Search found 12 matches

by gerad
Thu Sep 24, 2015 7:26 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

The disks of the retarder are of cast iron ; the "magnets" are the coils .....
by gerad
Tue Aug 18, 2015 10:28 am
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

You need to dump around 400kW to 800kW (500HP to 1kHP) some where as heat. That's a significant amount of heat to deal with. ------- Thats why i chose eddy brake ... you need to put little power to brake alot and it does not heat up ( on our aplication ). what about connecting it to the power grid? ...
by gerad
Tue Aug 18, 2015 9:46 am
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

i know about water brake ( same problem ... heat .. you need water source for good operation ) , on 300kw oil pump the oil wil be too hot in max 5 min ( ~ 50 l ). For low load you can use : steering pump ( about 15 hp ) , alternator ( use rezistor on AC side in delta ) and you can controll the load ...
by gerad
Mon Aug 17, 2015 8:14 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

And the heat goes to ... ? from the convertor ...
more pictures : - psu = russian psu with 12v , 24v 100+ amp , 48v 60 amp
- drums are home made
- load cell
- unfinished little eddy brake
by gerad
Mon Aug 17, 2015 11:34 am
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

Nice software . i have made a few years ago , a little eddy brake before i buy the big one . I dont think is a good ideea with tork convertor but you can use a oil pump from a hidraulic sistem . ( work well but you need a lot of oil for heat excange )
by gerad
Sun Aug 16, 2015 7:32 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

kb1gtt yes , i dont have a datasheet but some general info http://telmausa.com/TELMATECHWEB/DOC/PDF/TL101009.pdf , the load cell i have are from digital scale for market ( aluminium 250 kg ~ 2500 n ) one is new one is .... but good . I can not use brakes for absorbing the power .. after ~ 30 sec of ...
by gerad
Sun Aug 16, 2015 7:01 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

the arduino code : serial comands : 1 - light a led ( test) 2 - light a led ( test) 3 - sends temp , kpa , rh ( weader station ) ? - mcp adc ? adc1 , adc2 ... , adc8 , rpm , roller rpm , need to do : implement rpm and drum rpm ( on int0 and int1 ) , and pid for load control ( rpm or speed setpoint )
by gerad
Sun Aug 16, 2015 11:27 am
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

The retarder take 24v at ~ 100 amp (2.4kw ) and can brake 1000 nm ( ~ 1000 hp ~ 760 kw ) can be easly rewire for 192v and use rezistor + triac (?!) for 220v but i have the power supplay alreddy ( it is a big an bulky psu ~ 40 kg ) so ... i use like it is . I use labview becouse is the single thing i...
by gerad
Sun Aug 16, 2015 9:47 am
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

puff : entertaining theme! as it will be calibrated and in what region based? Tanki! U menya yest 'kh 2 250 kg tenzodatchik i kalibrovka nikh. Tork yavlyayetsya sleduyushchim rychag (1m dlya teoreticheskogo nm / m). Region: zamedlitel 'yavlyayetsya 1000nm +. YA iz Rumynii (yesli eto oblast 'vy imeye...
by gerad
Sat Aug 15, 2015 10:10 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

Home made rolls (4x 900 mm - 218mm diameter ) for 2wd , EDDY brake from volvo truck , 24v 100 amp big russian battery charger ( from a ship :)) ) , igbt module . I will make some photos on the rolls , brake , bearings . ( i need just 2 big steel profiles .... and.... work )
by gerad
Sat Aug 15, 2015 7:34 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

Re: DIY Dyno

The schematic and pcb are in eagle ... and software is labview ( i am noob at code .... and it is just for test the hardware . far from working software).
Tanks in advance for your ideas / support / test
by gerad
Sat Aug 15, 2015 12:56 pm
Forum: Misc
Topic: DIY Dyno
Replies: 24
Views: 28389

DIY Dyno

It is someone interested in a DIY Dyno ? so far custom board with : ft232rl ( usb-serial ) atmega328 (arduino firmware) mcp3208 (12bit adc ) mpxh6400 ( 4 bar map ) 2x ina125 ( load cell amp ) 2x rpm ( engine and roller ) 2X 0-5 wb02 imput 2x egt 1x 12 bit optional input 4x opto out ( driving brake a...