Current calculations in generator

MisterBill2

Joined Jan 23, 2018
27,514
If the system is 1KW, 12V generator system, then the current generated is 1000/12= 83.3 Amps. Am I correct?
If it is a DC system that is it. Just as simple as it looks.
BUT, If it is an AC system then power factor and RMS versus peak versus average may enter into the calculation.
But when you are considering the reverse, as in an inverter type of device, it is vital to recall that 1000 watts out takes quite a bit more watts in.
 

MisterBill2

Joined Jan 23, 2018
27,514
If it is BLDC motor calculations are straight forward. Am i correct?
A brushless Direct Current motor is not a generator. It is a motor with electronic commutation, switching on different windings as the position of the rotation of the armature progresses. Unlike a commutator-switched motor, it is not a bi-lateral device, meaning that it does not automatically serve as a generator when it is driven. Some control systems would function that way, but most BLDC motor controls do not.
A generator is usually defined as a device intentionally designed to convert motion, usually rotary, into electrical current. An automotive alternator, with the internal diodes, is a generator.
 

MaxHeadRoom

Joined Jul 18, 2013
30,659
A brushless Direct Current motor is not a generator
The Fisher-Paykel is one specific kind, quite a bit different from a lot of others. My comment applies to "most" but not to all.
But that was a typical example, as most are P.M. now, and will generate when rotated..
Max.
 
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