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.

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Simulation of field oriented control of three phase induction motor

I have been developing a simulation of the field oriented control algorithm of the three phase squirrel cage induction motor in the Xcos (equivalent of the Simulink). The simulation consists of ...
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How to set solver for control loop simulation?

I have been developing a simulation of the field oriented control of the three phase squirrel cage induction motor (control is oriented by the rotor flux). I have been using the Xcos which is an ...
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35 views

How reliable are motor power ratings through time (old motors vs new motors)?

I'm making this question here because I'm a little bit confused with what I've been seeing from some old and new 1/2 hp motors. I've bought a 1/2 hp induction motor (4-pole, single phase, capacitor ...
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Why can't I change the speed of an ininduction motor by changing the voltage?

Given a three-phase asynchronous AC motor ("induction motor"), I tried figuring out whether lowering speed / torque by lowering the supply voltage should work, similarly to how it works with ...
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88 views

How can an electric motor car have a turbo? [closed]

I am not familiar with all the different vehicles on the road nowdays but I have read descriptions of electric vehicles. i.e ( EV) that are turbo powered. How can an EV be "tubo" when turbo ...
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How to calculate rotor flux of the three phase squirrel cage induction motor?

I have a three phase squirrel cage induction motor with given parameters (stator winding connected in delta) nominal power: \$P_n = 280\,\mathrm{kW}\$ nominal stator voltage: \$V_{sn} = 500\,\mathrm{...
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37 views

Transverse Flux Machine

For research, I want to build a levitation system that can levitate an aluminum sheet. With traditional 3 phase Induction engines you off course get levitation, but it isn't as stable as I want to. I'...
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41 views

Creating a 3 phase current

For an experiment (generating a travelling magnetic field) in high school I need a 3 phase current. My school does not have access to 3 phase power. Therefore I need to generate the 3 phase power out ...
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67 views

Clarke transform of pwm signals

I have been developing a simulation of field oriented control of three phase induction motor. During this process I have encountered strange behavior of the Clarke transform. In case I have three ...
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What can be the consequences of a smaller airgap in a induction motor for the efficiency and rotor current?

Last year I bought 3 motors from a junkyward, and one of them was a 1/4 hp, 4 pole single-phase induction motor made by WEG for an Electrolux washing machine. Or at least it was supposed to be, cause ...
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How to increase the power of an electric motor?

What's the difference between a 1HP and 2HP electric motor? Slightly different dimensions: They look almost identical: Here are the specs: Same top speed (RPM). Same Voltage. Difference in current ...
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51 views

How does adding resistance to a wound rotor induction motor increase torque?

I read that adding resistance to the rotor circuit causes the induced current in the rotor to be more in phase with the stator current. This produces a very small phase angle difference between the ...
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61 views

Discrete Luenberger observer for the three phase induction motor

I have continuous time version of the Luenberger observer for the three phase induction motor in following form: $$ \dot{\hat{\mathbf{x}}} = \mathbf{A}\cdot\hat{\mathbf{x}} + \mathbf{B}\cdot\mathbf{u} ...
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Grinder hums but won't run. Capacitor seems good, and so do windings

My Grandpa gave me a bench grinder recently to fix. He said he was using it a lot, grinding and grinding, then he heard a pop, and it stopped working. Now it just hums, and starting it by hand doesn't ...
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1answer
37 views

What should be the phase difference in the two windings of a split-phase induction motor?

I'm having a little basic problem here. I'm trying to reconnect the coils of a 4 pole motor (concentric winding) to make a 2 pole motor. I've managed to make it work in 2 configurations so far (in two ...
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99 views

What are the properties/advantages of concentric winding?

I have seen several 4 pole induction motors that have coils wound like this: Both the main winding and the auxiliary winding have 2 pairs of these coils. This is concentric winding and I've only ...
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1answer
51 views

How to correctly read the nameplate of a Bitzer motor

This is the first time I have dealt with a BITZER compressor and the concept of part winding start. I have searched for meaning of all the information on the nameplate of a compressor motor. I want to ...
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1answer
25 views

How to size The DOL Motor Starter knowing that the motor is a part winding start motor

I have a BITZER compressor type 4GE-23Y-40P, with a part winding start option of the motor Nennspannung = nominal voltage = 380-420 Frequ = frequency = 50 Betr. strom = maximal operating current = 43....
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119 views

Unexpected behavior of the Luenberger observer for three phase induction motor

I have been developing control software for three phase induction motor. The control software will implement the field oriented control algorithm. The considered algorithm is oriented to the rotor ...
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1answer
61 views

Is there any way to wind this 4 pole motor to behave as 2 or 8 poles properly?

I got an induction motor in a junkyard, a WEG motor made for an Electrolux washing machine. It is a single-phase 1/2 hp 4 pole motor. It runs in 127 V and has a 40 uf capacitor feeding the auxiliary ...
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2answers
64 views

What is the current classification of linear motors used for positioning and scanning applications?

I am doing some research on positioning and scanning systems but I am encountering some problems trying to categorize linear motors. I can't understand what type of linear motors based on induction ...
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1answer
60 views

How does a contactor holding work?

If I'm correct, AN in below picture is an electromagnet. When the switch S is pushed, the electromagnet AN connects L1 to T1 and L2 to T2. When the switch S is released, the electromagnet AN ...
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53 views

Why 2 pole induction motors don't use auxiliary windings while running (while others do)?

Most motors with more than 2 poles I see (4 poles, 6 poles etc) use a run capacitor and a use the auxiliary winding all the time. Some even employ starting capacitors but they always have a run ...
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1answer
107 views

How to use Luenberger observer for induction motor rotor flux estimation?

I have implemented field oriented control algorithm of three phase induction motor with speed sensor. Now I would like to improve the rotor flux estimation algorithm with Luenberger observer usage. My ...
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Requesting Advice For Selecting And Sourcing A “Medium Torque” Motor

For a prototype project I'm building, I need to select a motor. I'm not familiar with different types of motors, so I have been trying to do some research. However, most of the stuff I have been able ...
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Why is this 240V / 20A motor labelled 3HP?

Here's the motor badge: As far as I know, 115 V x 40 A = 230 V x 20 A = 4600 watts which is equivalent to ~6.2 HP, all presumably @ full load. So what does the "3 HP" mean? I know that in ...
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135 views

Do Induction Motors only work if the rotor's coils have a finite resistance?

I just did some calculations, and to me it seems that the induction motor only works when the rotors coils have finite resistance: I will show that for a single conducting loop, whose current is ...
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1answer
37 views

How to achieve four quadrant operation of the field oriented control of the three phase induction motor?

I have been developing software for field oriented control of the three phase induction motor. I have been facing a problem how to incorporate changing of rotation direction into the control software. ...
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1answer
20 views

How much high is the amplitude of stator-MMF of 3-phase 2-spp integral slot winding type machine as compared to 3-phase1-spp machine of same type?

Details: No. of POLES=2; i.e 1-pole pair SPP= slots per pole per phase In my case, amplitude of MMF of 3-phase 1-spp machine= 0.75; Then what should be the amplitude of MMF for 2-spp machine ? Is it ...
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91 views

Why does my ceiling fan spin the wrong way?

My ceiling fan blows are at the ceiling (uselessly). At first, I wondered whether I could fix it by maybe removing it and switching some kind of polarity. But is there a polarity? Aren't the ...
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49 views

Torque and Flux Current

It is said that vector sum of flux and torque current equal to total current drawn by the motor but there are also some currents flowing due to copper losses and rotor leakage inductance. In my ...
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61 views

Is upsized reactor allowed for the comparitively less motor HP?

We have a LV-MCC in our commercial outlet having a 480 VAC, 15 HP VFD with line and load reactors in series with it. The VFD is sized for 22.0 A (normal duty), the motor has a horsepower rating of 10 ...
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32 views

Routine Tests on Motor

I was going through the standards related to motor testing that are IS 12615, IS 15999-1, IS 15999-2-1 while reviewing a motor with requirements of 3phase induction motor, 1500rpm, 120hp, 415V and ...
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1answer
61 views

Tesla Model S inverter DC bus voltage

I was recently researching about this Telsa electric car inverters where i found one intresting thing. Usually in the voltage source inverter the DC bus voltage will be around 600 to 650 V considering ...
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2answers
99 views

How to control braking circuit of the three phase voltage source inverter?

I have been developing a control software for the three phase voltage source inverter for three phase induction motor control. There is a requirement to implement regenerative braking algorithm where ...
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21 views

How to determine transform angle in field oriented control of three phase induction motor

I have been developing a control software for the field oriented control of the three phase induction motor. I have studied a lot of application notes and literature about this topic. Based on that I ...
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1answer
42 views

Rotor Current and Torque Producing Current in Induction Motor

Is rotor current of an Induction motor always same with torque producing current? In torque equation of Induction motor, there is also one factor called rotor power factor. if rotor current and torque ...
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1answer
45 views

Garage door openers - BLDC x AC monophasic - Is that possible?

As far as I know, electronic control boards for garage doors, they basically control two main types of motors: AC induction monophasic, one neutral and two phases, driven by TRIAC or relay. It takes ...
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135 views

Why do MOSFETs keep blowing after I replace them in a kickscooter controller?

I have a few Segway Ninebot ES4 kickscooter controllers that I would like to learn how to fix. Essentially at some point the motor ceased and seems to be fused, won't accelerate, won't brake, and even ...
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1answer
36 views

Control software for three phase induction motor

I have been writing a control software for field oriented control of three phase induction motor. As far as the platform I have been using the FreeRTOS real time operating system. My plan is to ...
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2answers
63 views

Synchronous Speed

What is the difference between an induction motor and a generator as far as synchronous speed is concerned? If they both run at 60hz how is the generator providing power while the motor uses the power?...
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73 views

Motors Delta/Star connections to VFD

I've selected 230/400V motors (delta/star) and corresponding 400V VFDs for pump motors. Now I've been asked why I haven't selected 400/690V motors (delta/star), that are the standard and usually ...
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1answer
39 views

AC Induction Motor Slip and Torque control Vs V/f control

I am trying to understand this github code for speed control of AC Induction Motor. It calculates slip value to adjust the speed of motor. I wonder if its the same thing that is called constant V/f ...
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1answer
41 views

Understanding voltage sampling rate of induction motors

Why it is required to have a sampling rate of at least 4kHz when sampling the voltage waveform of a three phase induction motor? I find most research papers use 4kHz but they don't state why. I want ...
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2answers
106 views

Operation of Induction Motors and their Back EMF [duplicate]

I'm trying to reconcile the physical steps that go into the operation of an AC induction motor. Looking online, I either find broad and general explanations that I already know and understand, or very ...
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1answer
50 views

How to wire AC motor for old fan?

I have a AC motor and it's belong to an old desk fan, unfortunately I missed it's circuit diagram, so it would be great if you could help. My AC outlet supplies 220V, and the motor comes with a 1.5uF ...
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193 views

Calculate motor current consumption

I have the following problem: MY ATTEMPT Okay on this site, https://www.jcalc.net/motor-current-calculator, I found a formula for the motor current with full load and a 3-phase supply: \$I=\...
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1answer
53 views

Electric Motor-drive type/setup recommendations needed. I need 90,000 rpm at the output shaft @ a power of 30kW.? [closed]

I am repurposing a car turbocharger to be driven by electric motor. It requires around 30kW, @90,000 rpm to function in the desired range. Which type of motor should I use? I'd probably have to use a ...
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2answers
71 views

Which winding is the auxillary winding in a permanent split capacitor motor?

I have an induction motor, I'm very sure its a permanent split capacitor motor. One winding is 16 ohms, the other is 4 ohms. I have seen that the higher resistance winding, the 16 ohm one, is the ...
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1answer
61 views

Unknown induction motor wiring?

I just took apart an old dishwasher for parts. The large motor I got from it seems to be an induction motor. It has 4 wires. Green, yellow, red, and blue. I know for a fact that the green one is ...

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