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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28 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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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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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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Can a battery inverter with a load reactor allow it to run loads with high inrush or surge currents?

I have been trying to figure out how I can run a 120V/240V 1/2hp pump or a 240V Square Wave TIG 175 Pro with a 5000 watts split-phase inverter with peak of 6500 watts. It can start the pump with ...
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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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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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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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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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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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55 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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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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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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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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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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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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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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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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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
52 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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How was ceiling fan speed controlled before the invention (or availability) of Triac?

I am interested to know about the circuit diagram of the ceiling fan regulators of the old days (when Triacs were not available). I have searched on google but all of the results were related to SCR. ...
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51 views

Is this motor humming because of a short circuit?

I disassembled my vintage grinder to grease the bearings, on reassembly it hums when the switch is turned on. The centrifugal switch appears to be functioning normally. The only possible aberration to ...
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How can there be 8 pole trifasic motors? Shouldn't poles be a multiple of 6?

How can there be trifasic motors with a number of poles non being a multiple of 6? I'd imagine poles in such motors would be 6 or 12 etc.
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How to control one motor with two float switches

I have 2 tanks , one is under another and hopes to pump from under tank to upper one using a 0.5 Hp single phase motor.By connecting float switches for both tank,can I control the motor to turn on ...
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37 views

Induction motor starting torque and pull out torque

Recently I was doing some work on the induction motor where I found some general theory on starting speed torque curve of the induction motor. Where the theory is the starting torque will be 1.5x of ...
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Cooperation of the ADC and PWM modules

I am going to implement field oriented control of the induction motor on Zynq 7020 SoC. My idea is to use the integrated ADC module (XADC) and implement the PWM modulator in the FPGA. I need to have ...
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welling yxb-250-4 induction motor spin start direction is inconsistent

This motor is also often referenced as W11283592. The best pictures of it are in http://www.gmcc-welling.com/Homeen/Product/detail/id/187.html and https://partsdr.com/part/w11283592-drive-motor. The ...
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Transition between two pwm modes

I am going to implement on mcu following pwm for three phase voltage source inverter controlling the induction motor. The pwm will have two operation modes: 01) asynchronous mode where a/d ...
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50 views

PWM for three phase induction motor control

I have been implementing control software which shall control the three phase voltage source inverter for controlling the induction motor. There are two requirements as far as the pulse width ...
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35 views

Rotating magnetic field discrepancy

This may be a noob question Lets consider a balanced 3 phase supply namely \begin{align} R&= V \sin(x)\\ Y&= V \sin(x-120)\\ B&= V \sin(x+120) \end{align} At a neutral point we would ...
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45 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 ...
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Is the resultant field of a three phase wound stator always two pole?

Suppose I have a stator, where I've allocated one coil for each phase and I supply a balanced three-phase supply. So the fields, $$B_r = B_{max}\cos(\theta_{mech})\cos(\theta_{elec}) \\ B_y = B_{max}...
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electric motor diagnostic and troubleshooting

I put my hands on vintage Dewalt radial arm saw. from the radial arm saw community its probably manufactured on the 40's. The motor is single phase and connected to 220V (this is the default line in ...
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48 views

System that does not work

Hello, i build a system which suppose to run speed control of electric engine, with loginc of Raspberry Pi. Control Signal does not go through SSR. System Connection Logic: (1) RaspberryPi 3 -> (...
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Induction motor field oriented control software timing

I have studied several application notes and technical literature regarding field oriented control of three phase induction motors. Based on that I have encountered that there are two main approaches ...
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The effects on torque/slip when changing speed?

I know that the number of poles altering frequency and voltage changes the speed but I don't know how either alters the torque or slip.
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A device to protect an induction motor?

I need a device that can protect a 3–phase induction motor from high currents and overheating.
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Induction motor: T-Slip Characteristics look weird

I was recently doing a first-course lab on Induction Motors. We were asked to plot the torque-slip characteristics of a 4-pole 3 phase induction motor (3.7kW). I just analyzed the data I plotted from ...
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External Cage AC Induction motor

AC Induction motors use an internal squirrel cage with skewed bars for the stator... However no matter how hard I look around on the internet I cannot find an external-cage AC induction motor design, ...
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To control motor : 1phase, 230 V brushless, via RaspberryPi

Is there any preferable or possible way (i am still recognizing the borders), To have set of equipment, where we would have 1phase, 230 V brushless electrical motor, (with the ventilator on the shaft)...
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U-Shaped Electromagnet Configuration for a motor?

I've been thinking about motor designs and where all the power goes for an electric motor, especially in terms of used/unused power. I noticed that in most motor designs, the neodymium magnets float ...
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43 views

Maximum temperature of an electric motor and proper cooling system

I have found an electric motor in my home and I want to estimate how much time it can operate until its temperature becomes too high and eventually build a cooling system for it (I have seen that ...
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49 views

Using a 3-phase Transformer After a Variable Frequency Drive for Voltage Reduction

In the plating industry generally 42V - 3P motors are used to rotate the barrels that hold the products to be plated. This is because the contacts of the barrel cannot be isolated (because barrels are ...
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AC Motor Induction Diagram

I have a question with the following information "AC motor connected in series to 400v RMS, 40A RMS, pf = 0.707" It wants me to draw a diagram, my question is: Can I model the motor as a single phase ...
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58 views

Troubleshooting AC motor brake

I am trying to fix a brake on a mitre saw. I am yet unsure of its operating principle. The switch (shown taken apart) has one terminal on the left side with grey wire going to the motor housing, and ...
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38 views

Slip Frequency Factors In Indirect Field Oriented Control

I am attempting to configure a asynchronous motor with a IFOC drive. I have an encoder on the motor, however I have been struggling with getting the drive parameterized to operate correctly. My ...
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4answers
119 views

minimum-working example for schematic diagram of a compressor

CONTEXT My son recently noticed that the lights dimmed when the refrigerator turns on. This question has been posed elsewhere [1]. The responses in [1] do not meet my needs. In my humble opinion, ...
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Developing Sensorless FOC PMSM code from Sensored FOC ACIM

Recently I worked on a project to develop field-oriented control (FOC) for AC Induction Motor (ACIM) with Encoders giving the position feedback. Using the same algorithm, my next project is to ...
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63 views

reactive power in induction machine

Does an induction machine actually consume reactive power?
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Difference between nominal operating point and optimal operating point of induction machine

I am trying to draw Heyland drawing for an induction machine where it is said that the nominal operating point is equal to the optimal operating point. I am confused about the difference between the ...

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