Design of switch-mode converter for battery emulator power supply
Saukkosaari, Teemu (2024-04-16)
T. Saukkosaari
16.04.2024
© 2024, Teemu Saukkosaari. Tämä Kohde on tekijänoikeuden ja/tai lähioikeuksien suojaama. Voit käyttää Kohdetta käyttöösi sovellettavan tekijänoikeutta ja lähioikeuksia koskevan lainsäädännön sallimilla tavoilla. Muunlaista käyttöä varten tarvitset oikeudenhaltijoiden luvan.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202404162754
https://urn.fi/URN:NBN:fi:oulu-202404162754
Tiivistelmä
IPPSuM, a battery emulator power supply, has been designed for testing battery-powered devices. The power transfer of the compact power supply is achieved with a DC-DC switch-mode converter, followed by a linear regulator. The problem with this particular power supply is its relatively low output voltage and power, which limits the number ofdevices that can be tested with it. Therefore, in this thesis, the output voltage and powerranges of the DC-DC switch-mode converter were increased. This was the first necessary step to upgrade the entire power supply in the future.
The starting point of the design was to achieve all the other requirements of the old power supply. The design of the DC-DC converter started with the selection of topology, in which case the active clamp forward converter was chosen as the suitable topology. After the topology selection, the components were sized according to the constraints of the specification. Finally, this was followed by the implementation of the simulation model and typical simulations for a DC-DC converter with the Tina-Ti software.
The output voltage range of the old DC-DC converter was measured to be 5.18 V – 11.45 V, and the goal was to increase this range to 5.5 V – 21.5 V. The simulation results showed that the output voltage range was increased relatively successfully, being 5.75 V – 21.58 V after the upgrade. The designed DC-DC converter also performed well in terms of other requirements. The minimum input voltage simulation was the only exception as the output voltage failed to reach the required level. To solve this, the turns ratio of the DC-DC converter’s power transformer would have to be increased and the relevant components resized. In addition to the good simulation results, the feedback circuit was significantly simplified. This lowers the cost of the converter while allowing more circuit board space.
As stated earlier, the simulations covered only the most typical DC-DC converter simulations. More versatile and thorough simulations would be needed in order to ensure the performance of the DC-DC converter in all situations.
The starting point of the design was to achieve all the other requirements of the old power supply. The design of the DC-DC converter started with the selection of topology, in which case the active clamp forward converter was chosen as the suitable topology. After the topology selection, the components were sized according to the constraints of the specification. Finally, this was followed by the implementation of the simulation model and typical simulations for a DC-DC converter with the Tina-Ti software.
The output voltage range of the old DC-DC converter was measured to be 5.18 V – 11.45 V, and the goal was to increase this range to 5.5 V – 21.5 V. The simulation results showed that the output voltage range was increased relatively successfully, being 5.75 V – 21.58 V after the upgrade. The designed DC-DC converter also performed well in terms of other requirements. The minimum input voltage simulation was the only exception as the output voltage failed to reach the required level. To solve this, the turns ratio of the DC-DC converter’s power transformer would have to be increased and the relevant components resized. In addition to the good simulation results, the feedback circuit was significantly simplified. This lowers the cost of the converter while allowing more circuit board space.
As stated earlier, the simulations covered only the most typical DC-DC converter simulations. More versatile and thorough simulations would be needed in order to ensure the performance of the DC-DC converter in all situations.
Kokoelmat
- Avoin saatavuus [37706]