Questions tagged [inverter]

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

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24 views

How does the auto-switching work? Dual MOSFET high voltage converter without Gate PWM switching input [closed]

How does the auto-switching work, to generation AC at output with just DC from a battery? Dual MOSFET DC to AC voltage converter/invertor without Gate PWM switching or vibrator/oscillator, but just a ...
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Photovoltaic systems - typical values of electrical current

SOLAR PANELS -> CHARGE CONTROLLER -> [shunt A] BANK OF BATTERIES [shunt B] -> INVERTER - AC OUTPUT What are typical values (to give examples) of electrical current on shunt A (current in on ...
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51 views

Open loop PWM with SG3525

I have seen the same issue posted here with TL494, but The feedback pin set up in that IC, seems to be different- so that I cannot adapt it here. I got an idea about how to implement a closed loop ...
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1answer
57 views

What advantages does CPLD have w.r.t microcontrollers in driving MOSFET drivers in inverter?

I have seen some designs where CPLDs have been used in driving the MOSFET driver in an inverter circuit. What advantage does is provide with regards to driving the same using controllers like TI ...
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27 views

Six-step (trapezoidal) BLDC motor driving strategy

It seems that a common driving strategy for such a motor is to use the 3 half-bridge topology depicted above, and use PWM to regulate speed and/or torque. At any given moment, two phases ("wires&...
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1answer
36 views

Can 1000w inverter with a peak power of 2000w be able to power a 160L refrigerator [closed]

Can 1000w inverter with a peak power of 2000w be able to power a 160L refrigerator,. ( Power ratting of the fridge is 130w/1.3a ).
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1answer
28 views

BLDC motor, typical maximum isolation voltage in DC

For one of 1/3 or 1/2 hp, can I aply a instantaneous 400VDC on it together with PWM (of around 50-200hz), safely? Do commom BLDC motors cumply with that spec?
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72 views

Using LC oscillator to create square wave AC [closed]

A full wave bridge inverter lookslike this: simulate this circuit – Schematic created using CircuitLab However this isn't practical because we have turn on/off the pairs of switches every time ...
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32 views

How to hold inverter output signal?

I am using inverter CD4069UB. It works normally as it should be. when there is no signal output has signal and otherwise not. Just having one problem. When i connect led to inverter output, first it ...
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84 views

Positive edge detection triggers on negative edge too

I have 74LS170s and 74LS670 register files which have the trouble that they are not edge triggered but like SRAM accept data for the entire duration of the write gate being low. So, I have the ...
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Whats the difference between a grid tie dc ac inverter and a normal dc ac inverter for 12 v or 24 v batteries?

what are technically the differences between a grid tie solar inverter, which takes as much power from the connected solar cells as possible, on the dc side, to convert it into 230v ac power and a ...
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1answer
46 views

Tesla Model S inverter DC bus voltage

I was recently researching about this Telsa electric car inverters where i found one intresting thing. Usually in the voltage source inverter the DC bus voltage will be around 600 to 650 V considering ...
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Driving a BLDC motor, having three switches on at the same time

I am currently working on a 14p BLDC motor and I wanted to drive it using 180 degree commutation (having 3 switches on at the time instead of 2). How can this be achieved? how can I know the correct ...
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connecting c10 battery with c20 battery

Has anyone connected a c10 battery with a c20 battery in parallel or series. Will this work? What are the problems of connecting 2 batteries with different c ratings to the same inverter?
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1answer
386 views

What exactly is SVPWM? Is it used in grid-tied inverters?

I've been doing some research on ways to drive the half-bridges in a 3-phase, grid-tied, pure sine wave inverter. I knew about SPWM but not about SVPWM. Based on what I've read, it's superior to SPWM ...
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44 views

BLDC - Single motor for a range of voltage supply with PWM

I plan to use a BLDC motor of around 1/3 hp supplied by a DC rail that is generated from AC mains. If the AC voltage is from 100 to 250Vac, I would have a rectified DC supply of from 141Vdc to 352Vdc. ...
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37 views

Variable voltage DC-AC square wave

I need to power a device with an AC square wave with no DC bias. I have an input DC signal from a microcontroller from 0-5V. I need to use the input signal to create a variable amplitude AC square ...
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1answer
61 views

how to generate 70V AC from TLP222G-2

I have 70VDC 30mA source I need to control optoisolators to generate 70V AC signal I can use TLP222g-2 dual isolators. to build the h bridge I have a single PWM channel from my MCU. Is it possible to ...
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45 views

Beef up inverter by adding more mosfets?

I have a 120 V, 500 W halogen work light that needs more power than my inverter can handle. It is one of those generic 120 W continuous power inverters you find in those jump starter multi tools. ...
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Multiple DP's- impact on grounding?

I'm working on the high level electrical system design for my future 'off-grid' PV-powered retirement home in the rural Philippines. My objective is a design which will provide maximum 'resiliency' i....
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3answers
135 views

Why does my crystal resonate at 4 times the specified frequency?

I have been experimenting with oscillators this week. And building a computer clock. I got two crystals, one at 2 MHz another at 4 MHz. simulate this circuit – Schematic created using ...
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37 views

Designing split-phase grid-tie solar system

I'm in the process of designing and building a grid-tied solar power system, and had I'm having trouble finding a solar inverter that isn't MASSIVE (the smallest one I can find that meets my use cases ...
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28 views

Can I use the ground wire of the grid with the power from my inverter?

In other terms : Can i connect ground wires 1 and 2 together ? EDIT : I'm in France, Grid is connected to a ground rod. System is 230v AC.
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1answer
98 views

Design a 100 watt inverter, but why when the circuit is connected to the power supply sparks out?

I'm making an inverter with 100 Watt power, 220 volt output voltage. The input voltage source of the inverter is from solar panels with a maximum voltage of 18 volts and a maximum current of 5.56 ...
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1answer
22 views

Delta Servo Drive 220V/400V Series

ASDA-A2 Delta Servo Drives including two types: 220V and 400V series that it seems the difference is input voltage of the Servo Derive. but i doubt 220VAC or 400VAC is line to line voltage or line to ...
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29 views

Inverting boost converter by using MC33063A/MC34063A: Where does the IC get ground connection?

I want to design an inverting boost circuit by using MC33063A. I want to generate -5.75V from a +5V supply. My question is, how does the IC connect itself to the ground? The 4th pin is the ground pin ...
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29 views

Half Bridge Bootstrap configuration using IR2184 Gate Driver

I am planning on building a half bridge inverter for use as a tesla coil driver, using a couple of IGBTs, with gates driven by an IR2184 half bridge gate driver. According to the data-sheet, the ...
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65 views

Inverter using Arduino

My thesis is: designing a inverter Control Speed of 3 Phase Induction Motor*(I use arduino nano, 6n137, IR2184, IRF840 and SVPWM)* but the problem is my 3 phase output has very high frequency. when I ...
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2answers
53 views

Can you get 240 volts and 50 amps from paralleled inverter generators?

I'm here for help solving the problem of suppling a 240v, 45amp kiln off the grid. The catch is, we can't just use a large portable generator. So, -can you put three or more inverter generators in ...
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41 views

I want to build a battery based DC supply for LED mirror that has AC power cable (230VAC)

I recently purchased an LED mirror that is AC powered (230VAC). The problem is there is no GPO (power outlet) in the room. I am trying to make this wireless and wall mounted. I tried researching DC ...
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1answer
130 views

How to calculate output power of a multi-MPPT inverter?

I would like to know how to calculate the output power of a multi-MPPT solar inverter. As an example, I have chosen the Fronius Primo 8.2-1 inverter. This inverter has 2 MPP trackers. For what I ...
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Why does my input current inverter is high?

I have a problem with input current in my inverter is high. My inverter will use for solar panel and using boost converter to convert dc voltage 12-18 Volt to 24 volt. I'm using P channel mosfet ...
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1answer
33 views

How to control RMS output of an DC-AC inverter?

Is it possible to design an inverter, with 270V DC input and RMS output of 115V. I don’t want to use a chopper or a transformer. Is it possible to meet this requirement by using PWM only? Or chopper/...
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Equivalent impedance seen at input terminals of inverter stage

I am using a three phase interleaved DC-DC boost converter which is followed by the three phase inverter. I need to model the impedance seen by the DC-DC converter when inverter load is connected to ...
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1answer
48 views

Can battery inverters output reactive power?

This inverter manufacturer's Paper Bad Power Factor? – A reason to oversize your inverter mentions that "inverters can generate reactive power without using any active power." Can battery inverters ...
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2answers
62 views

How can I design the BJT based inverter question given in description?

QUES: Design a BJT based inverter operated from a 1.5 V supply.With the input connected to the 1.5 V supply through a resistance equal to RC, the total power dissipation should be 1 mW and forced β ...
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30 views

Powering a max 360 W Ender 3 Pro with a 300 W inverter

I’m planning on powering the Ender 3 with a 200 W solar panel with a 300 W inverter. I saw on some posts that the Ender 3 draws 500-ish watts whilst starting up but then drops to an average of 150 - ...
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1answer
52 views

Why are inverter modules extremely oversized in VFDs?

I was checking a faulty Schneider VFD (ATV312H037N4) which is rated for a nominal output current of 1.5 A. Turns out the rectifier bridge of the inverter module (FP10R12YT3) blew up and after reading ...
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47 views

Inverter EMI filter design

I'm designing an inverter with a switching frequency range of 10-40kHz. The inverter will run off of a DC power supply at a relatively low voltage (30-80VDC) and low power (~100W) for motor control ...
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5answers
70 views

120v Inverter and GFCI

I have a 48vdc to 120vac inverter with a 3 wire output (hot, neutral and ground). I installed a GFCI outlet using those output wires. I tried putting a resistor (I tested with 1k 100 and 22 ohm values)...
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69 views

Can I run a 2000W power tool off of a 2000 (4000W peak) modified wave inverter? [closed]

Would a 2000W power tool (electrical chainsaw) be able to run off of a 2000W (4000W peak power) modified wave inverter connected to a 12V-40AH AGM battery? Would the motor need more than 2x the ...
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19 views

How to handle duty cycle below deadtime in 2- and 3-level inverters

When programming a pwm for a 2-lvl inverter what would be the suggested strategy for a duty cycle close to 0% or 100%, meaning when I cannot guarantee for dead time. What would cause less distortion ...
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1answer
34 views

I'm trying to build an inverter circuit in LTspice using voltage controlled switches

I'm trying to build a H-bridge inverter circuit on LTspice, but I'm having trouble with getting a correct waveform. The upper and lower switches do not appear to be in sync (i'm not getting a complete ...
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44 views

SMPS chopper stage

Please what will the output waveform of a PWM signal look like after being switch by a MOSFET or transistor - especially in SMPS. Will the frequency or duty-cycle of the pulse increase or decrease or ...
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1answer
44 views

how to switch on a inverter when my fridge thermostat switches on

Good day, I have a 220v 65W fridge that i use for camping and a 12v/220v 1000W inverter. I need a circuit diagram that will switch on my 12v/220v inverter when my 220v fridge thermostat switches on. ...
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29 views

Terminology of AC -DC converters

I would like to ask about the difference between the terms "AC-DC Converter", "DC-AC Converter" and "Inverter". If I am getting it right, the "AC-DC converter" converters AC voltage to DC. The "DC-...
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3answers
85 views

Questions about the voltages of a lithium jump starter I purchased [closed]

I purchased an Audew jump starter based on several favorable reviews on youtube. According to the specs, the jump start output is 14.8V, but when I check the voltage with my multimeter it measures 16....
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36 views

SiC inverter design w/ STM32 - high switching frequency

I am designing a SiC inverter using a 72MHz STM32F302CC with the STM32 motor control library. The desired switching frequency is 50-100kHz, depending on the device we select. Reading the motor ...
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1answer
44 views

How to approach this question?

I found this question is a very interesting one but I don't know how to approach it since I never dealt with inverters. Can someone give me hints ? I found it very confusing that two switches has ...
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2answers
85 views

Working of a transistor in a TTL inverter circuit

I was referring to TTL inverter circuit in the book Digital fundamentals by Thomas Floyd and its working principles first proposition went as follows: When input is HIGH, Base emitter of Q1 is ...

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