Relay control circuit and concentrator for acquiring data of electricity meter

Abstract

The utility model relates to a relay control circuit and a concentrator used for collecting ammeter data, a first end of a capacitor C1 is electrically connected with an input signal source PWM, a second end of the capacitor C1 is respectively electrically connected with an anode of a diode D1 and a cathode of a diode D2, a cathode of the diode D1 is respectively electrically connected with a first end of a capacitor C2 and a first end of a resistor R2, and a second end of the capacitor C2 is electrically connected with a second end of the resistor R2. The anode of the diode D2 is electrically connected with the second end of the capacitor C2 and the second end of the resistor R2, the capacitor C2 and the resistor R2 are connected in parallel, the first end of the capacitor C2 and the first end of the resistor R2 are electrically connected with the G pole of the MOS tube QU1, the second end of the capacitor C2 and the second end of the resistor R2 are electrically connected with the S pole of the MOS tube QU1 and are grounded, and the D pole of the MOS tube QU1 is electrically connected with the electromagnetic relay RE1. According to the utility model, the high and low levels of the square wave are used for continuously charging and discharging the relay control circuit, so that the relay control is realized, and the problem that the conventional relay control circuit is mistakenly touched and started when facing interference is solved.

Description

A relay control circuit and a concentrator for collecting electricity meter data. Technical Field

[0001] This utility model relates to the field of relay control, and in particular to a relay control circuit and a concentrator for collecting electricity meter data. Background Technology

[0002] With the continuous development of electronic technology, relays are widely used in various control circuits and play an indispensable role. The mainstream relay types on the market today can be broadly divided into electromagnetic relays and magnetic latching relays. Because the operating conditions of electromagnetic relays depend on whether the coil is energized, unstable voltage in the circuit can cause the relay to trip, leading to erroneous operation or shutdown of the circuit. Currently, existing electromagnetic relay circuits lack related control circuits. Summary of the Invention

[0003] The present invention aims to solve the above problems by providing a relay control circuit and a concentrator for collecting electricity meter data.

[0004] A relay control circuit includes: an input signal source PWM, capacitors C1 and C2, diodes D1 and D2, resistor R2, and MOSFET QU1. The first terminal of capacitor C1 is electrically connected to the input signal source PWM. The second terminal of capacitor C1 is electrically connected to the anode of diode D1 and the cathode of diode D2. The cathode of diode D1 is electrically connected to the first terminal of capacitor C2 and the first terminal of resistor R2. The anode of diode D2 is electrically connected to the second terminal of capacitor C2 and the second terminal of resistor R2. Capacitor C2 and resistor R2 are connected in parallel. The first terminal of capacitor C2 and the first terminal of resistor R2 are electrically connected to the gate (G) of MOSFET QU1. The second terminal of capacitor C2 and the second terminal of resistor R2 are electrically connected to the source (S) of MOSFET QU1 and grounded. The drain (D) of MOSFET QU1 is electrically connected to an electromagnetic relay RE1.

[0005] Preferably, it also includes a power supply VCC, which is a DC power supply, and the electromagnetic relay RE1 is electrically connected to the power supply VCC.

[0006] Preferably, the electromagnetic relay RE1 includes a first port 1, a second port COM, a third port OPEN, a fourth port CLOSE, and a fifth port 5. The first port 1 is electrically connected to the power supply VCC, and the fifth port 5 is electrically connected to the drain of the MOSFET QU1.

[0007] Preferably, the device further includes a diode D3, the cathode of which is electrically connected to the power supply VCC, and the anode of which is electrically connected to port 5 of the MOSFET QU1.

[0008] Preferably, it also includes a capacitor C3, the first end of which is electrically connected to the power supply VCC, and the second end of which is grounded.

[0009] Preferably, it further includes a resistor R1, the first end of which is electrically connected to the input signal source PWM, and the second end of which is electrically connected to the first end of the capacitor C1.

[0010] Preferably, the MOS transistor QU1 is an N-type MOS transistor.

[0011] Preferably, the capacitance of capacitor C2 is greater than or equal to four times the capacitance of capacitor C1.

[0012] Preferably, the input signal source PWM is a PWM square wave signal with a frequency range of 50Hz-100kHz.

[0013] A concentrator for collecting electricity meter data, using a relay control circuit as described in any of the above.

[0014] This invention has the following advantages: By continuously charging and discharging the relay control circuit through the high and low levels of the input signal source square wave, the relay control circuit is controlled, thus overcoming the problem of accidental activation when faced with interference in existing relay control circuits; the circuit uses the charging and discharging circuit to control the voltage of the MOS transistor, thereby controlling the start and stop of the relay; using PWM pulse signal as input is more stable and reliable; when faced with interference such as spike pulses, it can still correctly control the relay operation, ensuring the safety of the circuit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0016] Figure 1: Circuit diagram of this utility model;

[0017] Figure 2: Work flow diagram of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and examples:

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] As shown in Figures 1 and 2, a relay control circuit includes: an input signal source PWM, capacitors C1 and C2, diodes D1 and D2, resistor R2, and MOSFET QU1. The first terminal of capacitor C1 is electrically connected to the input signal source PWM. The second terminal of capacitor C1 is electrically connected to the anode of diode D1 and the cathode of diode D2. The cathode of diode D1 is electrically connected to the first terminal of capacitor C2 and the first terminal of resistor R2. The anode of diode D2 is electrically connected to the second terminal of capacitor C2 and the second terminal of resistor R2. Capacitor C2 and resistor R2 are connected in parallel. The first terminal of capacitor C2 and the first terminal of resistor R2 are electrically connected to the gate (G) of MOSFET QU1. The second terminal of capacitor C2 and the second terminal of resistor R2 are electrically connected to the source (S) of MOSFET QU1 and grounded. The drain (D) of MOSFET QU1 is electrically connected to an electromagnetic relay RE1.

[0023] Preferably, it also includes a power supply VCC, which is a DC power supply, and the electromagnetic relay RE1 is electrically connected to the power supply VCC.

[0024] Preferably, the electromagnetic relay RE1 includes a first port 1, a second port COM, a third port OPEN, a fourth port CLOSE, and a fifth port 5. The first port 1 is electrically connected to the power supply VCC, and the fifth port 5 is electrically connected to the drain (D) of the MOSFET QU1. The second port COM, the third port OPEN, and the fourth port CLOSE are all left floating.

[0025] It should be noted that the electromagnetic relay RE1 is existing technology.

[0026] Preferably, the device further includes a diode D3, the cathode of which is electrically connected to the power supply VCC, and the anode of which is electrically connected to port 5 of the MOSFET QU1. When the MOSFET QU1 is turned off, the diode D3 eliminates the induced current to prevent damage to the relay.

[0027] Preferably, the circuit also includes a capacitor C3, the first end of which is electrically connected to the power supply VCC, and the second end of which is grounded. The capacitor C3 serves as a protective capacitor to ensure that the ground potential is 0, thereby improving circuit safety.

[0028] Preferably, it further includes a resistor R1, the first end of which is electrically connected to the input signal source PWM, and the second end of which is electrically connected to the first end of the capacitor C1.

[0029] Preferably, the MOS transistor QU1 is an N-type MOS transistor, which turns on when the voltage reaches the turn-on voltage, and the relay circuit operates.

[0030] Preferably, the capacitance of capacitor C2 is greater than or equal to four times the capacitance of capacitor C1, ensuring that capacitor C1 completes multiple charge and discharge cycles before the voltage of capacitor C2 reaches the operating voltage of MOSFET QU1, thus completing the control of the relay circuit.

[0031] Preferably, the input signal source PWM is a PWM square wave signal with a frequency range of 50Hz-100kHz.

[0032] Working principle:

[0033] When there is no input to the circuit, the left side of capacitor C1 is at a high level and the right side is grounded and at a low level. When the input signal source PWM input is low, the left side of capacitor C1 becomes low, and the voltage difference between the two sides of capacitor C1 is maintained. At this time, diode D2 is turned on, and the current flows through diode D2 to charge capacitor C1 until capacitor C1 is fully charged.

[0034] When the input signal source PWM is high, both sides of the fully charged capacitor C1 are at high levels. Diode D1 conducts, charging capacitor C2. The voltage of capacitor C2 continuously increases, and MOSFET QU1 conducts, causing the relay to operate. When the input signal source PWM stops, capacitor C2 discharges, the voltage decreases, and MOSFET QU1 turns off. When MOSFET QU1 is on, the fourth port CLOSE of the electromagnetic relay RE1 is disconnected from the second port COM, while the third port OPEN is connected to the second port COM. When MOSFET QU1 is off, the fourth port CLOSE is connected to the second port COM, while the third port OPEN is disconnected from the second port COM.

[0035] A concentrator for collecting electricity meter data, using a relay control circuit as described in any of the above.

[0036] It should be noted that the relay control circuit can also be used in equipment such as dedicated transformer terminals and energy controllers.

[0037] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A relay control circuit, characterized in that, include: The circuit includes an input signal source PWM, capacitors C1 and C2, diodes D1 and D2, resistor R2, and MOSFET QU1. The first terminal of capacitor C1 is electrically connected to the input signal source PWM. The second terminal of capacitor C1 is electrically connected to the anode of diode D1 and the cathode of diode D2. The cathode of diode D1 is electrically connected to the first terminal of capacitor C2 and the first terminal of resistor R2. The anode of diode D2 is electrically connected to the second terminal of capacitor C2 and the second terminal of resistor R2. Capacitor C2 and resistor R2 are connected in parallel. The first terminal of capacitor C2 and the first terminal of resistor R2 are electrically connected to the gate (G) of MOSFET QU1. The second terminal of capacitor C2 and the second terminal of resistor R2 are electrically connected to the source (S) of MOSFET QU1 and grounded. The drain (D) of MOSFET QU1 is electrically connected to electromagnetic relay RE1.

2. The relay control circuit according to claim 1, characterized in that: It also includes a power supply VCC, which is a DC power supply, and the electromagnetic relay RE1 is electrically connected to the power supply VCC.

3. A relay control circuit according to claim 2, characterized in that: The electromagnetic relay RE1 includes a first port 1, a second port COM, a third port OPEN, a fourth port CLOSE, and a fifth port 5. The first port 1 is electrically connected to the power supply VCC, and the fifth port 5 is electrically connected to the drain of the MOSFET QU1.

4. A relay control circuit according to claim 3, characterized in that: It also includes diode D3, the cathode of which is electrically connected to power supply VCC, and the anode of which is electrically connected to port 5 of MOSFET QU1.

5. A relay control circuit according to claim 2, characterized in that: It also includes capacitor C3, the first end of which is electrically connected to the power supply VCC, and the second end of which is grounded.

6. A relay control circuit according to claim 1, wherein: It also includes a resistor R1, the first end of which is electrically connected to the input signal source PWM, and the second end of which is electrically connected to the first end of the capacitor C1.

7. A relay control circuit according to claim 1, characterized in that: The MOS transistor QU1 is an N-type MOS transistor.

8. A relay control circuit according to claim 1, characterized in that: The capacitance of capacitor C2 is greater than or equal to four times the capacitance of capacitor C1.

9. A relay control circuit according to claim 1, wherein: The input signal source PWM is a PWM square wave signal with a frequency range of 50Hz-100kHz.

10. A concentrator for collecting meter data, characterized by: Use the relay control circuit as described in any one of claims 1 to 9.

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