Controller of rail transportation safety door

Abstract

The invention relates to a controller of a rail transportation safety door, wherein the output ends of PWMA and PWMB of CPU of a central controller used for regulating input of signals are connected with the input end of a DC / AC converter; the three phases of a direct current brushless electric machine A are respectively connected with three groups of transistors of the DC / AC converter; the output ends of the direct current brushless electric machine A are respectively connected with the rail transportation safety door and a position sensor A and a position sensor B; the input and output signals of the rail transportation safety door are connected with the input end of the central controller; a platform manual operation device is connected with the input end of the central controller; theexternal power input provides direct current power supply for the controller through the AC / DC converter; and a communication unit is connected with the central controller. The output power in the invention has convenient regulation, can ensure accurate starting and positioning of two rail transportation safety doors; the opening and closing of the rail transportation safety door are easy to control; and the rail transportation safety door has small size and beautiful and solid appearance.

Description

technical field [0001] The invention belongs to the field of automation control, in particular to a controller for a rail transit safety door. Background technique [0002] At present, the composition of the rail traffic safety door for controlling rail traffic mainly includes: a rail traffic safety door composed of a brushless DC motor, a controller, a speed change mechanism, and a sensor; a single-phase AC servo motor, two controllers, two speed change mechanisms, and a sensor Rail traffic safety doors composed of three-phase AC motors or three-phase variable frequency motors, controllers, deceleration mechanisms, sensors, etc.; and single-phase or three-phase series electromagnetic brakes developed in recent years Rail traffic safety doors composed of motors, controllers, speed change mechanisms, sensors, etc.; the method of controlling the rail traffic safety door switches of these rail traffics has certain shortcomings in the use process: 1. With brushed DC motors and c...

AI Technical Summary

Problems solved by technology

[0002] At present, the composition of the rail traffic safety door for controlling rail traffic mainly includes: a rail traffic safety door composed of a brushless DC motor, a controller, a speed change mechanism, and a sensor; a single-phase AC servo motor, two controllers, two speed change mechanisms, and a sensor Rail traffic safety doors composed of three-phase AC motors or three-phase variable frequency motors, controllers, deceleration mechanisms, sensors, etc.; and single-phase or three-phase series electromagnetic brakes developed in recent years Rail traffic safety doors composed of motors, controllers, speed change mechanisms, sensors, etc.; the method of controlling the rail traffic safety door switches of these rail traffics has certain shortcomings in the use process: 1. With brushed DC motors and controls, due to commutator For reasons such as commutation sparks, the contact resistance of the brush and commutator is very large, the overall resistance of the motor is large, it is easy to generate heat, the maintenance cost is high, and the reliability is low, so it cannot be used for the control of rail transit safety doors; 2. Use two controls 3. Although the rail traffic safety door composed of three-phase AC motor, controller, sensor, etc. has the advantages of small starting torque and large starting current, it has the advantages of small starting torque and large starting current. The system efficiency is low when running at low speed, which cannot meet the flexible start and close of rail transit safety doors, especially the flexible start and close of two rail transit safety doors at the same time; 4. Use single-phase or three-phase series-connected electromagnetic brake motors Its volume is large, so it is not suitable for installation in the narrow space of the safety door body of rail transit

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