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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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High voltage and current

I have a DC motor that needs and works nearly 400v and 20A. I chose FDL100N50 for n-channel mosfet also IXTK40P50P for p-channel mosfet. I connect a 4n35 optocupler for output of every mosfet. Are ...
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Why ACS712 is abruptly dropping its voltage output?

I have built a board as shown in the images and the schematic below. I know that according to the datasheet when no current is flowing through the ACS712 it should output something around 2.5V always. ...
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58 views

Simplifying H-brigde circuit

I am currently trying to build a PWM H-bridge, it has a power line of 12 V and the arduino uno provides the PWM. The MOSFETS I have are: IRLZ44S (N-channel) and FQD11P06TM (P-channel). Basically, the ...
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H-Bridge Low Side Sense Resistor - Position of Resistor and Bulk Capacitance

My question regards the considerations required in determining the location of a current sense resistor on the low-side of an H-Bridge. I've presented two scenarios. Details: The H-Bridge load is a ...
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Converting boost controller to sync boost controller using H-bridge or 2 gate drivers

I am trying to reduce power losses in a boost led driver. For example TPS92690, uses a MOSFET and a diode for boost mode. Is it a bad idea to use H-bridge instead, or two gate drivers (one in straight ...
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56 views

Why isn't fast decay mode on an h bridge damaging

I'm struggling to understand how fast decay mode works on an h-bridge used for stepper motors . Particularly I've been looking at fast decay mode in this data sheet: http://www.ti.com/lit/an/slva321/...
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55 views

Can a L293D H-bridge be used for this application?

I'm building a circuit that is needed for a logging device we have. With some of our sensors the current is going in one direction and with others the other way around. That means that we have a ...
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32 views

AC MOSFET H-bridge

Would appreciate an explanation of how this circuit works. It is a MOSFET H-bridge that takes a square wave input and either passes it through unchanged or changes its phasing 180 degrees. The “...
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How does a electropermanent magnet work?

I’m trying to wrap my head around electropermanent magnetism. I read this wonderful PhD Thesis by Ara Knaian as well as details the history of this concept as well as Kyle Gilpin, Ara Knaian, and ...
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26 views

What's wrong with my IR21531D H-bridge gate drive?

I'm new to here. I am recently making an H-bridge inverter with IR21531D (here is the data sheet). I connected them this way: When I measure the Lo and Ho pin with passive probe and differential ...
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2answers
46 views

H-bridge design for Peltier

I am using a pelter module to cool a chamber, I also use the same module to heat the chamber just by reversing the voltage to to.(separately tested and working). This lead me to look for a H-bridge IC ...
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Alternate uses for Gate Driver - Driving a Load without External IGBT or FET

What issues would one encounter by using a gate driver IC to directly drive a load instead of using it to drive transistors? For consideration would be the very affordable Infineon 2EDN752x series ...
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driving high side H bridge inverter

i still get confuse to understand the high side driving of H-bridge mosfet, it is said that to drive the high side, voltage at its gate have to be greater than the drain voltage, is it true? so when i ...
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1answer
27 views

Question about the role of specific element in a circuit (H Bridge)

I am currently studying different ways to design an H - Bridge and came across this circuit. I have a good idea how the bridge works except for the two transistors on the bottom that I have red ...
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1answer
36 views

What is miller shoot through voltage (aka cross conduction)?

Im studying mosfets switching characteristics and one thing I happen to come across is the concept of "cross conduction".I searched around the web and couldnt find answer to my question.Kindly read ...
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1answer
43 views

Channel 4 in STM32 Advance Timers TIM1 and TIM8 [closed]

There are advance control timers in STM32 family as in STM32F407 and these are specially suited for 3-phase (or 1-phase also) motor control applications using full H-bridge. These timers provide ...
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1answer
47 views

Calculating H-Bridge without motor specifications [closed]

I am currently calculating elements for an H-Bridge for brushed dc motor and PWM speed control that operates on 6V and maximum current of 2A. However I want it to work with different 6V brushed DC ...
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Shorting the output of both the channels of L298N

Suppose I started with a project requiring the control of motors and ended with using L298N in my project, realizing that my motor only takes around 1.5A when on load. Now, with time I realized that ...
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84 views

Voltage spikes in h-bridge inverter square wave output

I apologise if this is a repost but I couldn't find the problem anywhere else. I am trying to power an ultrasonic transducer using an h-bridge inverter design to convert arduino signal into a higher ...
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53 views

What would happen to the voltage or current flowing through the motor in an h-bridge

I was wondering if some one could help me understand what would happen to the motor if I suddenly change the rotation from clockwise to anticlockwise or vice verse in an H-bridge configuration, would ...
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1answer
65 views

3 phase Bldc hall sensor problem

I am trying to drive a 350 watt, 3 phase, BLDC motor (DGW07-20j model) with stm32 micro controller. But I have problem with hall sensors because their outputs are not similar to the hall sensors which ...
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2answers
156 views

How to reverse direction of stepper motor with flip-flop

I am trying to reverse the direction of a stepper motor. The stepper motor drives a scanner head and when it gets to the end, I want it to reverse direction. I have some photo interrupters that ...
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1answer
78 views

H bridge design for bipolar motor

I'm working on a dual H bridge for a bipolar stepper motor. I found these two designs. I would like to know which design would you guys recommend and why? and if there is any component that might be ...
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2answers
47 views

L298N H-Bridge : Powering 4 motors using (6) aa batteries vs (4) aa [closed]

I am currently wiring up my raspberry pi, H-Bridge and (4) 3-6v ratting motors. My question is, how will performance change based on me using 6 or 4 batteries to power motors? I noticed some tutorials ...
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1answer
102 views

Freewheel diodes and shoot-through prevention required on this low-voltage H-bridge?

I have built the following h-bridge: VMOT1 is at logic level (3.3V) FWD and REV are driven by MCU (no PWM in the scope examples given) Q7/Q8 are DMP1045 Q9/Q10 are BSS138 D3/D4 are 4 x 4148 the 2 ...
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3answers
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Can I drive a high-side N-channel MOSFET with NPN transistor and extra battery? (H-bridge)

I read discussions about only using N-channel MOSFETS in h-bridge circuits. I often see things like optoisolators listed. Example: driving high-side N-channel MOSFETs in H-Bridge But why can't I just ...
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59 views

Why H-bridge isn't working properly?

I am making a circuit to control a motor using an Arduino UNO and an H-bridge IC, but it's not working, rather something strange is happening. Circuit's scheme: When the motor is connected to pins 3 ...
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1answer
50 views

Cost vs quality and performance of H-bridge

I'm working on a project where low cost and small BOM is just as important as optimal functionality. The goal is to drive a cheap DC motor (aka 'yellow motor'), in two directions, optionally with PWM. ...
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2answers
75 views

H Bridge extreme voltage drop

I was trying to implement a H-Bridge circuit but had a lot of failures. I'm not really good with electronics, just some basic knowledge. So I've started by creating an buffer to switch the full ...
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1answer
43 views

How to measure current on low voltage/current brushed motor driven by H-Bridge?

I have a gearbox which transforms the rotational movement to linear movement. It drives a pin which moves back and forward using a DC motor. I need to know when the pin reaches the two "end-stops" (...
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1answer
71 views

H bridge Inverting Wave issue sound from gate driver

[![enter image description here][1]][1] I am trying to drive H bridge using the following configuration I am producing an inverting. 4 * N channel mosfets Fdd8447 gate driver ic TC4428 (used ...
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1answer
61 views

What methods exist to introduce dead-time in a MOSFET H-bridge? [closed]

What methods exist to introduce dead-time in a MOSFET H-bridge? (to prevent shoot-through) (other than software methods, or using MOSFET driver ICs with internal dead-time generators)
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175 views

How to calculate MOSFETs gate resistor?

I am using the equation Qg = ig * t in order to calculate the gate resistor which charges the MOSFETs input capacitance (Ciss). The MOSFET I am using is the IRFP4368PBF. So if I use the equation Q=CV ...
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177 views

H-bridge with 7815 regulator

Could anyone explain to me why my 7815 regulator gets hot and eventually blows up ??
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36 views

L298N motor driver output error

I had worked previously on a project which used a L298N motor driver to control motors.Datasheet Link. I have now completed my project and started with the production phase of it. But while I was ...
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Simulate H Bridge in Pspice

I want to simulate an H-bridge in pspice but it doesn't work and Z3 and Z6 (High side and low side IGBTs) can not drive at the same time. Here is my schematic
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299 views

MX1508 motor driver module

I recently bought this MX1508 module from AliExpress. I'm very impressed by its working given the low product cost. I would like to implement this in my next design, but I'm unable to find any ...
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1answer
210 views

IR2110 driver output causing shoothrough despite deadtime

I'm having trouble with the ir2110 output. I'm working on a class d full bridge amplifier and I use 2 ir2110 to drive 4 irf540N mosfets. The switching frequency I use to generate the PWM is 240kHz and ...
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DC motor lock controlled by H-bridge

I'm trying to control a DC motor by H-bridge in my board. The motor works well by PWM signal but, in breaking mode, only the lower switches are on, motor is not locked completely. When I turn the ...
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2answers
215 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 ...
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1answer
71 views

Single PWM input signal to H-Bridge DC/AC inverter

Im attempting to follow some of the multitude of h-bridge designs out there to create an inverter using power mosfets. While I can get the circuit to invert the polarity using the design in the first ...
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2answers
94 views

antiparallel led circuit

Is it possible to glow the both LEDs simultaneously in an anti-parllel circuit? I tried with H-Bridge but I am not able to do it simultaneously. Please help me to solve this problem
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Is this a case of ground loop?

I'm trying to power a 24V DC motor using 2x 12V batteries, an Arduino and a Cytron MD10C Motor Driver. I followed the description on Cytron's website for how to connect the Arduino and the motor to ...
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1answer
57 views

L293D Enable pins can reduce chip heat?

I use a L293D to drive a 7.4V (280mA/phase) stepper motor. I rotate the small motor 1 rev per DAY. The L293D is hot all the time even though the motor turns only once per day. I saw there are “Enable” ...
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1answer
106 views

DC motor H-Bridge - Snubber Cap

I have breadboarded a simple H-bridge shown further down using the mosfets linked below the schematics. The prototyping motor is a DC 12V 1A (NO LOAD) Motor Pictured below: Ultimately I ultimately ...
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1answer
76 views

H-Bridge Adjustable Slew Rate: Why is a decoupling capacitor needed?

I am designing a simple 3-phase inverter for BLDC Motor control. For that purpose, i plan to use a IFX007T from Infineon. The slew rate is controlled via a resistance connected in series to SR pin. ...
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355 views

What PWM inputs are needed to drive a 3 phase BLDC using the HIP4086 IC driver chip?

I am building a motor controller for a BLDC (w/ Hall sensors) using a Teensy. My circuit looks like the typical application diagram in the datasheet (https://www.intersil.com/content/dam/Intersil/...
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1answer
72 views

Simulating 3 phase mosfet bridge with LEDs

I have a commercial 3 phase BLDC motor driver board (TI DRV8323 BoostXL) and I want to write a firmware from scratch. For testing, I want to make sure I open/close the mosfets in correct order. I am ...
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1answer
76 views

Turning an H-bridge/motor off

I'm trying to understand what happens at various points in a circuit during drive-coast operation (and also drive-brake, but haven't got there yet). Imagine Q1 and Q3 are on, and Q2 and Q4 are off, ...
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72 views

Interfacing with (Two) Full-Bridge PWM Motor Drivers to Control a Stepper Motor

I am working to interface with an existing PCB with on-board Full Bridge PWM motor driver chips, which drive a stepper motor. The interface lacks any kind of standard step (clock) or direction signals ...