Pulse power supply with feed network discharge and pulse current test system

Abstract

The utility model discloses a pulse power supply and pulse current test system with feed network discharge. The pulse power supply and pulse current test system comprises an AC-DC bidirectional power supply, a DC-DC module, a super capacitor group, an IGBT module, a sample connection end and a master control module. During charging, the alternating current and direct current bidirectional power supply converts commercial power into direct current, the super capacitor bank is charged through the DC-DC module, the main control module controls the IGBT module to output pulse voltage to act on a metal sample so as to generate large pulse current, and when the voltage of the super capacitor bank needs to be reduced or the pulse power supply completes work, the super capacitor bank is charged through the DC-DC module. And the energy stored by the super capacitor bank is boosted by the DC-DC module and input to the AC-DC bidirectional power supply, and then is converted into 220V alternating current by the AC-DC bidirectional power supply, and the 220V alternating current is fed back to a power grid for energy recovery, so that the purposes of discharging and reducing voltage are achieved. The utility model adopts a discharge mode of feeding energy back to the power grid, does not need a relay for discharge control, and is energy-saving, environment-friendly and good in safety.

Description

Technical Field

[0001] The utility model relates to the field of pulse power supply, in particular to a pulse power supply with feeder network discharge and a pulse current test system. Background Art

[0002] Electroplastic forming refers to a forming technology that applies electric current to the plastic deformation zone of a material when it is deformed, in order to reduce the deformation resistance of the material and improve the plasticity of the material. This technology has been successfully applied to forming processes such as wire drawing and rolling, and has achieved good results. At the same time, the electric current has a positive effect on the grain refinement, damage repair and surface quality improvement of the material. Therefore, the application of electroplastic forming technology to the stamping process of light materials has a good application prospect.

[0003] In the pulse current test system of the electroplastic forming process, a pulse power supply is required to provide a pulse current. The pulse power supply needs to be discharged after use. The existing pulse power supply uses a resistor energy consumption method to discharge, and the remaining electric energy is consumed by the resistor in vain, which is not energy-saving and environmentally friendly. In addition, the resistor energy consumption discharge method needs to be controlled by relay closure. The relay has a service life, and the contacts are prone to fire and aging when passing large currents, which poses a safety hazard. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a pulse power supply with grid-fed discharge and a pulse current test system, which adopts a discharge mode of energy feedback to the grid, is energy-saving, environmentally friendly and safe.

[0005] According to the embodiment of the first aspect of the utility model, the pulse power supply with grid-fed discharge includes: an AC / DC bidirectional power supply, one end of which is connected to the grid; a DC-DC module, the other end of which is connected to one end of the DC-DC module; a supercapacitor group, the other end of which is connected to the supercapacitor group; an IGBT module, the supercapacitor group is connected to the input end of the IGBT module; a sample connection end, the sample connection end is used to connect the metal sample to be tested, and the output end of the IGBT module is connected to the sample connection end; a main control module, the first output end of the main control module is connected to the control end of the DC-DC module, and the second output end of the main control module is connected to the control end of the IGBT module, so as to control the DC-DC module to charge the supercapacitor group during testing, and then control the IGBT module to output a pulse current to the metal sample to be tested, and after the test is completed, control the DC-DC module to boost the voltage of the supercapacitor group and input it into the AC / DC bidirectional power supply, and convert the DC power into AC power through the AC / DC bidirectional power supply and feed it back to the grid for discharge.

[0006] The pulse power supply with grid-fed discharge according to the first embodiment of the utility model has at least the following beneficial effects:

[0007] During charging, the AC / DC bidirectional power supply converts the mains electricity into DC electricity, and charges the supercapacitor group through the DC-DC module. The main control module controls the IGBT module to output a pulse voltage to act on the metal sample to generate a large pulse current. When the supercapacitor group needs to reduce the voltage or the pulse power supply completes the work, the energy stored in the supercapacitor group is boosted by the DC-DC module and input to the AC / DC bidirectional power supply, and then the AC / DC bidirectional power supply converts it into 220V AC power and feeds it back to the grid for energy recovery, thereby achieving the purpose of discharging and reducing the voltage. The utility model adopts the discharge method of energy feedback to the grid, does not require a relay for discharge control, is energy-saving, environmentally friendly and has good safety.

[0008] According to some embodiments of the present invention, the model of the AC / DC bidirectional power supply is BIC-2200-48.

[0009] According to some embodiments of the present invention, the model of the main control module is TMS320F28035PAG.

[0010] According to some embodiments of the present invention, the model of the supercapacitor group is M20W-060-0150.

[0011] According to some embodiments of the present invention, the model of the IGBT module is FS200R07A1E3.

[0012] According to the pulse current testing system of the second aspect of the utility model, it includes an oscilloscope, a host computer and the above-mentioned pulse power supply with feeder grid discharge, the oscilloscope is used to read the pulse current output by the IGBT module, and the host computer is communicatively connected with the main control module.

[0013] The pulse current testing system according to the second aspect of the present invention has at least the following beneficial effects:

[0014] During charging, the AC / DC bidirectional power supply converts the mains electricity into DC electricity, and charges the supercapacitor group through the DC-DC module. The main control module controls the IGBT module to output a pulse voltage to act on the metal sample to generate a large pulse current. When the supercapacitor group needs to reduce the voltage or the pulse power supply completes the work, the energy stored in the supercapacitor group is boosted by the DC-DC module and input to the AC / DC bidirectional power supply, and then the AC / DC bidirectional power supply converts it into 220V AC power and feeds it back to the grid for energy recovery, thereby achieving the purpose of discharging and reducing the voltage. The utility model adopts the discharge method of energy feedback to the grid, does not require a relay for discharge control, is energy-saving, environmentally friendly and has good safety.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a principle block diagram of a pulse power supply with grid-fed discharge in an embodiment of the utility model;

[0018] Figure 2 The schematic diagram of the circuit of the DC-DC boost module in the embodiment of the utility model is shown in FIG. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Reference Figure 1As shown, a pulse power supply with grid-fed discharge includes: an AC / DC bidirectional power supply, a DC-DC module, a supercapacitor group, an IGBT module, a sample connection end, and a main control module. Among them, one end of the AC / DC bidirectional power supply is connected to the grid, and the other end is connected to one end of the DC-DC module. The other end of the DC-DC module is connected to the supercapacitor group, and the supercapacitor group is connected to the input end of the IGBT module. The sample connection end is used to connect the metal sample to be tested, and the output end of the IGBT module is connected to the sample connection end. The first output end of the main control module is connected to the control end of the DC-DC module, and the second output end of the main control module is connected to the control end of the IGBT module. During the test, the main control module controls the DC-DC module to charge the supercapacitor group, and then controls the IGBT module to output a pulse current to the metal sample to be tested. After the test is completed, the DC-DC module is controlled to boost the voltage of the supercapacitor group and input it into the AC / DC bidirectional power supply, and the DC power is converted into AC power through the AC / DC bidirectional power supply and fed back to the grid for discharge.

[0024] Specifically, the AC / DC bidirectional power supply in the embodiment of the utility model adopts a 60V AC / DC bidirectional power supply, which can convert the 220V AC mains power input from the power grid into DC power and input it into the DC-DC module to charge the supercapacitor group. On the other hand, it can convert the remaining power of the supercapacitor output by the DC-DC module into AC power and feed it back to the power grid. Figure 2 As shown, the Pwm_Buck pin, PWM_FW_1 pin and PWM_FW_2 pin of the main control module are respectively connected to the three gate controllers U1, gate controller U2 and gate controller U3 of the DC-DC boost module. The main control module sends PWM signals through three pins to realize the boost control of the DC-DC boost module. In addition, the boost module also provides 5V DC power supply to the main control module.

[0025] Among them, the model of the AC / DC bidirectional power supply in the embodiment of the utility model is BIC-2200-48, the model of the main control module is TMS320F28035PAG, the model of the supercapacitor group is M20W-060-0150, and the model of the IGBT module is FS200R07A1E3. Of course, the models of the above components are only one embodiment of the utility model, and those skilled in the art can select other suitable models according to actual needs to implement the content of the utility model.

[0026] The specific working process of the utility model is described in detail below:

[0027] During charging, the AC / DC bidirectional power supply converts 220V AC mains power into DC power, and the DC-DC module charges the supercapacitor group to the set voltage. Then the main control module controls the IGBT module to output a pulse voltage to act on the metal sample to be tested, thereby generating a large pulse current. When the supercapacitor group needs to reduce the voltage or the equipment completes its work, the energy stored in the supercapacitor group is boosted by the DC-DC module and input into the AC / DC bidirectional power supply, which is then converted into 220V AC power and fed back to the grid for energy recovery, thereby achieving the purpose of discharging and reducing the voltage.

[0028] The utility model adopts a discharge mode of energy feedback to the power grid, does not need a relay for discharge control, is energy-saving, environmentally friendly and has good safety.

[0029] refer to Figure 1 As shown, the utility model also relates to a pulse current testing system, including an oscilloscope, a host computer and the above-mentioned pulse power supply with feeder grid discharge, the oscilloscope is used to read the pulse current output by the IGBT module, and the host computer is communicatively connected with the main control module.

[0030] It should be noted that after the user sets the working voltage, pulse time, working cycle and other parameters through the software of the host computer and sends them to the main control module, the main control module controls the DC-DC module to charge the supercapacitor group to the set voltage, and then the main control module controls the IGBT module to output the pulse voltage to act on the metal sample to be tested to generate a large pulse current. The generated pulse current reads the current value through the current probe of the oscilloscope. The size of the pulse current is determined by the pulse voltage and the resistance of the sample. When the supercapacitor group needs to reduce the voltage or the equipment completes the work, the energy stored in the supercapacitor group is boosted by the DC-DC module and input to the V AC / DC bidirectional power supply, and then converted by the AC / DC bidirectional power supply into 220V AC power and fed back to the power grid for energy recovery, thereby achieving the purpose of discharging and reducing the voltage.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pulse power supply with grid-fed discharge, characterized in that: include: An AC / DC bidirectional power supply, one end of which is connected to a power grid; A DC-DC module, wherein the other end of the AC-DC bidirectional power supply is connected to one end of the DC-DC module; A supercapacitor group, the other end of the DC-DC module is connected to the supercapacitor group; IGBT module, the super capacitor group is connected to the input end of the IGBT module; A sample connection end, the sample connection end is used to connect a metal sample to be tested, and the output end of the IGBT module is connected to the sample connection end; A main control module, wherein the first output end of the main control module is connected to the control end of the DC-DC module, and the second output end of the main control module is connected to the control end of the IGBT module, so as to control the DC-DC module to charge the supercapacitor group during the test, and then control the IGBT module to output a pulse current to the metal sample to be tested. After the test is completed, the DC-DC module is controlled to boost the voltage of the supercapacitor group and input it into an AC / DC bidirectional power supply, and the DC power is converted into AC power through the AC / DC bidirectional power supply and fed back to the power grid for discharge.

2. The pulse power supply with grid-fed discharge according to claim 1, characterized in that: The model of the AC / DC bidirectional power supply is BIC-2200-48.

3. The pulse power supply with grid-fed discharge according to claim 1, characterized in that: The model of the main control module is TMS320F28035PAG.

4. The pulse power supply with grid-fed discharge according to claim 1, characterized in that: The model of the supercapacitor bank is M20W-060-0150.

5. The pulse power supply with grid-fed discharge according to claim 1, characterized in that: The model of the IGBT module is FS200R07A1E3.

6. A pulse current testing system, characterized in that: It comprises an oscilloscope, a host computer and a pulse power supply with grid-fed discharge as claimed in any one of claims 1 to 5, wherein the oscilloscope is used to read the pulse current output by the IGBT module, and the host computer is communicatively connected with the main control module.

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