97 Threads found on edaboard.com: Half Bridge Power
I am working on a project related to smps but now i am confused regarding the design of the half bridge converter which i am using after the pfc circuit(which is a dc dc converter called zeta).I have referred many designs and found that while designing the primary turns nominal voltage is considered in the design equation. Since i am using a p
Power Electronics :: 03-05-2017 17:06 :: Primrose :: Replies: 0 :: Views: 270
I am building a small AM TX attached.
I would like to replace the diodes with tube rectifiers (semiconductor-free), whereas I need to keep the power transformer simple (no center tap).
There as three options without a center tap, I am aware of:
1. A half wave rectifier (too much ripple)
2. A full wave bridge rectifier (it must use 4 (...)
Tubes and Retro :: 02-15-2017 12:58 :: neazoi :: Replies: 5 :: Views: 611
Hi folks , i'm having a weird problem , now my smps worked and all was ok until i needed a small repair and accidentally by mistake blew my switching IGBT'S , now I replaced them with new ones of a different kind but before turning them on I checked whether all is ok with my gate drive IC's , I replaced the IC (IR2110) and checked the supply voltag
Power Electronics :: 02-04-2017 21:14 :: Salvador12 :: Replies: 10 :: Views: 433
I'm trying to write down some requirement for power supplies between 1 to 2 kW range. I do not know how much is the reasonable efficiency numbers that people achieve these days for PFC , LLC resonant and phase shifted full bridge DC-DC converters between 1 to 2 kW range at full load? Is 94% for 1.2kW PFC and 95% for 1.2kW half (...)
Power Electronics :: 09-16-2016 02:04 :: skn96 :: Replies: 6 :: Views: 440
The left side is a half-bridge, one transistor is On while the other is Off. The capacitors charge to 1/2 supply voltage each. The node between them is 1/2 supply voltage. Operation might be described as single-ended class B.
True AC (at 1/2 supply voltage) goes through the transformer primary. This allows a reduced step-down ratio.
Power Electronics :: 07-01-2016 03:21 :: BradtheRad :: Replies: 7 :: Views: 480
I am designing a half-bridge Thyristorized Inverter. The Inverter has to deliver approximately 30 Watts into a R and a R-L load. The circuit is to be designed for laboratory demonstration purposes.
Any suggestions on what commutation technique to be used for this application?
I have ruled out Class A and Class B commutation b
Power Electronics :: 06-14-2016 15:58 :: pradhan.rachit :: Replies: 2 :: Views: 374
We are designing a 20W SMPS which simply supplies 15V at 1A to an RF Phased array antenna circuit. (its for comms). Vin = 48V.
We were wondering if it is overly extravagant to do this as an half-bridge LLC converter? Its just that the SMPS will be very close to the Comms signal processors and other sensitive circuitry, so we wondered sh
Power Electronics :: 04-19-2016 18:30 :: treez :: Replies: 0 :: Views: 260
The small pulse width stuff is complete nonsense. A power piezo transducer like the device in the link will driven by 40 kHz sine wave, obtained by a matching LC network from a switching stage producing a square wave, e.g. a half bridge circuit. Variable pulse width could be used under circumstances to adjust the power level.
Power Electronics :: 04-09-2016 10:58 :: FvM :: Replies: 12 :: Views: 729
Hello friends,I am making a half bridge power converter with two Ultra fast IGBTs and a "IR2153" halfbridge gate driver IC,the switching frequency is 6KHZ and the current frequncy coming from AC line is about EMI filter is needed at the input of the circuit,there are many types of ready to use EMI filters (...)
Power Electronics :: 03-05-2016 10:09 :: saeedmns68 :: Replies: 0 :: Views: 286
A decent rule of thumb will get you close:
C = I x dT/dV
C (in uF) = Amps x microseconds (between mains half cycles) divided by desired peak to peak ripple.
Lets see, assume 1,200 watts at 340v dc (= 3.5A) and 34v p/p ripple.
Assume 100 Hz from rectifier = 10,000uS hold up time between cycles
This is for both C4 and C7 as they are in series acros
Power Electronics :: 12-23-2015 09:10 :: Warpspeed :: Replies: 3 :: Views: 485
I have to design a 10W power supply to convert the 220V mains supply voltage to drive a piezoelectric actuator using half bridge topology.
310V DC link voltage will be switched at 72kHz and resulting square/trapezoidal wave will be applied to piezoelectric actuator at resonance.
I should be able to control the dead-time upto 10us (...)
Power Electronics :: 12-14-2015 09:25 :: jabbar81 :: Replies: 1 :: Views: 333
PC power supplies with 5,12V are used for this reason.
Then you can decide if you want open drain control with motor coasting or a full bridge with fast start stop or PWM speed control, then stop change direction using logic level full bridges to switch 12V instead of half bridge.
Choose RdsOn much less (...)
Analog Circuit Design :: 10-26-2015 05:31 :: SunnySkyguy :: Replies: 41 :: Views: 3681
This thread discusses a similar topic. Start with a single 24V supply, obtain +12 -12V split supply with virtual ground.
It has a possible solution: two stacked capacitors similar to your C1-C2. Each one is charged alternately by a half-bridge.
If you wish, add a single inductor in the center, to create a dual-purpose buck converter.
Analog Circuit Design :: 10-13-2015 02:57 :: BradtheRad :: Replies: 10 :: Views: 870
I am making a Piezoelectric actuator driving circuit using half bridge. I have to make it work at 220Vrms, 60Hz line voltage. Currently I am testing it at 100Vrms, 60Hz voltage. The line voltage is rectified and converted to DC link Voltage. IR2153S is used as driving chip to drive piezoelectric actuator at 74kHz, using square output wave.
Power Electronics :: 07-07-2015 08:52 :: jabbar81 :: Replies: 1 :: Views: 453
Ha, what is the resonant freq of your load with your 10uF caps (20uF effective)? if you strike the early part of a resonant half cycle then the circulating current can be in the order of a few amps but the power supply will be supplying only the losses in the ckt, i.e. fet res losses and I^2R losses elsewhere..... this looks to be what is hap
Power Electronics :: 04-11-2015 05:10 :: Orson Cart :: Replies: 30 :: Views: 2178
The function depends of course on the implemented modulation, but a half-bridge inverter can be operated as "active front end" (AFE), a bidirectional AC/DC converter with high power factor.
You surely have noticed that the capacitors are already charged to input voltage peak-to-peak of about 620 V if the IGitBTs are permanently off, by (...)
Power Electronics :: 03-13-2015 14:34 :: FvM :: Replies: 5 :: Views: 828
As a good measure, you could define a half sine wave with a power-of-two points of resolution, for example 32 divisions per half bridge yields a good shape. It means that you should generate a table for pickup values to load duty-cycle register containing on that case: 32/2 points ( 1/4 sine wave ). Therefore, the required (...)
Microcontrollers :: 02-16-2015 21:17 :: andre_teprom :: Replies: 22 :: Views: 2381
Our customer has requested a PSU to give +/-40V at 320W (for a half bridge class D amplifier supply). Why has he not just requested an 80V rail at 320W and then he could have used a full bridge class D amplifier?
Is the reason because +/-40V at 320W gives the same 80V difference but is within SELV voltage regulations?
Power Electronics :: 01-04-2015 13:03 :: treez :: Replies: 9 :: Views: 741
hello dear Forum,
I have designed a 1 KW ultrasonic generator with an half bridge for 28 KHz frequency
however I am facing a problem with false turning ON of IRFP460 mosfets
the H mosfet is driven ON (unwanted peak) when the L mosfet is driven ON (wanted) by IR2113
and vice versa
I have scetched the circuit and mosfet gate signals
Power Electronics :: 10-30-2014 20:53 :: anotherbrick :: Replies: 14 :: Views: 1930
I have already design a smps with L6699 (half-bridge LLC) . I connect directly the gate of two mosfet to the HVG & LVG pin of L6699. The output power is about 400watt . Now I want to design new smps with the output power at about 2000 watts. I want to design one high side driver for high side mosfet. I dont know how can (...)
Analog Circuit Design :: 09-13-2014 09:01 :: tictac :: Replies: 0 :: Views: 691
I attached an LTspice schematic, a very simplified version of a MOSFET half-bridge driven by a push-pull isolated signal transformer. The FETs are cross-conducting, but their gate pulses are not overlapped. If I am getting things wrong, can someone please show me the error, why are they cross-conducting?
Even if the load and the output
Power Electronics :: 07-14-2014 17:39 :: bubulescu :: Replies: 11 :: Views: 1431
It would be wasteful to use half the available power so I would guess it uses a bridge driver to allow 'almost' all the battery voltage to be used in one direction or the other.
By 'almost' I mean there will be a small drop in the driver circuit but nowhere near as much as half the battery voltage.
Hobby Circuits and Small Projects Problems :: 06-18-2014 08:01 :: betwixt :: Replies: 1 :: Views: 426
Dear Edaboard engineers, I need help here! There is this Sine Wave Inverter circuit I am working on. I did not originate the circuit but instead with my own EDA software I redrawn it in a new way and better layout for easy understanding and I also corrected some mistakes in the the original circuit but still, I couldn't get it to work!
I get high
Power Electronics :: 06-03-2014 20:48 :: mcmsat13 :: Replies: 3 :: Views: 1182
I am making an ultrasonic generator using half bridge used an IRs2110 two IRF840 an pic microcontroller 16f616, MY controller works fine without power circuit but when i complete my circuit then circuit works and after 3 sec microcontroller stops working.
I have tried an isolated supply to microcontroller of 5 volt.
IRs2110 have 12 volt (...)
Power Electronics :: 06-01-2014 20:25 :: deepeshmishra :: Replies: 4 :: Views: 840
Push-pull action is typical of the transistor power supply does not always have to be bipolar +/-.
The transistors/ mosfets do not necessarily have to be N-devices.
The output stage might have a capacitor in series, or it might be a network of components.
Power Electronics :: 05-01-2014 03:27 :: BradtheRad :: Replies: 1 :: Views: 1406
Please help me to choice a chip driver mosfet eg TC4427 . IR2110.. or other..../. for suitable (power) with my circuit mini SSTC half-bridge (tesla coil) 100 watt at 100 volts Thank you so much.
Elementary Electronic Questions :: 03-08-2014 23:43 :: minhlam :: Replies: 1 :: Views: 878
I'm designing DC/DC converter for low power application of up to 50 Watt using MOSFET half bridge configuration.
MOSFET will be supplied with 325V (dc) which I've to convert into 1.5v(min)-50 volts(max)
at isolation step down transformer's secondary.
Please suggest me gate driver ICs for 800V. plus any IC with inbulit isolation?
Can you sug
Power Electronics :: 01-13-2014 20:37 :: goldsmith :: Replies: 2 :: Views: 754
In the below .pdf half bridge schematic, R15 & C3 form a filter to filter out the ringing created by the leakage inductance of the half bridge transformer.
Is this the right way to filter out this ringing?
Here is the V(SENSE) waveform, and the primary current of the half bridge (...)
Power Electronics :: 12-31-2013 15:12 :: treez :: Replies: 3 :: Views: 722
use ic tl494 based half bridge smps
Power Electronics :: 08-26-2013 13:42 :: pradeep.g.belchada :: Replies: 4 :: Views: 690
I have a question about power dissipation calculation.
I designed some half bridge driver and simulated that. the current peaks to about 10A only during switching period.
I calculated this current through rms and average value and found that there are huge difference b/w that.
Of course (...)
Analog Circuit Design :: 07-26-2013 06:56 :: ljy4468 :: Replies: 6 :: Views: 771
It changes according to your desired output power. half-bridge can be used up to 1.5kW, in the case of more power, you need to select full-bridge. Push-pull can be used in any power as ı know but it has disadvantages as well. Although there are some disadvantages, your output (...)
Power Electronics :: 07-22-2013 21:29 :: fethiyeli :: Replies: 6 :: Views: 770
It should be mentioned, that the NPN/PNP circuit is good as a simple simulation setup, but not suitable for a real inverter design. Also driving BJT through a base resistor isn't a good idea because it involves huge power dissipation.
One capacitor? But we need Vs/2 across capacitor. So one capacitor can't do this job.
Analog Circuit Design :: 06-23-2013 21:20 :: FvM :: Replies: 12 :: Views: 3049
To get 75 V AC square waves from 150 V DC, you only need a capacitor to block the resistor is needed at the output, so that the capacitor can charge and discharge.
Since your half-bridge already consists of the PIC and mosfets, you can disregard that part of my schematic.
Hobby Circuits and Small Projects Problems :: 05-09-2013 12:20 :: BradtheRad :: Replies: 7 :: Views: 2126
you can get bus pumping on the half bridge for low freq AC supplied to your load, not for the full bridge.
Power Electronics :: 03-06-2013 06:15 :: Orson Cart :: Replies: 3 :: Views: 5013
With a H bridge you can push and pull current through the enegising coil. With DC you can only push current through it so you will get half the power.
Hobby Circuits and Small Projects Problems :: 12-20-2012 17:40 :: chuckey :: Replies: 5 :: Views: 1742
Is this pumping the result of large transient current flow through power supply resistance? Isn't that same for full or half bridge?
The power supply voltage buses of half-bridge circuits can be ?pumped? beyond their nominal values by large inductor currents from the
Analog Circuit Design :: 09-18-2012 16:47 :: jszair :: Replies: 1 :: Views: 1820
Have you studied the half-bridge topology? Where exactly are you stuck? Have you studied the various sections - oscillator, PWM, driver, MOSFET bridge, transformer, output rectification, feedback, etc?
Analog Circuit Design :: 09-03-2012 15:39 :: Tahmid :: Replies: 81 :: Views: 62405
2.5Kw is pretty high for single-ended converters like forward and flyback (even quasiresonant flyback), so I would look more at half or full bridge converters. Maybe a two switch forward converter. At high power levels you want to try to reduce voltage stresses on the switches, so that you can use lower voltage rated devices.
Power Electronics :: 08-04-2012 14:01 :: mtwieg :: Replies: 16 :: Views: 2323
power MOSFET drivers or bridge drivers may do this but
generally they are not so fast. At the 40V node, BJTs
are good for less than 1GHz fT pretty much, and that's
if you're really careful about preventing saturation. 40V
MOS is even slower.
Anyway, I think I'd look at high side FET drivers or using
a section of a (...)
Elementary Electronic Questions :: 07-13-2012 15:18 :: dick_freebird :: Replies: 3 :: Views: 769
A good THD ratio for a class D amp will be lower than 0.1 percent . which topology you are referring to ? half bridge ? full bridge ? differential three level SPWM ? ..... ? because it seems pretty unusual . how much is the frequency of triangular wave ?
Elementary Electronic Questions :: 06-20-2012 17:20 :: goldsmith :: Replies: 3 :: Views: 909
Believe it or not....
Ceramic SLA batteries have a temperature dependant charge limit time curve with temperature dependant cut-off voltage otherwise the MTBF of the battery suffers quicker. If you are not fussy use a 750W hair dryer on 1500 watt on half power @120Vac with a full wave 20A 300V Schottky $5 bridge so it is cool between (...)
Analog Circuit Design :: 06-17-2012 18:16 :: SunnySkyguy :: Replies: 9 :: Views: 13911
For bridge rectifier+ filter cap DC supplies you should assume a VA/W "form factor" of 1.6 respectively 2.0 for half-wave rectifiers. Losses of linear voltage regulators add.
Elementary Electronic Questions :: 05-21-2012 06:34 :: FvM :: Replies: 6 :: Views: 2002
I am trying to develop a digital feedback control for a 45-W half-bridge converter, microcontroller used is from microchip dspic33fj16gs502. PWMs provided to the mosfets are around 3Mhz and the power to microcontroller is self-supplied through auxiliary output of transformer. Currently i only have feedback signals of auxiliary (...)
PC Programming and Interfacing :: 05-16-2012 15:54 :: waqar86 :: Replies: 1 :: Views: 589
What is "diagonal half bridge " ? i'm not familiar with that and what is the difference between that and a usual half bridge ? ( with simultaneous supply or with single supply and two capacitor ) ?
Is it possible that you tell me about it , please ?
Power Electronics :: 03-24-2012 07:21 :: goldsmith :: Replies: 41 :: Views: 4048
In general, it is a method of supplying power to a high-side NMOS driver of a switching half-bridge.
For a half bridge output to be driven high, the gate of the high-side NMOS must be driven above the supply of the half-bridge.
Some form of self-driven charge-pump (...)
Analog Circuit Design :: 01-18-2012 01:41 :: checkmate :: Replies: 11 :: Views: 12879
The IR2110 is a bootstrapped half bridge driver and its lower frequency operation
is going to be limited by the size of the fly cap and the bleed current of the high
side driver circuitry. Now the 2110 is not a spectacularly high voltage device if
I recall. But it is pretty well known. I believe it is meant for the older 10V-ish
power FETs (...)
Power Electronics :: 01-05-2012 22:33 :: dick_freebird :: Replies: 4 :: Views: 1973
Since it's half-bridge, for short-circuit protection, you should use a current transformer in the path of the power transformer.
For overvoltage protection, step down the DC bus using a voltage divider, eg, by a factor of 100. So, 300VDC gives 3V at the output of the voltage divider. Say, you realize that overvoltage is defined for voltages (...)
Power Electronics :: 01-03-2012 17:02 :: Tahmid :: Replies: 7 :: Views: 5407
Complicated methods may provide this but it will be convenient to adopt a design as shown.
If at all you need to simplify it at the cost of its utility and versatility, you can replace the bridge using half wave rectification. You can drop the two 1N4004 diodes. You can drop the LED's and their series resistors. Then it would look pretty simple.
Elementary Electronic Questions :: 11-10-2011 19:33 :: ark5230 :: Replies: 4 :: Views: 6228
Markings of this kind are usually assuming knowledge of a device principle circuit. They are not primarly intended to support guessing about unknown components.
Nevertheless "AK" is almost self explanatory in my opinion. It can e.g. refer to the center tap of a half bridge, in other words a terminal, that's connected to both, anode and cathode.
Power Electronics :: 10-14-2011 21:07 :: FvM :: Replies: 13 :: Views: 1291
Which topology is suitable for this project?
I want to start with half-bridge and multiplier, anyone give advise?
Power Electronics :: 09-24-2011 12:24 :: WalkingBeijing :: Replies: 2 :: Views: 1289