Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [h-bridge]

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

Gets its name from the H-shape as it is typically drawn on a schematic.

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How can I implement regenerative braking of a DC motor?

I know that many electric cars are able to convert the momentum of the car into stored energy in batteries, rather than convert it to useless heat at the brake pads. How does this work? How can I implement it myself?
Phil Frost
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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 can't just test it and find out. The picture…
Nate San
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Problems with L293, L298 and SN754410 H-bridge drivers on a low voltage supply

This question is about the following three integrated H-bridge drivers: - L293 or L293D (D = protection diodes added) SN754410 (protection diodes included) L298 (no protection diodes) Time after time the same question keeps coming up - someone is…
Andy aka
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Severe ringing when high side MOSFET in half bridge circuit switches on

I have designed a PCB (intended as a prototyping building block) that has a IR2113 high and low side gate driver driving two IRF3205 (55V, 8mΩ, 110A) power MOSFETs in half-bridge configuration: Picture of the physical setup Upon testing the…
jms
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Calculate DC motor frequency

I am driving a DC motor with H-Bridge Mosfet using PWM. The problem is I don't know exactly which frequency should I use. 1- Do the DC Motors have a very specific frequency for their best performance at all or they have a range of the frequencies…
Mehrdad Kamelzadeh
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Full-bridge converter rectifier kicks

I'm in the process of building an 8kW isolated DC/DC converter, full-bridge topology. I'm seeing some interesting phenomena on the diodes. When each diode becomes reverse-biased, a voltage spike appears across the diode, before settling down to the…
Stephen Collings
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Is this a good design for MOSFET H-Bridge?

I have been looking around trying to design a simple but working H-Bridge for an RC car motor (12V and 2~3A). This bridge will be driven from a microcontroller and need to be fast to support PWM. So based on my readings, Power MOSFET are the best…
Fahad Alduraibi
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H-Bridge Fly-Back

Sorry if this question is a little long, but I though it prudent here to discuss the state-of-the art as I know it before asking the question. ISSUE When using an H-bridge to drive a bidirectional coil of a motor etc, I have always had my concerns…
Trevor_G
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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 understand what is exactly happening (i.e. the…
s1m0n
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Can I wire the two sides of a L293D Dual H-Bridge together if I only need one H-Bridge?

Background: I'm using an L293D dual H-Bridge to drive a DC motor, but only one motor, and the package contains two complete H-Bridges. This is all being soldered onto Veroboard (stripboard). Question: Is it possible to use the two sides of the chip…
Andrew M
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Are Peltier elements polarized?

I'm looking to add a Peltier element to one of my projects. However, I want to sometimes heat and sometimes cool, depending on the ambient temperatures on both sides of the element. Image from Wikimedia commons. My first thought was to use a…
Anonymous Penguin
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Design a cheap 1.5V / 12V DC motor driver for high school students

I am introducing electric circuits to Grade 9 high school students as part of a dedicated engineering subject. The students have no prior exposure to electric circuits. As part of this module I want to design a motor driver for the students to…
Li-aung Yip
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1N4007 comparable with 1N4001 diode?

I'm trying to make a bipolar H-Bridge motor driver. But instead of the mentioned diode(1N4001), I've got a 1N4007 diode. Can I use that instead?
gomek
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Why do capacitors across my FETs minimize ringing/distortion?

I'm designing a 24V to 350V DC-DC Converter based on a H-Bridge. The power requirement is 500W and the circuit operates at 20KHz. The design works fairly well and I've achieved about 90% efficiency at 200W load. The main issue with the circuit is…
Saad
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What does "short brake" mean?

I am reading the datasheet for a TB6612FNG dual H-bridge and see the term "Short Brake". I would like to stop a single motor for an extended period of time. Can (or should) I do this with the short-break function? What does the term "Short Brake"…
j0h
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