H bridge? motor control

I want to control a DC motor in both directions controlled by a forward and reverse relay. T

he motor and supply is separate and done by me.

I need to monitor a select-able and adjustable AC Current in the range of 5A to 50A.

Lets say I select and set 20A.

If the current is lower then 20A, the forward relay will energize the motor until the current goes up to 20A.

If the current goes over 20A , the reverse relay will energize the motor until the current drops back to 20A.

The motor is driving a variac (variable transformer). The motor is slow and will not really overshoot. The current change is also very slow. The hysteresis should be not larger then 1.5A

If the control is de-energized, the reverse relay contacts will be closed and the motor will run from the separate power until a limit switch stops it.

If the control is energized there will be 0 AC current and the forward relay contact will close and drive the motor until it reaches 20A. Of course the reverse relay contacts will open.

The supply voltage is 120V 60Hz. I do have 100A CT

People, this is not a huge industrial job. it is single use project. I am hoping there are some electronic modules which can be adapted.

For example, I used a $10 temperature control module (AliExpress) with build in timer and adjustable hysteresis, substituted the temperature sensor varistor with a light sensor. Then I had a light-control unit for street lights which can be very precisely set , we are saving about 2 hours running time per day. In my case a -15C is the perfect switching point for dawn and dusk.

All I need for somebody to figure out how to convert a variable AC current reading (by CT) into a positive or negative signal to control the motor direction relays.

That in my mind is not a $700 job.

I am canceling the project, I have found devices which will do the job, thanks for your interest.

[login to view URL] AC CT input

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Compétences : Microcontrôleur, Ingénierie, Design de circuits

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Concernant l'employeur :
( 0 commentaires ) Chapala, Mexico

Nº du projet : #31866909

18 freelances font une offre moyenne de 432 $ pour ce travail


Hello I have almost 13 years of experience. I have read the details and have a few questions. Please get back to me to discuss it further. Thank you very much.

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 7 jours
(198 Commentaires)

As an electronics engineer, I am the best fit for your project. I bid on your project because I have the expertise and experience to deliver superior quality work. I guarantee you constant updates in the project as a w Plus

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(34 Commentaires)

Greetings, I have read and understood your requirements, I am an expert in Electronics design and development and I can deliver you the H bridge to drive DC motors as per the shared load requirements. Looking to see Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 7 jours
(27 Commentaires)

Hello dear, We are group of professional electrical electronics engineer with h bridge expert and can do your task perfectly just text me so we can help you out with your task Kind regards

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 3 jours
(75 Commentaires)

We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 7 jours
(37 Commentaires)

Hello, I am an electronics and telecommunication engineer and my major is wireless systems' design. I am experienced in hardware and embedded systems' design. I have solid background in power electronics and I have des Plus

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(14 Commentaires)

We will do your work Hi my Professional Aim is: (Services then Solutions then Satisfactions) I hope you are [login to view URL] an experience in this field from last 5 years i am sure i can do it perfectly with in a time and bud Plus

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(13 Commentaires)

Hello, Thanks for posting the project. I am an Electrical Engineer with 30 years’ experience of Customized Product Development for Instrumentation and Control applications. I am based in Kolkata (India) and running a Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 15 jours
(4 Commentaires)

Hello, thank you for your job posting. I have 5 years experience in PCB and circuit design and Manufacturing, Embedded programming, and i can help you with any kind of request in these fields. I will do my best to sati Plus

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(3 Commentaires)

Hola, Buenos dias, Recibida ultima modificacion o notificacion de cambio en el proyecto: Espero logres la integracion de esos componentes a tu proyecto aunque tengo mis dudas. Suerte. Estamos a la orden Saludos Tu p Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 7 jours
(7 Commentaires)

Hello, I can surely help you with controlling direction of DC motor. I am an Electronics and Control Systems Engineer and have rich experience in in designing motor control and firmware for BLDC motor control which in Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% USD en 5 jours
(9 Commentaires)

Hello, This can be programmed using an Arduino along with the output from you shunt. It is better if you have CT instead of shut due to the isolation between the AC side and the control circuit. Let us discuss and solv Plus

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(11 Commentaires)

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(1 Évaluation)

Hello. I am an expert for Electrical and Embedded System Design. To design the hardware (circuit design and PCB layout) and develop the firmware is my main skill. I have developed the firmware(ethernet, usb, oled, WIFI Plus

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Hi, I am Brian. Base on the proposal, it is possible to use a current hall sensor and and simple MCU to control the relay. Just saw you change the description. For simple PCB with simple logic control. It is a quick p Plus

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