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Questions tagged [inverter]

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

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59 views

What's the magic behind inverters?

I'm having hard time understanding how inverter works and why it works. I mean why is it possible to power a say fridge (220V AC) with a 5v battery using a 5v to 220v inverter ? And since this is ...
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70 views

Does the lack of a primary DC blocking capacitor cause my tesla coil driver to explode?

Lately I've been tinkering with an SSTC half-bridge driver. I've ran a couple of tests using relatively low input voltages ~50V and the IGBTS seemed to do fine, there was no noticeable heating at all. ...
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28 views

abc dq transform for inverter inner and outer control

Good day all, I am learning inverters (VSC) and their control of inner and outer loop which are current and DC bus voltage control respectively. I understood the current control and it seemed to me ...
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26 views

Injection of active and reactive power for votlage regulation

I am currently investigating voltage regulation by injecting/absorbing active/reactive power through grid-tie inverters as you can see in the figure below. So, I am conducting some simulations in ...
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2answers
54 views

Modelling 3-phase induction motor and filter for inverter output in LTspice

I am designing an inverter in Ltspice and am looking to have a simple circuit to represent the motor load and filter out the PWM harmonics in order to obtain outputs. The motor characteristics are: ...
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35 views

Voltage controlled versus current controlled Inverter

I would like to ask about the voltage and current controlled inverters. In a current controlled inverter, the control target is the output current and they provide high quality current to the grid. ...
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1answer
30 views

How to maintain a stable voltage on a Wind Turbine for Inverter

I'm doing some experiments on a wind turbine in my spare time. At the moment, my system runs well and I can measure good output values from my generator. For example: 38V @18Hz at 30 RPM 97V @37Hz ...
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12 views

UART Current in PIC18F46K22 & 7404 Input Current

I am currently making a decision to invert the UART signal from my PIC18F46K22 and have 2 choices to either use 74LS04 and 74HC04 but there is a difference between the LS and HC that the LS can output ...
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1answer
46 views

(inverter repairs) Does reverse polarity can kill power MOSFETs in UPS inverters? [closed]

I had an old computer UPS (almost 7 years) and I modified it to use external battery (a 12 Volt motorcycle battery) since the old 12 Volt battery is completely dead and no replacement is available for ...
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2answers
131 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 ...
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1answer
32 views

Slew Rate related EMI: How relevant is it for motor control circuits ?

I am designing a 3-phase inverter board for BLDC Motor control. The H-bridges i use are IFX007 from Infineon. The mentioned IC has the possibility to adjust the slew rate. From what i have read, i've ...
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21 views

3 phase LC filter connection

I'm currently working on a three phase voltage source inverter for driving an induction motor, I know how to design an LC filter but my only confusion is how to connect the capacitors (delta or star). ...
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1answer
46 views

Output voltage of 3-phase in / 3-phase out inverter

I am using UK mains (230 V phase, 400 V line) to drive a Japanese motor expecting 115 V phase, 200 V line), presently using 2:1 transformers. I would like to control speed between 30 and 70 Hz, ie +/- ...
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31 views

how does a modified three level Inverter works?

As you see in the figure below, a modified three level Inverter with its explanation. for me, when the T3 is on during the positive wave, the output voltage is zero no matter what the high buck ...
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19 views

Sg3524 power inverter ic with IRF3710 Mosfet

i have a power UPS that have an sg3524 ic for frequency generation and 4 x IRF3710 mosfet for inverting. I am planning to incrase the output watt for this inverter by using of IRF460 since its 280W ...
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2answers
55 views

LTspice- Huge current spikes across MOSFETs in full-bridge inverter

I have designed a simple full bridge inverter in LTspice. The outputs for voltage and current are as expected however I have huge current spikes across the MOSFETs which I am using as switches and are ...
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1answer
34 views

How does the transistor topology look like for a gate of this logic inverter?

How does a single inverter gate of this hex inverter, look like in transistor level? I don't mean the actual photo, but how does the transistor topology look like? Does the BJT inverter (see below),...
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53 views

Inverter with PWM: Modulation Index

I model an photovoltaic inverter in simulink. The Inverter has a PWM, a current control and MPPT. The PWM pulses are generated by comparing the reference sinus signal with a triangular signal. The ...
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1answer
46 views

12Vdc to 45VAC inverter

I would like to make an inverter from 12Vdc to 45Vac. I am trying to simulate it into LTSpice but I can't get a Frequency of 60 Hz. Here is the Schematic: BOM: Q1 & Q2 : 2N5877 R1 & R2 : ...
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81 views

How to get 50 Hz sine wave from inverter bridge driving PWM pins of MCU

I am using this circuit to see the sine wave coming from a DsPIC Pins to check the shape of sine wave created from my sine table. PWM frequency is 18 kHz But the sine wave does not seem to be ...
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1answer
56 views

Running Washing Machine from an Inverter [closed]

I run the house on a solar power source through a Trace DR2424E 2500 inverter. Everything works great except for the washing machine. I can't get the washing machine to work unless I put heavy load on ...
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1answer
29 views

Power converters Modelling - NPC versus no NPC

I am trying to simulate a three-phase inverter in Matlab/Simulink. So far I figured out that in the Simulink library there are two types of inverters. The first one is illustrated in the figure below ...
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84 views

LED's brightness difference in these 2 circuits

I have past exam's problem as follows. Suppose there are circuit A (left image) and B (right image). The question is why LED in circuit A is brighter than in B. The solution states that the Low-level ...
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1answer
33 views

Why does my 3 V EL inverter make sound?

The question is purely academic, as normal sound dampening solutions seem to work fine. I understand how electronic circuits make sound as per this answer: How can "purely" electrical ...
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1answer
56 views

Is the voltage supplied by an LCD backlight inverter in a laptop dangerous in any way?

It is my understanding that in a laptop, voltage from a low voltage (say 10V) battery can be converted into higher much higher voltages by way of inverter for an LCD display module. Is this voltage ...
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61 views

Inverter Design - High Side MOSFET - Slow Switch Time

I've posted previously on a similar issue which can be found here Overview: My design is a 3 phase inverter with: MOSFETS are STF10N60DM2 Gate Driver is 6EDL04N06PT I'm using only a single high ...
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2answers
30 views

Measuring battery voltage in PV scenario with MPPT charge controller with inverter

So I'm doing a PV project with wifi enabled statistics. I'd like to see the watts coming in and out and the battery charge level, estimated battery charge and discharge time. I'm designing PCB to ...
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2answers
95 views

Why is my oscilloscope reading jittering, and how might I fix it?

I've made a simple inverter circuit and I've read the voltage across the load resistor using a RIGOL DS1104 oscilloscope. Here is the link to the screen capture. I'm using a full-bridge inverter ...
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2answers
51 views

What is the error in my circuit in Simulink?

Please see the image below. I get this error when I try to run the circuit on simulink. Series RLC branch and Series RLC branch 1 refer to the two DC-Link capacitors of the inverter on the left side ...
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0answers
23 views

Sinusoidal Pulse Width Bipolar Modulation Scheme : Harmonic Spectrum

I was reading about the SPWM Bipolar Scheme for inverters the book said that we choose the frequency modulation ratio be odd to obtain only odd harmonics. What happens if we choose the frequency ...
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1answer
59 views

Why is waveform of the voltage across the DC-link capacitor alternating?

So I am connecting a full-wave rectifier to a half-bridge inverter as shown in the circuit below. I added a smoothing capacitor of 0.47 Farad to get a smooth DC output voltage (see the first graph), ...
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1answer
56 views

Non-inverting op amps with sensors [closed]

I would like to know if there's a negative implication of using non-inverting op amps with sensors, for example a pressure sensor? Would it be a better option to use an inverter, and if it is, why?
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143 views

Zener diode at inverter op amp's output

I would like to know what would be the effect of placing a Zener diode between the op amp's output and the actual output of the circuit like shown in the schematic. The Zener should be of 5 V. ...
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1answer
34 views

Should a off-grid wind charge controller be UL certified? [closed]

I recently bought a 2kW wind generator, 48V Charge controller and a UL certified off grid wind inverter for my Home based wind project prototype. My charge controller which I am using to rectify the ...
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1answer
66 views

How to increase low voltages modified AC Sine wave up to 220 VAC with 0.25 Watt?

I am working on Multilevel Inverter and successfully achieved modified sine wave with 7 level, that is much better according to my requirement. But the problem is output AC voltages is too low which ...
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1answer
113 views

Best way to convert 48VDC to 220VAC Pure Sine

I'm trying to convert 48VDC(input could be battery or not), to 220VAC(Sine) I've searched a lot and found different topologies so I'm not sure about which one to use. I'm expecting to have a 1600W ...
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33 views

Design methodology - Single-Phase vs Three-Phase Inverter

I simulated a small DC Microgrid in Matlab/Simulink. In order to connect the DC bus of the microgrid to the AC grid, I used a three-phase - two-level inverter. I have done some research and I found ...
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32 views

How to calculate the output voltage of a full-wave rectifier if the output is connected to a half-wave inverter

I am using PSIM, and I want to connect a single-phase full-wave rectifier to a half-wave inverter, as shown in the image. I know that the output of a rectifier depends on its load type, so what should ...
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1answer
48 views

Decreasing the surge power of the AC loads

I have a pure sine wave inverter 12v to 220v AC, its continues output power is 600VA and the surge power is 1130VA, I want to running my 200W fridge, but unfortunately my fridge surge power is a bit ...
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1answer
40 views

Reactive power compensation through grid connected inverter

I recently designed a bidirectional DC-DC charger for an Electric Vehicle (EV) battery. I would like to focus on the inverter control. In this application, I designed the inverter to have unitary ...
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2answers
177 views

Battery bank system for a load of 1600 Watts

How many batteries of 12 V x 125 Ah needed to continuously run a load of 1600 Watts using an inverter of 24 VDC x 120 VAC that uses a battery bank as primary source? For a load of 1600 W , at least ...
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2answers
61 views

Is 240V to 24V DC PSU to 120V 60Hz inverter a low cost way to convert 240V 50Hz to 120V 60Hz?

I've been looking at the companies providing step down frequency changing units in the 2000W range, and their enormous size seems to be reflected in an equally enormous price. SO...why can't I just ...
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0answers
20 views

cmos inverter tanner eda

I am trying to model a simple cmos inverter but i am not getting the desired output.I am including the w-edit and t-edit files.
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1answer
80 views

Connecting a 48 V battery to a grid tie inverter

I am working on a grid tied wind system project. I am planning to use a battery in the system which will be the source to the grid-tie inverter. Also the battery will be used only as a source to the ...
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1answer
40 views

LM2776 is it normal to have the oscillations in “bursts”

Is it normal LM2776 to oscillate in "bursts": The frequency of the oscillation is OK, but they come in the 8 oscillation bursts every ~9us. Is it normal? The board design and the schematic is ...
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35 views

What causes my inverter voltage to be weired (TL494)

while trying to build my first switched mode power supply, I have come across a problem which I have no explanation for. "https://imgur.com/a/aveN1G5" Picture one shows the waveform on the inverter ...
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2answers
94 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 ...
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1answer
55 views

Sensor range and speed based on resistor

I have 4 of these sensor circuits and can't quite figure out the optimal resistor value to use. Here's what I assume (which somewhere I may be wrong): The datasheet for the IC states leakage current ...
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2answers
103 views

Amplification of sinusoidal signal from filter circuit

Intention of the project is to obtain sinusoidal signal generator of frequency range 10Hz to 100Hz and 5v signal from microcontroller i.e arduino uno, using pwm from arduino uno I got the square ...
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0answers
35 views

can I add a capacitor in parallel with inverter output to run motor load?

I have a 1000w pure sine inverter 12vdc -> 240vac, and I want to run a washing machine (front load bosch, 24 inch in an RV). The machine starts to cycle, then the inverter overload kicks in when the ...