CN113359923A - Digital controlled DC voltage-stabilized source - Google Patents
Digital controlled DC voltage-stabilized source Download PDFInfo
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- CN113359923A CN113359923A CN202110698759.1A CN202110698759A CN113359923A CN 113359923 A CN113359923 A CN 113359923A CN 202110698759 A CN202110698759 A CN 202110698759A CN 113359923 A CN113359923 A CN 113359923A
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- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
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Abstract
The invention provides a numerical control direct current stabilized power supply, comprising: the device comprises a transformation rectification module, a control module and a D/A conversion module, wherein the transformation rectification module is used for transforming, rectifying and filtering the input voltage, and is connected with an alternating current output end or a direct current input power supply; the control module includes: the voltage control module is connected with the voltage transformation rectifying module and used for increasing and/or reducing voltage to meet the power supply requirement of the chip; the processor control module is connected with the voltage control module and is used for controlling interaction of the power supply and output of voltage; the D/A conversion module is connected with the processor control module and is used for converting the received signals of the processor control module into analog voltage and outputting the analog voltage. The invention realizes the comprehensive digitization of the power supply, and can be connected with direct current power supply and alternating current power supply; the control precision is high, and voltage output with 8-bit precision can be realized; and a double D/A operational amplifier structure is adopted to realize large-amplitude voltage adjustment.
Description
Technical Field
The invention relates to the technical field of power supply design, in particular to a numerical control direct current stabilized voltage power supply.
Background
The power supply industry has become a very important basic energy demand and industry at present, and is widely applied to various industries in the world. The power supply is the basis for the entire electronic and control system. With the increasing requirements for the precision of electronic equipment, the requirements for the performance of power supplies are also increasing. In all electronic circuits and electronic devices, stable power supplies are required, which have different requirements for the devices, as well as different requirements for voltage, current, stability of the power supply and ripple. The direct current stabilized voltage supply is widely applied to the fields of engineering science and technology, scientific research and exploration departments and metering detection as a branch field of power supply technology, and has considerable research value and practical value.
The existing direct current stabilized power supply is mostly realized by directly using an analog circuit or by mixing an analog-digital circuit, a digital circuit is added on a display part, namely, voltage regulation is carried out by adopting links such as transformation coil transformation, rectifier diode rectification, capacitance voltage stabilization, filtering, voltage regulation and the like, and the direct current stabilized power supply is formed by circuits such as current limiting, EMC electromagnetic compatibility and the like in an auxiliary manner, wherein similar realization schemes are adopted by more than 90% of low-end stabilized power supplies in the market at present. More and more products are developed towards numerical control at present, because the numerical control mode can provide more flexible and accurate control. At present, a voltage control mode is generally adopted for a numerical control direct current source, and display errors exist between display voltage and actual output voltage due to different control voltage generation modes, V-I conversion methods and current control modes.
Disclosure of Invention
Aiming at the defects or the improvement requirement of the prior art, the invention provides a numerical control direct current stabilized power supply.
Numerical control direct current constant voltage power supply includes: vary voltage rectification module, control module, DA conversion module, wherein:
the voltage transformation rectifying module is used for transforming, rectifying and filtering the input voltage, is connected with the alternating current output end or the direct current input power supply and can receive alternating current and direct current dual-mode power supply.
The control module includes: the voltage control module is connected with the voltage transformation rectifying module and is used for increasing and/or reducing voltage to meet the power supply requirement of the chip; and the processor control module is connected with the voltage control module and is used for controlling interaction of the numerical control direct current stabilized voltage supply and voltage output.
The D/A conversion module is connected with the processor control module and is used for converting the received signals of the processor control module into analog voltage and outputting the analog voltage.
Further, the voltage transformation rectifying module comprises a transformer, a full-wave rectifying bridge, a first filter capacitor, a second filter capacitor and a TVS diode; the input end of the transformer is connected with the alternating current output end, the output end of the transformer is connected with the alternating current voltage input end of the full-wave rectifier bridge, the TVS diode is connected in parallel with the voltage input end of the direct current input end, and the first filter capacitor and the second filter capacitor are connected in parallel with the unidirectional pulsating voltage output end of the full-wave rectifier bridge.
When the voltage transformation rectifying module is connected with alternating current voltage, the alternating current voltage is transformed through the transformer and then enters the full-wave rectifying bridge to be rectified into pulsating direct current voltage; when the transformation rectifying module is connected with the direct-current voltage, the transformer does not work, and the full-wave rectifying bridge is in a working state to receive the direct-current voltage.
Further, the voltage control module comprises a voltage boosting circuit and a voltage reducing circuit; the boosting circuit comprises a boosting chip and a boosting chip peripheral circuit, and the boosting chip peripheral circuit boost the voltage output by the voltage transformation rectifying module to 73-77V.
The voltage reduction circuit comprises a first voltage reduction chip, a second voltage reduction chip, a third voltage reduction chip, a fourth voltage reduction chip, a first voltage reduction chip peripheral circuit, a second voltage reduction chip peripheral circuit, a third voltage reduction chip peripheral circuit and a fourth voltage reduction chip peripheral circuit, wherein the voltage output by the voltage transformation rectification module is reduced to 4.9-5.1V through the fourth voltage reduction chip and the third voltage reduction chip, and is reduced to 3.29-3.31V through the second voltage reduction chip and the first voltage reduction chip.
The processor control module comprises a micro control chip and a micro control chip peripheral circuit, and is connected with the voltage reduction circuit.
Furthermore, the D/a conversion module includes a first digital-to-analog conversion chip, a second digital-to-analog conversion chip, a first in-phase proportional operational amplifier, a second in-phase proportional operational amplifier, a first diode, a second diode, an output controller, a terminal, a first digital-to-analog conversion chip peripheral circuit, a second digital-to-analog conversion chip peripheral circuit, a first in-phase proportional operational amplifier peripheral circuit, and a second in-phase proportional operational amplifier peripheral circuit.
The processor control module is connected with the input ends of the first digital-to-analog conversion chip and the second digital-to-analog conversion chip, the output ends of the first digital-to-analog conversion chip and the second digital-to-analog conversion chip are respectively connected with the input ends of the first same-phase proportional operational amplifier and the second same-phase proportional operational amplifier, the output ends of the first same-phase proportional operational amplifier and the second same-phase proportional operational amplifier are respectively connected with the output controller, the output controller controls whether a numerical control direct current stabilized power supply outputs voltage, and the binding post is connected with the output controller and used as an output port of the numerical control direct current stabilized power supply.
The first diode and the second diode are respectively connected with the output end of the second in-phase proportional operational amplifier and used for protecting the output of the second in-phase proportional operational amplifier and preventing reverse breakdown caused by static electricity.
Further, numerical control direct current constant voltage power supply still include with the overcurrent and EMC protection module that treater control module is connected, overcurrent and EMC protection module includes current detection chip and current detection chip peripheral circuit, through the current detection chip detects numerical control direct current constant voltage power supply's output current signal and send to treater control module, treater control module control the break-make of numerical control direct current constant voltage power supply sends early warning signal when the disconnection.
Further, the overcurrent and EMC protection module further includes a first clamping diode and a second clamping diode, and the first clamping diode and the second clamping diode are connected to the output terminal of the current detection chip for output protection and preventing reverse breakdown caused by static electricity.
Furthermore, the numerical control direct current stabilized power supply also comprises an A/D sampling module connected with the processor control module, the A/D sampling module collects output voltage signals of the numerical control direct current stabilized power supply and sends the output voltage signals to the processor control module, and the processor control module controls the magnitude of the output voltage by comparing the output voltage signals with a preset value to form a voltage closed-loop control system.
Further, the A/D sampling module comprises a first operational amplifier, a second operational amplifier, a first operational amplifier peripheral circuit and a second operational amplifier peripheral circuit.
The input ends of the first operational amplifier and the second operational amplifier are respectively connected with the output ends of the second in-phase proportional operational amplifier and the first same-phase proportional operational amplifier, and the output ends of the first operational amplifier and the second operational amplifier are respectively connected with the processor control module and used for controlling the output voltage to form a voltage closed-loop control system.
Furthermore, the numerical control direct current stabilized voltage supply also comprises an interaction module for realizing the functions of man-machine interaction, voltage output control, external instruction receiving and output on-off control.
Further, the interaction module comprises a local interaction module and/or a remote interaction module.
The local interaction module comprises a driving chip, a nixie tube, a voltage adjusting knob, an output enabling button, a driving chip peripheral circuit and a nixie tube peripheral circuit.
The micro control chip is connected with the driving chip and used for driving the nixie tube to display voltage or current values, and the micro control chip is respectively connected with the voltage adjusting knob and the output enabling button and used for controlling voltage output.
The remote interaction module comprises a WiFi module or a Bluetooth module and is used for carrying out wireless communication with the micro control chip.
The numerical control direct current stabilized voltage supply provided by the invention realizes comprehensive digitization of the power supply through the combination of software and hardware, can modify current and voltage parameters through the software, and can realize the control of voltage output through external hardware. The direct current power supply can be accessed, and the alternating current power supply can also be accessed; the control precision is high, and voltage output with 8-bit precision can be realized; and a double D/A operational amplifier structure is adopted to realize large-amplitude voltage adjustment.
Drawings
FIG. 1 is a block diagram of the schematic architecture of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall circuit of the digital controlled DC voltage regulator according to the embodiment of the invention;
FIG. 3 is a circuit schematic of a transformer rectifier module according to an embodiment of the present invention;
FIG. 4 is a circuit schematic of a voltage control module of the control module of an embodiment of the present invention;
FIG. 5 is a circuit schematic of a processor control module of the control module of an embodiment of the present invention;
FIG. 6 is a circuit schematic of a D/A conversion module of an embodiment of the invention;
FIG. 7 is a circuit schematic diagram of an overcurrent and EMC protection module according to an embodiment of the invention;
FIG. 8 is a circuit schematic of an A/D sampling module of an embodiment of the present invention;
FIG. 9 is a circuit schematic of a local interaction module of an embodiment of the present invention;
FIG. 10 is a circuit schematic of a Bluetooth module of the remote interaction module of an embodiment of the present invention;
fig. 11 is a flowchart of the program of the digitally controlled dc voltage regulator according to the embodiment of the present invention.
Wherein the reference numerals are as follows:
a transformer M, a diode D1 of a full-wave rectifier bridge B, TVS, a first filter capacitor C1, a first filter capacitor C2, a TVS diode D1, a first buck chip U7, a second buck chip U4, a third buck chip U3, a fourth buck chip U2, a first boost chip U5, a micro-control chip U5, a first digital-to-analog conversion chip U5, a second digital-to-analog conversion chip U5, a first comparison operational amplifier U5, a second in-phase proportional operational amplifier U5, a first diode D5, a second diode D5, a first reed switch K5, a second reed switch K5, an H5, a current detection chip U5, a first clamp diode D5, a second clamp diode D5, a first operational amplifier U9.1, a second operational amplifier U9.2, a first resistor R5, a second resistor R5, a third resistor U5, a clamp R5, a drive button U5, a clamp switch 5, a drive button 5, a digital control button 36j 5, and a digital control button, Bluetooth module U6.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. 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.
The embodiment of the invention provides a numerical control direct current stabilized power supply, fig. 1 shows a schematic structure block diagram of the embodiment of the invention, and fig. 2 shows an overall circuit schematic diagram of the numerical control direct current stabilized power supply of the embodiment of the invention.
As shown in fig. 1, the digital controlled dc regulated power supply according to the embodiment of the present invention includes: vary voltage rectification module, control module, DA conversion module, wherein: the voltage transformation rectifying module is used for transforming, rectifying and filtering the input voltage, and is connected with an alternating current output end or a direct current input power supply; the control module includes: the voltage control module is connected with the voltage transformation rectifying module and used for increasing and/or reducing voltage to meet the power supply requirement of the chip; the processor control module is connected with the voltage control module and is used for controlling interaction of the numerical control direct current stabilized power supply and output of voltage; the D/A conversion module is connected with the processor control module and is used for converting the received signals of the processor control module into analog voltage and outputting the analog voltage.
Fig. 3 shows a schematic circuit diagram of a transformation rectifying module according to an embodiment of the present invention, where the transformation rectifying module can be connected with both 220V ac voltage and 5-60V dc voltage of ac power. The ends 1 and 5 of the transformer M are connected with an alternating current output end, the ends 9 and 7 of the transformer M are connected with an alternating voltage input end of the full-wave rectifier bridge B, a TVS diode D1 for removing interference and transient pulse is connected in parallel with a voltage input end of a direct current input end, the minimum breakdown voltage VBR of the TVS is more than 100V, and the first filter capacitor C1 and the first filter capacitor C2 are connected in parallel with a one-way pulsating voltage output end of the full-wave rectifier bridge B. When the transformer rectifier module is connected with 220V alternating voltage input, the 220V alternating voltage is converted into 110V alternating voltage through a coil of a transformer M, then enters a full-wave rectifier bridge B to be rectified into pulsating direct voltage with the peak value of about 91V, and is converted into smoother voltage of about 65V after smoothing and noise filtering through a first filter capacitor C1 and a first filter capacitor C2. When 5-60V direct-current voltage is connected, the transformer M does not work, the full-wave rectifier bridge B is in a working state, and the full-wave rectifier bridge B can receive the direct-current voltage in reverse connection, namely the input of the direct-current voltage can not distinguish the positive electrode from the negative electrode. The input 5-60V direct current voltage is smoothed through the first filter capacitor C1 and the first filter capacitor C2, noise is filtered, and then the input 5-60V direct current voltage enters a subsequent circuit. The voltage transformation rectifying module can be connected with direct current power supply and alternating current power supply, but the two can not be simultaneously input. When the circuit is powered by direct current, the TVS diode D1 has the function of reverse connection prevention protection, so that the connection can be positive and negative.
Fig. 4 shows a schematic circuit diagram of a voltage control module in a control module according to an embodiment of the present invention, the voltage control module is used for supplying power to a chip in a digitally controlled dc voltage-stabilized power supply, and the voltage control module is divided into a voltage boost circuit and a voltage buck circuit. The boosting circuit comprises a first boosting chip U5 (model is MC34063) and a peripheral circuit of U5, boosts the voltage output by the transformation rectifying module to 75V, and supplies the voltage to a chip in the circuit which needs 75V voltage for power supply and uses the chip as a reference voltage. The voltage reduction circuit comprises a first voltage reduction chip U7 (model is MC34063), a second voltage reduction chip U4 (model is LM7805), a third voltage reduction chip U3 (model is AMS1117-3.3), a fourth voltage reduction chip U2 (model is AMS1117-3.3) and peripheral circuits of the chips, the voltage output by the voltage transformation rectification module is reduced to about 12V through the first voltage reduction chip U7 and is reduced to 5V through the second voltage reduction chip U4, and as shown in FIG. 2, the voltage reduction circuit is used by the chips which need 5V voltage power supply; the voltage of 5V is reduced to stable 3.3V through the third voltage reduction chip U3 and the fourth voltage reduction chip U2, and the voltage is supplied to a chip in the circuit, which needs 3.3V voltage for power supply, and is used as an analog reference voltage. The connected direct current input voltage is not higher than 75V, preferably 5-60V, and the connected alternating current input voltage is not higher than 250V, preferably 220-240V.
Fig. 5 shows a circuit schematic of a processor control module in a control module employing an STM32 family controller according to an embodiment of the present invention. The processor control module can also adopt microprocessors such as 51, Arduino, MSP430 and the like, and the invention does not limit the specific model of the micro control chip U1. As shown in fig. 2, the circuit of the processor control module in the embodiment includes a micro control chip U1 (model is STM32F030C8T6) and a peripheral circuit of U1, and can realize functions of receiving voltage, voltage adjusted by a current knob, adjusting value of output voltage, receiving collected voltage value, displaying voltage, man-machine interaction, analyzing bluetooth and MODBUS information, and controlling output voltage, etc., fig. 2 shows splitting positions U1.1 and U1.2 of the micro control chip U1, and in fact, U1.1 and U1.2 are a micro control chip U1.
Fig. 6 shows a schematic circuit diagram of a D/a conversion module according to an embodiment of the present invention, which is configured to receive a signal from a processor control module, convert the signal into an analog voltage, and drive a load. The D/a conversion module in the embodiment includes a first digital-to-analog conversion chip U12, a second digital-to-analog conversion chip U14 (model numbers of U12 and U14 are AD5320), a first same phase proportion operational amplifier U10, a second in-phase proportion operational amplifier U8 (model numbers of U10 and U8 are OPA548), a first diode D7, a second diode D8, a first reed switch relay K1 and a second reed switch relay K2, which constitute an output controller, a terminal H1 and a peripheral circuit of the chips. The processor control module is connected with input ends of a first digital-to-analog conversion chip U12 and a second digital-to-analog conversion chip U14, output ends of the first digital-to-analog conversion chip U12 and the second digital-to-analog conversion chip U14 are respectively connected with input ends of a first same-phase proportional operational amplifier U10 and an input end of a second same-phase proportional operational amplifier U8, output ends of the first same-phase proportional operational amplifier U10 and the second same-phase proportional operational amplifier U8 are respectively connected with a first reed switch relay K1 and a second reed switch K2, and a first diode D7 and a second diode D8 are connected with the second same-phase proportional operational amplifier U8 and used for output protection and prevention of output operational amplifier breakdown caused by static electricity. Signals output by the processor control module enter a first digital-to-analog conversion chip U12 and a second digital-to-analog conversion chip U14 respectively for digital-to-analog conversion, converted analog signals enter an in-phase proportional operational amplifier with a double operational amplifier floating topology structure consisting of a first same phase proportion operational amplifier U10, a second in-phase proportional operational amplifier U8 and peripheral circuits thereof respectively, the analog signals are amplified to 0-75V, an output controller consists of a first reed switch relay K1 and a second reed switch relay K2, the amplified signals enter a first reed switch relay K1 and a second reed switch relay K2 for output control, and finally the amplified signals are output through a binding post H1; when the first reed switch relay K1 and the second reed switch relay K2 are closed, the terminal H1 is directly connected with the output ends of the first same-phase proportional operational amplifier U10 and the second same-phase proportional operational amplifier U8, when the first reed switch relay K1 and the second reed switch relay K2 are disconnected, the output of the D/A conversion circuit is disconnected, and the D/A conversion circuit has no output voltage. The voltage output by the D/A conversion circuit is the voltage difference of the output voltages of the first same-phase proportional operational amplifier U10 and the second same-phase proportional operational amplifier U8, so that the output voltage of the numerical control direct current stabilized power supply can reach positive and negative 75V theoretically, and the numerical control direct current stabilized power supply can output the voltage of positive and negative 70V considering the voltage loss of the actual situation. The first same-phase proportion operational amplifier U10 and the second same-phase proportion operational amplifier U8 are power operational amplifiers, the output current of the power operational amplifiers can reach 3A, the maximum output current of the power operational amplifiers can reach 5A, therefore, if the former-stage transformation power is enough, the latter-stage output power can reach 200W at most, the peak power can reach 400W, the power operational amplifiers have larger output power, double output of voltage can be realized, and the output voltage can reach 8-bit precision.
In a preferred embodiment of the present invention, the digitally controlled dc regulated power supply further includes an overcurrent and EMC protection module connected to the processor control module, fig. 7 shows a circuit schematic diagram of the overcurrent and EMC protection module according to the embodiment of the present invention, a current detection chip U13 (model ACS712) sends a detected current to the micro control chip U1 in the form of an analog signal, and the micro control chip U1 controls the circuit to turn on and off and send an early warning signal by comparing with a preset current value. The first clamping diode D9 and the second clamping diode D10 are connected with the current detection chip U13, and are used for output protection to prevent the breakdown of the output operational amplifier caused by static electricity. In addition, the overcurrent and EMC protection module can also adopt the modes of operational amplifier matched resistors such as high-end current detection, low-end current detection and the like for detection.
In a preferred embodiment of the present invention, the digitally controlled dc regulated power supply further includes an a/D sampling module connected to the processor control module, and fig. 8 shows a schematic circuit diagram of the a/D sampling module according to the embodiment of the present invention, where a first operational amplifier U9.1 and a second operational amplifier U9.2 are adopted to respectively collect voltages of output pins of the second in-phase proportional operational amplifier U8 and the first in-phase proportional operational amplifier U10, and the voltages are decompressed through a first resistor R58 and a second resistor R60 and then input to the micro control chip U1 for analysis. In order to eliminate errors, the 75V voltage is reduced by the third resistor R62 and then input to the micro-control chip U1 as an internal reference voltage of the micro-control chip U1. The voltage passing through the resistors R58, R60 and R62 is linearly reduced to be within the range of 0-3.3V, and the micro-control chip U1 accurately controls the output voltage by analyzing and comparing the voltage value reduced by the resistors to form a voltage closed-loop control system. The embodiment of the invention forms the voltage follower by the two operational amplifiers, and hardly requires current from the output stage when sampling, so that the voltage and the current which are output cannot be influenced.
In a preferred embodiment of the invention, the digital control direct current stabilized voltage supply further comprises an interaction module, wherein the interaction module comprises a local interaction module and/or a remote interaction module, and is used for realizing the functions of man-machine interaction, voltage output control, external instruction receiving and output on-off control.
Fig. 9 shows a schematic circuit diagram of a local interaction module according to an embodiment of the present invention, which includes a driver chip U11 (model 74HC595), a nixie tube LED1, a voltage adjusting knob H2, an output enable button J2, and peripheral circuits of the above chips. The micro-control chip U1 drives the driving chip U11, and sends a digital signal time sequence to the driving chip U11, and the corresponding voltage or current value is displayed through the nixie tube LED 1. The voltage adjusting knob H2 adopts a 10-turn 10K precision potentiometer and is connected with the micro control chip U1, and the output voltage can be accurately adjusted by rotating the voltage adjusting knob H2. The output enable button J2 is connected with the micro control chip U1 and is used for controlling whether to output voltage or not.
Fig. 10 shows a schematic diagram of a bluetooth module circuit of a remote interaction module according to an embodiment of the present invention, in which a bluetooth module U6 (model number is HC05) and peripheral circuits of the bluetooth module U6 and the module are used for wireless communication with a micro control chip U1, and a WiFi module (model number is ESP8266) is configured in the same manner, so that a human-computer interaction or a remote interaction module is controlled by using a WiFi or a serial port (RS485) to connect to a PLC, and the two modules cannot be used at the same time.
Fig. 11 shows a program flow diagram of a digitally controlled dc regulated power supply according to an embodiment of the present invention, which includes four threads, where thread 1 is used to display output voltage, read potential value of an adjusting knob and implement functions of an interaction module, and thread 2 is used to read or initialize a serial port or a bluetooth device, operate the serial port, and provide necessary protocol stack and logic operation for an external interface; thread 3 is a core thread, which performs PID algorithm adjustment by reading the output voltage value in combination with the voltage expected value given by thread 1, outputs the voltage value after D/a conversion, and thread 4 operates the output voltage value given by thread 3 and outputs it to the D/a conversion module.
According to the numerical control direct current stabilized power supply, comprehensive digitization of the power supply is achieved through the numerical control chip, current and voltage parameters can be modified through software, and voltage output control can be achieved through external hardware. The direct current power supply can be accessed, and the alternating current power supply can also be accessed; the control precision is high, and voltage output with 8-bit precision can be realized; and a double D/A operational amplifier structure is adopted to realize large-amplitude voltage adjustment.
The embodiment of the invention shows one path of numerical control direct current stabilized power supply, and in actual operation, a plurality of paths of numerical control direct current stabilized power supplies can be arranged to form a plurality of paths of precise numerical control voltage source equipment or a numerical control voltage source cabinet and the like. Each path of digital control direct current stabilized voltage supply can be independently controlled and read through RS485 or WIFI or a knob. The numerical control direct current stabilized power supply is composed of solid components and high in switching frequency. The numerical control direct current stabilized power supply can drive the highest load resistance of 1 omega within the range of plus or minus 5V, and can drive the highest load resistance of 15 omega under the condition of the maximum output voltage of plus or minus 75V. In addition, the multi-path numerical control direct current stabilized power supply can be used as signal generators with various waveforms by simple programming, and each path of signal generator can drive the resistive load, so that the capacitive load of 1 muF can be driven to the maximum under the condition of 10Mhz, and the capacitive load of 10nF can be driven to the maximum under the condition of 100 Mhz. Therefore, the combined multi-path numerical control direct current stabilized power supply can drive a function signal generator of a large load. The function signal generator and the numerical control direct current stabilized voltage supply can be integrated into one set of equipment according to the experimental needs of the engineering industry, and in the integration process, the topological structure of each path of numerical control direct current stabilized voltage supply does not need to be changed and only needs to be improved on a software level.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A kind of digital controlled direct current stabilized voltage supply, characterized by that, comprising: the device comprises a voltage transformation rectifying module, a control module and a D/A conversion module; wherein the content of the first and second substances,
the voltage transformation rectifying module is used for transforming, rectifying and filtering the input voltage, is connected with an alternating current output end or a direct current input power supply, receives alternating current and direct current and supplies power in a mode;
the control module includes: the voltage control module is connected with the voltage transformation rectifying module and is used for increasing and/or reducing voltage so as to meet the power supply requirement of the chip; the processor control module is connected with the voltage control module and is used for controlling interaction of the numerical control direct current stabilized power supply and output of voltage;
the D/A conversion module is connected with the processor control module and is used for converting the received signals of the processor control module into analog voltage and outputting the analog voltage.
2. The digitally controlled regulated direct current power supply of claim 1 wherein said transformer rectifier module comprises a transformer, a full wave rectifier bridge, a first filter capacitor, a second filter capacitor, a TVS diode; wherein the content of the first and second substances,
the input end of the transformer is connected with an alternating current output end, the output end of the transformer is connected with an alternating voltage input end of the full-wave rectifier bridge, the TVS diode is connected in parallel with a voltage input end of a direct current input end, and the first filter capacitor and the second filter capacitor are connected in parallel with a unidirectional pulsating voltage output end of the full-wave rectifier bridge;
when the voltage transformation rectifying module is connected with alternating current voltage, the alternating current voltage is transformed through the transformer and then enters the full-wave rectifying bridge to be rectified into pulsating direct current voltage; when the transformation rectifying module is connected with the direct-current voltage, the transformer does not work, and the full-wave rectifying bridge is in a working state to receive the direct-current voltage.
3. The digitally controlled DC voltage regulator according to claim 1,
the voltage control module comprises a boosting circuit and a voltage reduction circuit; wherein the content of the first and second substances,
the boosting circuit comprises a boosting chip and a boosting chip peripheral circuit, and the boosting chip peripheral circuit are used for boosting the voltage output by the voltage transformation rectifying module to 73-77V;
the voltage reduction circuit comprises a first voltage reduction chip, a second voltage reduction chip, a third voltage reduction chip, a fourth voltage reduction chip, a first voltage reduction chip peripheral circuit, a second voltage reduction chip peripheral circuit, a third voltage reduction chip peripheral circuit and a fourth voltage reduction chip peripheral circuit, wherein the voltage output by the voltage transformation rectification module is reduced to 4.9-5.1V through the fourth voltage reduction chip and the third voltage reduction chip, and is reduced to 3.29-3.31V through the second voltage reduction chip and the first voltage reduction chip;
the processor control module comprises a micro control chip and a micro control chip peripheral circuit, and is connected with the voltage reduction circuit.
4. The digitally controlled regulated direct current power supply of claim 1 wherein said D/a conversion module comprises a first digital to analog conversion chip, a second digital to analog conversion chip, a first comparable operational amplifier, a second comparable operational amplifier, a first diode, a second diode, an output controller, a terminal, a first digital to analog conversion chip peripheral circuit, a second comparable operational amplifier peripheral circuit; wherein the content of the first and second substances,
the processor control module is connected with the input ends of the first digital-to-analog conversion chip and the second digital-to-analog conversion chip, the output ends of the first digital-to-analog conversion chip and the second digital-to-analog conversion chip are respectively connected with the input ends of the first same-phase proportional operational amplifier and the second same-phase proportional operational amplifier, the output ends of the first same-phase proportional operational amplifier and the second same-phase proportional operational amplifier are respectively connected with the output controller, the output controller controls whether a numerical control direct current stabilized power supply outputs voltage, and the binding post is connected with the output controller and used as an output port of the numerical control direct current stabilized power supply;
the first diode and the second diode are respectively connected with the output end of the second in-phase proportional operational amplifier and used for protecting the output of the second in-phase proportional operational amplifier and preventing reverse breakdown caused by static electricity.
5. The digitally controlled DC voltage-stabilized power supply according to claim 1, further comprising an overcurrent and EMC protection module connected to the processor control module, wherein the overcurrent and EMC protection module comprises a current detection chip and a current detection chip peripheral circuit, the current detection chip detects an output current signal of the digitally controlled DC voltage-stabilized power supply and sends the output current signal to the processor control module, and the processor control module controls the digital DC voltage-stabilized power supply to be turned on and off and sends an early warning signal when the digital DC voltage-stabilized power supply is turned off.
6. The digitally controlled DC voltage regulator power supply of claim 5, wherein the over-current and EMC protection module further comprises a first clamping diode and a second clamping diode; wherein the content of the first and second substances,
the first clamping diode and the second clamping diode are connected with the output end of the current detection chip and used for output protection and preventing reverse breakdown caused by static electricity.
7. The digitally controlled DC voltage-stabilized power supply according to claim 4, further comprising an A/D sampling module connected to the processor control module, wherein the A/D sampling module collects an output voltage signal of the digitally controlled DC voltage-stabilized power supply and sends the output voltage signal to the processor control module, and the processor control module controls the magnitude of the output voltage by comparing the output voltage signal with a preset value, thereby forming a voltage closed-loop control system.
8. The digitally controlled regulated direct current power supply of claim 7, wherein said a/D sampling module comprises a first operational amplifier, a second operational amplifier, a first operational amplifier peripheral circuit and a second operational amplifier peripheral circuit; wherein the content of the first and second substances,
the input ends of the first operational amplifier and the second operational amplifier are respectively connected with the output ends of the second in-phase proportional operational amplifier and the first same-phase proportional operational amplifier, and the output ends of the first operational amplifier and the second operational amplifier are respectively connected with the processor control module and used for controlling the output voltage to form a voltage closed-loop control system.
9. The digitally controlled DC voltage-stabilized power supply of claim 3, further comprising an interaction module for implementing human-computer interaction, controlling voltage output, receiving external commands, and controlling output on-off.
10. The digitally controlled regulated direct current power supply according to claim 9, wherein said interactive module comprises a local interactive module and/or a remote interactive module; wherein the content of the first and second substances,
the local interaction module comprises a driving chip, a nixie tube, a voltage adjusting knob, an output enabling button, a driving chip peripheral circuit and a nixie tube peripheral circuit;
the micro control chip is connected with the driving chip and used for driving the nixie tube to display voltage or current values, and the micro control chip is respectively connected with the voltage adjusting knob and the output enabling button and used for controlling the voltage output of the numerical control direct current stabilized power supply;
the remote interaction module comprises a WiFi module or a Bluetooth module and is used for carrying out wireless communication with the micro control chip.
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| CN202110698759.1A CN113359923A (en) | 2021-06-23 | 2021-06-23 | Digital controlled DC voltage-stabilized source |
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| CN202110698759.1A CN113359923A (en) | 2021-06-23 | 2021-06-23 | Digital controlled DC voltage-stabilized source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016585A (en) * | 2022-06-30 | 2022-09-06 | 天水七四九电子有限公司 | Program-controlled direct-current power supply system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004193996A (en) * | 2002-12-11 | 2004-07-08 | Samsung Electronics Co Ltd | Numerically controlled oscillator, digital frequency converter and radio equipment |
| CN205193648U (en) * | 2015-12-14 | 2016-04-27 | 河南城建学院 | Numerical control direct current source device based on singlechip |
| CN205787998U (en) * | 2016-07-13 | 2016-12-07 | 吉首大学 | A kind of visualization Digital DC Voltage-stabilized Power Source |
| CN106527298A (en) * | 2016-12-29 | 2017-03-22 | 南宁职业技术学院 | Linear voltage-reduction numerical control power supply |
| CN207895336U (en) * | 2017-12-11 | 2018-09-21 | 武汉大学 | Portable numerical control D.C. regulated power supply |
-
2021
- 2021-06-23 CN CN202110698759.1A patent/CN113359923A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004193996A (en) * | 2002-12-11 | 2004-07-08 | Samsung Electronics Co Ltd | Numerically controlled oscillator, digital frequency converter and radio equipment |
| CN205193648U (en) * | 2015-12-14 | 2016-04-27 | 河南城建学院 | Numerical control direct current source device based on singlechip |
| CN205787998U (en) * | 2016-07-13 | 2016-12-07 | 吉首大学 | A kind of visualization Digital DC Voltage-stabilized Power Source |
| CN106527298A (en) * | 2016-12-29 | 2017-03-22 | 南宁职业技术学院 | Linear voltage-reduction numerical control power supply |
| CN207895336U (en) * | 2017-12-11 | 2018-09-21 | 武汉大学 | Portable numerical control D.C. regulated power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016585A (en) * | 2022-06-30 | 2022-09-06 | 天水七四九电子有限公司 | Program-controlled direct-current power supply system |
| CN115016585B (en) * | 2022-06-30 | 2023-11-10 | 天水七四九电子有限公司 | Program-controlled direct-current power supply system |
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