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Why are AC induction engines for electric cars so expensive?

I was reading about electric car engines and from what I've read there are 2 types available, DC brussless or AC induction ones. Each has its advantages and disadvantages but it seems the AC induction ...
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0answers
47 views

Starting torque in a wound-rotor induction motor

From what I've read, an advantage of wound-rotor motors over squirrel-cage motors is higher starting torque. The only explanation I've found is that the resistors increase the rotor's power factor, ...
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32 views

Calculating FLA, LRA, SFA when ReRating 3 Phase AC Induction Motors

How do you calculate full load amps, safety factor amps, locked rotor amps and no load amps when rerating a motor? For example, if I have a 3 HP, 1800 RPM, 575 Volt electric motor that I want to ...
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1answer
54 views

High current drawn by 3 phase 90 KW Induction Motor during the last part of batch mixing in a toilet soap making factory. [duplicate]

I am currently dealing with a problem of high current drawn by a 90KW three phase induction motor towards the end of the batch mixing process for a toilet soap factory. The no load current is around ...
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0answers
76 views

High current drawn 3 phase induction motor : 90KW motor

I am currently dealing with a 3 phase induction motor which is drawing very high current and the system gets tripped very often. I have checked the mechanical load by reducing it and then calculating ...
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3answers
1k views

Why do refrigeration compressors stall when switched off and on quickly?

All of the air conditioners I've worked with have the following words on them: Before restarting, wait three minutes. In the event the air conditioner's compressor is switched off and back on ...
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0answers
32 views

What happens if we touch winding on the stator of 2-phase induction motor

What happens if we touch winding on the stator of 2-phase induction motor when supply is ON? Do we experience electric shock? If yes why?
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0answers
206 views

How well does a Variac work for fan speed control?

I would like to run a standard multi-speed desk fan at a lower speed than its minimum setting. On Amazon, one reviewer recommended a variac for fan control, saying that it could adjust the fan from ...
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0answers
19 views

How is it possible to simulate the predefined IM motors in MATLAB/Simulink with a delta connection?

The default of stator connection of induction motors in Simulink is Y. I'd like to have Delta connection; however, this option has not been defined there.
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2answers
1k views

Is the rated speed of an induction motor the synchronous speed?

E.g, if a motor is rated at 50Hz, 400V, 22A, 8.29kW, and 1460 rpm, does this means that the motor should be operated from a source voltage of 50Hz, and this corresponds to a synchronous speed of the ...
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2answers
183 views

Why my single-phase induction motor's velocity decreases after 100Hz?

I have made a single-phase inverter with control V/F using Freescale S08P and IRAMS. However when the frequency of 100hz passes the motor decreases the velocity. Some problem with my system or V/F is ...
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2answers
756 views

Shaded pole motor coil calculation, rewind 110v motor to 220v

I have yj61 series motor. Something like this It's rated AC120V 60Hz 3000RPM and was damaged by accidental connection to 220v mains. I can't find suitable spare motor, so I have to rewind this one ...
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3answers
103 views

Power factor meaning on induced motor

Let say A 440-V 60Hz three-phase star-connected four-pole induction motor developed 10 hp at 1745. The input power is 10kw at 0.85 lagging power factor. the no load input power is 0.6kw My ...
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2answers
105 views

Circuit of a Rotor on an Induction Motor

Here is an equivalent circuit of a rotor on an Induction motor: Can someone explain How do we arrive at this circuit? The rotor seems to be only a disc(made of a metal) with conductors embedded ...
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0answers
101 views

Developed torque and starting torque concept

This is induction motor concepts I see the developed torque equation and starting torque equation What is the difference between those two ? I want more conceptual approach not just equation
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1answer
392 views

Induction motor full load and no load test meaning

Why we doing the full load and no load test for induction motor What is the purpose ? and can you provide some example? Why we doing the full load test and find power and stuff and also for no ...
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1answer
288 views

What does the speed of regulation mean?

Let's say an induction motor speed is 1150 RPM and no load condition is 1185 RPM. How do we find the regulation speed? What does regulation speed mean in relation to an induction motor?
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2answers
262 views

Induced motor slip speed stator and slip difference

This is an induced motor question. What is the difference between 'synchronous speed of the stator field' and 'the slip speed of the rotor'? If you know the equation that would also be appreciated.
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1answer
106 views

Frequency of the rotor current

This is induced motor question Let's say a three-phase induction motor is rated 50HP, 480V, 60Hz and 1150 RPM. developed torque frequency of the rotor current Is developed torque mean initial ...
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2answers
340 views

Induction motor simple power and torque

The output power is 100hp and slip is 0.02 and efficiency of 90%,4 pole induction motor Want to find the shaft torque(output torque). So I guess to find the torque we use the equation P(out) = ...
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0answers
485 views

What's the theory behind speed control of a multi-tap multi-pole induction motor?

Ceiling fans are an application of multiple-pole capacitor-run/permanent split capacitor induction motors, and they appear to control the speed through a partially powering and shunting multiple-tap ...
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1answer
88 views

Getting experimental motor data for AI based fault diagnostic scheme

I am working on a personal project, which is an AI based induction machine fault diagnostic scheme. I do not have the required funds to purchase the hardware, i.e. the motors and data acquisition ...
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2answers
94 views

What are the factors that decide where to use what motor? [closed]

What is the basic difference between single phase motors, three-phase motors, brake motors, synchronous motors, asynchronous motors, Induction Motors, etc.? What are the factors that decide where to ...
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2answers
352 views

Dead time effects Of IGBTs

I'm working on a project to control single phase ac induction motor in which I planned to use two IGBTs, one for switching the PWM to the motor (for AC chopping, PWM frequency is fixed @16khz) and one ...
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3answers
584 views

drive 3 phase induction motor with only DC (not pwm) thru each phase

I've been researching making a driver for a 3 phase induction motor powered by DC source using PWM to approximate sine waves in each phase. However, the switching speeds of the PWM signal for the ...
2
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1answer
362 views

3 phase induction motor with one phase [duplicate]

Possible Duplicate: 2 Phase to 3 Phase conversion Is there a way to run a 3ph induction motor with one phase . Basically I have 3ph motor but my power supply is only 2 phase . Is there ...
7
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3answers
9k views

Control differences between ac induction motor and brushless dc motor?

I have a fairly solid background in industrial AC motor control (soft starters, VFDs, etc.) but something that I'm certainly NOT well versed in is brushless DC motors... the type found in every hard ...
7
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3answers
5k views

Single-phase to 3-phase conversion

I have seen some boxes (with some capacitor circuits inside) which do single-phase power supply to 3-phase power supply conversion. The problem with them is that they cause the load motor to heat up, ...
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4answers
1k views

What is the slip factor for an induction generator in an island network?

Most textbooks covering induction machines cover only the motor use-case scenario. When the machine is used as a motor, the slip factor is determined by the frequency of the stator current by the ...
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1answer
417 views

Soft Starter Sizing for No Load Testing of Motors

Don't know if this would be more appropriate on any other stackexchange site but my question is : How do you evaluate the sizing of a softstarter for no-load testing of an induction motor ?? For ...