# Questions tagged [dc-ac]

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39 questions
24 views

### Size and weight of DC-DC vs DC-AC at equivalent powers

I am looking at designing two power systems for a project and was wondering, at equivalent power, let's say 10kW, what is the system that is easier to design, can be smaller in volume and lighter in ...
150 views

### Single Phase Full Bridge Inverter - I Can't figure out which PWM Control Technique is used

I have the following Single Phase Full Bridge Inverter and a PWM control method which in my language is called "asymmetric mode". I understand how it works but I can't find any documentation written ...
35 views

### Changing AC amplitude and frequency

I'm working on a project for school to monitor a 6 and 15 VAC signal coming in at 11KHz for both. I'm trying to find a simple way of recreating that at home for running some tests on circuits I'm ...
58 views

### High Power Battery System: Variable Input DC Voltage to Fixed AC Output Voltage

We are a team of students trying to build a battery system which would recreate wall socket conditions with up to 2kW output. Some of the main challenges are basically to have the battery's variable ...
180 views

### Converting DC to AC power supply [closed]

I have a simple wiring question. I want to convert a LED light that uses 2 AA batteries, to AC power supply. I have 3 of these lights. I'm assuming each light uses 3V for a total of 9V. I have a 9V ...
120 views

### How to get Convert DC to AC for higher frequency with H-Bridge? [closed]

Require High Frequency AC supply (300 V, 1-2 kHz), as of my knowledge increasing frequency AC-AC is hard compare to DC-AC. So I decided to input DC and get AC of 300 V, 1-2 kHz. Please help how to ...
40 views

### Current input of discmans and walkmans

For discmans and walkmans who operate on 1.5V, 3V, or 6V, what current output (in amp.) of DC/AC convertor, as alternative to using batteries, should be used? The discmans and walkmans do not specify ...
310 views

### PDLC Electrochromatic Film / Switchable Glass

I'm looking to power one of these bits of film with a 12v DC battery. PDLC Electrochromic Film / Switchable Glass https://www.ebay.com.au/itm/200-x-300mm-PDLC-Electrochromic-Film-Smart-Film-Starter-...
78 views

### How to make a 14 VAC power supply powered by a Lipo battery pack?

I've got an essential piece of electronics in my console that requires 14VAC. I'm hoping to build a PSU for it replacing the original wall-wart adapter and have it run off a small lipo battery pack. ...
37 views

### 3v/5vDC to 60-70vAC [closed]

I need to convert 3.3v or 5v to 60v-70vAC (to drive PDLC). The current is very low (few mA). I have tried EL wire inverter, it worked fine but they also make high pitched noise (I assume from high ...
47 views

### Power supply choice [duplicate]

Can I use a 12 V DC power supply for an 9V AC gadget? Does it get too hot? Or can it work safely? I tried it already and it seemed to work. Is it safe? The gadget is a telephone.
123 views

### Can I call this dc to ac

I thought about making the current pass through the resistor the the ground And after switching the direction the ground change to the opposite direction
216 views

### Is it possible to measure the voltage and current of a load with this circuit and Arduino?

I'm trying to measure the voltage and current for a DC-AC converter in my car with Arduino. I know it would be easier, more accurate and cheaper to use breakouts with INA226 like this. But this ...
164 views

### Overheating issues on a dc Generator using a bridge rectifier

I'm setting up a very basic DC generator (powered by pedal power for a cycling charity) and am having issues with our bridge rectifier. It overheats even with no power coming from the generator. ...
289 views

### Simplest Inverter

Theoretically, what is the simplest inverter circuit possible? I mean, really basic. With the least amount of components. It doesn't have to be nice. It doesn't have to step up the voltage, or ...
167 views

### Boundaries between CCM and DCM

I am working on a boost PFC, and I'd like to calculate the boundaries between CCM and DCM, but I don't know exactly how, I tried choosing current ripple = 100% and find the inductance value that ...
65 views

### Power and Power Loss of a DC to AC converter (Motor Driver)

I need urgent help on this matter and I really appreciate it if anyone can clear my doubts! I have a motor driver evaluation board, namely NXP's FRDM-HB2001-EVM, which functions as a simple DC to AC ...
110 views

### Can I convert a 2.5W DC to AC with a 120W DC-AC Inverter?

I want to convert the output of USB to AC voltage, and I come across with this 120W 12V power inverter. Is it possible to step up the 5V DC to 12V, later convert it to AC with a 120W DC-AC inverter? ...
130 views

### Low Power DC-AC Inverter

I'm searching for a schematic of a low power DC-AC inverter, to convert the output of USB, which is in DC to AC for electromagnetic induction application. I'm a self learner, I would like to know ...
340 views

### DC to AC Inverter for WPT

I'm working on a batteryless mouse, and it will be wirelessly powered by the USB (5V 0.5A), however, I already stepped up the voltage to 12VDC. From what I understand, I will need a DC to AC inverter ...
78 views

### Connecting a medium sized 1 kVA Inverter with a 2 kVA Generator

I have a 1 kVA inverter which is using a 12 V battery to generate 220 V AC (battery is connected to a charge controller and is being charged by a PV). In addition I've got a 2 kVA generator. ...
576 views

### How do I calculated the outputted AC voltage of an H-Bridge inverter

I am trying to build a wireless battery charger. Below is a rough idea of what I want to achieve. Currently I am having trouble with the inverter circuit that is shown below. I understand that this ...
49 views

### Variable (Freq. and Voltage) AC Power Supply

I am working on project called "Polarization Modulator". Idea is the having sinusoidal current on the inductor.(100uH) Frequency ( 500Hz - 2500Hz ) and current (peak current) (0A - 10A) on the ...
412 views

### Possibility of using 5A 5-220VDC Solid State Relay for switching 120VAC String Lights

I have purchased this Relay Board http://www.sainsmart.com/sainsmart-8-ch-ssr-5a-dc-dc-5v-220v-solid-state-relay.html This board uses a mager GJ-5FA-L relay with input ranging from 3-32VDC and a coil ...
4k views

### How to increase output power of this simple CD4047 based inverter

I am making a simple inverter using the circuit below. I am using a 3amp 12-0-12 Transformer. I am aware of the cons of the circuit. So, I never expected regulated Pure Sine Wave output from it. The ...
378 views

### Why UPS are not DC output?

A seemingly simple question that bothers me for some time: why the simplest, mass-produced, "offline" (standby) Uninterruptible Power Supplies designed for PC are not having simple DC voltage output (...
830 views

### Simple DC-AC Inverter Circuit not working [closed]

I am just an electronics enthusiast and I want to convert DC to AC. After searching I found this schematic from http://www.electronicshub.org/12v-dc-220v-ac-converter-circuit/ and tried to implement ...
503 views

### DC/AC motor stall current

I'm getting conflicted information about this so why not ask here. To clarify beforehand: Under DC motor I understand a motor with 2 terminals where you apply DC voltage to get current flowing in 1 ...
334 views

### Powering AC Appliance with DC

I have an AC speaker set and it is plugged into an outlet. Then the outlet is put into a transformer where the transformer output is 17V 2.5A AC. Then from the transformer is put through a bridge ...
70 views

### How to find the power dissapation of a resistor

I am attempting to repair a circuit (DC-AC inverter) and have incountered a resistor with discolouration. The measurements indicte a resistance of 1.5Mohms or usually OL leading me to belive the ...
51 views

### lipo pack to 16vac inverter design

Im looking to drive a 16 vac solenoid from a battery pack. Specifically I want an electric door catch to function when mains are down. I want to do this with out with out using a commercial UPS. Im ...
359 views

### 48VDC to 240VAC daisy chain inverters

Is it possible to daisy chain smaller inverters to achieve a higher overall output power? For instance if I have a 48VDC battery bank and I want to power a large compressor at 240VAC it will need a ...
168 views

### Why am I getting only 1.5V across the two terminals of the Load even though the Input voltage is 12V?

I have asked this question previously: Why this pair of IGBT's died silently? Some of those genius people advised me for not playing with high voltages, so I am here with another question with ...
2k views

### Full bridge HVDC to modfied square sine - random half side MOSFET burn

I am trying to make a step-down 350V to 220V voltage converter. I decided to go with rather simple circuit of full bridge MOSFET inverter since my loads are only resistive or switched. I had built it ...
4k views

### dc to ac inverter circuit

I want to design the following inverter circuit, I know the general working of it, but I need some details. in the gates of the FET transistors used in H Bridge there is a design contain 4 diodes 2 ...
217 views

### estimating battery discharge current approximately from ac load current

I would like to know that if we have a data logger installed at a site and the logger measured the constant load current of 10 A from the Grid(Single phase@ 230 v) during a certain time say 10 am. ...
2k 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 ...