High-reliability power supply system for accelerator power supply control system

Abstract

The invention discloses a high-reliability power supply system for an accelerator power supply control system, and the system comprises a main power supply module which is connected with the input three-phase AC 380V voltage of an accelerator power supply main loop; the auxiliary power supply module is connected with the input three-phase AC 380V voltage of the accelerator power supply main loop; the power supply intelligent management module is respectively connected with the main power supply module and the auxiliary power supply module; and the DC / DC conversion module is connected with the accelerator power supply control system after being connected with the power supply intelligent management module. According to the invention, uninterrupted continuous power supply of the accelerator power supply control system can be ensured, the reliability of the accelerator power supply is improved, accelerator power supply faults caused by abnormal power supply of the control system are avoided, and long-time stable operation of equipment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of accelerator power supply control systems, and in particular to a high-reliability power supply system for an accelerator power supply control system. Background Art

[0002] The accelerator power supply is a special power supply device designed to provide high voltage, high power and precisely controlled electric energy for particle accelerators. In many fields such as particle physics experiments, medical radiotherapy, materials science, nuclear technology and industrial applications, particle accelerators are crucial equipment, and accelerator power supplies are the core components to ensure the efficient and stable operation of these equipment. At present, accelerator power supplies mostly use digital controllers as their control systems, and the power supply scheme of the control system requires the power supply to have high precision and high reliability. Through the analysis and comparison of the power supply schemes of the accelerator power control system, the existing power supply schemes mostly use a single power supply, that is, either UPS is used to introduce AC power, and then the accelerator power control system is powered by a switching power supply, or the DC bus voltage is directly taken on the rectifier output side, and then the accelerator power control system is powered by a flyback power supply circuit. Both schemes can realize the function of powering the control system, but there are reliability risks. When the UPS or flyback power supply fails, the control system will not work, resulting in failure of the accelerator power supply device, such as endangering the life and health of the treated person in the field of accelerator medical devices or causing irreparable economic losses in industrial applications. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a high-reliability power supply system for an accelerator power supply control system.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows: A high-reliability power supply system for an accelerator power supply control system, comprising: The main power supply module is connected to the accelerator power supply main circuit input three-phase AC380V voltage; The auxiliary power supply module is connected to the accelerator power supply main circuit input three-phase AC380V voltage; The power supply intelligent management module is connected to the main power supply module and the auxiliary power supply module respectively; The DC / DC conversion module is connected to the power supply intelligent management module and then connected to the accelerator power control system.

[0005] The main power supply module comprises: The power filter is connected to the accelerator power main circuit input three-phase AC380V voltage; UPS, connected to the power filter; The AC / DC switching power supply is connected to the UPS and then to the power supply intelligent management module, and a fuse protector is provided between the AC / DC switching power supply and the UPS.

[0006] The power filter and UPS, as well as the UPS and AC / DC switching power supply, are connected through sockets XS1 and XS2 respectively, and XS1 and XS2 are two-hole sockets; the model of the power filter is FLHD53-6A, the model of the UPS is 500VA / 300W TG500, the model of the fuse protector is RS4-1000 / 63-P101NK, and the model of the AC / DC switching power supply is LRS-150-24.

[0007] The auxiliary power supply module comprises: The three-phase rectifier circuit is connected to the accelerator power supply main circuit input three-phase AC380V voltage, and a capacitor group is connected to it in parallel for filtering and energy storage; A DC filter is connected to the three-phase rectifier circuit; The flyback power supply circuit is connected to the DC filter and then to the power supply intelligent management module.

[0008] The three-phase rectifier circuit is an uncontrollable diode rectifier bridge.

[0009] The DC / DC conversion module comprises: URB2424LD-20WR3A2S 24V to 24V power supply, used to supply power to the accelerator power cooling fan and accelerator digital controller respectively; URA2415LD-20WR3A2S, a 24V to ±15V power supply, is used to power the accelerator power drive circuit and the sensor; The URB2505LD-20WR3A2S 24V to 5V power supply is used to power the accelerator digital controller.

[0010] The power supply intelligent management module includes: The voltage collection and conditioning circuit is used to isolate and collect the two 24V voltages sent by the main power supply module and the auxiliary power supply module, and perform corresponding proportional operations; The AD conversion circuit is connected to the voltage acquisition and conditioning circuit to convert the analog signal sent by the voltage acquisition and conditioning circuit into a digital signal; The monitoring and display part is connected with the AD conversion circuit; The MCU controller is connected to the AD conversion circuit to perform control operations and fault diagnosis on the digital signals sent by the AD conversion circuit; The power supply selection circuit is connected to the MCU controller.

[0011] The power supply selection circuit comprises: Relay coil; Fast recovery diode, connected in parallel to the relay coil; Among them, the two sets of contacts of the relay coil are respectively connected to the outputs 1-24VL+ and 1-24L- of the main power supply module, and the outputs 2-24VL+ and 2-24VL- of the auxiliary power supply module.

[0012] The beneficial effects of the present invention are: 1. The main power supply module of the present invention uses an uninterruptible power supply UPS to lead out one phase of the AC input power supply to provide AC input for the subsequent AC / DC switching power supply module, and the AC / DC switching power supply module outputs a 24V DC voltage for powering the accelerator power control system; 2. The auxiliary power supply module of the present invention uses three-phase AC 380V as input, which is used as the input of the flyback power supply after filtering by a three-phase rectifier circuit and a capacitor group. The flyback power supply outputs a 24V DC voltage for powering the accelerator power control system; 3. The power supply intelligent management module of the present invention includes voltage acquisition, AD conversion, monitoring display, operation control, fault diagnosis and power supply selection circuits, which realize automatic or manual switching of two power supplies, that is, judging the operating status of the two power supplies, and when the main power supply circuit is abnormal, it can quickly switch to the backup power supply circuit; 4. The DC / DC conversion module of the present invention has a selected 24V DC voltage as input, and converts the 24V voltage into 5 voltages of different voltage levels through DC / DC modules of various specifications and models for driving the accelerator power supply, the sensor, the cooling fan, and the power supply of the digital controller; 5. The present invention provides a high-reliability main and backup power supply solution, and through intelligent management and control, it can monitor the power supply status of the accelerator power control system in real time online, which can ensure the uninterrupted and continuous power supply of the accelerator power control system, improve the reliability of the accelerator power supply, avoid accelerator power supply failures caused by abnormal power supply of the control system, and ensure that the equipment can operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the principle diagram of the present invention; Figure 2 A circuit schematic diagram of a main power supply module and an auxiliary power supply module of the present invention; Figure 3 This is a schematic diagram of the power supply intelligent management module of the present invention; Figure 4 A circuit schematic diagram of a power supply selection circuit of the present invention; Figure 5 The schematic diagram of the circuit of the DC / DC conversion module of the present invention is shown in FIG. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0015] like Figure 1 As shown, a high-reliability power supply system for an accelerator power control system includes: a main power supply module 1, connected to the three-phase AC380V voltage input of the accelerator power main circuit; an auxiliary power supply module 4, connected to the three-phase AC380V voltage input of the accelerator power main circuit; a power supply intelligent management module 2, connected to the main power supply module 1 and the auxiliary power supply module 4 respectively; a DC / DC conversion module 3, which is connected to the accelerator power control system after being connected to the power supply intelligent management module 2.

[0016] like Figure 1 and Figure 2 As shown, the main power supply module 1 includes: a power filter 13, which is connected to the three-phase AC380V voltage input of the accelerator power main circuit; a UPS11, which is connected to the power filter 13; an AC / DC switching power supply 12, which is connected to the power supply intelligent management module 2 after being connected to the UPS11, and a fuse protector is provided between the AC / DC switching power supply 12 and the UPS11. The power filter 13 and the UPS11, as well as the UPS11 and the AC / DC switching power supply 12, are connected respectively through sockets XS1 and XS2, and XS1 and XS2 are two-hole sockets; the model of the power filter 13 is FLHD53-6A, the model of the UPS11 is 500VA / 300W TG500, the model of the fuse protector is RS4-1000 / 63-P101NK, and the model of the AC / DC switching power supply 12 is LRS-150-24.

[0017] like Figure 1 and Figure 2 As shown, the auxiliary power supply module 4 includes: a three-phase rectifier circuit 42, which is connected to the accelerator power main circuit input three-phase AC380V voltage, and a capacitor group is connected thereto for filtering and energy storage; a DC filter 43, which is connected to the three-phase rectifier circuit 42; a flyback power supply circuit 41, which is connected to the DC filter 43 and then connected to the power supply intelligent management module 2, wherein the three-phase rectifier circuit 42 is an uncontrollable diode rectifier bridge.

[0018] like Figure 1 and Figure 5As shown, the DC / DC conversion module 3 includes: URB2424LD-20WR3A2S32 of 24V to 24V power supply, which is used to supply power to the accelerator power cooling fan and the accelerator digital controller respectively; URA2415LD-20WR3A2S31 of 24V to ±15V power supply, which is used to supply power to the accelerator power drive circuit and the sensor; URB2505LD-20WR3A2S 33 of 24V to 5V power supply, which is used to supply power to the accelerator digital controller.

[0019] like Figure 1 and Figure 3 As shown, the power supply intelligent management module 2 includes: a voltage acquisition and conditioning circuit 23, which is used to isolate and acquire the two 24V voltages sent by the main power supply module 1 and the auxiliary power supply module 4, and perform corresponding proportional operations; an AD conversion circuit 221, which is connected to the voltage acquisition and conditioning circuit 23, and converts the analog signal sent by the voltage acquisition and conditioning circuit 23 into a digital signal; a monitoring and display part 222, which is connected to the AD conversion circuit 221; an MCU controller 223, which is connected to the AD conversion circuit 221, and performs control operations and fault diagnosis on the digital signal sent by the AD conversion circuit 221; and a power supply selection circuit 21, which is connected to the MCU controller 223.

[0020] like Figure 4 As shown, the power supply selection circuit 21 includes: a relay coil 211; a fast recovery diode 212, which is connected in parallel to the relay coil 211; wherein the two sets of contacts of the relay coil 211 are respectively connected to the outputs 1-24VL+ and 1-24L- of the main power supply module 1, and the outputs 2-24VL+ and 2-24VL- of the auxiliary power supply module 4.

[0021] When the present invention is in use, the accelerator power input in this example is a three-phase AC 380V voltage, and the input rectification adopts a three-phase uncontrolled full-bridge rectification, and the control power required by the control system is about 150W.

[0022] The input of the main power supply module 1 is taken from the single-phase 220V AC input of the main circuit as the input of the UPS11 power supply, and then connected to the AC / DC switching power supply 12, with an output power of 150W and a voltage of 24V. The input of the flyback power supply circuit 41 in the auxiliary power supply module 4 directly takes the main circuit rectifier output bus voltage, which is about 540V. The flyback power supply circuit 41 has an output power of 150W and a voltage of 24V. The output power and voltage of the two power supplies can be adjusted by changing the models of the flyback power supply circuit 41 and the AC / DC switching power supply 12 according to actual needs. The power supply intelligent management module 2 samples, AD converts, monitors, displays, calculates and controls, and diagnoses faults on the two power supply voltages. If the operating status of the two power supply voltages is normal, the main power supply module 1 is selected first. When the main power supply module 1 is abnormal, it can automatically and quickly switch to the auxiliary power supply module 4. At the same time, parameters can be set on the human-machine interface or the host computer of the accelerator power supply to manually select the power supply circuit. The power supply of the accelerator power control system requires voltages of multiple voltage levels. In this example, three specifications and models of DC / DC conversion modules 3 are selected to convert the 24V voltage into two ±15V power supplies, which are used to power the accelerator power drive circuit and the sensor respectively, one ±24V and one 5V power supply are used to power the accelerator digital controller, and one 24V power supply is used to power the accelerator power cooling fan.

[0023] The circuit input of the main power supply module 1 is a single-phase voltage randomly selected from the three-phase AC380V voltage input of the accelerator power supply main circuit, which is connected to the input of UPS11 (500VA / 300W TG500) after passing through the power filter 13, and the output of UPS11 is connected to the input of AC / DC switching power supply 12. A fuse protector (RS4-1000 / 63-P101NK) is added between UPS11 and AC / DC switching power supply 12. The output of the main power supply module 1 is the first 24V DC voltage source. The input of the auxiliary power supply module 4 is the three-phase AC380V voltage input of the accelerator power supply main circuit, which is connected to the input of the three-phase rectifier circuit 42 in the auxiliary power supply module 4. The output of the three-phase rectifier circuit 42 is connected to the DC filter 43 after capacitor filtering, and the output of the DC filter 43 is connected to the input of the flyback power supply circuit 41. The output of the auxiliary power supply module 4 is the second 24V DC voltage source.

[0024] The power supply intelligent management module 2 has a first 24V DC voltage source and a second 24V DC voltage source as inputs. The voltage acquisition and conditioning circuit 23 is used to isolate and acquire the two 24V voltages, and perform corresponding proportional operations to condition them into voltage signals that can be input into the AD conversion circuit 221. The AD conversion circuit 221 converts the analog signal into a digital signal, which enters the MCU controller 223 for control operations, fault diagnosis, and monitoring and display. The control signal is output to the power supply selection circuit 21 according to the status of the two voltage sources. The output of the power supply intelligent management module 2 is a 24V DC voltage source.

[0025] The power supply selection circuit 21 adopts a fast response 24V DC relay as a power supply selection device. A fast recovery diode 212 is connected in parallel to the relay coil 211 for freewheeling. Two sets of contacts are respectively connected to the outputs 1-24VL+ and 1-24L- of the main power supply module 1, and the outputs 2-24VL+ and 2-24VL- of the auxiliary power supply module 4. When the MCU controller 223 determines that the output control signal Q0.1 is at a low level, the relay coil 211 is de-energized, the relay does not operate, and the main power supply module 1 outputs 1-24VL+ and 1-24VL-; when the output control signal Q0.1 is at a high level, the relay coil 211 is energized, the relay operates, and the auxiliary power supply module 4 outputs 2-24VL+ and 2-24VL- to achieve power supply switching.

[0026] DC / DC conversion module 3, select three specifications and models of DC / DC power supply modules according to the power supply requirements of the accelerator power control system, convert the 24V voltage into 2 ±15V power supplies, which are used for the accelerator power drive circuit power supply and sensor power supply respectively, 1 24V power supply is used for the accelerator power cooling fan power supply, 1 ±24V and 1 5V power supplies are used for the accelerator digital controller power supply. It should be noted here that the accelerator power digital controller can convert the ±24V power supply into the ±15V voltage required by chips such as op amps according to different control chips, and convert the 5V power supply into 3.3V and 1.9V voltages.

[0027] The auxiliary power supply module 4 has an input of a three-phase AC380V voltage inputted into the main circuit of the accelerator power supply, which is connected to the input of a three-phase rectifier circuit 42 in the auxiliary power supply module 4. The output of the three-phase rectifier circuit 42 is connected to a DC filter 43 after capacitor filtering. The output of the DC filter 43 is connected to the input of a flyback power supply circuit 41. The output of the auxiliary power supply module 4 is a second 24V DC voltage source.

[0028] The DC / DC conversion module 3 has a selected 24V DC voltage as input, and converts the 24V voltage into 5 voltages of different voltage levels through DC / DC modules of various specifications and models for driving the accelerator power supply, sensors, cooling fans, and powering the digital controller.

[0029] The three-phase rectifier circuit 42 in the auxiliary power supply module 4 is an uncontrollable diode rectifier bridge, the model of which is determined according to the output voltage and current of the accelerator power supply. The model of the filter energy storage capacitor C1 is determined by the output voltage ripple index and load characteristics of the accelerator power supply. The output of the three-phase rectifier circuit 42 is a 540V DC voltage. The DC filter 43 includes a thermistor, a varistor, a common-mode inductor, an X capacitor, a Y capacitor, etc. The flyback power supply circuit 41 includes a MOSFET, a high-frequency transformer, a single-ended flyback power supply control chip, etc. The capacity is designed to be 150W and the output voltage is 24V.

[0030] The voltage acquisition and conditioning circuit 23 in the power supply intelligent management module 2 is composed of an optocoupler, a resistor, a capacitor and an operational amplifier. AD conversion, control operation and fault diagnosis are implemented in the MCU controller 223. The MCU controller 223 can be a conventional single-chip microcomputer to achieve the required functions. The monitoring display can send the voltage information to the LCD display module of the accelerator power supply or the host computer through communication for real-time display. The power supply selection circuit 21 is composed of a relay with 2 sets of normally open contacts, and the coil voltage is 24V.

[0031] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A high reliability power supply system for an accelerator power control system, characterized in that: include: The main power supply module (1) is connected to the accelerator power supply main circuit input three-phase AC380V voltage; The auxiliary power supply module (4) is connected to the accelerator power supply main circuit input three-phase AC380V voltage; The power supply intelligent management module (2) is connected to the main power supply module (1) and the auxiliary power supply module (4) respectively; The DC / DC conversion module (3) is connected to the power supply intelligent management module (2) and then connected to the accelerator power supply control system.

2. The high reliability power supply system for an accelerator power control system according to claim 1, characterized in that: The main power supply module (1) comprises: A power filter (13) is connected to the accelerator power main circuit input three-phase AC380V voltage; UPS (11), connected to a power filter (13); The AC / DC switching power supply (12) is connected to the UPS (11) and then connected to the power supply intelligent management module (2), and a fuse protector is provided between the AC / DC switching power supply (12) and the UPS (11).

3. The high reliability power supply system for an accelerator power control system according to claim 2, characterized in that: The power filter (13) and the UPS (11) as well as the UPS (11) and the AC / DC switching power supply (12) are connected via sockets XS1 and XS2, respectively, and XS1 and XS2 are two-hole sockets; the model of the power filter (13) is FLHD53-6A, the model of the UPS (11) is 500VA / 300W TG500, the model of the fuse protector is RS4-1000 / 63-P101NK, and the model of the AC / DC switching power supply (12) is LRS-150-24.

4. The high reliability power supply system for an accelerator power control system according to claim 1, characterized in that: The auxiliary power supply module (4) comprises: A three-phase rectifier circuit (42) is connected to the accelerator power supply main circuit input three-phase AC380V voltage, and a capacitor group is connected in parallel to it for filtering and energy storage; A DC filter (43) connected to the three-phase rectifier circuit (42); The flyback power supply circuit (41) is connected to the DC filter (43) and then connected to the power supply intelligent management module (2).

5. The high reliability power supply system for an accelerator power control system according to claim 4, characterized in that: The three-phase rectifier circuit (42) is an uncontrollable diode rectifier bridge.

6. The high reliability power supply system for an accelerator power control system according to claim 1, characterized in that: The DC / DC conversion module (3) comprises: URB2424LD-20WR3A2S (32) of 24V to 24V power supply, used to supply power to the accelerator power cooling fan and the accelerator digital controller respectively; URA2415LD-20WR3A2S (31) for 24V to ±15V power supply, used to power the accelerator power drive circuit and the sensor; The 24V to 5V power supply URB2505LD-20WR3A2S (33) is used to power the accelerator digital controller.

7. The high reliability power supply system for an accelerator power control system according to claim 1, characterized in that: The power supply intelligent management module (2) comprises: A voltage collection and conditioning circuit (23) is used to isolate and collect two 24V voltages sent by the main power supply module (1) and the auxiliary power supply module (4), and perform corresponding proportional operations; The AD conversion circuit (221) is connected to the voltage acquisition and conditioning circuit (23) to convert the analog signal sent by the voltage acquisition and conditioning circuit (23) into a digital signal; A monitoring and display part (222) connected to the AD conversion circuit (221); The MCU controller (223) is connected to the AD conversion circuit (221) and performs control operations and fault diagnosis on the digital signal sent by the AD conversion circuit (221); The power supply selection circuit (21) is connected to the MCU controller (223).

8. The high reliability power supply system for an accelerator power control system according to claim 7, characterized in that: The power supply selection circuit (21) comprises: RELAY COIL (211); A fast recovery diode (212) is connected in parallel to the relay coil (211); The two sets of contacts of the relay coil (211) are respectively connected to the outputs 1-24VL+ and 1-24L- of the main power supply module (1), and the outputs 2-24VL+ and 2-24VL- of the auxiliary power supply module (4).

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