Technical Reports

Power Transfer to High Speed Vehicles

  • 01
  • Jul
  • 1992
AUTHOR: David Cope, Paul Chambers
SUBJECT: Evaluation
KEYWORDS: Hotel Power, Drive Power, Contact and Non-Contact Means, Inductive Coils
ABSTRACT: This final report summarizes work performed in the assessment and analysis of power transfer techniques to high speed vehicles. The objectives of this research were to determine the optimum power transfer technique for two power levels at high speed and to prepare a preliminary design of the optimum power transfer technique. The power levels are "hotelā€ power (P - 100 kW) and drive power (P - 40 MW). This investigation was restricted to power transfer techniques of contact (brush) and non-contact (inductive) types. It is recommended that power be transferred by air-core transformer action between the stationary guideway and the moving vehicle across the full air gap. The direct current power is inverted locally by semiconductor switches operating at 1 kHz. Power factor correction is performed by a capacitor on-board the vehicle. According to a design example, approximately 1 MW can be transferred per coil across the full air gap (100 mm) per meter of vehicle sidewall. Therefore, 40 MW can be transferred by coils on both sides of a 20 m vehicle. The major advantage of this technique is non-contact high power transfer independent of vehicle speed. The overall economics of this technique are competitive with other systems. Moreover, this concept provides performance no other concept can provide at any price