A surge backup protector with high-speed identification function controlled by IC

Abstract

The present invention relates to a surge backup protector with a high-speed identification function controlled by an IC. The technical problem to be solved by the present invention is to provide a surge backup protector with a high-speed identification function controlled by an IC. The technical solution adopted by the present invention: it includes a sensing module, a processing module, an amplifying module and a tripping module, the sensing module is used to convert the alternating current in the line into direct current that can be received by the IC chip; the processing module receives the current of the sensing module, processes the current, and outputs a command current when the current reaches a certain value according to customer needs; the amplifying module is used to amplify the command current output by the processing module to drive the tripping coil to trip; the tripping module is used as the tripping action of the surge backup protector. The advantages of the present invention are: solving the safety hazards of the surge protector; using the IC chip control method for tripping control, the control is accurate and fast, and the recognition ability is strong; the tripping malfunction is less and the efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of surge backup protectors, in particular to a surge backup protector controlled by an IC and having a high-speed identification function. Background Art

[0002] Lightning disasters are one of the most serious natural disasters. Lightning overvoltage and lightning electromagnetic pulses cause more and more damage to systems and equipment. The use of surge protectors to suppress surges and transient overvoltages on the lines and discharge overcurrents on the lines has become one of the important links in modern lightning protection technology.

[0003] A surge backup protector (i.e., a backup protector for a surge protector) is suitable for locations where lightning protection equipment such as a surge protector (SPD) has been installed. It can eliminate fire hazards caused by surge protector degradation and power grid failures, solve the problem of surge protector failure caused by lightning, ensure that the surge protector does not catch fire and the lightning protection function remains effective; at the same time, it effectively overcomes the protection blind spot problem caused by using fuses or circuit breakers as external disconnectors.

[0004] The surge backup protectors currently on the market all connect the circuit to the tripping coil in the surge backup protector. When the current passing through the circuit exceeds the preset value, the coil reaches a certain magnetic field, triggering the tripping coil to trip, causing the spark generated by the large current to arc between the contacts of the surge backup protector, thereby protecting the surge protector. However, the actual situation is that since there is a tripping coil connected in the circuit, and the tripping coil itself is an impedance with resistance, when a large current passes through the surge backup protector, after the tripping coil trips, due to the coil impedance, the real arcing effect cannot be achieved at the contact, so that the protection of the surge protector still has safety hazards; on the other hand, the existing surge backup protector has limited lightning protection effect. Summary of the Invention

[0005] In order to solve the above problems, the technical problem to be solved by the present invention is to provide a surge backup protector controlled by an IC and having a high-speed identification function.

[0006] The technical solution adopted by the present invention is characterized by comprising a sensing module, a processing module, an amplification module, and a tripping module. The sensing module includes a first induction coil disposed in phase A of the line and a diode D1 connected in series to the b-end of the first induction coil. The sensing module is used to convert the alternating current in the line into direct current that can be received by the IC chip.

[0007] The processing module includes an IC chip, a capacitor C1, a capacitor C2 and an adjustable resistor R3 connected to the IC chip. The processing module receives the current from the sensing module, processes the current, and outputs a command current when the current reaches a certain value according to customer needs;

[0008] One end of the amplifying module is connected to the processing module and the other end is connected to the tripping module. The amplifying module is used to amplify the command current output by the processing module to drive the tripping coil to trip;

[0009] The tripping module includes a full bridge, a tripping coil having one end connected to the e end of the full bridge and the other end connected to the line neutral line, and a thyristor K having one end connected to the d end of the full bridge and the other end connected to the f end of the full bridge. The tripping module serves as a tripping action of the surge backup protector.

[0010] The IC chip includes an IC first pin connected to end a of the first induction coil, an IC second pin, an IC third pin connected to end a of the first induction coil, an IC fourth pin, an IC fifth pin, an IC sixth pin, an IC seventh pin, and an IC eighth pin connected to the other end of the diode D1. One end of the capacitor C1 is connected to the IC sixth pin and the other end is connected to the IC seventh pin. One end of the capacitor C2 is connected to end a of the first induction coil and the other end is connected to the IC second pin. One end of the adjustable resistor R3 is connected to the IC fourth pin and the other end is connected to the IC fifth pin. The IC eighth pin serves as a power input pin, and the IC sixth pin serves as an output pin for a trip command current. The capacitors C1 and C2 are used to filter out interference signals and clutter to prevent malfunction of the IC chip. The adjustable resistor R3 is used to fine-tune the current within the IC chip.

[0011] A resistor R1 is provided between the eighth pin of the IC and the diode D1 , and the resistor R1 serves to limit the current.

[0012] An adjustable resistor R2 is provided between the end a of the first induction coil and the first pin of the IC. The adjustable resistor R2 is used to adjust the current in the circuit.

[0013] The induction module further includes a second induction coil and a diode D2 connected in parallel between the first induction coil and the diode D1, and a third induction coil and a diode D3 connected in parallel between the first induction coil and the diode D1. The second induction coil is sleeved on the phase B of the line and is connected in series with the diode D2. The third induction coil is sleeved on the phase C of the line and is connected in series with the diode D3.

[0014] The amplification module includes a transistor Q1, a transistor Q2 and a transistor Q3. The base of the transistor Q1 is connected to the sixth pin of the IC. The collectors of the transistor Q1, the collectors of the transistor Q2 and the collectors of the transistor Q3 are all connected to the d end of the full bridge. The emitter of the transistor Q1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the base of the transistor Q3, and the emitter of the transistor Q3 is connected to the thyristor K. A resistor R4 is provided between the base of the transistor Q1 and the f end of the full bridge.

[0015] A resistor R5 is provided between the emitter of the transistor Q1 and the base of the transistor Q2.

[0016] A voltage stabilizing diode ZD is connected in parallel to both ends of the thyristor K. A resistor R6 is connected in series to the voltage stabilizing diode ZD. The voltage stabilizing diode ZD is used to prevent the thyristor K from malfunctioning.

[0017] The advantages of the present invention are: replacing the original method of directly connecting the tripping coil to the line, the lightning protection effect of the surge backup protector is greatly improved, and the safety hazards of the surge protector are solved; the IC chip control method is used for tripping control, which has precise control, fast control speed and strong recognition ability; the tripping malfunction is rare and the efficiency is high; the tripping current can be adjusted according to user needs, and the adaptability is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a working principle diagram of the surge backup protector with high-speed identification function controlled by IC of the present invention;

[0020] Figure 2 This is a circuit diagram of a surge backup protector with a high-speed identification function controlled by an IC according to the present invention;

[0021] Figure 3 yes Figure 2 Magnified image of . DETAILED DESCRIPTION

[0022] like Figure 1-3As shown, the present invention relates to an IC-controlled surge backup protector with a high-speed identification function, comprising a sensing module 1, a processing module 2, an amplifying module 3, and a tripping module 4. The sensing module 1 comprises a first induction coil 5 sleeved in phase A of the line, and a diode D1 connected in series to the b-end of the first induction coil 5. The sensing module 1 is used to convert the alternating current in the line into direct current that can be received by the chip, and to power the chip to enable the chip to operate. The processing module 2 comprises an IC chip 19, a capacitor C1 connected to the IC chip 19, a capacitor C2, and an adjustable resistor R3. The processing module 2 receives the current from the sensing module 1, processes the current, and outputs a command current according to customer needs when the current reaches a certain value; one end of the amplification module 3 is connected to the processing module 2 and the other end is connected to the tripping module 4. The amplification module 3 is used to amplify the command current output by the processing module 2 to drive the tripping coil to trip; the tripping module 4 includes a full bridge 20, a tripping coil 21 with one end connected to the e end of the full bridge 20 and the other end connected to the line neutral line, and a thyristor K with one end connected to the d end of the full bridge 20 and the other end connected to the f end of the full bridge 20. The tripping module 4 is used for the tripping action of the surge backup protector.

[0023] The IC chip 19 includes an IC first pin 11 and an IC second pin 12 connected to end a of the first induction coil 5, an IC third pin 13, an IC fourth pin 14, an IC fifth pin 15, an IC sixth pin 16, and an IC seventh pin 17 connected to end a of the first induction coil 5, and an IC eighth pin 18 connected to the other end of the diode D1. One end of the capacitor C1 is connected to the IC sixth pin 16 and the other end is connected to the IC seventh pin 17. One end of the capacitor C2 is connected to end a of the first induction coil 5 and the other end is connected to the IC second pin 12. One end of the adjustable resistor R3 is connected to the IC fourth pin 14 and the other end is connected to the IC fifth pin 15. The IC eighth pin 18 serves as a power input pin, and the IC sixth pin 16 serves as an output pin for the trip command current. The capacitors C1 and C2 are used to filter out interference signals and clutter to prevent malfunction of the IC chip. The adjustable resistor R3 is used to fine-tune the current within the IC chip.

[0024] A resistor R1 is provided between the eighth pin 18 of the IC and the diode D1 , and the resistor R1 serves to limit the current.

[0025] An adjustable resistor R2 is provided between the end a of the first induction coil 5 and the first pin 11 of the IC. The adjustable resistor R2 is used to adjust the current in the circuit.

[0026] The induction module 1 further includes a second induction coil 6 and a diode D2 connected in parallel between the first induction coil 5 and the diode D1, and a third induction coil 7 and a diode D3 connected in parallel between the first induction coil 5 and the diode D1. The second induction coil 6 is sleeved on the phase B of the line and is connected in series with the diode D2. The third induction coil 7 is sleeved on the phase C of the line and is connected in series with the diode D3.

[0027] The amplification module 3 includes a transistor Q1, a transistor Q2, and a transistor Q3. The base of the transistor Q1 is connected to the sixth pin 16 of the IC. The collectors of the transistors Q1, Q2, and Q3 are all connected to the d-terminal of the full bridge 20. The emitter of the transistor Q1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the base of the transistor Q3, and the emitter of the transistor Q3 is connected to the thyristor K. A resistor R4 is provided between the base of the transistor Q1 and the f-terminal of the full bridge 20. The resistor R4 can prevent malfunction of the trip coil.

[0028] A resistor R5 is provided between the emitter of the transistor Q1 and the base of the transistor Q2 to prevent current from backflowing and damaging the chip.

[0029] A voltage stabilizing diode ZD is connected in parallel to both ends of the thyristor K. A resistor R6 is connected in series to the voltage stabilizing diode ZD. The voltage stabilizing diode ZD is used to prevent the thyristor K from malfunctioning.

[0030] The full bridge 20 is the most commonly used circuit for rectifying by using the unidirectional conductivity of a diode, and is often used to convert alternating current into direct current. The C and E ends of the full bridge are the AC ends, the D end of the full bridge is the positive end, and the F end of the full bridge is the negative end.

[0031] When the circuit is operating normally, the surge protector also operates normally. The IC chip is not powered, so the trip coil has no operation. The trip coil is equivalent to an impedance device, which plays a role in current limiting and voltage reduction. When the surge protector deteriorates or is damaged by multiple high-current shocks such as lightning, when current is generated in any of the A, B, and C phases in the circuit, the induction coil generates an induced current. After current limiting by resistor R1, the IC chip is powered. The IC chip adjusts the adjustable resistors R2 and R3 according to the trip current set by the customer. When the external current is greater than the set trip current, the sixth pin of the IC chip issues a trip command current, which is amplified by the transistor of the amplification module and then given to the thyristor. The thyristor is turned on, connecting the d and f terminals of the full bridge, forming a short circuit, connecting the c and e terminals of the full bridge, energizing the trip coil, driving the trip mechanism to disconnect the circuit and play a protective role.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A surge backup protector with high-speed identification function controlled by IC, characterized in that: The invention comprises a sensing module (1), a processing module (2), an amplifying module (3) and a tripping module (4), wherein the sensing module (1) comprises a first sensing coil (5) sleeved in phase A of a line, and a diode D1 connected in series to the b end of the first sensing coil (5), and the sensing module (1) is used to convert the alternating current in the line into direct current that can be received by an IC chip; The processing module (2) comprises an IC chip (19), a capacitor C1 and a capacitor C2 connected to the IC chip (19), and an adjustable resistor R3; the IC chip (19) comprises an IC first pin (11) and an IC second pin (12) connected to the a end of the first induction coil (5); an IC third pin (13), an IC fourth pin (14), an IC fifth pin (15), an IC sixth pin (16), an IC seventh pin (17) connected to the a end of the first induction coil (5); and an IC eighth pin (18) connected to the other end of the diode D1; one end of the capacitor C1 is connected to the IC sixth pin (16) and the other end is connected to the IC seventh pin (17); one end of the capacitor C2 is connected to the a end of the first induction coil (5) and the other end is connected to the IC second pin (12); one end of the adjustable resistor R3 is connected to the IC fourth pin (14) and the other end is connected to the IC fifth pin (15) connection, the eighth pin (18) of the IC is used as a power input pin, the sixth pin (16) of the IC is used as an output pin of the trip command current, the capacitors C1 and C2 are used to filter out interference signals and clutter to prevent the IC chip from malfunctioning, the adjustable resistor R3 is used to fine-tune the internal current of the IC chip, a resistor R1 is provided between the eighth pin (18) of the IC and the diode D1, the resistor R1 plays a current limiting role, an adjustable resistor R2 is provided between the a end of the first induction coil (5) and the first pin (11) of the IC, the adjustable resistor R2 is used to adjust the current in the circuit, the processing module (2) receives the current of the sensing module (1), processes the current, and outputs the command current when the current reaches a certain value according to customer needs; One end of the amplifying module (3) is connected to the processing module (2) and the other end is connected to the tripping module (4). The amplifying module (3) comprises a transistor Q1, a transistor Q2 and a transistor Q3. The base of the transistor Q1 is connected to the sixth pin (16) of the IC. The collectors of the transistor Q1, the collectors of the transistor Q2 and the collectors of the transistor Q3 are all connected to the d-end of the full bridge (20). The emitter of the transistor Q1 is connected to the base of the transistor Q2. The emitter of the transistor Q2 is connected to the base of the transistor Q3. The emitter of the transistor Q3 is connected to the thyristor K. A resistor R4 is provided between the base of the transistor Q1 and the f-end of the full bridge (20). The amplifying module (3) is used to amplify the command current output by the processing module (2) to drive the tripping coil to trip. The tripping module (4) comprises a full bridge (20), a tripping coil (21) having one end connected to the e end of the full bridge (20) and the other end connected to the line neutral line, and a thyristor K having one end connected to the d end of the full bridge (20) and the other end connected to the f end of the full bridge (20). The tripping module (4) is used for the tripping action of the surge backup protector.

2. The surge backup protector with high-speed identification function controlled by IC according to claim 1, characterized in that: The induction module (1) further comprises a second induction coil (6) connected in parallel between the first induction coil (5) and the two ends of the diode D1, a diode D2, and a third induction coil (7) connected in parallel between the first induction coil (5) and the two ends of the diode D1, a diode D3, wherein the second induction coil (6) is sleeved on the phase B of the line and connected in series with the diode D2, and the third induction coil (7) is sleeved on the phase C of the line and connected in series with the diode D3.

3. The surge backup protector with high-speed identification function controlled by IC according to claim 1, characterized in that: A resistor R5 is provided between the emitter of the transistor Q1 and the base of the transistor Q2.

4. The surge backup protector with high-speed identification function controlled by IC according to claim 1, characterized in that: A voltage stabilizing diode ZD is connected in parallel to both ends of the thyristor K. A resistor R6 is connected in series to the voltage stabilizing diode ZD. The voltage stabilizing diode ZD is used to prevent the thyristor K from malfunctioning.

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