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

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H-Bridge and bi-directional solenoid

I am having a problem trying to operate a bi-directional solenoid from a RaspberryPi by using an L298N H-Bridge. I am sure it’s a misunderstanding on my part but I hope someone can help me! The ...
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0answers
40 views

H bridge not working [closed]

I'm new to breadboards so sorry if this is due to a stupid mistake. So I have attempted to build an h bridge (so that I can reverse the direction of a motor) but its not working so any help would be ...
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1answer
91 views

Why did I burn my L9110s H bridge

I have recently bought a L9110s H bridge (pictured below), and while testing I accidentally burned it up. I'd like to know why, to avoid making the same mistake and if maybe I should try to get a ...
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1answer
61 views

Hbridge Circuit output

I am trying now to implement Hbridge using 2*p-2*n mosfet "ZXMHC6A07T8 " from zetex semiconductor , I used the offered spice model and I connected simply as and I connected to two PWM what I do ...
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0answers
16 views

Difference between Quad half H and Dual H bridge motor driver?

I was looking about motor drivers, specifically, L293D. The TI page describes it as a Quadruple half H bridge. But on some online stores, it is described as a Dual H bridge. Is there any difference ...
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1answer
39 views

How to calculate the dead time to incorporate in the complementay PWM input to an H-Bridge designed using MOSFETs?

I am working on making an autonomous robot. Right now, I am involved in designing an H-Bridge using discrete components for my robot. I am almost done with the H-Bridge design, and want to test it ...
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0answers
53 views

how to protect h-bridge in a tig welder?

I live in Argentina and I was scammed with a Tig AC/DC Chinese welder, and the official lusqtoff service stole me believe it or not, and with the restriction to imports its impossible to buy a decent ...
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0answers
58 views

Why are the power pins on an L298 H-Bridge named “Vss” & “Vs”

I understand that Vs is where the H-Bridge gets it's power for driving the motors and that Vss is used for driving the logic, and they both sink to a common ground named "GND". My question is why are ...
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1answer
52 views

Somethings about Infineon BTN8962

I want to design a BDC driving board with Infineon BTN8962.(Infineon BTN8962 is a half of H-bridge IC) As we all know,BDC driving circuit is just like this: In this picture,We set a High side MOS(...
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0answers
26 views

Pwm motor Driver

Hello, I was trying to make a motor driver for my project which can power motors at 12V.. For this, I made the same circuit as shown in the image but it is not working for some reason and the ir2110 ...
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2answers
48 views

Motor running slowly with no friction [closed]

This has been troubling me for a while. A few days ago I mounted this circuit onto my breadboard, and even though it works, it does so very poorly. The motor I'm trying to drive is a 12vDC motor ...
14
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5answers
991 views

Is there an ideal PWM frequency for DC brush motors?

I'll be using a microcontroller to create a PWM signal for motor control. I understand how PWM and duty cycle works, however I am unsure about an ideal frequency. I do not have my motor in yet, so I ...
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2answers
72 views

Half Bridge with dual powre supply and two N-channel Mosfets?

I wanted to ask (can't find a straight answer) if it is possible to make a half bridge with two N-channel MOSFETs (I have the solution with one nmos and one pmos, but I'd like two nmos). For the ...
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1answer
52 views

High current motor control

When designing for relatively high currents, e.g. 6-10A, what is the standard practice for motor control? Is it to construct an H-bridge out of discrete components, to use integrated half bridges, or ...
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2answers
154 views

Why do simple H-Bridges that use PNPs combined with NPNs not short themselves out immediately (or do they)?

There is a simple design for an H-bridge that I keep seeing all over the place. simulate this circuit – Schematic created using CircuitLab This design is featured on the Sparkfun ...
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0answers
60 views

What kind of DC motor should I get for raising my blinds? [closed]

I have large blinds that cover sliding glass doors in my condo. Unfortunately, the draw string to raise / lower them pops out regularly. I've decided I want to automate the raising / lowering with a ...
-1
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1answer
73 views

Transistor PWM Switch H-Bridge

Update from old post I have made a completely different design and was wondering if you guys could take a look. Schematics: http://imgur.com/a/5GRe5 Description: Figure 1 is a charge pump, boosting ...
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2answers
135 views

How to connect flyback diodes on a h-bridge [closed]

I'm using a SN754410NE h-bridge to drive two DC motors (4.5V each) with Arduino. After testing the circuit and the code, I made a standalone Arduino on a perma-proto breadboard. My problem is that ...
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1answer
33 views

Microstepping methods for stepper motors: PWM? Phase? Frequency?

I want to know what methods are used for microstepping stepper motors, and their pro's and cons For example, I presume, to hold the motor between two steps, PWM would be most efficient; simple ...
0
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1answer
78 views

h-bridge voltage readings using bipolar junction transistor

I am using the following h-bridge setup using optocouplers, a DC motor and bipolar junction transistors (2N3904 for the NPN and 2N3906 for the PNP) Everything works as expected, but my question has ...
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1answer
43 views

fully Controlled Bridge with BT151

I have tried BT151 for my half bridge controller to drive a DC motor. unlikely, it doesn't work. I would be grateful if you help me through this question. .
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0answers
53 views

DC motor go very slow in one direction

I try to control a simple 6V with an H-Bridge controlled by a standalone atmega328p/pu, but i found a very big problem. In one direction the motor goes fine, but if I try to change the direction, the ...
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0answers
73 views

Bipolar Transistor H Bridge - low side NPN transistors slow to turn off

I've been trying to build an H-Bridge from bipolar transistors. Here are my parts for the schematic below Q1, Q2 - A1694 Q3, Q4 - C4467 Q5, Q6, Q7, Q8 - 2N5551 R2, R3 - 100 ohm R5, R6 - 50 ohm R9, ...
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1answer
144 views

How do you drive a stepper motor with an L9110 driver module? [closed]

I have a dual channel motor driver module based on two L9110 H-bridges: The documentation and many, many tutorials on the internet mention that this can be used to drive two DC motors, or a signle ...
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0answers
62 views

H-bridge porblem

This is my first experiment with MOSFET. I have built this design but the n-channel MOSFET getting hot. Is there mistakes I have made? I have no problems wit p-channel it measured -12V VGS and ...
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1answer
68 views

Motor oscillates when driven by L293D [closed]

I've got problem with steering DC motor with L293D and Arduino. I'm using DC motor from old inkjet printer and a quadrature optical encoder from the same printer to track the position. When I'm moving ...
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2answers
50 views

Diode Sizing for DC Motor H-Bridge

How do I calculate the size of the diodes used in an H-bridge for a DC motor? What is the relationship between the motor parameters and the diode parameters?
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1answer
87 views

H Bridge not working [closed]

I've created an H-bridge for a dc motor that will be controlled by an arduino the bridge has one input and a not gate it has two state forward and backward thats the circuit: it doesn't work :/ How ...
7
votes
3answers
190 views

How to improve the full bridge / half bridge start up time?

I am trying to find out a way to improve the rise /start up time of a series LC circuit placed in a full bridge (or half bridge) circuit. Here is a simplified schematic. The circuit works very well, ...
2
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2answers
66 views

Current chopping with an h-bridge and PWM

I have some stepper motors and L298N dual h-bridge drivers. I can't find exact specs for the steppers,* but similar motors from another product line have rated voltages from 2.64v to 5.8v. Since most ...
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1answer
56 views

Why is bi-directional current sensing required in sensorless BLDC field-oriented-control?

For the past few weeks I've been trying to understand Field-oriented-control for 3-phase motors. Eventually I would like to implement one. I've gone through dozens of application notes from Microchip, ...
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3answers
123 views

Directly driving 5V source MOSFET H-Bridge with 3.3V logic

I am trying to design a H-bridge circuit for my project to drive a thermoelectric cooler (TEC). Basically, I am trying to control the TEC with a voltage source driven by PWM. Now the problem is, I ...
0
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1answer
40 views

Trouble Driving a Solenoid with a LiPo Battery

I am having trouble getting enough current to drive a bi-directional solenoid with two leads. I am using a half of a L293 (Quadruple Half-H Driver) to drive the solenoid back and forth. The solenoid ...
2
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3answers
137 views

Correct placement of freewheel diode

I have two questions on placement of freewheel diode in a H-Bridge circuit: 1) In reference to the general H-Bridge circuit below, wouldn't it be safer to place the freewheel diodes directly across ...
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1answer
83 views

Braking a motor with power transistors

I am running 2 DC motors with 3 SN754410's: each motor gets one half of each bridge. Everywhere I look I see that pulling both logic inputs low with the enable high should brake the motor by shorting ...
0
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2answers
111 views

Control DC Motor with arduino

Recently I bought this motor and I want to control it with an Arduino. I read that I can drive the motor with a H-Bridge with TIP120 Darlington transistors, but the problem is that voltage in the ...
0
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1answer
155 views

N-MOSFET switching an H-bridge: problems with PWM

In this circuit an Arduino digital pin drives the Gate of a N-MOSFET. When the pin is HIGH, current can flow from the H-Bridge GND to board GND. When it's LOW, current can't flow. What I need is to ...
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0answers
50 views

Half bridge mosfet drivers

Hello I'm trying to make a DC-DC converter and I need to drive 2 mosfets using the folowing half bridge driver : http://docs-europe.electrocomponents.com/webdocs/0b3c/0900766b80b3c1b2.pdf Mosfet : ...
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6answers
1k views

Why do my P-channel MOSFETs keep dying in this H-bridge?

So this is my H-bridge: Every time I start using it in one direction the P-channel MOSFET and the NPN BJT which belong to the used direction die in seconds. The killed MOSFET and the BJT developing a ...
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4answers
107 views

Transistor Two Way Switch

I am trying to connect the 47 ohm line from the 555 timer (refer to first picture) to either A1 to turn the motors forward or A2 to reverse the motors. Problem is I don't know how to, with two inputs, ...
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1answer
36 views

Does the pwm pin on an lmd18200 have to be connected to a pwm pin?

I got an lmd18200 connected to an Arduino Uno. The pwm pin is connected to the 10 pin on the Arduino. Will this not work?
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1answer
149 views

Need help trying to design an H-Bridge to power electromagnet

I am trying to design an H-bridge inverter to supply maximum current to my coils. I need to supply as much current as possible so that I can make a electromagnet whose polarity constantly flips so ...
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0answers
29 views

Pulsed H-Bridge is not turning off quickly at the end of each pulse with large oscillation

The schematic below shows the H-Bridge I'm using. I'm sending in 175us pulses of a ~200kHz square wave. Inbetween pulses, the drive signal is 0 volts (or "High" depending on the which gate driver ...
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2answers
142 views

LED H-bridge driver

I have tried to understand the following H-bridge reference design used to drive 2 LED back-to-back. The following image only show one side of the H-bridge. Please correct me if I'm wrong. The P-...
3
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3answers
103 views

How to determine whether I need ESD protection? (MOSFET H-Bridge)

I am designing a H-Bridge using IRLZ44N MOSFETs, IR2104 driver ICs and UF5401 diodes. The current circuit looks like this: It will be used on a battery powered device, so no real grounding ...
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2answers
102 views

Driving an N-Channel MOSFET H-Bridge from a voltage doubler

I've been looking at driving an H-Bridge to raise the frequency of the mains voltage from 60 hz to somewhere between 60-120 hz. I'm planning to use an Atmel Atiny84 to generate my clock frequency to ...
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1answer
55 views

Choosing between a darlington array, H-bridge, and solid state relay

I'd like to use an arduino to switch four separate lamps independently, each of which requires 12VDC and 200mA. It seems to me that this could be done with an H-bridge, a darlington array, or solid ...
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1answer
36 views

Limit current of L6206 bridge driver

I'm currently building my first stepper motor driver, a bipolar stepper, 4.5-48V 1A phase current with 4.5 Ohm phase resistance. I've built the circuit of the L6206 following the "Typical ...
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1answer
36 views

L293DD overtemperature protection

I am using an L293DD Dual H-Bridge IC to power my DC motors. I have realized I am using inadequate heatsinks, and 1,5 times the nominal maximum current(1,8A instead of 1,2A), but the circuit is ...
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2answers
93 views

Do I really need an H-Bridge controller in this application?

I'm looking to integrate a latching solenoid in my next project. I found a 5V latching type here: LHLA0531111H The manufacturer recommends I use an H-bridge to control switching of the solenoid. ...