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Post by paulg100 on Dec 21, 2016 20:36:31 GMT
re the braking is it not correct that DC breaking and external braking with resistor are two different things. you should still use the external brake resistor.
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Post by Trip Rodriguez on Dec 22, 2016 11:22:59 GMT
This makes me feel a bit better but still motors 3 and 5 got hot enough they wouldn't even lift the platform all the way up until they cooled off! I do not have a tester I can measure temp with. I have just completed a test where I moved the COG backward about 14" and now the rear motors got a little bit warm and front four are all cool to the touch after a rigorous 20 minutes of flying. I'm going to move it forward a little for hopefully a happy medium and go with that. Also my motion stops occasionally in DCS and I have to hit the emergency stop and then reset it and it resumes. Anyone else had this issue? Never happens in P3D, just DCS. I'm using BFF. I'll do a few more tests to make sure I describe accurately what is going on and message Ian, he is fantastic on support! paulg100 Let me take a look at the braking settings and get back to you.
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Post by Trip Rodriguez on Dec 22, 2016 11:54:13 GMT
paulg100 I believe that we are using external braking correctly but this stuff makes my head spin a bit. Check page 4-20 here www.driveswarehouse.com/documentation/Hitachi/WJ200M.pdfAfter reading this I'm going to play with the A053 delay setting some and see how that affects smoothness too. It's been set to 0.0 so far, so no delay before braking begins.
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Post by Trip Rodriguez on Dec 31, 2016 11:07:13 GMT
Hey guys, I've got a question for those with sims like mine and also a short demo vid for you made in DCS World P-51D Mustang.
So the question is relative to weight. After upgrading my steel frame for the upper platform (pics earlier in this thread) I've been having motors get hot to the point of smelling them and the housings too hot to hold my hand on for more than ten seconds or so.
All six motors never get hot at the same time, either the front four do or the back pair do. Based on this I experimented with moving the COG of the platform forward and back until I achieved a perfect balance and the motors stopped getting hot when I used the sim. Having a friend who was taller and a bit heavier than me resulted in the back motors getting hot again.
Tonight the front four got hot with me on the sim, despite me again running it with everything the way I set it up to prevent this, so not sure what happened. After expanding the top frame it's still not too heavy for me to carry around, I'd say maybe sixty or seventy pounds. The side consoles weigh maybe 25 pounds each and I weigh about 180 pounds.
I wouldn't think this would be enough weight to be a real problem, (also keep in mind my torque arms are only at 130mm instead of 160mm) but I'm worried. I have no way to measure the temps of my motors (which do not have temp sensors in them) so I don't know if they are really hot enough to be a serious issue or not.
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Post by tronicgr on Dec 31, 2016 15:19:38 GMT
Hi Trip,
Just a quick question, I don't remember if you used Load Resistors on your inverters, if you did, that is their resistance (ohms)?
They should be lower than the resistance of the motors to take the heat from them under load.
You can measure the resistance of the motors and the load resistors with a multimeter if you are not sure.
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Post by Trip Rodriguez on Jan 1, 2017 6:21:46 GMT
By load resistors you mean braking resistors? I did use them, let me go back and see if I can grab the specs. I'll also double check braking resistor settings again.
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Post by Trip Rodriguez on Jan 1, 2017 6:25:57 GMT
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Post by Trip Rodriguez on Jan 1, 2017 6:33:58 GMT
Also Happy New Year all!
Couldn't resist jumping out of bed to go check, A051 (DC Braking Enable) set to A01 so that's good. A054 braking set to 80% so that should have been adequate but did leave me room for more so I turned them up to 100% and will test if not tomorrow then Monday.
I don't find the resistance rating on the motors, how exactly do I test with my multimeter?
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Post by paulg100 on Jan 1, 2017 9:58:42 GMT
"A051 (DC Braking Enable)" Happy new year Are you sure the DC braking is not causing the heat issue (check warning page 108)? DC braking is not the brake resistor, that is regenerative braking/Dynamic braking. Try disabling DC break (A051 00) as previously mentioned and just use the brake resistor (b090 %) and check B095 is 1 or 2(enable during run 1 is default). what is the difference "Dynamic braking is adjusting the VFD AC output so as to slow the motor, and recover the energy onto the DC bus. The braking resistor then dissipates that energy, preventing the DC bus from rising. DC braking, to me, would be adjusting the VFD output to provide a DC to the motor winding. It would be simple to do. That causes the rotor to have high currents flow in it by generation, which dumps the motor energy as heat. So dynamic brakes dissipate the energy by recovering it as voltage on the DC bus,and then dissipating it as heat(or using it). DC braking would dump it as heat in the motor directly, and not need the braking resistor."
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Post by paulg100 on Jan 1, 2017 10:21:58 GMT
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Post by vicpopo on Jan 1, 2017 12:11:11 GMT
"A051 (DC Braking Enable)" Happy new year Are you sure the DC braking is not causing the heat issue (check warning page 108)? DC braking is not the brake resistor, that is regenerative braking/Dynamic braking. Try disabling DC break (A051 00) as previously mentioned and just use the brake resistor (b090 %) and check B095 is 1 or 2(enable during run 1 is default). what is the difference "Dynamic braking is adjusting the VFD AC output so as to slow the motor, and recover the energy onto the DC bus. The braking resistor then dissipates that energy, preventing the DC bus from rising. DC braking, to me, would be adjusting the VFD output to provide a DC to the motor winding. It would be simple to do. That causes the rotor to have high currents flow in it by generation, which dumps the motor energy as heat. So dynamic brakes dissipate the energy by recovering it as voltage on the DC bus,and then dissipating it as heat(or using it). DC braking would dump it as heat in the motor directly, and not need the braking resistor." Already mentioned at least twice to Trip but he seems not consider that . I will say a little bit directly . Forget DC braking is a shit for simulators !! You just have to enable braking resistors for dissipating overenergy ! Happy new year
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Post by tronicgr on Jan 1, 2017 15:57:59 GMT
Also Happy New Year all! Couldn't resist jumping out of bed to go check, A051 (DC Braking Enable) set to A01 so that's good. A054 braking set to 80% so that should have been adequate but did leave me room for more so I turned them up to 100% and will test if not tomorrow then Monday. I don't find the resistance rating on the motors, how exactly do I test with my multimeter? You can measure the resistance of the coils by measuring between one of the phases (i.e. L1) and the common. You should have the motor wires disconnected for this reading. See here: www.pcbheaven.com/userpages/check_the_windings_of_a_3phase_ac_motor/?topic=worklog&p=1Happy New Year!
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Post by Trip Rodriguez on Jan 2, 2017 1:24:36 GMT
Hey guys! I did not ignore it! After PaulG100 posted about this on Dec. 21st I did my best to research it, looking through the manual for hours. Apparently I never posted my reply with my findings.
(Please note the following is my INCORRECT understanding!) The best I could make out was that one of the wire terminals (that I found was hooked to the AMC1280) controlled enabling/disabling the resistors.
All I mean to say is I didn't ignore it, I tried to look it up and apparently did not succeed.
My apologies and thank you for the help folks!
Trip
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Post by Trip Rodriguez on Jan 2, 2017 13:48:10 GMT
Ok folks, next up something a bit strange. PaulG100 says B090 is a percentage and the manual agrees with this and says the setting range is 0-100 but on my inverters when I go into B090 my setting range is instead 0.0 to 10.0
Why would this be and what should I set it to?
Also FYI, I checked b095 and they are/were all set to 02 (enable always). I checked and this would be the result of my following GA-Dawg's instructions. On page four of his thread he sets b090 to 10 and b095 to 02. Right after that he sets A051 to 01 and A054 to 80 by the way, which is why those were my settings.
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Post by Trip Rodriguez on Jan 2, 2017 15:03:26 GMT
Just did a test flight, motors still got hot.
A051 set 00 (disable) A054 set 100 (but should not matter as A051 disabled) b095 set 02 (always enabled) b090 set 10.0 (max I can set it, see previous message)
Now what?
I do have my online speed (on Thanos board) set to 100% the past couple weeks. i'm going to go to 50% and see if that makes any difference. Also I set A054 to 0 just to be safe for the next run.
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