Solid-state relay of contactless switch

Abstract

A capacitor C1 and a capacitor C4 are connected in series to form a capacitor bank, a resistor R5, a transient diode TVS2 and the capacitor bank are sequentially arranged in parallel, the negative electrode of a diode D1 is electrically connected with the R5, the positive electrode of the diode D1 is electrically connected with one end of a resistor R3, the other end of the resistor R3 is electrically connected with the transient diode TVS2, and the other end of the resistor R3 is electrically connected with the capacitor bank. One end of the resistor R2 is connected between the resistor R1 and the resistor R4, the other end of the resistor R2 is electrically connected to an input pin IN of the MOS control unit, the transient diode TVS6 is connected between the input pin IN and an output pin IS of the MOS control unit and is grounded, one end of the transient diode TVS1 is electrically connected with a base power supply wiring pin VBB of the MOS control unit, and the other end of the transient diode TVS2 is electrically connected with a base power supply wiring pin VBB of the MOS control unit. The MOS control unit is used for replacing a contact switch for control, the service life is long, the circuit is suitable for high-punching and vibration working environments, and the sensitivity is high.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a solid-state relay of a non-contact switch. Background technique [0002] Relay (English name: relay) is an electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] In the prior art, the electrical contacts of the relay usually use dynamic and static...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the electrical contacts of the relay usually use dynamic and static contacts to cooperate to form a contact switch, so as to be used as a switching device for the circuit, but at least the following defects exist: 1. A moving contact is required for switching between the moving and static contacts. Perform high-frequency movement, resulting in mechanical fatigue and short life; 2. Not suitable for harsh environments with high mechanical shock and high-frequency vibration; 3. The sensitivity of the output signal is relatively low, and it is necessary to increase the mechanical electromagnetic driver or actuator buffer

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