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UAV Factory USA LLC. 

50 South Buckhout Street, 
Irvington, NY 10533 USA 
Phone:  +1 (914) 591 3070 
Fax: +1 (914) 591 3715 
Email: 

josephm@uavfactory.com

 

UAV Factory LTD. EUROPE 

24A-52 Ganibu Dambis,  
LV1005, Latvia 
Phone: +371 29119398 
Fax: +371 63048747 
Email: 

sales@uavfactory.com

 

13 

 

 

9.

 

LED Indication 

Four indication LEDs are located on the front side of the GPU, see Figure 11 for reference. The main purpose of LEDs is to 
facilitate  set-up  procedure,  simplify  pre-flight  checks  as  well  as  to  provide  clear  identification  of  the  battery  status 
before the flight. The following LED operation is implemented in the GPU: 

6 V

 – green LED indicates 6 V voltage presence. 

12 V

 – green LED indicates 12 V voltage presence.  

BAT

  –  green  LED  indicates  that  battery  is  supplying  the  system.  When  LED  is  off  the  generator  or  external  power  is 

supplying the system. 

CHRG

 – red LED indicates battery charging. When LED is flashing the battery voltage is low and the generator provides 

not enough power. 

10.

 

Tachometer 

Tachometer input allows to monitor engine or generator rotation speed using engine ignition system  hall sensor. This 
reading can be sent through TTL port to autopilot and transmitted to the UAV ground station via the rf-link. 

Connect signal output to RPM sensor input and ground pin to common ground of the power unit  - see Figure 13 and 
Figure 14 for details.  

 

 

Red mark 

RPM sensor 

GND 

Generator 
GND 

External power + 

Brushed gen 

Figure 14 Connector J2 description (for brushed generator) 

Summary of Contents for GPU

Page 1: ...ton NY 10533 USA Phone 1 914 591 3070 Fax 1 914 591 3715 Email josephm uavfactory com UAV Factory LTD EUROPE 24A 52 Ganibu Dambis LV1005 Latvia Phone 371 29119398 Fax 371 63048747 Email sales uavfacto...

Page 2: ...nitored during the flight Generator power unit can be used with brushless or brushed generators that have a voltage output within 10 35 Volts and 13 50 Volts respectively Integrated Lithium Polymer ch...

Page 3: ...m continuous battery input current 8 A Maximum continuous external power current 8 A Output voltage 6 V and 12 V Maximum output voltage ripple 200 mV 6V 400mV 12V Continuous load current 6 Volt output...

Page 4: ...uckhout Street Irvington NY 10533 USA Phone 1 914 591 3070 Fax 1 914 591 3715 Email josephm uavfactory com UAV Factory LTD EUROPE 24A 52 Ganibu Dambis LV1005 Latvia Phone 371 29119398 Fax 371 63048747...

Page 5: ...presented below Efficiency for the 6 V output against the input voltage is shown in Figure 1 efficiency for 12 V output is shown in Figure 2 The maximum continuous power of the GPU is dependent on th...

Page 6: ...91 3715 Email josephm uavfactory com UAV Factory LTD EUROPE 24A 52 Ganibu Dambis LV1005 Latvia Phone 371 29119398 Fax 371 63048747 Email sales uavfactory com 6 Figure 2 Efficiency at 12 Volt output vs...

Page 7: ...the brushless GPU version the 3 phase rectifier is used between the generator and the internal DC DC converter of the GPU refer to Figure 5 Therefore DC voltage at the DC DC converter is equal to rec...

Page 8: ...The ratio between the pulleys is chosen to keep the GPU input voltage under the 50 V limit Figure 6 Belt driven onboard generator example In many cases at low engine rpm the voltage generated is less...

Page 9: ...diagram for brushless generator Figure 8 Typical connection diagram for brushed generator GPU Generator Battery 6 V load 12 V load Transmitter Battery GND Brushed gen Ext power GND GND 6 V out 12 V ou...

Page 10: ...ircuit in the payload unmanned aircraft can still perform a safe landing 6 Battery backup External battery provides power supply to the system in case the input voltage drops below the battery voltage...

Page 11: ...mately 0 4V and GPU cannot provide 12 V voltage if battery voltage is less than 12 4 V and starts to operate with 100 duty cycle Figure 10 Output voltage in battery source mode 7 External Power Supply...

Page 12: ...52 Ganibu Dambis LV1005 Latvia Phone 371 29119398 Fax 371 63048747 Email sales uavfactory com 12 Figure 11 Input Output connectors and status LEDs Figure 12 Connector J1 description Red mark RPM sens...

Page 13: ...presence 12 V green LED indicates 12 V voltage presence BAT green LED indicates that battery is supplying the system When LED is off the generator or external power is supplying the system CHRG red LE...

Page 14: ...value Serial protocol uses 83 bytes packet and send it one per second Figure 15 shows the output string format This protocol is valid for GPU serial number starting from GPU0042 For older serial numb...

Page 15: ...B09 B10 B11 B12 B13 B14 B15 B16 B17 R p m space space space V g e n B18 B19 B20 B21 B22 B23 B24 B25 B26 B27 B28 B29 B30 B31 B32 B33 B34 space space space V b a t t B35 B36 B37 B38 B39 B40 B41 B42 B43...

Page 16: ...EXT BATT Figure 16 Cable set wiring schematic diagram Table 1 Cable set description of connections Label Wire color Connection description GEN red Brushless generator phase A red Brushless generator...

Page 17: ...less version GPU100B GPU Accessories Item Order code Qty FISCHER cable plug for J1 S104A056 1 FISCHER cable plug for J2 S104Z056 1 Cable set with plug for J1 50 cm SJ105 1 Cable set with plug for J2 5...

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