Sorry, not trying to be rude. The answer is the DC electric motor will win and lift even the highest load of 135Kg. PM DC motors have inverted parabolic power curves that max at 50% efficiency and linear increasing torque curves that max at stall where max current is reached when the current is...
I already know the answer to this easy question. Just curious what people know on the internet.
A 36 volt DC electric motor, model P66SR274 is rated for 1865 watts (2.5 HP) at 2000 RPM, and its output shaft is to be direct coupled to a shaft that is 25mm in diameter. The power supply is 3X, 12...
understanding of the word "within" with regards to translation in math
I need a clear understanding of the word "within" with regards to translation in math. Like if I say integers of X is within the interval of 5 and 10. Does this mean: [5,10] (5≤ X ≤10)?? The reason I ask this is because in...
I am no expert here at all, but is there a reason why no one posted this algorithm: http://www.homeschoolmath.net/teaching/sqr-algorithm-why-works.php on square roots?? It appears to use the least amount of operations that the OP was asking for. It was used back in the days of elementary school...
Bruce, the three conditions needed for a lethal shock are a high enough voltage source, the voltage source must be able to supply enough current, and your body's resistant must be low. The body resistant will likely be low enough, but the other two conditions will have to met in order to receive...
OmCheeto, like the idea, and would probably reduce cost even more so.
FlexGunship, I sent that person a PM on what he wanted to know, but what you say is also true.
Then the alternative would be brushless DC motors which are also cheaper than High temperature super conducting motors. Surely you want to make this clean flying airplane within practical budget. The other benefit is brushless DC motors are also more efficient than asynchronous induction motors.
It also applies to asynchronous motors, but their will be slip obviously when a load is applied so the full load RPM will be less than synchronous. Even a 60HZ motor can have its frequency increased by a variable frequency drive. There is no "design" difference as you state. Some motor...
If you read the text of mine you quoted (There would be no torque if current was not induced into the rotor bars which requires slip of the rotor relative to the rotating magnetic field of the stator.) you would see I said it required slip. No slip means no current will be induced into the rotor...
Until today when you learned of high frequency designs. :smile:
There would be no torque if current was not induced into the rotor bars which requires slip of the rotor relative to the rotating magnetic field of the stator. If instead magnets were used, it would be a synchronous motor which...
sr241, since you have a interest in electric motors I recommend that you start with this book:
Electric Motors and Drives: Fundamentals, Types and Applications (ISBN: 978-0750647182 ).
Then if you want a more advance, deeper understanding, then you will need to purchase these two...
Four hundred hertz 3-phase AC induction motors have been around since before a lot people where even born that are members of this forum. All the issues of going higher frequency have been solved a long time ago when the aviation industry needed a lightweight electric motor solution. That is why...
Here is a simple solution for motor weight and is cheap compared to HTS motors. Use 400 Hertz 3-phase AC induction motors. Remember people that like a transformer, higher frequencies reduce size and weight. Four-hundred hertz motors have been used in the aviation industry for years for the...
You MUST use Kelvin Clips if you wish to have any luck at accurate measurement of low resistances. Also thermal voltages will effect the reading you get. So try to keep the temps stable and remember the current flowing through your device under test will heat it up which will generate thermal...