DRIVE FOR RAILROAD VEHICLES OF MUNICIPAL MASS TRANSPORTATION WITH INDUCTION MOTORS

POHON KOLJOVYCH VOZIDEL MESTSKE HROMADNE DOPRAVY S ASYNCHRONNIMI MOTORY

The traction properties of an induction motor fed by a variable frequency from a thyristor converter are considered. The properties of the induction motor are derived from its impedance diagram reduced to a frequency of 1 cps. This measure eliminates the feeding frequency and the variable feeding voltage from the description of the properties of the motor. The method permits a simple derivation of the principal traction properties of the machine: the moment of the machine is proportional to the square of its current. The coefficient of proportionality between the square of the current and the moment depends on the rotor frequency, the parameters of the machine, and is independent of the feeding frequency and the voltage. The principles for an optimum control of the motor are derived. As a converter of frequency and output voltage, an inverter of voltage attached directly to the dc source is employed permitting both motor and generator operation. At lower output frequencies, the inverter is controlled by pulse-width-modulation; at higher frequencies by the method of rectangular control. Both methods are uniformly described by means of the three-dimensional Park vector, which permits a comparison and explains the physical principle of the control of the inverter.

  • Corporate Authors:

    Statni Nakladatelstvi Technicke Literatury

    Spalena 51
    113 02 Prague 1, ZZ Czechoslovakia   
  • Authors:
    • Cerovsky, Z
    • Kamenicky, J
  • Publication Date: 1977-8

Language

  • Czech

Media Info

  • Features: References;
  • Pagination: p. 463-473
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00182585
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 12 1981 12:00AM