Questions tagged [loss]

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6
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1answer
4k views

Dual active bridge converter

I'm having issues calculating the power losses associated with the operation of a bidirectional isolated Dual Active Bridge DC/DC converter. The converter is controlled using Phase Shift Modulation (...
3
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0answers
57 views

Can I calculate minimum rise time of a transmission line if I know the length and the loss tangent?

Overview: I am trying to work out if it's possible to transmit my 1.2Gbps MIPI data down a 600mm long flexible PCB strip. Assuming I have the impedance correct, will the signal still be degraded by ...
2
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0answers
45 views

What is the “short-range outdoor model (ITU-1411) with a distance-dependent path-loss” mentioned in this paper?

I am reading the paper Graph Embedding Based Wireless Link Scheduling with Few Training Samples, and trying to reproduce some of its results. This paper aims to solve the wireless link scheduling ...
1
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0answers
71 views

Temperature rise in the inductor?

I have a customized inductor which is of E70 core. I would like to calculate the temperature rise in the inductor. Ac copper loss= 5W, DC copper loss 2.5W, core loss 8W (according to steinmetz). I ...
1
vote
1answer
60 views

How to calculate reduction of inductance eddy currents in ferromagnetic core?

Suppose you have a LC circuit. Now at high frequency the core loss of the inductor meaning hysteresis and eddy current loss will increase. When this happens the frequency increases while the ...
1
vote
1answer
172 views

Cascade impedances and Return Loss

I have 75 Ohm connector connected to 75 Ohm Load trough 50 OHM PCB to PCB connector. What trace impedance should be on PCBs to get optimal Return Loss?
0
votes
1answer
38 views

How can I calculate the worst-case Tj of a MOSFET in discontinuous operation at another Tamb?

I am faced with the task to calculate the maximum junction temperature of a MOSFET in a half-bridge, having conduction losses, switching losses and diode losses. The real difficulty comes from the ...
0
votes
1answer
25 views

Is RF propagation path loss symmetrical and independent of clutter location?

Scenario: Consider two measurement points, point one is about 3m above ground level within a cluster of buildings (such as within an office park), and point two is about 1km away with an elevation ...
0
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1answer
42 views

How to avoid RF signal loss in a conductive cage acting like a Faraday shield?

I have a standard chip antenna mounted on a large ground PCB plane. The product is unfortunately encapsulated inside a relatively open (carbon-fiber) conductive cage. Unfortunately, I see an obvious ...
0
votes
1answer
25 views

High voltage DC point to point transfer

I have a contemplated DC electricity system that has a battery room at a distance from the use. The battery room would be about 150 feet away from where the power is used (for lighting, computer ...
0
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0answers
76 views

Magnetic loss of steel

The software called gprMax which simulates EM waves in varying environments. I am trying to enter steel has material but from the picture, it also requires the magnetic loss(ohm/meter). But I have ...
0
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0answers
55 views

Power dissipation BJT transistor as voltage follower

Following the discussion from this thread I am finalizing my calculations. I am not sure that I am calculating the power dissipation correctly. Given the following circuit I need to operate the opamp ...
0
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0answers
52 views

Unexpected values from insertion loss calculation in IEEE P802.3cg documentation

I'm looking at the insertion loss calculations from an IEEE document on P802.3cg (10SPE Ethernet). On pages 6 and 7 they talk about insertion losses over the cabling in a multi-drop scenario. I'm ...
0
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0answers
62 views

Coax cable loss drops by approximately 0.5 dB at a specific frequency

I am trying to understand why the measured loss of our coaxial cable is decreased exactly at a specific frequency. My understanding is that the loss should be linear with the frequency. However, there ...
0
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0answers
32 views

Reading core loss graph of an inductor core

The question is somehow unrelated but I hope someone answers, From the above graph, how can I get the value of 0.3T line @ 25kHz ? The scales in the axes confused my mind.
0
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0answers
50 views

Non-uniform temperatue distribution

Please assume a semiconductor chip like IGBT or MOSFET heated by a specific power loss. It is found that the more the power loss is, the more severe the chip's temperature distribution non-uniformity ...
0
votes
1answer
207 views

Do I need to consider shunt admittance for line losses doing load flows?

If I have a long transmission line (Pi model) the current just go through the equivalent impedance of the line, but I've seen demonstrations that include this shunt admittance as if the current flows ...