1, Elevator Terminal Overview:
(1) the basic parts of the terminals used for the electrical connections, it is the endpoint of the connection between the wires, electrical equipment, control panels and fixed parts of the joint.
(2) place: wire, electrical, control panels require wires or connectors to connect current, signal contacts in the control cabinet, instruments, controllers, control boards.
(3) shape: generally a continuous row of shapes also said that row of wiring, terminals, Terminal block, terminal blocks, terminal blocks.
(4) functions: ensure electrical connection electrical installation and maintenance of strong, safe, beautiful, and improve the ease and rapidity.
2, Terminal elevator applications: control panels, control systems
Control section usually refers to electrical control equipment and the necessary lines, including cabinets, excitation and control layer and so on.
3, elevator system control technology:
Drive and control system of elevator elevator drive control system has come from simple to complex processes. Elevator drive system are as follows: single-, double-speed AC motor drive system, stator variable voltage speed control system of AC motor, DC SCR excitation system of generator motor, SCR power drag system, VVVF variable voltage adjustable speed drive system.
Elevator control system from the car dashboard, door signs, PLC, inverter, variable speed systems, inverter only speed, and part is done by the PLC logic control. PLC is responsible for logic signals, which sent starting and stopping signals to the converter and inverter itself for operation to the PLC to form a two-way contact between. Systems are equipped with rotary encoder motor coaxial connection and the PG card, completed speed detection and feedback to form a closed-loop speed and position loop. In addition system braking resistor must be configured, and when the elevator speed runs, motor in a State of renewable power, feedback to inverter power, inhibit the DC voltage increases.
Elevator system is a six layer six station of system, Wells road within has car van, and security window, and on heavy, and security clamp, and induction device, and flat layer, and floors across magnetic Board, and end station playing Board and the various action switch, car van bottom has overload, and full switch, Wells road outside each layer has floors displayed, and call ladder button and the indicates, and a layer set base station electric lock, shaft top Department has room, internal room overhaul button, and slow Shang, and slow Xia switch, and tractor, and oriented round and limited speed device, and road bottom has late pit, buffer, and limited speed device rope round; car van internal has Office door, and Car door, and door machine institutions, and door knife institutions, and locks institutions, and door machine powered circuit, and security touch Board, and car top urgent stopped, and overhaul, and slow Shang, and slow Xia switch and the car top lighting, and car top wiring van, car door and office door above has floors displayed, car door right has within selected button and the indicates, and opened closed button, and alarm button, and overload, and full indicates. The focus of this paper is to set out the original relay control in control cabinet is reformed, elevator control by PLC instead of relay, to improve elevator's reliability and safety; and sent via DDC signal acquisition of the elevator station elevators operation monitoring.
DC lift has the speed, comfort, and high leveling accuracy characteristics, this is because the DC motor drive system speed performance, wider speed range. DC motor speed control method of voltage UA has changed, an adjustment resistor Rtj, changing the excitation.