Questions tagged [rotor]
The rotor tag has no usage guidance.
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Do eddy currents in a rotor core of an induction motor create torque proportional to the coil current of a squirrel cage?
In a rotor of an induction motor, the core plates and wire coil conductors have non-zero thicknesses. Therefore, eddy currents non-zero too. And they approximately proportional to the coil current of ...
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Rotor types in Synchronous Reluctance Motor
I am doing research on Syncrhonous Reluctance Motor (SynRM) and the rotor used in it. I am a bit confused in their rotor types. Now according to Google, the rotor types do consists Salient Poles Rotor ...
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Motor power rotating, with weight difference
If the motor is rotating a large rotor, and the mechanical resistance increasing with rpm, will the power consumption be the same even if there is a difference in weight on the rotor during steady-...
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Why is there no torque in electric motors when the Iq current is zero and Id current is not zero?
Random vector position of stator current ( Id + Iq = Is ):
Now I draw the stator current/flux vector as shown below where “Iq = 0” and “Id ≠ 0”:
From lecture I’ve learned that the south pole of the ...
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How do I find the rotation direction of a single speed, single phase universal 120VAC electrical motor?
Specs:
5hp 16 Gallon Rigid wet/dry shop vac household type
Serial Number: 09270 R 2217
Model: WD16360
120V 10A. 60Hz
Motor:
M188306380002 09241 AD
U79-251200-001E01 120V 60Hz
PROBLEM SUMMARY:
I ...
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Post-processing for determining rotor angle of Park transformation
I have done experiments with a Sinusoidal Axial Flux Permanent Magnet Machine with electrical load, i.e. with the machine as generator. These experiments were done at a constant velocity of the ...
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Torque developed by Star Connected rotor
The current in each phase of a Y-connected rotor winding is 200 amperes. The resistance per leg is 0.003 ohm. Determine the torque developed by the rotor at a slip of 3%.
I don't understand how to ...
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Why don't I get a bell curve in the torque vs rotor position plot?
I have designed a inset PMSM. I tried to plot the torque vs. rotor position plot but I am not getting a bell curve. Like at the torque must be maximum only when theta is 90 degrees.
I don't know where ...
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Controller of BLDC internal vs external rotor
The 3-phase permanent magnet BLDC motors come in two types, internal rotor and external rotor. Mostly the external rotor types are called Hub motors as they are used in electric bikes. Both types of ...
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Why doesn't the shaft of a running induction motor cause an electric shock?
Source: learnenginering.com
Source: learnenginering.com
Source: Wikipedia.org
Source: Own photo.
Here are some parts of an asynchronous induction motor aka squirrel cage type rotor. As clearly ...
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How do I quantify the effect of stack lamination on a stator and on a rotor of an induction motor?
Image from here:
I would like to design (or to calculate the existing of) an induction motor, either 3 phases or single phase. I understand that both stator and the rotor made from a stacked-laminated ...
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How does adding resistance to a wound rotor induction motor increase torque?
I read that adding resistance to the rotor circuit causes the induced current in the rotor to be more in phase with the stator current. This produces a very small phase angle difference between the ...
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Electrical Motor filler metal for laminated stacks
Looking at several cores from failed motors some will have a filler-type material that is inside the stack of laminates. This material is almost always silvery, and it does melt relatively low, ...
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Calculate ideal unloaded rotor speed
I have the following problem:
MY ATTEMPT
Okay, I've found two formulas that will definitely help me solve this problem:
The first is \$S=\frac{N_s-N}{N_s} \$, where \$S\$ is the slip, \$N_s\$ ...
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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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