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What does power balance and voltage balance of a circuit tell? How to calculate them?

I am not familiar with these terms so I can't say they are widely used where I have worked but I can take a guess at possible matches. Power balance sounds like power CONSERVATION, which as you know ...
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3 votes

Linear Regulator: What is Current - Supply (max)?

That device uses a PNP pass transistor that requires base current from the ground pin. If the input voltage drops low enough that the LDO cannot regulate the pass transistor goes into saturation and ...
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3 votes

Linear Regulator: What is Current - Supply (max)?

No, that is not max current to Vin. Those parameters are poorly copied, if you open the real datasheet it explains it better. What it means is how much the regulator itself consumes while providing ...
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5 votes

Linear Regulator: What is Current - Supply (max)?

It is the maximum current at the GND pin: According to the datasheet, which also explains the "dots": limits applying over the full Operating Junction Temperature range are denoted by a “•”...
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1 vote

How can negative feedback reduce distortion if A*beta>>1?

A main property of any system with negative feedback is that it copies the inverse behavior of the feedback network. Thus, if a (linear) voltage divider with transfer ratio K = R2/(R1 + R2) < 1 is ...
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4 votes

How can negative feedback reduce distortion if A*beta>>1?

You can model a feedback system with distortion by adding a distortion voltage to the output, done here via adder X3 which adds a "Disto" voltage. \$ A_{ol} \$ is the open loop gain. \$ \...
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2 votes

How can negative feedback reduce distortion if A*beta>>1?

Quote: "Doesn't the condition of stability state that A×beta should be less than 1 otherwise it will be unstable. Does that mean we will get reduced distortion but on unstable condition?" ...
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1 vote

How can negative feedback reduce distortion if A*beta>>1?

A canonical block diagram of the classic negative control loop is this: - \$r\$ is the reference, \$y\$ is the output and \$e\$ is the error. We want to minimize the error (ideally to zero) at steady ...
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2 votes

How can negative feedback reduce distortion if A*beta>>1?

One reason why negative feedback is beneficial to an amplifier is because it reduces distortion by a factor equal to 1+Abeta. If there is no feedback (open loop) then beta is equal to 0, 1+betaA is ...
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0 votes

220 hot water heater wirring to outside breaker box

With the small amount of details provided in the question, it doesn't sound like a good idea, especially if you are talking about connecting directly to the service switch upstream of the breaker ...
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0 votes

What decides the amount of power being drawn by a heating element?

Power 'P' drawn by a heating element is determined by its operating voltage 'V' and operating current 'I'. P = V * I Operating current 'I' is determined by the element's operating voltage and its ...
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5 votes
Accepted

Converting 1-5Hz from linear generator into 60Hz

1-5 Hz is nearly DC. It's unlikely that a practical transformer could be of use to convert it. One idea: rectify the windmill AC to DC, then use an inverter to step up the DC to 60Hz AC. That might be ...
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3 votes

What decides the amount of power being drawn by a heating element?

For example, if I have 220V 10A power line, when I plug a heating element into it, will it take all available power? All power supplies/power lines have a maximum current that can deliver. If your ...
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2 votes

What decides the amount of power being drawn by a heating element?

Assuming the heating element is a pure resistor, the power drawn will be defined by the voltage of the source (220V in your case), and the resistance of the heating element. The power can be ...
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1 vote

How can a reed switch be used for high current applications?

You will want a protection circuit (or BMS, stands for Battery Management System) for the LiPo pack, to implement overtemperature and overcurrent cutoff. The protection circuit will have a MOSFET that ...
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  • 4,680
19 votes

How can a reed switch be used for high current applications?

For long-term reliability, a 60 A load requires relay contacts rated for at least 100 A. The coil current for such a contactor almost certainly is greater than the reed switch rating. There are at ...
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26 votes

How can a reed switch be used for high current applications?

Don't use the reed switch directly. Use the reed switch to switch the coil of a larger relay. Alternatively, use the reed switch to switch the gate of a FET large enough to handle to load current.
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1 vote

how to map 1V - 10V to 1.6V to 3.2V for voltage regulation using TL494

When you're mapping one voltage range to another there's a scaling factor and an offset. Take the range of the voltages you're converting from, you've stated two different ranges, 10-100 and 1-10, we'...
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1 vote

Using Common-mode choke as inductor

Current mode chokes work differently to single inductors. Normally there is opposing current in each coil. This is critical as the magnetic flux from each winding opposes the other and even under high ...
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1 vote

mosfet to protect reverse plarity from a power suply range 10v-18v DC

Use a bridge rectifier, instead.
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  • 9,677
0 votes

Flyback Converter: Where does the reflected voltage come from?

There is no such thing as the magnetic field collapsing. The primary and secondary winding share the same core and therefore have the same flux. When the primary switch opens, the MMF (synonymous with ...
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2 votes
Accepted

LLC resonant capacitor RMS voltage and output capacitor ESR calculation

The rms value of a periodic voltage waveform affected by a dc (average) value and an ac ripple (rms) is determined by: \$V_{rms}=\sqrt{V_{ac}^2+V_{dc}^2}\$. You thus measure or determine the ac rms ...
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0 votes

Does skin effect increase the eddy current losses inside magnetic core?

The confusion arises from a category error, I think -- skin effect is core loss! If there were no skin effect, we would know that the conductivity of the core is zero, and thus core loss is zero. For ...
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1 vote

Connecting sets of pc fans to a 12v battery

If the fans are PC fans that typically means either 12V or 5V fans. Since you are talking about phone adapters, I'm assuming you are looking at 5V fans. Don't use a house phone adapter, which is a 100 ...
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0 votes

Would increasing the load resistance in a buck converter increase efficiency?

Assuming that the question asked is formulated as you have written that is, "Would increasing the load resistance in a buck converter increase efficiency?" Also assuming that increase ...
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2 votes

Would increasing the load resistance in a buck converter increase efficiency?

Would increasing the load resistance in a buck converter increase efficiency? Unlikely. The losses in a buck converter will be fairly predictable across a wide range of loads especially if a ...
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0 votes

If we change the PV panel, should we also change the MPPT controller block?

If your MPPT controller can control the load so it matches the rise in PV output impedance when shaded then your energy conversion will be optimal. This demands you regulate PV voltage with solar ...
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1 vote

How do I calculate the potentiometer value for the controlling of Alpha angle of a phase control IC?

From the datasheet on page 7 you have a formula for the current into that 47nF cap C5: (K is apparently 1.1±20%) Since the voltage on the cap is the integral of the current multiplied by 1/C, I get a ...
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If we change the PV panel, should we also change the MPPT controller block?

A lot of MPPT controllers have a voltage/current range where they perform optimally and a much wider range where they perform "somewhat". You may be operating in this wider range when the ...
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1 vote

Trouble using PNP as a switch

You are shorting base to ground to activate the PNP transistor. It's emitter is connected to 11.1 volts via an ammeter (very low impedance). This means, almost certainly that you will destroy the PNP ...
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0 votes

Can anyone explain the role of some of these blocks in this PV inverter system?

1)Battery Switches Relay protection for battery Charge (Ch) and Discharge (Dch) 2)Unipolar Switching I believe it is the port for modulating the DCAC inverter with an "Amplitude modulation ...
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Can anyone explain the role of some of these blocks in this PV inverter system?

The batteries can be charged or discharged. The switching selects this. The DC rail voltage needs to be converted to the mains peak voltage and be able to vary it. This is what the flyback converter ...
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