Ballast-shared OBC magnetic integrated electronic transformer and control method thereof

Abstract

The invention discloses an OBC magnetic integrated electronic transformer shared by ballasts, and relates to the technical field of automobile charging, the OBC magnetic integrated electronic transformer shared by the ballasts comprises an output module, an OBC rectification inversion module, a magnetic integrated transformer module, a filtering stabilization module and a control and monitoring module, and the magnetic integrated transformer module is integrated in the OBC magnetic integrated electronic transformer shared by the ballasts. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. According to the invention, the algorithm control unit adopts a PID algorithm to realize real-time monitoring and accurate control of the state of the transformer system, control parameters of the electronic transformer are adjusted according to data fed back by a sensor so as to ensure that the control parameters are kept near a set value, and the stability and efficiency of the ballast shared OBC magnetic integrated electronic transformer are improved; meanwhile, the failure rate is reduced, the durability and reliability of the magnetic integrated electronic transformer are remarkably improved, and the requirement for long-term work of the ballast sharing OBC magnetic integrated electronic transformer in various severe environments is met.

Description

Technical Field

[0001] The invention relates to the technical field of automobile charging, and in particular to a ballast-shared OBC magnetic integrated electronic transformer and a control method thereof. Background Art

[0002] The ballast-shared OBC magnetically integrated electronic transformer is an electrical device that combines power electronics technology and the principle of electromagnetic induction. It plays an important role in the charging system of new energy vehicles and is mainly used in the bidirectional charging function and complex power regulation system of new energy vehicles. As a key component of power conversion, the magnetically integrated electronic transformer mainly uses the principle of electromagnetic induction to convert the input AC power into a form of power suitable for charging the vehicle battery.

[0003] The defects of magnetic integrated electronic transformers in the prior art are:

[0004] 1. Patent document US11488763B2 discloses an integrated transformer and electronic equipment. The integrated transformer cannot monitor and accurately control the system status in real time, and cannot automatically adjust the control parameters according to the data fed back by the sensor, which is not conducive to maintaining the stable operation of the system.

[0005] 2. Patent document CN114094818B discloses a DC converter integrated electronic transformer for automobile charging. The integrated electronic transformer cannot monitor and accurately control the system status in real time, and cannot automatically adjust the control parameters according to the data fed back by the sensor, which is not conducive to maintaining the stable operation of the system.

[0006] 3. Patent document CN220509819U discloses an inductive magnetic integrated structure. The large volume of the inductive magnetic integrated structure makes it impossible to achieve more efficient energy transfer. The response speed and efficiency of the system are low. The dispersion of magnetic components reduces the power density of the entire system, resulting in a small power output per unit volume.

[0007] 4. Patent document CN116779311B discloses an electronic transformer with high magnetic permeability and leakage protection. The large size of the electronic transformer makes it impossible to achieve more efficient energy transfer. The response speed and efficiency of the system are low. The dispersion of magnetic components reduces the power density of the entire system, resulting in a small power output per unit volume. Summary of the invention

[0008] The object of the present invention is to provide a ballast-shared OBC magnetic integrated electronic transformer and a control method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ballast-shared OBC magnetic integrated electronic transformer, comprising an output module, an OBC rectifier-inverter module, a magnetic integrated transformer module, a filter stabilization module and a control and monitoring module, wherein the ballast-shared OBC magnetic integrated electronic transformer has a magnetic integrated transformer module integrated therein, the magnetic integrated transformer module is electrically connected to the output module, the rectifier-inverter module, the filter stabilization module and the control and monitoring module, and the magnetic integrated transformer module realizes voltage and current conversion of high-frequency alternating current, and optimizes energy transfer and power density;

[0010] The control and monitoring module is used to monitor the operating status of the ballast common OBC magnetic integrated electronic transformer in real time, and adjust and optimize the operating status of the system according to the monitoring results. The control and monitoring module consists of a sensor monitoring unit, a circuit protection unit and an algorithm control unit.

[0011] Preferably, the output module receives the alternating current from the power grid, ensures that the input current is stable and pure, and then inputs the alternating current into the OBC rectifier inverter module.

[0012] Preferably, the OBC rectifier-inverter module comprises an OBC rectifier unit, an inverter unit and a MOSFET unit, the OBC rectifier unit converts the input AC power into DC power, the inverter unit converts the rectified DC power into high-frequency AC power, and the MOSFET unit realizes precise control of the current.

[0013] Preferably, the magnetically integrated transformer module includes multiple groups of windings, a magnetic core, a skeleton and a base plate. The high-frequency alternating current is transmitted through the windings of the magnetically integrated electronic transformer module, and the principle of electromagnetic induction is used to realize the conversion of voltage and current, thereby realizing energy transfer and voltage conversion between multiple windings to support different power flows and working modes.

[0014] Preferably, the filtering and stabilizing module filters and stabilizes the electric energy converted by the magnetic integrated transformer module to ensure the stability and purity of the output voltage and current. The filtering and stabilizing components include multiple groups of capacitors, inductors, and filtering units. The capacitors are used to store electric energy and stabilize the voltage, and the inductors are used to limit the current change rate. The capacitors, inductors, and windings realize the conversion and transmission of electric energy. The filtering and stabilizing module accurately adjusts the voltage and current and outputs them to the battery pack of the new energy vehicle.

[0015] Preferably, the control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The sensor monitoring unit includes a current sensor, a voltage sensor, a temperature sensor and a vibration sensor. The current sensor is used to monitor the current change in the electronic transformer to ensure that the current operates within a safe and efficient range. The voltage sensor is used to monitor the input and output voltages in real time to ensure voltage stability and detect voltage fluctuations and abnormal conditions. The temperature sensor is used to monitor the temperature changes of the output module, the OBC rectifier inverter module, the magnetic integrated transformer module and the filter stabilization module. The vibration sensor is used to monitor the mechanical stability and looseness of the OBC magnetic integrated electronic transformer shared by the ballast. The current sensor and the voltage sensor respectively transmit the monitoring data to the algorithm control unit.

[0016] Preferably, the circuit protection unit is used to automatically cut off the power supply and take other protective measures to protect the system from damage when an abnormal situation is detected.

[0017] Preferably, the algorithm control unit adopts PID algorithm.

[0018] The PID algorithm formula is as follows:

[0019]

[0020] Where, u(t) is the set value of the adjusted voltage or current;

[0021] e(t) is the error signal, i.e., the difference between the set value and the actual sensor measurement value;

[0022] K p is the proportional gain, which determines the degree of direct influence of the error signal on the control output;

[0023] K i is the integral gain, which accumulates past errors by integrating the error signal and helps to eliminate steady-state errors;

[0024] K d is the derivative gain, which predicts the future trend of the error signal and adjusts the control output in advance to speed up the response and reduce overshoot;

[0025] The output u(t) of the algorithm control unit is used as an adjustment signal and input into the output module of the ballast common OBC magnetic integrated electronic transformer to adjust its control parameters.

[0026] A control method for a ballast-shared OBC magnetic integrated electronic transformer is applicable to a ballast-shared OBC magnetic integrated electronic transformer. Preferably, the control method for the electronic transformer comprises the following steps:

[0027] Step S1, the output module receives the AC power from the power grid and inputs the AC power into the OBC rectifier-inverter module, the OBC rectifier-inverter module converts the input AC power into DC power, and the inverter unit converts the rectified DC power into high-frequency AC power;

[0028] Step S2, the magnetic integrated transformer module realizes the voltage and current conversion of the high-frequency alternating current, and the filtering and stabilizing module filters and stabilizes the electric energy converted by the magnetic integrated transformer module and then outputs it to the battery pack of the new energy vehicle;

[0029] Step S3: During the operation of the ballast-shared OBC magnetically integrated electronic transformer, the control and monitoring module transmits the monitoring data of the current sensor and the voltage sensor to the algorithm control unit. The algorithm control unit compares the set value with the actual measured value to obtain the error signal e(t). The algorithm control unit inputs the output u(t) as an adjustment signal to the output module of the ballast-shared OBC magnetically integrated electronic transformer to adjust its control parameters.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention realizes real-time monitoring and precise control of the transformer system state by adopting PID algorithm through the algorithm control unit, adjusts the control parameters of the electronic transformer according to the data fed back by the sensor to ensure that they remain near the set values, observes the response of the electronic transformer, and collects data again through the sensor to evaluate the stability and control effect of the system, and continuously monitors the system to maintain stable operation of the system, thereby improving the stability and efficiency of the ballast-shared OBC magnetically integrated electronic transformer, while reducing the failure rate, significantly improving the durability and reliability of the magnetically integrated electronic transformer, and meeting the long-term working requirements of the ballast-shared OBC magnetically integrated electronic transformer in various harsh environments.

[0032] 2. The present invention integrates magnetic components with different functions, such as OBC rectifier inverter module, magnetic integrated transformer module and filter stabilization module, through magnetic integration technology, so as to achieve more efficient energy transfer and smaller volume, and further improve the response speed and efficiency of the system. The magnetic integration technology improves the power density of the whole system by optimizing the layout and coupling mode of the magnetic components, so that the power output per unit volume is larger. The integrated magnetic components reduce the connection ends and the length of the magnetic path, thus reducing the magnetic loss and copper loss, thereby improving the overall efficiency of the system. The magnetic integrated transformer integrates the transformer and the resonant inductor into one, which can effectively reduce the dispersion of the magnetic components and meet the production needs of miniaturization, integration and high power density of on-board electronic equipment in the new energy vehicle industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a schematic diagram of the working process of the electronic transformer of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the control and monitoring module of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection or a movable connection, or a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Embodiment 1, an embodiment provided by the present invention: a ballast common OBC magnetic integrated electronic transformer, comprising an output module, an OBC rectifier inverter module, a magnetic integrated transformer module, a filter stabilization module and a control and monitoring module, the ballast common OBC magnetic integrated electronic transformer internally integrates a magnetic integrated transformer module, and the magnetic integrated transformer module is electrically connected to the output module, the rectifier inverter module, the filter stabilization module and the control and monitoring module;

[0039] The output module receives the AC power from the power grid, ensures the input current is stable and pure, and then inputs the AC power into the OBC rectifier inverter module;

[0040] The OBC rectifier-inverter module includes an OBC rectifier unit, an inverter unit, and a MOSFET unit. The OBC rectifier unit converts the input AC power into DC power, the inverter unit converts the rectified DC power into high-frequency AC power, and the MOSFET unit realizes precise control of the current.

[0041] The magnetic integrated transformer module realizes the voltage and current conversion of high-frequency alternating current and optimizes energy transfer and power density. The magnetic integrated transformer module includes multiple sets of windings, magnetic cores, skeletons and bottom plates. High-frequency alternating current is transmitted through the windings of the magnetic integrated electronic transformer module, and the voltage and current conversion is realized by using the principle of electromagnetic induction, realizing energy transfer and voltage conversion between multiple windings to support different power flows and working modes.

[0042] The filter stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module to ensure the stability and purity of the output voltage and current. The filter stabilization components include multiple groups of capacitors, inductors, and filter units. The capacitors are used to store electric energy and stabilize the voltage, and the inductors are used to limit the current change rate. The capacitors, inductors, and windings realize the conversion and transmission of electric energy. The filter stabilization module accurately adjusts the voltage and current and outputs them to the battery pack of the new energy vehicle.

[0043] The control and monitoring module is used to monitor the operating status of the OBC magnetic integrated electronic transformer shared by the ballast in real time. The control and monitoring module consists of a sensor monitoring unit and a circuit protection unit. The control and monitoring module consists of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The sensor monitoring unit includes a current sensor, a voltage sensor, a temperature sensor and a vibration sensor. The current sensor is used to monitor the current change in the electronic transformer to ensure that the current operates within a safe and efficient range. The voltage sensor is used to monitor the input and output voltages in real time to ensure voltage stability and detect voltage fluctuations and abnormal conditions. The temperature sensor is used to monitor the temperature changes of the output module, OBC rectifier inverter module, magnetic integrated transformer module and filter stabilization module. The vibration sensor is used to monitor the mechanical stability and looseness of the OBC magnetic integrated electronic transformer shared by the ballast. The current sensor, voltage sensor, temperature sensor and vibration sensor transmit the monitoring data to the circuit protection unit respectively. The circuit protection unit is used to automatically cut off the power supply when an abnormal condition is detected and take other protective measures to protect the system from damage.

[0044] The control method of the electronic transformer comprises the following steps:

[0045] Step S1, the output module receives the AC power from the power grid and inputs the AC power into the OBC rectifier inverter module, the OBC rectifier inverter module converts the input AC power into DC power, and the inverter unit converts the rectified DC power into high-frequency AC power; Step S2, the magnetic integrated transformer module realizes the voltage and current conversion of the high-frequency AC power, the filtering and stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module and outputs it to the battery pack of the new energy vehicle; Step S3, the control and monitoring module of the ballast shared OBC magnetic integrated electronic transformer transmits the monitoring data to the circuit protection unit during operation, and the circuit protection unit is used to automatically cut off the power supply when an abnormal situation is detected and take other protection measures to protect the system from damage.

[0046] Embodiment 2, an embodiment provided by the present invention: a ballast-shared OBC magnetic integrated electronic transformer, comprising an output module, an OBC rectifier-inverter module, a magnetic integrated transformer module, a filter stabilization module and a control and monitoring module, the ballast-shared OBC magnetic integrated electronic transformer internally integrates a magnetic integrated transformer module, and the magnetic integrated transformer module is electrically connected to the output module, the rectifier-inverter module, the filter stabilization module and the control and monitoring module;

[0047] The output module receives the AC power from the power grid, ensures the input current is stable and pure, and then inputs the AC power into the OBC rectifier inverter module;

[0048] The OBC rectifier-inverter module includes an OBC rectifier unit, an inverter unit, and a MOSFET unit. The OBC rectifier unit converts the input AC power into DC power, the inverter unit converts the rectified DC power into high-frequency AC power, and the MOSFET unit realizes precise control of the current.

[0049] The magnetic integrated transformer module realizes the voltage and current conversion of high-frequency alternating current and optimizes energy transfer and power density. The magnetic integrated transformer module includes multiple sets of windings, magnetic cores, skeletons and bottom plates. High-frequency alternating current is transmitted through the windings of the magnetic integrated electronic transformer module, and the voltage and current conversion is realized by using the principle of electromagnetic induction, realizing energy transfer and voltage conversion between multiple windings to support different power flows and working modes.

[0050] The filter stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module to ensure the stability and purity of the output voltage and current. The filter stabilization components include multiple groups of capacitors, inductors, and filter units. The capacitors are used to store electric energy and stabilize the voltage, and the inductors are used to limit the current change rate. The capacitors, inductors, and windings realize the conversion and transmission of electric energy. The filter stabilization module accurately adjusts the voltage and current and outputs them to the battery pack of the new energy vehicle.

[0051] The control and monitoring module is used to monitor the operating status of the OBC magnetic integrated electronic transformer shared by the ballast in real time, and adjust and optimize the operating status of the system according to the monitoring results. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The sensor monitoring unit includes a current sensor, a voltage sensor, a temperature sensor and a vibration sensor. The current sensor is used to monitor the current change in the electronic transformer to ensure that the current operates within a safe and efficient range. The voltage sensor is used to monitor the input and output voltages in real time to ensure voltage stability and detect voltage fluctuations and abnormal conditions. The temperature sensor is used to monitor the temperature changes of the output module, OBC rectifier inverter module, magnetic integrated transformer module and filter stabilization module. The vibration sensor is used to monitor the mechanical stability and looseness of the OBC magnetic integrated electronic transformer shared by the ballast. The current sensor and voltage sensor transmit the monitoring data to the algorithm control unit respectively. The circuit protection unit is used to automatically cut off the power supply when an abnormal situation is detected and take other protective measures to protect the system from damage.

[0052] The algorithm control unit adopts PID algorithm.

[0053] The PID algorithm formula is as follows:

[0054]

[0055] Where, u(t) is the set value of the adjusted voltage;

[0056] e(t) is the error signal, i.e., the difference between the set value and the actual sensor measurement value;

[0057] K p is the proportional gain, which determines the degree of direct influence of the error signal on the control output;

[0058] K i is the integral gain, which accumulates past errors by integrating the error signal and helps to eliminate steady-state errors;

[0059] K d is the derivative gain, which predicts the future trend of the error signal and adjusts the control output in advance to speed up the response and reduce overshoot;

[0060] The output u(t) of the algorithm control unit is used as an adjustment signal and input into the output module of the ballast common OBC magnetic integrated electronic transformer to adjust the voltage parameters.

[0061] The control method of the electronic transformer comprises the following steps:

[0062] Step S1, the output module receives the AC power from the power grid and inputs the AC power into the OBC rectifier inverter module, the OBC rectifier inverter module converts the input AC power into DC power, and the inverter unit converts the rectified DC power into high-frequency AC power; Step S2, the magnetic integrated transformer module realizes the voltage and current conversion of the high-frequency AC power, the filtering and stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module and outputs it to the battery pack of the new energy vehicle; Step S3, during the operation of the ballast-shared OBC magnetic integrated electronic transformer, the control and monitoring module transmits the voltage sensor monitoring data to the algorithm control unit, the algorithm control unit compares the set value with the actual measured value to obtain the error signal e(t), and the algorithm control unit outputs u(t) as an adjustment signal and inputs it into the output module of the ballast-shared OBC magnetic integrated electronic transformer to adjust the voltage parameters.

[0063] Embodiment 3, an embodiment provided by the present invention: a ballast-shared OBC magnetic integrated electronic transformer, comprising an output module, an OBC rectifier-inverter module, a magnetic integrated transformer module, a filter stabilization module and a control and monitoring module, the ballast-shared OBC magnetic integrated electronic transformer internally integrates a magnetic integrated transformer module, and the magnetic integrated transformer module is electrically connected to the output module, the rectifier-inverter module, the filter stabilization module and the control and monitoring module;

[0064] The output module receives the AC power from the power grid, ensures the input current is stable and pure, and then inputs the AC power into the OBC rectifier inverter module;

[0065] The OBC rectifier-inverter module includes an OBC rectifier unit, an inverter unit, and a MOSFET unit. The OBC rectifier unit converts the input AC power into DC power, the inverter unit converts the rectified DC power into high-frequency AC power, and the MOSFET unit realizes precise control of the current.

[0066] The magnetic integrated transformer module realizes the voltage and current conversion of high-frequency alternating current and optimizes energy transfer and power density. The magnetic integrated transformer module includes multiple sets of windings, magnetic cores, skeletons and bottom plates. High-frequency alternating current is transmitted through the windings of the magnetic integrated electronic transformer module, and the voltage and current conversion is realized by using the principle of electromagnetic induction, realizing energy transfer and voltage conversion between multiple windings to support different power flows and working modes.

[0067] The filter stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module to ensure the stability and purity of the output voltage and current. The filter stabilization components include multiple groups of capacitors, inductors, and filter units. The capacitors are used to store electric energy and stabilize the voltage, and the inductors are used to limit the current change rate. The capacitors, inductors, and windings realize the conversion and transmission of electric energy. The filter stabilization module accurately adjusts the voltage and current and outputs them to the battery pack of the new energy vehicle.

[0068] The control and monitoring module is used to monitor the operating status of the OBC magnetic integrated electronic transformer shared by the ballast in real time, and adjust and optimize the operating status of the system according to the monitoring results. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The sensor monitoring unit includes a current sensor, a voltage sensor, a temperature sensor and a vibration sensor. The current sensor is used to monitor the current change in the electronic transformer to ensure that the current operates within a safe and efficient range. The voltage sensor is used to monitor the input and output voltages in real time to ensure voltage stability and detect voltage fluctuations and abnormal conditions. The temperature sensor is used to monitor the temperature changes of the output module, OBC rectifier inverter module, magnetic integrated transformer module and filter stabilization module. The vibration sensor is used to monitor the mechanical stability and looseness of the OBC magnetic integrated electronic transformer shared by the ballast. The current sensor and voltage sensor transmit the monitoring data to the algorithm control unit respectively. The circuit protection unit is used to automatically cut off the power supply when an abnormal situation is detected and take other protective measures to protect the system from damage.

[0069] The algorithm control unit adopts PID algorithm.

[0070] The PID algorithm formula is as follows:

[0071]

[0072] Among them, u(t) is the set value of the adjusted current;

[0073] e(t) is the error signal, i.e., the difference between the set value and the actual sensor measurement value;

[0074] K p is the proportional gain, which determines the degree of direct influence of the error signal on the control output;

[0075] K i is the integral gain, which accumulates past errors by integrating the error signal and helps to eliminate steady-state errors;

[0076] K d is the derivative gain, which predicts the future trend of the error signal and adjusts the control output in advance to speed up the response and reduce overshoot;

[0077] The output u(t) of the algorithm control unit is used as an adjustment signal and input into the output module of the ballast common OBC magnetic integrated electronic transformer to adjust the current parameters.

[0078] The control method of the electronic transformer comprises the following steps:

[0079] Step S1, the output module receives the AC power from the power grid and inputs the AC power into the OBC rectifier inverter module, the OBC rectifier inverter module converts the input AC power into DC power, and the inverter unit converts the rectified DC power into high-frequency AC power; Step S2, the magnetic integrated transformer module realizes the voltage and current conversion of the high-frequency AC power, the filtering and stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module and outputs it to the battery pack of the new energy vehicle; Step S3, during the operation of the ballast-shared OBC magnetic integrated electronic transformer, the control and monitoring module transmits the monitoring data of the current sensor and the voltage sensor to the algorithm control unit, the algorithm control unit compares the set value with the actual measured value to obtain the error signal e(t), and the algorithm control unit outputs u(t) as an adjustment signal and inputs it into the output module of the ballast-shared OBC magnetic integrated electronic transformer to adjust the current parameters.

[0080] Embodiment 4, an embodiment provided by the present invention: a ballast-shared OBC magnetic integrated electronic transformer, comprising an output module, an OBC rectifier-inverter module, a magnetic integrated transformer module, a filter stabilization module and a control and monitoring module, the ballast-shared OBC magnetic integrated electronic transformer internally integrates a magnetic integrated transformer module, and the magnetic integrated transformer module is electrically connected to the output module, the rectifier-inverter module, the filter stabilization module and the control and monitoring module;

[0081] The output module receives the AC power from the power grid, ensures the input current is stable and pure, and then inputs the AC power into the OBC rectifier inverter module;

[0082] The OBC rectifier-inverter module includes an OBC rectifier unit, an inverter unit, and a MOSFET unit. The OBC rectifier unit converts the input AC power into DC power, the inverter unit converts the rectified DC power into high-frequency AC power, and the MOSFET unit realizes precise control of the current.

[0083] The magnetic integrated transformer module realizes the voltage and current conversion of high-frequency alternating current and optimizes energy transfer and power density. The magnetic integrated transformer module includes multiple sets of windings, magnetic cores, skeletons and bottom plates. High-frequency alternating current is transmitted through the windings of the magnetic integrated electronic transformer module, and the voltage and current conversion is realized by using the principle of electromagnetic induction, realizing energy transfer and voltage conversion between multiple windings to support different power flows and working modes.

[0084] The filter stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module to ensure the stability and purity of the output voltage and current. The filter stabilization components include multiple groups of capacitors, inductors, and filter units. The capacitors are used to store electric energy and stabilize the voltage, and the inductors are used to limit the current change rate. The capacitors, inductors, and windings realize the conversion and transmission of electric energy. The filter stabilization module accurately adjusts the voltage and current and outputs them to the battery pack of the new energy vehicle.

[0085] The control and monitoring module is used to monitor the operating status of the OBC magnetic integrated electronic transformer shared by the ballast in real time, and adjust and optimize the operating status of the system according to the monitoring results. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The sensor monitoring unit includes a current sensor, a voltage sensor, a temperature sensor and a vibration sensor. The current sensor is used to monitor the current change in the electronic transformer to ensure that the current operates within a safe and efficient range. The voltage sensor is used to monitor the input and output voltages in real time to ensure voltage stability and detect voltage fluctuations and abnormal conditions. The temperature sensor is used to monitor the temperature changes of the output module, OBC rectifier inverter module, magnetic integrated transformer module and filter stabilization module. The vibration sensor is used to monitor the mechanical stability and looseness of the OBC magnetic integrated electronic transformer shared by the ballast. The current sensor and voltage sensor transmit the monitoring data to the algorithm control unit respectively. The circuit protection unit is used to automatically cut off the power supply when an abnormal situation is detected and take other protective measures to protect the system from damage.

[0086] The algorithm control unit adopts PID algorithm.

[0087] The PID algorithm formula is as follows:

[0088]

[0089] Where, u(t) is the set value of the adjusted voltage or current;

[0090] e(t) is the error signal, i.e., the difference between the set value and the actual sensor measurement value;

[0091] K p is the proportional gain, which determines the degree of direct influence of the error signal on the control output;

[0092] K i is the integral gain, which accumulates past errors by integrating the error signal and helps to eliminate steady-state errors;

[0093] K d is the derivative gain, which predicts the future trend of the error signal and adjusts the control output in advance to speed up the response and reduce overshoot;

[0094] The output u(t) of the algorithm control unit is used as an adjustment signal and input into the output module of the ballast common OBC magnetic integrated electronic transformer to adjust its control parameters;

[0095] Observe the response of the electronic transformer and collect data again through the sensor to evaluate the stability and control effect of the system. If the system reaches a stable state, the ballast shared OBC magnetic integrated electronic transformer operates normally. If the system does not reach a stable state or the control effect is not ideal, recalculate the output of the algorithm control unit according to the new error signal, and continue to adjust the control parameters until the system reaches a stable state.

[0096] The control method of the electronic transformer comprises the following steps:

[0097] Step S1, the output module receives the AC power from the power grid and inputs the AC power into the OBC rectifier inverter module, the OBC rectifier inverter module converts the input AC power into DC power, and the inverter unit converts the rectified DC power into high-frequency AC power; Step S2, the magnetic integrated transformer module realizes the voltage and current conversion of the high-frequency AC power, the filtering and stabilization module filters and stabilizes the electric energy converted by the magnetic integrated transformer module and outputs it to the battery pack of the new energy vehicle; Step S3, during the operation of the ballast-shared OBC magnetic integrated electronic transformer, the control and monitoring module transmits the monitoring data of the current sensor and the voltage sensor to the algorithm control unit, the algorithm control unit compares the set value with the actual measured value to obtain the error signal e(t), and the algorithm control unit outputs u(t) as an adjustment signal and inputs it into the output module of the ballast-shared OBC magnetic integrated electronic transformer to adjust its control parameters, observe the response of the electronic transformer, and collect data again through the sensor to evaluate the stability and control effect of the system.

[0098] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A ballast common OBC magnetic integrated electronic transformer, characterized in that: It includes an output module, an OBC rectifier inverter module, a magnetic integrated transformer module, a filter stabilization module and a control and monitoring module. The ballast shares an OBC magnetic integrated electronic transformer with a magnetic integrated transformer module integrated inside. The magnetic integrated transformer module is electrically connected to the output module, the rectifier inverter module, the filter stabilization module and the control and monitoring module. The magnetic integrated transformer module realizes voltage and current conversion of high-frequency alternating current and optimizes energy transfer and power density. The control and monitoring module is used to monitor the operating status of the ballast common OBC magnetic integrated electronic transformer in real time, and adjust and optimize the operating status of the system according to the monitoring results. The control and monitoring module consists of a sensor monitoring unit, a circuit protection unit and an algorithm control unit.

2. The ballast-shared OBC magnetic integrated electronic transformer according to claim 1, characterized in that: The output module receives the AC power from the power grid, ensures that the input current is stable and pure, and then inputs the AC power into the OBC rectifier inverter module.

3. The ballast-shared OBC magnetic integrated electronic transformer according to claim 2, characterized in that: The OBC rectifier inverter module includes an OBC rectifier unit, an inverter unit and a MOSFET unit. The OBC rectifier unit converts the input AC power into DC power, the inverter unit converts the rectified DC power into high-frequency AC power, and the MOSFET unit realizes precise control of the current.

4. The ballast-shared OBC magnetic integrated electronic transformer according to claim 3, characterized in that: The magnetic integrated transformer module includes multiple groups of windings, a magnetic core, a skeleton and a base plate. The high-frequency alternating current is transmitted through the windings of the magnetic integrated electronic transformer module, and the principle of electromagnetic induction is used to realize the conversion of voltage and current, thereby realizing energy transfer and voltage conversion between multiple windings to support different power flows and working modes.

5. The ballast-shared OBC magnetic integrated electronic transformer according to claim 4, characterized in that: The filtering and stabilizing module filters and stabilizes the electric energy converted by the magnetic integrated transformer module to ensure the stability and purity of the output voltage and current. The filtering and stabilizing components include multiple groups of capacitors, inductors, and filtering units. The capacitors are used to store electric energy and stabilize the voltage. The inductors are used to limit the current change rate. The capacitors, inductors, and windings realize the conversion and transmission of electric energy. The filtering and stabilizing module accurately adjusts the voltage and current and outputs them to the battery pack of the new energy vehicle.

6. The ballast-shared OBC magnetic integrated electronic transformer according to claim 5, characterized in that: The control and monitoring module is composed of a sensor monitoring unit, a circuit protection unit and an algorithm control unit. The sensor monitoring unit includes a current sensor, a voltage sensor, a temperature sensor and a vibration sensor. The current sensor is used to monitor the current change in the electronic transformer to ensure that the current operates within a safe and efficient range. The voltage sensor is used to monitor the input and output voltages in real time to ensure voltage stability and detect voltage fluctuations and abnormal conditions. The temperature sensor is used to monitor the temperature changes of the output module, the OBC rectifier inverter module, the magnetic integrated transformer module and the filter stabilization module. The vibration sensor is used to monitor the mechanical stability and looseness of the OBC magnetic integrated electronic transformer shared by the ballast. The current sensor and the voltage sensor transmit the monitoring data to the algorithm control unit respectively.

7. The ballast-shared OBC magnetic integrated electronic transformer according to claim 6, characterized in that: The circuit protection unit is used to automatically cut off the power supply and take other protective measures to protect the system from damage when an abnormal situation is detected.

8. The ballast-shared OBC magnetic integrated electronic transformer according to claim 6, characterized in that: The algorithm control unit adopts PID algorithm. The PID algorithm formula is as follows: Where, u(t) is the set value of the adjusted voltage or current; e(t) is the error signal, i.e., the difference between the set value and the actual sensor measurement value; K p is the proportional gain, which determines the degree of direct influence of the error signal on the control output; K i is the integral gain, which accumulates past errors by integrating the error signal and helps to eliminate steady-state errors; K d is the derivative gain, which predicts the future trend of the error signal and adjusts the control output in advance to speed up the response and reduce overshoot; The output u(t) of the algorithm control unit is used as an adjustment signal and input into the output module of the ballast common OBC magnetic integrated electronic transformer to adjust its control parameters.

9. A control method for a ballast-shared OBC magnetic integrated electronic transformer, applicable to a ballast-shared OBC magnetic integrated electronic transformer as claimed in any one of claims 1 to 8, characterized in that: The control method of the electronic transformer comprises the following steps: Step S1, the output module receives the AC power from the power grid and inputs the AC power into the OBC rectifier-inverter module, the OBC rectifier-inverter module converts the input AC power into DC power, and the inverter unit converts the rectified DC power into high-frequency AC power; Step S2, the magnetic integrated transformer module realizes the voltage and current conversion of the high-frequency alternating current, and the filtering and stabilizing module filters and stabilizes the electric energy converted by the magnetic integrated transformer module and then outputs it to the battery pack of the new energy vehicle; Step S3: During the operation of the ballast-shared OBC magnetically integrated electronic transformer, the control and monitoring module transmits the monitoring data of the current sensor and the voltage sensor to the algorithm control unit. The algorithm control unit compares the set value with the actual measured value to obtain the error signal e(t). The algorithm control unit inputs the output u(t) as an adjustment signal to the output module of the ballast-shared OBC magnetically integrated electronic transformer to adjust its control parameters.

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