Ryobi string trimmer esc

MaxHeadRoom

Joined Jul 18, 2013
30,662
If the motor runs and the controller doesn't fry, all is good. The hall sensor to motor phase table is simple.
The physics of motor motion by attraction or responsible is a vector. If you invert the vector matrix by software or hardware timing/sequencing of position sensors, the motor runs just fine if it freely spins in both directions.
But once tuned, the position sensors or whatever method is used, cannot/should-not be changed?
 

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Lawnmowerman

Joined May 11, 2022
53
If the motor runs and the controller doesn't fry, all is good.
How long might it operate before frying? Can I go back in and test current or anything? I’ve read that spinning freely might be known as a false positive, which pulls excessive current thus frying chit. Am I somewhat on the right track?
 

nsaspook

Joined Aug 27, 2009
16,325
But once tuned, the position sensors or whatever method is used, cannot/should-not be changed?
The physical characteristics of the 3-phase motor that tuning parameters are based on are usually not directional if the motor loading remains the same. If the phase encoding by hall sensor or positional encoder is correct, (HW or SW) tuning should be the same.
 

MaxHeadRoom

Joined Jul 18, 2013
30,662
I think that is what I said?
The method I used to tune/align the commutation of encoders that posses the tracks is to back feed the motor and align the respective commutation pulse to the resultant generated sine wave. using double beam 'scope.
 

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Lawnmowerman

Joined May 11, 2022
53
I think that is what I said?
The method I used to tune/align the commutation of encoders that posses the tracks is to back feed the motor and align the respective commutation pulse to the resultant generated sine wave. using double beam 'scope.
I almost bought an oscilloscope last year for my audio hobby, if o scope is what your referring to. Didn’t fit in the budget for the very little use it’d see.
 

MaxHeadRoom

Joined Jul 18, 2013
30,662
I almost bought an oscilloscope last year for my audio hobby, if o scope is what your referring to. Didn’t fit in the budget for the very little use it’d see.
An off the shelf motor, you should not need it, but I was often replacing/fitting encoders with the comm tracks on them BLDC motors that pretty much required the need for the 'scope. ;)
it
 

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Lawnmowerman

Joined May 11, 2022
53
Nw that I’ve figured out what wire sequence is good and not drawing excessive electric I’m laying out a plan to install the 4pdt switch. I’m going to need to hook the two sensor wires to the switch and then “pipe” it back into the circuit.

Can someone tell me the name of this 5 wire connector, and if it would possibly be fairly easy to find? Maybe give a little experience on what you might do to handle the sensor wires with good reliability? 0FFFC9B4-E62F-45FB-9CEC-0F40EE916CAC.jpeg
 
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