Questions tagged [inverter]

Electrical device that converts direct current (DC) to alternating current (AC).

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16 views

Equivalent impedance seen at input terminals of inverter stage

I am using a three phase interleaved DC-DC boost converter which is followed by the three phase inverter. I need to model the impedance seen by the DC-DC converter when inverter load is connected to ...
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46 views

Can battery inverters output reactive power?

This inverter manufacturer's Paper Bad Power Factor? – A reason to oversize your inverter mentions that "inverters can generate reactive power without using any active power." Can battery inverters ...
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How can I design the BJT based inverter question given in description?

QUES: Design a BJT based inverter operated from a 1.5 V supply.With the input connected to the 1.5 V supply through a resistance equal to RC, the total power dissipation should be 1 mW and forced β ...
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Powering a max 360 W Ender 3 Pro with a 300 W inverter

I’m planning on powering the Ender 3 with a 200 W solar panel with a 300 W inverter. I saw on some posts that the Ender 3 draws 500-ish watts whilst starting up but then drops to an average of 150 - ...
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3-phase bridge inverter 120° conduction mode

A 3-phase bridge inverter is feeding a balanced star connected resistive load of 20Ω per phase. The gating scheme is 120°-conduction mode. All the switching devices are ideal. Derive the expression ...
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51 views

Why are inverter modules extremely oversized in VFDs?

I was checking a faulty Schneider VFD (ATV312H037N4) which is rated for a nominal output current of 1.5 A. Turns out the rectifier bridge of the inverter module (FP10R12YT3) blew up and after reading ...
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37 views

Inverter EMI filter design

I'm designing an inverter with a switching frequency range of 10-40kHz. The inverter will run off of a DC power supply at a relatively low voltage (30-80VDC) and low power (~100W) for motor control ...
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63 views

120v Inverter and GFCI

I have a 48vdc to 120vac inverter with a 3 wire output (hot, neutral and ground). I installed a GFCI outlet using those output wires. I tried putting a resistor (I tested with 1k 100 and 22 ohm values)...
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Can I run a 2000W power tool off of a 2000 (4000W peak) modified wave inverter? [closed]

Would a 2000W power tool (electrical chainsaw) be able to run off of a 2000W (4000W peak power) modified wave inverter connected to a 12V-40AH AGM battery? Would the motor need more than 2x the ...
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How to handle duty cycle below deadtime in 2- and 3-level inverters

When programming a pwm for a 2-lvl inverter what would be the suggested strategy for a duty cycle close to 0% or 100%, meaning when I cannot guarantee for dead time. What would cause less distortion ...
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I'm trying to build an inverter circuit in LTspice using voltage controlled switches

I'm trying to build a H-bridge inverter circuit on LTspice, but I'm having trouble with getting a correct waveform. The upper and lower switches do not appear to be in sync (i'm not getting a complete ...
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SMPS chopper stage

Please what will the output waveform of a PWM signal look like after being switch by a MOSFET or transistor - especially in SMPS. Will the frequency or duty-cycle of the pulse increase or decrease or ...
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42 views

how to switch on a inverter when my fridge thermostat switches on

Good day, I have a 220v 65W fridge that i use for camping and a 12v/220v 1000W inverter. I need a circuit diagram that will switch on my 12v/220v inverter when my 220v fridge thermostat switches on. ...
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28 views

Terminology of AC -DC converters

I would like to ask about the difference between the terms "AC-DC Converter", "DC-AC Converter" and "Inverter". If I am getting it right, the "AC-DC converter" converters AC voltage to DC. The "DC-...
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Questions about the voltages of a lithium jump starter I purchased [closed]

I purchased an Audew jump starter based on several favorable reviews on youtube. According to the specs, the jump start output is 14.8V, but when I check the voltage with my multimeter it measures 16....
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SiC inverter design w/ STM32 - high switching frequency

I am designing a SiC inverter using a 72MHz STM32F302CC with the STM32 motor control library. The desired switching frequency is 50-100kHz, depending on the device we select. Reading the motor ...
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44 views

How to approach this question?

I found this question is a very interesting one but I don't know how to approach it since I never dealt with inverters. Can someone give me hints ? I found it very confusing that two switches has ...
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Working of a transistor in a TTL inverter circuit

I was referring to TTL inverter circuit in the book Digital fundamentals by Thomas Floyd and its working principles first proposition went as follows: When input is HIGH, Base emitter of Q1 is ...
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Transition between two pwm modes

I am going to implement on mcu following pwm for three phase voltage source inverter controlling the induction motor. The pwm will have two operation modes: 01) asynchronous mode where a/d ...
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52 views

Power conversion causing huge increase in amperage

I've got a transformer ballast driving an HID lamp. When the transformer is wired to 110VAC, it's using about 700mA. When I drive it with a 12v battery and power inverter (to 110VAC) the transformer ...
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26 views

10mA inverting charge pump

I have limited knowledge of switch caps voltage inverters and charge pumps. I need to generate -2.5V in my system capable of sourcing about 7.5mA. I have MCU and two rails 3.3V and 5V. So far, I ...
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How to power LCD backlight converter (from HP elite 8300)

I have 3 LCD screen form broken "all in one" pc (HP elite 8300) And would like to recycle them as normal monitor, but for that i have to power the screen backlight. It's 4 wire coming out from the ...
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What is the best battery topology for my inverter-charger application?

Background: I have a Magnum Energy MSH3012RV 3kw inverter-charger that runs on 12VDC and I'd like to be able to discharge around 250 to 300 AH between recharges (from 120VAC input) without the ...
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LCD backlight inverters

I have two inverters, YEC YNV-01 and ASUS 08-20VL1011H. I don't know, how to power them. I saw this, but my ynv01 hasn't this pinout. it's pins 3 and 4 are connected together, and pins 5 and 6 are ...
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Grid tied inverter

Grid tied inverter voltage is slightly higher than that of grid but once the tie is closed voltage will be equal then how the current will be injected from the inverter
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LCD screen: can this problem be caused by the inverter?

I'm repairing a HP 530 laptop with bad screen image. The image does not flicker, the corruption pattern is static. If I connect an external monitor through the VGA port the image is fine, therefore I ...
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34 views

Detect continuity in AC line during load shedding and take action via DC circuit?

I'm a noob. I have asked another question in this forum, but in component level. As the answer of that question says to use 12v and 5v relay. I reached out to local electroni6c market. But for covid-...
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1answer
79 views

DC-AC converter with GaN in Ltspice

I'm simulating a DC-AC SPWM converter in Ltspice with a GaN E-HEMT (https://gansystems.com/gan-transistors/gs66516b/) but I'm having problems because I get the error for the time step to small. This ...
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45 views

Reverse Engineering a Tamura Inverter Board

This is about the pin-out of 9-pin connector 1 of inverter board Tamura HBL-0291, part of a Toshiba Tecra M2 laptop from the early 2000s (see images). The controller chip on the inverter board is ...
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1answer
34 views

Why the intersection points in SPWM define the width of the pulse?

After my previous question Why the triangle reference wave is used in PWM for sine modulation I still have some troubles on one particular point of natural sampled PWMs or more precisly SPWM. My ...
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Can my solar inverter be significantly driving UP my power consumption or my meter counting excessive production as usage?

I've had a 1.5KWh PV solar system for 3 months now and as any new user I've been monitoring the power generation closely. I've wanted to correlate the power generation to my power usage so I've ...
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36 views

Same voltage inverter

Is there any reason for not finding an inverter that only converts from DC to AC maintaining the same output voltage, e.g. a 220V DC to 220V AC inverter?
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CMOS inverter in series

I have the circuit below. Now my question is: why the rise time and fall time measured on Vout are the same as in a circuit using only one inverter gate? I know the propagation delay is the sum of ...
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43 views

Determining width and length from CMOS inverter layout

How do I determine the width and length from the following cmos inverter layout, given that lambda=0.25um? The answer is Wn=1.0um, Ln=0.25um, Wp=0.5um, and Lp=0.25um. I know that the length is equal ...
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Why the triangle reference wave is used in PWM for sine modulation?

I'm implementing PWM for a three-phase inverter. The documentation on the subject, especially the technical implementations, is very good but as far as I am able to understand none of the one I read ...
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43 views

Three-phase active rectifier - Confusion between rectifier and inverter mode

I understand how a 3-phase inverter works (with 6 IGBTs or Mosfets). However I'm a bit puzzled when using it as an active rectifier. For reference, here's an example of the circuit I'm talking about. ...
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64 views

Can I use 2.5kW solar panels to power 2kW rated grid tie solar inverter?

Can I use 2.5kW solar panels (10x 250 watts) to power a 2kW rated grid tie solar inverter? Will anything blow up? Panels: 10x 250W, 36V panels Inverter: 2kW with max input voltage: 500V Any help is ...
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Linear inverter

I need for my project a circuit that inverts a signal linearly. For example, if my Vdd=1 and Vin=0.8 then I would like Vout to be 1-0.8=0.2. What is the name of a circuit like this?
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109 views

What does “-1” and “x2” mean in a triangle symbol on a schematic?

In this document, P. 5, "test circuit 1", there are triangle symbols with "-1" inside, and another one with "x2" inside. What do they mean?
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IGBT EMITTER COLLECTOR SPIKE OVERSHOOT

simulate this circuit – Schematic created using CircuitLab So, I am building a STEP UP transformer for output Volt 100 Kilo Volt,50 ma Output,50 Kilo Hertz Frequency.For that i have plan to use ...
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71 views

Reason why an inverter will drop the battery voltage from 24 to 10V after turned on and then immeadetly shut down?

I reacently modified an off-grid solar system, nothing fancy just included an automatic "turn on" switch for the Victron Phoenix 24/220 1200VA inverter. Then I connected the loads (2 computers, ...
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27 views

Firing time in VFD inverter

Just a quick one. When looking at schematics for a VFD, I see the same circuits as diodes used in the converter (AC to DC), capacitors in the DC bus and transistors or thyristors used in the inverter ...
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51 views

How do I calculate the value of R1 and R2 if I use 12v for Vin? (*look at image)

I found this circuit on the internet, then I tried to make it and it really works, I can turn on the led lamp 220v 5watt, how do I calculate the value of R1 and R2 if I use 12v for Vin.
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Clock Issues from Buffer

I'm testing a board that is having clock issues. The design uses a 40 MHz oscillator, which outputs a clipped sine wave. The clock goes into an inverter buffer to get a 3.3V, 40 MHz sine wave. When ...
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3-phase inverter - component selection / calculation help

Yes, this is a component selection / calculation topic, it can be considered an "ask". Considering my current schematic and the following parameters: supply = 100~240 VAC (nominal 220VAC and 127VAC ...
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1answer
86 views

Using active BPF to convert a square wave into a sine

I have an inverter that converts 24 V DC to a 48 VAC peak-to-peak square wave with a frequency of 55 Hz. I am then going to use a step-up transformer to output 120 VAC to power some rocket valves that ...
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1answer
40 views

Connecting terminals to transformer on Power Inverter circuit LTSPICE

I am simulating a Power Inverter circuit using LTSpice, but I am confused as to where the corresponding terminals from the resistor and mosfets go. I am trying to simulate this circuit: Based on the ...
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1answer
86 views

400W inverter not charging power tool battery charger [closed]

I have a 2018 Ford SuperDuty with a factory 400 Watt AC inverter. When I plug in a Milwaukee charger, the circuit protection light starts flashing and the battery will not charge. The charger does not ...
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26 views

Weird polarity switching in home inverter wiring

So I have a Backup Inverter installed in my house, it was installed when I wasn't around. Now I need to add an inverter line to a board that didn't had it before. To do this I generally tap the (live/...
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3answers
4k views

Emergency lighting solution

I have purchased these following components: 12V/18Ahr SLA battery 300W modified sine wave inverter 50W LED floodlight (NO SENSORS I.E. PIR, AMBIENT, ETC) 12V relay module We are currently ...

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