A unique electric transmission concept, consisting of two traction motors in tandem, for use in automotive vehicles is described. The device does away with the requirement of intermittent current supply at low speeds, and is shown to be superior to conventional electric motor drives with regard to efficiency, flexibility of torque-speed requirements, control, and adaptability to regenerative braking. The electric motor-transmission can operate in either the differential, single-motor, or additive mode, producing both forward and reverse speeds while covering the entire spectrum of torque, speed, and power required by an automotive vehicle. A detailed study of a 7.5 kW model was performed, providing performance data, current drain, output, efficiencies, and other relevant system characteristics. Based on this data, a preliminary design is formulated including estimates of size, weight, and cost. A catalog of specifications for power ratings ranging from 3.7 kW to 15 kW is included, so that the automotive designer may select a unit most appropriate to his vehicle. Recommendations are made for advancing the technology of high-speed dc machinery and a development program for the construction and testing of an appropriate motor-transmission prototype for demonstration purposes. (ERA citation 03:037606)

  • Corporate Authors:

    Mechanical Technology, Incorporated

    968 Albany-Shaker Road
    Latham, NY  United States  12110

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  United States  20585
  • Authors:
    • Marcus, A
    • Pinkus, O
  • Publication Date: 1977-9

Media Info

  • Pagination: EBIV

Subject/Index Terms

Filing Info

  • Accession Number: 00185633
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: MTI-78TR2
  • Contract Numbers: EY-76-C-02-2835
  • Files: TRIS
  • Created Date: Dec 29 1978 12:00AM