Knowledge of working principle of the relay

by:MOSO     2020-03-10
Working principle of the relay knowledge relay is an electronic control device, it has a control system ( Also called input circuit) And control system ( Is also called the output circuit) , usually used in automatic control circuit, it is actually with less current to control large current of a kind of 'automatic switch'. In a circuit plays an automatic adjustment, safety protection, conversion circuit, and so on. What is the relay? Power (subject: Level 1 subject) ; Relay protection and automation ( The secondary subject) The relay is an electronic control device, it has a control system ( Also called input circuit) And control system ( Is also called the output circuit) , usually used in automatic control circuit, it is actually with less current to control large current of a kind of 'automatic switch'. In a circuit plays an automatic adjustment, safety protection, conversion circuit, and so on. Relay: the definition of a relay is a kind of when the input ( Electricity, magnetism, sound, light and heat) Reaches a certain value, the output will change by leaps and bounds of the automatic control device. Relay knowledge relay is an electronic control device, it has a control system ( Also called input circuit) And control system ( Is also called the output circuit) , usually used in automatic control circuit, it is actually with less current to control large current of a kind of 'automatic switch'. In a circuit plays an automatic adjustment, safety protection, conversion circuit, and so on. Relay several functions: 1) Expanding the scope of the control. For example, multiple contact relay control signal reaches a certain value, can according to the different forms of contact group, and at the same time, open circuit, multi-channel circuit is connected. 2) Zoom in. Sensitive type relay, intermediate relay, etc, for example, with a very small amount of control, can control the circuit of large power. 3) Integrated signal. In the form of a control signal according to the rules, for example, when the input more winding relay, after a more comprehensive, to the expected control effect. 4) Automatic, remote control and monitoring. Automatic device, for example, relay and other electric equipment, can be composed of program control circuit, so as to realize automatic operation. Electromagnetic relay working principle and characteristics of the electromagnetic relay is generally composed of iron core, coil and armature, contact reeds, etc. As long as the voltage on both ends of the coil with a certain, will flow through a certain amount of current in the coil, producing electromagnetic effect, the armature will be under the action of the electromagnetic attraction to overcome the return spring tension suction to the core, so as to drive the armature of the moving contact and the static contact ( Normally open contacts) And off. After the coil power, electromagnetic suction also disappear, armature reaction force in the spring to return to the original position, the moving contact with the original static contact ( Normally closed contacts) And off. So suck, release, so as to achieve the conduction, the purpose of the cut in the circuit. For relay 'normally open, normally closed contacts, it can be to distinguish: relay coil is not energized the static contact in the off state, called a' normally open contacts '; In the connected state of static contact is called 'normally closed contacts. The structure and working principle of electromagnetic relay electromagnetic relay is a relay of the earliest and most widely used a relay. Electromagnetic relay is generally composed of iron core, the electromagnetic coil, armature, reset spring, contact, bearing and pins, etc. The working principle of electromagnetic relay is not complicated, it is mainly using the electromagnetic induction principle and work. When passing a current coil, coil to produce magnetic field, coil magnetization magnet in the middle of the core. Which make the armature electromagnetic suction under the action of suction to the core, the armature drive the strut pushes away the plate spring, make two normally closed off contact. When disconnect relay coil current, the core loss of magnetic, armature under the action of plate spring, restore the initial state, the contacts are closed. Contact form generally divided into three kinds: one kind is a relay coil is not energized the static contact in the connected state, called a normally closed contact. With the letter H; The second is in the off state of the static contact, called the normally open contacts, expressed in D; Another is a moving contact with a static contact normally closed, and with a static contact normally open at the same time, the formation of a conversion to open a closed contact form. I said with letters. Normally closed contacts by closed disconnect when energized coil, so is also called dynamic contact, and called the normally open contact dynamic contact switch contact has two cases, namely first and after the transformation of the broken contact and break before make the transformation of the figure 7 - contact 2 lists the circuit in the form of contact. In a relay, can have one or several ( Group) Normally open, normally closed contact and the corresponding transformation contact form.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...
Dear friend,thanks for your inquiry. Please leave your company E-mail and phone number, we will contact you asap. Have a good day!Contact E-mail:Niki.li@mosopower.com TEl: +86-755-27657000