SinusLeistungsSteller - SLS Development/2005 |
... and here the beginnings of the SLS from 2005 30.12.2005: We made first measurements on the test-bench! All as expected or even better! We could draw up to 1,5kW continous load (SLS2000, TM685-20PRO14-18w) from 3 car-batteries connected in series - more was not possible. But it was not the fault of the SLS... With a stronger DC-source we could expect more from the SLS2000. I think it handles 2,5kW without problems - don't forget to mention the possible peak-power ;-) So we need more power!!! In the next days we will reconstruct a welding device (see below) into a powersupply. This way 4kW(+) continous power should be available - directly from the wall plug to which we generate back. By that, it will not get so warm in our office during summer and the electricity bill also benefits ;-) Because we regenarate back into the powersupply system and do not use propellers, eddy current braks or similar, we are able to setup and measure every conceivable operating point directly on the test-bench (10.200rpm at 1,4Nm - no problem!). By the way, we charge our batteries with our SLS - because it is able to regenerate! Should we think about wind energy? 13.12.2005: The test-rig works! The load machine (on the left) is able to regenerate up to 11KW at 6.000rpm! This is not possible yet - but could be in the future ... On the right side, the reduction gear is visible. Both at the motor output and also after the gear, the torque can be measured via torque measurement shaft. In the front (in comparison almost not visible) our SLS2000 and a TORCMAN TMS430 Triton as an example for device under test (DUT). 08.12.2005: We are thinking about increasing the max. input voltage up to 52V. Will this hurt anybody? PLEASE SEND YOUR OPINION TO "info@SinusLeistungsSteller.de" ... 05.12.2005: There was some space left in the aluminum case: We additionally developed a small circuit board, which enables up to 4 status-LEDs, 4 optocoupler-outputs and control electronics for a external 12V-fan. This board will be standard for all SLS WITH aluminum case. Markus expanded his monstertruck-SW with automatic brake lights and reversing lights. The fan output can supply a external fan. By that the continous load efficiency increases remarkibly. Of course, the fan output is temperature controlled. 18.11.2005: Today, we recieved the first 20 PCB boards with reworked layout from our electronics manufacturer (CALA-Computer). The PCB of the power module now has a 0,42mm(!) copper layer. If nothing goes wrong, the first should operate till December. The devices are currently prototypes and scheduled for intense measurements and other tests on the test-bench. Meanwhile Thomas finished the construction drawings of the reduction gear for the test-bench. So, the drawings can be hand over to the manufacturer. Beginning of December the last parts should arrive - the test-bench is hopefully ready till Christmas. 14.10.2005: Markus modfied his monster truck for electro drive with a SLS2000 and a TORCMAN-Monster. Also a special software, optimized for drive operation (forward, backward, variable RPM, metered braking, etc.) is already implemented as a "raw version". The model weighs 14kg and really runs very fast! When accelerating, the spinning wheels spread stones of the road ... OK, the big TORCMAN-Monster is a little bit oversized for that model ;-)) ... (Of course we will further focus primary on flight controllers for heli- and wing-models!) ...an ideal experimental carrier: 19.09.2005: The Plettenberg-motor HP 370/40/A2 was operated today successfully with the SLS2000. He reached amazing 18.000rpm at 36V and are surprised about its smooth running. Also at low RPM it was able to satisfy, despite the high cogging torque! Now the time is ready to work with our test-bench, in order to see how it handles load situations ... 18.09.2005: Aspach is now behind us, all in a hurry printed flyers are distributed to the people and both SLS2000 are also alive! Thomas had a small "problem" with his helicopter, which he leds back to a disturbed radio link. The SLS remained undamaged thanks to the robust aluminum case. We agreed that the reaction to our new system was "very positive". We look forward to your response, questions and of course your suggestions! 16.09.2005: We are ready for Aspach 2005! The software for Thomas helicopter got the last improvement. (the startup behaviour via remote control was a bit "choppy"- but now it is optimal). A low or high RPM (for the actual flight) can be selected via remote control. Both RPM-operating points are connected via slow transitions (controlled RPM-ramps), to assure a realistic run up. - sounds almost like a turbine ;-) Both of our SLS-prototypes got (just in time) a beautiful aluminum case! One of these SLS2000 will fly in Thomas´ ETALON18 - with the other we want to make some "wind" at the TORCMAN stand. Hopefully non of the prototypes will "blow up" in front of the audience - we have no replacement with us ... 09.09.2005: Today is flight day! The ETALON18 from Thomas is placed into the garden and we make a last check of the SLS-parameter with the notebook. Thomas wants 1000rpm more (which he also gets) and then we switch over to remote control ... after about 2 minutes of hovering in low height there is a first stop over to measure the motor and SLS temperature. All in the safe area! Three 5 minute flights follow; Thomas slowly gets the optimal RPM and we are curious about the temperatures ... Later we determined that, for hovering this 8kg heavy/light model about 1kW continous power is required. The SLS2000 passed his first practical flight test under load! We enjoyed our first flight and discussed, what needs to be done in the following week till our next destination (Aspach 2005)! 02.09.2005: Thomas Kalle (Kalle Flightvision Technology) brought us his ETALON18 helicopter today! The ETALON18 is equipped with a TM430-40PRO-10w, LiPos (10S4P) and a 1,80m rotor. We applied our first SLS2000-prototype (still without aluminum case but with heatsink) and begun to optimize the startup behaviour - first without, later with rotor blades. After the startup worked smoothly, we also tested higher RPMs - but without lifting (the whole test was performed indoor - the heli and all moveable located in the room was fixed :-) ... August 2005: Different outrunner motors from TORCMAN were tested successfully. Also including the TORCMAN-Monster TM685-40PRO14-9w as well a TM685-20PRO14-18w, TM430-40PRO10-14w, TM430-40PRO-10w and the short TM430-30PRO14-14w. We got the motor from TORCMAN for tests. THANK YOU for the support! Because there is no fitting load machine available, we were not able to test them under full load. But the results encourage us to continue! |