Low-power high-low voltage isolation pulse generating device

Abstract

The utility model relates to the technical field of high-voltage pulse generating devices, in particular to a low-power high-low voltage isolation pulse generating device. Comprising a signal generator U1, a first 5V low-voltage side power supply end VCC, a first low-voltage side reference ground end GND, an optical coupling load resistor R2, an optical coupling isolation switch U2, a second 5V low-voltage side power supply end VCC, a high-voltage side power supply end HV, a pulse input current-limiting resistor R1, an optical coupling isolation switch U3, a second low-voltage side reference ground end GND, a pulse charging capacitor C1 and a pulse output current-limiting resistor R3. According to the low-power high-low voltage isolation pulse generation device, the topological structures of the signal generator U1, the optical coupling isolation switch U2 and the optical coupling isolation switch U3 are arranged and work in a coordinated manner, so that effective isolation of high-low voltage circuits and accurate control of pulse signals are realized, the hardware structure is simplified, the test function is powerful, and the test efficiency is improved. The method can be widely applied to high and low voltage isolation test and performance verification of a control system.

Description

Technical Field

[0001] This utility model relates to the technical field of high voltage pulse generators, specifically to a low-power high-low voltage isolated pulse generator. Background Technology

[0002] High-voltage pulse generators are a common and critical component in electronic devices and systems widely used in power systems, communication equipment, testing instruments, and industrial control.

[0003] Existing high-voltage pulse generators typically employ complex hardware structures, including multiple transformers, filters, inductors, and capacitors. This complex design not only increases the physical size and weight of the equipment but also complicates debugging and maintenance, thereby reducing testing efficiency. Furthermore, high-voltage pulse generators need to process high-voltage signals during operation, but existing devices generally lack effective high- and low-voltage isolation measures. This not only threatens the safety of the equipment but also increases the risk of electric shock and endangers the safety of operators. Due to the complex hardware structure and expensive materials, the manufacturing cost of existing high-voltage pulse generators is high. Additionally, existing high-voltage pulse generators typically use fixed pulse generation circuits with unadjustable output pulse duration, significantly limiting the flexibility of the equipment in practical applications and making it difficult to meet the specific needs of different scenarios.

[0004] Therefore, in order to solve the above problems, there is an urgent need to provide a low-power high and low voltage isolated pulse generator to simplify the hardware structure, reduce costs, provide high and low voltage isolation functions and real-time adjustment of output pulse time, thereby improving the safety, reliability and adaptability of the equipment. Utility Model Content

[0005] The purpose of this invention is to provide a low-power high and low voltage isolation pulse generator to solve the technical problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model discloses a low-power high-low voltage isolated pulse generator, comprising a signal generator U1, a first 5V low-voltage power supply terminal VCC, a first low-voltage reference ground terminal GND, an optocoupler load resistor R2, an optocoupler isolation switch U2, a second 5V low-voltage power supply terminal VCC, a high-voltage power supply terminal HV, a pulse input current limiting resistor R1, an optocoupler isolation switch U3, a second low-voltage reference ground terminal GND, a pulse charging capacitor C1, a pulse output current limiting resistor R3, a high-voltage reference ground terminal HV-GND, and a pulse signal output terminal OUT-Pulse;

[0007] The signal generator U1 includes three pins: pin 1 is the power supply terminal, pin 2 is the ground terminal, and pin 3 is the output terminal. The power supply terminal of pin 1 of the signal generator U1 is connected in series with the first 5V low-voltage power supply terminal VCC. The ground terminal of pin 2 of the signal generator U1 is connected to the first low-voltage terminal reference ground GND. The output terminal of pin 3 of the signal generator U1 is connected in series with the optocoupler load resistor R2.

[0008] The optocoupler disconnect switch U2 includes pin 4 (cathode AN), pin 5 (anode CA), pin 9 (second channel output D2), pin 10 (second channel output D2), pin 15 (first channel output D1), and pin 16 (first channel output D1). Pins 9 and 10 are connected in parallel, and pins 15 and 16 are connected in parallel. Pin 4 (cathode AN) of the optocoupler disconnect switch U2 is connected in series with the second 5V low-voltage power supply terminal VCC. Pins 15 and 16 are connected in parallel and then connected in series with the pulse input current limiting resistor R1 and the high-voltage power supply terminal HV.

[0009] Optionally, the optocoupler disconnect switch U3 includes pin 4 (cathode AN), pin 5 (anode CA), pin 9 (second channel output D2), pin 10 (second channel output D2), pin 15 (first channel output D1), and pin 16 (first channel output D1). Pins 9 and 10 are connected in parallel, and pins 15 and 16 are connected in parallel. Therefore, pin 5 (anode AN) of the optocoupler disconnect switch U3... CA is connected in series with the second low-voltage reference ground GND. The anode CA of pin 5 of the optocoupler disconnect switch U2 is connected to the cathode AN of pin 4 of the optocoupler disconnect switch U3. The second channel output terminal D2 of pin 9 of the optocoupler disconnect switch U2 is connected in parallel to the second channel output terminal D2 of pin 10, and then connected in parallel with the first channel output terminal D1 of pin 15 of the optocoupler disconnect switch U3 and the first channel output terminal D1 of pin 16, and then connected to the pulse signal output terminal OUT-Pulse.

[0010] Optionally, the topology circuit connecting the second channel output terminal D2 of pin 9 of the optocoupler disconnect switch U2, which is connected in parallel to the second channel output terminal D2 of pin 10, and the first channel output terminal D1 of pin 15 of the optocoupler disconnect switch U3, which is connected in parallel to the first channel output terminal D1 of pin 16, to the pulse signal output terminal OUT-Pulse, is then connected in series with the pulse charging capacitor C1, the pulse output current limiting resistor R3, and the high voltage reference ground terminal HV-GND. The second channel output terminal D2 of pin 9 of the optocoupler disconnect switch U3, which is connected in parallel to the second channel output terminal D2 of pin 10, is then connected in a topology between the pulse charging capacitor C1 and the pulse output current limiting resistor R3.

[0011] Optionally, the signal generator U1 outputs a pulse signal PWM waveform, and the output waveform is a rectangular wave. Different duty cycles and frequencies can be set to generate control pulse signals to control the closing and conducting actions of optocoupler isolation switches U2 and U3. The high-voltage power supply terminal HV can adjust different pulse amplitudes to provide high-voltage power and drive the high-voltage side circuit to work. The pulse charging capacitor C1 can adjust its capacitance to adjust the rising and falling edges of the output PWM waveform, and is used to store and release energy to form a pulse signal.

[0012] Optionally, the signal generator U1 is model SG3525, and the high level of the signal generator U1 is 5V and the low level is 0V, used to generate control pulse signals. The optocoupler disconnect switches U2 and U3 are both Pai85 series optocoupler-compatible digital isolators purchased from Rongpai Semiconductor, and the withstand voltage of the optocoupler disconnect switches U2 and U3 is 5KV. They have the characteristics of electrical isolation, signal transmission, compatibility, high operability, low power consumption and strong anti-interference.

[0013] Optionally, the resistance value of the pulse input current limiting resistor R1 is equal to the resistance value of the pulse output current limiting resistor R3, both ranging from 1KΩ to 10KΩ with an accuracy of 1%. The pulse input current limiting resistor R1 is used to limit the current of the input pulse signal, and the pulse output current limiting resistor R3 is used to limit the current of the output pulse signal. The resistance value of the optocoupler load resistor R2 ranges from 10KΩ to 100KΩ with an accuracy of 1%, and is used to control the amplitude of the input signal and provide appropriate current to the output terminals of the optocoupler disconnect switches U2 and U3 to ensure normal conduction and closing operations.

[0014] Optionally, the resistance of the pulse charging capacitor C1 is in the range of 10nF-100nF, and the withstand voltage is 50V. It is used for energy storage and filtering, smoothing pulse signals, and reducing noise and interference.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This low-power high and low voltage isolation pulse generator achieves effective isolation of high and low voltage circuits and precise control of pulse signals by setting up a topology of signal generator U1, optocoupler disconnect switch U2, and optocoupler disconnect switch U3, and coordinating their operation. It simplifies the hardware structure and has powerful testing functions, making it widely applicable in high and low voltage isolation testing and performance verification of control systems, as well as in high voltage pulse output methods and circuit architectures. It not only enables real-time adjustment of the output pulse but also adds high and low voltage isolation functionality, improving test stability, efficiency, and safety. Attached Figure Description

[0017] Figure 1 This is a circuit diagram illustrating the high-voltage pulse output principle of the low-power high-low voltage isolated pulse generator of this utility model.

[0018] The attached diagram is labeled as follows: 1. Signal generator U1; 2. First 5V low-voltage power supply terminal VCC; 3. First low-voltage terminal reference ground GND; 4. Optocoupler load resistor R2; 5. Optocoupler isolation switch U2; 6. Second 5V low-voltage power supply terminal VCC; 7. High-voltage power supply terminal HV; 8. Pulse input current limiting resistor R1; 9. Optocoupler isolation switch U3; 10. Second low-voltage terminal reference ground GND; 11. Pulse charging capacitor C1; 12. Pulse output current limiting resistor R3; 13. High-voltage terminal reference ground HV-GND; 14. Pulse signal output terminal OUT-Pulse. Detailed Implementation

[0019] The technical solution of this utility model will be described in detail below through specific embodiments.

[0020] Reference Figure 1 As shown, this utility model discloses a low-power high-low voltage isolated pulse generator, including a signal generator U11, a first 5V low-voltage power supply terminal VCC2, a first low-voltage reference ground terminal GND3, an optocoupler load resistor R24, an optocoupler isolation switch U25, a second 5V low-voltage power supply terminal VCC6, a high-voltage power supply terminal HV7, a pulse input current limiting resistor R18, an optocoupler isolation switch U39, a second low-voltage reference ground terminal GND10, a pulse charging capacitor C111, a pulse output current limiting resistor R312, a high-voltage reference ground terminal HV-GND13, and a pulse signal output terminal OUT-Pulse14;

[0021] The signal generator U11 has three pins: pin 1 is the power supply terminal, pin 2 is the ground terminal, and pin 3 is the output terminal. The power supply terminal of pin 1 of the signal generator U11 is connected in series with the first 5V low voltage power supply terminal VCC2, the ground terminal of pin 2 of the signal generator U11 is connected in series with the first low voltage reference ground terminal GND3, and the output terminal of pin 3 of the signal generator U11 is connected in series with the optocoupler load resistor R24.

[0022] The optocoupler disconnect switch U25 includes pin 4 (cathode AN), pin 5 (anode CA), pin 9 (second channel output D2), pin 10 (second channel output D2), pin 15 (first channel output D1), and pin 16 (first channel output D1). Pins 9 and 10 are connected in parallel, and pins 15 and 16 are connected in parallel. Pin 4 (cathode AN) of the optocoupler disconnect switch U25 is connected in series with the second 5V low-voltage power supply terminal VCC6. Pins 15 and 16 are connected in parallel and then connected in series with the pulse input current limiting resistor R18 and the high-voltage power supply terminal HV7.

[0023] Preferably, the optocoupler disconnect switch U39 includes pin 4 (cathode AN), pin 5 (anode CA), pin 9 (second channel output D2), pin 10 (second channel output D2), pin 15 (first channel output D1), and pin 16 (first channel output D1). Pins 9 and 10 are connected in parallel, and pins 15 and 16 are connected in parallel. Therefore, pin 5 (anode) of the optocoupler disconnect switch U39... Terminal CA is connected in series with the second low-voltage reference ground terminal GND10. The anode terminal CA of pin 5 of optocoupler disconnect switch U25 is connected to the cathode terminal AN of pin 4 of optocoupler disconnect switch U39. The second channel output terminal D2 of pin 9 of optocoupler disconnect switch U25 is connected in parallel to the second channel output terminal D2 of pin 10, and then connected in parallel with the first channel output terminal D1 of pin 15 of optocoupler disconnect switch U39 and then connected to the first channel output terminal D1 of pin 16. This connection is then topologically connected to the pulse signal output terminal OUT-Pulse14.

[0024] Preferably, the topology circuit connecting the second channel output terminal D2 of pin 9 of optocoupler disconnect switch U25 to the second channel output terminal D2 of pin 10, and the first channel output terminal D1 of pin 15 of optocoupler disconnect switch U39 to the first channel output terminal D1 of pin 16, and connected to the pulse signal output terminal OUT-Pulse14, is then connected in series with the pulse charging capacitor C111, the pulse output current limiting resistor R312, and the high voltage reference ground terminal HV-GND13. The second channel output terminal D2 of pin 9 of optocoupler disconnect switch U39 is connected in parallel with the second channel output terminal D2 of pin 10 and then connected in a topology between the pulse charging capacitor C111 and the pulse output current limiting resistor R312.

[0025] Preferably, the signal generator U11 outputs a pulse signal PWM waveform, and the output waveform is a rectangular wave. Different duty cycles and frequencies can be set to generate control pulse signals to control the closing and conducting actions of optocoupler disconnect switches U25 and U39. The high-voltage power supply terminal HV7 can adjust different pulse amplitudes to provide high-voltage power and drive the high-voltage side circuit to work. The pulse charging capacitor C111 can adjust its capacitance to adjust the rising and falling edges of the output PWM waveform, and is used to store and release energy to form a pulse signal.

[0026] Preferably, the signal generator U11 is model SG3525, and the high level of the signal generator U11 is 5V and the low level is 0V. It is used to generate control pulse signals. The optocoupler disconnect switches U25 and U39 are both Pai85 series optocoupler-compatible digital isolators purchased from Rongpai Semiconductor. The withstand voltage of the optocoupler disconnect switches U25 and U39 is 5KV. They have the characteristics of electrical isolation, signal transmission, compatibility, high operability, low power consumption and strong anti-interference. They are used to realize the electrical isolation of high and low voltage circuits and protect the low voltage control circuit. The optocoupler disconnect switch U25 is used for high voltage side control and the optocoupler disconnect switch U39 is used for low voltage side control.

[0027] Preferably, the resistance value of the pulse input current limiting resistor R18 is equal to that of the pulse output current limiting resistor R312, both ranging from 1KΩ to 10KΩ with an accuracy of 1%. The pulse input current limiting resistor R18 is used to limit the current of the input pulse signal to prevent excessive current from damaging the subsequent circuit. The pulse output current limiting resistor R312 is used to limit the current of the output pulse signal to prevent excessive current from damaging the subsequent circuit or affecting the signal quality. The optocoupler load resistor R24 ​​has a resistance range of 10KΩ to 100KΩ with an accuracy of 1%. It is used to control the amplitude of the input signal and provide appropriate current to the output terminals of the optocoupler disconnect switches U25 and U39 to ensure normal conduction and closing operations, while limiting current to protect the circuit.

[0028] Preferably, the pulse charging capacitor C111 has a resistance range of 10nF-100nF and a withstand voltage of 50V. It is used for energy storage and filtering, smoothing pulse signals, reducing noise and interference, and ensuring that the pulse signal maintains stable energy during transmission.

[0029] Working principle: First, under the action of the first 5V low-voltage power supply terminal VCC2, the signal generator U11 outputs a PWM pulse rectangular wave. When the output of the signal generator U11 is low, the cathode AN of pin 4 of the optocoupler U25 is at a high level and the anode CA of pin 5 is at a low level, which satisfies the conduction condition and makes the optocoupler U25 conduct. When the cathode AN of pin 4 of the optocoupler U39 is at a high level and the anode CA of pin 5 is at a low level, the conduction condition is not met, and the optocoupler U39 is closed. When the optocoupler U25 is conducting, the pulse charging capacitor C111 is charged and stored through the pulse input current limiting resistor R18, resulting in a high-level output. Then, when the output of the signal generator U11 is high, the optocoupler U25... When pin 4 (cathode AN) of optocoupler U25 is at a low level and pin 5 (anode CA) is at a high level, the conduction condition cannot be met, causing optocoupler U25 to close. However, when pin 4 (cathode AN) of optocoupler U39 is at a low level and pin 5 (anode CA) is at a high level, the conduction condition is met, causing optocoupler U39 to conduct. When optocoupler U39 is conducting, the pulse charging capacitor C111 is discharged through the pulse output current limiting resistor R312, resulting in a low-level output. Finally, when the signal generator U11 sends a control signal, optocoupler U25 and optocoupler U39 sequentially conduct or close, causing the pulse signal output terminal OUT-Pulse14 to generate a high-voltage pulse signal, which is used to test the response capability and withstand voltage performance of different controllers.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-power high / low voltage isolation pulse generator, characterized in that: Includes signal generator U1 (1), first 5V low voltage power supply terminal VCC (2), first low voltage reference ground terminal GND (3), optocoupler load resistor R2 (4), optocoupler isolation switch U2 (5), second 5V low voltage power supply terminal VCC (6), high voltage power supply terminal HV (7), pulse input current limiting resistor R1 (8), optocoupler isolation switch U3 (9), second low voltage reference ground terminal GND (10), pulse charging capacitor C1 (11), pulse output current limiting resistor R3 (12), high voltage reference ground terminal HV-GND (13), and pulse signal output terminal OUT-Pulse (14); The signal generator U1(1) includes three pins: pin 1 is the power supply terminal, pin 2 is the ground terminal, and pin 3 is the output terminal. The power supply terminal of pin 1 of the signal generator U1(1) is connected in series with the first 5V low voltage test power supply terminal VCC(2). The ground terminal of pin 2 of the signal generator U1(1) is connected in series with the first low voltage terminal reference ground terminal GND(3). The output terminal of pin 3 of the signal generator U1(1) is connected in series with the optocoupler load resistor R2(4). The optocoupler disconnect switch U2(5) includes pin 4 (cathode AN), pin 5 (anode CA), pin 9 (second channel output terminal D2), pin 10 (second channel output terminal D2), pin 15 (first channel output terminal D1), and pin 16 (first channel output terminal D1). Pin 9 (second channel output terminal D2) and pin 10 (second channel output terminal D2) are used in parallel, and pin 15 (first channel output terminal D1) and pin 16 (first channel output terminal D1) are used in parallel. Then, pin 4 (cathode AN) of the optocoupler disconnect switch U2(5) is connected in series with the second 5V low voltage test power supply terminal VCC(6). Pin 15 (first channel output terminal D1) and pin 16 (first channel output terminal D1) of the optocoupler disconnect switch U2(5) are connected in parallel and then connected in series with the pulse input current limiting resistor R1(8) and the high voltage test power supply terminal HV(7).

2. The low-power high / low voltage isolated pulse generator according to claim 1, characterized in that: The optocoupler disconnect switch U3(9) includes pin 4 (cathode AN), pin 5 (anode CA), pin 9 (second channel output D2), pin 10 (second channel output D2), pin 15 (first channel output D1), and pin 16 (first channel output D1). Pin 9 and pin 10 are connected in parallel, and pin 15 and pin 16 are connected in parallel. Therefore, pin 5 (anode CA) of the optocoupler disconnect switch U3(9) is connected to the second low-voltage... The reference ground terminal GND (10) is connected in series. The positive terminal CA of pin 5 of the optocoupler disconnect switch U2 (5) is connected to the negative terminal AN of pin 4 of the optocoupler disconnect switch U3 (9). The second channel output terminal D2 of pin 9 of the optocoupler disconnect switch U2 (5) is connected in parallel to the second channel output terminal D2 of pin 10, and then connected in parallel to the first channel output terminal D1 of pin 15 of the optocoupler disconnect switch U3 (9), and then connected to the first channel output terminal D1 of pin 16, and topologically connected to the pulse signal output terminal OUT-Pulse (14).

3. The low-power high / low voltage isolated pulse generator according to claim 2, characterized in that: The topology circuit connected to the pulse signal output terminal OUT-Pulse (14) is connected between the second channel output terminal D2 of pin 9 of the optocoupler isolation switch U2 (5) and the first channel output terminal D1 of pin 15 of the optocoupler isolation switch U3 (9) and the first channel output terminal D1 of pin 16. The pulse charging capacitor C1 (11), the pulse output current limiting resistor R3 (12), and the high voltage reference ground terminal HV-GND (13) are connected in series in the topology. The second channel output terminal D2 of pin 9 of the optocoupler isolation switch U3 (9) is connected in parallel to the second channel output terminal D2 of pin 10 and then connected in the topology between the pulse charging capacitor C1 (11) and the pulse output current limiting resistor R3 (12).

4. A low-power high / low voltage isolated pulse generator according to claim 3, characterized in that: The signal generator U1(1) outputs a pulse signal PWM waveform, and the output waveform is a rectangular wave. Different duty cycles and frequencies can be set. The high voltage power supply terminal HV(7) can adjust different pulse amplitudes. The pulse charging capacitor C1(11) can adjust its capacitance to adjust the rising and falling edges of the output PWM waveform.

5. A low-power high / low voltage isolated pulse generator according to claim 4, characterized in that: The signal generator U1(1) is model SG3525, and the high level of the signal generator U1(1) is 5V and the low level is 0V. The optocoupler isolation switch U2(5) and optocoupler isolation switch U3(9) are both Pai85 series optocoupler compatible digital isolators purchased from Rongpai Semiconductor, and the withstand voltage of the optocoupler isolation switch U2(5) and optocoupler isolation switch U3(9) is 5KV.

6. A low-power high / low voltage isolated pulse generator according to claim 4, characterized in that: The resistance value of the pulse input current limiting resistor R1(8) is equal to the resistance value of the pulse output current limiting resistor R3(12), and the resistance value range is 1KΩ-10KΩ with an accuracy of 1%. The resistance value range of the optocoupler load resistor R2(4) is 10KΩ-100KΩ with an accuracy of 1%.

7. A low-power high / low voltage isolated pulse generator according to claim 4, characterized in that: The resistance of the pulse charging capacitor C1(11) ranges from 10nF to 100nF, and its withstand voltage is 50V.

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