CN213585605U - Multi-output pulse power supply - Google Patents
Multi-output pulse power supply Download PDFInfo
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- CN213585605U CN213585605U CN202022227818.0U CN202022227818U CN213585605U CN 213585605 U CN213585605 U CN 213585605U CN 202022227818 U CN202022227818 U CN 202022227818U CN 213585605 U CN213585605 U CN 213585605U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
A multiplexed output pulsed power supply comprising: an alternating current input circuit, the input end of which is connected with an external power supply; a rectifying unit having an input terminal, a positive output terminal and a negative input terminal, the input terminal of the rectifying unit being connected to the output terminal of the AC input circuit; the pulse output units each comprise a semiconductor silicon carbide transistor module and an output transformer; the source electrode of the semiconductor silicon carbide transistor module is connected with the negative input end of the rectifying unit, and the primary side of an output transformer is connected in series between the drain electrode and the positive output end of the rectifying unit; and the control and drive assembly is respectively connected with the alternating current input circuit and the grid electrodes of the semiconductor silicon carbide transistor modules. The embodiment of the utility model provides a through letting the rectification unit connect a plurality of pulse output unit, and then can arouse multiplexed output pulse through control and drive assembly. The output frequency and amplitude of the output pulse can be adjusted through the control and drive assembly, the alternating current input circuit and the pulse output unit.
Description
Technical Field
The utility model belongs to the power field, concretely relates to multiplexed output pulse power supply.
Background
The magnetron sputtering pulse power supply is used in the pulse electroplating process, when the current is conducted, the pulse (peak value) current is several times or even dozens of times of the common direct current, and the instantaneous high current density enables metal ions to be reduced under extremely high overpotential, so that the grains of a deposition layer become thin; when the current is cut off, the discharge ions near the cathode region are restored to the initial concentration again, the concentration polarization is eliminated, high pulse (peak value) current density is continuously used in the next pulse period, and meanwhile, the phenomena of recrystallization, adsorption and desorption and the like which are favorable for a deposition layer are accompanied in the cut-off period. Such a process is synchronized throughout the entire electroplating process, and the mechanisms involved therein constitute the most fundamental principles of pulse plating. Practice proves that the pulse power supply has incomparable advantages over the traditional direct current plating in the aspects of refining crystallization, improving physical and chemical properties of a plating layer, saving precious metals and the like.
However, the magnetron sputtering pulse power supply used at present only has one output and does not have the capability of multi-output, and under the condition that a plurality of outputs are required, only a plurality of magnetron sputtering pulse power supplies can be adopted to work together, so that on one hand, the operation is not easy, and on the other hand, the cost is easily increased. In addition, the amplitude and frequency of the output voltage of the magnetron sputtering pulse power supply are adjusted more complicated, and usually, the adjustment is realized by changing a hardware circuit.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a multiplexed output pulse power supply, multiplexed output pulse power supply has solved can only single output, and output voltage's amplitude and frequency adjustment comparatively complicated problem.
According to the utility model discloses multiplexed output pulse power supply, include: the input end of the alternating current input circuit is connected with an external power supply and is used for filtering, regulating and boosting alternating current input by the external power supply; a rectifying unit having an input terminal, a positive output terminal, and a negative input terminal, the input terminal of the rectifying unit being connected to the output terminal of the AC input circuit; the pulse output units each comprise a semiconductor silicon carbide transistor module and an output transformer; the source electrode of the semiconductor silicon carbide transistor module is connected with the negative input end of the rectifying unit, the primary side of the output transformer is connected in series between the drain electrode and the positive output end of the rectifying unit, and the secondary side of the output transformer is used for outputting pulses; and the control and drive assembly is respectively connected with the alternating current input circuit and the grids of the semiconductor silicon carbide transistor modules and is used for adjusting the output voltage of the alternating current input circuit and driving the semiconductor silicon carbide transistor modules to work.
According to the utility model discloses multiplexed output pulse power supply has following technological effect at least: through letting the rectifier unit connect a plurality of pulse output units, provide the basis of multiplexed output, and then can excite multiplexed output pulse through a plurality of pulse output units of control and drive assembly drive. The external input voltage can be adjusted through the control and drive assembly and the alternating current input circuit, so that the output amplitude of the output transformer can be adjusted; the output pulse output frequency can be adjusted by the control and drive component and the pulse output unit. In addition, the output amplitude and the output frequency are adjusted through the control and driving assembly, a hardware circuit does not need to be modified, and the adjustment can be completed only through the control and driving assembly.
According to some embodiments of the invention, the ac input circuit comprises: a filter circuit, an input end of which is connected with the external power supply; the digital voltage regulator is provided with an input end, an output end and a control end, wherein the input end of the digital voltage regulator is connected with the output end of the filter circuit, and the control end of the digital voltage regulator is connected with the control and drive assembly; and the input end of the main transformer is connected with the output end of the digital voltage regulator, and the output end of the main transformer is connected with the input end of the rectifying unit.
According to some embodiments of the invention, the control and drive assembly comprises: a drive amplifier circuit, the output end of which is connected with the grid electrodes of the semiconductor silicon carbide transistor modules; the processor unit is respectively connected with the input end of the driving amplification circuit and the control end of the digital voltage regulator; the display controller is connected with the processor unit; and the auxiliary power supply module is used for providing a control power supply.
According to some embodiments of the utility model, above-mentioned multiplexed output pulse power supply still include a plurality ofly all with the sampling circuit that the treater unit is connected, it is a plurality of sampling circuit and a plurality of output transformer's output one-to-one sets up, every sampling circuit all is used for gathering and corresponds the setting output transformer's output voltage.
According to some embodiments of the present invention, the above-mentioned multiplexed output pulse power supply further comprises a plurality of interruption contactors, a plurality of which are connected to the processor unit, the interruption contactors being respectively used for disconnecting the plurality of loops of the pulse output unit.
According to some embodiments of the utility model, above-mentioned multiplexed output pulse power supply still include with the temperature and humidity sensor that the treater unit is connected.
According to some embodiments of the present invention, the above-mentioned multiplexed output pulse power supply further comprises a wireless communication module connected to the processor unit.
According to some embodiments of the utility model, show the accuse ware and adopt liquid crystal touch-sensitive screen.
According to some embodiments of the present invention, the drive amplifier circuit comprises at least one drive amplifier unit, each the input of the drive amplifier unit all with the processor unit is connected, and the gate of at least one semiconductor silicon carbide transistor module is connected to the output.
According to some embodiments of the invention, the drive amplification unit comprises: the input end of the optical coupling isolator is connected with the processor unit; and the input end of the operational amplifier amplifying unit is connected with the output end of the optical coupling isolator, and the output end of the operational amplifier amplifying unit is connected with the grid of the semiconductor silicon carbide transistor module.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic circuit diagram of a multi-output pulse power supply according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a drive amplification unit according to an embodiment of the present invention;
figure 3 is a schematic diagram of a semiconductor silicon carbide transistor module according to an embodiment of the present invention.
Reference numerals:
an AC input circuit 100, a filter circuit 110, a digital voltage regulator 120, a main transformer 130,
A rectifying unit 200,
Semiconductor silicon carbide transistor module 310, output transformer 320,
A driving amplifying circuit 410, a driving amplifying unit 411, a processor unit 420, a display controller 430, an auxiliary power module 440,
A sampling circuit 500,
An interrupting contactor 600,
A temperature and humidity sensor 700,
A wireless communication module 800.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
A multi-output pulse power supply according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
According to the utility model discloses multiplexed output pulse power supply, including exchanging input circuit 100, rectifier unit 200, control and drive assembly, a plurality of pulse output unit. An ac input circuit 100, an input end of which is connected to an external power supply, for filtering, regulating voltage, and boosting ac power input from the external power supply; a rectifying unit 200 having an input terminal, a positive output terminal, and a negative input terminal, the input terminal of which is connected to the output terminal of the ac input circuit 100; a plurality of pulse output units, each of which includes a semiconductor silicon carbide transistor module 310, an output transformer 320; the source of the semiconductor silicon carbide transistor module 310 is connected with the negative input end of the rectifying unit 200, the primary side of the output transformer 320 is connected in series between the drain and the positive output end of the rectifying unit 200, and the secondary side of the output transformer 320 is used for outputting pulses; and the control and drive assembly is respectively connected with the alternating current input circuit 100 and the gates of the plurality of semiconductor silicon carbide transistor modules 310, and is used for adjusting the output voltage of the alternating current input circuit 100 and driving the semiconductor silicon carbide transistor modules 310 to work. Generally, the ac input circuit 100, the rectifying unit 200, the control and driving assembly, and the plurality of pulse output units are disposed in the housing of the multi-output pulse power supply according to the embodiment of the present invention.
Referring to fig. 1 to 3, the ac input circuit 100 is connected to an external power source, and filters, adjusts and boosts ac power input from the external power source to reach a desired voltage value. A voltage regulator is usually used for pressure regulation, and the voltage regulator can realize numerical control pressure regulation through an external control device. The utility model discloses an in some embodiments, in order to simplify the design and be convenient for control, directly used digital voltage regulator 120, control and drive assembly output pressure regulating signal to digital voltage regulator 120 after, digital voltage regulator 120 can adjust the voltage value that the pressure regulating signal corresponds.
The rectifying unit 200 rectifies the ac power processed by the ac input circuit 100 into dc power for generating a controllable pulse voltage. The rectifying unit 200 may be an existing rectifying circuit, or may be a commercially available rectifying module. The rectifying unit 200 is connected to a plurality of pulse output units, and provides a basis for outputting multiple pulses.
The pulse output unit is a basis for controlling pulse generation, and the primary side of the output transformer 320 is controlled to be switched on and off through the semiconductor silicon carbide transistor module 310, so that pulses can be generated. The frequency of the pulse generation can be controlled by controlling the frequency of the semiconductor silicon carbide transistor module 310 to be switched on and off through the control and drive component outputting a drive signal.
The core device of the semiconductor silicon carbide transistor module 310 is a semiconductor silicon carbide transistor, namely, a SiC-MOSFET, which has electrical characteristics of wide forbidden band, high breakdown electric field, high saturation drift velocity and high thermal conductivity, and under the same voltage withstanding level, the parasitic capacitance of the semiconductor silicon carbide transistor is far smaller than that of other devices, the reliability of the semiconductor silicon carbide transistor module is 10 times that of a common si semiconductor device, the thermal conductivity is improved by 3 times, the topological structure of a circuit can be simplified, and the pulse control reliability is greatly improved.
According to the utility model discloses multiplexed output pulse power supply through letting rectifier unit 200 connect a plurality of pulse output unit, provides the basis of multiplexed output, and then can excite multiplexed output pulse through a plurality of pulse output unit of control and drive assembly drive. The external input voltage can be adjusted through the control and drive component and the alternating current input circuit 100, and further the output amplitude of the output transformer 320 can be adjusted; the output pulse output frequency can be adjusted by the control and drive component and the pulse output unit. In addition, the output amplitude and the output frequency are adjusted through the control and driving assembly, a hardware circuit does not need to be modified, and the adjustment can be completed only through the control and driving assembly.
In some embodiments of the present invention, referring to fig. 3, the semiconductor sic transistor module 310 includes a semiconductor sic transistor, an input capacitor bank composed of a capacitor C1 and a capacitor C2, the capacitor C1 is connected in parallel between the drain and the gate of the semiconductor sic transistor, the capacitor C1 is connected in parallel between the source and the gate of the semiconductor sic transistor, and the output capacitor C3 is further included, and the output capacitor C3 is connected to the drain and the source of the semiconductor sic transistor respectively.
In some embodiments of the present invention, referring to fig. 1, the ac input circuit 100 includes: filter circuit 110, digital voltage regulator 120, main transformer 130. A filter circuit 110 having an input terminal connected to an external power supply; a digital voltage regulator 120 having an input terminal, an output terminal, and a control terminal, wherein the input terminal is connected to the output terminal of the filter circuit 110, and the control terminal is connected to the control and driving component; the main transformer 130 has an input end connected to the output end of the digital voltage regulator 120, and an output end connected to the input end of the rectifying unit 200. The filter circuit 110 can filter the ac power inputted from the external power source to improve the quality of the ac power, and then the amplitude of the ac power can be adjusted by the digital transformer, so that the main transformer 130 can boost the ac power to reach the required amplitude. The digital voltage regulator 120 is arranged at the front end of the main transformer 130, so that the voltage regulating range of the digital voltage regulator 120 can be reduced, the digital voltage regulator 120 can select a product with lower cost, and the cost is effectively controlled. After the digital voltage regulator 120 is connected to the processor unit 420, the processor unit 420 may send a voltage regulating signal to change the resistance.
In some embodiments of the present invention, referring to fig. 1, the control and drive assembly comprises: a driving amplifying circuit 410, a processor unit 420 and a display controller 430. A drive amplifier circuit 410 having an output terminal connected to the gates of the plurality of semiconductor silicon carbide transistor modules 310; a processor unit 420, which is respectively connected to the input terminal of the driving amplifying circuit 410 and the control terminal of the digital voltage regulator 120; a display controller 430 connected to the processor unit 420; and an auxiliary power supply module 440 for providing control power. The processor unit 420 is a control core of the entire pulse power supply, and may transmit the voltage regulating signal to the digital transformer, and may transmit the pulse signal to the driving amplification circuit 410. After receiving the pulse signal, the driving amplifier circuit 410 outputs a driving signal to the gate of the semiconductor silicon carbide transistor module 310, so that the output transformer 320 can output a pulse. Display controller 430 may be used to view data received by processor unit 420 and some parameters built in, and may also modify such parameters, for example: the amplitude and frequency of the output pulses can be modified, the actual amplitude and frequency of the output pulses can be viewed, and the temperature and humidity in the enclosure can be viewed. In some embodiments of the present invention, the processor unit 420 may employ a PLC, a DSP, a single chip or an ARM as a core controller. In some embodiments of the utility model, adopted the singlechip as the core control ware of processor unit 420, selected STM32 series singlechip, specifically can select STM32F 407. In some embodiments of the present invention, in order to increase the speed of data processing, a DSP is used as a core controller.
In some embodiments of the present invention, referring to fig. 1, the above-mentioned multiplexed output pulse power supply further includes a plurality of sampling circuits 500 all connected to the processor unit 420, the output ends of the sampling circuits 500 and the output transformers 320 are arranged in a one-to-one correspondence manner, and each sampling circuit 500 is used for collecting the output voltage of the output transformer 320 arranged in a corresponding manner. The sampling circuit 500 can collect the frequency and amplitude of the output pulse of the output transformer 320 for feedback to the processor unit 420, so that the processor unit 420 can modify the amplitude and frequency, which is equivalent to a feedback control process, so that the output frequency and amplitude can be stabilized within a specific error range. The sampling circuit 500 may use existing circuit acquisition and voltage acquisition circuits and may use a transformer as a core sensor. In practical engineering, if the number of sampling circuits 500 is too large, the ADC port may be absent from the processor unit 420, and the data acquisition card may be used to perform intermediate conversion data concentration and transfer.
In some embodiments of the present invention, referring to fig. 1, the multi-output pulse power supply further includes a plurality of interrupt contactors 600 connected to the processor unit 420, wherein the interrupt contactors 600 are respectively used for disconnecting the loops of the pulse output units. The interrupt contactor 600 is provided to quickly terminate the input of the transformer 320, compared to stopping the input of the transformer 320 by driving the amplifying circuit 410. The interrupt contactor 600 uses a normally closed contact connection, which allows for stability of the connection. In practical engineering, if the number of the interrupt contactors 600 is too large, the processor unit 420 may lack an I/O port, and the serial-to-parallel port module may be used to assist in on-off control.
In some embodiments of the present invention, referring to fig. 1, the multi-output pulse power supply further includes a temperature and humidity sensor 700 connected to the processor unit 420. Temperature and humidity sensor 700 can gather temperature and humidity data in the casing, can be and during high temperature or humidity are too high, send the early warning through display accuse ware 430 or wireless communication module 800 to avoid dangerous situation in advance, prevent the emergence of accident. In some embodiments of the present invention, the temperature and humidity sensor 700 directly adopts a swiss sensing digital temperature and humidity sensor SHT20, and the SHT20 is provided with 4C generation
The chip adopts a standard I2C protocol for communication, is provided with a capacitance type relative humidity sensor and a band gap temperature sensor, and also comprises an amplifier, an A/D converter, an OTP memory and a digital processing unit, can accurately measure the internal temperature and the relative humidity of equipment, and has extremely low power consumption and strong stability.
In some embodiments of the present invention, referring to fig. 1, the multi-output pulse power supply further includes a wireless communication module 800 connected to the processor unit 420. Can realize long-range control through wireless communication module 800, there are a plurality ofly at the scene the utility model discloses a multiplexed output pulse power supply when together operating, only need set up a high technical staff centralized monitoring at remote monitoring end can, can effectual reduction to local operating personnel's technical requirement.
In some embodiments of the present invention, referring to fig. 1, the display controller 430 adopts a liquid crystal touch screen, and the liquid crystal touch screen is disposed on the housing. The liquid crystal touch screen on the market at present is low in price, stable in performance and suitable for large-scale use, and the operation of the liquid crystal touch screen is simpler and more convenient compared with a keyboard.
In some embodiments of the present invention, referring to fig. 1 and 2, the driving amplifying circuit 410 includes at least one driving amplifying unit 411, an input terminal of each driving amplifying unit 411 is connected to the processor unit 420, and an output terminal is connected to the gate of at least one semiconductor silicon carbide transistor module 310. A drive amplifier unit 411 may be used to simultaneously control one or more semiconductor silicon carbide transistor modules 310, and may be specifically configured to route wiring according to actual requirements. In some embodiments of the present invention, to enable the processor unit 420 to control a single driver amplifier unit 411, each driver amplifier unit 411 may be connected to a different interface of the processor unit 420.
In some embodiments of the present invention, referring to fig. 2, the driving amplification unit 411 includes: an optocoupler isolator, the input of which is connected to the processor unit 420; and the input end of the operational amplifier amplifying unit is connected with the output end of the optical coupling isolator, and the output end of the operational amplifier amplifying unit is connected with the grid electrode of the semiconductor silicon carbide transistor module 310. The operational amplifier U2 and the triode VT1 and the triode VT2 are connected in parallel to form an operational amplifier unit, the input end of the optocoupler U1 is connected with the processor unit 420, the output end of the operational amplifier U2 is connected with the operational amplifier unit, and the output end of the operational amplifier unit is connected with the semiconductor silicon carbide transistor module 310 through a gate resistor Rn. In some embodiments of the present invention, the triode VT1 and the triode VT2 are particularly IXDD614 triodes, which not only can satisfy the requirements of high speed, low transmission delay, low output impedance and low energy consumption of the driving circuit.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A multiple output pulsed power supply, comprising:
the input end of the alternating current input circuit (100) is connected with an external power supply and is used for filtering, regulating and boosting alternating current input by the external power supply;
a rectifying unit (200) having an input, a positive output and a negative input, the input of which is connected to the output of the AC input circuit (100);
a plurality of pulse output units, each pulse output unit comprising a semiconductor silicon carbide transistor module (310), an output transformer (320); the source electrode of the semiconductor silicon carbide transistor module (310) is connected with the negative input end of the rectifying unit (200), the primary side of the output transformer (320) is connected in series between the drain electrode and the positive output end of the rectifying unit (200), and the secondary side of the output transformer (320) is used for outputting pulses;
and the control and drive assembly is respectively connected with the alternating current input circuit (100) and the grid electrodes of the semiconductor silicon carbide transistor modules (310) and is used for adjusting the output voltage of the alternating current input circuit (100) and driving the semiconductor silicon carbide transistor modules (310) to work.
2. The multi-output pulsed power supply according to claim 1, characterized in that the ac input circuit (100) comprises:
a filter circuit (110) having an input terminal connected to the external power supply;
a digital voltage regulator (120) having an input terminal, an output terminal, and a control terminal, wherein the input terminal is connected to the output terminal of the filter circuit (110), and the control terminal is connected to the control and driving assembly;
and the input end of the main transformer (130) is connected with the output end of the digital voltage regulator (120), and the output end of the main transformer is connected with the input end of the rectifying unit (200).
3. The multi-output pulsed power supply of claim 2, wherein said control and drive assembly comprises:
a drive amplifier circuit (410) having an output terminal connected to the gates of the plurality of semiconductor silicon carbide transistor modules (310);
the processor unit (420) is respectively connected with the input end of the driving amplification circuit (410) and the control end of the digital voltage regulator (120);
a display controller (430) connected with the processor unit (420);
and an auxiliary power supply module (440) for providing control power.
4. The multi-output pulse power supply according to claim 3, further comprising a plurality of sampling circuits (500) connected to the processor unit (420), wherein the plurality of sampling circuits (500) are disposed in a one-to-one correspondence with output ends of the plurality of output transformers (320), and each sampling circuit (500) is configured to collect an output voltage of the output transformer (320) disposed in a corresponding manner.
5. The multi-output pulse power supply according to claim 3 or 4, further comprising a plurality of interruption contactors (600) each connected to the processor unit (420), wherein the plurality of interruption contactors (600) are respectively used for disconnecting a loop of the plurality of pulse output units.
6. The multi-output pulsed power supply of claim 3, further comprising a temperature and humidity sensor (700) connected to said processor unit (420).
7. The multi-output pulsed power supply of claim 3, further comprising a wireless communication module (800) connected to said processor unit (420).
8. The multi-output pulse power supply of claim 3, wherein the display controller (430) is a liquid crystal touch screen.
9. The multi-output pulse power supply according to claim 3, wherein the driving amplification circuit (410) comprises at least one driving amplification unit (411), each driving amplification unit (411) has an input end connected to the processor unit (420) and an output end connected to the gate of at least one semiconductor silicon carbide transistor module (310).
10. The multi-output pulse power supply according to claim 9, wherein the driving amplification unit (411) comprises:
an opto-isolator, the input of which is connected to the processor unit (420);
and the input end of the operational amplifier amplifying unit is connected with the output end of the optical coupling isolator, and the output end of the operational amplifier amplifying unit is connected with the grid electrode of the semiconductor silicon carbide transistor module (310).
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| CN115343637A (en) * | 2022-10-20 | 2022-11-15 | 武汉源畅科技有限公司 | Storage battery internal resistance testing device and testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115343637A (en) * | 2022-10-20 | 2022-11-15 | 武汉源畅科技有限公司 | Storage battery internal resistance testing device and testing method |
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