$begingroup$ I've under no circumstances seen a brushless DC motor with three wires related within a delta, and that is unnecessary when you consider it. I would suppose 3 wires means Y configuration with the middle not obtainable, but not surprisingly the datasheet is the appropriate place to get this info from.
The majority in the operate is completed by these, and you will nonetheless get rather smooth torque without having PI loops $endgroup$
Commonly, nonetheless, you commutate a brushless DC motor optimally, much like the mechanical brushes would seek to do. This implies keeping the magnetic field at ninety° from the current placement from the path of sought after rotation.
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This wastes loads of Power, mainly because it generates no torque Until the load tries to flip outside of position, but it surely does stay away from the need to have for just about any feedback mechanism.
$begingroup$ The 24 N.m determine implies a mechanical energy output of 1930W and efficiency of only 32%, which can be Significantly also reduced When the motor is anywhere in the vicinity of 81% productive at 140A. The mistake may very well be brushless DC motor as a consequence of an incorrect assumption about section recent. Motor present is only similar to controller enter latest if the motor is acquiring whole input voltage. If the controller boundaries recent by lowering motor voltage (which is apparently the case here) then the motor present will be better than the supply present-day. Why? Ability = voltage x present. Since (assuming negligible controller decline) enter and output energy are equivalent, as output voltage is lowered so output latest ought to maximize by a similar ratio.
This course of action seems elaborate for me so I would want to know when there is any smarter electronic Remedy.
$begingroup$ I bought a brushless DC motor on ebay that contains a controller. It has 5 wires.
While you rise in rotor velocity the displacement ability aspect boosts as the $jomega_e L $ vector length improve with regards for the $V_ bemf $ and also the IR vector. This purely natural rotation regarding where by The existing shall micro motor be injected takes place given that the Id component is saved as near zero as is possible (causing an increasing Vd phrase).
As for the performance, I have calculated The present and Voltage on a stalled motor. That gave me twenty% drop in power. $endgroup$
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My comprehension (which almost certainly desires correcting) is that the only target of FOC is to figure out the torque and pace induced section offset in between the voltage and latest which can be a result of the windings' inductance and again-EMF.
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