Power distribution module and equipment
The transformer module converts three-phase AC power into single-phase AC power and grounds it to generate a reference voltage, solving the problem that three-phase power cannot be directly supplied to single-phase equipment, thus achieving stable operation of the equipment and suppression of electromagnetic interference.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-31
AI Technical Summary
In existing technologies, three-phase AC power cannot directly power single-phase AC equipment, and the conversion process of the step-up transformer generates electromagnetic interference and poses a high risk of grounding, leading to unstable operation of the equipment.
The three-phase AC power is converted into single-phase AC power through a transformer module, and a reference voltage grounded single-phase AC power is generated through grounding. An E-type transformer is used to suppress power-on surges, and combined with an overheat protection module and an operation indicator module, the equipment is ensured to operate stably.
It achieves stable power supply of single-phase AC, reduces electromagnetic interference and grounding risks, and improves the operational stability and reliability of the equipment.
Smart Images
Figure CN224068549U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of semiconductor technology, and in particular to a power distribution module and device. Background Technology
[0002] Currently, with the development of the semiconductor chip industry, chip applications are becoming increasingly widespread across various industries. Electronic devices related to chip design and manufacturing require single-phase alternating current for power during operation.
[0003] However, for manufacturing plants that can only provide conventional three-phase power, their three-phase power supply cannot directly power electronic equipment that requires single-phase power. Therefore, how to convert the three-phase AC power provided by the plant into the single-phase AC power required by electronic equipment, and ensure that the electronic equipment can operate stably under single-phase AC power supply, has become an urgent technical problem to be solved. Utility Model Content
[0004] This application provides a power distribution module and equipment that can improve the technical problem that the three-phase AC power supplied by the power supply end cannot drive the stable operation of single-phase AC equipment.
[0005] In a first aspect, embodiments of this application provide a power distribution module, the power distribution module comprising:
[0006] Input interface for connecting to the three-phase power supply terminal of an external power source;
[0007] The transformer module has two input terminals connected to two input pins of the input interface. The transformer module is used to convert two phases of three-phase AC power into single-phase AC power and to isolate three-phase AC power from single-phase AC power.
[0008] The output interface has two output pins that are connected to the two output terminals of the transformer module, and one of the two output terminals of the transformer module is grounded; the output interface is used to connect to an external power receiving module.
[0009] Optionally, the first and second pins of the input interface are used to connect to two phases of the three-phase power supply, respectively, and the third pin of the input interface is used to ground.
[0010] The first and second pins of the output interface are used to electrically connect to the two power supply terminals of the external powered module, respectively, and the third pin of the output interface is electrically connected to the third pin of the input interface.
[0011] Optionally, the first input terminal and the second input terminal of the transformer module are respectively connected to the first pin and the second pin of the input interface, and the first output terminal and the second output terminal of the transformer module are respectively connected to the first pin and the second pin of the output interface.
[0012] The third pin of the input interface is connected to either the first output or the second output of the transformer module.
[0013] Optionally, the transformer module includes an E-type transformer.
[0014] Optionally, the power distribution module also includes:
[0015] The overheat protection module includes a temperature sensor for detecting the operating temperature of the transformer module. The overheat protection module is used to disconnect the electrical connection between the transformer module and the output interface when an overheating abnormality is detected in the transformer module.
[0016] Optionally, the temperature sensor includes a thermal switch; the overheat protection module also includes:
[0017] An AC contactor, whose coil is connected in series with a thermal switch, has its main contacts connected between the transformer module and the output interface. The AC contactor is used to disconnect the electrical connection between the transformer module and the output interface in the event that the thermal switch overheats and trips.
[0018] Optionally, the power distribution module also includes:
[0019] The switching power supply module has its AC input terminal connected to two input pins of the input interface, and its DC output terminal connected in series with an AC contactor and a thermal switch. The switching power supply module is used to convert two phases of a three-phase AC power supply into a DC power supply voltage.
[0020] Optionally, the power distribution module also includes:
[0021] The operation indicator module is electrically connected to the output interface via its AC power supply terminal. The operation indicator module is used to generate an operation indicator signal when the output interface provides single-phase AC power.
[0022] Optionally, the operation indicator module includes an operation indicator light connected between a first pin and a second pin of the output interface, the operation indicator light being used to illuminate when the output interface is supplied with single-phase AC power.
[0023] Secondly, embodiments of this application provide a power distribution device, which includes a cabinet and at least one power distribution module as described in the first aspect, wherein the power distribution module is detachably connected to the cabinet.
[0024] Compared with related technologies, the power distribution module and equipment provided in this application can convert two phases of the input three-phase AC power into single-phase AC power through a transformer module, and provide single-phase power to the external receiving module through the output interface. Since none of the three-phase AC power phases can be grounded, after the transformer module converts two phases of the three-phase AC power into single-phase AC power, one of the two output terminals can be grounded to generate a single-phase AC voltage with a reference voltage grounded. Compared with the conversion method of the step-up transformer, the above implementation can avoid the electromagnetic interference generated by the step-up transformer during operation of the output single-phase AC power. The isolation function of the transformer module can also filter out high-frequency components of the three-phase AC power, such as interference and noise, thereby improving the stability and reliability of the AC power. Furthermore, by grounding one phase of the output single-phase AC power, a single-phase power with a reference voltage of 0 can be generated, reducing the risk of triggering the zero-ground protection due to an excessively high reference voltage relative to ground in the single-phase power, thus enabling the external receiving module to operate stably under single-phase AC power supply. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the module structure of a power distribution module provided in one embodiment of this application;
[0027] Figure 2 This is a schematic diagram of the module structure of a power distribution module provided in another embodiment of this application;
[0028] Figure 3 This is a schematic diagram of the circuit structure of a power distribution module provided in an embodiment of this application;
[0029] Figure 4 This is a schematic diagram of the circuit structure of a power distribution module provided in another embodiment of this application;
[0030] Figure 5 This is a schematic diagram of the structure of a power distribution device provided in an embodiment of this application.
[0031] In the attached image:
[0032] 100. Power distribution module; 200. Cabinet; 10. Input interface; 20. Transformer module; 30. Output interface; 40. External power supply; 50. External power receiving module; SW. Thermal switch; KM1. AC contactor; PS1. Switching power supply module; 60. Operation indicator module; HL1. Operation indicator light. Detailed Implementation
[0033] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.
[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.
[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The embodiments will now be described in detail with reference to the accompanying drawings.
[0036] Currently, with the development of the semiconductor chip industry, chip applications are becoming increasingly widespread across various industries. Electronic devices related to chip design and manufacturing require single-phase alternating current for power during operation.
[0037] For manufacturing plants that can only provide conventional three-phase power, their three-phase power supply cannot directly power electronic equipment that requires single-phase power. Therefore, in order to provide the single-phase AC power required by the electronic equipment, the three-phase AC power supplied by the power supply end needs to be converted into single-phase AC power before powering the electronic equipment.
[0038] However, taking the 208VAC three-phase AC power supplied by the plant as an example, if a step-up transformer is used to convert the three-phase power to single-phase power, the input wire diameter of the transformer will be too thick due to the power supply requirements, increasing cable costs. Furthermore, the significant electromagnetic interference generated by the step-up transformer during the electro-magnetic conversion will affect the measurements of other high-precision equipment and the AC waveform at the output of the transformer. Moreover, since none of the three-phase AC power from the plant can be grounded, a large voltage difference between the converted single-phase power and the ground wire will trigger the neutral-to-ground protection of equipment, preventing it from continuing to operate and potentially causing damage. Therefore, how to convert the three-phase AC power supplied by the plant into the single-phase AC power required by electronic equipment, and ensure the stable operation of the electronic equipment under single-phase AC power supply without triggering neutral-to-ground protection, has become an urgent technical problem to be solved.
[0039] To address the aforementioned technical problems, embodiments of this application provide a power distribution module and equipment. The power distribution module provided in these embodiments will be described below.
[0040] Figure 1 A schematic diagram of a power distribution module according to an embodiment of this application is shown. The power distribution module includes an input interface 10, a transformer module 20, and an output interface 30.
[0041] Input interface 10 can be connected to the three-phase power supply terminal of external power supply 40 to receive three-phase AC power provided by external power supply 40. For example, input interface 10 may include multiple input pins, and when input interface 10 is connected to external power supply 40, two input pins of input interface 10 can be connected to two phases of the three-phase power supply terminal respectively. That is, input interface 10 can introduce two phases of three-phase AC power.
[0042] The two input terminals of the transformer module 20 can be connected to the two input pins of the input interface 10 to receive two phases of the three-phase AC power. The AC voltage can be adjusted by adjusting the turns ratio of the primary winding to the secondary winding in the transformer module 20.
[0043] In a three-phase alternating current system, taking phase A (220cosθ°), phase B (220cos(θ+120°), and phase C (220cos(θ+240°)) as an example, the phase voltage Uab between phases A and B is:
[0044] Uab=|220cos(θ+120°)-220cosθ°|
[0045] =|220(cos(θ+120°)-cos0°)|
[0046] =|220(-1 / 2cosθ-√3 / 2sinθ)|
[0047] =|-220(1 / 2cosθ+√3 / 2sinθ)|
[0048] =|-220(sin30°cosθ+cos30°sinθ)|
[0049] =|-220sin(θ+30°)|
[0050] =220;
[0051] According to the above calculations, Uab has the same AC frequency as phases A, B, and C, and the phase angle of Uab lags behind phase A by 30°.
[0052] Similarly, since the phase difference between phases A and C and the phase difference between phases B and C are both 120°, the phase voltage Uab = Ubc = Uab = 220VAC. That is, the voltage between any two phases in a three-phase power supply is an AC voltage with the same frequency as the three-phase AC power supply.
[0053] Based on the above, the primary winding of the transformer module is connected to the two input pins of the input interface 10, and after being connected to two phases of a three-phase AC power supply, it can be converted into a single-phase AC power supply with the same frequency. By adjusting the number of turns in the primary and secondary windings of the transformer module 20, the AC voltage of the single-phase AC power output by the transformer module 20 can be adjusted.
[0054] The aforementioned transformer module 20 also has an isolation function, which can isolate the three-phase AC power on the input side from the single-phase AC power on the output side.
[0055] The output interface 30 may include multiple output pins. Two output pins of the output interface 30 may be connected to two output terminals of the transformer module 20 to receive single-phase AC power provided by the transformer module 20. One of the two output terminals of the transformer module 20 may be grounded to realize the neutral grounding of the single-phase AC power, so that the single-phase AC power output by the transformer module 20 is the AC voltage of the reference voltage ground.
[0056] When the output interface 30 is connected to the external power receiving module 50, the two output pins of the output interface 30 can be connected to the two AC power terminals of the external power receiving module 50 respectively to provide power to the external power receiving module 50.
[0057] In this embodiment, the transformer module 20 converts two phases of the incoming three-phase AC power into single-phase AC power, which is then supplied to the external power receiving module 50 via the output interface 30. Since none of the three-phase AC power phases can be grounded, after the transformer module 20 converts two phases into single-phase AC power, one of the two output terminals can be grounded to generate a single-phase AC voltage with a reference voltage grounded. Compared to the conversion method using a step-up transformer, the single-phase AC power obtained in this way avoids electromagnetic interference generated by the step-up transformer during operation. The isolation function of the transformer module 20 filters out high-frequency components of the three-phase AC power, such as interference and noise, improving the stability and reliability of the AC power. This reduces the risk of the external power receiving module 50 triggering ground protection due to an excessively high reference voltage relative to ground when receiving single-phase AC power, ensuring stable operation of the external power receiving module 50 under single-phase AC power supply.
[0058] Please refer to Figure 2 In some embodiments, the input interface 10 may include three input pins. The first and second pins of the input interface 10 are electrically connected to two phases of the three-phase power supply, respectively. For example, the first pin of the input interface 10 is connected to phase A of the power supply, and the second pin is connected to phase B of the power supply. The third pin of the input interface 10 may be grounded. For example, when the power distribution module is installed inside a device, the third pin of the input interface 10 may be connected to the device casing and grounded through the casing.
[0059] The output interface 30 may include three output pins. The first and second pins of the output interface 30 are electrically connected to the two power supply terminals of the external powered module 50, respectively, to provide single-phase AC power to the external powered module 50. The third pin of the output interface 30 can be electrically connected to the third pin of the input interface 10 to ground the third pin of the output interface 30. When the output interface 30 is connected to the external powered module 50, the grounding terminal of the external powered module 50 can be grounded through the third pin of the output interface 30, preventing electric shock accidents caused by insulation damage to the external powered module 50 or personnel contacting the live parts of the external powered module 50.
[0060] In some embodiments, the first input terminal and the second input terminal of the transformer module 20 are respectively connected to the first pin and the second pin of the input interface 10. The first output terminal and the second output terminal of the transformer module 20 are respectively connected to the first pin and the second pin of the output interface 30.
[0061] like Figure 2As shown, the third pin of the input interface 10 can be connected to either the first output terminal or the second output terminal of the transformer module 20. That is, one of the output terminals of the transformer module 20 can be grounded through the third pin of the input interface 10, so that the reference voltage of the single-phase AC power output by the transformer module 20 is 0.
[0062] Understandably, at this time, of the two output terminals of the transformer module 20, the output terminal that is electrically connected to the third pin of the input interface 10 is equivalent to the neutral wire terminal of single-phase AC power, and the other output terminal is equivalent to the live wire terminal.
[0063] In some embodiments, the transformer module 20 may include an E-type transformer. Using an E-type transformer for AC voltage conversion can effectively suppress inrush current during AC power-on, preventing impact on the upstream circuit breaker and thus avoiding circuit breaker tripping.
[0064] In some embodiments, the power distribution module may further include an overheat protection module.
[0065] The overheat protection module may include a temperature sensor that detects the operating temperature of the transformer module 20.
[0066] The overheat protection module can disconnect the electrical connection between the transformer module 20 and the output interface 30 when the temperature sensor detects an overheating abnormality in the transformer module 20, thereby realizing the overheat protection function.
[0067] It is understandable that surge protection and overcurrent / overload protection can also be achieved through other modules in the above power distribution module, which will not be elaborated here.
[0068] Please refer to Figure 3 In some embodiments, the temperature sensor may include a thermal switch SW, which can change from an on state to an off state when the temperature of the transformer module 20 reaches a certain threshold.
[0069] The overheat protection module may also include an AC contactor KM1.
[0070] The coil of AC contactor KM1 is connected to thermal switch SW, and the main contacts of AC contactor KM1 are connected between transformer module 20 and output interface 30.
[0071] The coil of AC contactor KM1 is connected in series with thermal switch SW in the same circuit. When thermal switch SW is on, the coil of AC contactor KM1 is energized, controlling the main contacts to close. At this time, the single-phase AC power output from transformer module 20 is output to output interface 30 through the on-state main contacts. When the temperature of transformer module 20 rises above a certain threshold, thermal switch SW switches to the off state. At this time, the coil of AC contactor KM1 is de-energized, the main contacts open, thereby disconnecting the electrical connection between transformer module 20 and output interface 30. By setting AC contactor KM1 and thermal switch SW, transformer module 20 can be disconnected from output interface 30 when it overheats, thus stopping the output of single-phase AC power.
[0072] Please continue to refer to Figure 3 In some embodiments, the power distribution module may also include a switching power supply module PS1.
[0073] The AC input terminal of the switching power supply module PS1 is connected to the two input pins of the input interface 10, and the DC output terminal of the switching power supply module PS1 is connected in series with the coil of the AC contactor KM1 and the thermal switch SW. The switching power supply module PS1 can convert two phases of a three-phase AC power supply into a DC power supply voltage.
[0074] When the thermal switch SW is turned on, the DC circuit formed by the coil, the thermal switch SW and the switching power supply module PS1 is turned on. The coil of the AC contactor KM1 receives the DC power supply voltage and is in the energized state. At this time, the AC contactor KM1 can connect the transformer module 20 and the output interface 30.
[0075] When the thermal switch SW is open, the DC circuit is disconnected, and the coil of the AC contactor KM1 does not receive DC power supply voltage and is in a de-energized state. At this time, the AC contactor KM1 can disconnect the transformer module 20 from the output interface 30.
[0076] Please refer to Figure 4 In some embodiments, the power distribution module may further include an operation indication module 60.
[0077] The AC power supply terminal of the operation indicator module 60 is electrically connected to the output interface 30. When the single-phase AC power generated by the transformer module 20 is transmitted to the output interface 30, the operation indicator module 60 can generate an operation indicator signal to indicate that the user's output interface 30 can provide single-phase AC power. Conversely, if single-phase AC power cannot be transmitted to the output interface 30, the operation indicator module 60 cannot generate an operation indicator signal, and the user can determine the power supply status of the output interface 30 based on the presence or absence of the operation indicator signal.
[0078] like Figure 4As shown, in some embodiments, the operation indicator module 60 may include an operation indicator light HL1 connected between a first pin and a second pin of the output interface 30. When the output interface 30 is capable of providing single-phase AC power, the operation indicator light HL1 may illuminate to indicate to the user that the output interface 30 is in a power-available state.
[0079] Figure 4 The connection relationships between the various pins of the transformer module and the corresponding devices within the transformer module are also shown. As an optional implementation, in the above embodiment, the external power supply 40 can provide three-phase AC power with a line voltage of 208VAC and a phase voltage of 120VAC, and the power distribution module can convert the three-phase AC power into single-phase AC power of 220VAC.
[0080] Please refer to Figure 5 This application also provides a power distribution device, which may include a cabinet 200 and at least one power distribution module 100 provided in the above embodiments of this application. The power distribution module 100 may be detachably connected to the cabinet 200.
[0081] When the power distribution module 100 is detachably installed in the cabinet in modular form, it features a compact size and convenient installation. If a power distribution module 100 malfunctions, maintenance personnel can replace the malfunctioning module 100 with a working one by disassembling and replacing it, thereby improving maintenance efficiency, reducing maintenance time costs, and minimizing the impact on production line efficiency.
[0082] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.
[0083] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0084] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the method and core ideas of this application. The above are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this application to other situations without modification, should all be considered within the scope of protection of this application.
Claims
1. A power distribution module, characterized by, The power distribution module comprises: an input interface for connecting with three-phase power supply terminals of an external power supply; a voltage conversion module, two input terminals of the voltage conversion module being connected with two input pins of the input interface, the voltage conversion module being used for converting two phases of three-phase alternating current into single-phase alternating current and isolating the three-phase alternating current from the single-phase alternating current; an output interface, two output pins of the output interface being connected with two output terminals of the voltage conversion module, one of the two output terminals of the voltage conversion module being grounded; the output interface being used for connecting with an external power receiving module.
2. The power distribution module of claim 1, wherein, The first pin and the second pin of the input interface are respectively used for electrically connecting with two phases of the three-phase power supply terminals, and the third pin of the input interface is used for grounding. The first pin and the second pin of the output interface are respectively used for electrically connecting with two power supply terminals of the external power receiving module, and the third pin of the output interface is electrically connected with the third pin of the input interface.
3. The power distribution module of claim 2, wherein, The first input terminal and the second input terminal of the voltage conversion module are respectively connected with the first pin of the input interface and the second pin of the input interface, and the first output terminal and the second output terminal of the voltage conversion module are respectively connected with the first pin of the output interface and the second pin of the output interface. The third pin of the input interface is connected with the first output terminal of the voltage conversion module or the second output terminal of the voltage conversion module.
4. The power distribution module of claim 2, wherein, The voltage conversion module comprises an E-type transformer.
5. The power distribution module of claim 1, wherein, The power distribution module further comprises: an overheat protection module comprising a temperature sensor for detecting an operating temperature of the voltage conversion module, the overheat protection module being used for disconnecting the electrical connection between the voltage conversion module and the output interface when an overheat abnormality of the voltage conversion module is detected.
6. The power distribution module of claim 5, wherein, The temperature sensor comprises a thermal switch; The overheat protection module further comprises: an alternating current contactor, a coil of the alternating current contactor being connected in series with the thermal switch, and main contacts of the alternating current contactor being connected between the voltage conversion module and the output interface; The alternating current contactor is used for disconnecting the electrical connection between the voltage conversion module and the output interface when the thermal switch is disconnected due to overheat.
7. The power distribution module of claim 6, wherein, The power distribution module further comprises: a switching power supply module, alternating current input terminals of the switching power supply module being connected with the two input pins of the input interface, and direct current output terminals of the switching power supply module being connected in series with the alternating current contactor and the thermal switch; the switching power supply module being used for converting two phases of three-phase alternating current into a direct current power supply voltage.
8. The power distribution module of claim 2, wherein, The power distribution module further comprises: an operating indication module, alternating current power supply terminals of the operating indication module being electrically connected with the output interface, the operating indication module being used for generating an operating indication signal when the output interface provides single-phase alternating current.
9. The power distribution module of claim 8, wherein, The operating indication module comprises an operating indication lamp connected between the first pin and the second pin of the output interface, the operating indication lamp being used for emitting light when the output interface provides single-phase alternating current.
10. A power distribution apparatus, comprising: The power distribution device comprises a cabinet body and at least one power distribution module as claimed in any one of claims 1-9, the power distribution module being detachably connected with the cabinet body.