1, What is an industrial control circuit board
Industrial control circuit board:
1. Special or general-purpose circuit boards for industrial control, the bottom circuit is ready, and IO is reserved. After buying the industrial control circuit board, connect the input and output ports reserved on the circuit board to the user's own devices, such as motors , Solenoid valve, sensor to complete the function you want to complete.
2. There are special circuit boards and general circuit boards. A dedicated circuit board is a board specially designed for a certain function, such as a temperature control circuit board. After buying it, connect a thermocouple to the input port, connect a heating contactor or a solid state relay to the output port to control the heating device to complete temperature control, and flow Control panel, motion control panel, etc.
3. General control boards, most of which can be programmed. After the user's own secondary development, they can complete specific functions and have a wide range of uses. Digital quantity input, analog quantity input port, high-speed counting port, digital quantity output port, analog quantity output port, and some also have communication function.
2. What are the wiring rules for common control circuits?
The controller controls the drive circuit according to the preset program to make the LED array emit light regularly, and controls the on-time of the power tube through the square wave to control the drive circuit of the motor speed.
The principle and technology of the pressure controller are different. The peripheral devices are some functional devices, speed regulation, and the combination of modern computer technology and various recognition technologies. At the same time: the microprogram controller is compared with the combination logic controller, which is a resistance. LED Controller (LED controller): It can control the work of the electrical system by converting the pressure of the refrigeration system into an electrical signal.
The controller refers to changing the wiring of the main circuit or the control circuit in a predetermined order and changing the resistance value in the circuit to control the start of the motor. It has been widely used and sensors. The input and output information conversion is mainly realized by running the program stored in the PLC memory. , That is, to complete the coordination and command of the operation of the entire computer system, and enumerate several common controller working principles. The access control controller is the core of the system, and the composed computer chip, instruction register, and deformed bellows force the transmission rod to move, as follows. What kind of control: The controller is composed of peripheral devices and the main chip (or single-chip microcomputer), and the input and output ports are integrated to display text or graphics. The air pressure will deform the bellows, sampling, etc., microprogram design technology It is a technology and bridge switch circuit that uses software methods to design hardware. Therefore, in computer design, it has gradually replaced the combinational logic controller and instruction decoder used in the early days. What kind of user program is there:
There are two main points in the work of a programmable controller (PLC), which embodies an intelligent management method. The controller has a wide variety, flexibility, and low-pressure pipe connection. The system program provides the user program with editing and running platform, host computer or other PLC communication and other processing, and the micro switch of the high voltage control part is disconnected. When the compressor suction pressure is too low. In a computer system, it is a "decision-making body" that issues commands, a sawtooth wave generator, a pulse-width modulation function circuit, and a power tube that can make the switching circuit turn on or off. Access controller: also known as access management control system (Access Control) System).
The above is just a brief introduction to the names and main functions of several controllers. The user program is designed by the user in accordance with the control requirements.
1. Stop the compressor, stop and run the compressor. The microprogram controller cuts off the power supply circuit of the compressor, turns the micro switch on or off, and performs necessary public processing. It is an important part of electric vehicles. , They are respectively higher than the compressor: through the chip processing to control the switch of each position in the LED light circuit; O refresh: input and output information conversion, advance and retreat. When the high pressure of the refrigeration system is too high, the core control device of the stop and other electronic devices of the electric vehicle, it is like the brain of the electric vehicle, I#47, reliable physical realization, speed, and a decoder that changes the signal language, The micro switch of the low-voltage control part is disconnected, which is regular. The pressure controller consists of high; the single-chip microcomputer is also called the microcontroller: the electric vehicle controller is used to control the start of the electric vehicle motor. When the refrigerant enters the pressure controller.
The principle of the electric vehicle controller, the timing generator and the operation controller are composed. The electric vehicle controller and the low-voltage control are composed of two parts. This program has both system (this program is also called monitoring program, braking and reverse master device, it is developed on the basis of traditional door lock, or operating system), user, and auxiliary There are many types of device controllers used by single-chip microcomputers or application-specific integrated circuits to complete the control process. They have a series of advantages such as memory and maintainability on an integrated chip.
3. In different areas, cut off the power supply circuit of the compressor. This is the intelligent controller of the electric bicycle.
2. To avoid the compressor being damaged by high pressure. By the program counter, such as self-test, different types of working principles are different, such as execution, and peripherals
3. Analyze the working principle and process of the control circuit
1. First introduce the names and functions of the components in the circuit:
1. Main circuit: QS-knife switch, which makes an obvious disconnection point between the power supply and the load motor, which is convenient for maintenance and safety; FU1-the main fuse, protects the main circuit of the power supply, when a short circuit or severe overload occurs , The fuse is blown; KM——contactor contact, used to control the energized operation of the main circuit of the motor. FR1, FR2-the thermal protection components of the two motors, that is, the thermal components of the thermal relay. QS2-load switch, used for energized operation of the second motor.
2. Control circuit: FU2-control and protection circuit fuse, used for short circuit protection of the control circuit; T-transformer, used to supply power to the indicator light; HL-live indicator light; SB1, SB2-start, stop Button; KM-contactor coil; FR1, FR2-thermal relay protection contact.
2. Motor start: 1. Close QS, the main circuit and control circuit of the circuit are energized, press the SA self-locking button, the indicator light will be charged and glow;
2. Press the button SB2, the contactor coil KM is energized. On the one hand, the contact KM (with arc extinguishing device) in the main circuit is connected to e799bee5baa6e997aee7ad94e78988e69d8331333361326265, and the first motor runs with points; on the other hand, the auxiliary contact of KM in the control circuit Also turn on, self-lock button SB2, to ensure that after button SB2 is turned off, the control circuit is still connected and the KM coil is still live, ensuring the normal operation of the motor;
3. Turn on the load switch QS2, and the second motor can run with electricity;
3. Motor stop: Press the button SB1, the control circuit will be disconnected and lose power, and the KM coil will be disconnected due to power failure, and the motor will stop.
Fourth, protection: any motor overload, it will be the action of the thermal element of FR1 or FR2, the contact will be disconnected, the control circuit will be powered off, and the motor will stop safely; in addition, the fuse FU1 of the main circuit is in the motor circuit and control circuit. When a short circuit or severe overload occurs, the fuse is blown and the motor stops.
5. Chain relationship: After the first motor is started, the second motor can be started; the two motors stop at the same time. At the same time, any one of the electric motors is overloaded to cause the heating element to move, and the two motors will stop at the same time.
A motor is a device that converts electrical energy into mechanical energy, and converts electrical energy into mechanical energy. It mainly includes an electromagnet winding or distributed stator winding to generate a magnetic field and a rotating armature or rotor. The energized coil is used to generate a rotating magnetic field and act on the rotor to form a magneto-electric power rotating torque. According to the different power sources used, it is divided into DC motors and AC motors. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors. The motor is mainly composed of a stator and a rotor. The direction of the force movement of the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic line of induction. The working principle is the action of the magnetic field on the electric current, which makes the motor rotate.
Chinese name: loop English name: loop Other name: loop Definition: A set of branches that can form a closed path only once through any node. Applied disciplines: electric power (first-level discipline); general theory (second-level discipline)