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Questions tagged [inverter]

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

2
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1answer
57 views

Sinusoidal Inverter

I purchased a pure sine power inverter and noticed on the back there is a warning: "Notice: The output of this device is not sinusoidal. It has a total harmonic distortion of 3 percent and maximum ...
0
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0answers
21 views

Why Dspic304011 Controller's PWM stucks to 50% duty cycle when DC link Voltage is turned onn before the gate votlage turned onn in SPWM inverter.?

I have implemented SPWM inverter that take input from grid (230V AC) and convert this to DC link voltage 320V and this DC link voltage is converter to desire frequency. The gate driver IR2136 is used ...
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0answers
19 views

Servodrive failure

Lenze make servo drive is failed only for the reason of power failure. Dc input through inverter 560 voltage input supply Why it is failed during power failure
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0answers
20 views

Solar inverter installation [migrated]

A reputed solar installer is telling me that I can install more than 20 A worth of solar on a 100 A Main Service Panel (MSP) which has 100 A busbar rating only. According to him it can ...
0
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1answer
49 views

Power inverter - what component blew

I have a new 2 kW inverter connected to my 12 V lessure battery. As soon as I had plugged a 1 kW appliance into it it blew. Pic shows a component that looks like it's melted. I'm very limited with ...
2
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1answer
83 views

Constructing a 12VDC to 230VAC 1-phase inverter

Can anyone help me check why the inverter circuit I built outputs only 165 V at no load instead of the proposed 230 V. It can't even light a bulb because of that. I tried adjusting values of filter ...
0
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2answers
45 views

Using a 12V battery while simultaneously charging via Heavy Duty battey charger

Very similar to a question asked and answered but using solar panels.. BUT this time I'm asking, Can I use my 135Ah deep cycle battery to power a 2000W inverter and at the same time charge my battery ...
0
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0answers
41 views

Mosfet Gate Pull-Down and Gate Resistor Failure

I'm trying to make an inverter which has a dc bus of 350V and output of 220V(spwm). The problem is I've run the circuit two times and in the first one the gate resistors explode and in the second one ...
1
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1answer
46 views

Solar inverter stops drawing power from PV

I have 3.2 kVA solar inverter with MPPT charge controller along with six 340 W solar panels installed. What I have noticed is that the inverter stops drawing power from PV though there is bright sun ...
0
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2answers
64 views

Using solar with a 3 phase motor to generate stable 3 phase current

I have a 220 V 100 hp electrical motor. I initially had a plan to use the grid 110 V through a step up transformer to get to 220 V along with a 480 kVA capacitors to kick ...
0
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2answers
53 views

Basic questions about output impedance of a logic inverter using an NMOS

I have drawn below an NMOS logic inverter and its equivalent circuit for HIGH state: 1- Why is this gate said to have high output impedance at HIGH state? Is that because of the open switch or ...
0
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2answers
102 views

How find the optimal frequency of a high frequency transformer

I have disassembled a "Chinese" power inverter, I found a High-Frequency Transformer, with no label on it. I would like to make an inverter using this transformer to generate the High voltage to feed ...
3
votes
1answer
55 views

Brake Resistor in Regenerative Case for Elevator

I am trying to understand the switching pattern of Inverter and the Brake chopper while a 3-phase AC motor is in regenerative mode for example in Elevator case: When its Cabin is full and it is ...
4
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4answers
337 views

Is DC-to-DC (24 V to 12 V) buck conversion typically more efficient than AC-to-DC (110 V to 12 V) conversion? [closed]

While building an online UPS system, I'm basing the choice to eliminate as many AC inverters from the system as possible because of the assumption that DC-to-DC conversion is more efficient than AC-to-...
1
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0answers
29 views

MOSFET Choosing For SPWM Inverter

I'm trying to build a 220V spwm inverter with 30kHz carrier freq. with 350V input and 7A output current. I'm trying to choose suitable mosfet but I'm very confused about dv/dt, reverse recovery(body ...
0
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1answer
69 views

Can I use 12 V 7 Ah battery with 700 VA inverter?

I already have a 12 V 7 Ah battery. Now I am planning to buy an inverter which is 700 VA. Can I use that battery with this inverter? Will it be safe? Regarding load, I will only use 2 ...
0
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1answer
38 views

Intelligent IGBT Module for Motor drive [closed]

I am looking for IGBT module for motor drive.. Approx. 50A, 1200V rating. 7 Pack module, Including Inverter + Brake circuit + Built-in drivers For this I have found a module and it's datasheet ...
0
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1answer
23 views

CMOS IC Dynamic Edge-Triggered Flip Flop setup and hold time calculation

Before explaining i should point out that i refer to changes of signals in the text as a reference change on which i will calculate these times as 50% change of one signal to 50% change of the other ...
0
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1answer
60 views

Parallel AC Sources

Hello. I am new to electricity. I currently have 3 DC-AC inverter to drive 3 EL Wires(electroluminescent). The input of the inverter will be 12VDC and the output will be 90VAC. I would like to ask ...
0
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0answers
68 views

DC-AC converter draws large current

I am planning to build a circuit that could convert a DC voltage (i.e. 18V) to an AC voltage with frequency f=1kHz and Vpp=36V. Here is my schematic in Orcad Capture Lite. The main idea is to use an H-...
1
vote
1answer
66 views

Seeking simple circuit for converting 5vdc to ~15vac

I picked up some sample smart materials because I have a small project that I want to put 'magic glass' on the outside of so to speak. I picked up a couple of different sample pieces from a couple ...
0
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0answers
46 views

Problem with Line to Line Voltage Output in 3 Phase Inverter MOSFET Bridge Circuit

I have a problem in my 3 phase inverter circuit output. Below, i've attached an image of my circuit. As you can see, i have 3 outputs. There are R, S, and T. So, i've measured line to line voltage ...
1
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1answer
40 views

IR2110 - Open Collector Output Problem

I'm trying to design an inverter and I'm using 2 IR2110 as gate drivers but my MCU board PWM outputs are open collector, I've added a pull-up and transistor to feed IR2110 with 5V pulses but it's not ...
0
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0answers
56 views

Problem with driving inductive loads with inverter

Newbie here. I've got this old line interactive type UPS which cannot drive any inductive load. I suspect the issue is with inverter side of the cct as there is no issue when the commercial supply is ...
1
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0answers
92 views

How can I change a DC current to a 1.7/2.4 MHz AC current for piezoelectric device

I would like to start by saying my experience in electronics is very limited and I will include pictures of everything. I am, however, trying to assemble a device which puts a current through a ...
0
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2answers
36 views

ESP8266 GPIO2 - invert logic NPN transisotr

I make big mistake in my design. I connect output to ESP8266 GPIO2 at this pin I got base of NPN transistor to control LED. I test it on breadboard but probably by noise or "universe magic floating ...
0
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1answer
34 views

Low current RPi GPIO inverter

What is the lowest current way of inverting the output from a GPIO pin? I have a solar board that has an add-on that can turn a USB port power off if a LiPO gets below 3.3v. The problem is, they ...
0
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0answers
71 views

Choosing an inductor value for use as the load in a half bridge inverter circuit

I am making a half-bridge inverter circuit, firstly I have made it in LTSpice to simulate it and plan to build it in the lab. I will initially use a Vrail of 40V but plan to increase it above this, ...
0
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3answers
79 views

NPN inverter alternative that takes up less space on the board

Here I have an NPN inverter circuit which consist of 2 separate NPN transistors and 3 resistors. It does the job, but it takes too much space on the board. Is there any alternative to this circuit ...
0
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0answers
34 views

Inverter Upgrade

I have 600VA, 12V Pure Sine Wave Inverter (Atleast under no load, its pure) having 8 IRF3205 Mosfets in total. (In full bridge configurtion) I have modified its shunt. Now it do not give overload ...
0
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0answers
16 views

Detailed information on how to model single phase and 3-phase inverters in Matlab simulink

I am undertaking a research in renewable Energy. Please,can you help me with detailed information of how the Simulink model for a single phase and 3-phase standalone inverter can be modelled and how ...
0
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1answer
68 views

Minimum Effort to Run a 1100W Hot Air Brush from America to Japan?

I'm entertaining an idea of making a small power supply to get a certain hot air brush (For hair styling) to function on the Japanese power grid. I like this hot air brush that runs only on 120V/60Hz ...
0
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2answers
100 views

Why Positive-going clock transitions used in certain ICs

Why do certain ICs like 74ALS174 use an inverter so as to make a Positive-going clock transitions occur instead of Negative-going ? Why can't we just save expense of an inverter by removing it and ...
1
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1answer
58 views

SG3525 Closed Loop Inverter Waveform Problem

I'm using a sg3525 ic on a full bridge dc-dc converter in closed loop. The system is working fine, I don't have a problem with it. Output is just like what I want. The problem is inverter part's ...
0
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0answers
32 views

transformer to work in sinePWM waveform

How to design a transformer working with PWM waveform with the following data: fundamental frequency:50Hz, PWM switching frequency 10kHz. The transformer secondary should also be a PWM output, just ...
1
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0answers
38 views

Powering refrigerator using solar inverter

I have got a 3 kVA (2400 watt) solar hybrid inverter (pure sine wave) which is connected to a 1280 watt PV array and 2 x 12 volt 150 Ah batteries. It is supposed to switch to utility mode if the ...
2
votes
1answer
69 views

Strange voltage reading on ungrounded system

On a small scale off-grid PV project I received a strange voltage reading and I am hoping that some folks here could possibly shed some more light on what exactly was going on and why. Here is the ...
0
votes
1answer
90 views

Can multiple microinverters, connected in parallel to a single source, become unstable?

Just to get this out of the way, I realize that what I'm exploring is well outside the design specs for the hardware I'm using. Now that that's out of the way: I have a large lithium battery module ...
1
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1answer
37 views

DC bus correction for inverter VFD via PWM modulation

This is a question concerning an inverter circuit without PFC. Single phase AC is rectified and pooled on DC bus capacitors. From there the DC voltage is modulated at 5kHz on 6 IGBTs, emulating ...
0
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3answers
55 views

TTL square wave inverter adjustable duty cycle

I am an amateur and I don't have experience with logic circuits so please forgive me if this is very simple. I have a 5V TTL crystal oscillator (4-pin). I need to create a second square wave from it ...
0
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0answers
97 views

inverter circuit

My inverter only produces about 8 volt output while the supply is as high as 20vdc, what's wrong with my inverter circuit ? ...
1
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1answer
66 views

Why use many-pole motor for high speed?

I found in this teardown analysis of the Nissan Leaf drive motor that it runs up to about 10,000 RPM but is an 8-pole motor. My understanding is that the inverter cost goes up with frequency. The Leaf ...
0
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1answer
38 views

Signal Period of each stage in a ring oscillator

Considering the following ring oscillator: I know that the Frequency at \$Q\$ is given by $$f=\frac{1}{2*t_{PD}*3}$$ Yet I want to calculate the period of each signal at \$V_{1}\$,\$V_{2}\$, and \$...
2
votes
2answers
32 views

R_on for inverter gate

What \$R_{on}\$ do I use to calculate the delay for an inverter gate? In my class we came up with two definitions of \$R_{on}\$, one for saturation and one for triode. Is there a certain mode I ...
0
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1answer
194 views

Converting full adder to subtractor using inverter

I've been trying to convert a full adder to a full subtractor using an inverter. I tried using not gates at the B input ( in A B Cin ) and also using it in the outputs but the final answers are not ...
1
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1answer
141 views

Voltage spikes in h-bridge inverter square wave output

I apologise if this is a repost but I couldn't find the problem anywhere else. I am trying to power an ultrasonic transducer using an h-bridge inverter design to convert arduino signal into a higher ...
0
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3answers
75 views

How is the fuse amp rating determined for a 12V AGM battery bank?

I would like to put 3 x 130Ah AGM batteries in parallel and attach a fuse to the positive terminal of each battery. What size fuse should I use? How is the amp rating of the fuse determined? The ...
0
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0answers
39 views

CMOS Inverter output for a given transfer characteristics

I have tried solving the below CMOS problem with a given transfer characteristics but my answer is wrong. Answer should be 0.25. Could someone please point out where I went wrong ?
1
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1answer
59 views

Creating Neutral node on Three phase Inverter

I want to create a neutral node at the output of a 3-phase Inverter for ACIM. Is it possible to do that by adding 3 resistors at the Inverter outputs and join them together to get the neutral node? ...
0
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1answer
62 views

Two level Inverter [closed]

What thing determines a 2-level and 3-level Inverter as in the diagram? edit: Level is as in 'voltage level'. I have found following good link that explains it. http://www.elkraft.ntnu.no/~richardl/...