Questions tagged [h-bridge]

A circuit which allows power to be applied to a load in either direction. Often used for reversible motor control.

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36 views

Polarity switching circuit

I have a variable resistor as a load that want the current to remain constant by changing the voltage, This circuit also has polarity switching (like H-bridge). Each time the circuit is turned on, ...
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PWM driven MOSFET to power a coil

I need to power a coil (electromagnet to be precise) using a PWM singal generated by an arduino or a 555 timer. I can esily power the coil when the PWM signal is in the HIGH (5v) state using a simple ...
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H-bridge made of MOSFETs

If we have an H-bridge made of 4 N-MOSFETs, the gate voltage applied to each pair must be different because in an active circuit the sources will have different voltages. How much?
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178 views

An inverter without a transformer?

I am trying to build an inverter without a transformer. I want to use a 12V battery connected to a boost converter which will boost the 12V to 120V, then simply attach an H-bridge to the 120V boost ...
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89 views

How can I decrease power losses of H-bridge with 4 N-channel MOSFETs?

This is my H-bridge circuit. I need to change the polarity and found this circuit from the site. I need 0-200 amperes for the load. I want to use the IRF1404 and parallel them, but I have two problems:...
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PNP and NPN H-Bridge - Drive PNP from opposite output

To drive the PNP transistors on an H-bridge circuit, the control voltage needs to be at least the input voltage, or a secondary stage is driving the high-side PNPs. I have come across a circuit that ...
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50 views

Motor impedance too high at 20kHz

I have an H-bridge I am driving with an Arduino Mega. The motors I am driving are fairly large, steady state 48 watts, maximum 300 watts. I am driving them at 16 volts and a switching frequency to ...
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42 views

DC motor interfering with another

I have two H-Bridge drivers controlling two geared DC motors. These are the modules I am using : https://www.handsontec.com/dataspecs/module/BTS7960%20Motor%20Driver.pdf I have two of the above ...
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How can i make the pulse at V2 shift by 180 degrees in order to make it a negative 7.2 symbol for H bridge motor

This is the circuit I built in Lt spice. The NMOSFETS I downloaded online have 1,2,3 automatically i cant change the label. 1= drain, 2 = gate, 3= source. This is the result i get However i need to ...
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Question on H bridge motor circuit

I just finished task 1 on my project but my teacher has not provided any good guidelines so I was just hoping if you guys could check my work before I move on to step 2 and let me know if I'm correct ...
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h bridge motor circuit on LT specie

I've been working on a project where i'm building a h bridge motor circuit i have easily spent 15 hours on it and have made extremely slow progress on it in the last 3 days. The project sheet is seen ...
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Is the DC-Link capacitor (C1,C2) necessary in cascaded H-bridge to achieve more balance and reduce stress on switches?

What is the purpose of the dc-link capacitor? (Cascaded H-Bridge topology is free from voltage balancing problem because it does not contain DC link capacitors. but Many papers discussed this issue in ...
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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 "...
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92 views

NPN transistor turning on with grounded base

The NPN transistor in bottom left with grounded base is turning on in circuit simulator for some reason. Can someone tell me why is this happening? Circuit Simulation link I know why the other 3 ...
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H bridge working with led but not with electric motor

Noob here. I am trying to make a car which i can control remotely from the internet (ie. lan). I have a H-bridge circuit which has all NPN transistors (bc 547B and datasheet here: https://www.farnell....
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Arduino compatible H bridge behaving unexpectedly

I have built an h bridge in a circuit simulator for controlling my brushed DC motor such that it can work with 5v supply from Arduino Uno here is its link to play around with the circuit Circuit ...
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H bridge with a single I/O control and NPN at the top

I want to control a 4V motor to rotate both directions which draws 100mA and I was looking at the H-bridge schematics. The tutorial says that you should place NPN transistors at the bottom if you need ...
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Suitable Half Bridge Driver to control capacitve load

I am looking for a method to reliably and quickly charge/discharge capacitors. Each capacitor should be individually charged/discharged. The charge/discharge rate should be in the microsecond range (...
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Arduino/RPI module to control LED fairy lights with reverse polarity

I cant find any module to control my garland of lights by any embedded device. This module should be powered by DC12V input (but also possible to use Step Up/Step Down DC-DC voltage converter). The ...
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How to select appropriate capacitor for an H-bridge

PROBLEM: Considering the figure below, I need to select an appropriate bank of capacitors for a 3 half-bridge brushless controller, which system have this characteristics: VM = 60v (maximum); Max ...
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Issue with H-Bridge simulation waveform

I've built a simple H-bridge circuit with LTSpice: DirSigA (blue), DirSigB (red) and Vout (green) waveforms: DirSig A and B are both pulse signals with a Vmax of 5v. I've been tinkering with the ...
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52 views

Unable to control 24 VDC brushed motor with dev boards

I'm designing a board that has to control several DC brushed motors. The motors are SY54E-DC24V-2PCE. I didn't find a datasheet but some references like this and this. I measured the DC resistance of ...
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87 views

H Bridge problem [closed]

I have been banging my head on this puzzle for a few days now, need some help from the experts... Here is the schematic of my first attempt at an H bridge for an RC car. The motors ( two in parallel) ...
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66 views

H-Bridge power supply

I need to separately power the transist MOSFET with a higher voltage than maximum VDD of the driver MOSFET. Is the diagram correct? Will the driver fully open the transistor? TC4428 Datasheet AOD603A ...
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52 views

How to combine H-bridge with high current pwm smoothing filter

I would like to drive a peltier (rated max 12V, 5A) with three considerations: i want to control the voltage absolute value with a PWM signal from an arduino (30kHz), the voltage across the peltier ...
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Can we use bootstrapping technique for resonant inverter?

I am developing a resonant converter and could not understand which technique is not be used for the H-Bridge inverter so the MOSFETs can switch properly. I am using IRF540n N-channel MOSFETs.
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How to analyze this MOSFET H-bridge circuit?

In my university electronics course project, I am asked to analyze an H-bridge circuit. It is a simple H-bridge in which the motor is represented with a 37 ohm resistor and thus has no diodes. The ...
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23 views

Stop a Relay H-Bridge for Brushed DC-Motors to get burned

i am using two Relays to create an H-Bridge. This H-Bridge drives a 24V Motor ~3A in both directions. Now i often got the problem, when i turn on a motor and turn it off again, the relay contacts are ...
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58 views

Choosing Full Bridge Gate Driver

I want to use an H-Bridge module as a switch in a 12V DC circuit and would prefer, if possible, for ease and simplicity, to use a full-bridge gate driver such as the IRS2453DS. The H-Bridge comprises ...
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69 views

MOSFET Circuit To Alternate Polarity

I am trying to reverse engineer and understand the following circuit found in an LED lighting controller. The OUTPUT is basically a 12V supply where the polarity can be selected by the MCU (Q7/Q2/Q1 N-...
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Controlling DC motor with H-Bridge motor driver and a relay

I am trying to build a smart car. I have 4 DC motors with tires. They are yellow 3-6V hobby project motors. I have two L298 H-Bridge boards and 1 relay. I connected two of motors to one H-Bridge and ...
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Using Dual [High Side/Low Side] Isolated Gate Drivers

When in general is it easier, even preferable, to use a dual isolated gate driver on an H-bridge with IGBT power transistors, rather than separate high side and low side drivers; what if any are the ...
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Non-zero voltage between unloaded h-bridge output and input

I have an unloaded h-bridge, with the following layout: U6 & U9 are totem-pole mosfet drivers--nothing particularly exciting there. When I have Q1 & Q7 on, I find that there's 70mV between ...
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H-Bridge current limiting

I am designing a simple H bridge circuit for use with the Atmega8 microcontroller. The DC motor moves this application a lot and generates 140 mA current spikes (DC motor locked) or 60 mA with normal ...
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89 views

How can I calculate the dead time to prevent shoot-through?

From Figure 1 is evident that to get the dead time I must define the values for RC. E.g my resistor is 220 ohms and capacitor is 0.1uF this gives me 22us at 1-time constant, however, when I measure ...
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Back EMF protection of a bi-directional inductive load

I have been researching this subject for some time now and I found three ways to deal with this issue but I can't make up my mind on which one is the best for my application. I have a high torque 12V ...
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69 views

Problems H-Bridge on PCB taking all the current

I try to make a system to lift up and down a door for a chicken coop. When I did it on a breadboard, everything was working correctly but now that I use a PCB, when the H-Bridge is connected, the ...
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Facing problem in converting single phase arduino code into three phase for 5 level inverter

I am making 3 phase inverter using 5 level inverter technology using arduino nano. The code i am having is for only single phase 5 level inverter but i want to make 3 phase inverter using this code ...
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Half H-Bridge using IR2104 doesn't work

I'm trying to build a half H-bridge using an IR2104 driver. I want to use it for driving "high power" things such as a brushless motor (100V, 40A), or high power LED (200W). But it doesn't ...
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Calculating the MOSFET gate resistor for an H-bridge driver

I'm designing a DC motor driver using Allegro's A3941K driver. The block schematic shows a gate resistor for the MOSFETs. The A3941 gate structures are as below, The ...
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Getting More Power out of an H-Bridge

tl;dr: how to design an h-bridge to give more power to motors. pre-fab circuits are not an option. Hi, so for my electronics class we have to build robots from scratch. So no pre-fab circuits (with ...
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Connecting many electromagnets with polarity control

I'm trying to see if it's possible to build a large grid (hundreds) of electromagnets, where very electromagnet should be able to get both directions of currents (to generate magnetic fields with both ...
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98 views

TLC5940 resets itself when driving certain DC motors

So I had the following setup: I was just driving a small DC motor with this circuit by either sinking current on pin 0 or 1 on the TLC with a motor voltage of 5 volts and everything was fine. The ...
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120 views

Energy conservation when adding braking resistor to H bridge?

This may be a stupid question but I'm missing something fundamental about energy conservation of electrical machines - I am sure I have forgotten something from basic machine theory but I haven't ...
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159 views

Severe ringing when using high-level gate driver (HIP4081)

I am working on a project using the HIP4081 full bridge driver. I prototyped the working circuit on a breadboard experiencing heavy ringing on the gates of the high side MOSFETs (the ringing also ...
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H-bridge produces square wave output under heavy inductive load instead of sine wave

I was Following this tutorial to make H-Bridge. I have first did some simulation and the following image shows the same. I don't have schematic because I directly made the circuit by hand based of ...
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106 views

Using h-bridge with LED fairy lights

I have a string of LED fairy lights (5v) that when I connect to power, only half of them light up. If I reverse the polarity, the other half light up. It’s my understanding that I need a h-bridge to ...
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BJT h-bridge shoot-through problem

I made an H-bridge using this schematic: Although the circuit mostly works fine, there is noticeable shoot-through.Even with no load at 150-200hz the input voltage drops by a lot.I added dead time of ...
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39 views

H-Bridge simple performance

I design a simple H bridge. The bridge is controlled by a PWM signal with a frequency of 125kHz. The load is the LC resonance circuit. The maximum current is about 3A. Everything is powered by a Li-...
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Killed two Teensy 4.0s with this circuit - looking for help diagnosing

I have created a circuit for my Senior Design project at my uni. This circuit is meant to receive a signal from a contact microphone attached to a brass instrument, pre-amplify it, and analyze to find ...

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