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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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1answer
50 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 BS170 D3/D4 are 4 x 4148 the 2 ...
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3answers
42 views

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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0answers
54 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 ...
2
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1answer
42 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
63 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 ...
0
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1answer
33 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" (...
0
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1answer
64 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 ...
2
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1answer
46 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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2answers
116 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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3answers
156 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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0answers
29 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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0answers
26 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
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0answers
65 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 ...
1
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1answer
85 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 ...
1
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0answers
49 views

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 ...
3
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2answers
146 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 ...
0
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0answers
51 views

Why the mosfet's gate resistor show this current consumption?

Here is my H-bridge circuit. and here is the graph of the current of R1, with LTSpice My calculation for the bases of the pnp & npn Vsupply -((Vbase Q3 - Vbe) / R5) x R3) 24V -(((3V3 - 0.65)/...
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1answer
30 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 ...
0
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0answers
45 views

STM32 PWM Idle State not persisting

I am making a half bridge driver that is being driven by an STM32. It uses TIM1 and the PWM from channel 1 and its complementary signal (the complementary signal is driving the low side of the bridge)....
0
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2answers
73 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
9
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2answers
2k views

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 ...
0
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1answer
43 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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0answers
30 views

Why the half bridge bootstrap driver (L6384E) doesn't output anything no matter what?

I've been trying for the past few days to get the L6384E half bridge driver to work, the schematic provides the following circuit suggestion: This below is the circuit that I am using, and all I get ...
0
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1answer
61 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 ...
1
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1answer
62 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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0answers
28 views

SMD NP0 soft termination or SMD Film capacitor for SMPS filtering and AC switch loop

Hello I have a problem where I've to select a suitable decoupling/bypass capacitor for the AC-path for the switch noise for the 400V switching H-bridge where I need low height of components. Where the ...
0
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2answers
116 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/...
0
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1answer
55 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 ...
1
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1answer
73 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, ...
0
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1answer
56 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 ...
0
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4answers
305 views

How to control a motor driver (BTS7960) without PWM

Using a Raspberry Pi 3B+, I need to control a motor which works in 12V and can draw up to 2A. It doesn't use PWM. It just goes in one direction or the other (reverse/forward) when interchanging the +/-...
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2answers
100 views

MOSFET's getting too much heat up without any load

I am working on inverter, MOSFETs in h-bridge inverter goes heat up without any load attached. I also attached pull-up and pull-down resistor on it. here is my circuit duagram. EDIT Sources of PMOS ...
2
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0answers
67 views

MOSFET burn down due to droping logic level voltage [duplicate]

I made 2 PCB, one is a logic driver with NAND Schmitt trigger (74HC132D & CD40106B) to drive FORWARD and BACKWARD of H-bridge channel, the other board is the H-bridge Power MOSFET, which used 4 P ...
0
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2answers
108 views

H-bridge motor controller [closed]

I made a circuit but I am not sure it is going to work. The circuit is supposed to drive a 36 V 28.5 A motor. I am having trouble finding out if applying 5V to IRLZ44PBF would open it fully and allow ...
0
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1answer
150 views

H-bridge MOSFET NAND gate driver suffered from logic voltage drop

I've tried to reproduce the NAND Schmitt triggers circuit to drive my H-bridge MOSFET as per following source: http://axotron.se/index_en.php?page=34&chapter=0 All my design files are at this ...
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2answers
116 views

mosfets in h-bridge get hot on idle load

I'm trying to build cheap H-bridge driver to operate under 12-24 input voltage. I used 12v regulator as separated Vgs voltage driver, also to increase load current and I paralleled two MOSFET with ...
0
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2answers
193 views

pull-push gate driver for H bridge circuit

To drive power MOSFET following circuits with different pros and cons has been used type A type B type C type c which is called pull-pusher gate driver can used either P or N mosfet in h-...
0
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1answer
80 views

Need help with troubleshooting an H bridge circuit

I designed an H bridge using the DGD0506A gate drivers. https://www.diodes.com/assets/Datasheets/DGD0506A.pdf I used the FDMC7696 for both high side and low side mosfets. I went with the suggested ...
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2answers
118 views

How to get Convert DC to AC for higher frequency with H-Bridge? [closed]

Require High Frequency AC supply (300 V, 1-2 kHz), as of my knowledge increasing frequency AC-AC is hard compare to DC-AC. So I decided to input DC and get AC of 300 V, 1-2 kHz. Please help how to ...
1
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1answer
175 views

MOSFET H-Bridge Design - Capacitor/Diode/Resistor Selection

welcome to my first post! I am designing a small 3-phase Brushless DC Electronic Speed Controller (ESC). The design utilizes 3 half bridges and a FAN7388 driver IC. The FAN7388 datasheet has a ...
0
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1answer
312 views

Ultrasonic cleaner control with Arduino

I'm trying to build a small sized ultrasonic cleaner. I bought a couple ultrasonic transducers (ranging between 40kHz - 102kHZ and 15 - 35 watt) which I want to play around with. There are already ...
0
votes
1answer
62 views

H-bridge driver circuit where voltage is higher than control ic

I am using an H-bridge to give a clock time signals. The H-bridge is controlled from an ESP8266 (Wemos D1 mini board) The clock requires an 18V signal (alternating every minute for a fraction of a ...
0
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2answers
88 views

Electromagnet Polarity Reversal Doesn't Matter?

I am working on an engineering design project for school which uses the electromagnet linked below to "lock" a door. The problem is that the electromagnet remains energized or magnetized even after ...
0
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1answer
115 views

use bjt or mosfet in h-bridge with inductive load?

is it better to use 2 pnp bjt in high side and 2 npn bjt in low side of an inductive load drive h-bridge ? or using 2 pmos in high side and 2 nmos in low side of h-bridge? what are the advantages ...
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0answers
69 views

Dual H bridge circuit design

For a project I need to design a dual H bridge to drive two motors with the specs provided below: Output speed: 150±10%rpm No_load Current: 200mA (Max) Stall current: 4500mA(max) ...
7
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4answers
2k views

Why don't flyback diodes in H-bridge damage power supply?

I'm currently learning about driving a small DC motor (~ 5V). My research so far indicated that a L298N might be a good choice to quickly get something up and running. However, I'm also trying to ...
1
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2answers
109 views

T.I H-Bridge design with No protection diodes?

I am still on my struggle trying to design my own Brushed DC H-bridge with all N-MOS, still in the research stage and burning mosfets left and right. I have come across this T.I design ,relatively ...
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2answers
115 views

Why should half-bridge driver have resistance in series with VCC?

I am using the three of the RT9624A half bridge driver as part of a 3-phase motor control circuit. Everything was working well in testing until I got to about 80% duty cycle and one of the drivers ...
0
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1answer
83 views

H Bridge only working one way

I have this schematic. My problem is it only turns the motor when I supply the 5v to the right transistor (Q2). I remove the 5v and put it on Q1 and nothing. I've replace all parts and still does the ...
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3answers
238 views

How to protect H-bridge from burning

I'm building an H-Bridge to drive a 5v DC motor. We made the circuit with SMD components And everything works properly. But the problem arises when the motor output gear is held manually. The motor's ...