Passenger transportation system and relative control method
A passenger transportation system having at least one rail extending along a path; at least one trolley movable along the rail; an actuating device having a linear electric motor, in turn having at least one slide fitted to the trolley, and a linear stator extending at least partly along the path, and having an elongated body, and a quantity of power windings embedded in the elongated body; and a quantity of sensors configured to control the position of the trolley, the sensors being fitted to the elongated body and so positioned as to minimize noise generated by the power windings on the sensors.
1. A method of controlling a transportation system including an actuating device having a linear electric motor including at least one slide and a linear stator extending at least partly along a path, said linear stator including at least one power winding and at least one control winding and the at least one slide and the linear stator being magnetically coupled to induce movement of the at least one slide along the path, said method comprising:
utilizing the at least one control winding to detect a transit signal;
determining at least one of: a position of the at least one slide and a speed of the at least one slide as a function of the detected transit signal; and
locating the control winding between a first magnetic field generated by the at least one power winding such that a total magnetic flux produced by the at least one power winding and linked to the at least one control winding is nil.
2. The method of claim 1 , which includes powering the at least one power winding as a function of the detected transit signal.
3. The method of claim 1 , which includes:
utilizing a reference winding to detect any noise, said reference winding located such that the first magnetic field generated by the at least one power winding does not link with the reference winding, and
processing the detected transit signal based on any detected noise.
4. The method of claim 1 , which includes controlling the linear electric motor based on at least one of: the position of the at least one slide and the speed of the at least one slide.
5. The method of claim 1 , wherein the linear electric motor includes three control windings, each associated with a phase and configured to supply a respective one of a plurality of transit signals and which includes:
processing the transit signals to define a quadrature signal representing a quadrature component of the transit signals in a movable-coordinate system, and
defining the speed of the at least one slide based on the quadrature signal of the transit signals.
6. The method of claim 1 , which includes detecting a voltage of at least one terminal of the at least one control winding in response to varying magnetic flux produced by passage of the at least one slide with the at least one control winding.