Tech Talk Friday ep3 - EMI Filter Design Story
Вставка
- Опубліковано 4 жов 2024
- his video 'Tech Talk Friday ep3 - EMI Filter Design Story'. I will tell the story about an EMI filter design that I did and the design issues that came up. #techtalkfriday
Link to Amazon Southwire 15190T: amzn.to/3JBTEmQ
Link to Lithium Battery replacement: amzn.to/4dc7byX
Link to ebay Peaktech PKT-P3440:
Link to ebay Southwire: ebay.us/YnX4Gi
Link to ebay Southwire: ebay.us/IInLM2
Link to ebay Amazon Commercial multimeter: ebay.us/Jvkp9P
Link to UDP3305S bench power supply: amzn.to/3Px1pgY
Link to UTG962E Generator: amzn.to/4ciXiit
KPS DMM9000BT Multimeter: amzn.to/3NHdSOl
________________________________________________________________________
Your support is much appreciated;)
Patreon - I really do appreciate your support? This support helps me purchase the equipment I use for testing a reviews. Patreon.com/KissAnalog
Send your one time donation to PayPal at: KissAnalog@gmail.com
Link to T-Shirts and more: www.redbubble.c...
________________________________________________________________________
pt.aliexpress....
es.aliexpress....
www.aliexpress...
Our official website for updating firmware: www.zotektools.com
Kaiweets store: Get 15% off; discount code KA15: kaiweets.com?sca_ref=1269738.glN6S8aePH
Please use links that cost nothing extra but will help support the channel:
Oscilloscope links:
GW Instek MDO-2204EG: amzn.to/3Vo6UzW
GW Instek MDO-2204EX: amzn.to/3rvY7P...
MicSig Oscilloscope: amzn.to/3B4DcXe
Picoscope 3403D: amzn.to/35UytvC
MicSig Differential Scope Probe: amzn.to/3HvRG4A
Owon clamp meter: amzn.to/3N9LhB3
Picoscope 4444: amzn.to/3AYJzfu
OWON XDS3064AE 14 bit Oscilloscope: amzn.to/42junoK
Multimeter links:
Hioki DT4256 multimeter: amzn.to/3idmexS
Hioki DT4283 high end multimeter: amzn.to/3vCtSe8
ZOTEK ZT-702S Handheld Automotive Oscilloscope Multimeter: amzn.to/3HdG9Zo
Borbede BD-99: amzn.to/3DRgUbZ
Klein MM700 multimeter: amzn.to/3vm8JR3
Fluke 87V link: amzn.to/3l4QUCq
Fluke 117 multimeter link: amzn.to/3oS2Dnx
FLIR DM93 multimeter: amzn.to/3ebyASF
Kaiweets HT200B AC current clamp: amzn.to/33e3czt
Kaiweets HT206D AC/DC current clamp: amzn.to/2HzYLHO
Kaiweets HT118E: Link to Kaiweets HT118E: amzn.to/3Uz6UeJ
Amprobe AM570 multimeter link: amzn.to/3eurd8S
Zotek multimeter: s.click.aliexp...
AliExpress Store: bit.ly/3fkMlPb
Link to Power Supplies:
Matrix 3 output: amzn.to/3MAmwxE
Matrix 32V 10A: amzn.to/41Qcmzb
Nice-Power 30V 20Amps: amzn.to/3qX3NEG
ITech 60V/8A/180W:amzn.to/48Mo9kA
ITech AC power supply: amzn.to/3NVj29M
ITech Electronic Load: amzn.to/3HeTyQR
Matrix LCR meter: amzn.to/48qxJd2
Amplifier Links:
125ASX2: amzn.to/3Taksx5
ICEpower 125ASX2 (lower cost): ebay.us/NPZUWK
Power Supply (looks better than the one I have): amzn.to/3pgfQsp
Enclosure for Class D amp project: ebay.us/ETpmJx
TPA3255 Amp board: amzn.to/3H9uniH
Power Supply for TPA3255: amzn.to/3TSG8Bl
Class D amp project: ebay.us/ETpmJx
Thermal Camera Links:
IR Thermal Camera: amzn.to/3J92LJu
Infrared T2S Plus: amzn.to/3PhxMAJ
Infiray P2 Pro: amzn.to/45Q3Ukw
Topdon TC002: amzn.to/45OHcJr
Links to power stations and LiFePO4 batteries:
Use this link 5% Discount Code: KISSE600LFP：www.pecron.com...
Vanpowers SP200 Foldable Solar Panel: bit.ly/3TLc74y
Vanpowers SPP1500 Portable Power Station: bit.ly/3TI3tUe
Vanpowers:www.vanpowers....
Please use this discount Code for the Vanpowers Super Power Pro power station
5% OFF COUPON - Code: KissAnalog
Link for Redodo LiFePO4 battery: www.redodopowe...
use discount code【KissAnalog】
Link to Ecoflow River 2 (great price): amzn.to/3OodDsT
Link to Goldenmate LiFePO4 battery: goldenmateener...
Link to GoKWh battery: gokwh.com/gokw...
-Exclusive count code (valid for two months): kissanalog12v
Link to GrenerPower Battery: amzn.to/3R9u5Ok
VEVOR Pure Sine Wave Inverter: US: s.vevor.com/bf...
Use the code "SAVEMORE5" for a 5% discount.
Miscellaneous :
Omicron Labs equipment (I am not an affiliate - unfortunately;) www.omicron-la...
Insulated Screwdriver set: amzn.to/3NZo0B5
Erickhill ES100 sound pressure meter: amzn.to/3LBW46l
Wild Badger Chain saw: amzn.to/46rtqNB
chain lube: amzn.to/48UcC3u
I really liked the story Eddie.
If you are interested in doing so, do a series on the basics of power electronics, perhaps with a converter design, and a lab test/analysis to finish it off, I'm fairly certain it would up your engagement since there are many beginners out there that require the knowledge most industry people perceive as basic.
Thanks for the great feedback!
Eddie, outstanding discussion, thanks. EMI filtering has always been seen as a "Black Arts". This is why John Zentier, Manny Rodriguez, and others worked to add Line Impedance Stabilisation Network (LISN) to EMI testing through MIL-STD 461. Impedance variations between the source and loads effects the filtering performance. This was also seen in the medical testing side. By establishing a known impedance, comparison between filtering performance were meaningful. There are outstanding EMI testing houses that just test and do not push fixes and there are the snake oil ones that wrap everything in foil wrap as the solution. Thank you for the interesting discussion.
Thank you for your great feedback! Yes I have seen the side where they throw everything including the kitchen sink at it to solve the problem - and then there is the side that likes to go to root cause.
We must be on the same wave length. Every time I talk about a topic online on a couple of different sights you end up doing a video on what I talked about with in a few day to a week! Amazing!
Great minds think alike;) OR - I'm following you;)
Very interesting Eddie! Amazing how group think can drive something for so long until someone like you (an engineer) thinks hard and questions the group think. Keep up the good work. I enjoy your videos.
Thanks so much! I appreciate you!
Great story!
All of you engineers certainly know a lot more about circuit design than us lowly electricians,...but I think lots of reasonably intelligent electricians would have immediately realized that the voltage difference between neutral and ground depends on the size of the neutral wire and the distance from the panel (and of course we know that neutral and ground should only be bonded at the main panel).
One thing you didn't touch on was that shielded cables, like for VFDs, can have their shielding tied to ground, so I guess there is an exception to grounding only being for safety.
Thanks for the great feedback! You make an excellent point! The copy machine tech should have checked with an electrician to discuss this - maybe the whole big story - belief system would have been avoided;)
Thanks , Eddie .
Thank you for your feedback!
HI Eddie, another very good and interesting Video. Thank you. 😃
Thanks so much!
I just checked the neutral to gnd V of an outlet, with the heater on, and off. Heater off, V = 0.42V, On, V = 2.16V. That was a little lower than I had expected, however, there were no other appliances on, at the time, which draw significant current.
Nice check! Great test - thank you! How much power does the heater require?
I have ESP XG-PCS-15D's on all my important home electronics, as well as a whole home surge protector in my panel.
Used to repair copiers in college ;)
Thanks for the great feedback! Those look great - I need to get one to check it out;)
What telecom and POS filters do is bond N/E after a 1:1 transformer, and then wire N/E as the-same-connection at the outlet.
Thanks John. That's right - and I do show this type of connection in this video: ua-cam.com/video/tZlWu62zk_Y/v-deo.html
Also, I have a new video that will post tomorrow to show the measurements and connections of this Ultra Isolation transformer.
While it is a chat. A picture tells a 1000 words. Some hand drawn drawn blocks diagrams (visuals) might add to the story.
Great point! Thanks!
Whenever my electric heater goes on, the lights dim. Obviously, the line voltage drops significantly, compared to what it is at the breaker box, where the ground & neutral are connected. And ground is ground, and no current flows through the green wire. I bet there's a lot more than a couple of volts between neutral & ground, in my living room! I think I'll check it and see.
Thanks for this great point! The heater only cares about the voltage between line and neutral;)
Marketing calculators! Lol'd hard at that!
Thanks!!
Your company should have sold a $1000 AC cable with your filter. Because we all know, a $1000 cable can cure all power problems. And the copies would look better as well. Lol
LOL - You are so right! We should have sold them to audio folks instead of copier machine users;)
What a rant. How exactly did you develop this filter? Did you test each and every copy machine to find out what kind of disturbances would make a machine go down? If all machines behaved the same, what did they have in common. Some parts used by every manufacturer? Or was it just a couple of MOV's beefed up with CM inductors and some capacitors of which the MOV's did all the hard work? A rather strange story. Do you still have those white papers? I'm interested in their content.
Thanks - great question. I used large inductance CM chokes along with High inductance DM chokes - with the largest capacitance capacitors that I could - with the right amount of dampening. My goal was to filter design to the lowest frequency that made sense - for any noise that might want to be connected. I then added a second stage of near the same. MOVs do nothing for filtering. MOVs are used for surge protection - but I don't like them alone - so I used a hybrid with GDT - much superior.
Cool topic! I've got a balanced preamp in the works and intend to build the chassis as a Faraday cage. Any tips?
Thanks for the topic!! I'll do a Tech Talk Friday this week and make it about this topic;)
8:25 Was that "aluminum" cap you described, an electrolytic? Did they actually use an electrolytic cap for AC, or was it a non-polarized type?
Thanks for asking! Yes, it was an aluminum electrolytic;) It has been so long ago - but I almost think it was polarized too:) But ether way - not to code - and very unsafe.
what do you think about FNIRSI 2C23T ?
Thanks for asking. I'm actually waiting for one to be delivered - so I'll do a review on it - hopefully soon.
Where can I buy that EMI filter you made?
Thanks for asking. I wonder if it is still for sale. I'll have to check. I think we need to do a new design for this channel;)
@@KissAnalog an extension cord with 3 outputs and an EMI filter on each output - it would be true madness :))
The politics of marketing and budget and some of the underhanded stuff that goes on.
When you just want to do a good job and produce a good product .
That’s not the intentions of marketing .
Thanks for the great feedback! This is a balancing act - and unfortunately - some engineers are happy to give in and not try to get the best for the money in their designs...