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

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DC to AC inverter efficiency

What is the current best efficiency in DC to AC invertion, in the tens of kW region? I'm thinking mainly of battery to AC, which is a fairly stable voltage input.
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16 views

Pinout/Datasheet of Delta DAC-08N001 backlight inverter

I'm repurposing a old notebook display for another project but I can't find the datasheet for the backlight inverter. It's labeled Delta DAC-08N001 and has a 5-Pin input connector (as opposed to the ...
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52 views

Why do adapters fail when run on inverters? [on hold]

It may be specific to my scenario, but I have brought more than a dozen adapters of varying voltages from different companies and all of them fail when powered through an inverter, after power is shut ...
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1answer
19 views

In an inverter with RL load, how does an increase in output inductance result in decrease in the magnitude of the current?

In a full bridge inverter with RL load, how does an increase in output inductance result in decrease in the magnitude of the current?
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2answers
44 views

How can I supplement a portable generator during peak load.

I'm contemplating purchasing a 2000W generator, to power some of my tools. One potential issue i that I have a saw that pulls 2500 W at startup and then 1800 w to run. Seems to my that as the ...
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1answer
78 views

Why two resistors at Gate side of IGBT

Why two resistors(R5 and R9) are required at the gate side of IGBT Q3? According to me they are used as potential divider, but can any one tell why it is needed over there? In datasheet it is clear ...
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33 views

PI-filter for inverter

I am to design an input filter for a inverter for a PMSM, and have som question of how to dimension this. We will use PWM for commutation of the motor, probably with a frequency of 20kHz. The peak ...
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2answers
59 views

Mixing two or more AC sources to handle overload

Can I mix two or more AC sources to handle overload and maintain a stable voltage of 230V AC? For example if power from solar panel cannot handle a heavy load can I mix power from different source ...
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36 views

Pure Sinewave Inverter making my Laptop behave Strangely [on hold]

Hi and thanks in advance for your help with this. Ok so here is my issue: I bought a good quality Pure Sine wave 1500w inverter for my car in order to be able to run my laptop etc (when the car is ...
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1answer
48 views

CMOS inverter delay

Please tell me whether my thoughts on the question below is correct or not. How does the delay of a CMOS inverter decrease when we increase the supply voltage? What I thought was if ...
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1answer
69 views

How do I convert 50Hz AC to 60Hz AC using a cyclo-converter?

I want to design a 3 phase cyclo-converter to run a 7.5kW induction motor. The input to the cyclo-converter is 50Hz AC and the output of the cyclo-converter should be 60Hz AC. What are the specific ...
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1answer
88 views

Full-Bridge Inverter

I'm building a Full-bridge inverter with input of up to 36V, Four IGBT are used for switching and embed micro controller for PWM. To drive IGBT I'm using four HCPL-3120 chips. After testing the ...
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49 views

simple inverter simulation in simulink

I am facing a weird problem simulating a rather simple inverter circuit in simulink. The schematic I'm working on is shown below. The oscillograms refer to PWM (a,b,c,d) and output which is 0! ...
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1answer
30 views

VFD and Car Batteries

Can I use a VFD to drive a 3 phase motor if I drive the VFD with 48V from some series car batteries? The VFD has a single phase input and 3 phase output. Is it just a rectifier in there that charges ...
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2answers
368 views

Why do we rectify then invert current in induction heaters?

I was trying to build a simple zone refining prototype, so I thought of How to simplifying induction heater for zone refining? I throughly read What does a beginner need to know to build an inductive ...
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51 views

Connecting the protective ground of a 3 phase AC motor

I am wondering how can I connect the protective earth of my 3 phase AC motor? Here is the background of how my connections are: I am using 3 phase with a neutral point from the mains which goes to ...
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1answer
100 views

NOT gate with an NPN (2N3904) transistor not working?

I have the book Getting Started In Electronics, by Forrest M. Mims III, and it has an RTL NOT gate schematic that looks pretty much the same as this: About a month or two ago, I was starting to get ...
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1answer
57 views

How can I parallel a battery supply and AC supply?

How can I proceed if my battery does not supply all the charge I need and want to compensate by supplying the rest with an AC source connected in parallel with the battery?
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3answers
106 views

Converting battery voltage 12 volts to -5,5 volts at about 3 mA

My team and I are trying to power a sensor. We need to get -5.5 volts and were not too familiar with making or acquiring negative voltages. So it doesn't have to be a 12 volt. Ultimately we'd like ...
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1answer
344 views

What's the difference between a 74LS05 hex inverter and a 74LS04 hex inverter?

It looks like the 74LS05 has "open collector outputs" (not sure what that is) and the 04 does not. Plus, it appears the ...
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1answer
35 views

Operation of this CMOS Logic

I found this CMOS circuit in my textbook. It says that when input voltage is 0V, the output voltage is 0V, and IDN and IDP are both zero. I think that the output voltage is 0V due to some form of ...
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58 views

Prevent desktop from switching off when power inverter switches from mains to backup

I'm using a desktop computer over a power inverter that's connected to a 12V lead acid battery. When the main power supply fails, the inverter switches to battery backup and can power my desktop for ...
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1answer
49 views

DIY power 230v filament bulb off grid [closed]

I need to power a 230v bulb off the grid via solar power. Typically, I would have solar panels that charges some 12v dry/wet cells. These cells will have to supply an inverter that would power the ...
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2answers
76 views

Effective transconductance of a CMOS inverter

If we have a CMOS inverter operating in its' linear region, what would be the effective trans conductance of the inverter?
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53 views

Inverter vs Rotating Machine

My question is in how to relate a 3 phase PV inverter to a classical rotating machine. How is the machines power angle realized by the inverter? In power flow studies, real power flows by ...
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3answers
123 views

Whats the reason for triangular carrier PWM

I understand that triangular carrier PWM uses a higher frequency triangular carrier wave to compare with the desired output waveform but I would like to know more about the process. I've also learned ...
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1answer
50 views

please help me choose power mosfet for multilevel inverter

I am doing my senior project on cascaded multilevel inverter. I am planning to use MOSFETs as switches in my project.Please kindly give me instructions and respective formulas for getting right ...
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1answer
41 views

Calculating Appliance Power Usage from Deep Cycle Battery

I want to figure out a formula for calculating appliance usage from a deep cycle battery and 120v power inverter. I own and operate a hot dog cart. I wish to add an electric grill/griddle to the cart ...
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1answer
48 views

Is there a formula to figure out power loss of a power inverter?

Is there a formula that will give me a ball park idea of how much power I will lose when I run my DC battery bank through a power inverter? Is this something that varies depending on the inverter? ...
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3answers
107 views

Why would a 74LS14 be used to enable another IC?

As a learning experience, I am studying a 64K 80 COLUMN expansion card for the Apple IIe. The model number is ...
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1answer
52 views

Matching impedance of the load after inverting

I have a very basic inverter circuit with a 2n3053. I basically need around 5V at the collector terminal when the base is at 0V. I am able to achieve this provided the load is not connected. When the ...
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1answer
320 views

Control inverter using Arduino PWM output

I'd like to control a frequency inverter using an Arduino Uno board and inverter analog input, in order to control AC motor speed. To do this I need to vary inverter analog input voltage. Inverter ...
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1answer
96 views

How does a DC-AC inverter's DC input current change with time?

Newbie question, would really appreciate some help. I am modelling a simple full-bridge inverter in Matlab. I've used the supplied example file of a full-bridge inverter that was developed by the ...
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125 views

Will this circuit work as a AC-DC-AC rectifier-inverter?

I'm pretty sure I'm missing one or more things from this circuit and can't figure out what (new to this)! The end goal is that an alternating current will come in, run through the rectifier, then ...
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2answers
240 views

Extending the backup runtime of a UPS with an external car battery

I'm looking for a simple/inexpensive way to have a longer power backup time. My fist thought was putting 2 cheap UPSes in parallel. But I quickly found it's not that simple. You would need another ...
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1answer
174 views

what is the meaning of the star on inverter gate?

there is an star sign on the inverter gate in my homework circuit. what is the meaning of it? what is the difference between it and a normal one?
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1answer
121 views

What happens if we run 415V 3 phase motor running on full load on to a 240V 3 phase supply?

I have a 415V 3 phase motor, but during emergency situation a 110V DC to 220VAC 3 Phase inverter comes into place. What will be the effects on the motor
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1answer
66 views

Bootstrap a phase-tracking PV inverter without mains: possible? How?

This question is just out of curiosity. Let's say I have a mains-connected PV system installed over my roof with a phase-tracking inverter. Now main's is out for some extended time and I need to live ...
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2answers
154 views

How to drive an IGBT with an optocoupler?

What's the proper schematic for driving the IGBT (IRG4BC20UD) from a microcontroller (MSP430-g2553) pin through the optocoupler (FOD3184)? I am going to design a full bridge inverter to drive 9W CFLs ...
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59 views

Modified Sine Wave Inverter to power MPPT circuit/microcontroller and Laptop?

I am going into uncharted territory for my senior design project. I need to build an MPPT circuit to efficiently charge a 55AH or 75AH battery. The design because of my lack of programming expertise ...
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3answers
304 views

Simplest possible 5V to +/- 10-15V converter (for op-amps)

Im looking for simplest possible solution to power op-amps from USB or phone charger. Requirements: +5V input voltage ±10V to ±15V output voltage at least 10mA output current on both rails (+/-) ...
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0answers
92 views

Inverter using battery even when mains power supply is on [closed]

All the points connected to the inverter are using battery power even when mains power supply is on. When inverter is turned off , those points connected with the inverter have no power, not even ...
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67 views

Plugging battery backup and AC/DC converter into the same battery

Today, I took one of the UPS (UPS A) the battery out and directly plugged it to bigger 12V battery (so if the electricity is out it stays long). And I also have AC/DC 2000Watt inverter. That inverter ...
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2answers
105 views

Inverting charge pump with boost converter loading characteristics

I've added a test inverting charge pump to an LMR64010 based boost regulator. This regulator outputs +12V (exact value is 11.88V) from a 7.4V battery pack. This is a notated image from a Maxim ...
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49 views

cmos inverter in voltage regulation

How does a CMOS Inverter drives the gate of MOSFET for voltage regulation? I have attached the image for clarification. I just want someone to explain me why two cmos inverters are connected to the ...
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1answer
273 views

Requirements to power 3.5kVa inverter?

How many 200 Watt solar panels do I need to power a 3.5kVa 48DCV inverter for 24 hours if the load on it is 1500 Watts and the batteries are 200Ah, 12DCV each in a country with about 6hrs of sunlight? ...
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29 views

Will grid tie inverter and powerline communications affect each other

Since grid tie inverters "conform" their power to match the frequencies of a home, would powerline computer communications such as this router be affected by or affect a grid tie inverter?
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72 views

MOSFET chip for discrete CMOS inverter

My plan is to build a discrete CMOS inverter(just out of curiosity) out of two complementary MOSFETS. Hence, I am currently looking for a nice pair of complementary MOSFETS, which is quite hard, ...
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69 views

Minimum current to measure from a 30kW motor?

We've been troubleshooting a problem here at work and we're kinda stuck so I thought about asking for some opinion from you guys. We have a 30kW 240V 3-phase motor with a rated current of 109A that is ...
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1answer
123 views

Why would someone use an amplitude modulation ratio lower than one in a power inverter?

We had a test the other day, and there was this question: What is the minimum DC voltage required to drive a PWM, half-bridge, three-phase, power inverter to 4160Vrms. It should be possible to vary ...