Linear synchronous motor with phase control
First Claim
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1. A system for controlling movements of a vehicle along a land-based guideway which comprises:
- a linear array of targets mounted on the vehicle, wherein the array has a length (l), with a predetermined distance (d) between adjacent targets, wherein the targets of the array are aligned in the direction of vehicle movement;
a plurality of stationary, in-line, wayside sensors placed along the guideway with a spacing (s) between adjacent sensors;
a signal processor electronically connected to each sensor to receive a signal therefrom, wherein the signal is indicative of a target being within a predetermined range (r) from a sensor;
a computer means connected with the signal processor for measuring a time interval (Δ
t) between successive signals to derive parametric values, based on (Δ
t) and (d);
a propulsion unit, wherein operation of the propulsion unit is characterized by a motor phase angle; and
a controller connected to the computer for receiving the parametric values therefrom, wherein the controller controls the motor phase angle of the propulsion unit, based on the parametric values received from the computer, to control the propulsion of the vehicle.
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Abstract
A system for controlling movements of a vehicle along a guideway includes an array of targets that are mounted on the vehicle, and a series of wayside sensors that are mounted on the guideway. A signal processor monitors the passage of targets past appropriate sensors and uses resultant signals to derive parametric values that are characteristic of the vehicle'"'"'s movements. The parametric values are then coordinated with a controller for the operation of a linear synchronous motor that propels the vehicle.
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Citations
17 Claims
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1. A system for controlling movements of a vehicle along a land-based guideway which comprises:
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a linear array of targets mounted on the vehicle, wherein the array has a length (l), with a predetermined distance (d) between adjacent targets, wherein the targets of the array are aligned in the direction of vehicle movement; a plurality of stationary, in-line, wayside sensors placed along the guideway with a spacing (s) between adjacent sensors; a signal processor electronically connected to each sensor to receive a signal therefrom, wherein the signal is indicative of a target being within a predetermined range (r) from a sensor; a computer means connected with the signal processor for measuring a time interval (Δ
t) between successive signals to derive parametric values, based on (Δ
t) and (d);a propulsion unit, wherein operation of the propulsion unit is characterized by a motor phase angle; and a controller connected to the computer for receiving the parametric values therefrom, wherein the controller controls the motor phase angle of the propulsion unit, based on the parametric values received from the computer, to control the propulsion of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for controlling movements of a vehicle along a land-based guideway which comprises:
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a plurality of stationary wayside sensors placed along the guideway for detecting passage of the vehicle past a predetermined sensor, and for generating at least two signals in response thereto, wherein each signal indicates passage of a respective target on the vehicle, and wherein there is a predetermined distance (d) in the direction of vehicle movement between targets on the vehicle; a signal processor for receiving the signals from the predetermined sensor to derive parametric values characteristic of the movement of the vehicle; a computer means connected with the signal processor for measuring a time interval (Δ
t) between successive signals to derive parametric values, based on (Δ
t) and (d);a propulsion unit, wherein operation of the propulsion unit is characterized by a motor phase angle; and a controller connected to the computer means for receiving the parametric values therefrom, wherein the controller controls the motor phase angle of the propulsion unit, based on the parametric values received from the computer means, to control movement of the vehicle. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification