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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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 ...
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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 ...
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How to evaluate inverter output voltage imbalance

It's easy to evaluate the voltage imbalance of grid output voltage, but I'm not sure how to evaluate the inverter output voltage imbalance. Is it to extract fundamental wave and evaluate the voltage ...
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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 ...
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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 ...
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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)...
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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, ...
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Difference between voltage measuring from induction motor junction box and VFD output terminal

I want to measure stator voltage of VFD fed induction motor. It's common to measure from juction box, which should be the exact stator voltage of induction motor, but I wonder if it's possible to ...
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Low inductance high torque motors

Internal inductance of motor windings reduces the response time of motors. I was wondering if there exists a motor type which is both high torque and low inductance? Or in other words a motor which ...
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Tesla AC motor: operational question with field direction

I have a question on the direction of the magnetic field for each of the four windings of the pictured AC motor. I ask because the wires are not clearly labeled as to direction of each winding, in ...
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Tesla AC motor: question on component

The following is a picture of Tesla’s AC motor patent. Does anyone know what appears to be slip rings on the left end of shaft a’ coming from generator G are for? Also, what is the function of the ...
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Problem modeling capacitor bank for Three Phase Induction Motor

I'm currently working on a simulation in Simulink and I encountered a problem. I'm using a capacitor bank to improve the voltage drop at the output voltage of the motor. The problem is the capacitor ...
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Calculating AC Unit Watts

I'm trying to calculate the watts used from my AC unit. Below I am including my sticker label that's on the AC Unit along with a electrical data sheet I found online for my model. So far this is ...
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Voltage is below 380

I am Vango from Ethiopia. Am junior electrical engineer. While working today I've faced some problem. That is when incoming voltage drops below 380 V, I mean when it is about 370 V, motor stops ...
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Connecting two DC-DC 0-200V SSRs in series

I want to switch a 400V DC inductive load. I am unable to find 0-400V DC to DC switching SSR. Can I use two DC to DC SSR of 0-200V in series to achieve the goal?
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Why would a motor have 100kW in 90kW out?

I might have phrased my question wrong but our lecturer asked us a question about why a motor (or generator I am not sure) would have 100kW in and 90kW out. He proceeded with saying that it had ...
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AC single-phase fan motor works (almost well) without start capacitor, but not with the correct capacitor connected?

I have a fan motor from a mobile a/c unit here which stopped working. It is for the fan that blows the warm/hot air trough the a/c condenser (exhaust air). 240V AC motor with a 4uF (+/-10%) 450V ...
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Under FOC control, can current sampling be removed when the inductance of the motor is small?

I have dismantled a micro coreless servo motor produced by SIEMENS and made a copy of it. Then I designed an FOC driver board using single shunt and transplant the FOC algorithm to make a position ...
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What is the relationship between 3 phase motor driving signal and its position encoder?

I have this project to add a magnetic encoder on the motor shaft that will allow speed control by utilizing a TB67B000AHG chip as a driver. I want to install 3 magnetic Hall sensors HW101 stationary ...
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How is the winding cross-induction of a 3 phases motor magnetically interact from one winding to the next?

Considering a Squirrel Cage 3 phases motor. A multi-switch receive the 3 lines of the 3Ø power L1 L2 L3 and distribute the voltage to 6 wires. The multi-switch has 3 position, Speed 1 , OFF , Speed 2,...
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model of 3 phase induction motor with asymmetric windings considering line neutral voltage

I'm doing research on modeling of inter-turn short circuit model. I looked up some papers and built the model. The current did display features of this fault, but when it comes to voltage, the issue ...
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How is power consumed by an induction motor calculated based on speed (from a VFD) and torque induced by the rotor shaft?

I've been tasked with carrying out some design improvements on my company's production floor. There is a flat belt conveyor assembly line, whose movement forward movement is controlled by a single ...
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Does a grid-connected induction generator create phase difference between the grid voltage and generated current?

I saw an answer to another question that stated: "An ordinary induction generator connected to a power grid will draw lagging reactive volt-amperes from the grid and supply real power to the grid....
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How does a variable frequency drive reduce the energy consumption of a motor?

If the relationship between frequency and current is inversed as answered in this question, how does reducing the supply frequency reduce the energy consumption of a motor?
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Why do we need to install a variable frequency drive to reduce the energy consumption of a motor?

I have read that the power consumed by a motor under various load conditions is not constant according to the answers to this question. The electrical energy input changes according to the torque ...
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What's the per phase equivalent circuit of induction motor with asymmetric windings?

We know that there's T equivalent circuit and inverse Γ-equivalent circuit for 3 phase induction motor(IM). When the IM is operating under normal situation, the windings are symmetrical, so all 3 ...
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Power factor calculation for 3 phase IM using current and voltage measurement

How to calculate power factor for a 3 phase IM with delta connection ? I can measure line current waveform and phase voltages (between each conductor and a common reference) for all three phases. ...
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Is a change-over-switch with a VFD dangerous?

We are using a variable frequency drive (VFD) with a compressor. We added a rotary cam changeover switch (600 V/50 Hz, picture is attached) in between the compressor and the motor. The purpose of ...
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Single phase induction motor does not start with long cable

I bought a single phase induction motor to build a mortar pump, the motor needs to be operated far from the power source (home construction site). The motor does not start when connected to mains ...
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Field Oriented Control for ACIM

I was working on developing software for controlling torque and speed of 3 Phase AC Induction Motors using Field Oriented Control aka Vector Control. My motor has following details as per the ...
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How does the RL series circuit model the effect of load/backemf in an induction motor?

I know how induction motor works: The rotor produces maximum backemf on no load and keeps the current to minimum. On load, the backemf reduces and the rotor draws more current. In power factor ...
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DTC Code for TI C2000 Launchpad TMS320F28069M?

Is there some link or resource for code for Direct Torque Control of 3-Phase Induction Motor using the TI C2000 Launchpad TMS320F28069M?
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What is the ABCabc model of the induction motor?

I'm doing research on induction motor parameter identification, and I found research matching my purpose, but I don't know how to build this "ABCabc model of an induction motor", which is ...
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How to make a controller for a universal washing machine motor?

I found a broken 2000ish Whirlpool washing machine called AWT4085 in a junkyard. I bought it for a school project like 'E Waste can be reused' topic. It was like 10 bucks or so. It had a lot of ...
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GFCI tripping when using hair trimmer, but only when using an extension cord

I have a GFCI socket in a recently-build bathroom. My hair trimmer trips it often when stopping under some conditions and while I have a fix I'd like to better understand what exactly is going on here....
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induction motor rotor current

I don't want a solution The solution is already given. A 575V, 60Hz, 150 hp, 0.80 power factor lagging, 2-pole, 3-phase induction motor has the following equivalent circuit parameters as seen from the ...
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Identifying the components of an electric motor

I need to calculate the magnetic field in the airgap of this electrical motor (also other things such as torque) but I'm having difficulty identifying its components (airgap, rotor and its nucleus, ...
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Difference between turns function and winding function PMSM?

What is the difference between turns function and winding function as applied in the Modified Winding Theory and how do I compute them given the parameters of a PMSM?
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Generator to run a compact industrial VFD (Sinamics V20)

I have a Siemens Sinamics V20 (0.5HP) industrial VFD (as picture), powering a 3-phase 0.25 HP electric motor. I work in the field and generator is the only way to have electric power. I am looking for ...
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How to design PI controller for the field weakening control of the three phase induction motor?

In the book called Electric Motor Control in the Chapter 8 I have found following field weakening strategy for the three phase induction motor The aforementioned field weakening strategy is based on ...
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MOSFET burns - 220V inverter for induction motor speed control using Arduino

I have been working for quite some time on my project to control the speed of a 220 V, 60 Hz, 0.35 A induction motor (domestic fan). I use an Arduino to generate 60 Hz with a switching frequency of 10 ...
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Phase angle difference between the induced EMF in the rotor and the rotating magnetic field in three phase induction motor

I have been studying the three phase induction motor and in the process I could not exactly understand the EMF generation in the rotor. From figure(2) below, it is understood that the maximum EMF is ...
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Motor run capacitor tolerance

From wikipedia: If a wrong capacitance value is installed, it will cause an uneven magnetic field around the rotor. This causes the rotor to hesitate at the uneven spots, resulting in irregular ...
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Problem with solid state relay and ac motor

I installed a circuit to automatically start a dust extractor when I turn on one of my woodworking machines. I have one 230V circuit dedicated to powering the machines and another circuit powering the ...
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Three phase induction motor connected in single phase power system

I'm trying to figure out an experiment in a lab that we did with a three phase motor connected in a single phase power supply. The schematic is as below: I measured all currents in the motor windings,...
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3 phase electric motor torque output

I am a mechanical engineer and fairly new to real life usage of electric motors. I have a 2.2 kW 3 phase AC motor. At 1450 rpm, it can generate 14.49 Nm torque (I understand this is called nominal ...
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Can someone verify my understanding of induction motors?

Here's my understanding of the induction motor, it would be really helpful if someone can verify it. 3 phase AC supply given to stator, sets up an rotating magnetic field (RMF,) \$ B \$ (discussing ...
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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 ...
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How do I size conductors to a three-phase induction motor to account for voltage drop?

Suppose I have a 480-volt nominal electrical distribution system, and a 460-volt nominal motor. Assuming +-5% variation in the source, it could get down to 456 VAC. I've seen references to motors ...
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Exciting the rotor and stator of a slip ring induction motor at different frequencies, will it develope torque?

I came across this question as I was preparing for an exam, I am unable to understand the theory behind it. The textbook says the motor can run a 600 and 2400 rpm but gives no explanation. Could ...
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