Download presentation

Presentation is loading. Please wait.

1
**INVERTERS: The Investigation to the**

* INVERTERS: The Investigation to the 07/16/96 optimal topology to the designing of a sinewave inverter range for the use in static as well as mobile applications Presenter: Dr Gawie van der Merwe *

2
* Background 07/16/96 PV and Mobile Inverters with a sinewave output is the optimal requirement. Various Topologies exist. Investigations done in order to search for the optimal topology. Investigation towards: Efficiency Cost Reliability Manufacture (Complexity/Simplicity) *

3
**Sinewave Inverter Topologies**

* Sinewave Inverter Topologies 07/16/96 CVT (Constant Voltage Transformer) 50Hz Transformer Push Pull Primary- Full Bridge switching in Primary with series line Inductor High Frequency Isolation Transformer and Secondary H-Bridge Control Series or Parallel Transformer switching *

4
**A) Constant Voltage Transformer**

* A) Constant Voltage Transformer 07/16/96 (Ferro Resonant Transformer) *

5
**B) 50Hz - Transformer Topology**

* B) 50Hz - Transformer Topology 07/16/96 Various “50Hz” transformer topologies exist Push-pull - Inductor in primary Push-pull - Inductor in secondary Full Bridge Inductor in primary *

6
* 07/16/96 *

7
* Topology B1 07/16/96 Push-pull - Inductor in primary *

8
**Push-pull - Inductor in primary**

* Topology B1 07/16/96 Push-pull - Inductor in primary Advantages Simple manufacture & design Mosfet drive circuit referred to ground Disadvantages Voltage overshoot over devices - leads to voltage rating increase - Reduction in efficiency No-, or limited control over free running inductor current “Skewing” of transformer often occur. *

9
**Topology B2 Push-pull - Inductor in secondary**

* Topology B2 07/16/96 Push-pull - Inductor in secondary Primary side Push-pull, series inductor in secondary *

10
**Push-pull - Inductor in secondary**

* Topology B2 07/16/96 Push-pull - Inductor in secondary Advantages Simple manufacture & design Mosfet drive circuit referred to ground Disadvantages Voltage overshoot over devices - leads to voltage rating increase - Reduction in efficiency No-, or limited control over free running inductor current “Skewing” of transformer often occur. *

11
**Topology B3 Full Bridge Inductor in primary Most popular used topology**

* Topology B3 07/16/96 Full Bridge Inductor in primary Most popular used topology *

12
**Full Bridge Inductor in primary**

* Topology B3 07/16/96 Full Bridge Inductor in primary Advantages Complete control over primary side inductor current Uni-as well as bi-polar pwm control strategy possible Simple manufacturing Disadvantages System design is more complex Inverter efficiency is load dependent *

13
**C) High Frequency Isolation**

* C) High Frequency Isolation 07/16/96 *

14
* 07/16/96 C) High Frequency Isolation Transformer with full H-bridge Control on Secondary High frequency isolation reduce physical size Direct output control leads to better output waveform control and reduced distortion *

15
* 07/16/96 *

16
**High Frequency Isolation Transformer**

* High Frequency Isolation Transformer 07/16/96 Advantages Units generally more mobile Possible to limit battery current drawn to a “smooth DC” Good efficiency with a non linear load Disadvantages Design is complex Manufacture is complex High cost *

17
**D) Transformer - series and/or parallel switching**

* D) Transformer - series and/or parallel switching 07/16/96 A wide range of topologies exist A combination of various Transformer switching topologies Transformer secondary is in series Separate output voltage & frequency for each transformer *

18
**Transformer-series and/or parallel switching**

* Transformer-series and/or parallel switching 07/16/96 *

19
* 07/16/96 *

20
**Transformer -series and/or parallel switching**

* Transformer -series and/or parallel switching 07/16/96 Advantages High running to overload ratio is Very popular design Advantages for motor startup High efficiency Disadvantages Control complex Manufacturing is complex Inverter is big and bulky *

21
**Summary Matrix transformer topology**

* Summary 07/16/96 Different topologies have advantages for different applications Both topology A, B1&B2, (50Hz topology) are outdated High frequency option, has mobility & weight advantage Output distortion under all conditions low Matrix transformer topology Physical dimensions restrains mobility Ideal for short period overload power peak/Mass ratio is good *

22
**Estimated Inverter Manufacturing Costs (Same Input Power Stage)**

* Estimated Inverter Manufacturing Costs (Same Input Power Stage) 07/16/96 Input power stage same for comparing Calculation done on continues rating without forced air cooling Cost calculated on discreet units *

23
**Non linear load as a % of total power consumption**

* 07/16/96 Non linear load as a % of total power consumption Non linear loads - high percentage on power application below 1Kva typical loads, computer, fluorescent lights, video Higher power application, more resistive, i.e. Microwave, Hairdryer etc. < 1Kva most sensitive to PV applications *

24
* 07/16/96 *

25
**Topology Suggestions for Power Levels**

* Topology Suggestions for Power Levels 07/16/96 Power Rating High Frequency Full Bridge 50Hz Matrix Config. W Mobile (most cost efficient) 50% Advantage on perm installation 60% Too expensive 10% 400W-1500W Mobile General 70% PV-Permanent 100% 40% 1000W-2,5Kw PV-Permanent 70% PV & Mobile Stackable units in parallel 70% PV Permanent Best choice 80% 2Kw-5Kw Stackable parallel combination 100% Stackable Units 80% Mobile 30% (Percentage indicates topology choice for the application) *

Similar presentations

Presentation is loading. Please wait....

OK

SEPTEMBER 25, 2008 Power Melder Midterm Presentation.

SEPTEMBER 25, 2008 Power Melder Midterm Presentation.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on cloud computing pdf Ppt on meeting skills for leaders Ppt on file system in unix you combine Ppt on causes of land pollution Ppt on right to education act 2009 Ppt on new zealand culture and family tradition Ppt on opposites in hindi Ppt on trade fair international Ppt on arunachal pradesh culture Ppt on modern science and technology