CN112904926A - Multi-electrode voltage generator - Google Patents
Multi-electrode voltage generator Download PDFInfo
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- CN112904926A CN112904926A CN202110196001.8A CN202110196001A CN112904926A CN 112904926 A CN112904926 A CN 112904926A CN 202110196001 A CN202110196001 A CN 202110196001A CN 112904926 A CN112904926 A CN 112904926A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
Abstract
The invention discloses a multi-electrode voltage generator, comprising: the power supply comprises a plurality of power supplies, a control device and a plurality of single-electrode voltage generating devices, wherein the first input end of each single-electrode voltage generating device is connected with the positive electrode of one power supply, the second input end of each single-electrode voltage generating device is connected with the negative electrode of the power supply, the third input end of each single-electrode voltage generating device is connected with the control device, and the single-electrode voltage generating devices are used for outputting voltage with a positive electrode and a negative electrode according to a driving signal sent by the control device and carrying out double isolation between the voltage with the positive electrode and the negative electrode and the driving. The control device controls the connection state of a plurality of single-electrode voltage generating devices and controls a plurality of power outputs to have the voltages of the positive electrode and the negative electrode, thereby generating multi-electrode voltage.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a multi-electrode voltage generator.
Background
Multi-electrode control and detection have applications in many fields such as medical ablation, ion implantation in integrated circuit manufacturing processes, military high-voltage ignition equipment, and industrial metallurgy. The adoption of multiple electrodes has the advantages that: 1) the electric field with a desired shape can be formed by different positions of a plurality of electrodes; 2) energy is gathered at the same point through discharging between a plurality of positive and negative electrodes, and the energy of the gathering point is improved; 3) the electric field energy is equally divided by controlling the discharge of a plurality of electrodes, and the electrode jitter is reduced. At present, the control and detection modes of multiple electrodes are various: 1) the multi-electrode control is realized through a plurality of high-voltage generators, each high-voltage generator outputs two electrodes, and the adjustment and the control of the electrodes are realized through adjusting the control of the high-voltage generators; 2) the single-electrode control loop is composed of a comparison amplifying circuit, a reverse amplifying circuit and a feedback circuit, so that multi-electrode control and detection are realized; 3) the electric signals are transmitted through the antenna, then are sent to the electrodes through rectification, and the power supply condition of each electrode is known through the onboard controller, so that the control of each electrode is realized; 4) the power amplification unit is used for transmitting radio-frequency signals to the high-frequency transformer, the high-frequency boosting voltage is transmitted to the filter circuit to output the radio-frequency signals, then the output power monitoring unit is used for realizing electrode output and detection, and the multi-electrode is realized by expanding double electrodes. The current multi-electrode control and detection implementation scheme has the following defects: 1) high cost and difficult manufacturing; 2) the control mode is complex; 3) the protective measures are imperfect; 4) the utilization efficiency is low; 5) the switching speed of the electrodes is slow; 6) the modularization degree is not high; 7) the insulation between the multi-electrode voltage and the control system is poor.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor insulation between strong and weak electrodes between multi-electrode voltage control and detection modules in the prior art, which results in poor safety, thereby providing a multi-electrode voltage generator.
In order to achieve the purpose, the invention provides the following technical scheme:
an embodiment of the present invention provides a multi-electrode voltage generator, including: the first input end of each single-electrode voltage generating device is connected with the positive electrode of one power supply, the second input end of each single-electrode voltage generating device is connected with the negative electrode of the power supply, the third input end of each single-electrode voltage generating device is connected with the control device, and the single-electrode voltage generating devices are used for outputting voltage with the positive electrode and the negative electrode according to driving signals sent by the control devices and carrying out double isolation between the voltage with the positive electrode and the negative electrode and the driving signals.
In one embodiment, a single electrode voltage generating device includes: the positive electrode voltage generating circuit comprises a positive electrode voltage generating circuit, a negative electrode voltage generating circuit and an electrode voltage output end, wherein the first input end of the positive electrode voltage generating circuit is connected with the positive electrode of a power supply, the second input end of the positive electrode voltage generating circuit is connected with the control device, the output end of the positive electrode voltage generating circuit is connected with the electrode voltage output end, and the positive electrode voltage generating circuit is used for outputting positive electrode power supply voltage according to a first driving signal sent by the control device and carrying out double isolation between the positive electrode power supply voltage and the first driving signal; the first input end of the negative electrode voltage generating circuit is connected with the negative electrode of a power supply, the second input end of the negative electrode voltage generating circuit is connected with the control device, and the output end of the negative electrode voltage generating circuit is connected with the electrode voltage output end and used for outputting negative electrode power supply voltage according to a second driving signal sent by the control device and carrying out double isolation between the negative electrode power supply voltage and the first driving signal.
In one embodiment, the positive electrode voltage generating circuit and the negative electrode voltage generating circuit each include: the input end of the first isolation circuit is connected with the control device, and the output end of the first isolation circuit is connected with the first input end of the second isolation circuit and used for being in a conducting state or a switching-off state according to a first driving signal or a second driving signal; the second input end of the second isolating circuit is connected with the positive electrode or the negative electrode of a power supply, the output end of the second isolating circuit is connected with the electrode voltage output end, and the second isolating circuit is used for connecting the positive electrode or the negative electrode of the power supply with the electrode voltage output end when the first isolating circuit is in a conducting state, and the electrode voltage output end outputs positive electrode power supply voltage or negative electrode power supply voltage.
In one embodiment, the first isolation circuit includes: the input end of the first driving circuit is connected with the control device, the output end of the first driving circuit is connected with the input end of the optical coupling isolation circuit, and the output end of the optical coupling isolation circuit is connected with the first input end of the second isolation circuit and used for controlling the on or off of the optical coupling isolation circuit according to the first driving signal or the second driving signal.
In one embodiment, the first driving circuit includes: the first switch tube, the first driving power supply and the first gate pole circuit, wherein the first end of the first gate pole circuit is connected with the output end of the control device, the second end of the first gate pole circuit is connected with the control end of the first switch tube, and the third end of the first gate pole circuit is grounded; the first end of the first switch tube is connected with the anode of the first driving power supply through a first pull-up resistor, the second end of the first switch tube is connected with the first input end of the optical coupling isolation circuit, and the second input end of the optical coupling isolation circuit is grounded; the negative electrode of the first driving power supply is grounded.
In one embodiment, the second isolation circuit includes: the first end of the second gate circuit is connected with the first output end of the optical coupling isolation circuit, the second end of the second gate circuit is grounded, and the third end of the second gate circuit is connected with the control end of the second switch tube; the first end of the second switching tube is connected with the positive electrode of the second driving power supply, and is connected with the second output end of the optical coupling isolation circuit through a second pull-up resistor, and the second end of the second switching tube is connected with the first end of the high-voltage relay; the second end of the high-voltage relay is connected with the negative electrode of the second driving power supply, the third end of the high-voltage relay is connected with the positive electrode or the negative electrode of the power supply, and the fourth end of the high-voltage relay is suspended; when the optical coupling isolation circuit is switched on, the second gate circuit controls the second switching tube to be switched on, the high-voltage relay is electrified, the electrode voltage output end is connected with the anode or the cathode of the power supply through the third end of the high-voltage relay, and the electrode voltage output end outputs positive electrode power supply voltage or negative electrode power supply voltage; when the optical coupling isolation circuit is disconnected, the second gate circuit controls the second switch tube to be disconnected, the high-voltage relay is powered off, the electrode voltage output end is connected with the fourth end of the high-voltage relay, and the electrode voltage output end is disconnected with the power supply.
In one embodiment, the multi-electrode voltage generator further includes: the first input end of the voltage acquisition circuit is connected with the output end of a positive electrode voltage generation circuit in any one single-electrode voltage generation device, and the second input end of the voltage acquisition circuit is connected with the output end of a negative electrode voltage generation circuit in the single-electrode voltage generation device and is used for acquiring a positive electrode power supply voltage and a negative electrode power supply voltage; the first input end of the current collecting circuit is connected with the output end of a positive electrode voltage generating circuit in any one single electrode voltage generating device, and the second input end of the current collecting circuit is connected with the output end of a negative electrode voltage generating circuit in the single electrode voltage generating device and is used for collecting currents output by the positive electrode voltage generating circuit and the negative electrode voltage generating circuit; the control device performs feedback regulation on the output voltage of all the power supplies according to the positive electrode power supply voltage, the negative electrode power supply voltage, and the currents output by the positive electrode voltage generating circuit and the negative electrode voltage generating circuit.
In one embodiment, the voltage acquisition circuit includes: a series resistance acquisition circuit, a first differential amplification circuit, a first addition circuit and a first isolation high-speed signal acquisition circuit,
the series resistance acquisition circuit comprises two input ends and two output ends, each input end is connected with the output end of the positive electrode voltage generation circuit or the output end of the negative electrode voltage generation circuit, and the series resistance acquisition circuit is used for dividing the voltage output by the output end of the positive electrode voltage generation circuit or the negative electrode voltage generation circuit to obtain a first voltage signal; two input ends of the first differential amplification circuit are correspondingly connected with two input ends of the series resistance acquisition circuit, and the first differential amplification circuit is used for amplifying a first voltage signal; the input end of the first adding circuit is connected with the output end of the first differential amplifying circuit and is used for converting a negative voltage signal in the amplified first voltage signal into a first positive voltage signal and keeping the positive voltage signal in the first voltage signal to be a positive voltage signal constantly; the input end of the first isolation high-speed signal acquisition circuit is connected with the input end of the first addition circuit and used for isolating the first voltage signal output by the first addition circuit to obtain a first high-voltage signal.
In one embodiment, a current acquisition circuit includes: the parallel resistance acquisition circuit comprises two input ends and two output ends, each input end is connected with the output end of the positive electrode voltage generation circuit or the output end of the negative electrode voltage generation circuit, and the parallel resistance acquisition circuit is used for converting the corresponding electrode current output by the output end of the positive electrode voltage generation circuit or the negative electrode voltage generation circuit into a second voltage signal; two input ends of the second differential amplification circuit are correspondingly connected with two input ends of the parallel resistance acquisition circuit, and the second differential amplification circuit is used for amplifying a second voltage signal; the input end of the second adding circuit is connected with the output end of the second differential amplifying circuit and is used for converting a negative voltage signal in the amplified second voltage signal into a second positive voltage signal and keeping the positive voltage signal in the second voltage signal to be a positive voltage signal constantly; the input end of the second isolation high-speed signal acquisition circuit is connected with the input end of the second addition circuit and used for isolating the second voltage signal output by the second addition circuit to obtain a second high-voltage signal.
In one embodiment, the multi-electrode voltage generator further includes: the input end of each short-circuit protection circuit is connected with the output end of the control device, the output end of each short-circuit protection circuit is connected with the input end of one single-electrode voltage generating device and used for generating an enabling signal according to a first driving signal and a second driving signal, and the first isolation circuit is in a conducting state or a turn-off state according to the first driving signal and the enabling signal or according to the second driving signal and the enabling signal.
In one embodiment, each short-circuit protection circuit includes: the input end of the AND gate logic chip is connected with the output end of the control device, the output end of the AND gate logic chip is connected with the input end of the NAND gate logic chip, the output end of the NOT gate logic chip is connected with the cathode of the diode, and the anode of the diode is connected with the input end of a single-electrode voltage generating device.
The technical scheme of the invention has the following advantages:
1. the control device controls the connection state of a plurality of single-electrode voltage generating devices, and controls a plurality of power supplies to output voltages with positive and negative electrodes, thereby generating multi-electrode voltages.
2. The single-electrode voltage generating device comprises a first isolating circuit and a second isolating circuit, and the control circuit controls the on-off state of the first isolating circuit to control the on-off state of the second isolating circuit, so that the voltage with a positive electrode and a negative electrode is output, and double isolation between strong current and weak current is realized.
3. According to the multi-electrode voltage generator, the short-circuit protection circuit generates the enabling signal according to the first driving signal and the second driving signal, the enabling signal is combined with the first driving signal or the second driving signal to control the on-off state of the first isolation circuit, so that a plurality of power supplies are prevented from outputting voltage, meanwhile, short-circuit protection can be realized only by using a NAND gate, and design cost and design difficulty are reduced; the power supply of the power supply circuit is connected with the acquisition circuit through the high-voltage relay, so that double isolation between strong current and weak current is realized.
4. According to the multi-electrode voltage generator provided by the invention, the control device carries out feedback regulation on each power supply according to the voltage and current acquired by the voltage acquisition circuit and the current acquisition circuit, and meanwhile, the voltage acquisition circuit and the current acquisition circuit use the high-speed linear optocoupler to build the acquisition circuit, so that the signal acquisition rate and the anti-interference capability are improved, the signal acquisition range is expanded, and the system function requirements are indirectly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of a specific example of a multi-electrode voltage generator according to an embodiment of the present invention;
FIG. 2 is a block diagram of another specific example of a multi-electrode voltage generator according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a configuration of a specific example of a single-electrode voltage generator according to an embodiment of the present invention;
FIG. 4 is a specific circuit structure of a single-electrode voltage generator according to an embodiment of the present invention;
fig. 5 is a specific circuit structure of a voltage acquisition circuit according to an embodiment of the present invention;
fig. 6 is a specific circuit structure of a current collecting circuit according to an embodiment of the present invention;
FIG. 7 is a block diagram of another specific example of a multi-electrode voltage generator according to an embodiment of the present invention;
fig. 8 is a specific circuit structure of the short-circuit protection circuit according to the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
An embodiment of the present invention provides a multi-electrode voltage generator, which is applied to a situation where multiple devices are controlled by using multiple electrode voltages, as shown in fig. 1, and includes: a plurality of power supplies 1, a control device 2, and a plurality of single-electrode voltage generating devices 3.
As shown in fig. 1, each single-electrode voltage generator 3 of the embodiment of the present invention has a first input terminal connected to the positive electrode of a power supply 1, a second input terminal connected to the negative electrode of the power supply, and a third input terminal connected to the control device 2, and is configured to output a voltage having a positive electrode and a negative electrode according to a driving signal sent by the control device 2, and perform double isolation between the voltage having a positive electrode and a negative electrode and the driving signal.
As shown in the figure, the control device 2 according to the embodiment of the present invention is connected to each of the single-electrode voltage generating devices 3, each of the single-electrode voltage generating devices 3 is connected to the positive electrode and the negative electrode of one of the power sources 1, all of the power sources 1 may be connected in series, for each of the single-electrode voltage generating devices 3, the control device 2 transmits a driving signal, and the output terminal for controlling the single-electrode voltage is not connected to the positive electrode and the negative electrode of the power source 1 at the same time, so as to output a voltage having the positive electrode and the negative electrode, and further, a double circuit is provided inside the single-electrode voltage generating device 3, so that the.
In the multi-electrode voltage generator provided by the embodiment of the invention, the control device controls the power supply to output the voltages with the positive electrode and the negative electrode by controlling the connection state of one single-electrode voltage generating device, so that the isolation between strong current and weak current is realized, and the control device controls the connection state of a plurality of single-electrode voltage generating devices to output the voltages with the positive electrode and the negative electrode, so that the multi-electrode voltage is generated.
In a specific embodiment, as shown in fig. 2, the single-electrode voltage generating device 3 includes: a positive electrode voltage generating circuit 31, a negative electrode voltage generating circuit 32, and an electrode voltage output terminal 33.
As shown in fig. 2, a first input terminal of the positive electrode voltage generating circuit 31 according to the embodiment of the present invention is connected to a positive electrode of a power supply 1, a second input terminal thereof is connected to the control device 2, and an output terminal thereof is connected to the electrode voltage output terminal 33, for outputting a positive electrode power supply voltage according to a first driving signal sent by the control device 2, and performing double isolation between the positive electrode power supply voltage and the first driving signal.
As shown in fig. 2, the negative electrode voltage generating circuit 32 according to the embodiment of the present invention has a first input terminal connected to the negative electrode of the power supply 1, a second input terminal connected to the control device 2, and an output terminal connected to the electrode voltage output terminal 33, and is configured to output the negative electrode power supply voltage according to the second driving signal sent by the control device 2, and perform double isolation between the negative electrode power supply voltage and the first driving signal.
The positive electrode voltage generating circuit 31 of the embodiment of the present invention is in a conducting state or a disconnecting state based on the first driving signal, and when the positive electrode voltage generating circuit is in the conducting state, the electrode voltage output end 33 is connected with the positive electrode of the power supply 1; the negative electrode voltage generating circuit 32 is in an on state or an off state based on the second drive signal, and when it is in the on state, the electrode voltage output terminal 33 is connected to the negative electrode of the power supply 1.
The control device 2 controls the operating states of the positive electrode voltage generating circuit 31 and the negative electrode voltage generating circuit, and the electrode voltage output terminal 33 is connected to the positive electrode of the power supply 1 or to the negative electrode of the power supply 1 to obtain a voltage having a positive electrode and a negative electrode, and the positive electrode voltage generating circuit 31 and the negative electrode voltage generating circuit are alternately turned on.
In one embodiment, as shown in fig. 3, the positive electrode voltage generating circuit 31 and the negative electrode voltage generating circuit 32 each include: a first isolation circuit 311 and a second isolation circuit 312.
As shown in fig. 3, an input terminal of the first isolation circuit 311 according to the embodiment of the present invention is connected to the control device 2, and an output terminal thereof is connected to a first input terminal of the second isolation circuit 312, and is configured to be in an on state or an off state according to the first driving signal or the second driving signal;
as shown in fig. 3, a second input terminal of the second isolation circuit 312 according to the embodiment of the present invention is connected to a positive electrode or a negative electrode of a power supply 1, and an output terminal thereof is connected to the electrode voltage output terminal 33, so that when the first isolation circuit 311 is in a conducting state, the second isolation circuit 312 connects the positive electrode or the negative electrode of the power supply 1 to the electrode voltage output terminal 33, and the electrode voltage output terminal 33 outputs a positive electrode power supply voltage or a negative electrode power supply voltage.
In the embodiment of the present invention, the first isolation circuit 311 of the positive electrode voltage generating circuit 31 is in an on state or an off state based on the first driving signal, and when it is in the on state, the second isolation circuit 312 connected to it is in the on state, so that the electrode voltage output terminal 33 is connected to the positive electrode of the power supply 1; the first isolation circuit 311 of the negative electrode voltage generation circuit 32 is in an on state or an off state based on the second drive signal, and when it is in the on state, the second isolation circuit 312 connected thereto is in the on state, so that the electrode voltage output terminal 33 is connected to the negative electrode of the power supply 1.
In one embodiment, as shown in fig. 4, the first isolation circuit 311 includes: first drive circuit 3111 and opto-isolator circuit 3112, wherein, first drive circuit 3111's input is connected with controlling means 2, and its output is connected with opto-isolator circuit 3112's input, and opto-isolator circuit 3112's output is connected with the first input of second isolator circuit 312 for according to first drive signal or second drive signal, control switching on or the shutoff of opto-isolator circuit 3112.
In the embodiment of the present invention, the first isolation circuit 311 of the positive electrode voltage generating circuit 31 is in an on or off state based on the first driving signal, and when it is in the on state, the rear opto-isolator circuit 3112 is turned on, so that the second isolation circuit 312 is turned on; the first isolation circuit 311 of the negative electrode voltage generation circuit 32 is in an on or off state based on the second driving signal, and when it is in the on state, the rear opto-isolator circuit 3112 is turned on, so that the second isolation circuit 312 is turned on;
as shown in fig. 4, the first driver circuit 3111 of the embodiment of the invention includes: a first switch tube Q1, a first driving power VCC, and a first gate circuit 31111, wherein a first end of the first gate circuit 31111 is connected to an output end of the control device 2, a second end thereof is connected to a control end of the first switch tube Q1, and a third end thereof is grounded; a first end of the first switching tube Q1 is connected with the positive electrode of the first driving power supply VCC through a first pull-up resistor R1, a second end of the first switching tube Q1 is connected with a first input end of the opto-coupler isolation circuit 3112, and a second input end of the opto-coupler isolation circuit 3112 is grounded; the negative electrode of the first driving power source VCC is grounded.
As shown in fig. 4, the second isolation circuit 312 of the embodiment of the present invention includes: the second switch tube Q2, the second gate circuit 3121, the second driving power source VCC _ S and the high-voltage relay 3122, wherein, the first end of the second gate circuit 3121 is connected with the first output end of the opto-isolator circuit 3112, the second end is grounded, and the third end is connected with the control end of the second switch tube Q2; a first end of the second switching tube Q2 is connected with the positive electrode of the second driving power supply VCC _ S, and is connected with a second output end of the opto-isolator circuit 3112 through a second pull-up resistor R4, and a second end of the second switching tube Q2 is connected with a first end of the high-voltage relay 3122; the second end of the high-voltage relay 3122 is connected to the negative electrode of the second driving power source VCC _ S, the third end is connected to the positive electrode or negative electrode of the power source 1, and the fourth end is suspended.
In the embodiment of the invention, when the optical coupling isolation circuit 3112 is switched on, the second gate circuit 3121 controls the second switching tube Q2 to be switched on, the high-voltage relay 3122 is powered, the electrode voltage output end 33 is connected with the positive electrode or the negative electrode of the power supply 1 through the third end of the high-voltage relay 3122, and the electrode voltage output end 33 outputs the positive electrode power supply voltage or the negative electrode power supply voltage; when the optical coupling isolation circuit 3112 is disconnected, the second gate circuit 3121 controls the disconnection of the second switching tube Q2, the high-voltage relay 3122 loses power, the electrode voltage output end 33 is connected with the fourth end of the high-voltage relay 3122, and the electrode voltage output end 33 is disconnected with the power supply 1.
In a specific embodiment, the multi-electrode voltage generator further includes:
a voltage collecting circuit, a first input end of which is connected with the output end of the positive electrode voltage generating circuit 31 in any one single electrode voltage generating device 3, and a second input end of which is connected with the output end of the negative electrode voltage generating circuit 32 in the single electrode voltage generating device, and is used for collecting the positive electrode power supply voltage and the negative electrode power supply voltage;
a current collecting circuit, a first input end of which is connected with the output end of the positive electrode voltage generating circuit 31 in any one of the single electrode voltage generating devices 3, and a second input end of which is connected with the output end of the negative electrode voltage generating circuit 32 in the single electrode voltage generating device, and is used for collecting the current output by the positive electrode voltage generating circuit 31 and the negative electrode voltage generating circuit 32;
the control device 2 performs feedback regulation of the output voltages of all the power sources 1 based on the positive electrode power supply voltage, the negative electrode power supply voltage, and the currents output from the positive electrode voltage generating circuit 31 and the negative electrode voltage generating circuit 32.
In the embodiment of the present invention, since all the power supplies may be connected in series, only one single-electrode voltage generator 3 may be voltage and current collected by using one voltage collecting circuit and one current collecting circuit, and the control device 2 may implement feedback adjustment of the voltages of all the power supplies 1 based on the voltage and current of the single-electrode voltage generator 3.
In one embodiment, as shown in fig. 5, the voltage acquisition circuit includes: a series resistance acquisition circuit 411 (composed of resistors R7 to R12 in fig. 5), a first differential amplification circuit 412, a first addition circuit 413, and a first isolated high-speed signal acquisition circuit 414.
As shown in fig. 5, the series resistance collecting circuit 411 according to the embodiment of the present invention includes two input terminals (Vo + and Vo-) and two output terminals (Vo _ S1+ and Vo _ S1-), wherein each input terminal is connected to an output terminal of the positive electrode voltage generating circuit 31 or an output terminal of the negative electrode voltage generating circuit 32, and the series resistance collecting circuit 411 is configured to divide a voltage output by the output terminal of the positive electrode voltage generating circuit 31 or the voltage output by the negative electrode voltage generating circuit 32 to obtain a first voltage signal; two input ends of the first differential amplifying circuit 412 are correspondingly connected with two input ends of the series resistance collecting circuit 411, and the first differential amplifying circuit 412 is used for amplifying a first voltage signal; an input end of the first adding circuit 413 is connected to an output end of the first differential amplifying circuit 412, and is configured to convert a negative voltage signal in the amplified first voltage signal into a first positive voltage signal and keep the positive voltage signal in the first voltage signal constant as a positive voltage signal; the input end of the first isolation high-speed signal acquisition circuit 414 is connected to the input end of the first adding circuit 413, and is configured to isolate the first voltage signal output by the first adding circuit 413, so as to obtain a first high-voltage signal.
As shown in fig. 6, the current collecting circuit according to the embodiment of the present invention includes: the parallel resistor acquisition circuit 421, the second differential amplifier circuit 422, the second adder circuit 423 and the second isolation high-speed signal acquisition circuit 424.
As shown in fig. 6, the parallel resistance collecting circuit 421 according to the embodiment of the present invention includes two input terminals (P1 and P2) and two output terminals (Io + and Io-), wherein each input terminal is connected to an output terminal of the positive electrode voltage generating circuit 31 or an output terminal of the negative electrode voltage generating circuit 32, and the parallel resistance collecting circuit 421 is configured to convert a corresponding electrode current output by the output terminal of the positive electrode voltage generating circuit 31 or the negative electrode voltage generating circuit 32 into a second voltage signal; two input ends of the second differential amplifying circuit 422 are correspondingly connected with two input ends of the parallel resistance collecting circuit 421, and the second differential amplifying circuit 422 is used for amplifying a second voltage signal; the input end of the second adding circuit 423 is connected to the output end of the second differential amplifying circuit 422, and is configured to convert the negative voltage signal in the amplified second voltage signal into a second positive voltage signal, and maintain the positive voltage signal in the second voltage signal as a positive voltage signal; the input end of the second isolation high-speed signal acquisition circuit 424 is connected to the input end of the second adder circuit 423, and is configured to isolate the second voltage signal output by the second adder circuit 423 to obtain a second high-voltage signal.
According to the embodiment of the invention, two high-voltage relays (which are high-voltage relays in the same single-electrode voltage generating device) are connected to the same voltage acquisition circuit and the same current acquisition circuit, so that the design difficulty of the whole set of system is reduced, the whole set of system does not need to consider the polarity problem, the system can be realized only by switching the high-voltage relays, and the system has a short-circuit prevention function, is comprehensive in consideration, simple in design and high in utilization rate.
As shown in fig. 5 and 6, the embodiment of the present invention is based on a high-speed linear optocoupler (optocoupler isolation chips U3 and U6), has an output clamping function, prevents an abnormal signal from being collected, so that the voltage sent to a control system is too large, can convert a bipolar voltage into a unipolar electric signal through a circuit, and does not need to consider the polarity problem. Compared with the traditional acquisition circuit, the acquisition circuit has the following advantages: 1) the high-speed isolation optocoupler is adopted to realize electrical isolation, so that interference can be prevented, and high-speed change signals can be acquired; 2) the polarity conversion function is provided, signals with different polarities can be converted into signals with the same polarity, and collection is facilitated; 3) the applicability is strong, and the acquisition function can be realized by being suitable for the same circuit only by changing the acquisition mode and the acquisition proportion of the signal source.
It should be noted that the single-electrode voltage generating circuit according to the embodiment of the present invention is integrated in one module, so as to implement a modular multi-electrode voltage generator, and the number of electrodes of the multi-electrode voltage can be controlled by setting the number of the control devices 2 according to actual needs, which is convenient for expansion.
In a specific embodiment, as shown in fig. 7, the multi-electrode voltage generator further includes:
and a plurality of short-circuit protection circuits 5, each short-circuit protection circuit 5 having an input terminal connected to the output terminal of the control device 2 and an output terminal connected to an input terminal of one single-electrode voltage generating device 3, for generating an enable signal according to the first drive signal and the second drive signal, and the first isolation circuit 311 being in an on state or an off state according to the first drive signal and the enable signal or according to the second drive signal and the enable signal.
As shown in fig. 8, each short-circuit protection circuit includes: the control device comprises an AND gate logic chip 51, a NOT gate logic chip 52 and a diode D1, wherein the input end of the AND gate logic chip 51 is connected with the output end of the control device 2, the output end of the AND gate logic chip 51 is connected with the input end of the NOT gate logic chip 52, the output end of the NOT gate logic chip 52 is connected with the cathode of a diode D1, and the anode of a diode D1 is connected with the input end of a single-electrode voltage generating device 3.
In the multi-electrode voltage generator provided by the embodiment of the invention, the single-electrode voltage generating device is composed of the first isolating circuit and the second isolating circuit, and the control circuit controls the on-off state of the first isolating circuit so as to control the on-off state of the second isolating circuit, thereby realizing the output of the voltage with the positive electrode and the negative electrode and the double isolation between strong and weak current.
According to the multi-electrode voltage generator provided by the embodiment of the invention, the short-circuit protection circuit generates the enabling signal according to the first driving signal and the second driving signal, the enabling signal is combined with the first driving signal or the second driving signal to control the on-off state of the first isolation circuit, so that a plurality of power supplies are prevented from outputting voltages, meanwhile, the short-circuit protection can be realized only by using a NAND gate, and the design cost and the design difficulty are reduced; the power supply of the power supply circuit is connected with the acquisition circuit through the high-voltage relay, so that double isolation between strong current and weak current is realized.
According to the multi-electrode voltage generator provided by the embodiment of the invention, the control device carries out feedback regulation on each power supply according to the voltage and the current acquired by the voltage acquisition circuit and the current acquisition circuit, and meanwhile, the voltage acquisition circuit and the current acquisition circuit use the high-speed linear optocoupler to build the acquisition circuit, so that the signal acquisition rate and the anti-interference capability are improved, the signal acquisition range is expanded, and the system function requirement is indirectly improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (11)
1. A multiple-electrode voltage generator, comprising: a plurality of power supplies, a control device, a plurality of single-electrode voltage generating devices, wherein,
the first input end of each single-electrode voltage generating device is connected with the anode of a power supply, the second input end of each single-electrode voltage generating device is connected with the cathode of the power supply, the third input end of each single-electrode voltage generating device is connected with the control device, and the single-electrode voltage generating devices are used for outputting voltages with the anode and the cathode according to driving signals sent by the control device and carrying out double isolation between the voltages with the anode and the cathode and the driving signals.
2. The multiple-electrode voltage generator according to claim 1, wherein the single-electrode voltage generating means comprises: a positive electrode voltage generating circuit, a negative electrode voltage generating circuit and an electrode voltage output terminal, wherein,
the first input end of the positive electrode voltage generating circuit is connected with the positive electrode of a power supply, the second input end of the positive electrode voltage generating circuit is connected with the control device, and the output end of the positive electrode voltage generating circuit is connected with the electrode voltage output end and used for outputting positive electrode power supply voltage according to a first driving signal sent by the control device and carrying out double isolation between the positive electrode power supply voltage and the first driving signal;
the first input end of the negative electrode voltage generating circuit is connected with the negative electrode of a power supply, the second input end of the negative electrode voltage generating circuit is connected with the control device, and the output end of the negative electrode voltage generating circuit is connected with the electrode voltage output end and used for outputting negative electrode power supply voltage according to a second driving signal sent by the control device and carrying out double isolation between the negative electrode power supply voltage and the first driving signal.
3. The multi-electrode voltage generator according to claim 2, wherein the positive electrode voltage generating circuit and the negative electrode voltage generating circuit each comprise: a first isolation circuit, a second isolation circuit, wherein,
the input end of the first isolation circuit is connected with the control device, and the output end of the first isolation circuit is connected with the first input end of the second isolation circuit and used for being in a conducting state or a switching-off state according to the first driving signal or the second driving signal;
the second input end of the second isolating circuit is connected with the positive electrode or the negative electrode of a power supply, the output end of the second isolating circuit is connected with the electrode voltage output end, and when the first isolating circuit is in a conducting state, the second isolating circuit is used for connecting the positive electrode or the negative electrode of the power supply with the electrode voltage output end, and the electrode voltage output end outputs positive electrode power supply voltage or negative electrode power supply voltage.
4. The multi-electrode voltage generator of claim 3, wherein the first isolation circuit comprises: a first drive circuit and an optical coupling isolation circuit, wherein,
the input end of the first driving circuit is connected with the control device, the output end of the first driving circuit is connected with the input end of the optical coupling isolation circuit, and the output end of the optical coupling isolation circuit is connected with the first input end of the second isolation circuit and used for controlling the on or off of the optical coupling isolation circuit according to the first driving signal or the second driving signal.
5. The multi-electrode voltage generator according to claim 4, wherein the first drive circuit comprises: a first switch tube, a first driving power supply, a first gate pole circuit,
the first end of the first gate pole circuit is connected with the output end of the control device, the second end of the first gate pole circuit is connected with the control end of the first switching tube, and the third end of the first gate pole circuit is grounded;
the first end of the first switch tube is connected with the anode of a first driving power supply through a first pull-up resistor, the second end of the first switch tube is connected with the first input end of the optical coupling isolation circuit, and the second input end of the optical coupling isolation circuit is grounded;
the negative electrode of the first driving power supply is grounded.
6. The multi-electrode voltage generator of claim 5, wherein the second isolation circuit comprises: a second switch tube, a second gate pole circuit, a second driving power supply and a high-voltage relay, wherein,
the first end of the second gate electrode circuit is connected with the first output end of the optical coupling isolation circuit, the second end of the second gate electrode circuit is grounded, and the third end of the second gate electrode circuit is connected with the control end of the second switch tube;
the first end of the second switching tube is connected with the positive electrode of the second driving power supply, and is connected with the second output end of the optical coupling isolation circuit through a second pull-up resistor, and the second end of the second switching tube is connected with the first end of the high-voltage relay;
the second end of the high-voltage relay is connected with the negative electrode of the second driving power supply, the third end of the high-voltage relay is connected with the positive electrode or the negative electrode of the power supply, and the fourth end of the high-voltage relay is suspended;
when the optical coupling isolation circuit is switched on, the second gate circuit controls the second switch tube to be switched on, the high-voltage relay is electrified, the electrode voltage output end is connected with the anode or the cathode of a power supply through the third end of the high-voltage relay, and the electrode voltage output end outputs positive electrode power supply voltage or negative electrode power supply voltage;
when the optical coupling isolation circuit is disconnected, the second gate circuit controls the second switch tube to be disconnected, the high-voltage relay is powered off, the electrode voltage output end is connected with the fourth end of the high-voltage relay, and the electrode voltage output end is disconnected with the power supply.
7. The multiple-electrode voltage generator according to claim 1, further comprising:
the first input end of the voltage acquisition circuit is connected with the output end of a positive electrode voltage generation circuit in any one single-electrode voltage generation device, and the second input end of the voltage acquisition circuit is connected with the output end of a negative electrode voltage generation circuit in the single-electrode voltage generation device and is used for acquiring a positive electrode power supply voltage and a negative electrode power supply voltage;
the first input end of the current collecting circuit is connected with the output end of the positive electrode voltage generating circuit in any one single-electrode voltage generating device, and the second input end of the current collecting circuit is connected with the output end of the negative electrode voltage generating circuit in the single-electrode voltage generating device and is used for collecting currents output by the positive electrode voltage generating circuit and the negative electrode voltage generating circuit;
and the control device performs feedback regulation on the output voltage of all the power supplies according to the positive electrode power supply voltage, the negative electrode power supply voltage, and the currents output by the positive electrode voltage generating circuit and the negative electrode voltage generating circuit.
8. The multi-electrode voltage generator of claim 7, wherein the voltage acquisition circuit comprises: a series resistance acquisition circuit, a first differential amplification circuit, a first addition circuit and a first isolation high-speed signal acquisition circuit,
the series resistance acquisition circuit comprises two input ends and two output ends, each input end is connected with the output end of the positive electrode voltage generation circuit or the output end of the negative electrode voltage generation circuit, and the series resistance acquisition circuit is used for dividing the voltage output by the output end of the positive electrode voltage generation circuit or the negative electrode voltage generation circuit to obtain a first voltage signal;
two input ends of the first differential amplification circuit are correspondingly connected with two input ends of the series resistance acquisition circuit, and the first differential amplification circuit is used for amplifying a first voltage signal;
the input end of the first adding circuit is connected with the output end of the first differential amplifying circuit and is used for converting a negative voltage signal in the amplified first voltage signal into a first positive voltage signal and keeping the positive voltage signal in the first voltage signal to be a positive voltage signal constantly;
the input end of the first isolation high-speed signal acquisition circuit is connected with the input end of the first addition circuit and used for isolating the first voltage signal output by the first addition circuit to obtain a first high-voltage signal.
9. The multi-electrode voltage generator of claim 7, wherein the current collection circuit comprises: a parallel resistance acquisition circuit, a second differential amplification circuit, a second addition circuit and a second isolation high-speed signal acquisition circuit,
the parallel resistance acquisition circuit comprises two input ends and two output ends, each input end is connected with the output end of the positive electrode voltage generation circuit or the output end of the negative electrode voltage generation circuit, and the parallel resistance acquisition circuit is used for converting the corresponding electrode current output by the output end of the positive electrode voltage generation circuit or the negative electrode voltage generation circuit into a second voltage signal;
two input ends of the second differential amplification circuit are correspondingly connected with two input ends of the parallel resistance acquisition circuit, and the second differential amplification circuit is used for amplifying a second voltage signal;
the input end of the second adding circuit is connected with the output end of the second differential amplifying circuit and is used for converting a negative voltage signal in the amplified second voltage signal into a second positive voltage signal and keeping the positive voltage signal in the second voltage signal to be a positive voltage signal constantly;
the input end of the second isolation high-speed signal acquisition circuit is connected with the input end of the second addition circuit and used for isolating the second voltage signal output by the second addition circuit to obtain a second high-voltage signal.
10. The multiple-electrode voltage generator according to claim 3, further comprising:
and the input end of each short-circuit protection circuit is connected with the output end of the control device, the output end of each short-circuit protection circuit is connected with the input end of one single-electrode voltage generating device and used for generating an enabling signal according to the first driving signal and the second driving signal, and the first isolation circuit is in an on state or an off state according to the first driving signal and the enabling signal or according to the second driving signal and the enabling signal.
11. The multiple-electrode voltage generator according to claim 10, wherein each of the short-circuit protection circuits comprises: and gate logic chip, not gate logic chip, diode, wherein,
the input end of the AND gate logic chip is connected with the output end of the control device, the output end of the AND gate logic chip is connected with the input end of the NOT gate logic chip, the output end of the NOT gate logic chip is connected with the cathode of the diode, and the anode of the diode is connected with the input end of a single electrode voltage generating device.
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