CN217332736U

CN217332736U - Zero-crossing detection function realization and calibration circuit

Info

Publication number: CN217332736U
Application number: CN202123216288.0U
Authority: CN
Inventors: 郝俊魁; 周文韬; 李夏冰; 李想
Original assignee: Shanghai Liangxin Smart Electric Co ltd; Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Smart Electric Co ltd; Shanghai Liangxin Electrical Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-08-30
Anticipated expiration: 2031-12-20

Abstract

A zero-crossing detection function realization and calibration circuit is characterized in that: the output end of the first working power supply is connected to the relay and outputs a second working power supply through the relay, the output end of the first working power supply is further connected to the first rectifying circuit, the output end of the first rectifying circuit is connected to the pre-stage zero-crossing detection module circuit, the output end of the pre-stage zero-crossing detection module circuit is connected to the MCU, the output end of the relay is further connected to the second rectifying circuit, the output end of the second rectifying circuit is connected to the post-stage zero-crossing detection module circuit, the output end of the post-stage zero-crossing detection module circuit is connected back to the MCU, the output end of the MCU is connected to the relay control circuit module, and the relay control circuit module is connected to the relay. The utility model is used for relay control circuit's relevant performance parameter's detection to improve the performance of product, reduce the cost of product.

Description

Zero-crossing detection function realization and calibration circuit

Technical Field

The utility model belongs to the technical field of relay circuit performance parameter detects, specifically say so and relate to a zero cross detection function realizes and calibration circuit, can be used for relay control circuit's relevant performance parameter's detection.

Background

Along with the continuous development of society and science and technology, people have higher and higher requirements on quality and life, more and more types of intelligent electrical equipment are provided, and the requirements of load types on a key controllable device relay are higher and higher under different application environments; a Relay (Relay), also called Relay, is an electronic control device having a control system (also called input loop) and a controlled system (also called output loop), usually applied in an automatic control circuit, which is actually an "automatic switch" that uses a smaller current to control a larger current. The circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The existing relay has the following defects in the process of controlling the opening and closing of the equipment circuit:

(1) the relay is easy to burn out due to overlarge voltage and current at the moment of closing the relay;

(2) arcing and adhesion are caused at the moment of disconnection of the relay, so that the relay cannot be disconnected;

(3) easily cause product damage and have high additional cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a zero-crossing detection function realizes and calibration circuit to the defect that above-mentioned current relay control circuit exists for relay control circuit's relevant performance parameter's detection, thereby improve relay control circuit's performance parameter, improve the performance of product, reduce the cost of product.

Technical scheme

In order to realize the technical purpose, the utility model provides a zero cross detection function realizes and calibration circuit, its characterized in that: the output end of the first working power supply is connected to the relay and outputs a second working power supply through the relay, the output end of the first working power supply is further connected to a first rectifying circuit, the output end of the first rectifying circuit is connected to a preceding stage zero-crossing detection module circuit, the output end of the preceding stage zero-crossing detection module circuit is connected to a main control module MCU, the output end of the relay is further connected to a second rectifying circuit, the output end of the second rectifying circuit is connected to a subsequent stage zero-crossing detection module circuit, the output end of the subsequent stage zero-crossing detection module circuit is connected back to the main control module MCU, the output end of the main control module MCU is connected to a relay control circuit module S5, and the relay control circuit module is connected to the relay.

Further, the first working power supply is a 220V alternating current mains supply input power supply.

Further, the second working power supply is a 220V alternating current commercial power output power supply.

Further, the first rectifying circuit and the second rectifying circuit are diode rectifying circuits.

Furthermore, the front-stage zero-crossing detection module circuit and the rear-stage zero-crossing detection module circuit both comprise a capacitor, a resistor and a triode.

Advantageous effects

The utility model provides a pair of zero crossing detection function realizes and calibration circuit, has the advantage of following several aspects:

(1) the zero detection of the power supply voltage can be realized when the relay is closed, the phenomenon that the contact of the relay is burnt out due to overlarge voltage and current in the closing moment of the relay is avoided, and the product performance is improved.

(2) The zero point detection of the power supply voltage can be realized when the relay is disconnected, arc discharge and adhesion caused in the moment of relay disconnection are avoided, the relay can not be disconnected, and the product performance is improved.

(3) Simple structure and low production cost.

Drawings

Fig. 1 is a schematic diagram of a connection relationship according to an embodiment of the present invention.

Fig. 2 is a circuit diagram of zero-crossing detection in the embodiment of the present invention.

Fig. 3 is a circuit diagram of a relay control circuit in an embodiment of the present invention.

Fig. 4 is a waveform diagram of output of the first rectifying circuit and the second rectifying circuit in the embodiment of the present invention.

Fig. 5 is the embodiment of the present invention, wherein the output waveform of the preceding stage zero-crossing detection module circuit and the succeeding stage zero-crossing detection module circuit.

Fig. 6 is a logic diagram for implementing the embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside", "outside", and the like are directions or positional relationships based on the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Examples

As shown in fig. 1, a zero-crossing detection function implementation and calibration circuit includes a working power supply S1, the output terminal of the first operating power source S1 is connected to the relay S2 and outputs a second operating power source S3 via the relay S2, the output end of the first working power supply S1 is also connected to a first rectifying circuit S4, the output end of the first rectifying circuit S4 is connected to a front-stage zero-crossing detection module circuit S7, the output end of the preceding stage zero crossing detection module circuit S7 is connected to the main control module MCUS8, the output end of the relay S2 is also connected to a second rectifying circuit S6, the output end of the second rectifying circuit S6 is connected to a rear-stage zero-crossing detection module circuit S9, the output end of the rear-stage zero-crossing detection module circuit S9 is connected back to the master control module MCUS8, the output terminal of the master control module MCUS8 is connected to the relay control circuit module S5, and the relay control circuit module S5 is connected to the relay S2.

The first working power supply S1 is a 220V alternating current mains supply input power supply and mainly provides a necessary working power supply for a rear-stage load; the relay S2 mainly controls the on-off of the voltage of a second working power supply S3; the second working power supply S3 is a 220V alternating current commercial power output power supply and mainly provides a necessary working power supply for a rear-stage load; the first rectifying circuit S4 mainly converts 220V alternating current into pulsating direct current, and the specific waveform is shown in figure 4; the first rectifying circuit S4 is a diode rectifying circuit, and the first rectifying circuit S4 provides necessary zero-crossing point voltage signal acquisition for the preceding stage zero-crossing detection module circuit S7; the preceding-stage zero-crossing detection module circuit S7 mainly outputs a square wave signal, and the specific square wave signal is as shown in fig. 5.

The front zero-crossing detection module circuit S7 mainly includes a capacitor, a resistor, and a transistor, and the front zero-crossing detection module circuit S7 includes, but is not limited to, the above-mentioned electronic components. The front-stage zero-crossing detection module circuit S7 mainly outputs square wave signals to provide zero signal acquisition for the master control module MCUS 8; the specific implementation circuit can be as shown in fig. 2.

The master control module MCUS8 mainly receives the front stage zero crossing detection module circuit S7 square wave signal and the rear stage zero crossing detection module circuit S9 square wave signal and controls the relay control circuit module S5; as shown in fig. 6, when the master control module MCUS8 receives a zero-point jump signal of the front-stage zero-crossing detection module circuit S7, the master control module MCUS8 sends a close signal to the relay S2 by controlling the relay control circuit module S5, which is recorded as time T1, when the master control module MCUS8 receives a zero-point jump signal of the rear-stage zero-crossing detection module circuit S9, which is recorded as time T2, and at this time T2-T1 is time required by the relay to close; the time for sending the closing signal next time can be adjusted according to the closing time; further realizing the time zero calibration function of the closed signal; the same principle is that: when the master control module S8 sends out a relay S2 disconnection signal to the relay through controlling the relay control circuit module S5, the time is recorded as time T3, when the master control module MCUS8 receives a zero-point jump signal of the rear-stage zero-crossing detection module circuit S9, the time is recorded as time T4, and at the time, T4-T3 are the disconnection time of the relay; the time for sending the turn-off signal next time can be adjusted according to the turn-off time, so that the time zero calibration function of the turn-off signal is realized;

the relay control circuit module S5 mainly controls the on and off states of the relay, and the specific implementation circuit is as shown in fig. 3; the rear-stage zero-crossing detection module circuit S9 mainly outputs a square wave signal, specifically, the square wave signal is as shown in fig. 5, the rear-stage zero-crossing detection module circuit S9 mainly includes a capacitor, a resistor, a triode, and the like, and the rear-stage zero-crossing detection module circuit S9 includes, but is not limited to, the above-mentioned electronic components. The rear-stage zero-crossing detection module circuit S9 mainly outputs square wave signals to provide zero signal acquisition for the master control module MCUS 8; the specific implementation circuit can refer to fig. 2; the second rectifying circuit S6 mainly converts 220V alternating current into pulsating direct current, the specific waveform is shown in figure 4, the second rectifying circuit S6 is a diode rectifying circuit, and the second rectifying circuit S6 provides necessary zero-crossing voltage signal acquisition for the later-stage zero-crossing detection module circuit S9;

the zero-crossing detection function realization and calibration circuit provided by the embodiment is used for detecting related performance parameters of the relay control circuit, thereby improving the performance parameters of the relay control circuit, improving the performance of a product and reducing the cost of the product.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A zero-crossing detection function realization and calibration circuit is characterized in that: the device comprises a first working power supply (S1), wherein the output end of the first working power supply (S1) is connected to a relay (S2) and outputs a second working power supply (S3) through the relay (S2), the output end of the first working power supply (S1) is also connected to a first rectifying circuit (S4), the output end of the first rectifying circuit (S4) is connected to a preceding stage zero-crossing detection module circuit (S7), the output end of the preceding stage zero-crossing detection module circuit (S7) is connected to a main control module MCU (S8), the output end of the relay (S2) is also connected to a second rectifying circuit (S6), the output end of the second rectifying circuit (S6) is connected to a subsequent stage zero-crossing detection module circuit (S9), the output end of the subsequent stage zero-crossing detection module circuit (S9) is connected back to the main control module MCU (S8), and the output end of the main control module MCU (S8) is connected to a relay control circuit module (S5), the relay control circuit module (S5) is connected to a relay (S2).

2. A zero-crossing detection function implementation and calibration circuit as claimed in claim 1, wherein: and the first working power supply (S1) is a 220V alternating current commercial power input power supply.

3. A zero-crossing detection function implementation and calibration circuit as claimed in claim 1, wherein: and the second working power supply (S3) is a 220V alternating current commercial power output power supply.

4. A zero-crossing detection function implementation and calibration circuit as claimed in claim 1, wherein: the rectifying circuit I (S4) and the rectifying circuit II (S6) are diode rectifying circuits.

5. A zero-crossing detection function implementation and calibration circuit as claimed in claim 1, wherein: the front-stage zero-crossing detection module circuit (S7) and the rear-stage zero-crossing detection module circuit (S9) both comprise a capacitor, a resistor and a triode.