S3L inverter

from Wikipedia, the free encyclopedia

The S3L inverter (abbreviation for English Soft Switching Three Level inverter ) is a power electronic inverters with a high efficiency for use in particular in phase drives , as feed-in inverter in photovoltaic - or wind turbines and power supplies. The circuit concept was developed in 2009 at the HTWG Konstanz .

functionality

Basic circuit diagram of the S3L inverter. The relief network is highlighted in gray.

Inverters are used to convert direct voltage into alternating voltage . Mostly they are constructed using power transistors and diodes . These are operated as electronic switches. In the usual design with "hard" switching operations, switching losses occur, which reduce the efficiency , especially at high switching frequency values . To improve this, the so-called three-level inverter is often used for inverters with a higher output (from approx. 10 kW) .

The S3L inverter is based on such a hard-switching 3-stage inverter in T-type design. A relief network consisting of a few passive components is added to this. It prevents high values ​​of voltage and current and thus high values ​​of power loss from occurring at the same time during the switching processes. This means that all switching processes are "smooth". Switching losses are thus largely avoided. Since the relief network also works without any losses inherent in the principle, the efficiency of the inverter shows good values ​​even with high values ​​of the switching frequency.

A variant of the S3L inverter is called SS3L inverter (abbreviation for Super Soft Switching Three Level Inverter). It is characterized by particularly favorable properties in terms of electromagnetic compatibility (EMC). This is achieved in a simple manner in that the activation processes of the power transistors are slowed down by their activation. The high efficiency and the other properties of the S3L inverter version are not affected.

The S3L inverter is protected by patent.

swell

  1. ↑ Peter RW Martin (Ed.): Application manual IGBT and MOSFET power modules . ISLE Verlag, 1998, ISBN 3-932633-24-5 , section 1.2.3 Qualitative switching behavior of MOSFET and IGBT during hard switching ( PDF version ).
  2. ↑ Akira Nabae, Isao Takahashi, Hirofumi Akagi: A New Neutral-Point-Clamped PWM Inverter . In: IEEE Transactions on Industry Applications . IA-17, no. 5 , September 1981, pp. 518-523 , doi : 10.1109 / TIA.1981.4503992 .
  3. ↑ M. Schweizer, JW Kolar: High efficiency drive system with 3-level T-type inverter . In: Proceedings of the 2011-14th European Conference on Power Electronics and Applications (EPE 2011) . 2011, ISBN 978-90-75815-15-3 , pp. 1-10 .
  4. ↑ MW Gekeler: Soft switching three level inverter with passive snubber circuit (S3L inverter) . In: Proceedings of the 2011-14th European Conference on Power Electronics and Applications (EPE 2011) . 2011, ISBN 978-90-75815-15-3 , pp. 1-10 .
  5. ↑ MW Gekeler: Soft-switching 3-stage pulse inverter with loss-free relief network . In: International ETG Congress 2011 (ETG Technical Report 130 Part B) . 2011, ISBN 978-3-8007-3376-7 , pp. 264-270 .
  6. ↑ Manfred W. Gekeler; Stefan Schreitmüller; Gunter Voigt: Comparison of the EMC and efficiency characteristics of hard and soft switching three-level inverters . In: PCIM Europe 2016 Conference (International Exhibition and Conference for Power Electronics, Intelligent Motion and Power Quality), 10. -12. May 2016 . Nuremberg 2016, ISBN 978-3-8007-4186-1 , p. 136-143 .
  7. ↑ Manfred W. Gekeler: EMC and efficiency comparison of hard and soft switching 3-stage pulse inverters . In: emv International Trade Fair and Congress for Electromagnetic Compatibility, Düsseldorf, February 23-25, 2016 . Apprimus Verlag, Aachen 2016, ISBN 978-3-86359-396-4 , p. 214-227 .
  8. ↑ Manfred W. Gekeler: Soft Switching Three Level Inverter (S3L Inverter) . In: Proceedings of the European Conference of Power Electronics and Applications (EPE 2013) . 2013, ISBN 978-90-75815-17-7 .
  9. ↑ Manfred W. Gekeler: 一种 达到 最高 效率 的 新型 软 切换 三 电 平 逆变 器 拓扑 结构 A Novel Topology of Soft Switching Three-level Inverters for Highest Efficiency Rates . In: Proceedings of the Chinese Society for Electrical Engineering (PCSEE) . tape 33 , no. 21 , July 2013, p. 1-8 .
  10. ↑ Manfred W. Gekeler: Optimized PWM control for soft switching three level inverters (S3L inverters) . In: International VDE ETG Congress November 2013 . ISBN 978-3-8007-3550-1 .
  11. ↑ 3-stage pulse inverter with relief network . German patent DE 10 2010 008 426 B4; Registration date: February 18, 2010; Disclosure Date: August 18, 2011; Publication date of patent grant: September 1, 2011; Patent holder: Konstanz University of Applied Sciences, 78462, Konstanz, DE; Inventor: Gekeler, Manfred W., 78464, Konstanz, DE.
  12. ↑ Patent family: CA 2 789 937 C, CN 102804570 B, DE 10 2010 008 426 B4, EP 2 537 239 B1, JP 5395280 B2, KR 10-1366393 B1, US 8,462,524 B2

Web links