1864

Item 1864

BUY: Motor - Fullsize - Radial Flux - Inrunner - MegaFlux - MF0310 and MF0410

Specifications of the Motors:

See the hard copy pages in Electrotor-SloMo ~ Motor - Radial Flux - Specifications. It is the printout of Access database ~ Motor, Form ~ Specifications.

See the hard copy pages in Electrotor-SloMo ~ Motor - Radial Flux - Performance Spreadsheet. It is the printout of Access database ~ Motor, Form ~ Performance Spreadsheet. This has nothing on the Megaflux motors ~ yet.

Notes:

(1) xx

Requirement for Electrotor-SloMo:

Access, for hover w/ 300 GW etc. gives 6.0 hp for the momentum method and 4.1 for the blade element method. This is for a single rotor therefore the coaxial will be about 8.5 hp and 5.8 hp. This is 18 and 28 lbs / hp to hover.

The Flettner FL-282 had an effective disk area of 1,695 sq-ft and a gross weight of 2202 lbs, giving a disk loading of 1.3 lbs/ sq-ft. Somewhere it mentions 17 lbs / hp to hover.

To lift 300 lbs at 17 lbs / hp to hover (as per Flettner) will require 17.6 hp, which equals 8.8 hp per motor, for the Intermeshing configuration.

For 300 lb GW;

8.8 hp = 6,562 watts.

Amps = watts / volts = 6,562 /155 [Megaflux ------C] = 42.4 A per rotor.

Torque = 5252 * 8.8 hp / 730 rpm = 64 lb-ft per rotor.

The Allied Megaflux MF0310010 has a continuous stall torque of 15.1 lb-ft. Weight 6.94 lbs. Three = Stall torque of 45.3 lb-ft. Weight 20.8 lbs. Should allow for better cooling plus the redundancy.

The Allied Megaflux MF0310025 has a continuous stall torque of 36.2 lb-ft. Weight 15.92 lbs.

The Allied Megaflux MF0310050 has a continuous stall torque of 74.0 lb-ft. Weight 30.46 lbs.

The Allied Megaflux MF0410015 has a continuous stall torque of 56.6 lb-ft. Weight 19.06 lbs.

The Allied Megaflux MF0410025 has a continuous stall torque of 95.4 lb-ft. Weight 29.4 lbs.

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Compare with:

BUY ~ Motor ~ Fullsize - Radial Flux - Stock Fisher & Paykel, and

DESIGN: Electrotor-SloMo ~ Motor - Radial Flux - Overview - Outrunner Project

Notes:

Notes on potential revisions to and use of motor.

Consider: 2 motors for each rotor at 1/2 the desired thickness.

The two do not weigh much more than one.
They MAY offer better cooling
The will provide redundancy
This might be able to provided torque-pitch control ~ as long as both are operational.
On a 3-phase motors could the second motor be staggered by (360/6 = 60º) = 30ºelectrical degrees around from the first.

Additional Information:

See; Access database [Motor] and the printout of the 'Specifications' page.

Drawings:

MF0310xxx-x Series:

MF0410xxx-x Series:

Allied Motion - Emoteq: Megaflux Series: Currently this looks the best for full size craft.

http://www.alliedmotion.com/Products/Series.aspx?s=1 Have hard copy of 20 page .pdf file that is called up from [Document] tab on next lower level. DXF files of the 3 series are stored in the /Drawings/Obsolete folder by the names MFO...........dxf

http://openpdf.com/viewer?url=http://www.grp6.com/documents/MF_TYPE_MOTOR_INSTALLATION.pdf Storage, Handling & Installation Guide MegaFlux FRAMELESS MOTOR, Have hard copy.

http://www.grp6.com/documents/Emoteq_MF.pdf, Megaflux Series Thin Ring Torque Motors Engineering Guide, Have hard copy.

Megaflux Series:	MF0310010 - B	MF0310025 - C	MF0310050 - C	MF0410015 - C	MF0410025 - C
Peak Torque: (=/- 25%) lb-ft	74.4	194.6	381.4	239.9	390.6
Weight: lbs	6.94	15.92	30.46	19.06	29.4
Max Speed in continuous duty area: rpm	1175	775	610	x	x
Continuous torque at 1000 rpm	13	29 @ 775 rpm	60 @ 610 rpm
Pole:	48	48	48	64	64

Rotor ID: inch	9.1	9.1	9.1	10.548	10.548
Winding OD: inch	12.0	12.0	12.0	16.929	16.929

HP calculated from above ~ in continuous duty area:: ⁽¹⁾	730rpm x 16 / 5252 = 2.22	730rpm x 30 / 5252 = 4.12	610rpm x 60 / 5252 = 6.96	x	x
HP calculated from above ~ in continuous duty area: ⁽⁴⁾		- B 600rpm x 28 / 5252 = 3.20
GW/HP calculated from above: ⁽²⁾			300 lb / 2 x 6.97 = 21.1 lb/hp
HP at upper right of continuous duty area:		775 x 28 /5252 = 4.1 \| = 36.8 lb/hp	The above is at the corner

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For Electrotor ~ SloMo:

(1) Horsepower based upon the appropriate graph for each model. With the RPM set at 730 RPM.

(2) The Bad; This is based on side by side (2 x single rotor). The other configurations will have lower lift to power ratios.

(") The Good; For 300 lb GW the Momentum Method calls for 6 hp per rotor and the Blade Element Theory calls for 4.1 hp

(") The Good; With good cooling etc. it should be possible to get more power out of the motors.

(3) This gives the same power as the MF0210075 - C at 910 RPM and 150 volts but it's amperage can be taken higher/

(4) Horsepower based upon the appropriate graph for each model. With the RPM set at 600 RPM.

Comparison of MF0310025 - C to MF0410015 - C:

		MF0310025 - C	MF0410015 - C

MF0310025 - C00

HP = Q [ft-lb] * RPM / 5252 = 29 * 775 / 5252 = 4.28 hp per motor. 8.0 hp per motor is required to hover.

(4) HP = Q [ft-lb] * RPM / 5252 = 28 * 600 / 5252 = 3.2 hp per motor. 4.4 hp per motor is required to hover. HP = Q * RPM / 5252. Q = HP * 5252 / RPM. Q = 4.4 * 5252 / 600 = 38 ft-lb, 4.4 hp = 3.28 kw. A = 3280 / 150 = 21.9 A. See; Advanced Motion Controller B100A 40AC or smaller

This appears way to under-powered even though it is from Prouty's calculations.

MF0310050 - C00

HP = Q [ft-lb] * RPM / 5252 = 60 * 610 / 5252 = 7.0 hp per motor. 8.0 hp per motor is required to hover.

MF0410015 - C00

HP = Q [ft-lb] * RPM / 5252 = xx * xxx / 5252 = x.x hp per motor. 8.0 hp per motor is required to hover.

Notes:

Cooling:

Consider releasing recompressed air onto the coils. The expansion of the air should help cool the coils. Will this cause moisture to effect the motor detrimentally, or, might the moisture help cool the coils.

See; DESIGN: Electrotor-Simplex ~ Power Train - Motor - Cooling

Cogging: Pascal says that a cogging torque of 0.72 lb-ft is not big enough to be a problem.

Application Page: DESIGN: Electrotor-SloMo ~ Motor - Radial Flux - Overview - Allied Motion

Mounting Holes:

Series:	Count:	Dia, Inch	Dia. mm	Bolt?	Hole dia. mm Close fit	Hole dia. mm Normal fit
MF150	9x	0.205 ⁺/_- 0.002	5.20 ⁺/_- 0.05	5M	5.40	5.80
MF210	12x	0.173 ⁺/_- 0.002	4.40 ⁺/_- 0.05	5M	5.40	5.80
MF350	9x	0.213 ⁺/_- 0.002	5.40 ⁺/_- 0.05	5M	5.40	5.80
MF450	8x	0.252 ⁺/_- 0.002	6.40 ⁺/_- 0.05	6M	6.40	6.80
MF550	15x	0.331 ⁺/_- 0.002	8.40 ⁺/_- 0.05	8M	8.40	8.80

The Megaflux instructions mention metric bolts for the encoder and there is no mention of imperial volts anywhere. This maybe because the threads will be in the machine to which the stator and rotor are attached.

Additional Information:

See; Access database [Motor] and the printout of the 'Specifications' page.

Last Revised: December 24, 2011