it consists of an input terminal, an output terminal and a control circuit. The input terminal is composed of a triode or a diode, and these components control the output terminal through controlled current or voltage. The output end consists of another triode or a diode, which can control the high-power load.
working principle:
when the current or voltage at the control terminal changes, the control element will change its state and control the current or voltage to pass through the output terminal. In this way, the current or voltage at the output will change, thus controlling the high-power load.
because it uses semiconductor components, it has many advantages, such as low power consumption, high stability, long life, high sensitivity and high voltage driving ability.
but because it doesn't work through mechanical contacts, it will be unstable in the environment with high frequency interference.
in addition, the single-phase solid-state relay has some limitations. Its working voltage is usually low, generally not exceeding 6V, so it cannot be used in high voltage applications. In addition, its input usually needs a certain driving voltage, so it cannot be directly controlled by low-level signals.
because it has good high-speed response characteristics, it is very useful in controlling high-speed motors and other high-speed loads. It is also commonly used in industrial automation, smart home, medical equipment, communication equipment and other fields.
Single-phase solid-state relay can generally replace other types of relays, such as magnetic relay and transistor relay, because it has higher stability, reliability and service life.
in addition to the above advantages and limitations, there are some other features worthy of attention.
1. input current: the input current of single-phase solid-state relay is usually very small, which can be driven by micro-current, so it can improve the system efficiency.
2. Response speed: The response speed of single-phase solid-state relay is very fast, which can reach microsecond level, so it can meet the needs of high-speed control applications.
3. insulation resistance: the insulation resistance of single-phase solid-state relay is very high, which can reach thousands of volts, which makes it work in high voltage environment.
4. working temperature: the working temperature range of single-phase solid-state relay is wide, and it can generally work in the temperature range of -4℃~85℃.
5. Life: The life of single-phase solid-state relay is very long, which can reach millions of working cycles, which makes it meet the application requirements of long-term operation.
6. fire resistance: because there is no mechanical contact, it does not generate sparks, so it has good fire resistance.
7. low noise: because there is no mechanical contact, it has no mechanical noise, so it has good mute performance.
due to these advantages, solid-state succession