How to design the automatic retractable door
3.10 Motor Works motor is to convert electrical energy into mechanical energy equipment. In machinery, metallurgy, petroleum, coal, chemical, aviation, transportation, agriculture, and various other industries, the motor has been widely used with. With the continuous improvement of the degree of industrial automation, motor control requires the use of a wide variety of automation systems as components, satellite automatic control system, the motor is also indispensable. Also in defense, culture, education, health care and daily life (modern appliances industry) motors are also increasingly widely used up.
General Motors is mainly composed of two parts: a fixed part called the stator, the rotating part called the rotor. Another cover, fan, casing, frame, junction boxes.
Motor Works is based on the law of electromagnetic induction, all-electric Ohm's law, and the law of electromagnetic force and other foundations. When the pole is rotated clockwise, the magnetic poles of the magnetic field lines cutting rotor bars, the guide bar on the induced electromotive force. Direction of the force is determined by the right-hand rule. Because the movement is relative, if the magnetic pole does not move, rotor bar rotated counterclockwise, the guide bar can also be induced electromotive force. In the role of electromotive force, the closed guide bar current is generated. The current interaction with the rotating magnetic field, the rotor bars by electromagnetic force (Ampere force), the direction of the electromagnetic force can be used to determine the left-hand rule. By the electromagnetic force and produce the electromagnetic torque, the rotor will turn up.
In this design the electric motor is used to drive electric retractable doors opening and closing, the completion of electric retractable door control.
Structure and working principle
Composed of electric retractable door: electric retractable door consists of the door, the driver, the control system structure. Door made of stainless steel and aluminum special profiles, using the principle articulated parallelogram, telescopic flexible large travel. Drive using special motor, worm gear reducer, and no manual clutch, power outage you can manually open and close, the control system control panel, buttons, switches, and the other can be equipped with a wireless remote control device according to user needs. Can be equipped with scroll display, it displays the contents of 500 words. It can also be equipped with intelligent infrared dual-head anti-collision device, in case people or objects 20-30CM can automatically return to run, in order to protect the safety of vehicles and pedestrians. Below Zhengzhou Saida example to describe the performance of electric retractable door electric retractable door:
3.12 circuit principle
80C51 microcontroller core circuit is, with 4KB of internal FlashROM, no need to extend the program memory; the computer is not a lot of computation and temporary data, existing 128B-chip RAM has been able to meet the requirements, do not have to expand chip RAM, the system equipped with four LED display and two single interface to keyboard, using P0 interface external 8-inverting tri-state buffer segment code 74LS244 for LED dynamic scanning control drive signal P1 interface with an external piece set P1.0-P1.3 74LS07 open collector inverter gate as four LED driving port bit selection signal, LED common cathode terminal connected to the output terminal 74LS07; the key interface from P2.0, P2.1 done simultaneously receive digital signals. P3 accept D / A converter to convert the signal into an analog signal MCU processing power through the motor will turn into mechanical energy to drive the electric retractable door complete switch.