Thane Heins Perepiteia.

[hoptoad]

YOUR 10% FACTORS IN THE EFFICIENCY OF THE MOTOR WHICH HAS NO INTEREST TO US.

I'm sure Ryobi would be real delighted with your insinuation that their bench grinder motor was only 10% efficient.
If it was, it certainly wouldn't get any of the efficiency labels proscribed by the following (Washington USA) standards document.  Perhaps Ryobi don't sell in the USA   

http://www.energy.wsu.edu/ftp-ep/pubs/engineering/motors/EfficiencyStandards.pdf

Cheers

[CRANKYpants]

Nice pictures...
At least no one should say your are not putting 110% effort into the research build.. It will be interesting to see the results.

TEST RESULTS & SPECULATION

There are 4 E coils here and 1 "accelerator coil". I mount them in pairs for ease of testing.

Closing the air gap has increased coil power from 8.5 to 21 watts and it's only 2/3's of the way there so hopefully it continues to 51.8 watts / per coil. (The "Italian" coil went from 11 to 38 watts but it has a short inside and has to be rewound and retested). The mounting face of the enclosure has to be reinforced before we can close the air gap. I think 100 watts / coil is do-able.

All the coils are different and now I have to unwind them and rewind them all according to the best performer.

The "accelerator coil" is a HIGH TORQUE - High Voltage Coil meaning it is wound with 26 gauge wire rather than 30 gauge and only accelerates above 1600 RPM but it really kicks the rotor - you can actually hear the flux hit the rotor when it's engaged. Below 1600 RPM it is a massive brake. Ultimately there will be 4 "accelerator" coils and 4 Concentric E coils.

My friend GOTOLUC is considering building us a frequency doubler for the motor to run from 60 Hz to 120 Hz.

Thanks
Thane

[CRANKYpants]

Hi Thane,

I don’t know if this computer simulation can show “anti lenz law effect”. You are the one who gets “big head” and a lab in an University.

I WAS THINKING BACK TO MY "MOTIONLESS PLATE GENERATOR" WHERE SOMEONE HERE SAID THAT THE FINGERS BECOME MAGNETIZED AND PRODUCE LENZ EFFECTS.

THANKS BUT I WISH I WAS GETTING BIG HEAD IN THE LAB BUT I AM TOO BUSY SPINNING IN CIRCLES.

CHEERS
T

[CRANKYpants]

I'm sure Ryobi would be real delighted with your insinuation that their bench grinder motor was only 10% efficient.
If it was, it certainly wouldn't get any of the efficiency labels proscribed by the following (Washington USA) standards document.  Perhaps Ryobi don't sell in the USA   

http://www.energy.wsu.edu/ftp-ep/pubs/engineering/motors/EfficiencyStandards.pdf

Cheers

IF YOU LOOK AT THE ENTIRE "SYSTEM" AS A BLACK BOX (OR IN THIS CASE A CLEAR BOX) THEN THE OVERALL EFFICIENCY IS ONLY 10% - BUT THIS HAS LITTLE OR NO REFERENCE AT ALL TO THE MOTOR.

WE ALWAYS OPERATE THE MOTOR AT 85 OR SO VOLTS WHICH SERIOUSLY COMPROMISES THE MOTOR'S ABILITY TO PRODUCE TORQUE AND RUN EFFICIENTLY. OUR SYSTEM TORQUE COMES FROM THE HV COILS INSTEAD.

ACTUALLY WE HAVE NOTIFIED RYOBI OF OUR RESEARCH, THE USE OF THEIR MOTORS AND HAVE INFORMED THEM OF HOW STOUT THEIR MOTORS ARE - WE STILL HAVE THE ORIGINAL MOTOR WHICH STILL WORKS EVEN THOUGH THE STATOR COILS ARE BLACK, THE BEARINGS CREAKING A BIT, LABEL BUBBLING AND PAINT FADING DUE TO HEAT.

CHEERS
T

[Coleston]

Those pictures look really slick, is the coil on the spool the accel coil? How does the extra coil affect the acceleration? Faster? Did the thunk get louder?