Questions tagged [loss]

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511 views

Capacitor loss in high frequency DC-DC converter

I have designed a boost converter: Vin = 60 V Vout = 150 V Switching frequecny: 340 kHz or maybe higher Filter capacitor: 1uF The picture is only a basic structure of boost converter, and what I ...
2
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1answer
565 views

Power losses of a switch

A power transistor is used to switch a 25 A, 600 V inductive load at a switching frequency of 100kHz with D=0.5. Turn-on and turn-off each occur in 100ns and the collector on-state voltage is clamped ...
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1answer
474 views

Why return loss gets ripples?

I tested an amplifier on a circuit board with a network analyzer. It was tested under input power of -20dBm, which is well within the linear region.The amplifier uses SMA connectors. The simulated ...
1
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1answer
687 views

Methods for measuring cable path loss in RF Testing

I have been reading about various methods to perform a Cable Path Loss for RF Testing but not being a core RF person, I needed some insights on how it is done in Field or Lab. Here is my understanding ...
1
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1answer
2k views

Compensating for power loss through resistor in high/low pass filter circuit?

Circuit design of a Low-pass filter borrowed from Wikipedia Article on the subject: Circuit design of a High-pass filter borrowed from Wikipedia Article on the subject: I'm thinking of implementing ...
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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?
4
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1answer
2k views

Flyback transformer core heating up

I am designing a discontinous conduction mode flyback converter, 100kHz using UC3844 IC with the spec. 220V,50Hz to 5V 5A. The issue is that after testing it for an hour, the transformer starts ...
0
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1answer
2k views

Flyback converter losses

i have been designing flyback converter of a 5Volt 5 ampere specifications output deriving from 220v ac mains. But i have been stuck at one point and can't seem to get out it. Efficiency is ...
0
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2answers
754 views

Switching loss in a synchronous converter (buck, boost or buck-boost) when light load occurs

When a synchronous converter operates in high load condition,if the inductor current is always positive, the switching loss of the Synchronous mosfet is minor in comparison to the switching loss of ...
0
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1answer
88 views

Heat Cable: directly powered with 230V AC vs. 12V DC with step-down efficiency

Is it any less efficient to drive a 12V version of a heat cable from a step-down buck than directly powering a 230V version of it directly from the wall?
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2answers
74 views

Which of the two connections is best for reducing losses?

I have a choice between the following two set-ups for a project. Option One is to have the motor controller mounted close to the batteries but further away from the motor. Option Two is to have the ...
-1
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2answers
10k views

Calculating copper losses of transformer given iron loss and maximum efficiency

I wonder if anyone can help me understand copper losses in transformers a bit better. I'm having problems understanding the highlighted part on the attached picture half way down the page. I sure its ...
0
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1answer
1k views

A problem on Relay Power loss

On our quadcopter, we're carrying a switching circuit that would allow the switching between two batteries. When using the 2 Channel Relay Module, the quadcopter is having a hard time flying with it. ...
0
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1answer
216 views

Calculating power received and V (rms) given powr loss

The transmission line cable below is 10m long and has a power loss of 1 dB/m at the frequency of the source. What is the power received at the receiver (in dBm), and the voltage (RMS) of the signal at ...
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2answers
273 views

Which oscilloscopes can reliably measure losses in an inverter for an AC motor?

For my next project at my workplace I am looking for an oscilloscope which gives me good support in measuring the losses in one of the half-bridge switches over one commutation period. The last time I ...
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2answers
9k views

Insertion Loss vs Transmission Loss

Today I was told that something was causing Transmission Loss and not Insertion Loss. Can someone clarify what these two phenomena are? I always thought they were the same thing expressed in dB or dB/...
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2answers
992 views

Transformer core maximum power

so i am an EE undergrad, and i am wondering if and how exactly does a transformer core limit its power capacity. From my understanding, the rated power of a transformer is due to the current carrying ...
3
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5answers
59k views

What causes cables to get heated up and melt in a circuit? (DC Circuit)

I know lots of current can cause heat but what else? Can too much resistance in thin cables cause heat?
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2answers
2k views

Backup Battery for 12V DC Motor

Ok so here's my idea to run backup 12V DC motor power, but I'm stuck on a part of the wiring. 120V AC Plug---> 120V AC to 12V DC Converter---> SPDT Relay (This is where I'm stuck. How would you wire ...
1
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1answer
215 views

How is the heat lost in a peltier distributed?

I'm looking at peltier elements to heat my project. I seem to find that most are about 5% efficient, but how is the 95% turned into heat distributed? Does the cold side get 47.5% and the warm side ...
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 (...
1
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1answer
665 views

Losing sensitive data when trying to send them via GSM

I am working on a system which collects data from a set of ultrasonic sensors. Those sensors work at 40Hz frequency, and each data they send are valuable to me. I need to send those data to a mqtt ...
6
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1answer
28k views

Definition and Explanation of Insertion Loss and Return Loss

I'm trying to understand the physical meaning on Insertion Loss and Return Loss on a transformer, specifically RF transformers. The values are often quoted as figures of merit in datasheets, but I'm ...
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1answer
104 views

Antenna: RF, need help

I am trying to find a path loss model for "wireless sensor network". More specifically, I am looking for model for Cellular tower 100~1000MHz) and (60~600W) as transmitter and a small wireless sensor ...
2
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1answer
2k views

What does limit transferable power through a transformer?

Assume that there is a transformer as in the image above. The applied primary side voltage \$E_1\$ is always AC. We design the transformer so that the magnetizing flux \$\Phi_m\$ does not saturate the ...
8
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2answers
2k views

Safe shutdown/restart Raspberry Pi due to a power loss

I am a total beginner in electronics so I need your advice. Does this simple circuit provide for a safe shutdown, with two super caps of 10F? (Original image)
2
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1answer
419 views

How significant are hysteresis losses in iron wires with RF currents?

I understand that iron isn't a great choice of conductor for RF currents, as a wire dipole antenna for example. I understand there are several reasons, but I'm wondering specifically about one: ...
0
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1answer
1k views

How best to detect missing/lost packets in XBee S2 communications

My main aim now is to determine if there will be any packet loss in transmission between two Xbee s2 modules, when the distance between them are varied, and in different environments. Please how best ...
6
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1answer
984 views

Why do opposing magnetic fields in the same core cause the core to heat up?

I inherited a choke of an odd design, with two windings on the same core. Separately, each winding was about 30 uH. In series, they were about 90 uH. When used in a split-bus boost converter, one ...

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