A multi-channel digital current source device and an electronic device

Abstract

The utility model belongs to power supply circuit technical field especially relates to a kind of multi-channel digital current source device and a kind of electronic equipment, device includes main control board and multiple parallel current output channels, each current output channel includes: front power supply board, for receiving external input power supply and carrying out preliminary conversion;Bus capacitor board, for stabilizing bus voltage;Power board, is provided with the power conversion circuit being made of power switch tube, for converting the current output of controlled bus voltage stabilization;Drive board, for driving power switch tube;And current sampling board, for collecting the current signal of power board output.The utility model is small in size, portable, power density is high, and, output current ripple is smaller, can satisfy high-precision application scene, in addition, main control board can be switched on current output channel according to actual situation, to form scalable structure, and output capacity and adaptive capacity are strong.

Description

Technical Field

[0001] This utility model belongs to the field of power supply circuit technology, and in particular relates to a multi-channel digital current source device and an electronic device. Background Technology

[0002] In industrial and scientific research fields such as electroplating, electrolysis, materials testing, and laboratory research, high-precision, high-current DC power sources are indispensable core equipment. Traditional kiloampere-level high-current DC power supplies typically employ a rectifier scheme consisting of a power frequency transformer and a high-power rectifier bridge. However, this existing technology has several inherent drawbacks: First, its reliance on the power frequency transformer results in bulky and heavy equipment with low power density; second, the output current ripple is relatively large, making it difficult to meet the stringent high-precision application requirements for power quality; third, limited by components and topology, traditional power supplies are mostly single-channel outputs, with limited output capacity and accuracy. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a multi-channel digital current source device and an electronic device to fundamentally solve the problems of existing current sources being large in size, low in accuracy, and difficult to expand.

[0004] This utility model embodiment is implemented as follows: a multi-channel digital current source device is provided, including a main control board and multiple parallel current output channels, each of which includes: The pre-amplifier power board is used to receive external input power and perform preliminary conversion. The bus capacitor board is connected to the front-end power supply board and is used to stabilize the bus voltage. The power board is connected to the bus capacitor board. The power board is equipped with a power conversion circuit composed of power switching transistors to convert the stable bus voltage into a controlled current output. A driver board, connected to both the power board and the main control board, is used to drive the power switching transistors; and A current sampling board is connected to both the power board and the main control board, and is used to collect the current signal output by the power board.

[0005] In some embodiments, the current output channel further includes a filter board connected to the output terminal of the power board for smoothing the output current.

[0006] In some embodiments, the filter board includes a filter inductor connected to the output terminal of the power board.

[0007] In some embodiments, the current output channel further includes a heat sink disposed in close contact with the power board.

[0008] In some embodiments, the radiator is a water-cooled radiator.

[0009] In some embodiments, the power board is an H-bridge power board, in which power switches are configured in pairs, and each pair of power switches constitutes a bridge arm structure in the H-bridge topology.

[0010] In some implementations, the current sampling board uses a shunt for sampling.

[0011] In some embodiments, the multi-channel digital current source device further includes a chassis, in which the main control board and the current output channel are both disposed.

[0012] In some embodiments, the chassis includes a chassis frame and a top cover, the top cover covering the top of the chassis frame; an accommodating cavity is formed between the top cover and the chassis frame, and the main control board and the current output channel are both disposed within the accommodating cavity.

[0013] This invention also provides an electronic device, including a multi-channel digital current source device as described in any of the preceding embodiments.

[0014] This invention provides a multi-channel digital current source device and an electronic device. The main control board controls each parallel current output channel. In each current output channel, the front-end power supply board receives external input power and performs preliminary conversion; the bus capacitor board stabilizes the bus voltage; the driver board drives the power switching transistor; the power board converts the stable bus voltage into a controlled current output; and the current sampling board collects the current signal output by the power board and transmits it to the main control board. This invention is small in size, lightweight, has high power density, and exhibits low output current ripple, meeting the requirements of high-precision applications. Furthermore, the main control board can activate the current output channels according to actual conditions, thus forming an expandable structure with strong output capability and adaptability. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the multi-channel digital current source device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the multi-channel digital current source device provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the current output channel provided by an embodiment of the present invention; Figure 4 This is a schematic diagram of the current output channel from another perspective provided by an embodiment of the present invention; Figure 5 This is a schematic diagram of the top cover provided in an embodiment of the present utility model; Figure 6This is a schematic diagram of a current source circuit provided by an embodiment of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0017] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a link, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0022] This utility model provides a multi-channel digital current source device, referenced... Figure 1 and Figure 2 It includes a main control board 100 and multiple parallel current output channels 200, each of the current output channels 200 including: The preamplifier power board 210 is used to receive external input power and perform preliminary conversion; Bus capacitor board 220 is connected to the front power supply board 210 and is used to stabilize bus voltage; The power board 230 is connected to the bus capacitor board 220. The power board 230 is equipped with a power conversion circuit composed of power switching transistors, which is used to convert the stable bus voltage into a controlled current output. The driver board 240 is connected to the power board 230 and the main control board 100 respectively, and is used to drive the power switching transistor; and The current sampling board 250 is connected to the power board 230 and the main control board 100 respectively, and is used to collect the current signal output by the power board 230.

[0023] The main control board 100 is connected to multiple parallel current output channels 200. The main control board 100 can control the conduction of each current output channel 200 to achieve different current outputs. In some embodiments, the output current increases with each additional current output channel 200 that is activated.

[0024] refer to Figure 1 , Figure 1 Although only the scenario of the main control board 100 controlling one current output channel 200 is shown, the same logic can be applied to scenarios where the main control board 100 controls the other current output channels 200. In each current output channel 200, an external input power supply is input to the front-end power supply board 210, which performs preliminary conversion based on the input power supply to provide usable power to the subsequent circuitry. The bus capacitor 221 receives the pre-converted power supply, stabilizes the bus voltage, and removes noise. The main control board 100 transmits the control signal to the driver board 240, which generates a drive signal based on the control signal and then transmits the drive signal to the power board 230. The power board 230 turns on the power switch based on the drive signal, thereby converting the stable bus voltage into a controlled current output for the load 2000. The current acquisition board acquires the current signal output by the power board 230 and transmits it to the main control board 100, which adjusts the control signal based on the current signal. It should be noted that this utility model is intended to protect the above-mentioned hardware structures, rather than the above-mentioned processing procedures.

[0025] The multi-channel digital current source device provided by this utility model is small in size, lightweight, and has high power density. In addition, the output current ripple is small, which can meet the needs of high-precision application scenarios. Furthermore, the main control board 100 can turn on the current output channel 200 according to the actual situation, thereby forming an expandable structure that can achieve kiloampere-level current output, with strong output capability and adaptability.

[0026] In some specific embodiments of this application, reference is made to Figure 1 The current output channel 200 also includes a filter board 260, which is connected to the output terminal of the power board 230 and is used to smooth the output current. The power board 230 outputs current to the filter board 260, which smooths the current and then outputs it to the load 2000 for use by the load 2000.

[0027] In some specific embodiments of this application, reference is made to Figure 3 and Figure 4 The filter board 260 includes a filter inductor 261, which is connected to the output terminal of the power board 230. The filter inductor 261 smooths the current output by the power board 230 and transmits the current to the load 2000 through the output copper busbar 270 for use by the load 2000.

[0028] In some implementations, reference Figure 3 and Figure 4The bus capacitor board 220 includes bus capacitors 221, which are connected to the front-end power board 210. Multiple bus capacitors 221 stabilize the bus voltage.

[0029] In some specific embodiments of this application, the current output channel 200 further includes a heat sink, which is disposed in close contact with the power board 230. Since the power board 230 generates heat during operation, the heat sink can effectively dissipate this heat, thereby preventing device damage.

[0030] In some specific embodiments of this application, the radiator is a water-cooled radiator. The water-cooled radiator mainly includes a cooling plate tightly attached to the back of the power board 230, a water pump connected to the cooling plate, and an external heat sink. The coolant inside the cooling plate flows continuously under the drive of the water pump. Through efficient convection heat transfer, heat is conducted to the coolant, raising its temperature. After passing through the heat sink, the high-temperature coolant rapidly carries away the heat, enabling the power board 230 to operate stably and safely. Compared to traditional air-cooling solutions, this water-cooling scheme improves heat dissipation efficiency by an order of magnitude, which is a key guarantee for achieving high power density, miniaturization, and long-term reliable operation of the device.

[0031] In some specific embodiments of this application, the power board 230 is an H-bridge power board 230, and the power switches in the H-bridge power board 230 are configured in pairs, with each pair of power switches forming a bridge arm structure in the H-bridge topology. Under the control of the main control board 100, the drive board 240 drives the power switches in the H-bridge power board 230 to conduct.

[0032] In some specific embodiments of this application, the power switch is a metal-oxide-semiconductor field-effect transistor, which is abbreviated as MOSFET.

[0033] In some specific embodiments of this application, the current sampling board 250 uses a shunt for sampling. Compared to traditional Hall effect sensors, the current sampling board 250 of this invention uses a shunt for sampling, resulting in lower delay, wider bandwidth, and a wider measurement range. The switching frequency of the power switch can be increased to 200kHz, and a smaller filter inductor 261 can be used for the same ripple current.

[0034] In some specific embodiments of this application, reference is made to Figure 2 The multi-channel digital current source device also includes a chassis, in which the main control board 100 and the current output channel 200 are both housed. The chassis provides support for the main control board 100 and the current output channel 200.

[0035] In some specific embodiments of this application, reference is made to Figure 2 and Figure 5 The chassis includes a chassis frame 310 and a top cover 320, the top cover 320 covering the top of the chassis frame 310; an accommodating cavity is formed between the top cover 320 and the chassis frame 310, and the main control board 100 and the current output channel 200 are both disposed in the accommodating cavity.

[0036] The chassis frame 310 serves as the main support structure for the main control board 100 and the current output channels 200. The top of the chassis frame 310 is hollow, and the top cover 320 covers the top of the chassis frame 310. A cavity is formed between the chassis frame 310 and the top cover 320, in which the main control board 100 and the current output channels 200 are housed, and each current output channel 200 is independently configured.

[0037] In some implementations, reference Figure 5 The lower surface of the top cover 320 is provided with downwardly protruding reinforcing ribs 321, which greatly improve the supporting strength of the top cover 320. When there are multiple multi-channel digital current source devices, they can be stacked vertically. For two stacked multi-channel digital current source devices, the chassis frame 310 of the upper multi-channel digital current source device is placed on the top cover 320 of the lower multi-channel digital current source device. Thus, through the stacking design of multi-channel digital current source devices, there is no need to design a dedicated and complex cabinet, which greatly improves space utilization, simplifies the installation process, and makes handling and maintenance very flexible.

[0038] In some specific embodiments of this application, reference is made to Figure 2 The chassis frame 310 includes a front panel 311, on which an outwardly protruding handle 3111 is provided. Users can move and carry the chassis by gripping the handle 3111 on the front panel 311.

[0039] In some specific embodiments of this application, reference is made to Figure 2 The chassis frame 310 includes a side plate 312, and the side plate 312 is provided with an embedded handle 3121.

[0040] In some embodiments, the recessed handle 3121 is a recessed structure formed by stamping the side plate 312, and its maximum outer contour does not protrude from the outer surface of the side plate 312, so that the side of the device remains flat and is easy to install in a narrow space.

[0041] In this utility model, an embedded handle 3121 is provided on the side plate 312. Considering the center of gravity of the whole machine, the embedded handle 3121 on the side plate 312 is easier to apply force than the handle 3111 on the back of the chassis frame 310, making it easier to move. In particular, when the whole machine is placed into a small-opening cabinet such as a server rack, it is not necessary to switch hands, which improves the handling efficiency by 50%.

[0042] refer to Figure 6 The diagram illustrates the schematic of a current source circuit. This circuit includes multiple power MOSFETs, multiple filter capacitors, multiple gate resistors, multiple bias resistors, and multiple bleed resistors. Taking the power MOSFET Q1, filter capacitor C5, gate resistors R5 and R6, and bias resistor R3 in the upper left corner as an example, upon receiving the G1 signal, power MOSFET Q1 turns on. Filter capacitor C5 filters out ripple, gate resistors R5 and R6 limit the gate current to prevent Q1 from switching too quickly, and bias resistor R3 sets the gate bias voltage to ensure Q1 operates in the appropriate on / off state. The remaining units operate similarly. Bleed resistors R103 and R104 release residual charge when the circuit is powered off, ensuring circuit safety. This current source circuit achieves high-current, high-power current output control by controlling the on / off state of the power MOSFETs.

[0043] This invention also provides an electronic device, including a multi-channel digital current source device as described in any of the preceding embodiments. In the multi-channel digital current source device, a main control board 100 controls each parallel current output channel 200. In each current output channel 200, a front-end power supply board 210 receives external input power and performs preliminary conversion, a bus capacitor board 220 stabilizes the bus voltage, a driver board 240 drives a power switch, a power board 230 converts the stable bus voltage into a controlled current output, and a current sampling board 250 collects the current signal output by the power board 230 and transmits it to the main control board 100. This invention is small in size, lightweight, has high power density, and exhibits low output current ripple, meeting the requirements of high-precision applications. Furthermore, the main control board 100 can activate the current output channels 200 according to actual conditions, thus forming an expandable structure with strong output capability and adaptability.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A multi-channel digital current source device, characterized in that, It includes a main control board and multiple parallel current output channels, each of which includes: The pre-amplifier power board is used to receive external input power and perform preliminary conversion. The bus capacitor board is connected to the front-end power supply board and is used to stabilize the bus voltage. The power board is connected to the bus capacitor board. The power board is equipped with a power conversion circuit composed of power switching transistors to convert the stable bus voltage into a controlled current output. A driver board, connected to both the power board and the main control board, is used to drive the power switching transistors; and A current sampling board is connected to both the power board and the main control board, and is used to collect the current signal output by the power board.

2. The multi-channel digital current source device according to claim 1, characterized in that, The current output channel also includes a filter board, which is connected to the output terminal of the power board to smooth the output current.

3. The multi-channel digital current source device according to claim 2, characterized in that, The filter board includes a filter inductor, which is connected to the output terminal of the power board.

4. The multi-channel digital current source device according to claim 1, characterized in that, The current output channel also includes a heat sink, which is disposed in close contact with the power board.

5. The multi-channel digital current source device according to claim 4, characterized in that, The radiator is a water-cooled radiator.

6. The multi-channel digital current source device according to claim 1, characterized in that, The power board is an H-bridge power board, and the power switches in the H-bridge power board are configured in pairs, with each pair of power switches forming a bridge arm structure in the H-bridge topology.

7. The multi-channel digital current source device according to claim 1, characterized in that, The current sampling board uses a shunt for sampling.

8. The multi-channel digital current source device according to claim 1, characterized in that, The multi-channel digital current source device also includes a chassis, and the main control board and the current output channel are both located inside the chassis.

9. The multi-channel digital current source device according to claim 8, characterized in that, The chassis includes a chassis frame and a top cover, with the top cover covering the top of the chassis frame; an accommodating cavity is formed between the top cover and the chassis frame, and the main control board and the current output channel are both disposed within the accommodating cavity.

10. An electronic device, characterized in that, Includes the multi-channel digital current source device as described in any one of claims 1-9.

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