Originally posted by HuntingRoss
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Sounds good so far...
For a single coil as we have been discussing in the recent past I would estimate it as so :
A = 'ON' angle
B = The angle of the comm segment
C = The angle of the brush
D = 'OFF' angle
E = The angle between P1 and P2
A = 'ON' angle
B = The angle of the comm segment
C = The angle of the brush
D = 'OFF' angle
E = The angle between P1 and P2
Plus, it would help if you assign a Letter to Stators Bisector Angle.
Where B + C = 'Time on brush'
Yes Mark...of course You have it right this time...since you are Not Adding BUT Subtracting the Switch ON Time on ALL your above equations.
Whilst you have not enlightened anyone on how to estimate the 'OFF' angle when designing your motor...
Mark,
Of course We don't have any difference NOW!!Now, there is one "special" issue (I will better call it "Unique") in Sampojo's 10 Pole/4 Stators and 4 Pole Single Coils:
E=BNOW LET'S VERIFY IF YOUR EQUATIONS ABOVE HOLD TRUE IN A CONVENTIONAL MOTOR:
So let's choose Imperial, since it is a Four Stator as well, except E is not equal to B
[IMG]
[/IMG]So We have Pairs P1 and P2 each engaging Four Poles:
A = 'ON' angle=
C = The angle of the brush=
D = 'OFF' angle = ?
E = The angle between P1 and P2
F=The NSB and SSB stator bisectors are D= 7
So, unfortunately finding D don't work on your above Equation Mark.
Now let's use your other Formula...:
90 - A - B - C = D
D= 90-5-13-13
D= 59
Close, but Nope...it can not be applied to a "Conventional" Motor Mark...so we can not use it as a "Universal Applicable Equation" am really sorry...just because We will have to keep "Hunting"...
Hopefully that clears up any confusion on why we don't agree.
Happy Hunting
mark
Happy Hunting
mark
Even though the negative results trying to calculate Imperial...I am still happy you are not adding switching angles...but deducting them...which I consider a step forward in our Timing Calculating Process.
Keep Hunting (hopefully very happy...
)Ufopolitics




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