My Airplane
My Radio Installation
M Battery Box
Solar Option
350 milli amps in Fun Sun. But it doesn’t charge in cloudy conditions
STC’d Generator Option
BPE 14 Turbo Alternator STC’d
6 Amps @ 85 mph Internally regulated
Weighs approximately 5 lbs. $ 795.00 plus shipping
My Wind Powered Generator
DC Motor
A Typical DC Motor
Muffin Fan
Readily available Inexpensive Light weight Easy to mount
Brushless DC Motor
Stator Commutator Circuit
R/C Bruchless DC motor
1.4 inches in Diameter 3.6 ounces 14 volt tolerant winding Very high current winding $50
-
+
+
-
S N
N S
Brushless DC Motor
-
+ +
-
S N
N S
Brushless DC Motor
S N
N S
-
+ +
-
Brushless DC Motor
-
+ +
- 0
Brushless DC Motor
-
+ +
-
Brushless DC Motor
-
S
N
N
S
+ +
-
Brushless DC Motor
-
+ +
-
Brushless DC Motor
-
+
+
-
Brushless DC Motor
N S
S N
-
+ +
-
Brushless DC Motor
N S
S N
-
+ +
-
Brushless DC Motor
-
+ +
-
N S
S N
Parallel Connection provides higher Current capacity
Brushless DC Motor
N S
S N
-
+ +
-
Series Connection provides higher voltage
Brushless DC Motor
Brushless DC Motor Stator
Brushless DC Motor Stator
Modified Motor Stator
My Wind Powered Alternator
13.8 volts output 250 milli amp current limit About 15 hours of flight time so far
The Rectifier and Regulator
• Rectify AC to DC • Regulate Voltage about 14.5 volts DC • Monitor to display Voltage or Current
optional
Metering (optional)
R1
240 ohm400uF
50 v
AC LM317
Regulator
R2
2.6K ohm
R3
100 ohm R4
1 ohm
1 watt
D5
1n4007
12 volt
Batery
To be
charged200 mv Meter
Battery
9 v 14.50
SW1
ON/Off
0.000
00.00
Current
Voltage
Output
+
Serial windings
Higher Voltage
Parallel windings
Higher Current
DC+Vin Vout
Adjust
L1
10 mh
DC-
+in
-in
R5
9 K
ohms
R7
1 K
ohms
R6
99 K
ohms
2N2222A
1 Amp Bridge Rectifier
or
1n4007 x 4 each
(D1-D4)
+
~
~
Generator Regulator and Meter
-
C1
Q1
SW2
IC1
Part Description Qty
Battery 9 voly 1
Battery Clip for 9 volt 1
C1 400 uF 50 volt 1
D1-D5 1N4007 4
IC1 LM317 1
L1 10 mh 1
Meter Velleman LCD 1
Q1 2N2222A 1
R1 240 1/8 watt 1
R2 2.6K 1/8 watt 1
R3 100 1/8 watt 1
R4 1 ohm 1 watt 1
R5 9K 1/8 watt 1
R6 99K 1/8 watt 1
R7 1K 1/8 watt 1
SW1 1P1T 1
SW2 2P2T 1
Circuit board, Perf board as needed
Wire as needed
Fan motor Modified 1
Heat sink for Q1 1
Output
-
Brushless DC
Motor windings
Future development
• Working on a higher output version.
• Different muffin fan
– Output dependant on fan specs
• Bicycle 12 volt, 6 Watt dynamo
– 12 volts at 500 milli amps
• A new regulator with 500 milliamp current limit
12 Volt 6 Watt Dynamo
The 500 Milli-amp Alternator
The 500 milli-amp Regulator
This system has not been flight tested.
http://pcbheaven.com/wikipages/How_Brushless_Motors_Work/ http://www.pcbheaven.com/wikipages/How_DC_Motors_Work/ http://www.ti.com/lit/ds/symlink/lm317.pdf (the regulattor IC) http://www.frys.com/product/5434439#detailed (the meter)