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Questions tagged [half-bridge]

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Simulation problem in half bridge leg of an inverter

I am simulating Half Bridge Leg on an inverter. From the simulation, I could not understand why I was not getting proper dead time between high and low side fets. However, I set a delay time of 150ns ...
krunal patel's user avatar
-2 votes
3 answers
324 views

Why does a half-bridge amplifier output half the voltage?

From a hobbyist's perspective, I can't/don't understand why the amp output voltage is only half of the supplied voltage. I am wondering if there is a trick to overcome this. This circuit schematic ...
Tintin's user avatar
  • 75
2 votes
2 answers
140 views

Half-bridge on-time positive current slope details

As shown in the LTspice simulation, I am trying to build a simple HB converter. When the HS is ON, the current increases with a positive slope ((Vin/2)/Lm). After that the Lm current continues with a ...
analog_designer's user avatar
2 votes
1 answer
90 views

PMDC motor stops spinning when speeding up with pedal

I am driving a PMDC motor with a half bridge circuit in which the low side MOSFET is a freewheel diode and it is always at "on" stage. I am only switching with the high side MOSFET via an ...
MSB's user avatar
  • 27
0 votes
1 answer
62 views

Building a half-bridge zero-voltage switching inverter for induction heating

I am not an electrical professional so please me patient with me. I'm trying to build a half-bridge ZVS inverter for a small induction heater (I want to try to do some small scale welding). I tried my ...
Brick's user avatar
  • 1
0 votes
3 answers
140 views

While testing unloaded half-bridge, driver self-destructs

I have an IRS2153D configured so that the driver power supply is separate but not isolated from the half-bridge power supply. As soon as I place 12 V across the unloaded half-bridge, the driver bricks ...
ElectronicsNoob's user avatar
0 votes
1 answer
58 views

Half-bridge driver ground loop elimination

I built this half-bridge driver using a generic Schmitt trigger/hex inverter IC and a 555 timer as the square wave generator. By varying the value of the resistors, the dead time can be adjusted and ...
ElectronicsNoob's user avatar
1 vote
1 answer
44 views

Half-bridge driver giving high-side gate full input voltage

Using an IRS2513 half bridge driver tuned at 30 kHz with 1MBH60-100 1000 V, 60 A IGBTs, the driver is giving the high-side gate the full 24 V input voltage. I have included a picture of how I ...
ElectronicsNoob's user avatar
0 votes
0 answers
40 views

Infineon IRS2008STRPBF Half Bridge Driver - What am I doing wrong?

I'm working on building a simple DC motor controller consisting of 2 half-bridges. I'm just going to show half, since that's all I've breadboarded at this point, but I can't get this chip to show any ...
Jeremy Blalock's user avatar
1 vote
2 answers
247 views

Half Bridge Impedance Matching

I’m currently building a half bridge induction heater and can’t understand impedance matching for the life of me. Here’s an example of a basic half bridge induction heater. How and why was 45uH ...
ElectronicsNoob's user avatar
0 votes
2 answers
380 views

BLDC motor controller not starting the motor until I push the motor a little, then it works just fine

I am trying to build a controller for my 48 V BLDC motor using IR2110 gate driver and IRF1407 mosfets but the issue is if I increase the duty cycle of the PWM, the motor won't start running at all ...
Sanchit Awasthi's user avatar
2 votes
2 answers
210 views

What is the average value of current in uncontrolled rectifiers with rl Load

I am trying to calculate the average value of a current in single phase rectifier half wave and in the full wave with RL Load. The thing that I am finding interesting is that in all the tutorials and ...
Badr Eddine's user avatar
0 votes
0 answers
39 views

Design of an auxiliary power supply for high voltage converter

I have a half bridge converter going from 270V to 24V, and I need to create an auxiliary power supply for my controller/drivers/etc. So I need a design with a high step-down ratio in order to go from ...
PosFLo's user avatar
  • 11
0 votes
0 answers
159 views

Is it possible to make a halfbridge coilgun with high side IGBT and low side SCRs?

In a rather simple coilgun, the problem of freewheeling current from the coil is solved with a diode in parallel with the coil. The energy of the reverse current is wasted this way and even slows the ...
kall gakr's user avatar
1 vote
1 answer
88 views

Odd bootstrap design for high-side gate drive

The above circuit utilizes a bootstrap design similar to this next illustration, Image source: Toshiba - MOSFET Gate Driver Circuit - Application Note I understand quite well how the capacitor C2 is ...
user avatar
4 votes
2 answers
372 views

Supply of the primary side of the transformer in a forward, half-bridge converter

Why is it that in most forward, half-bridge converters, one of the transformer windings is connected with two capacitors (to VCC and GND): when my simulations shows that one capacitor (that block DC ...
piotr's user avatar
  • 292
0 votes
0 answers
55 views

Active Half-Bridge Driver Circuit

Consider the folLowing half bridge circuit: I'm designing a half-bridge circuit to be controlled by a microcontroller. Ultimately, there will be 3 copies of this circuit for an ESC. I am hoping to ...
Levi Applebaum's user avatar
0 votes
0 answers
49 views

Only using low side of high/low mosfet driver - can I leave the high pins disconnected?

I have the below circuit for a high/low mosfet driver half bridge, with an extra low side for running a brake resistor (note this is just one of the 3 half bridges for the BLDC controller) I'm using ...
Simm's user avatar
  • 129
0 votes
1 answer
595 views

Half-Bridge with N-channel Mosfets and IR2101

I am building a half-bridge with IR2101 as half bridge driver and I am being confused by something in the datasheet of IR2101. My main supply voltage will be 40V. The VCC of the IR2101 will be 15V ...
Muhammad Usman's user avatar
3 votes
1 answer
129 views

Gate spikes in half-bridge IR2110 driven

Some time ago I posted a question about weird oscillograms of half-bridge, gate spikes on mosfet openings. After some investigation, it was revealed that the problem is not in transformer leakage ...
Erch's user avatar
  • 41
1 vote
2 answers
139 views

Half-bridge oscillogram spikes, possible shoot through

I built a half-bridge smps based on IR2110S, it is working but the oscillograms seems weird and mosfets are a little hot. LOW side mosfet Vds. Two oscillograms, mosfets midpoint as oscilloscope ...
Erch's user avatar
  • 41
6 votes
4 answers
1k views

Schottky diode between the gate and source in half-bridge power section

Why some MOSFET half-bridge power sections have Schottky diodes between the source and the gate of MOSFTETs? For example D1 and D5 in the schematics here:
jpou's user avatar
  • 219
0 votes
2 answers
72 views

Why I'm getting different values than the simulator in precision half-wave rectifier?

I've build this circuit on the breadboard and with 5V AC I'm getting 2.5V at the output: simulate this circuit – Schematic created using CircuitLab The problem is in the simulator it outputs 1....
ElectronSurf's user avatar
  • 2,396
2 votes
2 answers
206 views

How much voltage must a MOSFET withstand in a half-bridge configuration?

It seems a bit silly and I guess I know the answer but I don't know why it gave me some confusion, in a half-bridge configuration like the one in the image: If between DC-Bus+ and DC-Bus- there is a ...
WalterPH's user avatar
  • 440