CN115632555A - Data transmission isolation power supply and data isolation transmission method - Google Patents

Data transmission isolation power supply and data isolation transmission method Download PDF

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Publication number
CN115632555A
CN115632555A CN202211006420.1A CN202211006420A CN115632555A CN 115632555 A CN115632555 A CN 115632555A CN 202211006420 A CN202211006420 A CN 202211006420A CN 115632555 A CN115632555 A CN 115632555A
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China
Prior art keywords
data
output voltage
preset output
converter
transmitted
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Inventor
许航宇
客金坤
关兆亮
池浦田
许京涛
冯静波
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State Grid Smart Grid Research Institute Co ltd
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State Grid Smart Grid Research Institute Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention provides an isolation power supply for data transmission and a data isolation transmission method, wherein the isolation power supply comprises: the data coding device comprises a data coding controller, a PWM converter and a data decoder, wherein the output end of the data coding controller is connected with the input end of the PWM converter, and the output end of the PWM converter is connected with the input end of the data decoder; the data coding controller is used for generating a PWM control signal according to the data to be transmitted and adjusting the duty ratio of the PWM control signal according to a preset output voltage; the PWM converter is used for converting the input voltage into preset output voltage according to the PWM control signal and outputting the preset output voltage; the data decoder is used for collecting the preset output voltage, decoding the preset output voltage and restoring the data to be transmitted. By implementing the present invention, the number of isolation devices used is reduced by multiplexing the PWM converters.

Description

Data transmission isolation power supply and data isolation transmission method
Technical Field
The invention relates to the technical field of turn-off device driving, in particular to an isolation power supply for data transmission and a data isolation transmission method.
Background
Semiconductor turn-off devices represented by IGBTs and MOSFETs are key core elements of power electronic power conversion devices, and are widely applied to the fields of small-sized home appliances, electric automobiles, rail traffic, smart grids, aerospace and the like.
The drive control circuit is used as a signal transmission and implementation carrier, can automatically receive and convert signals of the control device, controls the on and off of the turn-off device and protects the electronic device, and optimizes the use performance of the device. The main circuit is used for providing a driving power supply for the turnoff device.
In practical application, the driving control circuit and the main circuit operate independently, and power and data transmission is carried out through respective circuits. However, the circuit structure undoubtedly increases the number of devices used, and increases the production cost.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of high production cost caused by the independent operation of the driving control circuit and the main circuit in the prior art, so as to provide an isolated power supply for data transmission and a data isolated transmission method.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides an isolated power supply for data transmission, including: a data encoding controller, a PWM (Pulse Width Modulation) converter and a data decoder, wherein,
the output end of the data coding controller is connected with the input end of the PWM converter, and the output end of the PWM converter is connected with the input end of the data decoder;
the data coding controller is used for generating a PWM control signal according to data to be transmitted and adjusting the duty ratio of the PWM control signal according to a preset output voltage;
the PWM converter is used for converting an input voltage into the preset output voltage according to the PWM control signal and outputting the preset output voltage;
the data decoder is used for collecting the preset output voltage, decoding the preset output voltage and restoring the data to be transmitted.
Optionally, the PWM converter includes: a forward converter or a flyback converter or a push-pull converter or a half-bridge converter or a full-bridge converter.
Optionally, when the PWM converter includes the flyback converter, the flyback converter includes: a flyback transformer, a first switch module, a first capacitor and a first diode, wherein,
the primary side dotted terminal of the flyback transformer is externally connected with an input voltage, the primary side dotted terminal of the flyback transformer is connected with the first end of the first switch module, the secondary side dotted terminal of the flyback transformer is connected with one end of the first capacitor through the first diode and outputs the preset output voltage, and the secondary side dotted terminal of the flyback transformer is connected with the other end of the first capacitor and then grounded;
the control end of the first switch module is connected with the output end of the data coding controller, and the second end of the first switch module is grounded;
and the two ends of the secondary side of the flyback transformer are also connected with the two ends of the data decoder.
Optionally, when the PWM converter comprises the push-pull converter, the push-pull converter comprises: a three-winding transformer, a second switch module, a third switch module, a second capacitor and a rectifier bridge, wherein,
the primary side first winding synonym end of the three-winding transformer is connected with the first end of the second switch module, the primary side first winding synonym end of the three-winding transformer and the primary side second winding synonym end of the three-winding transformer are externally connected with input voltage, the primary side second winding synonym end of the three-winding transformer is connected with the first end of the third switch module, the secondary side synonym end of the three-winding transformer is connected with the first input end of the rectifier bridge, the secondary side synonym end of the three-winding transformer is connected with the second input end of the rectifier bridge, the first output end of the rectifier bridge is connected with one end of the second capacitor and outputs the preset output voltage, and the second output end of the rectifier bridge is connected with the other end of the second capacitor and then grounded;
the control end of the second switch module is connected with the first output end of the data coding controller, and the second end of the second switch module is grounded;
the control end of the third switch module is connected with the second output end of the data coding controller, and the second end of the third switch module is grounded;
and the two ends of the secondary side of the three-winding transformer are also connected with the two ends of the data decoder.
In a second aspect, an embodiment of the present invention provides a data isolation transmission method, which is applied to the isolation power supply for data transmission in the first aspect of the embodiment of the present invention, where the data isolation transmission method includes:
converting data to be transmitted into PWM control signals according to a Manchester encoding rule, and adjusting the duty ratio of the PWM control signals according to preset output voltage;
converting the input voltage into the preset output voltage according to the PWM control signal and outputting the preset output voltage;
and collecting the preset output voltage, decoding the preset output voltage by using a Manchester encoding rule, and restoring the data to be transmitted.
Optionally, each period of the PWM control signal corresponds to each bit of data in the data to be transmitted, and the converting the data to be transmitted into the PWM control signal according to the manchester encoding rule includes:
for data 0 in the data to be transmitted, changing the PWM control signal from high level to low level in a period corresponding to the data;
and for data '1' in the data to be transmitted, changing the PWM control signal from low level to high level in a period corresponding to the data.
Optionally, the decoding the preset output voltage by using the manchester encoding rule to restore the data to be transmitted includes:
for a period that the preset output voltage is changed from a high level to a low level, restoring the preset output voltage to be data '0' in the data to be transmitted;
and for the period that the preset output voltage is changed from low level to high level, restoring the preset output voltage into data '1' in the data to be transmitted.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions are configured to cause the computer to execute the data isolation transmission method according to the first aspect of the embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computer device, including: the data isolation transmission method comprises a memory and a processor, wherein the memory and the processor are connected in communication with each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the data isolation transmission method according to the first aspect of the embodiment of the invention.
The technical scheme of the invention has the following advantages:
the invention provides an isolated power supply for data transmission, which comprises: the data coding device comprises a data coding controller, a PWM converter and a data decoder, wherein the output end of the data coding controller is connected with the input end of the PWM converter, and the output end of the PWM converter is connected with the input end of the data decoder; the data coding controller is used for generating a PWM control signal according to data to be transmitted and adjusting the duty ratio of the PWM control signal according to a preset output voltage; the PWM converter is used for converting the input voltage into preset output voltage according to the PWM control signal and outputting the preset output voltage; the data decoder is used for collecting the preset output voltage, decoding the preset output voltage and restoring the data to be transmitted. And generating a PWM control signal with adjustable duty ratio through a data coding controller, and further controlling a PWM converter to realize the transmission of electric energy according to the PWM control signal. Meanwhile, the data decoder is used for decoding the preset output voltage to restore the data to be transmitted, and synchronous transmission of power and data transmission is realized through multiplexing of the PWM converter, so that the use number of isolation devices is reduced.
The invention provides a data isolation transmission method, which comprises the following steps: converting data to be transmitted into PWM control signals according to a Manchester coding rule, and adjusting the duty ratio of the PWM control signals according to preset output voltage; converting the input voltage into a preset output voltage according to the PWM control signal and outputting the preset output voltage; and collecting a preset output voltage, decoding the preset output voltage, and restoring the data to be transmitted by using a Manchester encoding rule. And generating a PWM control signal with adjustable duty ratio according to a Manchester encoding rule, and controlling a PWM converter to realize the transmission of electric energy according to the PWM control signal. Meanwhile, the preset output voltage is decoded, the data to be transmitted are restored, synchronous transmission of power and data transmission is achieved through multiplexing of the PWM converter, and the number of used isolation devices is reduced.
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 schematic block diagram of a specific example of an isolated power supply for data transmission in an embodiment of the present invention;
FIG. 2 is a data encoding PWM waveform based on Manchester encoding according to an embodiment of the present invention;
FIG. 3 is a data isolation power supply of a flyback converter topology in an embodiment of the present invention;
FIG. 4 is a key waveform of data transmission under the topology of the flyback transformer in the embodiment of the present invention;
FIG. 5 is a data isolation power supply for a push-pull converter topology according to an embodiment of the present invention;
FIG. 6 shows key waveforms for data transmission under the push-pull converter topology according to an embodiment of the present invention;
fig. 7 is a flowchart of a specific example of a data isolation transmission method according to an embodiment of the present invention;
fig. 8 is a composition diagram of one specific example of a computer apparatus provided in the present invention.
Reference numerals:
1-a data encoding controller; 2-a PWM converter; 3-a data decoder; t1-flyback transformer; q1-a first switch module; c1-a first capacitor; d1 a first diode; a T2-three winding transformer; q2-a second switch module; q3-a third switch module; c2-a second capacitor; DB-rectifier bridge; VIN-input voltage; VOUT-preset output voltage.
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 connected through the inside of the two elements, or may be connected wirelessly or through a wire. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, 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.
Currently, power isolation is generally unidirectional, i.e., power is transmitted from the power input to the drive through the isolated converter. Signal isolation requires transmission of data such as drive control signals and operating modes from the signal side to the power side. The signal isolation mode mainly adopts optical isolation, capacitor isolation and pulse transformer isolation which are all isolated and independent from a power supply. This results in that the electrical isolation of the control signal from the power section has to be taken into account.
In order to avoid adding an isolation device, embodiments of the present invention provide an isolation power supply for data transmission. As shown in fig. 1, includes: the data coding device comprises a data coding controller 1, a PWM converter 2 and a data decoder 3, wherein the output end of the data coding controller 1 is connected with the input end of the PWM converter 2, and the output end of the PWM converter 2 is connected with the input end of the data decoder 3.
In an embodiment, the data encoding controller 1 is configured to generate a PWM control signal according to data to be transmitted, and adjust a duty ratio of the PWM control signal according to a preset output voltage. The PWM converter 2 is configured to convert the input voltage into a preset output voltage according to the PWM control signal and output the preset output voltage. The data decoder 3 is used for collecting preset output voltage, decoding the preset output voltage and restoring the data to be transmitted.
In the embodiment of the invention, the data coding controller 1 converts the data to be transmitted into the PWM control signal according to the manchester coding rule and the duty ratio required by the PWM converter 2. Each switching period corresponds to 1 bit of data, and for data '0', the high level is changed into the low level in the period; for data "1", the low level is changed to the high level in this period. Whether data "0" or data "1", the duty ratio of the high level in the period is the duty ratio, as shown in fig. 2. Further, the PWM control signal is a square wave signal with a fixed period, and the duty ratio, i.e., the duty ratio, of the high level in the switching period is adjusted according to the preset output voltage. In the embodiment of the invention, the preset output voltage is determined according to a target driving device connected into the main circuit, and the preset output voltage is the driving voltage of the target driving device.
Further, the PWM converter 2 includes a switching tube, an isolation transformer and other passive devices, and the output voltage thereof is determined by the PWM control signal of the switching tube. The switch tube can be a fully-controlled semiconductor device such as MOSFET, IGBT, siC, gaN and the like. Specifically, the topology of the PWM converter 2 may be a forward converter, a flyback converter, a push-pull converter, a half-bridge converter, a full-bridge converter, or the like. The power supply can realize power and data transmission by multiplexing the isolation transformer, and reduces the use number of isolation devices. And moreover, the isolation transformer is multiplexed, so that power isolation and signal isolation can be synchronously realized, and the problem of large potential difference between the control circuit and the main circuit is solved.
Further, the PWM control signal generated by the data encoding controller 1 controls the on/off of the switching tube to realize the transmission of electric energy, and the same logic voltage square wave is generated on the secondary side of the isolation transformer. The data decoder 3 collects the voltage square waves, decodes the voltage square waves by using a Manchester encoding rule, and restores the transmitted data, so that the data transmission is realized.
The invention provides an isolated power supply for data transmission, which comprises: the data coding device comprises a data coding controller, a PWM converter and a data decoder, wherein the output end of the data coding controller is connected with the input end of the PWM converter, and the output end of the PWM converter is connected with the input end of the data decoder; the data coding controller is used for generating a PWM control signal according to data to be transmitted and adjusting the duty ratio of the PWM control signal according to a preset output voltage; the PWM converter is used for converting the input voltage into preset output voltage according to the PWM control signal and outputting the preset output voltage; the data decoder is used for collecting preset output voltage, decoding the preset output voltage and restoring the data to be transmitted. And generating a PWM control signal with adjustable duty ratio through a data coding controller, and further controlling a PWM converter to realize the transmission of electric energy according to the PWM control signal. Meanwhile, the data decoder is used for decoding the preset output voltage to restore the data to be transmitted, and synchronous transmission of power and data transmission is realized through multiplexing of the PWM converter, so that the use number of isolation devices is reduced.
In one embodiment, as shown in fig. 3, when the PWM converter includes a flyback converter, the flyback converter includes: the flyback converter comprises a flyback transformer T1, a first switch module Q1, a first capacitor C1 and a first diode D1.
In a specific embodiment, a primary side homonymous end of a flyback transformer T1 is externally connected with an input voltage VIN, a primary side synonym end of the flyback transformer T1 is connected with a first end of a first switch module Q1, a secondary side synonym end of the flyback transformer T1 is connected with one end of a first capacitor C1 through a first diode D1 and outputs a preset output voltage VOUT, and a secondary side homonymous end of the flyback transformer T1 is connected with the other end of the first capacitor C1 and then grounded; the control end of the first switch module Q1 is connected with the output end of the data coding controller 1, and the second end of the first switch module Q1 is grounded; the two ends of the secondary side of the flyback transformer T1 are also connected to the two ends of the data decoder 3.
In the embodiment of the present invention, the first switch module Q1 includes a field effect transistor and a diode connected in anti-parallel with the field effect transistor. Wherein, the field effect transistor is an N-channel MOSFET. Specifically, the drain of the field effect transistor is connected with the primary-side synonym terminal of the flyback transformer T1, the gate of the field effect transistor is connected with the output terminal of the data encoding controller 1, and the source of the field effect transistor is grounded.
Further, the data encoding controller 1 generates a PWM control signal according to the manchester encoding rule and the duty ratio, and sends the PWM control signal to the gate of the first switching module Q1 to control the on and off of the first switching module Q1. A voltage waveform that is inverted with respect to the PWM control signal is generated on the primary side of the flyback transformer T1. According to the dotted terminal of the flyback transformer T1 and the characteristics of the flyback transformer T1, the voltage waveform of the secondary side of the flyback transformer T1 is opposite in phase to the primary side, i.e., in phase with the PWM control signal. The data decoder 3 decodes the signal by detecting the high/low level logic of the secondary side voltage waveform of the flyback transformer T1. The duty ratio is determined according to the input and output voltage, and the size of the duty ratio can be adjusted without influencing the accuracy of data transmission. The key waveforms are shown in figure 4. In the embodiment of the invention, power and data transmission can be realized by multiplexing the flyback transformer T1, the using number of isolation devices is reduced, and the production cost is reduced.
In one embodiment, as shown in fig. 5, when the PWM converter includes a push-pull converter, the push-pull converter includes: the three-winding transformer T2, the second switch module Q2, the third switch module Q3, the second capacitor C2 and the rectifier bridge DB.
In a specific embodiment, as shown in fig. 5, the synonym end of the first winding on the primary side of the three-winding transformer T2 is connected to the first end of the second switch module Q2, the synonym end of the first winding on the primary side of the three-winding transformer T2 and the synonym end of the second winding on the primary side of the three-winding transformer T2 are both externally connected to the input voltage VIN, the synonym end of the second winding on the primary side of the three-winding transformer T2 is connected to the first end of the third switch module Q3, the synonym end of the secondary side of the three-winding transformer T2 is connected to the first input end of the rectifier bridge DB, the synonym end of the secondary side of the three-winding transformer T2 is connected to the second input end of the rectifier bridge DB, the first output end of the rectifier bridge DB is connected to one end of the second capacitor C2 and outputs the preset output voltage VOUT, and the second output end of the rectifier bridge DB is connected to the other end of the second capacitor C2 and then grounded; the control end of the second switch module Q2 is connected with the first output end of the data coding controller 1, and the second end of the second switch module Q2 is grounded; the control end of the third switch module Q3 is connected with the second output end of the data coding controller 1, and the second end of the third switch module Q3 is grounded; and two ends of the secondary side of the three-winding transformer T2 are also connected with two ends of the data decoder 3.
In the embodiment of the present invention, the rectifier bridge DB is composed of 4 diodes. The second switch module Q2 and the third switch module Q3 both include a field effect transistor and a diode connected in anti-parallel with the field effect transistor. Wherein, the field effect transistor is an N-channel MOSFET. Specifically, the drain of the field effect transistor in the second switch module Q2 is connected to the synonym terminal of the first winding on the primary side of the three-winding transformer T2, the gate thereof is connected to the first output terminal of the data encoding controller 1, and the source thereof is grounded. The drain electrode of the field effect tube in the third switch module Q3 is connected with the homonymous end of the second winding at the primary side of the three-winding transformer T2, the grid electrode of the third switch module Q3 is connected with the second output end of the data coding controller 1, and the source electrode of the third switch module Q3 is grounded.
Further, the data encoding controller 1 provides PWM control signals for the second switching module Q2 and the third switching module Q3, where the two PWM control signals are both 50% duty ratio, and the two control signals are complementary. According to the same-name terminal arrangement of the three-winding transformer T2 in fig. 5, the secondary voltage waveform is in phase with the driving signal of the second switch module Q2, so that the data encoding controller 1 sends the PWM control signal after data encoding to the second switch module Q2 and sends the inverted signal to the third switch module Q3. The data decoder 3 collects the secondary side voltage of the three-winding transformer T2 and carries out logic processing on the waveform to restore the waveform into original data. The key waveforms are shown in figure 6. In the embodiment of the invention, power and data transmission can be realized by multiplexing the three-winding transformer T2.
The embodiment of the invention provides a data isolation transmission method which is applied to an isolation power supply for data transmission. As shown in fig. 7, the data isolation transmission method includes the following steps:
step S1: and converting the data to be transmitted into PWM control signals according to a Manchester coding rule, and adjusting the duty ratio of the PWM control signals according to preset output voltage.
Step S2: and converting the input voltage into a preset output voltage according to the PWM control signal and outputting the preset output voltage.
And step S3: and collecting the preset output voltage, decoding the preset output voltage by using a Manchester encoding rule, and restoring the data to be transmitted.
In a specific embodiment, the data encoding controller 1 converts the data to be transmitted into the PWM control signal according to the manchester encoding rule and the duty ratio required by the PWM converter 2. Each period of the PWM control signal corresponds to each bit of data in the data to be transmitted one by one, and for data '0' in the data to be transmitted, the PWM control signal is changed from high level to low level in the period corresponding to the bit of data; for data "1" in data to be transmitted, the PWM control signal is changed from low level to high level in a period corresponding to the bit data. Whether it is data "0" or data "1", the duty ratio of the high level in the period is the duty ratio, as shown in fig. 2. Further, the PWM control signal is a square wave signal with a fixed period, and the duty ratio, i.e., the duty ratio, of the high level in the switching period is adjusted according to the preset output voltage.
Further, the PWM control signal generated by the data encoding controller 1 realizes the transmission of electric energy by controlling the on/off of the switching tube in the PWM converter 2, and the secondary side of the isolation transformer in the PWM converter 2 generates voltage square waves of the same logic. The data decoder 3 collects the voltage square wave, decodes the voltage square wave by using a Manchester coding rule, and restores the transmitted data, thereby realizing the data transmission.
Specifically, when the data decoder 3 performs decoding by using the manchester encoding rule and restores the transmitted data, the preset output voltage is restored to "0" in the data to be transmitted in a period in which the preset output voltage is changed from a high level to a low level; and for the period that the preset output voltage is changed from the low level to the high level, restoring the preset output voltage to data '1' in the data to be transmitted.
The invention provides a data isolation transmission method, which comprises the following steps: converting data to be transmitted into PWM control signals according to a Manchester coding rule, and adjusting the duty ratio of the PWM control signals according to preset output voltage; converting the input voltage into a preset output voltage according to the PWM control signal and outputting the preset output voltage; and collecting the preset output voltage, decoding the preset output voltage by using a Manchester encoding rule, and restoring the data to be transmitted. And generating a PWM control signal with adjustable duty ratio according to a Manchester encoding rule, and controlling a PWM converter to realize the transmission of electric energy according to the PWM control signal. Meanwhile, the preset output voltage is decoded, the data to be transmitted are restored, synchronous transmission of power and data transmission is achieved through multiplexing of the PWM converter, and the number of used isolation devices is reduced.
An embodiment of the present invention provides a computer device, as shown in fig. 8, the device may include a processor 81 and a memory 82, where the processor 81 and the memory 82 may be connected by a bus or by other means, and fig. 8 takes the connection by the bus as an example.
Processor 81 may be a Central Processing Unit (CPU). The Processor 81 may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 82, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as the corresponding program instructions/modules in embodiments of the present invention. The processor 81 executes various functional applications and data processing of the processor by executing non-transitory software programs, instructions and modules stored in the memory 82, that is, implements the data isolation transmission method in the above method embodiment.
The memory 82 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 81, and the like. Further, the memory 82 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 82 may optionally include memory located remotely from the processor 81, which may be connected to the processor 81 via a network. Examples of such networks include, but are not limited to, the internet, intranets, mobile communication networks, and combinations thereof.
One or more modules are stored in the memory 82 and when executed by the processor 81 perform the data isolation transmission method in the embodiment shown in fig. 7.
The details of the computer device can be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to fig. 7, and are not described herein again.
Those skilled in the art will appreciate that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer readable storage medium and can include the processes of the embodiments of the methods described above when executed. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
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. This need not be, nor should it be 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 (9)

1. An isolated power supply for data transmission, comprising: a data encoding controller, a PWM converter, and a data decoder, wherein,
the output end of the data coding controller is connected with the input end of the PWM converter, and the output end of the PWM converter is connected with the input end of the data decoder;
the data coding controller is used for generating a PWM control signal according to data to be transmitted and adjusting the duty ratio of the PWM control signal according to a preset output voltage;
the PWM converter is used for converting an input voltage into the preset output voltage according to the PWM control signal and outputting the preset output voltage;
the data decoder is used for collecting the preset output voltage, decoding the preset output voltage and restoring the data to be transmitted.
2. The isolated power supply for data transmission according to claim 1, wherein the PWM converter comprises: a forward converter or a flyback converter or a push-pull converter or a half-bridge converter or a full-bridge converter.
3. The isolated power supply for data transmission according to claim 2, wherein when the PWM converter comprises the flyback converter, the flyback converter comprises: a flyback transformer, a first switch module, a first capacitor and a first diode, wherein,
the primary side dotted terminal of the flyback transformer is externally connected with an input voltage, the primary side dotted terminal of the flyback transformer is connected with the first end of the first switch module, the secondary side dotted terminal of the flyback transformer is connected with one end of the first capacitor through the first diode and outputs the preset output voltage, and the secondary side dotted terminal of the flyback transformer is connected with the other end of the first capacitor and then grounded;
the control end of the first switch module is connected with the output end of the data coding controller, and the second end of the first switch module is grounded;
and the two ends of the secondary side of the flyback transformer are also connected with the two ends of the data decoder.
4. The isolated power supply for data transmission according to claim 2, wherein when the PWM converter comprises the push-pull converter, the push-pull converter comprises: a three-winding transformer, a second switch module, a third switch module, a second capacitor and a rectifier bridge, wherein,
the primary side first winding synonym end of the three-winding transformer is connected with a first end of the second switch module, the primary side first winding synonym end of the three-winding transformer and the primary side second winding synonym end of the three-winding transformer are externally connected with input voltage, the primary side second winding synonym end of the three-winding transformer is connected with a first end of the third switch module, the secondary side synonym end of the three-winding transformer is connected with a first input end of the rectifier bridge, the secondary side synonym end of the three-winding transformer is connected with a second input end of the rectifier bridge, a first output end of the rectifier bridge is connected with one end of the second capacitor and outputs the preset output voltage, and a second output end of the rectifier bridge is connected with the other end of the second capacitor and then grounded;
the control end of the second switch module is connected with the first output end of the data coding controller, and the second end of the second switch module is grounded;
the control end of the third switch module is connected with the second output end of the data coding controller, and the second end of the third switch module is grounded;
and the two ends of the secondary side of the three-winding transformer are also connected with the two ends of the data decoder.
5. A data isolation transmission method, wherein the data isolation transmission method is applied to the isolation power supply for data transmission according to any one of claims 1 to 4, and the data isolation transmission method comprises the following steps:
converting data to be transmitted into PWM control signals according to a Manchester encoding rule, and adjusting the duty ratio of the PWM control signals according to preset output voltage;
converting the input voltage into the preset output voltage according to the PWM control signal and outputting the preset output voltage;
and collecting the preset output voltage, decoding the preset output voltage by using the Manchester encoding rule, and restoring the data to be transmitted.
6. The data isolation transmission method according to claim 5, wherein each period of the PWM control signal corresponds to each bit of data in the data to be transmitted, and the converting of the data to be transmitted into the PWM control signal according to the Manchester encoding rule comprises:
for data 0 in the data to be transmitted, changing the PWM control signal from high level to low level in a period corresponding to the data;
and for data 1 in the data to be transmitted, changing the PWM control signal from low level to high level in a period corresponding to the data.
7. The method for isolated transmission of data according to claim 6, wherein the decoding the preset output voltage by using the Manchester encoding rule to restore the data to be transmitted comprises:
for the period that the preset output voltage is changed from a high level to a low level, restoring the preset output voltage to be data '0' in the data to be transmitted;
and for the period that the preset output voltage is changed from low level to high level, restoring the preset output voltage to be data '1' in the data to be transmitted.
8. A computer-readable storage medium having stored thereon computer instructions for causing the computer to perform the method for isolated transmission of data according to any of claims 5-7.
9. A computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the data isolation transmission method according to any one of claims 5 to 7.
CN202211006420.1A 2022-08-22 2022-08-22 Data transmission isolation power supply and data isolation transmission method Pending CN115632555A (en)

Priority Applications (1)

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CN202211006420.1A CN115632555A (en) 2022-08-22 2022-08-22 Data transmission isolation power supply and data isolation transmission method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211006420.1A CN115632555A (en) 2022-08-22 2022-08-22 Data transmission isolation power supply and data isolation transmission method

Publications (1)

Publication Number Publication Date
CN115632555A true CN115632555A (en) 2023-01-20

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