An isolated active gate drive device and method for simultaneous energy and information transmission

Abstract

The application discloses an energy and information simultaneous transmission isolation type active gate drive device and method. The device comprises a control side unit, a power side drive unit and a single magnetic coupling channel. The single magnetic coupling channel is provided with an energy supply frequency subchannel, a forward communication frequency subchannel and a reverse communication frequency subchannel, so that the energy supply carrier can continuously run during bidirectional communication. The control side unit generates a drive parameter configuration and sends the drive parameter configuration to the power side drive unit through the forward communication frequency subchannel. After receiving valid configuration confirmation information, the control side unit transmits a drive trigger signal and generates a next round of drive parameter configuration based on state feedback information. The power side drive unit receives and loads the drive parameter configuration, returns confirmation information, responds to the drive trigger signal, executes corresponding drive actions and returns state feedback information. The application can maintain continuous power supply on the power side while reducing the number of isolation links, and improves the integration and interaction reliability of the system.

Description

Technical Field

[0001] This invention belongs to the field of power electronics technology, specifically relating to an isolated active gate driving device and method for simultaneous energy and information transmission. Background Technology

[0002] In high-voltage, high-power-density power electronic conversion systems, gate drivers typically require isolated power supply and signal links between the control and power sides to drive power semiconductor devices on the high-voltage floating ground side. For active gate drive applications, in addition to the basic PWM trigger signal, adjustable drive parameters such as turn-on and turn-off resistors and additional turn-on and turn-off delays need to be sent out, and the power side status or switching process characteristics need to be fed back to support online adjustment of drive parameters.

[0003] Existing solutions typically employ multiple independent isolated links to achieve isolated power supply, control signal transmission, and status feedback. This results in a large number of isolation devices, a large board area, and a complex interconnect structure. It may also increase common-mode interference coupling paths and reduce the reliability of signal transmission under high dv / dt conditions. To reduce the number of isolated links, another approach uses time-division multiplexing to share a single magnetic coupling channel, achieving multiplexing of power supply and communication functions by switching time slots between power transmission and signal transmission. However, this approach may affect the continuous power supply to the controlled circuit, and the time slot switching process may reduce the real-time performance of status feedback and parameter configuration.

[0004] Therefore, there is an urgent need to propose an active gate drive technology that can reduce the number of isolation links, maintain continuous power supply, and support reliable bidirectional information exchange. Summary of the Invention

[0005] The purpose of this invention is to provide an isolated active gate driving device and method for simultaneous energy and information transmission. This invention enables coordinated transmission of continuous power supply and bidirectional communication within a single magnetically coupled channel, reducing the number of isolation devices and improving system integration and drive interaction reliability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an isolated active gate driving device for simultaneous transmission of energy and information, comprising a control side unit, a power side driving unit, and a single magnetic coupling channel connecting the control side unit and the power side driving unit; The single magnetic coupling channel is provided with a power supply frequency sub-channel, a forward communication frequency sub-channel, and a reverse communication frequency sub-channel; the power supply frequency sub-channel is used to transmit a power supply carrier; the forward communication frequency sub-channel is used to transmit a forward communication signal, and the reverse communication frequency sub-channel is used to transmit a reverse communication signal; the power supply frequency sub-channel maintains continuous operation while transmitting information in the forward communication frequency sub-channel and the reverse communication frequency sub-channel; The control-side unit is used to generate drive parameter configuration and send the drive parameter configuration to the power-side drive unit through the forward communication frequency sub-channel; the control-side unit is also used to transmit drive trigger signal to the power-side drive unit through the forward communication frequency sub-channel after receiving valid configuration confirmation information, and generate the next round of drive parameter configuration according to the status feedback information returned by the power-side drive unit. The power-side drive unit is used to receive and load the drive parameter configuration, and to transmit configuration confirmation information back through the reverse communication frequency sub-channel; the power-side drive unit is also used to execute drive actions based on the confirmed drive parameter configuration after receiving the drive trigger signal, and to transmit status feedback information back through the reverse communication frequency sub-channel after executing the drive actions.

[0007] In the aforementioned isolated active gate drive device for simultaneous energy and information transmission, the power supply frequency sub-channel, the forward communication frequency sub-channel, and the reverse communication frequency sub-channel are located in different frequency bands, and a frequency protection interval is provided between adjacent frequency sub-channels. The frequency protection interval is used to suppress frequency band crosstalk between the power supply link, the forward communication link, and the reverse communication link.

[0008] In the aforementioned isolated active gate drive device that transmits energy and information simultaneously, the power-side drive unit is configured to trigger a status feedback window according to a preset drive execution process or a preset number of drive cycles, and to transmit status feedback information back through a reverse communication frequency sub-channel within the status feedback window; the status feedback information includes at least one of configuration confirmation status, protection status, or transient characteristic information.

[0009] The aforementioned isolated active gate drive device for simultaneous energy and information transmission includes a single magnetically coupled channel comprising a magnetic coupling structure, and based on the magnetic coupling structure, a power supply branch, a forward communication branch, and a reverse communication branch; the magnetic coupling structure includes a planar transformer or a wound transformer; the power supply branch is used to convert the received power supply carrier into local power for the power-side drive unit; the forward communication branch and the reverse communication branch include one or more of a frequency selection circuit, an envelope detection circuit, a comparison decision circuit, and a digital logic recovery circuit, to complete the transmission and recovery of forward and reverse information in the corresponding frequency sub-channels.

[0010] In the aforementioned isolated active gate drive device that transmits energy and information simultaneously, the control unit is further configured to, when not receiving valid configuration confirmation information, receiving configuration failure information, or receiving abnormal status feedback information, not to use the current round's drive parameter configuration for subsequent drive actions, and to perform at least one of the following operations: maintaining the previous round's valid drive parameter configuration, transmitting the default configuration, or entering a preset protection state.

[0011] The aforementioned isolated active gate drive device for simultaneous energy and information transmission uses a fixed-length frame structure for drive parameter configuration. This fixed-length frame structure includes a start symbol field, a target drive object identifier field, a parameter type field, a parameter value field, and a check bit field. The start symbol field identifies the beginning of the data frame; the target drive object identifier field distinguishes different power-side branches or different drive channels; the parameter type field distinguishes drive parameter types or status query commands; the parameter value field carries configuration values ​​or query parameters; and the check bit field verifies the integrity of the transmitted data.

[0012] The aforementioned isolated active gate drive device that transmits energy and information simultaneously includes a control-side unit comprising an interactive state management module for managing the cycle correspondence between drive parameter configuration, configuration confirmation information, drive trigger transmission, drive action, and state feedback information; and a power-side drive unit comprising a drive parameter receiving module, a trigger signal recovery module, and a drive execution module. The drive parameter receiving module receives and loads the drive parameter configuration, the trigger signal recovery module recovers the drive trigger signal, and the drive execution module outputs the gate drive voltage according to the loaded and confirmed drive parameter configuration.

[0013] An isolated active gate driving method for simultaneous energy and information transmission, applied to the aforementioned isolated active gate driving device, includes the following steps: Step 1: The control-side unit generates the drive parameter configuration and, under the condition that the power carrier is running continuously, sends the drive parameter configuration to the power-side drive unit through the forward communication frequency sub-channel of the single magnetic coupling channel. Step 2: The power-side drive unit receives the drive parameter configuration and sends the configuration confirmation information back to the control-side unit via the reverse communication frequency sub-channel. Step 3: After receiving valid configuration confirmation information, the control-side unit transmits a drive trigger signal to the power-side drive unit via the forward communication frequency sub-channel. Step 4: Upon receiving the drive trigger signal, the power-side drive unit executes the drive action based on the confirmed drive parameters, and after executing the drive action, it transmits status feedback information back to the control-side unit via the reverse communication frequency sub-channel. Step 5: The control unit generates the next round of drive parameter configuration based on the status feedback information.

[0014] In the aforementioned isolated active gate driving method that transmits energy and information simultaneously, the driving parameter configuration, configuration confirmation information, driving action, and status feedback information are associated in the same round. When the configuration confirmation information fails to be confirmed, the confirmation times out, or the status feedback information is abnormal, the control side unit maintains the previous round's valid driving parameter configuration, transmits the default configuration, or enters a preset protection state.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention separates power transmission from bidirectional information transmission in the frequency domain by setting up a power supply frequency sub-channel, a forward communication frequency sub-channel, and a reverse communication frequency sub-channel within a single magnetic coupling channel, thereby reducing crosstalk between the power supply link and the communication link. Compared with time-division multiplexing schemes, this invention can maintain continuous operation of the power supply carrier during bidirectional communication, thus reducing the risk of power supply interruption or voltage fluctuations on the power side.

[0016] 2. Since power supply, control information transmission and status feedback can share a single magnetic coupling structure, the present invention can reduce the number of isolation links, the number of isolation devices and primary and secondary parasitic coupling paths, which is beneficial to improving the power supply stability, system integration and signal transmission reliability under high dv / dt conditions.

[0017] 3. This invention establishes a round-robin closed-loop interaction mechanism between configuration issuance, configuration confirmation, drive triggering execution, and status feedback. This ensures that each round of the drive process requires valid configuration confirmation as a prerequisite for execution, and associates status feedback information with the corresponding round's drive parameter configuration and drive execution process. Through the aforementioned timing constraints and round-robin relationships, this invention can reduce the risks of parameter mismatch, feedback misalignment, and abnormal execution that may occur in a single-channel multiplexing environment, thereby improving the operational safety and control consistency of the active gate drive system under complex operating conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system architecture of the isolated active gate driving device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the frequency domain carrier distribution structure of a single magnetically coupled channel according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the drive parameter configuration data frame structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the driving power supply and communication interaction timing in an embodiment of the present invention; Figure 5 This is a schematic diagram of the bidirectional communication and drive control process according to an embodiment of the present invention. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] Example 1: This example provides an isolated active gate driving device that transmits energy and information simultaneously, such as... Figure 1 As shown, the device includes a control-side unit, a power-side drive unit, and a single magnetic coupling channel connecting the control-side unit and the power-side drive unit. The control-side unit is located on the low-voltage control side, and the power-side drive unit is located on the high-voltage floating ground power side. The two are electrically isolated, energy transmitted, and bidirectionally signaled transmitted through the single magnetic coupling channel.

[0021] Within the single magnetic coupling channel, a power supply frequency sub-channel, a forward communication frequency sub-channel, and a reverse communication frequency sub-channel are configured. The power supply frequency sub-channel is used to transmit a power supply carrier, the forward communication frequency sub-channel is used to transmit forward communication signals, and the reverse communication frequency sub-channel is used to transmit reverse communication signals. Forward communication is communication from the control-side unit to the power-side drive unit, and reverse communication is communication from the power-side drive unit to the control-side unit.

[0022] Specifically, the aforementioned frequency division multiplexing method separates power transmission from bidirectional information transmission in the frequency domain. The power supply carrier, forward communication signal, and reverse communication signal can be distributed in non-overlapping frequency bands. Since the power supply link and the communication link occupy different frequency sub-channels, the power supply carrier does not need to be turned off during the communication time slot as in traditional time division multiplexing schemes. This helps maintain the continuity of local power supply on the power side, reduces the risk of drive circuit reset or sample-and-hold capacitor voltage drop due to power supply interruption, and improves the system's dynamic response capability and power supply reliability.

[0023] In this embodiment, the control-side unit may include a controller, a power transmission module, a PWM output module, a feedback receiving module, a drive parameter generation module, and a state interaction management module. The power transmission module provides the energy required for the drive and utilizes a magnetic coupling channel for wireless energy transmission. The drive parameter generation module generates drive parameters, which may include at least one of the following: turn-on resistance, turn-off resistance, turn-on delay, turn-off delay, or drive voltage level. The PWM output module generates PWM trigger information. The feedback receiving module receives state feedback information from the power-side drive unit, which may include protection status or switching transient characteristic information. The interactive state management module manages the cycle correspondence between drive parameter configuration, configuration confirmation information, drive trigger signal, drive action, and state feedback information.

[0024] Specifically, the control-side unit generates the drive parameter configuration for the current round and sends it to the power-side drive unit via the forward communication frequency sub-channel. After receiving valid configuration confirmation information corresponding to the current round, the control-side unit sends a drive trigger signal to the power-side drive unit and generates the drive parameter configuration for the next round based on the state feedback information of the corresponding round. The interactive state management module can be implemented by logic units in an FPGA, ASIC, or microcontroller. This module manages data transmission and reception, round numbering, confirmation verification, trigger permission, and state feedback, and maintains the state machine so that the drive parameters for round k are only allowed to trigger the drive action of round k after receiving the corresponding valid confirmation; at the same time, the state feedback information of round k is used to update the drive parameters for round k+1. Through the above round relationship and timing constraint mechanism, the risk of parameter mismatch caused by communication delays and feedback misalignment in a single-channel multiplexing environment can be reduced.

[0025] The power-side drive unit may include a drive parameter receiving module, a PWM trigger signal recovery module, and a drive execution module. The drive parameter receiving module receives and loads drive parameter configurations, the PWM trigger signal recovery module recovers the drive trigger signal, and the drive execution module configures the output gate drive voltage according to the loaded and confirmed drive parameters.

[0026] After receiving the drive parameter configuration, the power-side drive unit parses and verifies the configuration data using the drive parameter receiving module, and writes the valid configuration data into a local register or latch. After loading the parameters, the power-side drive unit sends configuration confirmation information back to the control-side unit via the reverse communication frequency sub-channel. When the PWM trigger signal recovery module recovers a valid drive trigger signal, and the local register or latch has loaded the confirmed parameters for the corresponding round, the drive execution module executes the drive action based on the drive parameter configuration and outputs the corresponding gate drive voltage. After the drive action is executed, the power-side drive unit sends status feedback information back to the control-side unit via the reverse communication frequency sub-channel.

[0027] Through the above architecture design, the present invention can support bidirectional communication under continuous power supply conditions within a single magnetic coupling channel, and establish the correspondence between configuration, confirmation, execution and feedback through a modular round-loop interaction mechanism, thereby reducing the risk of parameter mismatch, feedback misalignment and abnormal execution, and improving the safety and control consistency of the active gate drive process.

[0028] Preferably, the power supply frequency sub-channel, the forward communication frequency sub-channel, and the reverse communication frequency sub-channel occupy different frequency bands, and a frequency protection interval is set between adjacent frequency sub-channels. The frequency protection interval is used to reduce frequency band crosstalk between the power supply link, the forward communication link, and the reverse communication link. Combined with... Figure 2The schematic diagram of the frequency domain distribution structure of a single magnetically coupled channel illustrates that the frequency planning described above allows energy transmission and bidirectional information transmission to proceed in parallel within the same magnetically coupled channel while maintaining differentiation in the frequency domain. For example, the power supply carrier can be configured in a frequency band suitable for energy transmission, while the forward and reverse communication signals can be configured in frequency bands different from and non-overlapping with the power supply carrier, with a preset frequency interval maintained between each frequency band. By setting frequency protection intervals, interference from the power supply carrier and its harmonic components to the communication frequency band can be reduced, crosstalk between the forward and reverse communication links can be reduced, and the impact of communication frequency components on the power supply link, rectifier circuit, and local power supply circuit can be minimized. This improves the signal-to-noise ratio and demodulation reliability of bidirectional communication while maintaining power supply continuity.

[0029] Furthermore, to achieve the aforementioned frequency domain distribution characteristics, this embodiment uses a single magnetic coupling structure to configure a power supply branch, a forward communication branch, and a reverse communication branch. The magnetic coupling structure provides a shared, isolated transmission path between the control-side unit and the power-side drive unit to carry the power supply carrier, forward communication signal, and reverse communication signal. The power supply branch transmits energy within the power supply frequency sub-channel, the forward communication branch transmits information sent by the control-side unit within the forward communication frequency sub-channel, and the reverse communication branch transmits information returned by the power-side drive unit within the reverse communication frequency sub-channel.

[0030] The specific form of the magnetic coupling structure can be selected based on the integration level, power level, and process requirements. For example, the magnetic coupling structure can use a planar transformer, which utilizes PCB windings to achieve a high integration design, suitable for size-sensitive power electronic modules; or it can use a wound transformer, which utilizes a magnetic core and enameled wire windings to improve coupling capability and power transmission efficiency, suitable for drive scenarios with high power and efficiency requirements.

[0031] In terms of branch circuit implementation, the input terminal of the power supply branch is connected to the primary winding via the power transmitting module and directly coupled to the secondary winding through a magnetic coupling channel. The power receiving module extracts the energy from the power supply sub-channel and performs rectification, filtering, and voltage regulation. The power supply branch also presents a high impedance characteristic to the communication frequency band to reduce the interference of the power supply link on the communication frequency components.

[0032] The forward and reverse communication branches can include one or more of the following: a frequency selection circuit, an envelope detection circuit, a comparison and decision circuit, and a digital logic recovery circuit. The frequency selection circuit extracts the target communication frequency band signal from the mixed signal transmitted through a single magnetically coupled channel and suppresses the power carrier and other interference components. The envelope detection circuit demodulates the amplitude-modulated signal. The comparison and decision circuit shapes and thresholds the demodulated analog waveform. The digital logic recovery circuit performs bit synchronization, frame synchronization, verification, and decoding to output the corresponding digital information. Through the combined configuration of these branch circuits, a single magnetically coupled channel can support bidirectional information exchange under continuous power supply conditions.

[0033] The forward and reverse communication branches can include frequency selection circuits, envelope detection circuits, and comparison and decision circuits. Specifically, the frequency selection circuit is used to accurately extract the signal of the target communication frequency band from the mixed signal and suppress the power carrier and other interference components; the envelope detection circuit and the comparison and decision circuit are used to demodulate the amplitude modulation signal and restore the high-frequency carrier to baseband data.

[0034] Preferably, the power-side drive unit should trigger a status feedback window according to a preset drive execution process or a preset number of drive cycles, and transmit status feedback information back to the control side via a reverse communication frequency sub-channel within the status feedback window. The status feedback information includes at least one of configuration confirmation status, protection status, or transient characteristic information.

[0035] The term "triggered according to a preset drive execution process" refers to associating a status feedback window with a specific drive action. For example, the feedback window is opened within a preset time after the turn-on or turn-off action corresponding to the drive trigger signal is completed, in order to transmit transient characteristic information related to that switching action. The term "triggered according to a preset number of drive cycles" refers to periodically opening the status feedback window based on the count value of the drive trigger signal, in order to transmit information that changes relatively slowly, such as estimated junction temperature, average current, supply voltage, or fault status, thereby reducing the occupancy rate of the reverse communication frequency sub-channel.

[0036] Furthermore, the configuration confirmation status is used to indicate to the control side whether the drive parameters for the current cycle have been correctly parsed and loaded into the local register; the protection status is used to indicate fault flags such as undervoltage lockout and overtemperature alarm; transient characteristic information can include characteristic quantities such as the rate of change of current during switching, switching delay time, or oscillation amplitude. These transient characteristics are not only the basis for judging the current drive effect, but also enable the control unit to generate the drive parameters for the next cycle based on the above transient characteristics, so as to realize closed-loop regulation of the drive process.

[0037] To address potential communication interference or timing mismatch risks in a single magnetically coupled channel multiplexing environment, this embodiment also includes an anomaly tolerance mechanism. Preferably, when the control unit does not receive valid configuration confirmation information, receives configuration failure information, or receives abnormal status feedback information, it will not use the current round's drive parameter configuration for subsequent drive actions and will perform at least one of the following operations: maintain the previous round's valid drive parameter configuration, transmit the default configuration, or enter a preset protection state. The abnormal feedback information may include checksum errors, field out-of-bounds errors, or timeout failures. The protection state may include at least one of drive output shutdown, fault latching, soft shutdown, undervoltage lockout, and waiting for reset.

[0038] Preferably, the drive parameter configuration adopts the following... Figure 3 The fixed-length frame structure shown includes a start symbol field to identify the start of the data frame and provide a synchronization reference; a target drive object identifier field to distinguish different power-side branches or different drive channels; a parameter type field to distinguish drive parameter types; a parameter value field to carry configuration values ​​or query parameters; and a check bit field to verify the integrity of the transmitted data. This fixed-length frame structure enables the system to transmit, receive, shift, check, and parse according to a preset clock cycle, improving the system's robustness and real-time response capability in environments with strong electromagnetic interference.

[0039] Example 2: This example provides an isolated active gate driving method that transmits energy and information simultaneously, applied to the isolated active gate driving device of Example 1 above. Combined with... Figure 4 and Figure 5 The method includes the following steps: Step 1: The control-side unit generates the drive parameter configuration for the current cycle and, under the condition of continuous operation of the power supply carrier, sends the drive configuration parameters to the power-side drive unit through the forward communication frequency sub-channel of the single magnetic coupling channel. In a specific embodiment, in... Figure 4 At time t0, the interactive state management module of the control side unit assembles and generates the k-th round drive parameter configuration frame according to the current control strategy or the feedback result of the previous round, and sends it through the forward communication carrier.

[0040] Step 2: During the time period t0 to t1, the power-side drive unit receives the drive parameter configuration, parses and verifies it, and loads it into the local effective register or latch. Subsequently, during the time period t1 to t2, the power-side drive unit sends back confirmation information corresponding to the k-th round of drive parameter configuration to the control side via the reverse communication frequency sub-channel. If parsing fails, parameters exceed limits, or target identifiers do not match, the power-side drive unit may send back configuration failure information or error codes. When the control-side unit does not receive valid configuration confirmation information or receives configuration failure information, it will prohibit sending trigger signals and perform at least one operation in the resend configuration or enter the protection strategy.

[0041] Step 3: During the time period from t2 to t3, after receiving the valid configuration confirmation information, the control side unit transmits the drive trigger signal to the power side via the forward communication frequency sub-channel.

[0042] Step 4: Upon receiving the drive trigger signal, the power-side drive unit executes the gate drive action based on the confirmed drive parameters. During or after the drive action execution within a preset feedback window, it transmits status feedback information back to the control-side unit via the reverse communication frequency sub-channel. Combined with... Figure 4 In the feedback window, the state feedback module can collect transient or steady-state characteristics of the current switching process, such as dv / dt, di / dt, overshoot voltage, etc., and encode them as the state feedback information of the kth round. The state feedback information is then transmitted back to the control side unit via the reverse communication frequency sub-channel.

[0043] Step 5: The control unit receives and parses the state feedback information from the k-th round, using it as input for closed-loop regulation. For example, if the feedback indicates a high turn-off overshoot voltage, the control unit can automatically increase the turn-off resistance value when generating the drive parameter configuration for the (k+1)-th round; if the feedback indicates abnormal temperature or current conditions, the control unit can adjust the drive parameters or enter a preset protection state. Then, starting from time t4, the control unit generates the drive parameter configuration for the next round based on the state feedback information.

[0044] Furthermore, drive parameter configuration, configuration confirmation information, drive actions, and status feedback information are associated in the same round. When configuration confirmation fails, timeout occurs, or status feedback is abnormal, the control unit retains the valid drive parameter configuration from the previous round, transmits the default configuration, or enters a preset protection state. This round-association mechanism ensures clear timing boundaries for drive interaction, reducing the risk of feedback misalignment and abnormal execution.

[0045] Example 3: To more clearly illustrate the advantages of the technical solution of the present invention in practical applications, a detailed description is given below using a silicon carbide MOSFET driving scenario as an example. In this scenario, due to the high switching speed of silicon carbide MOSFETs, high requirements are placed on the dynamic response capability, anti-interference capability, and parameter adjustment accuracy of the driving circuit. Traditional technical solutions typically require configuring an independent isolated power supply, high-speed digital isolator, or fiber optic transceiver for each silicon carbide MOSFET to separately realize energy transmission, PWM signal transmission, driving parameter configuration, and status feedback, resulting in a large number of isolation devices, increased board area, and increased parasitic coupling paths between the primary and secondary sides.

[0046] The isolated active gate drive device provided in this embodiment allows the control-side unit to send parameters such as dynamic gate resistance, drive delay, or drive voltage level optimized for the silicon carbide MOSFET via a forward communication frequency sub-channel. This adjusts the voltage and current change rates during switching, improving voltage overshoot and gate oscillation. The power-side drive unit can transmit the collected estimated junction temperature, drain-source voltage, or drain current of the silicon carbide MOSFET back to the control side via a reverse communication frequency sub-channel, enabling the control side to dynamically adjust the drive parameters for the next round based on the power-side operating conditions. When overheating or overcurrent risks are detected, the system can enter a preset protection mode.

[0047] In the aforementioned active gate driving process of the silicon carbide MOSFET, the single magnetically coupled channel frequency division multiplexing mechanism adopted in this embodiment ensures continuous operation of the power carrier during parameter configuration and status feedback, thereby reducing the risk of local power supply interruption or drop in the power-side drive unit and minimizing the possibility of drive chip reset, sampling data loss, or gate drive voltage abnormalities caused by power supply anomalies. Furthermore, since all energy and signal transmission is integrated into a single magnetically coupled structure, the number of isolation components and interconnection complexity are reduced, and parasitic coupling paths caused by multiple isolation links are minimized, which is beneficial for improving system integration, power density, and electromagnetic compatibility performance.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An isolated active gate driving device that transmits energy and information simultaneously, characterized in that, It includes a control-side unit, a power-side drive unit, and a single magnetic coupling channel connecting the control-side unit and the power-side drive unit; The single magnetic coupling channel is provided with a power supply frequency sub-channel, a forward communication frequency sub-channel, and a reverse communication frequency sub-channel; the power supply frequency sub-channel is used to transmit a power supply carrier; the forward communication frequency sub-channel is used to transmit a forward communication signal, and the reverse communication frequency sub-channel is used to transmit a reverse communication signal; the power supply frequency sub-channel maintains continuous operation while transmitting information in the forward communication frequency sub-channel and the reverse communication frequency sub-channel; The control-side unit is used to generate drive parameter configuration and send the drive parameter configuration to the power-side drive unit through the forward communication frequency sub-channel; the control-side unit is also used to transmit drive trigger signal to the power-side drive unit through the forward communication frequency sub-channel after receiving valid configuration confirmation information, and generate the next round of drive parameter configuration according to the status feedback information returned by the power-side drive unit. The power-side drive unit is used to receive and load the drive parameter configuration, and to transmit configuration confirmation information back through the reverse communication frequency sub-channel; the power-side drive unit is also used to execute drive actions based on the confirmed drive parameter configuration after receiving the drive trigger signal, and to transmit status feedback information back through the reverse communication frequency sub-channel after executing the drive actions.

2. The isolated active gate driving device for simultaneous energy and information transmission according to claim 1, characterized in that, The power supply frequency sub-channel, forward communication frequency sub-channel, and reverse communication frequency sub-channel are located in different frequency bands, and a frequency protection interval is set between adjacent frequency sub-channels. The frequency protection interval is used to suppress frequency band crosstalk between the power supply link, forward communication link, and reverse communication link.

3. The isolated active gate driving device for simultaneous energy and information transmission according to claim 1, characterized in that, The power-side drive unit is configured to trigger a status feedback window according to a preset drive execution process or a preset number of drive cycles, and to transmit status feedback information back through a reverse communication frequency sub-channel within the status feedback window; the status feedback information includes at least one of configuration confirmation status, protection status, or transient characteristic information.

4. The isolated active gate driving device for simultaneous energy and information transmission according to claim 1 or 2, characterized in that, The single magnetic coupling channel includes a magnetic coupling structure, and based on the magnetic coupling structure, a power supply branch, a forward communication branch, and a reverse communication branch are provided; the magnetic coupling structure includes a planar transformer or a wound transformer; the power supply branch is used to convert the received power supply carrier into the local power supply of the power-side drive unit; the forward communication branch and the reverse communication branch include one or more of the following: frequency selection circuit, envelope detection circuit, comparison decision circuit, and digital logic recovery circuit, so as to complete the transmission and recovery of forward and reverse information in the corresponding frequency sub-channel.

5. The isolated active gate driving device for simultaneous energy and information transmission according to claim 1, characterized in that, The control unit is further configured to, when it does not receive a valid configuration confirmation message, receives a configuration failure message, or receives an abnormal status feedback message, not to use the current round's drive parameter configuration for subsequent drive actions, and to perform at least one of the following operations: maintain the valid drive parameter configuration of the previous round, transmit the default configuration, or enter a preset protection state.

6. The isolated active gate driving device for simultaneous energy and information transmission according to claim 1, characterized in that, The drive parameter configuration adopts a fixed-length frame structure, which includes a start symbol field, a target drive object identifier field, a parameter type field, a parameter value field, and a check bit field. The start symbol field is used to identify the start of the data frame, the target drive object identifier field is used to distinguish different power-side branches or different drive channels, the parameter type field is used to distinguish drive parameter types or status query commands, the parameter value field is used to carry configuration values ​​or query parameters, and the check bit field is used to verify the integrity of the transmitted data.

7. The isolated active gate driving device for simultaneous energy and information transmission according to claim 1, characterized in that, The control-side unit includes an interactive state management module, which manages the cycle correspondence between drive parameter configuration, configuration confirmation information, drive trigger transmission, drive action, and state feedback information. The power-side drive unit includes a drive parameter receiving module, a trigger signal recovery module, and a drive execution module. The drive parameter receiving module receives and loads the drive parameter configuration, the trigger signal recovery module recovers the drive trigger signal, and the drive execution module configures the output gate drive voltage according to the loaded and confirmed drive parameters.

8. An isolated active gate driving method for simultaneous energy and information transmission, applied to the isolated active gate driving device according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: The control-side unit generates the drive parameter configuration and, under the condition that the power carrier is running continuously, sends the drive parameter configuration to the power-side drive unit through the forward communication frequency sub-channel of the single magnetic coupling channel. Step 2: The power-side drive unit receives the drive parameter configuration and sends the configuration confirmation information back to the control-side unit via the reverse communication frequency sub-channel. Step 3: After receiving valid configuration confirmation information, the control-side unit transmits a drive trigger signal to the power-side drive unit via the forward communication frequency sub-channel. Step 4: Upon receiving the drive trigger signal, the power-side drive unit executes the drive action based on the confirmed drive parameters, and after executing the drive action, it transmits status feedback information back to the control-side unit via the reverse communication frequency sub-channel. Step 5: The control unit generates the next round of drive parameter configuration based on the status feedback information.

9. The isolated active gate driving method for simultaneous energy and information transmission according to claim 8, characterized in that, The drive parameter configuration, configuration confirmation information, drive action, and status feedback information are associated in the same round. When the configuration confirmation information fails to be confirmed, the confirmation times out, or the status feedback information is abnormal, the control unit maintains the valid drive parameter configuration of the previous round, transmits the default configuration, or enters a preset protection state.

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