B electronic product design

Design requirement for product B

Target: Output constant current through the equipment

[url removed, login to view] voltage:

1.Output voltage: <DC36V; current:0-20A( with constant current set arbitrarily); The load varies in a wide range (0%--100%); The output precision is 0.1A.
2.Through the panel,the value of output current can be set. We can set displaying one information,such as the current、the voltage、the operating life、the external analog signal.
3.Controlling mode
A: Control the operation and work-stop for the equipment through the terminal. Meanwhile the working signal and the obstacle signal are output.
B: MODBUS communication interface: Control the operation and work-stop for the equipment through the communication interface, set output current, meanwhile reflect working condition signal, current signal, voltage signal, obstacle signal etc…
C: Provide electrical power to external sensor through the DC24V power output interface. The equipment have an analogue input interface(4-20mA), whose range can be set and display through the panel. Through the communication interface the equipment can access the data.
4.Protection and fault
A: The circuit has some necessary protection functions, such as short circuit、overload、overvoltage、open circuit etc. It also have automatic recovery function after lifting the alarm. Through the panel, display and fault recording associated with the alarm can be observed.
B: The DC output positive and negative port can be changed at a specific time,which can be set through the panel(between 0 and 60 minutes).
Input voltage:AC220V or DC24V
Output voltage:<=DC36V
Display mode: LED or LCD

Habilidades: Design Digital, Engenharia Elétrica, Eletrônica, Microcontrolador, Layout PCB

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Acerca do Empregador:
( 2 comentários ) Shanghai, China

ID do Projeto: #5083278

16 freelancers estão ofertando em média $3492 para esse trabalho


hi, i am an electrical engineer. i have expertise in embedded system design.i can help you with this project.

$8500 USD in 120 dias
(53 Comentários)

Over what physical connection do you want the Modbus to function? We can make it over ethernet (10/100, using a tcp connection) and plain, uart like serial. Notice that your output cannot be maintained at 0% load, 0% Mais

$5000 USD in 60 dias
(2 Comentários)

Hello. I have 10+ years experience in hardware development (medium-high complexity) - circuit design, PCB routing-assembling, embedded software. I have some questions about your product: 1. Do you need both constant v Mais

$3333 USD in 60 dias
(2 Comentários)

I can complete your project in about 15-20 days. Very good description of the project! Please contact me if you are interested in my offer.

$1500 USD in 20 dias
(2 Comentários)

Greetings, Electrical Engineer (Gold-Medalist) from the oldest and the most reputable engineering institute of Pakistan (UET, Lahore). Done my internship @ US based R&D embedded company “Mentor Graphics” and current Mais

$2777 USD in 60 dias
(6 Comentários)

Design of devices with microcontroller, all the PCB in ares. Programmer in Basic, C and Asambler Engineer Diego

$2500 USD in 40 dias
(1 Comentário)

I can do your project...........................................................................................................................

$2000 USD in 3 dias
(1 Comentário)

we will make it we have exp over 5 years so let me know more details so we can proceed further on this lets discuss more

$6185 USD in 15 dias
(0 Comentários)

I've been a power management microchip designer for over 15 years for Texas Instruments. Many of my designs (regulators, battery chargers, power switches, power management) can be found in various portable electronics Mais

$4222 USD in 3 dias
(0 Comentários)

A proposal has not yet been provided

$4333 USD in 60 dias
(0 Comentários)

Electrical engineer with programming experience. I have more then 10 years of experience. Development and tuning.

$4500 USD in 60 dias
(0 Comentários)

Hi I am a power electronics engineer. I have developed similar product. I can provide working prototype and finish product. Input voltage: 20~30Vdc Output voltage:10~36Vdc Current:0-20A Display mode: LCD

$2200 USD in 30 dias
(0 Comentários)

Hi Iam a Post graduate in power electronics and having good industrial experience in product design and development. I can help you to finish the work.

$2500 USD in 30 dias
(0 Comentários)

I have 10 year of professional experience in PCB designing, Hardware development (digital & analogue circuit designing ) & microcontroller base firmware development. I am proficient expert with similar projects, I ca Mais

$2500 USD in 30 dias
(0 Comentários)

I have 30 years in electronics and the owner of WDG. We are a well established design center offering you expertise and experience outsourcing design services since 1996. With this project we delivery : schematic Mais

$3500 USD in 90 dias
(0 Comentários)

本工作室专门承接各种高难度的项目,本工作室有资深电路研发工程师,熟悉模拟电路,数字电路,嵌入式系统设计,贵司的需求我们仔细看过,没有太大问题,完全可以实现,方便的话可QQ联系:178061860, 电话:13336103902

$5555 USD in 90 dias
(0 Comentários)

HI, I am an electronic design with many years experiences in one of the main companies in italy in the electronic field. I read your requirements, and I am sure to give you a very very good project. Thank you in Mais

$4444 USD in 15 dias
(0 Comentários)

Dear yoyochen1987, I am Jaiju Varghese working on Embedded Domain with 5+ years of experience. I had a previous experience on a Medical Test equipment(something like a heater for Dental clinic), which requires curr Mais

$1500 USD in 30 dias
(0 Comentários)