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Questions tagged [full-bridge]

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0
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2answers
96 views

Incorrect operation of the Allegro A3941 driver

I use the Allegro A3941 driver in these modes: At very low duty cycle (<10%)PWM motor consumes 0.05 A and produces a squeak. If you increase the PWM duty cycle of the PWM to 10% the squeak ...
2
votes
3answers
186 views

Why is this camping light deadly?

I am learning, so go easy on me, if you can. In a video with BigClive, he takes apart a camping light and says it's deadly when you have mains plugged in and usb plugged in at the same time. In that ...
2
votes
1answer
109 views

How to select high frequency rectifier capacitor?

Can I use aluminium electrolytic capacitor after a full bridge rectifier? My operation frequency is 200 kHz with output voltage of 100 V. Based on this paper: "Analysis and Design of Load-...
1
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1answer
40 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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1answer
54 views

3 Phase calculations

I have 3-phase utility mains power supply whose phase voltage is 220 V, 50 Hz. I keep getting confused about various calculations of the 3-phase mains as follows: Formula for the line voltage. ...
0
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1answer
259 views

Smoothing cap vs filter for full wave bridge rectifier circuit

I am designing a circuit which requires high-voltage DC. My plan is to step-up my mains (120VAC) with a transformer and then pass that through a FWB. After the FWB, I want to smooth the signal into a ...
3
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2answers
298 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 ...
0
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1answer
74 views

How does flux change polarity in full bridge SMPS transformer?

Take a full bridge switching circuit connected to the primary of a transformer. Assume: No load on secondary. Voltage into full bridge is DC. Duty cycle of switching is 50%. At t = 0, full bridge ...
0
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2answers
172 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 ...
0
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2answers
65 views

Does using voltage regulator in power supply further reduces the rippling?

I want to build a 12 V DC power supply. Which one is a better approach? If I have a step down transformer 220/12 volt and after doing its full wave rectification and smoothing its wave using ...
-2
votes
1answer
191 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 ...
0
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1answer
403 views

RC snubber on bridge rectifier (capacitor rating)

I am using a bridge rectifier on the mains and across each diode I have placed a RC snubber for EMI mitigation. (C is rated at 1Kv) My question is...on the C (from the RC snubber) should I use Y or X ...
0
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0answers
31 views

How can I drive a bridge with three states and two high-side switches?

I want to drive a configuration similar to the one presented in Figure 1 of A novel tri-state boost converter with fast dynamics, but use a MOSFET instead of the diode for efficiency. I want to put ...
0
votes
1answer
117 views

AC to DC power supply using full wave rectifier with 4 outputs

I simulated the circuit below with multisim and got the required values. [![enter image description here][2]][2] 1.25 to 22V using the poistive regulator -1.25V TO -22V using the negative ...
0
votes
1answer
55 views

How can a constant secondary side current cause a primary current to flow in a transformer?

This is a question which was originally asked by my power electronics professor but left unanswered. Suppose you are given the following system (kindly borrowed from this question) Suppose that: ...
1
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1answer
92 views

What does PA1 do in this schematic?

Original document:http://www.st.com/content/ccc/resource/technical/document/data_brief/group0/95/79/2a/ed/d0/a0/4f/46/DM00263698/files/DM00263698.pdf/jcr:content/translations/en.DM00263698.pdf The ...
0
votes
1answer
70 views

How does a filtering capacitor smoth a changing current? [duplicate]

Lets assume,in picture blow, the current be in its peak voltage moment. then when the current begins to fall (assume a moment after the peak moment) we know the current is blocked by diodes (actually ...
4
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2answers
2k views

Smoothing a Full-Wave rectifier voltage

I was reading about full-wave rectifiers and came across the schematics below which the capacitor C can smooth its voltage, but I didn't understand one case: We know that when the rectifier's voltage ...
2
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3answers
5k views

Connecting Voltage Regulators 7812 in Parallel for High Current [duplicate]

Could I use two L7812 voltage regulator ICs in parallel to get 12 volt and more current that with just one?
0
votes
1answer
91 views

Mistake in reading a rms voltage

I got a really strange result. I've build a full-bridge rectifier with a capacitor filter. And I used the following values \$\text{C}=500\cdot10^{-6}\$ and as a load \$\text{R}=1000\$. The maximum ...
0
votes
1answer
102 views

Battery charger filter circuit

I'm working on a project where I have to make a powerfull battery charger. And someone I'm working with told me that it is a good idea to have mains voltage connected to a full bridge rectifier and ...
1
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0answers
83 views

Calculating dissipation of a CCR powered via a full bridge rectifier

I'm putting together a string of UV/purple LEDs for photoetching purposes. The idea is the following: simulate this circuit – Schematic created using CircuitLab The 80 LEDs are in series, ...
3
votes
2answers
261 views

Why do I get high DC current in grid tied inverter output?

Edit: Added gating signal waveforms. Changed some of the graphs, I accidentally put a test circuit waveforms the first time. Current is not that high but offset is there and current is high for a ...
0
votes
1answer
56 views

Current limiting resistors for preventing shorts at power supply turn-on [duplicate]

In a text it mentions about a power supply that the filter cap will act as a short at initial turn-on. Below I showed these points as A and B: In this case, the diode will have a surge current Is. ...
0
votes
1answer
11k views

Derivation of ripple factor equation for a full-wave rectifier with filter

I'm trying to derive the ripple factor for a full wave rectifier with a filter. This parameter is defined as the ratio of the root mean square (rms) value of the ripple voltage (Vr_rms) to the ...
0
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1answer
1k views

Load cell temperature compensation

Can someone explain to me how this (as advertised) full bridge load cell works? I'm aiming for good temperature stability and I understood a full bridge load cell configuration should reject error ...
0
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0answers
238 views

Full Bridge Inverter with transformer, source current waveform

I intend to make a 750W DC/AC inverter working with a 24V DC supply. I have simulated the circuit in MatLab using PLCECS toolbox. Here i use a 50kHz carrier to generate a 50Hz modulated unipolar PWM ...
0
votes
2answers
705 views

Full Wave Rectifier and 7805 Regulator

I have make a full wave rectifier and aimed to obtained +9V, -9V and +5V DC from an AC transformer (I have diplayed output of transformer only as AC1 and AC2) as i have shown below. However, when i ...
0
votes
2answers
253 views

Full Wave Rectifier Ripple Problem

I have made a full wave rectifier circuit to obtain 5VDC, 9VDC and -9VDC. To prevent the ripple, i have selected C1 and C2 as 4uF which were shown below. I will use a 12V, 6W transformer to get AC ...
0
votes
1answer
269 views

Negative charge pump problem

I have an 18V 1.5A mains transformer (outputs around 30V peak with no load at 50Hz) followed by a full-bridge rectifier and a filter capacitor: (there would be a schematic here if SE allowed me more ...
-1
votes
2answers
202 views

**VGS** of upper MOSFET disappears after turning on supply voltage [closed]

Why does VGS of upper MOSFET in either leg of full bridge drop when the supple voltage across the drain terminals of the upper MOSFETS gets turned on ? The half bridges separately work perfectly fine ...
-1
votes
1answer
471 views

Gate driver IR2110 doesn't work - Full bridge [closed]

I am using two gate drivers (IR2110), each driving a phase leg of the full bridge. Everything has been wired up according to the datasheet http://www.infineon.com/dgdl/ir2110.pdf?fileId=...
0
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1answer
654 views

IR2110 incorrect output waveform from input waveform

I have a problem that is bothering me for weeks, after frying a couple of MOSFETs and (expensive) IR2110 ICs, I still have no clue. Note that I am still a beginner when it comes to this. The project ...
-1
votes
0answers
754 views

High Side MOSFET failure in Full Bridge DC to DC Converter

In full bridge dc to dc converter , when i tried to turn the converter with 1 A load at the output with 48 volts input voltage , converter suddenly stopped working . After invistagation both high side ...
1
vote
3answers
352 views

what kind of three phase full wave rectifier should we use?

We have the following generator: Permanent Magnet Generators. For the project we would like to use this converter. Between this generator and converter we've to convert the three phase voltage to an ...
-3
votes
1answer
128 views

How to get a +15v&-15v DC from variable AC source using Full-wave rectifier? [closed]

How to get to DC voltages (+15v & -15v) by using Full-wave rectifier, and if I change the AC source, the output stay stable, i.e Independent on AC source... any help? ..... I want to change AC ...
0
votes
1answer
212 views

Common mode filter

I was wondering, after reading this question: Common mode filter, Where do you decide to put the filter, at the in- or at the output? Do you just look at the current and place it where the current is ...
0
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2answers
339 views

Why do we need galvanic isolation with low power components?

This is an analog to digital converter with I2C communication from a project (350W power supply) by ti instruments. it senses line and pfc voltage and communicates with the MCU. I don't understand ...
0
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1answer
221 views

Somethings about Infineon BTN8962

I want to design a BDC driving board with Infineon BTN8962.(Infineon BTN8962 is a half of H-bridge IC) As we all know,BDC driving circuit is just like this: In this picture,We set a High side MOS(QA)...
1
vote
2answers
5k views

LC Filter for a Full Wave Bridge Rectifier?

According to what I've read on a few websites and PDFs (http://www.irjes.com/Papers/vol2-issue6/Version-1/E02064249.pdf is an example) using an inductor-capacitor filter to assist AC to DC ...
7
votes
3answers
422 views

How to improve the full bridge / half bridge start up time?

I am trying to find out a way to improve the rise /start up time of a series LC circuit placed in a full bridge (or half bridge) circuit. Here is a simplified schematic. The circuit works very well, ...
1
vote
1answer
799 views

Voltage spikes with ZVS full bridge

I am designing a DC/DC converter. I chose the fullbridge topology. The requirements are as follows: Vin = 75 - 125 Vdc Vout = 200V P = 600W Fs = 100 Khz The basic schematic is as follows: I use ...
0
votes
1answer
2k views

Capacitor Sizing for A Full Wave Bridge Rectifier?

Building my understanding of the issue from (First PSU - need help with capacitor size) (especially the comments/ripple wiki/several capacitor sizing webpages) the calculation for rectifying a full ...
0
votes
1answer
917 views

Reactive power in single phase controlled full wave bridge rectifier

How to calculate the reactive power,Q (VAR) in single phase controlled full wave bridge rectifier with only R-load? The sample observations of the experiment are given in the image. But I am wondering ...
1
vote
1answer
269 views

IR2110 - measuring Vb to Vs kills MOSFET

I got a new digital oscilloscope as a gift. As a training course, I observed some waveforms of my test 12V full bridge circuit that is driven by TL494 and two IR2110 operate the IRF3710 100V mosfets. ...
2
votes
1answer
316 views

Why would someone prefer halfwave rectifier over bridge rectifier? [duplicate]

The other day, out of curiosity I was measuring the current wave shape of a laptop charger. The wave shape indicated a spike only in one half cycle. I'm guessing half wave rectifier here. One thing ...
0
votes
1answer
257 views

Powering an LED with a 170VDC Full Bridge Rectifier

I am currently in the process of designing a Tesla Coil and am stuck at the Full Bridge Rectifier and have some reservations about what I propose to do. Currently, the circuit looks like this: I ...
0
votes
1answer
2k views

LTSpice Full Wave Controlled Rectifier Erronous SCR Breakover

I'm attempting to simulate a full wave SCR rectifier: However it is not behaving correctly. In my setup V3 controls one pair of SCRs, and V4 controls the other. All the math on the side is just for ...
5
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4answers
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 ...
8
votes
4answers
2k views

Why does current flow from the most positive to the most negative in three phase system?

I put the following circuit in a simulator to see how it works. I understood it but I have a question: At the time of the vertical green line, The simulator shows me that the current flows from the ...