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0
votes
2answers
142 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 ...
1
vote
2answers
307 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 ...
0
votes
3answers
83 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 ...
0
votes
2answers
83 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 ...
0
votes
0answers
60 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
0
votes
1answer
197 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 ...
1
vote
1answer
128 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?
1
vote
2answers
90 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.
0
votes
1answer
87 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 ...
0
votes
2answers
141 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) = ...
1
vote
0answers
252 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 ...
-2
votes
1answer
73 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 ...
-3
votes
2answers
90 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 ...
1
vote
2answers
275 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 ...
0
votes
3answers
396 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
votes
1answer
264 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
votes
3answers
7k 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 ...
6
votes
3answers
4k 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, ...
3
votes
4answers
887 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 ...
1
vote
1answer
355 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 ...