Why multi-purpose model aircraft motor BLDC, motors instead of all-digital fuzzy?
all-digital fuzzy and BLDC differences between motors. The difference, a brief point said.
the permanent magnet synchronous motor (永磁同步电动机)Able to rotate and the stability of the power frequency synchronous speed, and is not influenced by load and line voltage. Consequently, motor, all-digital fuzzy is high precision constant speed driving ambition. All-digital fuzzy speed/torque characteristic is very suitable for direct drive high power, low speed,rpm)The load.
BLDC motor of permanent magnet motors magnetized and its spread is through selection on rotor, can make the counter electromotive force (Because of the rotor movement in stator winding induction voltage)The waveform is in the shape of a trapezoid. It was thus able to choose has a rectangular waveform of dc voltage of a rotating magnetic field to generate low torque ripple. Because a rectangle applied voltage is very brief, for example a MCU at random, maybe C2000 series DSP and 51 single chip microcomputer can happen this kind of PWM wave, so the motor control and drive to become a brief. But it is necessary to know the position of the rotor in a certain perspective, talent make aligned with the counter electromotive force in the applied voltage. Counter electromotive force and the reversing action alignment is very important. Only in this way, the motor ability as a dc motor with the highest power operation. Therefore, BLDC motor as low capital, high power motors use the best choose.
if it is all-digital fuzzy from the manipulation of the low BLDC first-class motors? No, you can also use FOC (Vector control)DTC (Direct torque control)To complete similar to the manipulation of the role and function of dc motor, but money really is very big, really not a brief algorithm.
summary: both are synchronous motor, BLDC dc supply motors, counter electromotive force trapezoidal wave; All-digital fuzzy sinusoidal current power supply, the counter electromotive force sine wave.
so: if I now have a motor, could you tell me how to distinguish which I is all-digital fuzzy, which is the BLDC? MotorsFrom the function can see come out?
function point of view is not too accurate, model aircraft motor, you can see the driver of the motor, the first power source is dc, is still a three-phase alternating current. The one is go to see the back emf waveform.
