Three-phase static switch acceleration switching circuit structure

Abstract

The utility model discloses an acceleration switching circuit structure of a three-phase static switch, which comprises a common power supply serving as an electric energy input end of a circuit; one end of the resistor R1 is electrically connected with the output end of the frequently-used power supply; one end of the capacitor C2 is electrically connected with the other end of the resistor R1, the resistor R1 and the capacitor C2 form a series branch, and the other end of the capacitor C2 is connected with an output power supply; the anode of the first diode S1 is electrically connected with the output end of the frequently-used power supply, and the cathode of the first diode S1 is electrically connected with the other end of the capacitor C2; the cathode of the second diode S2 is electrically connected with the output end of the frequently-used power supply, and the anode of the second diode S2 is electrically connected with the other end of the capacitor C2; and one end of the switch K1 is connected with the first output end of the bridge rectifier circuit, and the other end of the switch K1 is connected with the second output end of the bridge rectifier circuit. The circuit structure is high in reliability, small in size and free of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, specifically to a three-phase static switch accelerated switching circuit structure. Background Technology

[0002] Three-phase static switches are core devices for achieving rapid load switching in power systems, and their switching speed directly affects the continuity of power supply. Existing technologies mostly use thyristors (SCRs) or insulated-gate bipolar transistors (IGBTs) to construct bidirectional switching circuits, achieving commutation through zero-voltage / zero-current detection. However, traditional solutions have significant drawbacks: 1) Thyristor commutation relies on the natural zero-crossing of the AC voltage, with switching times typically reaching 10-20 ms, which cannot meet the millisecond-level switching requirements of precision equipment; 2) While IGBTs offer faster switching speeds, they must be used in series in high-voltage applications, leading to complex drive circuits and voltage equalization issues; 3) Transient circulating currents exist during switching, easily causing overvoltage / overcurrent surges and threatening equipment safety; 4) Control strategies often employ fixed-delay triggering, making it difficult to adapt to grid frequency fluctuations and dynamic load changes. These problems restrict the further application of static switches in data centers, smart grids, and other fields. Utility Model Content

[0003] The purpose of this invention is to provide a circuit structure that is highly reliable and compact.

[0004] The proposed circuit structure is as follows:

[0005] A three-phase static switch accelerated switching circuit structure includes:

[0006] Common power supply, used as the electrical energy input terminal of the circuit;

[0007] Resistor R1, one end of which is electrically connected to the output terminal of the commonly used power supply;

[0008] One end of capacitor C2 is electrically connected to the other end of resistor R1. Resistor R1 and capacitor C2 form a series branch. The other end of capacitor C2 is connected to the output power supply.

[0009] The first diode S1 has its anode electrically connected to the output terminal of the commonly used power supply, and its cathode electrically connected to the other end of the capacitor C2;

[0010] The cathode of the second diode S2 is electrically connected to the output terminal of the commonly used power supply, and the anode is electrically connected to the other end of the capacitor C2.

[0011] Switch K1, one end of which is connected to the first output terminal of the bridge rectifier circuit, and the other end of which is connected to the second output terminal of the bridge rectifier circuit;

[0012] The bridge rectifier circuit consists of four diodes forming a bridge structure. Its first terminal is connected to the cathode of the second diode S2, the positive terminal of the output terminal is connected to one end of the inductor L1, and the negative terminal of the output terminal is connected to the other end of the inductor L1.

[0013] Inductor L1 is connected to the output terminal of the bridge rectifier circuit, and the other end is connected to one end of capacitor C1.

[0014] Capacitor C1 is connected to inductor L1, and the other end is used as the output terminal and connected to the output power supply.

[0015] Furthermore, when switch K1 is closed, the external input signal is rectified by the bridge rectifier circuit, processed by inductor L1 and capacitor C1, and then output through the output power supply.

[0016] Furthermore, the bridge rectifier circuit includes four diodes:

[0017] The anode of the first diode D1 is electrically connected to the cathode of the second diode D2, and the cathode of the first diode D1 serves as the first input terminal of the bridge rectifier structure.

[0018] The anode of the third diode D3 is electrically connected to the cathode of the fourth diode D4, and the cathode of the third diode D3 serves as the second input terminal of the bridge rectifier structure.

[0019] The anode of the second diode D2 is electrically connected to the anode of the fourth diode D4, forming the first output terminal of the bridge rectifier structure;

[0020] The anode of the first diode D1 is electrically connected to the anode of the third diode D3, forming the second output terminal of the bridge rectifier structure.

[0021] Furthermore, a backup power supply serves as the electrical energy input terminal of the circuit;

[0022] Resistor R2, one end of which is electrically connected to the output terminal of the backup power supply;

[0023] One end of capacitor C3 is electrically connected to the other end of resistor R2. Resistor R2 and capacitor C3 form a series branch. The other end of capacitor C3 is connected to the output power supply.

[0024] The third diode S3 has its anode electrically connected to the output terminal of the backup power supply, and its cathode electrically connected to the other end of the capacitor C3;

[0025] The fourth diode S4 has its cathode electrically connected to the output terminal of the power supply, and its anode electrically connected to the other end of capacitor C3;

[0026] Switch K2, one end of which is connected to the first output terminal of the second bridge rectifier circuit, and the other end of which is connected to the second output terminal of the second bridge rectifier circuit;

[0027] The second bridge rectifier circuit consists of a bridge structure composed of four diodes. Its first end is connected to one end of the inductor L1, and the other end is connected to the anode of the third diode S3.

[0028] Furthermore, the second bridge rectifier circuit includes four diodes:

[0029] The anode of the fifth diode D5 is electrically connected to the cathode of the sixth diode D6, and the cathode of the fifth diode D5 serves as the first input terminal of the bridge rectifier circuit.

[0030] The anode of the seventh diode D7 is electrically connected to the cathode of the eighth diode D8, and the cathode of the seventh diode D7 serves as the second input terminal of the bridge rectifier circuit.

[0031] The anode of the sixth diode D6 is electrically connected to the anode of the eighth diode D8, forming the first output terminal of the bridge rectifier circuit;

[0032] The anode of the fifth diode D5 is electrically connected to the anode of the seventh diode D7, forming the second output terminal of the bridge rectifier circuit.

[0033] The beneficial effects of this utility model are:

[0034] The resonant circuit input is achieved by controlling switches K1 and K2. The circuit structure is simple and the size is small. Attached Figure Description

[0035] Figure 1 This is the circuit structure diagram of this utility model. Detailed Implementation

[0036] like Figure 1 As shown, this utility model discloses a three-phase static switch acceleration switching circuit structure, including: a common power supply, serving as the power input terminal of the circuit; a resistor R1, one end of which is electrically connected to the output terminal of the common power supply; a capacitor C2, one end of which is electrically connected to the other end of the resistor R1, the resistor R1 and the capacitor C2 forming a series branch, the other end of the capacitor C2 being connected to the output power supply; a first diode S1, the anode of which is electrically connected to the output terminal of the common power supply, and the cathode of which is electrically connected to the other end of the capacitor C2; a second diode S2, the cathode of which is electrically connected to the output terminal of the common power supply, and the anode of which is electrically connected to the other end of the capacitor C2; a switch K1, one end of which is connected to the first output terminal of the bridge rectifier circuit, and the other end of which is connected to the second output terminal of the bridge rectifier circuit; the bridge rectifier circuit, consisting of four diodes forming a bridge structure, the first end of which is connected to the cathode of the second diode S2, the positive terminal of which is connected to one end of the inductor L1, and the negative terminal of which is connected to the other end of the inductor L1.

[0037] Inductor L1 is connected to the output terminal of the bridge rectifier circuit, and the other end is connected to one end of capacitor C1.

[0038] Capacitor C1 is connected to inductor L1, and the other end is used as the output terminal and connected to the output power supply.

[0039] Furthermore, when switch K1 is closed, the external input signal is rectified by the bridge rectifier circuit, processed by inductor L1 and capacitor C1, and then output through the output power supply.

[0040] Furthermore, the bridge rectifier circuit includes four diodes: the anode of the first diode D1 is electrically connected to the cathode of the second diode D2, and the cathode of the first diode D1 serves as the first input terminal of the bridge rectifier structure; the anode of the third diode D3 is electrically connected to the cathode of the fourth diode D4, and the cathode of the third diode D3 serves as the second input terminal of the bridge rectifier structure; the anode of the second diode D2 is electrically connected to the anode of the fourth diode D4, forming the first output terminal of the bridge rectifier structure; and the anode of the first diode D1 is electrically connected to the anode of the third diode D3, forming the second output terminal of the bridge rectifier structure.

[0041] Furthermore, a backup power supply serves as the electrical input terminal of the circuit; a resistor R2, one end of which is electrically connected to the output terminal of the backup power supply; a capacitor C3, one end of which is electrically connected to the other end of the resistor R2, with the resistor R2 and capacitor C3 forming a series branch, and the other end of capacitor C3 connected to the output power supply; a third diode S3, whose anode is electrically connected to the output terminal of the backup power supply and whose cathode is electrically connected to the other end of capacitor C3; and a fourth diode S4, whose cathode is electrically connected to the output terminal of the output power supply and whose anode is electrically connected to the other end of capacitor C3.

[0042] Switch K2, one end of which is connected to the first output terminal of the second bridge rectifier circuit, and the other end of which is connected to the second output terminal of the second bridge rectifier circuit;

[0043] The second bridge rectifier circuit consists of a bridge structure composed of four diodes. Its first end is connected to one end of the inductor L1, and the other end is connected to the anode of the third diode S3.

[0044] Furthermore, the second bridge rectifier circuit includes four diodes:

[0045] The anode of the fifth diode D5 is electrically connected to the cathode of the sixth diode D6, and the cathode of the fifth diode D5 serves as the first input terminal of the bridge rectifier circuit.

[0046] The anode of the seventh diode D7 is electrically connected to the cathode of the eighth diode D8, and the cathode of the seventh diode D7 serves as the second input terminal of the bridge rectifier circuit.

[0047] The anode of the sixth diode D6 is electrically connected to the anode of the eighth diode D8, forming the first output terminal of the bridge rectifier circuit;

[0048] The anode of the fifth diode D5 is electrically connected to the anode of the seventh diode D7, forming the second output terminal of the bridge rectifier circuit.

[0049] The working principle of this utility model is as follows:

[0050] 1. When the main power supply is working and the backup power supply is energized, S1 and S2 are conducting, and S3 and S4 are closed. When switch K2 is closed, C1 is charged and the circuit is kept in the return state.

[0051] 2. When the power supply loses voltage, it needs to be actively shut off (not a current zero-crossing switch). K1, C1 and L1 are closed instantaneously. After resonance, S1 and S2 are quickly shut off to prepare for the closing speed of S3 and S4.

[0052] 3. When S3 and S4 are closed, the system operates in standby mode. When K1 is closed, the C1 is recharged by the normal power supply.

[0053] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A three-phase static switching accelerated switching circuit structure, characterized by, Comprise: a common power supply as the power input of the circuit; a resistor R1, one end of which is electrically connected to the output end of the common power supply; a capacitor C2, one end of which is electrically connected to the other end of the resistor R1, and the resistor R1 and the capacitor C2 form a series branch, and the other end of the capacitor C2 is connected to the output power supply; a first diode S1, the anode of which is electrically connected to the output end of the common power supply, and the cathode of which is electrically connected to the other end of the capacitor C2; a second diode S2, the cathode of which is electrically connected to the output end of the common power supply, and the anode of which is electrically connected to the other end of the capacitor C2; a switch K1, one end of which is connected to the first output end of the bridge rectifier circuit, and the other end of which is connected to the second output end of the bridge rectifier circuit; a bridge rectifier circuit, which is composed of four diodes in a bridge structure, the first end of which is connected to the cathode of the second diode S2, the positive output end of which is connected to one end of the inductor L1, and the negative output end of which is connected to the other end of the inductor L1; an inductor L1, which is connected to the output end of the bridge rectifier circuit, and the other end of which is connected to one end of the capacitor C1; a capacitor C1, which is connected to the inductor L1, and the other end of which is connected to the output power supply as the output end.

2. The circuit structure according to claim 1, wherein: when the switch K1 is closed, the external input signal is rectified by the bridge rectifier circuit in turn, processed by the inductor L1 and the capacitor C1 in cooperation, and then output through the output power supply.

3. The circuit structure according to claim 2, wherein: the bridge rectifier circuit comprises four diodes: the anode of the first diode D1 is electrically connected to the cathode of the second diode D2, and the cathode of the first diode D1 is the first input end of the bridge rectifier structure; the anode of the third diode is electrically connected to the cathode of the fourth diode D4, and the cathode of the third diode is the second input end of the bridge rectifier structure; the anode of the second diode D2 is electrically connected to the anode of the fourth diode D4, forming the first output end of the bridge rectifier structure; the anode of the first diode D1 is electrically connected to the anode of the third diode, forming the second output end of the bridge rectifier structure.

4. The circuit structure according to claim 3, wherein: a standby power supply as the power input of the circuit; a resistor R2, one end of which is electrically connected to the output end of the standby power supply; a capacitor C3, one end of which is electrically connected to the other end of the resistor R2, and the resistor R2 and the capacitor C3 form a series branch, and the other end of the capacitor C3 is connected to the output power supply; a third diode S3, the anode of which is electrically connected to the output end of the standby power supply, and the cathode of which is electrically connected to the other end of the capacitor C3; a fourth diode S4, the cathode of which is electrically connected to the output end of the output power supply, and the anode of which is electrically connected to the other end of the capacitor C3; a switch K2, one end of which is connected to the first output end of the second bridge rectifier circuit, and the other end of which is connected to the second output end of the second bridge rectifier circuit; a second bridge rectifier circuit, which is composed of four diodes in a bridge structure, the first end of which is connected to one end of the inductor L1, and the other end of which is connected to the anode of the third diode S3.

5. The circuit structure according to claim 4, wherein: the second bridge rectifier circuit comprises four diodes: Anode of the fifth diode D5 is electrically connected with cathode of the sixth diode D6, cathode of the fifth diode D5 is the first input end of the bridge rectifier circuit; Anode of the seventh diode D7 is electrically connected with cathode of the eighth diode D8, cathode of the seventh diode D7 is the second input end of the bridge rectifier circuit; Anode of the sixth diode D6 is electrically connected with anode of the eighth diode D8, forming the first output end of the bridge rectifier circuit; Anode of the fifth diode D5 is electrically connected with anode of the seventh diode D7, forming the second output end of the bridge rectifier circuit.

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