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Easy peasy
Easy peasy
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Today,
00:28
Easy peasy
replied to a thread
LLC converter is preferable for step up operation?
in
Power Electronics
For high o/p volts a sine wave of volts in the Tx can be very helpful, such as a parallel loaded SRC...
see more
7 replies | 355 view(s)
20th June 2018,
06:39
Easy peasy
replied to a thread
extract the dc current
in
Analog Integrated Circuit (IC) Design, Layout and Fabrication
If you want only the AC current - as you said in your 1st post, then a capacitor will block the DC and only let the AC thru ...
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4 replies | 123 view(s)
20th June 2018,
06:38
Easy peasy
replied to a thread [SOLVED]
high voltage zener operation
in
Elementary Electronic Questions
Also 5mA in the zener + say 5mA in your "load" is 10mA from the 50kV = 500 watts from the load, ~ 500 watts in the dropping resistor - not...
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32 replies | 587 view(s)
19th June 2018,
23:47
Easy peasy
replied to a thread
BLDC blower motor producing more noise, which is affecting digital circuits
in
Analog Circuit Design
You may want to slow the turn off as well, as this is where you can get inductive Vspike overshoot if you turn off too fast and there is no large...
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11 replies | 442 view(s)
17th June 2018,
08:02
Easy peasy
replied to a thread
BLDC blower motor producing more noise, which is affecting digital circuits
in
Analog Circuit Design
no dead time is probably a mistake, raising the turn on R will give you a small amount of dead time - depending on the total wiring & layout...
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11 replies | 442 view(s)
17th June 2018,
08:00
Easy peasy
replied to a thread
High power Solar charging topologies
in
Power Electronics
if it's a straight buck converter then 60A is do-able, but 2 x 30A probably easier, if you need buck & boost - then Sepic or push-pull fwd...
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2 replies | 137 view(s)
16th June 2018,
22:05
Easy peasy
replied to a thread
IR2110 High Side Problem
in
Power Electronics
D3, D13, must be higher voltage than HVDC, usually 600V devices
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6 replies | 220 view(s)
16th June 2018,
04:18
Easy peasy
replied to a thread
Loop-gain calculation
in
Analog Circuit Design
I saw the posts that included R1, very good up to a point, but if you are seeking the input to output transfer function you have to include the RC...
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26 replies | 701 view(s)
16th June 2018,
04:11
Easy peasy
replied to a thread
BLDC blower motor producing more noise, which is affecting digital circuits
in
Analog Circuit Design
It is often the case that turning on the fets hard and fast makes a lot of RFI - due to commutation of the inherent diode in the other fet. ...
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11 replies | 442 view(s)
16th June 2018,
04:06
Easy peasy
replied to a thread
adjustable voltage and current power supply
in
Power Electronics
It does appear you are using a lot of bits to achieve an outcome that can be attained with a simpler circuit and less bits and still be rugged and...
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14 replies | 420 view(s)
16th June 2018,
04:02
Easy peasy
replied to a thread
IR2110 High Side Problem
in
Power Electronics
1) it is easy to kill these devices 2) you need to turn the low side on at least once for ~ 10uS or more to charge the upper bootstrap cap - ...
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6 replies | 220 view(s)
16th June 2018,
03:59
Easy peasy
replied to a thread [SOLVED]
what are the risks for isolating test equipment by negating earth ground
in
Elementary Electronic Questions
If the 'scope ( for example) has RFI caps from P & N to earth, then then metal chassis will sit at half the mains volts - if you have an all...
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9 replies | 331 view(s)
15th June 2018,
03:33
Easy peasy
replied to a thread [SOLVED]
60Ah Battery charging using solar energy
in
Power Electronics
The biggest mistake people make is not having enough solar panel, and not having enough storage - also consider different types of LED bulb ...
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8 replies | 305 view(s)
15th June 2018,
00:46
Easy peasy
replied to a thread
Loop-gain calculation
in
Analog Circuit Design
A loop connection would have to include R1, i.e. connection to the LHS of R1, then the roll-off with freq will be included in any "loop" ...
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26 replies | 701 view(s)
14th June 2018,
11:34
Easy peasy
replied to a thread [SOLVED]
60Ah Battery charging using solar energy
in
Power Electronics
LiFePO4 is the only choice for reasonably fast re-charge - and good cycle life at the DoD (depth of discharge) you wish to go to. Depending...
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8 replies | 305 view(s)
14th June 2018,
10:02
Easy peasy
replied to a thread
Loop-gain calculation
in
Analog Circuit Design
R2 provides degeneraton - a loop requires connection to the actual input ...
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26 replies | 701 view(s)
14th June 2018,
07:37
Easy peasy
replied to a thread
too hot if irrush current without NTC
in
Power Electronics
Ideally - have the inrush NTC on long leads so that the solder joints do not degrade over time from over temp - this is quite a common fault on...
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2 replies | 150 view(s)
14th June 2018,
03:11
Easy peasy
replied to a thread
Flyback PFC passes mains harmonics
in
Power Electronics
The results are surprisingly good, it would be a bonus if the flyback could keep switching thru the mains zero Xing - but sometimes you can't...
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4 replies | 165 view(s)
13th June 2018,
23:09
Easy peasy
replied to a thread
Loop-gain calculation
in
Analog Circuit Design
is there is some marginal internal feedback? - nope. Loop gain refers to gain around the complete loop, there is no ckt shown to complete the...
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26 replies | 701 view(s)
13th June 2018,
11:32
Easy peasy
replied to a thread
200 amp power supply
in
Power Electronics
61000-3-12 limits are outside the requirement in this case. It is, perhaps unfortunately, the prerogative of large consumers that need to...
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15 replies | 467 view(s)
13th June 2018,
11:06
Easy peasy
replied to a thread
200 amp power supply
in
Power Electronics
As you are above 16A per phase - those do not apply ....
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15 replies | 467 view(s)
13th June 2018,
10:51
Easy peasy
replied to a thread
Loop-gain calculation
in
Analog Circuit Design
Respectfully - there is no loop in the ckt.
see more
26 replies | 701 view(s)
13th June 2018,
10:20
Easy peasy
replied to a thread
200 amp power supply
in
Power Electronics
Um, "not allowed" by whom..? Santa Claus - you are right however about the DC - < 5mA in the neutral for earth stake corrosion reasons -...
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15 replies | 467 view(s)
13th June 2018,
07:55
Easy peasy
replied to a thread
200 amp power supply
in
Power Electronics
If you wire the primaries of the Copper/Steel solution with 3 ph and a neutral you can use Triacs to control the pri current, and have diodes on the...
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15 replies | 467 view(s)
12th June 2018,
07:25
Easy peasy
replied to a thread
Why does this current limiter oscillate?
in
Analog Circuit Design
the gain of the op-amp is only <1 at high frequencies, put 1k0 in series with C10 and bump up the other res (R97,R102) by a factor of 10, ...
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17 replies | 494 view(s)
12th June 2018,
02:40
Easy peasy
replied to a thread
low-pass RC filter design with attenuation known
in
Analog Circuit Design
Your home work is really your concern, not to clog up message boards like this one ...
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11 replies | 307 view(s)
11th June 2018,
07:34
Easy peasy
replied to a thread
low-pass RC filter design with attenuation known
in
Analog Circuit Design
The ratio of R/C is dependent on the value of any load R... heavy loading = large C, and vice versa ....
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11 replies | 307 view(s)
11th June 2018,
06:36
Easy peasy
replied to a thread
low-pass RC filter design with attenuation known
in
Analog Circuit Design
The attenuation is easy enough to calc: Xc/SQRT((Xc)^2+(R)^2), 20log Answer for deci-Bell, where Xc = 1/( 2.pi.F.C) at 820kHz the L...
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11 replies | 307 view(s)
11th June 2018,
06:31
Easy peasy
replied to a thread
200 amp power supply
in
Power Electronics
Easiest way is to go buy some RST-5000 power supplies from Meanwell, 2 x the 48V 100A variant - and run them in parallel, 3ph + N + E...
see more
15 replies | 467 view(s)
11th June 2018,
02:29
Easy peasy
replied to a thread
Booster Circuit ripple
in
Analog Circuit Design
Start with 47uH at suitable current and 220uF low ESR electrolytic.
see more
4 replies | 209 view(s)
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