Research on an Entire Ventilation System and Internal Fan Optimization Design of a Compact High-voltage Induction Motor

摘要

Mixed ventilation systems are used for compact high voltage motors. Fluid flow in these motors is asymmetric, making the distribution of fluids inside motors difficult to ascertain. We used a YJKK500-4 2500kW compact high voltage motor to analyze a typical motor's fluid field and calculate the fan performance of its ventilation system. In order to improve the cooling effect of the compact high-voltage induction motor, a fan with half-radial direction blades was adopted to improve the motor's internal fan. This paper proposes a fan having half-radial direction blades, the calculated results of which are consistent with actual operating conditions and proving the feasibility of the whole-fluid model. Calculated results show that fluid flow at the rated points of the improved fan is larger than for the original fan, and the cooling effect is also enhanced.