Can anyone recommend me a way to calculate Mean Time Between Repair (MTBF) of BLDC motor. Is there a way of estimating it without the help of the manufacturer?
The engine specs are:
2 poles 21 winding
inrunner
1:4.4 transmission
76.1 mm length
27.6 mm diameter
15 Ampere
15 volt
max rpm 60k...
Can I rely on saying that the starting torque of a BLDC engine
is the multiple I_max*Kt .
I find it problematic because I am not sure BLDC controllers are entirely predictable
I would be glad for some help..
Is there anyway of predicting what will be the starting torque of a BLDC motor (BRUSHLESS DC MOTOR) without asking the manufacturer?
Can I know the starting torque by consulting the manufacturer of the BLDC motor controller?
Looking on a BLDC motor catalog for motors with the same iron there are different motor windings but similar maximum power ratings. Other than that I know the operating current, no load current, armature resistance, terminal voltage
1. Just to be sure since it has a permanent magnet the no load...
I have catalog specs for a brushless DC motor saying
[I_0] no load current @ 8.4V = 3.84[amp]
[R_a] = 0.0063
Continuous Current = 45 Amp
No. Winding = 6
Voltage= 14.8 - 18.5
max power = 700Watt (15 Sec)
Kv=5000RPM/Volt
1. Is it possible to find the motor torque constant with the help of...
A question that boggles me about BLDC poles is that I've noticed some cases of BLDC's with odd numbered poles like 9 for example, Aren't they supposed to come in pairs so the flux can always have a straight line to "flow" to, and an exclusive opposite pole?
At times BLDC are refered to as 3 phased since they carry a few poles. Creating similarity in the manner they are connected. Other than that the BLDC utilizes direct current - is it that by the switching pulses a rotating magnetic flux ensues? that doen't make so much sense since in the 3...
I understand that there's a direct connection between the number of windings on each pole and the maximum RPM the BLDC can achieve. I understand that torque is proportional to the current in the windings and since less windings usually enables enlarging the winding wire thus enabling more...
I hope anyone can help me with this. When calculating voltage drops with a cos (Phi) lets say 0.8[**see note at hte bottom]. I am not sure whether I am supposed to calculate the voltage drop like
delta V = I (R cos (Phi) + X sin (Phi))
R being the real impedance and X being the reactive...
