Questions tagged [inverter]
Electrical device that converts direct current (DC) to alternating current (AC).
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How to make the output of an inverter using MOSFETs and an IR2104 better using an Arduino
I have been trying to build an 12 V H-bridge inverter. The output I am getting is fine up to 0.5 A as shown below:
When I increase the load the waveform shape changes as shown below. I am using an ...
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Boost inverter IM control by changing dc link voltage instead of the modulation index of the inverter
I have a dc-dc buck-boost converter feeding an inverter in order to control an induction motor. I am using SPWM for the inverter and I am implementing field oriented control for the motor. Instead of ...
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I would like to build a delay circuit
I would like to build a latching relay control circuit, controlled by MCU.
I'd like to implement the following:
The idea is from here: https://pdfserv.maximintegrated.com/en/an/AN3288.pdf
The relay I ...
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H-Bridge blows the fuses in my house
Transistors: FDP18N50
Optocouplers: EL817B
I have been struggling with this for several days. I want to make a 230V AC/230V AC inverter that extends the wave to control the speed of a blower. When I ...
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How to determine parameters for the Resonant Royer (or Baxandall) circuit?
I'm learning about the Resonant Royer circuit (or Baxandall circuit).
There is a picture from the wikipedia(Royer circuit):
Or if you like, you can see my simulation.
I learn about how it works from ...
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Why is the AC voltmeter showing zero volts in this inverter?
I used this video and created this, in Proteus:
When I run it I get zero AC volts:
But the video is showing this:
Why is the AC voltmeter showing zero volts in this inverter?
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110 volt to 220 volt step up converter for air conditioner [closed]
Can I use some kind of plug in transformer to convert my 110V wall sockets to 220V to power a 30000 BTU air conditioner safely? The idea is to put in a 220V window unit in the same room as my central ...
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Electrical Characteristics of Toshiba Mosfets
I have been Searching for power mosfets for designing an inverter. One crucial parameter I was looking for is the Rds_on relationship with junction temperature.
Other manufacturers (infineon, Irf, ST) ...
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How does an IGBT 120A, 450 watt welding machine inverter mechanism work?
How can "RYU Weld Machine Inverter 120A IGBT 450 watt" be advertised so? Does it really output less than 4V?
How is such a rating determined?
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Is it possible to pair MPPT/PWM charger with a computer UPS? Would it prolong the UPS battery's lifespan?
I've an old UPS for my computer which draws 50 W on average and less than 150 W at full load. With the the built-in battery I only have about 10 minutes of backup time.
I am thinking about getting a ...
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EGS002 48 to 220 V inverter using IGBTs
I'm trying to build a 48 to 220 V inverter using IGBTs.
The problem is that when I put on a resistive load (1500 W tea kettle) it works fine, but when I put on a inductive/capacitive load (1000 W arc ...
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50 Hz and 60 Hz combined neutrals [closed]
I have two inverters. Inverter A is producing 220 V, 50 Hz while inverter B is producing 110 V, 60 Hz. Can they share a neutral on the output?
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What happens when a grid tie inverter is out of sync?
Background:
I have a growatt sph6000 tl bl-us which is a split-phase hybrid solar inverter. I purchased this with the assumption that my grid was split-phase, with the two lines offset by 180 degrees. ...
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Difference between Safe Operating Area (SOA) of two MOSFETs
I want to compare the Safe Operating Areas of two MOSFETs based on the graphs given by the manufacturers in the datasheets.
Our application is a 24 V inverter. What I concluded based on the ...
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Can I use an Arduino for controlling MOSFET transistors to make a pure sine wave AC power inverter?
Modern AC invertors use controllers to turn on/off transistors to generate PWM pulses that will become a pure sine after filtering.
Is it possible to use an Arduino as that controller? What cheap ...
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Can a modified square wave (average square wave in each discrete time interval) be made from only full bridge inverter without transformer, LC filter?
I'm studying about inverter PWM with textbook.
The similar one with attached figure is in the textbook.
I can understand how the blue chopped square voltage is made.
In the text book, the red curve is ...
user331400
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How does a transistor inverter work?
When the base of the transistor is LOW, no current can pass through the collector to the emitter and therefore if the current is 0 the voltage is 0 and all current will pass through the resistor that ...
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Help to diagnose 3-phase induction motor stuttering
I’m working on a project where I want to run a 3-phase induction motor (see picture for specifics) using a VFD (Variable Frequency Drive). The VFD I have is a cheap Chinese one (the “T13-750w-12-H”), ...
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9V DC offset voltage at phase out of inverter section
In this circuit, the gate driver is powered with a 12V supply and there is no PWM given at the HI and LI. In this idle condition, I measured 9VDC on the HS pin. Once PWM is given on the HI and LI pins,...
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Why does this inverter use two bridges?
I recently destroyed a 1000 W-rated 24 VDC -> 220 VAC pure sine wave inverter I bought a while back from Ebay, by connecting its output to mains power inadvertently.
Afterwards, I decided to ...
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Stopping electric arcs between layers in PCB - big PCB burn
Firstly, let me preface this with the fact that I am not interested in chastising the user, and I am not interested in looking at the original source of the arc (it was a tool accidentally breaching ...
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How should I correct this NMOS static inverter?
So in my notebook I have this circuit scheme for a NMOS static inverter:
Vi is the input
Vo is the output
VDD is the voltage source
It is obvious that the M2 MOSFET will never turn on. Is the circuit ...
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Inverter and main panel both have G-N bond. Best way to avoid ground currents?
I am using an inverter that internally bonds neutral and ground. It feeds a main panel via transfer switch (as required by code). Of course my main panel also bonds neutral and ground by code. The ...
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Common mode choke and inductor for inverter circuit
I am building an inverter that uses an H-Bridge and PWM to generate something that should get close to a sine wave. My original design only included a common mode choke, however now that I am doing ...
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What are typical "crest factor" values for significantly non-linear typical household loads?
What are typical "crest factor" values for significantly non-linear typical household loads?
By household loads, I mean anything either plugged in to a receptacle or hard-wired like ceiling ...
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Impact of reverse conduction on control strategy of PMSM motor
On a three-phase inverter working as a Master Control Unit (MCU) to control a permanent magnet synchronous motor, if we replace the IGBTs with SiC MOSFETs, what could be the possible impact of this ...
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How does a power generator control its output to the grid?
I found this answer: On-grid solar system - how to control power out from solar system to grid?
But I would like to know a little more about the details and the dynamics of the inverter. As an example,...
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Electric vehicle charger input to inverter
I am based in the UK. I have an electric vehicle charger:
Built-in protective earth neutral (PEN) fault device
Dynamic load balancing
Power output / max current: 7.4kW / 32A
Nominal supply: 230 V AC,...
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Can I use a device of 100-240 V~, 50/60 Hz on a 720 W/1200 VA inverter? [closed]
I am using an inverter back-up power solution device with 720 W/1200 VA output capacity.
I have connected a sound speaker with the below specs:
Input voltage: 100-240 V~, 50/60 Hz
Input current: 200 - ...
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LC filter in inverter
I am in the process of creating a high-current inverter, with a current rating of 100A. I have completed the simulation, but am having difficulty finding an inductor with a high enough current rating ...
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MOSFET gate drivers with LM339 and totem pole transistors in H-bridge
I found this H-bridge driver configuration in a UPS (220 V, 50 Hz, 360 W, PWM frequency is unknown) board.
In the UPS, V3 input was controlled by an MCU and in my configuration MCU works at 3.3 V ...
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Why is the load connected to the batteries instead of the load output of the controller?
I bought a small photovoltaic kit to do some experiments.
It is composed of:
PV panels
charge controller
batteries
inverter
In the controller's manual there is this connection diagram:
It makes ...
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Driving H-bridge with IR2101
I found a 500W inverter implementation with an Arduino Nano and IR2101. According to its schematic, I think the input connections of both IR2101 are wrong. If it is wrong, then why is this circuit is ...
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What's the reason for large VA vs W difference in an inverter?
I'm using a new set-up of a 3.6 kW inverter with two 150 Ah gel batteries in series.
I don't understand why the inverter reports a much larger VA than the watts that are consumed. As I understand it, ...
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How to include dead times into the model of the three-phase voltage source inverter?
I have been developing a Scilab model of the three-phase voltage source inverter. I have started with the idealized model where I suppose that in each of the inverter leg one transistor can be turned ...
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Can I connect a separate charger and inverter to use a LiFePO4 battery as a backup for a household pump?
I have the following equipment and want to know what I need to make this a functional battery backup for a sump pump.
12 V, 100 Ah Smart LiFePO4 battery
Victron BlueSmart IP65 Charger 12 VDC, 15 A
I ...
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Reverse Conduction/Third Quadrant operation of SiC MOSFET
Good Day,
I have to calculate the Conduction losses of SiC MOSFET and how I am calculating total losses is by segregating the losses into three categoriesincludes, Forward Conduction loss of MOSFET, ...
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PWM in H-Brigde for Low-Frequency Inverter
I'm trying to make an H-bridge for a low-frequency inverter circuit using this reference implementation from Texas Instruments:
650-W Power Stage Without Heat Sink Ref Design or Low-Frequency Offline ...
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Do I need to insulate the case of an electrolytic capacitor from ground? [duplicate]
I'm designing a motor controller, and I'm trying to understand if I need to add insulation between the case of the bulk input capacitors and the grounded aluminum heatsink. I know that relying on the ...
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NPC multilevel inverter - why are these diodes reverse biased?
Let's consider the three phase multilevel NPC inverter shown below.
Let's focus on the first phase leg in the occasion when we want to get v1 = Vdc/2 as output phase voltage, as shown in the picture ...
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Understanding maximum safe operating area and duty cycle for MOSFETs
I want to figure out the maximum continuous average power I can get from a MOSFET from the "Maximum Safe Operating Area" graph. For my example case, I chose CSD19535KTT (just because the ...
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How can earth be connected to neutral?
I recently installed a solar inverter in my house and learned that earth must be connected to neutral. I am very puzzled by this, since AC changes direction of current flow, so according to me, there ...
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Output voltage halved in 3-phase SPWM inverter simulation
I am just trying to simulate a 3-phase inverter connected to a star-connected load controlled through sine PWM modulation.
In real life, I would expect a carrier that would go from zero to one. As ...
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How does phase angle and modulation index in a SPWM Inverter control active power and reactive power flow in a grid tied inverter?
I was going through control of grid-tied inverters in distributed generation systems. In such systems, the DC link voltage should be maintained at voltage level higher than the peak of the grid ...
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12 VDC to 380 VAC for 1 kW, 3-phase motor
What is the cheapest way to run a 1 kW, 3-phase motor for about 20 minutes on a 12 VDC battery?
Will it be a 2 kW inverter to power a VFD or is there something else?
And will a 100 Ah battery do, and ...
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How to control the speed of an AC motor with DC voltage programmatically?
What I want to achieve
To control the speed of an AC motor with DC voltage programmatically with Raspberry Pi.
I asked on Raspberry Pi.SE and was told it was an EE question, so I'm asking here.
...
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Battery pack sudden voltage drop
I made a 4S battery pack from used Samsung ICR18650 batteries (it's just for fun and overnight camping, also, I got around 500 free used batteries from a friend).
I connected it to an inverter, and ...
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Pump undervoltage protection
I'm planning on building a solar powered pond filter for my koi pond and my setup goes like solar panel to charge controller to inverter module to pump. I have tested the setup and it works when the ...
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Texas Instrument OPA192
I'm examining the datasheet of the OPA192. When the inverting input of op amp tied up the op amp output and if the non-inverting input of op amp had been floating, what would have happened the op amp ...
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Should I separate power ground from control ground?
I am designing the single phase inverter. The input of the inverter is around 35 Vdc, and output is 24 Vac. The output currents will be below 1A. I control the inverter with F280039C from TI on a ...