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TIDA-020030: My requirement is 27KW 3 phase Inverter! Can i use this?

Vijay Gohil12
Intellectual 455 points
Part Number: TIDA-020030
Other Parts Discussed in Thread: UCC21540, TIDA-01604

Dear TI Team,

  I have a requirement for 3Phase inverter 27KW! for which I was planning to use your reference design TIDA-020030 connecting 3 of them 1 for each phase.

My technical requirement is as below:

Sr No. Parameter Specification
1 Rated output 25 kW at 0.8 PF lagging
2 Load 25kW load comprises of 5.5kW and 2.2kW motor load respectively. Both the inductive loads are connected to inverter through individual Soft Starters. When the motor loads are not running, Inverter is supposed to run on 25kW load with continuous duty. Also, Inverter should be designed to withstand sudden loading from 0-100%.
3 Input supply (DC) 20V to 50V. Functional range should be from 24-33V DC, whereas it should be able to withstand upto 50V and enable disconnection incase voltage rises above 33V.
4 Output supply (AC) 415V, 50HZ, 3PH. Tolerances: Voltage : ± 1.5% Frequency : ± 2%
5 Efficiency >90%
6 Over load rating 110% for 30 minutes
7 Duty Continuous. Frequent motor operations are envisaged.
8 Harmonics Overall : less than 5% Individual : 3% Input ripple : <3%

So what changes do i need to do? Do you suggest to use DC DC converter to boost the I/P voltage. If so could you suggest me any TI reference design for the same? Deeply awaiting your reply and thanks in advance.

Regards,

  Vijay Gohil

  • 0
    TI__Mastermind 18120 points

    Hi Vijay,

    Do you mean the DC bus voltage for the inverter is 20V-50V only, and the inverter output is 415V? 

  • 0 in reply to Xun
    Intellectual 455 points

    Dear Sir,

      Yes actually i think it is connected to some solar panel array due to which there is wide range of I/P but as per their specification operational voltage is 20-33VDC only and O/p load is 3 phase motors 415VAC.

    Best Regards,

      Vijay Gohil

  • 0 in reply to Vijay Gohil12
    TI__Mastermind 18120 points

    Hi Vijay,

    What is the Maximum output voltages? The design can be used for either HV or LV Bus input, the driver has 10A drive capability. But I don't think the inverter AC output peak voltage can be larger than DC bus voltage.

  • 0 in reply to Xun
    Intellectual 455 points

    Dear Xun,

      Of course I will need to boost voltage first from 24VDC to around 450VDC or so to get 415V AC as output.

      I was planning to make the design in 2 stages: One DC-DC boost and Second DC-AC using TIDA020030.

      i was planning to use 3 TIDA020030 cards half bridge to generate 3 phase 415V AC using a single microcontroller to fire all simultaneously to get 3 phase. Just wanted to be sure form you guys if i can use it this way! (see Block Diagram)

  • 0 in reply to Vijay Gohil12
    TI__Mastermind 18120 points

    Hi Vijay,

    Thanks for the clarification. Yes, this is a suitable case for TIDA-020030. The IGBT module that is used in this design is too big, you might want to choose a smaller IGBT module. For Boost converter you may want to use dual ch iso driver such as UCC21540.

  • 0 in reply to Xun
    Intellectual 455 points

    Dear Xun,

      Thank you for your quick reply. I know TIDA-020030 would be too big for DC to AC but ideal working temperature of environment in my application country is around 45-50°C. So i dont mind using big module just being on safest side and also cost is no barrier for this project.

      Could you share me some reference design to get DC DC boost(any TIDA cards)? 

    Best Regards,

      Vijay Gohil

  • 0 in reply to Vijay Gohil12
    TI__Mastermind 18120 points

    Hi Vijay,

    I don't think I have seen a Boost Converter TIDA of ~25kW but you could refer to TIDA-01604.

    It is a 6.6kW TTPL PFC using C2000 MCU. The structure is similar to a Boost. Just remove the LF switches. You would need multiple phases  to achieve such power rating. One C2000 can be used to control both Boost and the inverter.