1864

Item 1864

BUY: Motor - Fullsize - Radial Flux - Megaflux Brushless Torque Motors

Drawing:

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:	MF0210050 - C	MF0210075 - B	MF0210075 - C	MF0210100 - C	\|	MF0310010 - B	MF0310025 - C	MF0310050 - C	MF0410015 - C	MF0410025 - C	MF0510015 - C
Peak Torque: (=/- 25%) lb-ft	225.5	337.2	337.2	447.7	\|	74.4	194.6	381.4	239.9	390.6	598.6
Weight: lbs	16.79	24.81	24.81	32.76	\|	6.94	15.92	30.46	19.06	29.4	21.48
Max Speed in continuous duty area: rpm	1275	910	1200	1000	\|	1175	775	610	x	x	x
Continuous torque at 1000 rpm	25	38 @ 910 rpm	40	50	\|	13	29 @ 775 rpm	60 @ 610 rpm			45 @ 450 rpm
Pole:	32	32	32	32	\|	48	48	48	64	64	80
					\|
Rotor ID: inch	5.9	5.9	5.9	5.9	\|	9.1	9.1	9.1	10.548	10.548	15.315
Winding OD: inch	8.1	8.1	8.1	8.1	\|	12.0	12.0	12.0	16.929	16.929	21.063

HP calculated from above ~ in continuous duty area:: ⁽¹⁾	730rpm x 26 / 5252 = 3.61	730rpm x 40 / 5252 = 5.56	730rpm x 43 / 5252 = 5.98	730rpm x 53 / 5252 = 7.37	\|	730rpm x 16 / 5252 = 2.22	730rpm x 30 / 5252 = 4.12	610rpm x 60 / 5252 = 6.96	x	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 5.56 = 27.0 lb/hp	300 lb / 2 x 5.98 = 25.1 lb/hp	300 lb / 2 x 7.37 = 20.4 lb/hp	\|			300 lb / 2 x 6.97 = 21.1 lb/hp
HP at upper right of continuous duty area:		910 x 38 /5252 = 6.6 \| = 22.7 lb/hp ⁽³⁾	1200 x 38 /5252 = 8.7 \| = 17.2 lb/hp				775 x 28 /5252 = 4.1 \| = 36.8 lb/hp	The above is at the corner

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.

MF0210075 - B00

HP = Q [ft-lb] * RPM / 5252 =

MF0210100 - C00

HP = Q [ft-lb] * RPM / 5252 =

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.

Notes:

Weight:

The above motors might be made stronger and lighter if the magnets are Halbach and the backing of the magnets is a composite construction.

Alternatively ~ The above motors might be made stronger and lighter if the magnets are Halbach and the backing of the magnets is a large vained aluminum backing that helps in the cooling of the magnets.

Cooling:

Consider releasing recompressed air onto the coils. The expansion of the air should help cool the cools. 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

Last Revised: February 25, 2010