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- Relays can be divided into several kinds according to the principle of action
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The main role of relays
Author： Time：2023-11-24 16:46:00CTR：
Relay is an automatic switch element with isolation function, which is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the most important control components. [
Relays generally have an induction mechanism (input part) that can reflect certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); There is an actuator (output part) that can realize "on" and "off" control of the controlled circuit; Between the input part and the output part of the relay, there is an intermediate mechanism (drive part) for coupling and isolating the input, functional processing and driving the output part.
As a control element, in summary, relays have the following functions: [
(1) Expand the control range: For example, when the control signal of the multi-contact relay reaches a certain value, it can be changed, broken, and connected to the multi-circuit at the same time according to different forms of the contact group.
(2) Amplification: For example, sensitive relays, intermediate relays, etc., can control a large power circuit with a very small control amount.
(3) Integrated signal: For example, when multiple control signals are input into multi-winding relays in the specified form, the predetermined control effect is achieved through comparative integration.
(4) Automatic, remote control, monitoring: for example, the relay on the automatic device, together with other electrical appliances, can form a program control line, so as to achieve automatic operation.
Relays generally have an induction mechanism (input part) that can reflect certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); There is an actuator (output part) that can realize "on" and "off" control of the controlled circuit; Between the input part and the output part of the relay, there is an intermediate mechanism (drive part) for coupling and isolating the input, functional processing and driving the output part.
As a control element, in summary, relays have the following functions: [
(1) Expand the control range: For example, when the control signal of the multi-contact relay reaches a certain value, it can be changed, broken, and connected to the multi-circuit at the same time according to different forms of the contact group.
(2) Amplification: For example, sensitive relays, intermediate relays, etc., can control a large power circuit with a very small control amount.
(3) Integrated signal: For example, when multiple control signals are input into multi-winding relays in the specified form, the predetermined control effect is achieved through comparative integration.
(4) Automatic, remote control, monitoring: for example, the relay on the automatic device, together with other electrical appliances, can form a program control line, so as to achieve automatic operation.
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2023-11-24The main role of relays
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2023-11-24The use of relay precautions
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2023-11-24Main test items of relays
