High-power electrical fast transient burst immunity coupling device and detection equipment

Abstract

The invention discloses a high-power electrical fast transient burst immunity coupling device and detection equipment, the coupling device comprises a signal injection module, a signal coupling module and a signal shielding cable, the signal injection module is connected with the signal coupling module, and the signal shielding cable is connected with the signal coupling module. The signal injection module is used for receiving an interference signal and injecting the interference signal into the signal coupling module, the signal coupling module comprises a phase-change switch unit, a coupling capacitor unit and a coupling port unit, and the phase-change switch unit is arranged at the interference signal injection end of the signal coupling module; the signal shielding cable is arranged between the signal injection module and the coupling port unit. The coupling device can effectively inject 2KV high-voltage fast transient pulse interference signals into a main power line, solves the problem that large medical equipment cannot be effectively tested due to the fact that the power of a traditional coupling device is too small, and meets the requirements of the large medical equipment detection market.

Description

Technical Field

[0001] The present invention belongs to the technical field of large medical equipment detection, and in particular relates to a high-power electrical fast transient pulse group immunity coupling device and detection equipment. Background Art

[0002] The purpose of the electrical fast transient burst immunity test is to verify the immunity of electrical and electronic equipment to various types of transient disturbances such as those from switching transient processes (cutting off inductive loads, relay contact bounce, etc.).

[0003] High-end medical equipment will be a key area of future development for the medical device industry. Traditional large-scale medical equipment includes X-ray machines, CT machines, MRI machines, and PET-CT machines. In recent years, proton and heavy ion equipment and image-guided precision radiotherapy equipment have seen rapid development. These devices are technologically complex and bulky, with some subsystems exceeding 600kVA. Traditional detection devices generally consume no more than 70kVA, making them inadequate for actual on-site testing requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-power electrical fast transient pulse group immunity coupling device and detection equipment, which can effectively inject 2KV high-voltage electrical fast transient pulse interference signals into the main power line, solving the technical problem that traditional coupling devices have too low power to be effectively tested.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention provides a high-power electrical fast transient pulse group immunity coupling device, comprising a signal injection module, a signal coupling module and a signal shielding cable;

[0007] The signal injection module is connected to the signal coupling module, and the signal injection module is used to receive the interference signal and inject the interference signal into the signal coupling module;

[0008] The signal coupling module includes a phase-changing switch unit, a coupling capacitor unit and a coupling port unit, and the phase-changing switch unit is arranged at the interference signal injection end of the signal coupling module;

[0009] The signal shielding cable is arranged between the signal injection module and the coupling port unit.

[0010] In one embodiment of the present invention, the input end of the phase-changing switch unit is connected to the output end of the signal injection module, the input end of the coupling capacitor unit is connected to the output end of the phase-changing switch unit, the input end of the coupling port unit is connected to the output end of the coupling capacitor unit, and the output end of the coupling port unit is connected to the test device.

[0011] In one embodiment of the present invention, the phase-changing switch unit includes a first phase-changing switch, a second phase-changing switch, a third phase-changing switch, a fourth phase-changing switch and a fifth phase-changing switch;

[0012] The first ends of the first phase-changing switch, the second phase-changing switch, the third phase-changing switch, the fourth phase-changing switch and the fifth phase-changing switch are connected to each other as the input end of the phase-changing switch unit and connected to the output end of the signal injection module;

[0013] The second ends of the first phase-changing switch, the second phase-changing switch, the third phase-changing switch, the fourth phase-changing switch and the fifth phase-changing switch are respectively connected to the input end of the coupling capacitor unit as the first output end, the second output end, the third output end, the fourth output end and the fifth output end of the phase-changing switch unit.

[0014] In one embodiment of the present invention, the coupling capacitor unit includes a first coupling capacitor, a second coupling capacitor, a third coupling capacitor, a fourth coupling capacitor and a fifth coupling capacitor;

[0015] The first ends of the first coupling capacitor, the second coupling capacitor, the third coupling capacitor, the fourth coupling capacitor and the fifth coupling capacitor are respectively connected to the output end of the phase-changing switch unit as the first input end, the second input end, the third input end, the fourth input end and the fifth input end of the coupling capacitor unit;

[0016] The second ends of the first coupling capacitor, the second coupling capacitor, the third coupling capacitor, the fourth coupling capacitor and the fifth coupling capacitor are respectively connected to the input end of the coupling port unit as the first output end, the second output end, the third output end, the fourth output end and the fifth output end of the coupling capacitor unit.

[0017] In one embodiment of the present invention, the coupling capacitor is capable of withstanding a continuous impact of high-voltage electrical fast transient pulses greater than 2KV.

[0018] In one embodiment of the present invention, the coupling port unit includes a first coupling port, a second coupling port, a third coupling port, a fourth coupling port and a fifth coupling port;

[0019] The first ends of the first coupling port, the second coupling port, the third coupling port, the fourth coupling port and the fifth coupling port are respectively connected to the output end of the coupling capacitor unit as the first input end, the second input end, the third input end, the fourth input end and the fifth input end of the coupling port unit;

[0020] The second ends of the first coupling port, the second coupling port, the third coupling port, the fourth coupling port, and the fifth coupling port are respectively connected to the device under test.

[0021] In one embodiment of the present invention, the coupling port comprises a flat alligator clip.

[0022] In one embodiment of the present invention, the length of the signal shielding cable from the signal injection module to the coupling capacitor unit does not exceed 10 cm, and the length of the signal shielding cable from the coupling capacitor unit to the coupling port unit does not exceed 5 cm.

[0023] In one embodiment of the present invention, the peak current carrying capacity of the signal shielded cable is greater than 200A.

[0024] Based on the same inventive concept, another embodiment of the present invention further provides a high-power electrical fast transient pulse group immunity detection device, including a power supply device, an electrical fast transient pulse group generator, a control device, and a high-power electrical fast transient pulse group immunity coupling device as described in any of the above embodiments.

[0025] As described above, the present invention provides a high-power electrical fast transient pulse group immunity coupling device, which has the following beneficial effects: the coupling device includes a signal injection module, a signal coupling module and a signal shielding cable, the signal injection module is connected to the signal coupling module, the signal injection module is used to receive an interference signal and inject the interference signal into the signal coupling module, the signal coupling module includes a phase-changing switch unit, a coupling capacitor unit and a coupling port unit, the phase-changing switch unit is arranged at the interference signal injection end of the signal coupling module, and the signal shielding cable is arranged between the signal injection module and the coupling port unit. The coupling device can effectively solve the problem that large medical equipment cannot be effectively tested because the power of traditional coupling devices is too low, and is suitable for the needs of the large medical equipment testing market, especially proton and heavy ion large medical equipment. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a structural block diagram of a high-power electrical fast transient pulse group immunity coupling device provided by an exemplary embodiment of the present application.

[0028] Figure 2 A circuit diagram of a high-power electrical fast transient pulse group immunity coupling device provided by an exemplary embodiment of the present application.

[0029] Figure 3 A partial circuit diagram of a high-power electrical fast transient pulse group immunity coupling device provided by an exemplary embodiment of the present application.

[0030] 100 Signal Injection Module

[0031] 200 signal coupling module

[0032] 300 Test Equipment

[0033] 201 phase-changing switch unit

[0034] 202 coupling capacitor unit

[0035] 203 coupled port unit DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0037] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0038] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0039] In order to solve the technical problem that traditional coupling devices are too low-power to be effectively tested, the present invention provides a high-power electrical fast transient pulse group immunity coupling device, which can effectively inject 2KV electrical fast transient pulse interference signals into the main power line, while preventing the large current of the network power supply from being fed back to the interference signal host, without affecting the upper network power circuit, thus avoiding impact on the network power supply. Figure 1 As shown, the coupling device includes a signal injection module 100, a signal coupling module 200, and a signal shielded cable. The signal injection module 100 is connected to the signal coupling module 200. The signal injection module 100 is used to receive an interference signal and inject the interference signal into the signal coupling module 200. The signal coupling module 200 includes a phase-changing switch unit 201, a coupling capacitor unit 202, and a coupling port unit 203. The phase-changing switch unit 201 is provided at the interference signal injection end of the signal coupling module 200. The signal shielded cable is provided between the signal injection module 100 and the coupling port unit 203. These embodiments will be discussed in detail below.

[0040] It should be noted that, in an exemplary embodiment of the present application, the housing of the coupling device must be grounded to prevent electric shock accidents caused by a leakage fault in the coupling device. Furthermore, in this embodiment, the power supply system of the device under test 300 utilizes a three-phase five-wire system. Of course, in other embodiments, the power supply system of the device under test 300 may also utilize a three-phase four-wire system depending on the actual application requirements.

[0041] In an exemplary embodiment of this application, please continue to refer to Figure 1 As shown, the input end of the phase-changing switch unit 201 is connected to the output end of the signal injection module 100, the input end of the coupling capacitor unit 202 is connected to the output end of the phase-changing switch unit 201, the input end of the coupling port unit 203 is connected to the output end of the coupling capacitor unit 202, and the output end of the coupling port unit 203 is connected to the test device 300.

[0042] For details, please refer to Figure 2 and Figure 3 As shown, Figure 2 and Figure 3The specific circuit diagram of the coupling device is shown. The phase-changing switch unit 201 includes a first phase-changing switch SW1, a second phase-changing switch SW2, a third phase-changing switch SW3, a fourth phase-changing switch SW4 and a fifth phase-changing switch SW5. It should be noted that in this embodiment, since the power supply system of the test device 300 adopts a three-phase five-wire system, the phase-changing switch unit 201 is correspondingly provided with five phase-changing switches. Of course, in other embodiments, if the power supply system of the test device 300 adopts a three-phase four-wire system, the phase-changing switch unit 201 only needs to be provided with four phase-changing switches. In other words, the number of phase-changing switches provided in the phase-changing switch unit 201 can be adaptively adjusted according to actual application requirements.

[0043] The first ends of the first phase-changing switch SW1, the second phase-changing switch SW2, the third phase-changing switch SW3, the fourth phase-changing switch SW4, and the fifth phase-changing switch SW5 are connected to each other and serve as the input end of the phase-changing switch unit 201 and are connected to the output end of the signal injection module 100. The second ends of the first phase-changing switch SW1, the second phase-changing switch SW2, the third phase-changing switch SW3, the fourth phase-changing switch SW4, and the fifth phase-changing switch SW5 serve as the first output end, the second output end, the third output end, the fourth output end, and the fifth output end of the phase-changing switch unit 201, respectively, and are connected to the input end of the coupling capacitor unit 202.

[0044] It should be noted that in this embodiment, the phase-changing switches are classified as air-type and vacuum-type based on the arc-extinguishing medium. The air-type switches are further classified as knife-type, rotary-type, and snap-action types. When the phase-changing switch is triggered, its internal mechanism rotates or moves, thereby changing the state of the contacts to connect or disconnect the circuit.

[0045] In an exemplary embodiment of the present application, the coupling capacitor unit 202 includes a first coupling capacitor C1, a second coupling capacitor C2, a third coupling capacitor C3, a fourth coupling capacitor C4, and a fifth coupling capacitor C5. It should be noted that in this embodiment, since the power supply system of the test device 300 adopts a three-phase five-wire system, the coupling capacitor unit 202 is provided with five coupling capacitors. Of course, in other embodiments, if the power supply system of the test device 300 adopts a three-phase four-wire system, the coupling capacitor unit 202 only needs to be provided with four coupling capacitors. In other words, the number of coupling capacitors provided in the coupling capacitor unit 202 can be adaptively adjusted according to actual application requirements.

[0046] The first ends of the first coupling capacitor C1, the second coupling capacitor C2, the third coupling capacitor C3, the fourth coupling capacitor C4, and the fifth coupling capacitor C5 respectively serve as the first input, second input, third input, fourth input, and fifth input of the coupling capacitor unit 202, and are connected to the first output, second output, third output, fourth output, and fifth output of the commutation switch unit 201. The second ends of the first coupling capacitor C1, the second coupling capacitor C2, the third coupling capacitor C3, the fourth coupling capacitor C4, and the fifth coupling capacitor C5 respectively serve as the first output, second output, third output, fourth output, and fifth output of the coupling capacitor unit 202, and are connected to the input of the coupling port unit 203.

[0047] It should be noted that the coupling capacitor in the coupling capacitor unit 202 is a customized high-voltage coupling capacitor, which can withstand a continuous impact of high-voltage electrical fast transient pulses greater than 2KV, ensuring that the signal is injected into the main power line without distortion and without reducing the amplitude, and can withstand the large current fed back by the test device 300. The coupling capacitor superimposes the interference signal on the main power line voltage signal by coupling, while isolating the voltage signal from affecting the host generating the interference signal. It is worth noting that in this embodiment, the material of the coupling capacitor can be a ceramic capacitor. Of course, in other embodiments, the coupling capacitor can also use other capacitors of different materials that are resistant to high voltage and meet the actual application requirements. In addition, in this embodiment, the phase-changing switch unit 201 is arranged at the interference signal injection end of the signal coupling module 200. In other words, the high-voltage fast transient pulse interference signal output by the signal injection module 100 is first injected into the main power line through the phase-changing switch unit 201 and then through the coupling capacitor unit 202 to ensure the electrical insulation distance during phase-changing, thereby preventing arcing during phase-changing and preventing the large current of the test device 300 from being fed back into the interference signal host and injuring the host and the operator. In addition, the phase-changing switch unit 201 is connected in series before the coupling capacitor unit 202, which can also effectively protect the phase-changing switch in the phase-changing switch unit 201. When any one of the phase-changing switches in the phase-changing switch unit 201 is in a closed state, the coupling capacitor in the corresponding series-connected coupling capacitor unit 202 can isolate the phase-changing switch, preventing the test device 300 from feeding back a large current through the phase-changing switch, thereby extending the service life of the phase-changing switch.

[0048] In an exemplary embodiment of the present application, the coupling port unit 203 includes a first coupling port, a second coupling port, a third coupling port, a fourth coupling port, and a fifth coupling port. In this embodiment, the first coupling port is a phase A coupling port, the second coupling port is a phase B coupling port, the third coupling port is a phase C coupling port, the fourth coupling port is a working neutral line (N line) coupling port, and the fifth coupling port is a protective neutral line (PE line) coupling port.

[0049] It should be noted that the coupling port of the coupling port unit 203 is in contact with the main power line, so Figure 1 Although not explicitly shown in the figure, it is understandable that the coupling port also needs to be able to withstand the large current feedback impact of the device under test 300.

[0050] The first ends of the first coupling port, the second coupling port, the third coupling port, the fourth coupling port, and the fifth coupling port respectively serve as the first input end, the second input end, the third input end, the fourth input end, and the fifth input end of the coupling port unit and are correspondingly connected to the first output end, the second output end, the third output end, the fourth output end, and the fifth output end of the coupling capacitor unit, and the second ends of the first coupling port, the second coupling port, the third coupling port, the fourth coupling port, and the fifth coupling port are respectively connected to the test device 300.

[0051] In an exemplary embodiment of the present application, the coupling port of the coupling port unit 203 includes a flat alligator clip to maximize the contact area of the coupling port and ensure reliability. Of course, in other embodiments, the coupling port unit 203 may also utilize other types of coupling ports, as long as the coupling port can withstand the impact of the high current feedback of 200A from the device under test and the contact area is maximized and reliable.

[0052] In an exemplary embodiment of the present application, the signal shielding cable (not shown) is arranged between the signal injection module 100 and the coupling port unit 203. It should be noted that the length of the signal shielding cable from the signal injection module 100 to the coupling capacitor unit 202 does not exceed 10 cm, and the length of the signal shielding cable from the coupling capacitor unit 202 to the coupling port unit 203 does not exceed 5 cm. During tooling production, the length of the signal shielding cable can be adjusted by oscilloscope detection to reduce the attenuation of high-voltage fast transient pulse interference signals. It is worth noting that the peak current carrying capacity of the signal shielding cable is greater than 200A, that is, the signal shielding cable needs to be able to withstand the 200A high current feedback impact of the test equipment.

[0053] Based on the same inventive concept, another embodiment of the present invention further provides a high-power electrical fast transient pulse group immunity detection device, which includes a power supply device, an electrical fast transient pulse group generator, a control device, and a high-power electrical fast transient pulse group immunity coupling device as described in any of the above embodiments.

[0054] It should be noted that the power supply device is used to power the detection equipment, the electrical fast transient pulse group generator is used to generate a high-voltage electrical fast transient pulse interference signal, and the control device is used to control the entire detection process, including the start, stop, and parameter setting of the pulse group generator.

[0055] In summary, the present invention provides a high-power electrical fast transient pulse group immunity coupling device for coupling the interference signal generated by the pulse group generator to the corresponding port of the test device 300, and ensuring the stability and accuracy of the interference signal during transmission. The coupling device includes a signal injection module 100, a signal coupling module 200 and a signal shielding cable. The signal injection module 100 is connected to the signal coupling module 200. The signal injection module 100 is used to receive the interference signal and inject the interference signal into the signal coupling module 200. The signal coupling module 200 includes a phase-changing switch unit 201, a coupling capacitor unit 202 and a coupling port unit 203. The phase-changing switch unit 201 is arranged at the interference signal injection end of the signal coupling module 200, and the signal shielding cable is arranged between the signal injection module 100 and the coupling port unit 203. The coupling device can effectively inject a 2KV high-voltage electrical fast transient pulse interference signal into the main power line, and can also prevent the large current of the network power supply from being fed back to the host generating the interference signal without affecting the upper network power circuit, thereby avoiding impact on the network power supply. The signal injection module 100 injects a high-voltage electrical fast transient pulse interference signal into the signal coupling module 200, while preventing high current from the device under test 300 from feeding back to the interference signal generating host. The coupling capacitor is a custom high-voltage coupling capacitor designed to withstand the continuous impact of a 2KV high-voltage electrical fast transient pulse group and the long-term operation of the high current feedback from the device under test 300. The phase-changing switch unit 201 is located at the interference signal injection end of the signal coupling module 200 to ensure electrical insulation distance during phase change, thereby preventing arcing during phase change. The signal shielded cable can withstand the impact of 200A feedback current from the device under test and is kept as short as possible to reduce the attenuation of the high-voltage electrical fast transient pulse interference signal. The coupling port contact area is as large and reliable as possible and can withstand the impact of 200A high current feedback from the device under test. This high-power electrical fast transient pulse group coupling device can effectively solve the problem of large medical equipment being unable to be effectively tested due to the low power of traditional coupling and decoupling devices. With a maximum current of 200A, it is suitable for the needs of the large medical equipment testing market.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A high-power electrical fast transient pulse group immunity coupling device, characterized in that: Including signal injection module, signal coupling module and signal shielding cable; The signal injection module is connected to the signal coupling module, and the signal injection module is used to receive the interference signal and inject the interference signal into the signal coupling module; The signal coupling module includes a phase-changing switch unit, a coupling capacitor unit and a coupling port unit, and the phase-changing switch unit is arranged at the interference signal injection end of the signal coupling module; The signal shielding cable is arranged between the signal injection module and the coupling port unit.

2. The high-power electrical fast transient pulse group immunity coupling device according to claim 1 is characterized in that: The input end of the phase-changing switch unit is connected to the output end of the signal injection module, the input end of the coupling capacitor unit is connected to the output end of the phase-changing switch unit, the input end of the coupling port unit is connected to the output end of the coupling capacitor unit, and the output end of the coupling port unit is connected to the device under test.

3. The high-power electrical fast transient pulse group immunity coupling device according to claim 2 is characterized in that: The phase-changing switch unit includes a first phase-changing switch, a second phase-changing switch, a third phase-changing switch, a fourth phase-changing switch and a fifth phase-changing switch; The first ends of the first phase-changing switch, the second phase-changing switch, the third phase-changing switch, the fourth phase-changing switch and the fifth phase-changing switch are connected to each other as the input end of the phase-changing switch unit and connected to the output end of the signal injection module; The second ends of the first phase-changing switch, the second phase-changing switch, the third phase-changing switch, the fourth phase-changing switch and the fifth phase-changing switch are respectively connected to the input end of the coupling capacitor unit as the first output end, the second output end, the third output end, the fourth output end and the fifth output end of the phase-changing switch unit.

4. The high-power electrical fast transient pulse group immunity coupling device according to claim 2 is characterized in that: The coupling capacitor unit includes a first coupling capacitor, a second coupling capacitor, a third coupling capacitor, a fourth coupling capacitor and a fifth coupling capacitor; The first ends of the first coupling capacitor, the second coupling capacitor, the third coupling capacitor, the fourth coupling capacitor and the fifth coupling capacitor are respectively connected to the output end of the phase-changing switch unit as the first input end, the second input end, the third input end, the fourth input end and the fifth input end of the coupling capacitor unit; The second ends of the first coupling capacitor, the second coupling capacitor, the third coupling capacitor, the fourth coupling capacitor and the fifth coupling capacitor are respectively connected to the input end of the coupling port unit as the first output end, the second output end, the third output end, the fourth output end and the fifth output end of the coupling capacitor unit.

5. The high-power electrical fast transient pulse group immunity coupling device according to claim 4 is characterized in that: The coupling capacitor can withstand a continuous impact of high-voltage fast transient pulses greater than 2KV.

6. The high-power electrical fast transient pulse group immunity coupling device according to claim 2 is characterized in that: The coupling port unit includes a first coupling port, a second coupling port, a third coupling port, a fourth coupling port and a fifth coupling port; The first ends of the first coupling port, the second coupling port, the third coupling port, the fourth coupling port and the fifth coupling port are respectively connected to the output end of the coupling capacitor unit as the first input end, the second input end, the third input end, the fourth input end and the fifth input end of the coupling port unit; The second ends of the first coupling port, the second coupling port, the third coupling port, the fourth coupling port, and the fifth coupling port are respectively connected to the device under test.

7. The high-power electrical fast transient pulse group immunity coupling device according to claim 6, characterized in that: The coupling port includes a flat alligator clip.

8. The high-power electrical fast transient pulse group immunity coupling device according to claim 1 is characterized in that: The length of the signal shielding cable from the signal injection module to the coupling capacitor unit is no more than 10 centimeters, and the length of the signal shielding cable from the coupling capacitor unit to the coupling port unit is no more than 5 centimeters.

9. The high-power electrical fast transient pulse group immunity coupling device according to claim 1 is characterized in that: The peak current carrying capacity of the signal shielded cable is greater than 200A.

10. A high-power electrical fast transient pulse group immunity detection device, characterized in that: The invention comprises a power supply device, an electrical fast transient pulse group generator, a control device and a high-power electrical fast transient pulse group immunity coupling device as claimed in any one of claims 1 to 9.

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