Search found 8299 matches

by Arlo1
Dec 13, 2017 1:47 pm
Forum: Motor Technology
Topic: OSHW TO247 IGBT watercooled laminated half-bridge
Replies: 124
Views: 7306

Re: OSHW TO247 IGBT watercooled laminated half-bridge

I should add 790 phase amps is much above what I normally run. For the winter it's at 700 and if I push it in the summer usually 750 is max. I was trying to see how far I could go. I use a Arduino to flash a led to tell me what stage had the fault. There is 100s of times there is no issue but it tri...
by Arlo1
Dec 13, 2017 11:15 am
Forum: Motor Technology
Topic: OSHW TO247 IGBT watercooled laminated half-bridge
Replies: 124
Views: 7306

Re: OSHW TO247 IGBT watercooled laminated half-bridge

Yeah I am using shottkys to clamp the gate to +15 and -5 that I run. And yeah just after clicking the order button I read and found the part infineon uses... Ok either way there are on order and I will run some tests when I can. My gate control has been really good ;) As well I am using a switch rat...
by Arlo1
Dec 13, 2017 1:26 am
Forum: Motor Technology
Topic: OSHW TO247 IGBT watercooled laminated half-bridge
Replies: 124
Views: 7306

Re: OSHW TO247 IGBT watercooled laminated half-bridge

I see HHs post again... 2 things that scare me first is you could pull the gate on hard and maybe put to much voltage into the gate? I am sure as the voltage drops on the Collector the current flowing into the gate will disappear but still scares me. So Should you not add a resistor in series to mak...
by Arlo1
Dec 13, 2017 12:21 am
Forum: General Discussion
Topic: Bitcoins
Replies: 103
Views: 7109

Re: Bitcoins

Holding stock of a company is worse the holding paper money.
Bitcoin can adapt to many things other crypto tries to offer, but its limited to 21 million coins
by Arlo1
Dec 12, 2017 11:30 pm
Forum: General Discussion
Topic: Bitcoins
Replies: 103
Views: 7109

Re: Bitcoins

markz wrote:
Dec 12, 2017 11:10 pm

1 Bitcoin is worth $22,192usd
CDN....

Right now its $16,xxx USD

https://www.google.ca/search?q=bitcoin+ ... e&ie=UTF-8
by Arlo1
Dec 12, 2017 8:09 pm
Forum: Motor Technology
Topic: OSHW TO247 IGBT watercooled laminated half-bridge
Replies: 124
Views: 7306

Re: OSHW TO247 IGBT watercooled laminated half-bridge

I first discovered the zener clamping here http://ivanbennett.com/forum/index.php?PHPSESSID=1l2ts20u38pal7a2j91atk8mc3&action=dlattach;topic=112.0;attach=269 Later I found its called active clamping and Power Integrations did some improvements over the basic concept, but I liked that basic concept ...
by Arlo1
Dec 12, 2017 7:54 pm
Forum: General Discussion
Topic: Bitcoins
Replies: 103
Views: 7109

Re: Bitcoins

I think it will go MUCH MUCH higher. If the Value of Bitcoin takes over as the main currency for the planet it is positioned to be in the neighbourhood of 20-100million/coin. Even higher as the value of the USD or what every old fake currency gets deflated as people loose interest in the old shit......
by Arlo1
Dec 12, 2017 1:40 am
Forum: Motor Technology
Topic: OSHW TO247 IGBT watercooled laminated half-bridge
Replies: 124
Views: 7306

Re: OSHW TO247 IGBT watercooled laminated half-bridge

So to start with I think I have suffered from to much voltage rise on VCE during desat events. So If I had a better setup to watch that VCE spike and control it rather then the ACPL333j just shutting it off what it thinks is slow... I think I would move from 99.9 % reliable to 99.9999% ;) I first di...
by Arlo1
Dec 11, 2017 12:09 pm
Forum: Motor Technology
Topic: OSHW TO247 IGBT watercooled laminated half-bridge
Replies: 124
Views: 7306

Re: OSHW TO247 IGBT watercooled laminated half-bridge

Marcos, I have been to busy to read this whole thread. But I started yesterday. Great work so far. I am also looking at something to do slow turn off and would like something watching voltage on the collector. I was looking at the infinion driver which claims to do this... But doing it with discrete...
by Arlo1
Dec 08, 2017 12:03 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

On that note.... Did you guys know with the model 3 Tesla gets all the heat for the interior from the motor and controller from a heat pump.... So if the car is cold they will feed current though the motor and controller and get it warm but the car is locked in position then uses the heat pump to ta...
by Arlo1
Dec 08, 2017 12:01 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Isn't there a danger of overheating holding the motor at stall? p.s. I know next to nothing Yeah the energy required to do it with the motor and controller is small. When at the track I would push the mechanical brakes as hard as I could then pin the throttle and hold it for a few seconds before th...
by Arlo1
Dec 07, 2017 5:35 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

But at the same time the mechanical brakes might make the most sense...
by Arlo1
Dec 07, 2017 2:48 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Hmm that seems to mention it's from park and not from a stop and go type driving situation, and it's very likely they are just thinking it's the brakes even if it is the motors doing the work. I'll look further into it later.
by Arlo1
Dec 07, 2017 11:26 am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Seems like its the motors doing it. To hold a car on a slope like that the amount of energy used is VERY small!
by Arlo1
Dec 06, 2017 8:50 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

They use software to make the throttle work for the full range from a stop but when you let off after you are moving the first part of the throttle becomes variable Regen. just want to clarify so i understand. there are 3 things about tesla you like - throttle feels linear from 0 to max - when you ...
by Arlo1
Dec 06, 2017 4:55 pm
Forum: Motor Technology
Topic: Game Changer Page 3 with video of 1700amps!!!!
Replies: 84
Views: 9424

Re: Game Changer Page 3 with video of 1700amps!!!!

Buk___ wrote:
Dec 06, 2017 12:18 pm
Arlo1 wrote:
Feb 02, 2016 10:45 pm
... maybe with some silver grease under that so they conduct well.
Have you (anyone here?) tried Stabilant 22 contact enhancer for this purpose?
Looks interesting!
by Arlo1
Dec 06, 2017 4:52 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

IMG_20171006_223541699 (800 x 450).jpg emmgee that might help for the dead zone... I have to think about that. But I think lebowski is right. I intend on making a throttle that is dual opposing hall signals and have an adapter that accepts that. Also thanks Luke. I was hoping they would keep some g...
by Arlo1
Dec 05, 2017 5:06 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Not suspension. What I am talking about is light throttle low speed stuff
by Arlo1
Dec 04, 2017 2:30 pm
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 506
Views: 38450

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

A freind give me a Model S 100D for a couple weeks I notice a few things I would like to add to my car. 1 is the dead spot in the throttle is not there on a Tesla. They use software to make the throttle work for the full range from a stop but when you let off after you are moving the first part of t...
by Arlo1
Dec 04, 2017 12:50 pm
Forum: Battery Technology
Topic: Bridge-less PFC isolated 99% efficiency capable charger
Replies: 8
Views: 523

Re: Bridge-less PFC isolated 99% efficiency capable charger

Yes I can already use the controller from my CRX to Regen into the battery or buffer the grid.... The problem is I would need 480v 3 phase hooked up to any place I plan to charge at.

Most EV charging stations are 240v single phase
by Arlo1
Nov 20, 2017 10:49 am
Forum: General Discussion
Topic: Differences between the old and new version of phpbb & proposed changes
Replies: 118
Views: 2683

Re: Notes on the differences between the old and new version of phpbb

The view your posts link should be on the top of every page like it used to be. I don't like how you have to click quick links first to find it.
by Arlo1
Nov 18, 2017 1:15 am
Forum: Battery Technology
Topic: Bridge-less PFC isolated 99% efficiency capable charger
Replies: 8
Views: 523

Re: Bridge-less PFC isolated 99% efficiency capable charger

Goal is to reduce charger size and weight. Right now chargers are ~ 10x of a inverter that drives the motor.....
by Arlo1
Nov 16, 2017 11:12 am
Forum: Battery Technology
Topic: Bridge-less PFC isolated 99% efficiency capable charger
Replies: 8
Views: 523

Re: Bridge-less PFC isolated 99% efficiency capable charger

Hi guys I have been working on this again. I have a version with the diodes and cap removed out of the out put stage that I am setting up to run the ceramic heater elements in my car. The Goal is to run the 470v max battery voltage into the converter then have a current controlled and Isolated outpu...