Questions tagged [full-bridge]
The full-bridge tag has no usage guidance.
103
questions
0
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16 views
UCC28951 Without output mosfets
I plan to do a Full-Bridge phase shift converter with ZVS. Output 340V @ 2A.
I would like to use the UCC28951 controller but the ...
0
votes
1answer
56 views
Lazy full-bridge PWM control
I'm playing with a full-bridge driver:
Usually, you want to put an inverted PWM signal on IN1 and IN2 and take care of dead-time.
While writing the code for MCU I tried a simpler pattern:
put a PWM ...
0
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0answers
25 views
Control two DC brushed motors with two wires in common
I'm working on a retrofitting project. I need to control 3 DC brushed motors with full H-bridge drivers. In most scenarios the 3 motors have independent connections:
simulate this circuit – ...
0
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1answer
48 views
Full-Bridge Mosfet Vds Waveform Problem
I'm trying to build a full-bridge dc-dc converter, PWM signals are ok but drain-source waveform has some problems. Here is drain-source waveform with a proper pwm signal on gate.
Then I decided to ...
0
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3answers
35 views
Flowing back of current from capacitor filter to full bridge rectifier
Context:
Pg-485 of this pdf
Now we shall discuss the role of
capacitor in filtering. When the voltage
across the capacitor is rising, it gets
charged. If there is no external load, it remains charged ...
0
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1answer
49 views
Is there any way to reduce the miller effect on a mosfet bridge?
I got miller effect on a full bridge and I'm trying to get rid of it. Is there any way to reduce the miller effect on a mosfet bridge?
I'm using opto drivers with bootstrap circuitry to drive.
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0answers
54 views
Full bridge inverter using IR2110 giving output in patches
I have made a full-bridge inverter using IR2110 IC. The MOSFETs used are IRF540n. The bootstrap capacitor is 4.7uf. The diodes used are 1N5819 high-frequency Schottky diodes. The operating frequency ...
1
vote
2answers
65 views
Full-bridge output doesn`t work as expected
I am making a half-bridge amplifier and successfully managed to amplify a sinusoidal wave (simulates a sound signal). When amplified it has almost 100V of amplitude. It has a inductor and a capacitor ...
0
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2answers
130 views
What type of 24 VDC to 730 V converter is this?
The circuit below converts 24V DC into 730V. The circuit looks like a flyback converter but from what I know with the full-bridge rectifier at the output it can't behave like a flyback.
The feedback ...
3
votes
1answer
94 views
Can an H-bridge drive another bridge?
I'm using a low-frequency RFID IC that handles a bunch of the low-level signal decoding, but I'm hoping to get more range out of it. It has two TX pins (diagram below) that it describes as a "...
-2
votes
1answer
82 views
For a full wave bridge rectifier, why does the oscilloscope does not show the rectified voltage in negative cycle?
I was trying to do a simple full bridge rectification. There is a strange problem. The oscilloscope does not show the rectified waveform in the negative cycle. The input is applied from a Keysight ...
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0answers
27 views
Isolated Type 3 Compensator
I'm trying to build a full bridge dc-dc converter and planning to apply a type 3 compensator(voltage mode). When I check the isolated feedback type 3, I've read some comments indicate that it's hard ...
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0answers
33 views
S domain transfer functions of full bridge inverter
I need to design an inverter circuit as in the schema. It is driven by the unipolar PWM method. I have a problem with the circuit. It would be great if anyone can help me.
I want to get the s domain ...
0
votes
1answer
37 views
What is the best number of PWM signals for Full-Bridge driving? (2 vs 4)
Full-Bridge resonant converter circuit:
Each transistor (Mosfet) has its own driver (ISO5852S).
I assumed that a full bridge could be controlled with two PWMs.
...
0
votes
1answer
35 views
Best positioning of snubber capacitors for Full-Bridge transistors
Two options for the location of snubber (film) capacitors.
In the first circuit, both capacitors stand up to before the bridge. In the second variant, each capacitor stands next to the half-bridge.
I ...
1
vote
1answer
65 views
Oscillation in Class D amp design
I am building a class d amp circuit with base design from Great Scott's Class D amp which is found here.
I am trying to build and simulate the circuit in LTSpice with difference being I won't be using ...
0
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0answers
43 views
Single-phase thyristor full bridge rectifier vs three-phase thyristor full bridge rectifier
For Single-phase thyristor full bridge rectifier compared to a three-phase thyristor full bridge rectifier, with regards the input current harmonics, does the three- phase rectifier have an advantage ...
2
votes
0answers
160 views
1.7 MHz Full bridge driver circuit for mist maker validation
I'm building an ultrasonic mist maker that can support 10 ceramic discs with a resonant frequency of 1.7MHz. I found the following circuit online, unfortunately, I'm a beginner in circuit design and ...
1
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0answers
50 views
Advantages and disadvantages of using igbt module with integrated rectifier bridge
What would be the main problems of using an igbt module with a rectifier bridge in an ac-ac converter project?
Noise? Temperature?
Does separating the rectifier bridge from the full bridge really ...
0
votes
1answer
64 views
How to determine if a load cell is quarter-bridge, half-bridge or full-bridge?
Im looking to purchase 4 disk type load cells for weighing applications but it doesn't mention what configuration it is in (quarter bridge, half bridge etc.) Is it safe to assume 2 wire load cells = ...
0
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0answers
82 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&...
0
votes
0answers
23 views
Xl4061 board problem
I am building an amp for 6th order subs which is based on two transformers which have around 25 VAC, and I am trying to rectify them for 2 subwoofer module filter boards (12-32vdc) and for two TDA7498....
0
votes
1answer
118 views
H Bridge vs Half Bridge current sense
Are there any disadvantages in measuring H Bridge current only via 1 shunt resistor?
Since it will be made by hand on a perf board the only disadvantage will be the possible longer wires that connect ...
2
votes
0answers
56 views
How to drive MOSFET switches in a cascaded hybrid modular multilevel converter using a half-bridge driver “IR2103S”
I am trying to drive the MOSFET switches in a cascaded hybrid modular multi-level converter as shown in Fig. 1. Fig. 2 is used here to simplify the circuit and to present the problem (let's focus on ...
0
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0answers
78 views
Pitfalls of using only two diodes in a “full wave rectifier”?
Scenario:
I have a small signal from a Piezo element which I am amplifying using a fully differential amplifier. Thus, my gained output from this In-amp are "two" (sine) waves inverse of ...
1
vote
0answers
2k views
How do you find the peak-to-peak ripple voltage of a full wave bridge rectifier?
The 32VRMS secondary of a transformer feeds a full wave rectifier and capacitor filter as shown in
the circuit
The peak-to-peak ripple of the output voltage of this circuit needs to be less than 1V ...
0
votes
1answer
100 views
Calculation of switching transformer at 100kHz
I am not able to desgin transformer for switching frequency 100kHz. It´s easy to desgin usual transformer for 50 Hz. But I´m totaly out when comes to switching transformers. What material should I use?...
0
votes
1answer
127 views
what does this bulb need to work properly in this circuit?
This is the circuit, before it was working, but not anymore. I have an identical circuit and its ulb still working. I don't know where is the problem.
(https://i.stack.imgur.com/fPpZW.jpg)
0
votes
2answers
69 views
Output Voltage Ripple Considerations
I'm working on a full bridge dc-dc converter, following the instructions on power supply cookbook.
It has a 350V output and 2kW total power, 30kHz switching frequency
I choose inductor current ripple ...
1
vote
1answer
34 views
What's the purpose of components in these mosfet driver
I see these double ended transformer drivers on many places, I know the working principles of these gate drive transformers but still don't have an idea about external components that I've marked with ...
0
votes
3answers
106 views
How to run a DC device through 3 phace 400V AC mains?
So I need to put a wifi antenna on farmland, the issue is that the antenna needs 12V DC powered over Ethernet and the only power source nearby is a 3phase 400V AC one...
So is there something like a ...
0
votes
1answer
65 views
Why does the output voltage after full bridge drop so many?
recently I am researching the piezoelectric transducer (PET), which can convert the mechanical energy into electricity. And I found a strange phenomenon. I used the 10MΩ probe of oscilloscope to ...
0
votes
2answers
90 views
How do I calculate the average voltage of this wave?
I need to calculate the average voltage of the wave below, the DC voltage is 120 V , the curve starts at 21.65 degrees and the peak voltage is 325.269 V. The solution is 221.3 V. This is from a ...
0
votes
1answer
410 views
How to design this filter?
I've a full bridge dc-dc converter and I'm trying to understand it. It has 48V input and 400V output with 1600W rating, 30kHz switching frequency.
At the input of this SMPS there's a filter ...
3
votes
1answer
139 views
How can I get rid of this distortion?
I'm trying to build a 16kHz single phase, full bridge PWM inverter, Vdc=380V, 2kVA rated.
When I load the inverter a little bit, the output voltage waveform is looks like this:
simulate this circuit ...
1
vote
0answers
168 views
Type 3 Compensation on Full Bridge DC-DC Converter with SG3525
I'm trying to build a 48V-400V full bridge dc-dc converter. I'm using sg3525 as pwm IC and trying to get isolated feedback from output and planing to do it with TL431.
When I study on it people are ...
0
votes
2answers
313 views
LTspice transformer voltage course problems at low duty cycle
I am trying to simulate full bridge SMPS in LTspice where I can change the input voltage to the voltage regulator (LT317) by changing the pulse width of the PWM signal at the MOSFETs.
Everything ...
0
votes
1answer
178 views
Forward Voltage VF Max 1V does this mean that the full wave w10 bridge rectifier can only allow 1 volts via it
I want to use a full-wave bridge rectifier. My circuit needs 2 amps of current and operates at 12volts (12V @ 2A). I found this https://www.tanotis.com/products/vishay-2w01g-e4-51-bridge-rectifier-...
0
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0answers
52 views
How do I calculate deformant and real power of this circuit?
I have this circuit, the load is RL:
I need to calculate the apparent, real, reactive and deformant power assuming L is very large. Since L is very large that means Q= 0 var and Pload=~Uav*Iav and S=...
2
votes
2answers
2k views
Dead-time in Full Bridge Inverter (LTSpice Simulation)
I am trying to generate a dead time between two switching legs in the conventional full bridge inverter. However, by simply including the delay block for one pair of switches - just shifts the signal ...
1
vote
2answers
112 views
In a half-wave uncontrolled rectifier with RL load why does the voltage spike when current reaches 0A?
I understand that the inductor creates a negative voltage to oppose the change in current but I don't understand why the voltage spikes up instantly when the current reaches 0A.
1
vote
2answers
444 views
Capacitor in parallel with relay coil backfires on contacts
I've got a smoothing capacitor(2,2uF) C1 in parallel with relay coils inside a fullwave diode bridge.
When the circuit is closed through contacts in pre-relay RLY1 it first gives me, almost everytime ...
0
votes
0answers
67 views
How to validate an SMPS transformer?
From UCC28950 webench design data I have approached a vendor for making a transformer for Phase shifted Full Bridge DC -DC converter. Now before giving order to vendor, I want to gather data on how to ...
0
votes
1answer
105 views
Average Voltage of a 3phase full wave bridge diode rectifier derivation
Why three phase bridge rectified waveform is integrated over the half period \$\pi/6\$\ to find the average voltage? Should it not be integrated over \$\pi/3\$\, as the wave form repeat itself after \$...
0
votes
1answer
226 views
Transfer function of full bridge inverter using mosfet and LLC circuit
I'm new at deriving transfer function and trying to derive the same for following circuit. It contains full bridge inverter circuit with input as 50 Vdc (50% duty cycle used to drive MOSFETs). Output ...
0
votes
1answer
450 views
Schottky diodes as full bridge rectifier
I need to make a 75-100VDC high current power supply. I do not have any high current diodes or bridge rectifier ICs but I do have a load of scrap switching power supplies.
Could I take 4 of the (lack ...
1
vote
1answer
136 views
Arduino died when grounds got disconnected
Alright bear with me since English is not my first language and it's my first time posting here.
So I was using my Arduino Nano (not genuine) to drive a single phase full bridge rectifier. The ...
0
votes
0answers
110 views
spike in the Full bridge SMPS
I have a full bridge SMPS and I am measuring the voltage across the output´s diodes on the secondary side.
As you can see the voltage spike changes by changing the output current, for example at zero ...
1
vote
3answers
491 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
230 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 ...
