Postioning apparatus for tracked transport vehicles with linear motor propulsion
AssigneeSiemens Aktiengesellshaft
InventorHerwig Guntner
Life of this patent
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Abstract
This invention concerns a positioning device for a transport vehicle, constrained to travel along a track. These transport vehicles are propelled by linear motor propulsion. Along the track are positioning points typically located at stations for entering and exiting the vehicle. Associated with the means for linear motor propulsion, stationary in the track at the positioning points are two switches, means to detect the velocity of the vehicle and a logic control circuit, so that acceleration, deceleration and zero strength excitation signals can be applied to the linear motor in the vehicle so as to cause the vehicle to come to rest at the positioning point. The apparatus controls a vehicle travelling in either direction along the track.
Claims7
Positioning apparatus for tracked transport vehicles having a primary alternating current linear motor windings and separate direct current windings located in the vehicle and stationary linear motor parts of a ferromagnetic bar within the position area having a position point therein, said bar having rows of conducting material placed in an orientation perpendicular to the track and spaced a distance from one another as the pole pitch spacing of the primary winding, comprising:
- means for sensing the position of the vehicle as it approaches the positioning point from either direction on the track within the position area;
- switching control means responsive to said position means for closing one or two switches depending on the position of the vehicle within the position area;
- means for measuring the vehicle velocity while said vehicle is within said position area;
- excitation control circuit means responsive to said velocity measurement and said switch positions for applying an accelerating, decelerating or zero strength excitation to said primary alternating current linear motor windings if either one or the other of said two switches are closed and for applying a direct current field excitation to said separate direct current windings regardless of said velocity measurement if both of said switches are closed simultaneously.
A vehicle propulsion and positioning system for tracked vehicles having a propulsion system with primary alternating current linear motor windings and separate direct current windings in said vehicles and a secondary part having a continuous homogeneous ferromagnetic bar along the entire length of the track except for multiple position areas along the track wherein the said stationary part is a ferromagnetic bar having a position point therein said bar, having rows of conducting material placed in an orientation perpendicular to the track and spaced a distance from one another as the pole pitch spacing of the alternating current primary winding comprising at each position area:
- means for sensing the position of the vehicle as it approaches the positioning point from either direction on the track within the position area;
- switching control means responsive to said position means for closing one or two switches depending on the position of the vehicle within the position area;
- means for measuring the vehicle velocity while said vehicle is within said position area;
- excitation control circuit means responsive to said velocity measurement and said switch positions for applying an accelerating, decelerating or zero strength excitation to said primary alternating current linear motor windings if either one or the other of said two switches are closed and for applying a direct current field excitation to said separate direct current windings regardless of said velocity measurement if both of said switches are closed simultaneously.
Dependencies are inferred from the claim text.