transfer function which will be 2nd order and whose characteristic polynomial can be compared with the the ...
0
votes
3
answers
131
views
How do I find the rotation direction of a single speed, single phase universal 120VAC electrical motor?
Specs:
5hp 16 Gallon Rigid wet/dry shop vac household type
Serial Number: 09270 R 2217
Model: WD16360
120V 10A. 60Hz
Motor:
M188306380002 09241 AD
U79-251200-001E01 120V 60Hz
PROBLEM SUMMARY:
I ...
- 1
1
vote
0
answers
41
views
Trying to get a 10uS pulse width to fire an SCR using a PIC16F884
I have the circuit built and running but I need to shorten the pulse width of the SCR. I am using a PIC16F884 running at 16MHz. I am using a half wave to control a device. When I use a for next loop, ...
- 11
1
vote
0
answers
59
views
Induction vs BLDC generators
I am doing research on wind generation to power local equipment. A sub-project involves choosing the generator and defining the control method.
I am interested in understanding why one motor type is ...
- 11
2
votes
1
answer
250
views
Tesla AC Motor Patent: Is this waveform 90 degrees out of phase in the diagram?
I'm referring the following pictured patent:
Specifically, this portion of the patent:
When flipping and superimposing the two magnets in the picture below, in the middle of the image I see two wave ...
- 371
1
vote
0
answers
91
views
PWM AC AC chopper for single-phase induction motor
I am trying to run a single-phase motor with the help of a PWM AC-AC chopper circuit. The circuit is attached and the experimental results are attached as well.
I have also tried a 220-240 V, 30 W fan ...
- 21
0
votes
0
answers
36
views
How to estimate part-load properties of asynchronous AC induction motors?
In the question Is Power consumed by a motor under various load conditions constant? the user Li-aung Yip https://electronics.stackexchange.com/users/28570/li-aung-yip presented this diagram for the ...
2
votes
0
answers
49
views
How to solve the equivalent circuit of the induction motor?
Let's say I have below given equivalent circuit of the induction motor.
The parameters \$R_S\$, \$R_{Fe}\$, \$R_{load}\$, \$X_M=2\pi\cdot f\cdot L_M\$ and \$X_L=2\pi\cdot f\cdot L_L\$ are known and ...
- 935
2
votes
0
answers
77
views
How to calculate the parameters of the equivalent circuit from the no-load measurement of the induction motor?
I would like to determine the values of the parameters of the magnetizing branch of the equivalent circuit of the induction motor based on the no-load measurement. Based on the Electric Motor Control ...
- 935
0
votes
0
answers
59
views
How to limit Vd and Vq in FOC for 3kW , 48VAC induction motor?
I am working on developing motor controller for AC Induction Motor.Following are the specifications of the motor:
Rated voltage:48VAC
Rated power : 3kW
Rated current :54A
Poles : 4
Position feedback : ...
- 11
1
vote
1
answer
63
views
Can I measure induction motor parameters with measurement tools?
I want to simulate a induction motor in ngspice so I need to model the induction motor as described here. I must calculate the model parameters as described here.
My questions are:
Can I measure the ...
- 11
0
votes
0
answers
80
views
Older induction motor needs spin to start it
Tl:DR Motor requires hand spin to start. No starter switch.
EDIT Further information:
So I tried removing the capacitor completely. Started it.
Starts very slowly, with much grumbling. Give it a ...
0
votes
2
answers
103
views
Induction motor control panel circuit
Updated Again:
I have been working on this project for a few weeks now, with an end goal of having a control panel to power our two 120 V induction motors and 6 lights on the control panel using two ...
0
votes
1
answer
38
views
What is the start current for an AC induction motor with a nominal voltage and current of 72V- 65A?
I have an induction motor with the specification of 72V rated voltage and 65A of rated curent.
I have power supply with 72V and 100 A of current. Can I use it to move the motor? The peak curent of ...
- 13
1
vote
0
answers
99
views
Why does an induction generator operate at leading power factor?
The power factor of a single-phase induction motor is usually lagging whereas the power factor of an induction generator is leading.
From my understanding an induction motor needs reactive power to ...
-1
votes
2
answers
125
views
If a VFD-driven induction motor can be operated as a generator, what will be the voltage and frequency of the generated voltage?
It is known that when an induction generator is connected to the grid, the frequency and voltage of the electricity generated will be that of the grid but when the VFD is connected inbetween grid and ...
0
votes
0
answers
431
views
How to calculate torque of a three-phase induction motor?
I have a three-phase induction machine with following nameplate data:
\$V_{s_n}=\frac{425}{\sqrt{3}}\,\mathrm{V}\$ - effective value of the phase voltage,
\$f_n=70\,\mathrm{Hz}\$ - nominal frequency,
\...
- 935
2
votes
1
answer
50
views
Can I use a 3-phase driver like FNB41560 on 1- and 2-phase motors too?
I want to reduce complexity on buying many different parts and design different circuits. So I'm thinking if I can buy just FNB41560s that are well priced and simple and are capable of driving 3-phase ...
- 69
0
votes
1
answer
36
views
How to find per-phase inductance and resistance of an induction motor in MATLAB?
The data provided is just the output in kW, motor speed, and torque. Is it possible to find the per-phase inductance and resistance in MATLAB, assuming the necessary values of other parameters?
- 11
0
votes
0
answers
41
views
PSC motor with no load
I bought a 230 V, 250 W output (1/3 HP?) 4 pole permanent split capacitor motor to replace a 1/4 HP split phase motor in a potter's wheel. Motors are not my area of expertise but from what I have read ...
- 1,252
2
votes
2
answers
84
views
Can we run an induction motor by sequentially applying DC voltage to the windings of stator?
We know that in induction motors, 3-phase AC input is applied to 3 windings of stator in order to generate changing magnetic flux in the rotor. What would happen if we apply 3 DC voltages ...
- 91
0
votes
1
answer
169
views
Speed control of a PSC induction motor, how does it actually work?
I'm trying to understand the physics and engineering behind speed control on PSC induction motors, usually seen in fans/HVACs.
I have come across this link, but I don't quite understand everything ...
- 473
0
votes
0
answers
31
views
modelling and simulation of a motor generator set for the replacement of diesel engines
Can a motor-generator set with specifications and outputs as shown in the picture below be used to power a 16 kW, 220V house?
user313612
0
votes
0
answers
26
views
Can I rewind a 4-pole motor to be a 2-pole motor with the same design voltage? [duplicate]
I had a 4-pole motor whose winding was irreversibly damaged and I had to cut it off.
I was planning on rewinding it exactly as it was (I measured everything before cutting off), but then I stopped to ...
- 703
2
votes
3
answers
653
views
Will adding a resistor in series to a water pump increase the draw current?
I'm confused with the situation below.
Say I have a water pump rated 240 VAC and 240 W. Without a resistor, the drawn current will be 1 A since P = V·I.
By adding a 10 Ω resistor, the voltage drop ...
- 609
1
vote
0
answers
191
views
Number of turns needed to rewind a 4-pole motor as 2-pole
I'm wishing to rewind a 4-pole, 1/2 cv motor as a 2-pole motor for the same voltage rating.
Its stator has 32 slots, and the main winding looks like this:
It's a concentric winding, made of 4 ...
- 703
0
votes
0
answers
166
views
How to calculate breakdown torque for this question
I have been following the lecture notes for these three slides:
I applied the equation for the question below:
The answer given for the breakdown torque for this question is 572.5 Nm.
I have plugged ...
- 609
0
votes
1
answer
52
views
How to debug issue with 220v AC motor that blows internal fuse
I've got a 220v dust collector (shopfox w1666) that consistently blows the internal 18amp fuse shortly after it turns on. Video here:
https://imgur.com/mjP4KH2
I think this started happening after I ...
- 101
1
vote
1
answer
91
views
Unknown component in a shaded pole motor coil
I dismantled a shaded pole motor and just found a component under the tape of the coil. It is placed in series with the copper wire. It is marked L120 Y068A3 (see picture). It comes from a breast pump ...
- 47
0
votes
0
answers
99
views
Wiring hard start kit to compressor
First of all, I am not sure if this is something for electrical engineering or home improvement, therefore feel free to flag it as wrong community if you disagree with my choice.
Now, I am trying to ...
- 334
0
votes
2
answers
92
views
What should I do with the neutral line while running 3-Phase induction motor?
As far as I've seen, low voltage distribution lines (3-Phase 440 volts) have four wires - three phases and one neutral (Ignore the earth cable). What should I do with the neutral line if I want to run ...
- 2,321
1
vote
2
answers
100
views
How to properly start an induction motor using a variable frequency drive? [closed]
I've seen on several websites that a variable frequency drive (VFD) can be used as a starter for induction motors, but didn't find any details calculation on what should be the starting frequency.
In ...
- 2,321
-1
votes
1
answer
55
views
Confusion of measuring the stator voltage of induction motor [closed]
I'm new to inverters and the only way I know how to measure the stator voltage of induction motor is to connect the multimeter to terminal of junction box. So could anybody please elaborate more about ...
1
vote
0
answers
59
views
switching inductive load using ESP8266
I have ESP8266 and I want to turn off/on my 1hp-compressor-water-pump.
How can I trigger my motor using ESP8266, what component should I use to on/off my motor. I don't want to use 12V (relay uses 12V)...
- 107
0
votes
1
answer
144
views
How doest this PSC multi-speed motor circuit work?
I've been replacing the thermal fuse of my fan blower each time it trips (every year or so, when the oils degrades).
But this year I decided to look at how the motor works. It has 3 speeds (slow, ...
- 3