THE DESIGN OF THE HEAT SINKING IN HV-VFD

Abstract

In this paper, the design of the heat sinking in the 6kV /2500kW variable frequency drive system is studied. Forced air cooling technology is applied in the drive system. Based on the calculation of power losses, the heat sinks are designed according to the relation between power losses and temperature rise. Then, the scheme of air conduit is presented, which include: front air intake, sealed wind cavity and back air outtake. The heat sink is joined into the close wind cavity separately. The experiment results show that the heat sinking is satisfied.

Keywords

• HV-VFD, heat sinking, forced air cooling

References

1. FEI Wan-min, YAO Wen-xi, LU Zheng-yu, et al, “Development of Medium-high Voltage Variable Frequency Motor Drive Technology”, Power Electronics, Vol:36, No:2, pp74-78, 2002.
2. LIU Wen-hua, SONG Qiang, YAN Gan-gui, et al, “Medium Voltage Drive with NPC Threelevel Inverter Using IGCTs”, Automation of Electric Power System, Vol:26 No:20, pp61-65, 2002.
3. WANG Dan, MAO Chengxiong, LU Jiming, et al, “Design of Snubber for Series IGCTs Used in High Power and Medium Voltage Converter”, 38th International Universities Power Engineering Conference (UPEC), Thessaloniki Greece, September 2003. pp157-160.
4. HAN An-rong, General Variable Frequency Drive and Its Application, China Machine Press, 2002.