Questions tagged [inverter]

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

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HOW TO GENERATE PWM INVERTING MODE FROM ESP8266 [closed]

can someone tell me how to use esp8266 to generate pwm High side at pin D5 and Lowside at pin D4(Inverting mode of D5) for use to make inverter 1 phase please.
Wong's user avatar
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Get power for driver circuitry in an inverter

Planning to build an inverter based on egs002, I got high voltage high frequency side (ferrite core transformer including N-MOS and high speed rectifier) from old UPS board which I will drive using ...
asim's user avatar
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Inverter: High- and low-side MOSFETs

The gate leg of the mosfet in my working inverter suddenly started to short circuit. There are 4 mosfets, 2 high side and 2 low side. There are 2 IR2106 mosfet drivers. The name of the integrated ...
Mhan's user avatar
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Is this modified or pure sine wave...or something else?

I have a 12 volt dc to 120 volt ac inverter built into my custom van. I've been curious if it produces a modified or pure sine wave because I have a need to occasionally plug a ebike battery charger ...
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Grid tie inverter 200 W with low voltage auto disconnect

I have a grid tie inver that produces at most any day 200 watts from my 12 V battery bank. I also have a adjustable auto low voltage disconnect circuit that disconnect the 12 V from inverter when ...
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Inverter Oscillator Ground Return

I have a PCB design for a guitar pedal with a DSP chip processing some audio signals that would normally run off a 32768 Hz crystal, but part of the guitar effect allows the user to change the clock ...
longlivetheDee's user avatar
-1 votes
2 answers
59 views

Why does the resistor need to be placed before the junction in an RTL NOT Circuit

I am trying to implement a simple inverter using transistors. I am confused why placing the resistor between the junction and the LED will not work, but placing the resistor before the junction does ...
michael_fortunato's user avatar
1 vote
3 answers
117 views

Sine wave CMOS buffer from inverters with or without feedback

Is it possible to buffer a sine wave using inverters alone or with some kind of feedback? I've been browsing google for minimalistic (I'm in 3.3-12 V domain) sine wave buffers and this thought stuck ...
San's user avatar
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4am Shut down of hydro system that uses motor as a generator

My micro hydro system "motor as generator" stops generating on random days, but always at 4 am. It seems the resonance between the capacitors and generator winding is lost and the generator ...
Gary St Onge's user avatar
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Sizing a flip(master slave)

I need to size a master slave flip flop in order find the setup time, hold time, clk2q delay, but I'm unable to find any reference how to do it. I have done sizing for inverter chain by keeping nmos ...
Devindu's user avatar
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Discrete MESFET for ring oscillator?

I have previously posted about ring oscillators using discrete MOSFET transistors to make them (the ring oscillator) oscillate at hundreds of MHz, however, the common consensus in this community was ...
spiderman19's user avatar
2 votes
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Is it necessary to add fast recovery diode parallel to MOSFET in inverter that is designed for motor driving?

The line current of the load will be maximum 20 A and the MODFET IRFB4110 has body diode which can easily conduct this current. According to datasheet the body diode should carry 170 A (depending on ...
Sadat Rafi's user avatar
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How to properly calculate the run time of a battery using a power converter?

I want to buy a 12v 100ah lithium battery to power a 750 watts power converter that provides 120V. I would like to know how many hours of energy will I have with this information. I tried some online ...
Roberto de Nobrega's user avatar
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4 answers
139 views

Level shifting from 3.3V to 5V not working: voltage drops when attaching load

I am trying to trigger a laser using an Arduino. I used a power supply to determine that the laser needs a 3.5V (or higher) signal, at which point it draws around 2.2mA from the power supply. When ...
Timeverdrive's user avatar
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H-bridge 12V DC to 12VAC squarewave output

I am trying to convert DC to AC, in this case, 12VDC to 12VAC at 50Hz. I am using MSP430G2553 TI microcontroller to create Mosfet gate pulse. Mosfet model is IRFZ44N. The load is a 200 ohm resistor. A ...
Nabs's user avatar
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2 answers
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What is the best way to convert 3ph 380VAC to 3ph 0V >> 450VAC in range of 800 kW?

I have a company that makes servo AC voltage regulators and some other transformer-based products, and today some of my customers asked me to give him a quotation for an 800 kW Variac, the biggest one ...
AlMoutaz Billah's user avatar
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NAND-based bistable with momentary switch

I want to create a circuit that has two outputs, and two states, where the outputs are either "on, off" or "off, on". The state should be switchable using a momentary SPST switch. ...
Matt's user avatar
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3 votes
1 answer
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Which frequency to consider in SPWM for a transformer, the resulting frequency or SPWM frequency?

I am build an inverter with the EGS002 board, which has a SPWM carrier frequency of 23.4 KHz. In my mind the logic is that the transformer winding, material and size should be calculated using the ...
Augusto Mattos's user avatar
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87 views

Proper IGBT driver circuit for power inverter

I've examined IGBT driver in inverter in power generator (same model as presented here https://www.youtube.com/watch?v=3owRSqmz2JQ). Inverter topology is H bridge with two chokes in series with 230V ...
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MOSFET Circuit to Detect 28V to control an MP1584 enable pin - is my solution viable?

My circuit's goal is to detect presence/absence of 28V on an input and operate the EN (enable) pin of a MP1584 voltage regulator. My circuit seems functional to me but I'd appreciate other opinions of ...
remoc's user avatar
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I want to switch solar panels between a micro inverter and a backup system. How can I do that?

Solar Inverters are switched off during a blackout and make that you have DC electricity on your roof while being without AC in your home. This may not be as urgent where you live, but in countries ...
wogoos's user avatar
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Two motor controllers in parallel

Can I, when connecting two inverters (motor controllers) in parallel, control each current independetly? Also is it possible to charge a battery trough a inverter (motor controller) with both inverter ...
Gabriel Sampaio's user avatar
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2 answers
122 views

Control P-channel and N-channel MOSFETs by common PWM signal

I want to create a very simple 3-phase inverter that is easy to understand, e.g. without using MOSFET drivers. I decided to use logic level P-channel MOSFETs on the high side and logic level N-channel ...
Jonas's user avatar
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Power Inverter Weird Output

I'm simulating a power inverter using Analog Devices LT1158IN#PBF as half bridge driver. This is the circuit I'm simulating: Here is the plot of R1 and V9: Seems like the voltage spikes over 20V ...
lasb3tas's user avatar
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Grounding in power electronics

I'm designing a three-phase inverter and have been looking up information online with respect to grounding, which led me to a somewhat misapprehension. In my system I firstly planned on separating the ...
Je parle avec toi's user avatar
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1 answer
110 views

Can I convert a step down transformer to step up? [closed]

I have a center tapped stepped down transformer 12-0-12 240 V. I need to convert it to a step up transformer 12 V to 240 V and I need it to be centre tapped. I am making an inverter circuit to convert ...
Kevin Pereira's user avatar
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56 views

H-bridge output voltage ripple

I have built this H-bridge. I have a problem with the output ripple. I have used an RC snubber circuit (10,30,50 and 60nf with 5 ohm,) but still have the same problem. I checked the gate signal. It is ...
Deia Deen's user avatar
1 vote
1 answer
75 views

Using a capacitor to handle the inrush surge power of a fridge

I have a household mini fridge connected to my off grid electrical system, and recently I bought a smaller inverter just for the fridge so that I can turn my larger inverter off to reduce power ...
jechen95's user avatar
1 vote
1 answer
88 views

3 phase 4 wire inverter output common mode choke selection

I designe and develope a stand alone 3 phase four wire inverter that it works with unbalanced output currents. The standard 3 phase 3 wire inverter output are used common mode choke like this (RB6132-...
AdamZilahi's user avatar
3 votes
1 answer
117 views

Duty cycle in Sine PWM and Conduction Losses in a MOSFET [closed]

I'm trying to understand an analytical expression for conduction losses in an MOSFET based inverter. In the derivation given in a paper, the usual starting point is the definition of the duty cycle: &...
hadhiq's user avatar
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-2 votes
1 answer
81 views

UPS cord has back-flowing current in it. What to do? [closed]

If the UPS is switched on and it's unplugged from the wall socket, then there's some current in the plug pins as per my neon line tester. It's a three pin plug. The earth pin has no current but both ...
Ojasvi Srivastava's user avatar
2 votes
1 answer
134 views

Running a TV Using Only Solar Panel, Without a Battery

Objective I would like to power single 49 inch TV (LG 49LF6300) using only solar panel without a battery. I am aware that this will only keep the TV running for a few hours each day but this is not an ...
Chris Aung's user avatar
1 vote
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CMOS Inverter Transistor Sizing Wording

"Assume that both the gate lengths as well as W_n for the 180 nm technology in the table can have dimensions down to 180 nm." I'm simply wondering here what they're referring to with the &...
Moquec's user avatar
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Right SMPS for gate drive in power mosfet

I am building a 48v, 2kw sinewave inverter based on EGS002, in order to drive spwm & control circuitry, I need to step down 48v to 12v. Interestingly I found Hilink's 3w (0.25a) and 10w (0.83a) ...
duckduckgo's user avatar
3 votes
3 answers
142 views

Is it always given that ground has lower resistance than output even If output is far closer in an inverting nmos? [closed]

Currently I'm learning about MOSFETs (N-MOS and P-MOS) --basically how a transistor works. My question is why does the current always prefer the grounding output even though it is further away than ...
Callidus's user avatar
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PMSM - Motor values for a simulation

I have a simulation of a PMSM using a ElectroCraft RPX22-042V24 Motor. For some testing purposes I need to increase the rpm by a lot. I am thinking about 30-40 000 rpm. Of course I searched for a ...
hanss's user avatar
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1 vote
1 answer
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High voltage DC to AC oscillator circuit [closed]

I am trying to design a oscillator circuit that will convert ~10 kV DC at 60 hz to ~9-10 kV AC at 60 hz, and all the information I'm seeing is circuits that step up voltage. I wonder if making this ...
Bruce Smith 's user avatar
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49 views

How to calculate or estimate power inverter's peak power

What should be fine to consider as peak power output of an inverter when a motor starts for example? given that: Capacity (Rated Power): 935VA / 12 V Solar UPS Overload:110% Solar UPS Short Circuit ...
USER249's user avatar
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P-Mosfets to turn on/off a BLDC motor , after the 3 phase inverter Bridge.. Will it work?

I have a brushless sensorless closed-loop motor driver, like the one in the schematics. It uses a constructed virtual neutral point and some resistors to "read" the Back-EMF from the motor. ...
Rodrigo's user avatar
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0 votes
1 answer
77 views

SMPS transformer power capacity and product of Area

I was working on the SMPS transformer and wanted to wind my own. For that I found the initial step of power calculation of the SMPS transformer. It stated to find the power using the products of area ...
kam1212's user avatar
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2 votes
1 answer
72 views

Practical Considerations for a Square-Wave Inverter [closed]

I'm hoping to understand some practical considerations for a square wave inverter. Particularly, is there additional circuitry I need around the transistors to ensure proper operation? (e.g., ...
pbandlead's user avatar
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0 answers
73 views

Electronically controlled variable AC-AC and DC-AC

I've seen devices (and saw answered questions) that are somewhat similar to what I want to do but I haven't found exactly what I'm looking for. I want to control a power supply with my Raspberry Pi ...
iPaul's user avatar
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Could an IGBT gate driver be used to drive a SiC MOSFET?

Can we use a single channel HV IGBT gate driver with galvanic isolation which is previously mounted to derive a 1200V IGBT for 800V inverter application? Can the same gate driver drive a 1200V SiC ...
Alison's user avatar
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Can you use a BTS7960 43A module as driver for a SPWM tranformer inverter

I have a crazy idea, the BTS7960 43A is a PWM motor driver module. It's maximum PWM frequency is 25Khz, and the build in MOSFETS have a quite low RDSon. So I was wondering if I can use this module as ...
wogoos's user avatar
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0 answers
130 views

How do I calculate Trise and Tfall for a cmos inverter?

I am an undergrad student and learning about mosfets as well as inverters using mos. I wasn't able to find a clear formula anywhere regarding the rise and fall times during switching between logics. ...
fat_gladiator17's user avatar
1 vote
0 answers
65 views

How is soft switching in a PMSM inverter achieved?

Recently I found some papers about PMSM drives that use the regular circuit of 6 e.g. IGBTs to drive a permanent magnet synchronous motor but with a resonant circuit in front of it to achieve zero ...
hanss's user avatar
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Method of paralleling VFDs over DC bus bar

We have some VFD with considerable power output. There are some issues around stable operations. However we found out, that the layout is somehow special. I added a single VFD, a simplified diagram ...
Ariser's user avatar
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Measuring voltage on an edison outlet in a hybrid vehicle

Forgive me for what may be a fairly basic question, but I'm a student and I just happened to run into this while doing a recent project. I own a hybrid car, and in the cab is a 400w inverter with a ...
SourceFour's user avatar
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0 answers
50 views

Half-Bridge inverter with IR2110, high side control signal diverges

I am designing a single-phase half-bridge inverter with SPWM modulation on LTSpice, the SPWM control signal is 10 kHz and the reference sine wave is 50 Hz. Initially the simulation seems to work, but ...
matteo morawski's user avatar
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1 answer
66 views

Does this inverter gate need a decoupling capacitor?

I found that most data sheets show that ICs need a decoupling capacitor. Does the SN74LVC1G04 inverter need one also? The datasheet does not seem to show one.
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