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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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Driving stepper motor with H-Bridge, how many Volts?

I know that stepper motors are usually driven with current-limiting chopper drivers and hence the applied voltage doesn't really matter (or does it?) and that's why specs of stepper motors don't state ...
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43 views

Drive H-Bridge using analog signal instead of pwm? [on hold]

Is it possible to drive an H-Bridge like the L298n using actual analog signals rather than digital PWM signals? If not, what would be the equivalent to an H-Bridge that allows for this?
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35 views

H bridge using DPDT relay

I have a DPDT relay and I would like to create a H-bridge. How do I implement a H-bridge with a DPDT relay?
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69 views

Forward diode characteristics not starting from zero Ampere

Why the current is not starting from zero, whats the diode characteristic when current is near zero? Reading the datasheet for N-channel 60V MOSFET, I encountered this source-drain characteristic of ...
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31 views

L6203 motor driver with high Rds(on)

The L6203 states that it typically has and Rds(on) of about 0.3 ohm. After implementing the circuit below, I'm measuring a significant voltage drop across the transistors when the motor is stalled (or ...
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18 views

Correct way to drive the L6203 Full Bridge driver

I need to control a brushed DC motor in both directions using the L6203. The block diagram is shown below. Motor voltage will range from 13 to 16.8V, with a maximum RMS current of around 3A. From the ...
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96 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 ...
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40 views

Doubt with spliting pwm signal [on hold]

I am using a MIC4606-2YTS-TR (full bridge driver).it works with 2 PWM Inputs but I only have one. Can I split the my PWM signal in two .
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66 views

Will this circuit be able to power a 12V DC motor

The circuit below is designed to power a 12V DC motor, which has to operate in both directions with variable speeds, using the Arduino as control unit. The center components (resistor, coil and ...
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44 views

IR2101 MOSFET driver shows error

Here is the circuit I am trying to simulate, with HIN and LIN at 5 V PWM, 50 % DUTY cycle. The circuit runs OK for 2-...
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1answer
38 views

Intelligent IGBT Module for Motor drive [closed]

I am looking for IGBT module for motor drive.. Approx. 50A, 1200V rating. 7 Pack module, Including Inverter + Brake circuit + Built-in drivers For this I have found a module and it's datasheet ...
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70 views

Don't know which transistor I should use

I am new to transistors. I want to know which transistor I should use which will suffice for my H bridge. My motor draws 1.2A at 6V when stalled.
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L298N motor driver not working after connecting SPST switch

So when I had all wired as depicted in the first image, it worked fine, no problems. The red LED on the L298N board was illuminated and the dc motor was following commands from my Raspberry Pi. Now I ...
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Insufficient torque from motor connected to H-bridge

I'm currently attempting to convert my son's broken 1:14 scale R/C Bugatti Veyron (similar to this) into an app-controlled car using an Onion Omega with a servo/PWM expansion. However, I am having ...
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36 views

Half H-bridge using only ntype mosfets or npn transistors

Would the following circuits work? I keep thinking I need a mixture of ptype and ntype mosfet or npn and pnp transistor for a half h-bridge, but I keep seeing schematics with only ntype mosfets or npn ...
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80 views

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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41 views

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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1answer
70 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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19 views

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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73 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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57 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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34 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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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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75 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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55 views

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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28 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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54 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
70 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
52 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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30 views

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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129 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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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
140 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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286 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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83 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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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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130 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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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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69 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
51 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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84 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
46 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
75 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
85 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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384 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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204 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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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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117 views

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