1KVA Single phase pure Sine Wave Inverter


I am in need of a single phase pure sine wave inverter, working prototype model whose specificaion is mentioned below.


Input Voltage: 30V to 40V DC

Output Voltage: Pure Sine Wave, 220V AC, 50 HZ

Output Power: 1KVA

Efficiency: above 90%

Output Voltage Tolerance: +/- 5%

Phase: Single

Inverter Mode: Offline, Switch mode design (PWM switching)

Inverter Switching time after power failure: ~ 10ms

Battery Charger: Inbuilt, switch mode design

Laptop/PC Interface: RS232 or USB (For future upgradation of firmware in the customer premises itself)

Addtional feature: Its preferred that this inverter can be used in the future for power generation with Solar Panel. So in future if the customer needs a solar power inverter, then he must not buy a new inverter. They can use this inverter for that purpose also.

For the above specifications, I need the hardware design and its associated software. Expect the design to be done using any ARM/PIC Microcontroller. Its preferred if you can use a 32 bit ARM µC. Use PWM switching concept. The switching frequency can be from 60 KHz and up to 100 KHz.

Its default that the design must not use a bulky transformer in any stages of the design. Particularly at the output stage, don't use a bulkier transformer. Use of high frequency switching transformer is recommended where ever necessary.

It must be kept in mind that, the deisgn must have low EMI (switching design may generate EMI, use appropriate filtering), so that it can pass EMC tests successfully at a later stage.


1. Full hardware circuit schematics with bill of materials (Orcad Capture Schematics)

2. PCB Layout with Gerber (Orcad/Cadence Allegro PCB)

3. Fully assembled working, prototype with test results

4. Board firmware and any possible utility to download the firmware for upgradation

Happy bidding.



Skills: Electronics, Embedded Software, Microcontroller, PCB Layout

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About the Employer:
( 0 reviews ) Namakkal, India

Project ID: #1290739

10 freelancers are bidding on average $1671 for this job


Hi old engineers with big expetic

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$2000 USD in 25 days
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Hello, I have 10 years R&D design experience of UPS, Power Inverter and Battery Charger, I can help you with your project. Please see PM for more details.

$1000 USD in 30 days
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We have 30 years of experience in electronic system design and development involving hardware, firmware, software, production and manufacturing support.

$2000 USD in 30 days
(1 Review)

I can do this for you with low cost. I am from coimbatore tamilnadu. I am working in spectrum embedded solutions coimbatore.

$250 USD in 14 days
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We are have about 12 years of industrial experience with inverters, specialized motor controls, dc-dc supplies, Solar inveters using Infineon, Microchip, ST microcontrollers, Actel FPGA, Xilinx FPGA etc., We will get t More

$750 USD in 30 days
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Let's get Started!

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I have wide experience in microcontroller based projects. Among them are voice controlled robot, Gas sensors, Sms based projects etc. I plan to develop a custom board for this project rather than rely on the off the sh More

$710 USD in 25 days
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I have three years of Experience in UPS R & D in well known company... and doing still same job.. so have wide experience in this field... so refer me for this...

$3000 USD in 90 days
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HI, I worked for about 25 years for main italian defence companies. I work normally with ARM tech, for an application like this the NXP ARM could be a good solution (LPC2368/78). I could give you a very experienced More

$2500 USD in 30 days
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