Questions tagged [load]

An electrical load is an electrical component or portion of a circuit that consumes electric power. This is opposed to a power source, such as a battery or generator, which produces power.

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32 views

What device has high inductance? For example >1000mH (for 220Vrms 50-60Hz output) [duplicate]

What devices have high inductance values (for example >1000mH?) What I found in a real device (for example induction motor) datasheet is just near <1000mH (on rotor and stator.) Is there ...
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77 views

Why are standalone MOSFETs and transistors preferred over integrated load switches?

As a novice to EE concepts who's trying to apply it to Arduino projects, I was doing hours of research on how to electronically switch another higher current (or voltage) device/component/subsystem on ...
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116 views

The voltage becomes zero when the load is connected [closed]

This is my circuit. When I connect the load of 10 Ohm, the voltage goes to zero! The voltage goes to zero even if I put resistor of 10 kOhm.
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46 views

Does the lm317TG require a load resistor in the final design or just for testing?

I'm building variable voltage regulator, the regulator has levels of 9, 12, 15 and 18 volts and a potentiometer that allows for incremental adjustment between the levels, so at level 18v you can drop ...
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1answer
38 views

How can I calculate current with load switch? [closed]

I want to use a load switch for protecting my PCB. I also want to watch/measure the current drawn by my board. How can I sense/measure the current drawn by my board, using a load switch like the ...
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32 views

What is meant by static and dynamic loads in electrical drives?

What is the definition of a static load and a dynamic load when it comes to electrical drives? Can someone give some examples for both types of loads?
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4answers
86 views

„Power circle“ - first buck then boost for converter testing

I would like to test the efficiency of some buck converters. I am thinking of using two current sensors like INA219 (or similar) connected to an Arduino and using the serial monitor to gather data. ...
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59 views

Why does power driven to the load has this expression?

I'm designing an oscillator, I'm using as textbook Krauss one. I would like to design the oscillator In function of the power it must give to the load and the fundamental frequency. I have seen this ...
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48 views

Balanced slope detector load impedance

Hello question about FM demodulation here:In a balanced slope detector in class we discussed this picture: How can we connect a load to the output of the Balanced Slope Detector such that it doesn't ...
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1answer
43 views

What is the equivalent capacitive load seen by the IC if in a datasheet of a chip CLmax=10nF given and I connect an RC filter as a load?

I have a stupid question where in the quick, the answer does not come into my mind. If in a datasheet of an integrated circuit, a maximum load capacitance is given, e.g. 10nF, and I want to connect an ...
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2answers
41 views

What happens when the motor torque is constant and the load torque suddenly decreases?

It is a situation where the load torque (Ta) suddenly decreases while rotating the shaft with a motor(PMSM) at a constant motor torque (Tm). In my opinion, the rotational speed of the shaft (I-moment ...
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1answer
40 views

Different chemistry of batteries in operation

I had an idea of using different chemistry of batteries as shown in the schematic figure Is that possible to design a system in that way. According to the design, I am using all the evaluation boards....
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1answer
37 views

How to determine preload resistance needed for an ATX power supply to power up?

I want to make a benchtop power supply from a 20 pin ATX power supply from the last millennium. I have seen posts, but still need help. So far, I have shorted PWR_ON to ground and have connected an ...
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4answers
171 views

How to combine wall outlets for higher amperage?

I have a large single phase AC motor that draws 30 amps at 125v. I only have access to NEMA 5-15R outlets (which are rated for 15 amps). However, several outlets are on different lines (different ...
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68 views

An impossible task? Reverse current/short circuit protection not only for load but also for power supply

This is a magnetic phone charger. It's a USB cable that plugs into a standard 5V phone-type charger. The magnetic "plug" has a (+) center-pin and a (-) round metal as the ground with a ...
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55 views

Multimeter as a variable load

I want to measure the current that can be supplied from a lead acid battery I have. (To know it's remaining current supplying capacity). To measure current I need to connect a load and an ammeter (...
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60 views

Surface temperature of a load resistor

How can I calculate the surface temperature of a load resistor? I'm given requirements that I may need a 1W 500 ohm resistor. During test fixture or product debugging the resistor is almost always is ...
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3answers
48 views

High-Side N-Channel MOSFET Driving

Is this an acceptable way to drive a mosfet? In this case, I'm trying to turn on a high current load, but in case the load is changing it's resistance/impedance, or in the possibility it's ...
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2answers
131 views

Suitable Half Bridge Driver to control capacitve load

I am looking for a method to reliably and quickly charge/discharge capacitors. Each capacitor should be individually charged/discharged. The charge/discharge rate should be in the microsecond range (...
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1answer
52 views

Connecting multiple loads to an extension cord

We have a garage at our house and whilst there is electricity going to it, it's basically just one outlet connected to our second fridge/freezer via a 15A extension cord. I was wondering if it would ...
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1answer
31 views

In a transformer, how do you determine where the induced EMFs (E) and voltages (V) are placed in a vector diagram?

I will be citing pictures from Electrical Technology by Theraja. So there are different cases with regards to the transformer depending on what losses and loads are considered. Each of them have ...
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1answer
58 views

Reason to connect a bidirectional tvs diode in paralell with a unidirectional one

I am designing my own high-side smart load switch for my power supply using TPS27SA08 ic. I decide to investigate how it works this evaluation board https://www.ti.com/lit/ug/slvubd4b/slvubd4b.pdf?ts=...
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23 views

how does power load sharing work when power supplies have different/variable capabilities/capacities?

I work with large networking gear fed by multiple AC->DC power supplies. One of the modules we use takes multiple AC inputs, when both inputs are active the module can supply 6KW of output DC ...
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1answer
57 views

LED Spotlight array issues

I am making a "lightbar" for my vehicle which consists of 7x 6" diameter spot lights linked together. The specs for each of the individual lights are below: LEDs: 14x 3w OSRAM Max ...
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1answer
46 views

Is a VL3030 a suitable replacement for a ML2430

Hi i am attempting to replace a battery in my electronic compass and im supposed to use an ML2430 however this is proving to be hard to get hold of and expensive. Im concidering using a VL 3032/HF5N ...
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24 views

Load/Shunt resistor value calculation for DC-DC Converters

I have DC-DC converter with rating -4KV and 1W. The unit supports current monitoring of output voltage. I would like to test the current monitoring using shunt resistor. What should be the rating of ...
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41 views

How to make a synchronous generator unstable

I was try to analyse what factors can affect the stability of synchronous generator . Let's say a synchronous generator working in isolation and some loads are connected to it and we have to make it ...
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2answers
32 views

Motor Mechanical Torque vs Motor Electrical Power

Let us say there is a constant load which is driven by a geared 3-phase ACIM (AC Induction Motor) of 5kW power rating. The mechanical load and its speed is constant. If I would need to replace this ...
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1answer
74 views

How bad is it to momentarily overload a transformer? [closed]

I have an espresso machine from the US running on a transformer in the UK. Inside the machine there is a grinder, a pump, and some heating elements. The machine is labeled 120VAC 1150W. I have it ...
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1answer
39 views

Steady State speed of rotor in following doubly excited system

I'm trying to analyse following system - A three phase armature winding on stator and on rotor field winding and both stator and rotor are cylindrical . And armature winding is connected to a three ...
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37 views

DC motor, confusion in specification about Current

So, I am trying to build a little robot mower, and getting all parts. So I recently buyed two DC 12V motors, here is the specs: Now I am trying to calculate how big or which battery should I use, and ...
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1answer
60 views

Is there a mathematical representation that represents the output voltage of a buck or boost converter in discontinuous mode?

Recently I have learned that in buck or boost converters, the output voltage depends only on the duty cycle and input voltage in continuous conduction mode or when current is continuous. However, in ...
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25 views

Naming the circuit of a PV-cell

I've recently been attending a solar-engineering module at university, however, I'm not on an engineering course so this module is completely new to me. This was shown on a lecture slide, however, the ...
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28 views

common circuit to turn on/off ac motor of 110V AC or 230V AC using MOC3041 and BTA16 Resistor calculation

I am building a common circuit to turn on/off ac motor of 110V AC or 230V AC using MOC3041 and BTA16. How do i calculate both resistor value R and Rg ( With Wattage ). For accurate control of TRIC. ...
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22 views

How does changing the inductance, capacitance and load in a buck or boost converter affect the circuit?

Before anyone calls me out, yes I am asking electronics related questions due to homework but honestly I am able to answer some of them. There are just some that I need StackExchange insights. For ...
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18 views

How to power multiple microprocessors and loads for a modular system on single bus?

I am considering high-level design choices to build a modular system. I want to make a single design of a microprocessor board that can be connected to identical copies of itself and share a single ...
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2answers
25 views

Measuring the capacity of a 40v lithium ion, lawnmower battery

I purchased a 40v Greenworks lawnmower battery, and it's listed capacity (6,000 mah) doesn't seem to be accurate based on what I'd expect to get out of it when mowing a lawn. How would you go about ...
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1answer
17 views

MDIO bus max fanout

I know that the maximum number of devices that can be connected via MDIO bus is 32. But how to determine the real maximum fanout of MDIO bus. I mean I have a PCB (6U size) that has AM335x SoC driving ...
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1answer
42 views

Best way to turn off P-FET with 3.3V available (P-FET Load Switch Application)?

honestly I'm drawing a blank. I am trying to turn on and off a load with a P-CH MOSFET. I used generic resistor values just to be clear. Now, in this example the VGS will clearly never go to 0. It ...
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48 views

How to connect a load to an amplifier without a loss in gain?

I have this circuit below, that represents a common emitter amplifier: When connecting a load of 10 ohms to the collector node and a signal to the base node there is a huge loss in the gain of the ...
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5answers
130 views

Current and voltage [closed]

Suppose a 100W load works on 100V with 1A current. Can the same load work on 1V and 100A current flowing through it? (Not considering circuit breakers).
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1answer
92 views

How does this under voltage lockout (UVLO) work?

In my project, I need an under voltage lockout (UVLO) to connect the load electronics to the energy-storage element via a power-gating transistor when the voltage across the supercapacitor exceeds ...
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1answer
80 views

Are there any “smart” fuse boxes? [closed]

I'm not sure I know the proper term or how it is in other parts of the world, so I'll just explain in detail: In my country every house has a "fuse box" - the electrical entry point to the ...
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0answers
54 views

Load sensor - to sense/track a ball movement

Wondering if anyone can give me some directional steer on a project I’m working on for Uni. In short, My team are working on a project where we want to track the movement of a croquet ball from one ...
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30 views

What breaker should I use to protect downstream?

I have a 16A supply connected to a junction box to split into a 16A feed and a 13A double socket. The issue is the 16A is connected to a load that will have high inrush current. I have protection for ...
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3answers
66 views

Distortion in output signal in amplifier after connecting load

I want to design an amplifier which works in 20kHz-100kHz range with 0.1V peak to peak signal. This is my circuit. It works fine in the simulation. It works fine without connecting R6 8 ohm load. But ...
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70 views

How to detect load is connected to a MOSFET?

How can I detect a load is connected to a MOSFET and report that back to the MCU? So the MOSFET can be ON or OFF, but I need to know in both situations if there's something connected or not. NOTE: if ...
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1answer
51 views

How does complex loading affect an op amp's power dissipation

I'm trying to calculate power dissipation in a complex load. I know that the power loss due to the resistive component is dissipated, and that the power loss due to the reactive component is canceled ...
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1answer
130 views

Gain with load or gain without load?

There is a problem I have been dealing with for hours. In my Electronic 1 lecture, small signal analysis was like this: The small signal equivalent of this circuit in my lecture notes was this: When ...
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2answers
91 views

How to find the load resistor's resistance?

Use max power transfer theorem to calculate the value of RL for the following circuit. I've done the Thevenin's equivalent circuit but from there I don't know how to find the \$R_{Load}\$. I need it ...

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