After I had a few problems with the standard power module from 3DR and the ones from Hobbyking, like falling off resistors (overheated) and burned out BEC from voltage spikes, I finally designed my own PM modules. The sensor boards are compatible to Pixhawk, APM, Pixhawk lite, AUAV-X2, DroTek und CUAV Pixhack.
These modules are based on a true hall current sensor, so heat is no more an issue !!!
The sensors boards are able for continuous current of 100A for HS-100-V2 and 200A for HS-200-V2 (no time limit), the maximum over current is 1200A@25'C and 800A@85'C for 1 second.
Here some details:
The Sensor board is installed only into the positive main battery wire and the BEC should be installed as close as possible to the battery connector.
Quality control of the finished product:
To post here all the quality control during the production would be a very long story, so all I can say is, that it is carried out and recorded.
The final QC before the boards are shipped, is a setup with an FC (Pixhawk) and connected to MissionPlanner to check the calibration values for current and voltage measurement.
This final test result will be passed to the customer together with the order confirmation and shipment tracking number by e-mail.
REM: Which power module supplier out there actually use the PM to power up a real FC before shipment ?
So I hope everybody understands, that if I say "safety first"... then I mean it.
Why Hall sensor ?
Why only a few supplier use a true hall sensor for current measurement in an MR ?
Why output voltage to Pixhawk /APM is 5.35V and not 5.0V ?
Why the cable from UBEC to the sensor board is 4 pol ?
Why sensor board and UBEC are separated ?
Why is there an additional capacitor installed at the input of the UBEC ?
How can I get one of these boards ?
Hi Adam, guess 5 days until the first PCB is assembled and firmware coding is done, then at least 2 days for testing... so if everything is smooth, then the hub should be available in approx. 7-9 days.
Sensor Hub X2 to protect paralleled LiPo packs and as an direct replacement for any circuit based on the "ideal diode" design.
This sensor hub is to connect two current sensors (LiPo's) in parallel. The current of both sensors will be summarized and passed to the FC. The voltage measurement of the LiPo packs will be collected from both sensors and passed through the Hub to the FC.
The main purpose of this hub is to replace existing protection circuits (like an ideal diode) and to monitor, that both paralleled LiPo’s supply the same current to the system.
Since we monitor the current of both batteries, we will find out very early when a LiPo starts to fail… before it is too late.
If the difference in current is bigger than +/- 10%, the Hub will issue a warning to the pilot via a Power Led and/or buzzer (fast flashing) connected to the Alarm I/O.
If the difference in current is larger than +/- 20%, the Alarm output will be always ON to indicate the fault… the pilot should immediately land and check the batteries.
Additionally, there is a reserve relay contact (alarm) for the user to implement any desired function.
The I2C bus is for future integration.
39mm x 31mm x 6mm / 7g without cables.
Will try to prepare a short video about the function of this Sensor Hub... post it here when ready.
A short presentation about how the Sensor Hub X2 works, when combined with a flight controller, 2 current sensors as well as two batteries connected in parallel.
Further info can be found here: www.mauch-electronic.com
I've updated the installation wiring drawing of the Sensor Hub X2, a downloadable version of this drawing can be found here:
Can I use my own Castle Creation 10A BEC with the Current sensor? Its quite a high quality BEC.
If I do this, will the calibration values you provide still be correct?
This is the BEC I am referring to: http://www.rcgroups.com/forums/showthread.php?t=748220
While I can't quite comment on this exact piece as I do not own a Drotek power module...
A few months ago I did order a drotek GPS module.
Was quite unhappy with it. Even though its supposedly the same as the clone M8N I ordered off goodbang, it performed quite a bit worst.
I wont go into much detail as it doesnt really matter at this point. The GPS is sitting in the drawer collecting dust.
I just thought I would mention it as I was very unhappy with my Drotek purchase and I can see their business practices are quite underhanded judging by the fact that JPerin decided to jump in on the thread and try to promote their own product. Fully being able to create his own thread and promote his own products there.
Best of luck to anyone ordering from Drotek... I must certainly will not!
PS : Ordering my Mauch power module this weekend. Excited to add what appears to be a well made piece to my quad. Will post my review in this thread once its installed.
Hi and greetings from Finland!
I Just wanted to give positive feedback to Christian. I purchased HS-100A-HV with 4-14S-HYBEC for my hexa. From order confirmation to delivery it took only 11 days. So, thanks for fast delivery and also, thanks for very fast and helpful customer support :)
Keep on good work!
Got mine yesterday,reach Malaysia in 2 weeks.
Did a quick test on my D130,awesome piece of current sensor...i threw away my attopilot 180A!!!
Can you post a diagram of the sensor which one is the I,V and G wire out on the DF13 that goes into Pixhawk.I assume is pin 3,4 and 6.Correct me if i'm wrong.
I'd like to get some 200A HV sensor boards, when do you think you'll have them back in stock?