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CN-122026835-A - Intelligent digital power amplifier system and device for new energy automobile

CN122026835ACN 122026835 ACN122026835 ACN 122026835ACN-122026835-A

Abstract

The invention relates to the technical field of new energy automobile electronics, in particular to an intelligent digital power amplifier system and device for a new energy automobile. The intelligent power management module calculates a voltage stabilizing correction coefficient regulation circuit parameter, the power amplification intelligent protection module calculates a time sequence duty ratio regulation factor based on the voltage stabilizing correction coefficient and electromagnetic interference intensity to adjust a power amplification time sequence, the audio intelligent processing module calculates a weight coefficient based on the regulation factor to optimize a filtering and gain parameter, and the vehicle-computer cooperative control module realizes parameter linkage transmission and OTA upgrading. According to the invention, the module parameters are linked in a progressive way, the vehicle-mounted complex working condition is adapted, and the stable work of the power amplifier is ensured.

Inventors

  • LI DECONG
  • HUANG GUITIAN

Assignees

  • 佛山市南海区今旋子电器有限公司

Dates

Publication Date
20260512
Application Date
20260128

Claims (10)

  1. 1. The intelligent digital power amplification system of the new energy automobile comprises an intelligent power management module, an audio intelligent processing module, a power amplification intelligent protection module and an automobile cooperative control module, and is characterized in that the intelligent power management module is provided with an impedance monitoring unit, a PFC voltage stabilizing circuit and a DC-DC synchronous rectification circuit, the impedance monitoring unit collects power amplification load impedance, the intelligent power management module calculates a voltage stabilizing correction coefficient based on the power amplification load impedance and input power supply parameters, the voltage stabilizing correction coefficient is used for regulating and controlling working parameters of the PFC voltage stabilizing circuit and the DC-DC synchronous rectification circuit, the power amplification intelligent protection module is provided with an electromagnetic interference sensor and a time sequence control unit, the electromagnetic interference sensor collects electromagnetic interference intensity of a motor, the time sequence control unit calculates a time sequence duty ratio regulating factor based on the voltage stabilizing correction coefficient and the electromagnetic interference intensity of the motor, the time sequence duty ratio regulating factor is used for adjusting working time sequence of the power amplification, the audio intelligent processing module is internally provided with a filter and an LMS self-adaptive algorithm unit, the LMS self-adaptive algorithm unit calculates an interference characteristic optimization weight coefficient based on the time sequence duty ratio regulating factor, the interference characteristic optimization weight coefficient is used for regulating and controlling the power factor, and the power amplification characteristic optimization parameter is used for adjusting the power amplification parameter, the power amplification parameter is used for achieving the adjustment, the power amplification parameter is coordinated with the time sequence control system, and the power amplification parameter is used for achieving the power amplification, and the power amplification parameter is adjusted, and the power control parameter is used for achieving the performance optimization.
  2. 2. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the impedance monitoring unit of the intelligent power management module comprises a high-frequency sampling circuit and an impedance calculating subunit, the high-frequency sampling circuit collects voltage signals and current signals of an output end of the power amplifier, the impedance calculating subunit generates successful load impedance based on the voltage signals and the current signals, the PFC voltage stabilizing circuit and the DC-DC synchronous rectifying circuit adopt closed-loop control logic, receive voltage stabilizing correction coefficients, adjust circuit working parameters and regulate output voltage ripples.
  3. 3. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the intelligent power amplification protection module is further configured with a multi-dimensional monitoring unit, the multi-dimensional monitoring unit comprises an output voltage monitoring unit, an output current monitoring unit and a device temperature monitoring unit, the time sequence control unit comprises a time sequence generation subunit and a regulation subunit, the time sequence generation subunit outputs a basic work time sequence of the power amplification, the regulation subunit corrects the basic work time sequence based on a time sequence duty ratio regulation factor, regulates the proportion of the power amplification on time to the work period, and performs power reduction or mute operation when abnormal conditions are detected.
  4. 4. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the filter of the audio intelligent processing module comprises a high-pass filter circuit, a low-pass filter circuit and a band-stop filter circuit, the LMS self-adaptive algorithm unit comprises a signal separation sub-unit and a weight adjustment sub-unit, the signal separation sub-unit separates effective audio signals from interference signals, and the weight adjustment sub-unit adjusts the filtering weight and gain adjustment amplitude of each filter based on the interference feature coding optimization weight coefficient.
  5. 5. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the intelligent power management module calculates a voltage stabilizing correction coefficient by adopting a load impedance coupling type voltage stabilizing correction formula, the formula is designed based on an impedance matching theory and a closed loop voltage stabilizing principle, and a voltage stabilizing correction logic is constructed by combining a coupling relation of a power amplifier load impedance and a rated load impedance, a duty ratio of a PFC circuit and a DC-DC circuit and a ratio of input voltage fluctuation and rated input voltage, so that circuit parameter accurate regulation and control under wide voltage input are realized.
  6. 6. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the intelligent power amplification protection module calculates a time sequence duty ratio regulating factor by adopting an interference coupling time sequence regulating and controlling formula, the formula is designed based on a time sequence control theory and an electromagnetic interference coupling principle, is based on a voltage stabilizing correction coefficient, combines the square of the ratio of the power amplification on time to the working period, integrates a coupling item of the electromagnetic interference intensity correction coefficient and the relative strength of electromagnetic interference of a motor, constructs a time sequence regulating and controlling logic, and realizes the dynamic regulation of the power amplification time sequence under interference adaptation.
  7. 7. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the audio intelligent processing module calculates an interference feature coding optimization weight coefficient by adopting a time sequence linkage interference coding optimization formula, the formula is designed based on a self-adaptive filtering theory and a signal feature extraction principle, takes a time sequence duty ratio regulating factor as a core, combines the product of an LMS algorithm basic convergence coefficient and an audio dynamic gain coefficient, divides the audio signal distortion degree, and then blends a difference item of an effective audio signal component ratio and a total input signal component ratio, and constructs a weight optimization logic to realize the noise reduction and gain cooperative regulation under time sequence linkage.
  8. 8. The intelligent digital power amplification system of the new energy automobile according to claim 1, wherein the automobile machine cooperative control module comprises a data transmission unit and an OTA upgrading unit, the data transmission unit adopts a dual-mode communication link to establish a data interaction link with an APP and each module, transmits a voltage stabilizing correction coefficient, a time sequence duty cycle regulation factor and an interference characteristic coding optimization weight coefficient, the OTA upgrading unit comprises an upgrading packet verification subunit and a parameter synchronization subunit, receives an upgrading packet issued by the APP and completes verification upgrading, synchronously updates algorithm parameters and control logic of each module, and adapts to external power amplification control protocols of different brands.
  9. 9. The intelligent digital power amplification device for the new energy automobile is applied to the intelligent digital power amplification system for the new energy automobile, and comprises a shell, a circuit board, a power interface, an audio input interface, an audio output interface and an external power amplification connection interface, wherein the circuit board integrates an intelligent power management module, an audio intelligent processing module, an power amplification intelligent protection module and a vehicle-computer cooperative control module of the intelligent digital power amplification system for the new energy automobile, which are disclosed in any one of claims 1 to 8, the power interface is electrically connected with the intelligent power management module, is connected with a vehicle-mounted power supply of the new energy automobile in an accessing mode and transmits power supply voltage, the audio input interface is electrically connected with the audio intelligent processing module and is used for receiving audio signals output by a vehicle-mounted host, the audio output interface is electrically connected with the audio intelligent processing module and the power amplification output end and is used for outputting the processed audio signals, the external power amplification connection interface is electrically connected with the vehicle-computer cooperative control module and is used for realizing physical connection and signal transmission with external power amplifiers of different brands, the shell is made of electromagnetic shielding materials, and is provided with mounting holes corresponding to the interfaces.
  10. 10. The intelligent digital power amplification device of the new energy automobile is characterized in that the circuit board is further integrated with a temperature heat dissipation control unit and a fault alarm unit, the temperature heat dissipation control unit is electrically connected with the intelligent power amplification protection module, receives device temperature data collected by the intelligent power amplification protection module and adjusts the rotating speed of a cooling fan, the fault alarm unit is electrically connected with the intelligent power amplification protection module and the cooperative control module of the automobile, when the intelligent power amplification protection module monitors abnormality and performs power reduction or mute operation, fault signals are generated and transmitted to an APP (application) of the android system through the cooperative control module of the automobile, a prompt is sent through a built-in alarm indicator lamp, a reverse connection prevention circuit and an overvoltage protection circuit are built in a power interface, and damage to the device caused by abnormal access of an automobile power supply is avoided.

Description

Intelligent digital power amplifier system and device for new energy automobile Technical Field The invention relates to the technical field of new energy automobile electronics, in particular to an intelligent digital power amplifier system and device for a new energy automobile. Background Under the complex working condition of the vehicle, the existing digital power amplifier system of the new energy automobile has the problem of insufficient voltage stabilizing precision caused by coupling of power supply fluctuation and dynamic change of load impedance. The vehicle-mounted power supply of the new energy automobile is affected by working conditions such as start-stop and acceleration, the fluctuation range of input voltage is large, the load impedance of the power amplifier can dynamically change along with an audio signal, the power management module of the conventional power amplifier system only independently regulates and controls the power supply voltage, and the load impedance change and the power supply fluctuation are not coupled and controlled, so that the voltage ripple is increased, and the output stability of the power amplifier is affected. Meanwhile, strong electromagnetic interference generated by the vehicle-mounted motor can interfere power amplification time sequence control and audio signal processing, a conventional system adopts a fixed time sequence and independent noise reduction algorithm, and linkage adaptation of the time sequence regulation and noise reduction algorithm cannot be realized, so that tone quality degradation and device loss risk are further aggravated. Based on the above-mentioned problems, an intelligent digital power amplifier system capable of realizing cooperative adaptation of load, power supply and interference is needed. Disclosure of Invention The intelligent power supply system comprises an intelligent power supply management module, an audio intelligent processing module, a power amplifier intelligent protection module and a vehicle cooperative control module, wherein the intelligent power supply management module is provided with an impedance monitoring unit, a PFC voltage stabilizing circuit and a DC-DC synchronous rectification circuit, the impedance monitoring unit is used for acquiring power amplifier load impedance, the intelligent power supply management module is used for calculating a voltage stabilizing correction coefficient based on the power amplifier load impedance and an input power supply parameter, the voltage stabilizing correction coefficient is used for regulating and controlling working parameters of the PFC voltage stabilizing circuit and the DC-DC synchronous rectification circuit, the power amplifier intelligent protection module is provided with an electromagnetic interference sensor and a time sequence duty ratio regulating and controlling factor based on the voltage stabilizing correction coefficient and the electromagnetic interference intensity of the motor, the audio intelligent processing module is internally provided with a filter and an LMS self-adaptive algorithm unit, the time sequence self-adaptive algorithm is used for optimizing the characteristic interference weight coefficient based on the power amplifier load impedance and the input power supply parameter, the power amplifier intelligent protection module is used for regulating and controlling the working parameters of the PFC voltage stabilizing correction circuit and the DC synchronous rectification circuit, the electromagnetic interference sensor is used for acquiring electromagnetic interference intensity of the motor, the time sequence duty ratio regulating and controlling factor of the time sequence is used for regulating and controlling the time sequence duty ratio of the power amplifier, the time sequence intelligent processing module is used for optimizing the characteristic of the power amplifier, the power amplification factor and the power amplification parameter and the power control module is used for optimizing and the power transmission and the power control factor. Preferably, the impedance monitoring unit of the intelligent power management module comprises a high-frequency sampling circuit and an impedance calculating subunit, wherein the high-frequency sampling circuit is used for collecting voltage signals and current signals of an output end of the power amplifier, the impedance calculating subunit is used for generating successful load impedance based on the voltage signals and the current signals, the PFC voltage stabilizing circuit and the DC-DC synchronous rectifying circuit adopt closed-loop control logic, receive voltage stabilizing correction coefficients, adjust circuit working parameters and regulate and control output voltage ripple. Further preferably, the power amplifier intelligent protection module is further configured with a multi-dimensional monitoring unit, the multi-dimensional monitoring unit comprises an output voltage m