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Switching frequency control method and device of inverter and computer readable storage medium

A switching frequency and control method technology, applied in the field of computer readable storage medium and inverter switching frequency control, can solve the problems of increasing the manufacturing cost of the inverter, affecting the ride comfort of vehicles, etc., to meet noise requirements, reduce effect of noise

Active Publication Date: 2019-09-06
GUANGZHOU AUTOMOBILE GROUP CO LTD
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AI Technical Summary

Problems solved by technology

[0003] The working process of the inverter will generate corresponding noise. If it is applied to new energy vehicles, it will greatly affect the ride comfort of the vehicle
The currently disclosed technology only involves changing the structure of the inverter or adding sound insulation and absorption measures to optimize the body noise, which will undoubtedly increase the manufacturing cost of the inverter

Method used

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  • Switching frequency control method and device of inverter and computer readable storage medium
  • Switching frequency control method and device of inverter and computer readable storage medium
  • Switching frequency control method and device of inverter and computer readable storage medium

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] see figure 1 , which is a schematic flowchart of a method for controlling the switching frequency of an inverter provided in an embodiment of the present invention, and the method includes the following steps:

[0035] S1, controlling the switching frequency of the inverter to be randomly varied within the frequency conversion range corresponding to the current period in the current period;

[0036] S2. Obtain the working noise amplitude of the inverter wit...

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Abstract

The embodiment of the invention provides a switching frequency control method and device of an inverter and a computer readable storage medium. The method comprises the steps: controlling the switching frequency of the inverter to perform random frequency conversion within the frequency conversion range corresponding to the current cycle within the current cycle; obtaining the operating noise amplitude of the inverter in the preset period of the current cycle; increasing the frequency conversion range corresponding to the next cycle when the operating noise amplitude is higher than the presetnoise amplitude threshold; and using the frequency conversion range of the current cycle as the frequency conversion range corresponding to the next cycle when the operating noise amplitude is lower than or equal to the noise amplitude threshold. The frequency conversion range which meets the noise requirement can be found by continuously cycling so that the switching frequency of the inverter israndomly converted within the frequency conversion range which meets the noise requirement, the noise requirement can be met and thus the noise generated by the inverter can be effectively reduced without changing the structure of the inverter or additionally arranging sound isolation and absorption measures.

Description

technical field [0001] The present invention relates to the technical field of inverters, in particular to a switching frequency control method and device of an inverter and a computer-readable storage medium. Background technique [0002] The inverter is a device that converts DC power (battery, storage battery) into AC power (generally 220v50HZ sine or square wave), consisting of inverter bridge, control logic and filter circuit. New energy vehicles generally use AC motors as the main power source, and the power battery of new energy vehicles is a DC power supply. In order to supply power to the AC motor, this requires an inverter in the motor controller to convert the DC power of the power battery into AC power for the motor. Power supply works. [0003] The working process of the inverter will generate corresponding noise. If it is applied to new energy vehicles, it will greatly affect the ride comfort of the vehicle. The currently disclosed technologies only involve c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
CPCH02M7/48
Inventor 刘渊徐周亮郭杨甫罗科王理周徐仰汇
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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