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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How do I power this 400V motor from 230V? [closed]

I just bought a lathe with a motor that used to be connected to 3 phase 400V. I am trying to power it using single phase 230V domestic mains. I understand that I can use a VFD to provide the extra ...
McClaw19's user avatar
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Equivalent Circuit of Induction Motor

To find the equivalent circuit of the rotor side of an induction motor, the resistance and the reactance changes to ensure that the current in the rotor remains the same, whilst removing the slip term ...
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How can I choose the right stabilizer for a 3-phase 415 V supply system?

I have a question about how to select the right capacity of voltage stabilizer for a 3-phase supply system. That system has the following type of load and capacity: Two 1 hp 3-phase motor, 440 VAC (...
Bhushan Waghe's user avatar
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PSC motor auxiliary winding current at full speed

In articles, e.g. here, I often find this statement: In an auxiliary winding, a counter EMF is produced as the speed of the motor increases, and this EMF will limit the current that passes through ...
monorfolk's user avatar
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0 V across motor capacitor terminals, but resistance is 20 Ω. Is the capacitor dead?

It is a 36 μF, 440 VAC, 50 Hz rated motor running capacitor, used in a single-phase motor. AC source is 240 V, 50 Hz. The motor has stopping working. I want to know whether it is due to a faulty ...
Cinverse's user avatar
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How to find out whether capacitor is the fault for failed single phase motor?

Single phased motor rated for 220V, 50Hz isn't working. I want to know whether is it just due to a failed capacitor or is the motor itself is damaged. The capacitor looks clean from the outside; no ...
Cinverse's user avatar
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Turn on control of antiparallel SCRs to pass AC

If you are trying to pass an AC signal through antiparallel SCRs (there to isolate the signal when required) where the AC frequency is low enough to satisfy the turn-off time requirements during the ...
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Single-phase induction motor: torque under increased frequency and same supply current

Consider a single-phase induction motor. What will be the torque of this induction motor, if we increase the supply frequency 10 times and the motor uses the same supply current? Let's say torque (...
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Electrician Theory: Delta Star Induction motor question

This is the question I am trying to solve: A delta connected fully loaded induction motor draws 90A from a 400V supply when started direct online. Show by calculation the current at start up that the ...
Claude Leicher's user avatar
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What is the consideration when installing or replacing the shaft of an induction motor?

Here are two picture of my washing machine's motor. I am not sure whether you still have such that machine in your country. It is a top loading washing machine's washing motor (a another smaller one ...
AirCraft Lover's user avatar
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For vector control inner loop Iqs & Ids, how to match with the per-phase equivalent circuit currents of induction motor in real?

Although I can understand both of the diagrams above, I am confused about the relations between them. As marked in the per-phase equivalent circuit of a 3-phase induction motor above, we assume the 3-...
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How to calculate the power of an induction motor as in the picture?

Here is motor of an washing machine. As shown in the picture, it is a 220VAC/50Hz, 135W, and 1.3A induction motor. There are voltage, power, and the current. What I understand about how to calculate ...
AirCraft Lover's user avatar
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Can a 3 phase Induction (squirrel cage) motor generate electricity?

I am thoroughly confused again. I am at the point of relegating electricity as a black box, a mysterious phenomena I'll never comprehend. I just saw a YouTuber build an elaborate water mill for ...
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If the chassis is at high potential and a human touches it, will he get shocked? The proposed circuit is for the cancellation of CM current

This circuit is compensating the potential difference between the chassis and motor so the bearing current or leakage current cannot flow from motor to chassis to ground. If the chassis is at a high ...
Awaisha memon's user avatar
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Can I make an inductor rated 75mH 40A from an induction motor?

For my test bench, I am trying to implement an inductor that meets the requirements below. I have tried to purchase it outright as a made-up item, or the parts to make it (core and windings), but ...
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What happens when a three phase motor designed for delta connection is run star-connected? [closed]

What happens when a three phase motor designed for delta connection is run star-connected?
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Traction characteristic of the three phase induction motor

I have found a datasheet for a three phase induction motor intended for the traction applications. Among other information there was a below given traction characteristic . Unfortunately I am not able ...
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I want to replace PID by linear quadratic regulator to control the speed of induction motor fed by Voltage Source Inverter under V/f scalar control

Can I just use the simplified scheme of constant v/f speed control (the open loop system) to design the linear quadratic regulator? I intend to use the Matlab command ...
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Capacitor value for this motor [duplicate]

I have the motor in the picture. In the triangle connection, what is the cap-s value in order to get it running ok? Same, is there any formula / calculus for this situation (triphase motor running on ...
Pilgrim's user avatar
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Water turbine generator

I have a 5.5 hp 3-phase induction motor, 440 V, 60 Hz, 1760 rpm attached to water turbine wheel that I would like to utilize as line source for home power generation. May I know the additional circuit ...
Fermin C. Rivas's user avatar
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Why are induction motor cores laminated to prevent eddy currents?

The permeable iron alloy cores of induction motor rotors are formed from thin laminated sheets, designed to prevent eddy current flow and thus "reduce losses", but isn't the whole point of ...
PersonWithName's user avatar
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3 phase motor in Steinmetz connection on a single phase supply direction change problem

I want to run a 3 phase induction motor on a single phase power supply. I'm aware of the low operating power & low starting torque in this configuration. My load & duty cycles are also not big,...
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Firing TRIAC / AC Light DIMMER module

I am currently testing the AC light dimmer with a blower fan output that has a specification of 220V 0.45A. When the trigger angle is set to 0, why does the output of the AC light dimmer allow a ...
Angga Amalul Ahli's user avatar
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Single phase induction Motor starting capacitor not disconnected

I have studied the single-phase induction motor and have a little confusion regarding it. I have seen many people using a switch with the phase shift starting capacitors so that after the start the ...
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SVPWM board testing for design and development [closed]

I am trying to test the current feedback of my SVPWM board. For safety, I am thinking of connecting a light bulb instead of a PMSM motor. One incandescent light bulb across the U-V phase and nothing ...
Syed Kumayl Raza Moosavi's user avatar
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Does a permanent magnet AC motor use reactant power?

I'm learning about reactant power in school, I one thing I was told is reactant power is used to create the magnetic field and induction motor needs. Does this mean that a permanent magnet AC motor ...
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How to calculate the power of a DC shunt generator?

How much power a DC shunt generator can generate if it was coupled with this induction motor: Induction motor: 3-phase / 400v / 50Hz / 600w / 1250RPM DC generator: Excitation voltage: 0-220VDC ...
Shamooooot's user avatar
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How to calculate the values and ratings of wound Induction Motor Rotor Resistance Starter resistors?

How to calculate the values and ratings for the Rotor Resistance Starter resistors? Motor specs: 3 Phase 400V 1/2Hp 4 Pole 1750rpm Y connection
Shamooooot's user avatar
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Is my relay logic practicable?

I am trying to apply relay logic to control my machine. The schematic is as shown. 'R' is a relay. Please note that my schematic symbols may not be the symbols used in industry. Wanted outcome: ...
Burak Demirelli's user avatar
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Unknown motor with continuity across all windings. Help identify star vs. delta

I'm converting an old milling machine (Optimum F40E) machine to be driven with a VFD, and I have it working. The head is a geared head, and with correct settings (torque compensation) in the VFD I can ...
Lee Hambley's user avatar
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VFD parameter calculation for 3 phase motor

I have a small (¼ hp) motor that am going to hook up to a VFD. The VFD is programmable, and I'm planning to run the motor at 16-65 Hz with ∆ configuration. The question is: what is a good ball park ...
KristoferA's user avatar
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Is it possible to determine the number of magnetic poles inside of an induction motors just by looking at coil windings and their respective phases?

This is in regards to a 3-phase induction motor. As far as I understand, if inside of the stator of an induction motor we have 6 windings (each 60 degrees apart geometrically) and opposite windings ...
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How is Power Distributed In This Case?

I have been reading the working of induction motor, where I came across Torque-slip characteristics where the equation of torque was determined to be (refer figure). In the derivation the power lost ...
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Is this the correct setting of short coil pitch configuration?

So I tried to visualize 12 slots 2 poles induction motor and I used a coil pitch of 150 degrees as is the convention. Each pole will use an interval of 12/2=6 slots. 6 slots is a complete electrical ...
İbrahim İpek's user avatar
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How can a failed furnace blower motor damage other equipment on a shared neutral? [closed]

Story time: Last week my furnace failed. The blower motor run capacitor went toast, so the motor wouldn't spin. The furnace is on a multi-wire branch circuit and shares its neutral with the basement. ...
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How to understand the induction motor datasheet?

I have got the below given datasheet for a three phase induction motor and I have been attempting to understand its content. For me only the last column named continuous point A is clear - it ...
Steve's user avatar
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Architecture for a virtual 3-phase motor

I would like to construct an electronic virtual 3-phase motor for testing VSD/servo drive systems in the workshop, where the actual motor is not available for testing (e.g. because it is on a running ...
Cliff Pennalligen's user avatar
1 vote
1 answer
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How to use the equivalent circuit of an induction motor?

I have met a data sheet for a three phase induction motor intended for the traction applications. The data sheet contains below given table I have chosen the column operating point - continuous point ...
Steve's user avatar
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How does this single phase induction motor run without capacitor?

The motor of the picture has no facility to connect capacitor. The phase and neutral is directly connected to winding. It works fine on 220 volt 50 Hz AC. Although performance get poor at 190 volts. ...
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How to compensate inverter nonlinearities in feedback manner?

I have implemented the direct field oriented control of the three phase induction motor. The control algorithm exploits a speed sensor and machine model based on the Luenberger state observer. The ...
Steve's user avatar
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6 answers
203 views

How to measure table saw torque and horsepower?

I have a table saw that has the following rating: 120V at 60Hz standard 5/8" arbor I took the following measurements to see how they compared with the ...
Brian's user avatar
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Loading an induction machine after starting unloaded

I work with compressors and usually the starting characteristic for fixed speed machines with starters is that the machine starts unloaded (star starter), after that the compressor unit is loaded and ...
Blacklist007's user avatar
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Switch Current Rating vs Inductive Motor Power Rating

I've got a single phase inductive motor rated at 1.1 kW, 220 - 240 V, and 7.1 A. Can I safely connect this motor to a WiFi switch rated to handle 100 - 240 V and 10 A? Clearly the switch can handle ...
astronautgravity's user avatar
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How to model the dc link voltage dynamic of the inverter fed induction machine drive in braking mode?

I have been attempting to find the differential equation describing the dynamic of the dc link voltage of the induction machine based electric drive in braking mode. I have started with the energy ...
Steve's user avatar
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Why is impedance divided by 3 for an induction motor?

A 50 Hz, 5 pole pare, 400 V (line-to-line), star-connected, 585 min-1 squirrel cage induction machine has the following resistance and reactance per phase (referred to the stator): R1=0.5 Ω R’2=0.7 Ω ...
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How to define the rated efficiency of an induction motor

I have a bunch of pictures of motor nameplates (all 3 phase induction motors) and I've been asked to report the rated efficiency of each motor. At the beginning I was doing: $$\eta_\text{rated} = \...
Francisco's user avatar
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2 answers
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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 ...
Robert Lee's user avatar
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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 ...
Ekene Ginikachi's user avatar
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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 ...
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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 ...
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