Positive and negative bipolar multipath adjustable power supply module

Abstract

The utility model relates to the technical field of power supply systems, in particular to a positive and negative bipolar multi-path adjustable power supply module, which comprises a multi-path single-path sub power supply system, a voltage output unit, a multi-free magnetic suspension micro-motion platform input unit, a direct-current power supply, a communication system and a personal computer (PC) industrial personal computer, the PC industrial personal computer is connected with the communication system; the communication system is connected with the multi-path single-path sub power supply system; the multi-path single-path sub power supply system is connected with the voltage output unit; the voltage output unit is connected with the multi-free magnetic suspension micro-motion platform input unit; the direct-current power supply is connected with the multi-path single-path sub power supply system; according to the utility model, when the voltage is synchronously controlled, the single-path voltage is adjustable, and power can be supplied to a plurality of loads of the magnetic suspension micro-motion platform at the same time; and the designed power supply module is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply systems, in particular to a positive and negative bipolar multi-channel adjustable power supply module. Background Art

[0002] In the field of precision manufacturing and positioning control, magnetically suspended micro-motion platforms, with their high precision, high dynamic performance and low friction, have become an ideal choice for achieving micron-level or even nano-level displacement control. Such platforms usually require precise control in multiple degrees of freedom to meet the needs of complex tasks. However, to achieve high-precision control of multi-degree-of-freedom magnetically suspended micro-motion platforms, the key is to provide stable, accurate and flexibly adjustable voltage outputs for each coil load of the platform.

[0003] Although the traditional DC voltage device can provide voltage for the magnetic levitation micro-motion platform to a certain extent, it is powerless when faced with the high voltage output requirements of the multi-degree-of-freedom magnetic levitation micro-motion platform. First of all, the traditional DC voltage device can only provide a fixed voltage output, which cannot meet the personalized voltage requirements of different coil loads in the magnetic levitation micro-motion platform, such as the number, positive and negative voltage, size, etc. This limitation seriously restricts the motion control accuracy of the magnetic levitation micro-motion platform in multiple degrees of freedom. Secondly, the traditional DC voltage device also has deficiencies in the flexibility and accuracy of voltage regulation.

[0004] For multi-DOF magnetic suspension micro-motion platforms, it is necessary to adjust the voltage of each coil load in real time according to the control requirements to achieve precise position and posture control. However, traditional DC voltage devices often cannot achieve precise regulation of single-channel voltage and cannot meet this requirement. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a positive and negative bipolar multi-channel adjustable power supply module.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a positive and negative bipolar multi-channel adjustable power supply module, comprising a multi-channel single-channel sub-power supply system, a voltage output unit, a multi-freedom magnetic suspension micro-motion platform input unit, a DC power supply, a communication system and a PC industrial control computer.

[0008] The PC industrial computer is connected to the communication system; the communication system is connected to the multi-channel single-channel power supply system; the multi-channel single-channel power supply system is connected to the voltage output unit; the voltage output unit is connected to the multi-freedom magnetic suspension micro-motion platform input unit; and the DC power supply is connected to the multi-channel single-channel power supply system.

[0009] Preferably, the multi-channel single-channel sub-power supply system includes a first single-channel sub-power supply circuit; the voltage output unit includes a first voltage output device; the communication system is connected to the first single-channel sub-power supply circuit; the first single-channel sub-power supply circuit and the first voltage output device are connected; the first single-channel sub-power supply circuit, the communication system and the first voltage output device together constitute a single circuit subsystem.

[0010] Preferably, the first single-channel power supply circuit includes a main circuit and a control circuit; the control circuit is connected to the main circuit.

[0011] Preferably, the DC power supply is connected to the main circuit; the communication system is connected to the control circuit; and the main circuit is connected to the first voltage output device.

[0012] Preferably, the control circuit includes an H-bridge MOS driver; the main circuit includes a first DC / DC converter, a second DC / DC converter and an H-bridge circuit; the DC power supply is connected to the first DC / DC converter and the second DC / DC converter, respectively; the first DC / DC converter and the second DC / DC converter are connected to the H-bridge MOS driver; and the H-bridge MOS driver is connected to the H-bridge circuit.

[0013] Preferably, the H-bridge circuit is connected to a first voltage output device.

[0014] Preferably, the control circuit further includes a MOS driver, a microcontroller and a signal conditioning circuit; the signal conditioning circuit is connected to the microcontroller; and the microcontroller is connected to the MOS driver.

[0015] Preferably, the signal conditioning circuit is connected to the first voltage output device.

[0016] Preferably, the MOS driver is connected to the first DC / DC converter and the second DC / DC converter respectively.

[0017] Preferably, the microcontroller is connected to a communication system.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] For the control of multi-freedom magnetic levitation micro-motion platform, the positive and negative bipolar multi-channel adjustable power supply module can obtain multiple positive and negative bipolar and single-channel adjustable voltages to meet the needs of multiple coils in the driving platform for different voltages. In future practical applications, it can be expanded to n×n matrix coil loads, and the positive and negative bipolar multi-channel adjustable power supply module is more convenient to transplant and has strong universality.

[0020] From the control aspect, the utility model realizes synchronous control of voltage, and the single-circuit voltage is adjustable, which can supply power to multiple loads of the magnetic suspension micro-motion platform at the same time; and the designed power module has a simple structure and low cost.

[0021] Furthermore, in terms of positive and negative bipolar switching, the H-bridge of the single-circuit power supply main circuit, when the positive and negative bipolar power supplies are switched, the H-bridge circuit topology has a simple structure and stable control, which is suitable for complex drive platform control and is suitable for actual magnetic levitation micro-motion platforms; in terms of main circuit design, a non-isolated Buck converter is used, which has the advantages of simple structure, fewer components, small size, low cost, and high power density compared to an isolated buck converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention.

[0023] In the attached picture:

[0024] Figure 1 This is a structural schematic diagram of a positive and negative bipolar multi-channel adjustable power supply module of the utility model;

[0025] Figure 2 It is a structural schematic diagram of a positive and negative bipolar single-channel adjustable power supply system of the utility model;

[0026] Figure 3 It is a circuit schematic diagram of the DC / DC converter-Buck circuit of the utility model;

[0027] Figure 4 It is a circuit schematic diagram of a DC / DC converter-Buck circuit with the upper tube turned on in the utility model;

[0028] Figure 5 It is a circuit schematic diagram of a DC / DC converter-Buck circuit with the lower tube turned on in the utility model;

[0029] Figure 6 It is a circuit principle diagram of the H-bridge circuit of the utility model;

[0030] Figure 7 It is a circuit schematic diagram of the positive polarity working mode of the H-bridge circuit of the utility model;

[0031] Figure 8 It is a circuit schematic diagram of the negative polarity working mode of the H-bridge circuit of the utility model;

[0032] Fig. 9It is a circuit schematic diagram of the signal conditioning circuit of the utility model;

[0033] Fig.10 It is the work flow chart of the utility model;

[0034] In the figure, 1-the first single-channel power supply circuit; 2-the second single-channel power supply circuit; 16-the sixteenth single-channel power supply circuit; 17-the first voltage output device; 18-the second voltage output device; 32-the sixteenth voltage output device; 33-the multi-freedom magnetic suspension micro-motion platform input unit; 34-the DC power supply; 35-the communication system; 36-the PC industrial computer; 37-the single circuit subsystem; 38-the first DC / DC converter; 39-the second DC / DC converter; 40-the H-bridge circuit; 41-the H-bridge MOS driver; 42-the MOS driver; 43-the microcontroller; 44-the signal conditioning circuit; 45-the control circuit; 46-the main circuit. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0037] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0038] The magnetic levitation micro-motion platform is a core component in the field of precision manufacturing. In order to realize the multi-degree-of-freedom motion control of the magnetic levitation micro-motion platform, there are 4×4=16 coil loads on the magnetic drive platform. The number, positive and negative, and size of the voltages are different. The designer of the drive platform has put forward the voltage requirements for controlling the working voltage of the magnetic levitation micro-motion platform, including multiple output channels, positive and negative bipolarity, wide voltage range, and DC power supply.

[0039] In addition, since there are 16 loads in the multi-degree-of-freedom magnetic suspension micro-motion platform, different voltages need to be obtained at the same time, so the output working voltage used to drive the platform needs to be adjustable in one channel. At present, the multi-degree-of-freedom magnetic drive platform requires a 4×4 distributed coil matrix load, which will be expanded to an n×n matrix coil load in the future. In order to facilitate power transplantation, a positive and negative bipolar multi-channel adjustable power module is integrated into the sub-power system.

[0040] The utility model provides a positive and negative bipolar multi-channel adjustable power supply module, including a multi-channel single-channel sub-power supply system, a voltage output unit, a multi-freedom magnetic suspension micro-motion platform input unit 33, a DC power supply 34, a communication system 35 and a PC industrial control computer 36; the PC industrial control computer 36 is connected to the communication system 35; the communication system 35 is connected to the multi-channel single-channel sub-power supply system; the multi-channel single-channel power supply system is connected to the voltage output unit; the voltage output unit is connected to the multi-freedom magnetic suspension micro-motion platform input unit 33; the DC power supply 34 is connected to the multi-channel single-channel power supply system.

[0041] like Figure 1 As shown, the utility model provides a positive and negative bipolar multi-channel adjustable power supply module, including 16-channel single-channel sub-power supply system, voltage output unit, multi-freedom magnetic suspension micro-motion platform input unit 33, DC power supply 34, communication system 35 and PC industrial control computer 36; the PC industrial control computer 36 is connected to the communication system 35 for data information transmission; the communication system 35 is connected to the 16-channel single-channel sub-power supply system for data information processing; the 16-channel single-channel sub-power supply system is connected to the voltage output unit to obtain different output voltages; the voltage output unit is connected to the multi-freedom magnetic suspension micro-motion platform input unit 33 to send the required output voltage to the 16 loads of the driving platform; the DC power supply 34 is connected to the 16-channel single-channel sub-power supply system to provide power to the power module circuit. Among them, the communication system 35 adopts FPGA, and the microcontroller 43 adopts STM32F405RG.

[0042] The PC industrial computer 36 of the utility model reads the position information of the driving platform through the sensor; then the positive and negative polarities and sizes of 16 corresponding voltages are calculated through the processing of the controller in the PC industrial computer 36, and finally the 16 required voltages are transmitted to 16 single-channel power supply systems through the communication system 35.

[0043] like Figure 2 As shown, the 16-way single-channel sub-power supply system includes a first single-channel sub-power supply circuit 1; the voltage output unit includes a first voltage output device 17; the communication system 35 is connected to the first single-channel sub-power supply circuit 1; the first single-channel sub-power supply circuit 1 and the first voltage output device 17 are connected; the first single-channel sub-power supply circuit 1, the communication system 35 and the first voltage output device 17 together constitute a single circuit subsystem 37.

[0044] The first single-circuit sub-power supply circuit 1 includes a main circuit 46 and a control circuit 45; the control circuit 45 is connected to the main circuit 46. The DC power supply 34 is connected to the main circuit 46; the communication system 35 is connected to the control circuit 45; the main circuit 46 is connected to the first voltage output device 17. The main circuit 46 of the single circuit subsystem 37 is composed of two DC / DC converters and an H-bridge circuit 40; the power conversion part is a DC / DC converter, which is powered by the input DC power supply 34; the communication system 35 is connected to the MOS driver 42, and then connected to the DC / DC converter to achieve output voltage regulation; the DC / DC converter is connected to the H-bridge driver, and then cascaded with the H-bridge circuit 40 to output adjustable and bipolar voltages respectively.

[0045] The control circuit 45 includes an H-bridge MOS driver 41; the main circuit 46 includes a first DC / DC converter 38, a second DC / DC converter 39 and an H-bridge circuit 40; the DC power supply 34 is connected to the first DC / DC converter 38 and the second DC / DC converter 39 respectively; the first DC / DC converter 38 and the second DC / DC converter 39 are connected to the H-bridge MOS driver 41; the H-bridge MOS driver 41 is connected to the H-bridge circuit 40. The H-bridge circuit 40 is connected to the first voltage output device 17; wherein the first DC / DC converter 38 is a DC / DC converter (positive), and the second DC / DC converter 39 is a DC / DC converter (negative).

[0046] The control circuit 45 also includes a MOS driver 42, a microcontroller 43 and a signal conditioning circuit 44; the signal conditioning circuit 44 is connected to the microcontroller 43; the microcontroller 43 is connected to the MOS driver 42; the signal conditioning circuit 44 is connected to the first voltage output device 17; the MOS driver 42 is respectively connected to the first DC / DC converter 38 and the second DC / DC converter 39. The microcontroller 43 is connected to the communication system 35. According to the connection between the communication system 35 and the microcontroller 43, the positive and negative and the magnitude of the required voltage are processed and calculated, the MOS driver 42 is connected to select to start or stop one of the DC / DC converters, and then the H-bridge driver is connected to select the opening and closing of the H-bridge switch tube to realize bipolar power supply, obtain the required output voltage signal, and then connect the microcontroller 43 through the signal conditioning circuit to form a closed-loop control single-channel power supply system, form a closed-loop control, and adjust the voltage signal.

[0047] like Figure 3 As shown, the working principle of the DC / DC converter-Buck circuit of the utility model includes synchronous tube Q 1 Usually choose power MOSFET tube, synchronous tube Q 2 , Schottky diode D 1Used to reduce the MOS drain-source oscillation voltage, filter inductor L, filter capacitor C, load R. Assumption: Power electronic devices are ideal components, the switch is turned on and off instantly; in one cycle, the input voltage V in Stable and unchanged, the output voltage V across the filter capacitor out Basically unchanged, ripple is ignored; capacitor C and inductor L are both ideal energy storage components, without parasitic parameters, and the inductor works in the unsaturated region; switching period T = T on +T off .

[0048] like Figure 4 As shown in the figure, the working principle of the DC / DC converter-Buck circuit with the upper tube turned on: When the Buck converter works at T on During this period, the switch tube Q 1 Open, Q 2 Turn off, freewheeling diode D 1 Reverse bias.

[0049] like Figure 5 As shown, the working principle of the DC / DC converter-Buck circuit with the lower tube turned on: When the Buck converter works at T off During this period, the switch tube Q 1 When the driving pulse signal on is low level, the switch tube Q 1 Shutdown, synchronous tube Q 2 Turn on, due to the inductor current i L Cannot mutate, will be synchronized through Q 2 Tube continuous flow.

[0050] like Figure 6 As shown, the working mode of the H-bridge circuit 40 of the utility model is: the H-bridge circuit 40 does not participate in chopping, and the power switch tube on it is used as an "ideal switch" to control the output direction of the voltage and current on the load. The utility model includes 4 switch tubes S 1 , S 2 , S 3 , S 4 , 4 diodes D 1 , D 2 , D 3 , D 4 , 2 filter capacitors C 1 , C 2 and load R.

[0051] like Figure 7 As shown, the positive polarity working mode of the H-bridge circuit 40 of the utility model is: when the multi-degree-of-freedom magnetic levitation micro-motion platform requires a positive current to flow through the coil, the negative synchronous Buck converter will be turned off to ensure that S2 and S3 are in the off state, and then the positive synchronous Buck converter will be turned on for adjustment, and S1 and S4 will be turned on at the same time.

[0052] like Figure 8 As shown, the negative polarity working mode of the H-bridge circuit 40 of the present invention is: when the coil needs a negative current, the positive synchronous Buck converter, S1 and S4 are turned off, and the negative synchronous Buck converter, S2 and S3 are turned on.

[0053] like Fig. 9 As shown, the utility model has one differential signal conditioning circuit to collect the positive polarity current of the load, and the other circuit to collect the negative polarity current of the load. When performing the control algorithm, the digital signal of the corresponding polarity can be used. Since the load of the multi-freedom multi-magnetic suspension micro-motion platform requires very small current, in order to improve the anti-interference of the sampling resistor and reduce the influence of noise on sampling, it is necessary to sacrifice the efficiency of part of the converter, and finally select a 1Ω precision sampling resistor.

[0054] like Fig.10 As shown, the working process of the positive and negative bipolar single-channel adjustable power supply module of the utility model is as follows:

[0055] Step 1: First follow Figure 1 and Figure 2 Connect the various parts of this module. At the same time, connect the external DC power supply 34 to the power supply, connect the voltage output unit to the multi-freedom magnetic suspension micro-motion platform input unit 33, and complete the hardware connection of the drive platform.

[0056] Step 2: Based on the position information of the multi-degree-of-freedom magnetic levitation micro-motion platform; the processor (control algorithm) of the PC industrial computer 36 calculates the required 16 voltages; 16 different voltage control instructions are issued by the PC industrial computer 36, and transmitted to the 16 single circuit subsystems 37 by the communication system 35.

[0057] Step three: compare the 16 voltages transmitted by the communication system 35 with the 16 output voltages. If they are the same, the microcontroller 43 is not started; if they are different, a single microcontroller 43 is required to regulate a single positive and negative bipolar adjustable power supply module.

[0058] Step 4: 16 positive and negative bipolar multi-channel adjustable power supply modules: According to the positive and negative and magnitude of the 16 voltages transmitted by the communication system 35, the corresponding voltages are output, and the corresponding conversion is performed according to the output voltages obtained. The generated output voltage is transmitted to the coil load.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

Claims

1. A positive and negative bipolar multi-channel adjustable power supply module, characterized in that: It includes a multi-channel single-channel power supply system, a voltage output unit, a multi-freedom magnetic suspension micro-motion platform input unit (33), a direct current power supply (34), a communication system (35) and a PC industrial control computer (36); The PC industrial control computer (36) is connected to the communication system (35); the communication system (35) is connected to the multi-channel single-channel sub-power supply system; the multi-channel single-channel sub-power supply system is connected to the voltage output unit; the voltage output unit is connected to the multi-freedom magnetic suspension micro-motion platform input unit (33); and the DC power supply (34) is connected to the multi-channel single-channel sub-power supply system.

2. A positive and negative bipolar multi-channel adjustable power supply module according to claim 1, characterized in that: The multi-channel single-channel sub-power supply system comprises a first single-channel sub-power supply circuit (1); the voltage output unit comprises a first voltage output device (17); the communication system (35) is connected to the first single-channel sub-power supply circuit (1); the first single-channel sub-power supply circuit (1) is connected to the first voltage output device (17); the first single-channel sub-power supply circuit (1), the communication system (35) and the first voltage output device (17) together constitute a single circuit subsystem (37).

3. A positive and negative bipolar multi-channel adjustable power supply module according to claim 2, characterized in that: The first single-channel power supply circuit (1) comprises a main circuit (46) and a control circuit (45); the control circuit (45) is connected to the main circuit (46).

4. A positive and negative bipolar multi-channel adjustable power supply module according to claim 3, characterized in that: The DC power supply (34) is connected to the main circuit (46); the communication system (35) is connected to the control circuit (45); and the main circuit (46) is connected to the first voltage output device (17).

5. The positive and negative bipolar multi-channel adjustable power supply module according to claim 3, characterized in that: The control circuit (45) includes an H-bridge MOS driver (41); the main circuit (46) includes a first DC / DC converter (38), a second DC / DC converter (39) and an H-bridge circuit (40); the DC power supply (34) is connected to the first DC / DC converter (38) and the second DC / DC converter (39), respectively; the first DC / DC converter (38) and the second DC / DC converter (39) are connected to the H-bridge MOS driver (41); and the H-bridge MOS driver (41) is connected to the H-bridge circuit (40).

6. A positive and negative bipolar multi-channel adjustable power supply module according to claim 5, characterized in that: The H-bridge circuit (40) is connected to the first voltage output device (17).

7. The positive and negative bipolar multi-channel adjustable power supply module according to claim 5, characterized in that: The control circuit (45) further comprises a MOS driver (42), a microcontroller (43) and a signal conditioning circuit (44); the signal conditioning circuit (44) is connected to the microcontroller (43); and the microcontroller (43) is connected to the MOS driver (42).

8. The positive and negative bipolar multi-channel adjustable power supply module according to claim 7, characterized in that: The signal conditioning circuit (44) is connected to the first voltage output device (17).

9. The positive and negative bipolar multi-channel adjustable power supply module according to claim 7, characterized in that: The MOS driver (42) is connected to the first DC / DC converter (38) and the second DC / DC converter (39) respectively.

10. The positive and negative bipolar multi-channel adjustable power supply module according to claim 7, characterized in that: The microcontroller (43) is connected to the communication system (35).

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