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CN-122014581-A - Method and system for optimizing starting of electric compressor

CN122014581ACN 122014581 ACN122014581 ACN 122014581ACN-122014581-A

Abstract

The invention discloses a method and a system for starting and optimizing an electric compressor, which belong to the technical field of automatic air conditioner compressor control, wherein the method comprises the steps of obtaining a target stable rotating speed of the electric compressor when the compressor is started; the method comprises the steps of determining closed loop speed increasing time of a compressor according to a target stable rotating speed, a preset speed increasing rate and open loop operation time, controlling the compressor to perform open loop operation according to the preset speed increasing rate, setting the open loop operation time, wherein the preset speed increasing rate is the speed increasing rate when the NVH performance of the compressor is optimal when the compressor is started, and then controlling the compressor to perform closed loop operation according to the preset speed increasing rate to determine the closed loop speed increasing time, and starting the electric compressor. On the basis of improving the NVH performance of the compressor, the starting performance of the compressor is ensured.

Inventors

  • SHI YING
  • ZHU SHUNKUAN
  • TONG RUI

Assignees

  • 奇瑞汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20250704

Claims (10)

  1. 1. A method of optimizing the start-up of an electric compressor, the method comprising: When the compressor is started, obtaining a target stable rotating speed of the electric compressor; Determining closed loop speed-increasing time length of the compressor according to the target stable rotating speed, the preset speed-increasing speed and the open loop operation time length; Controlling the compressor to perform open-loop operation according to a preset speed-up rate, wherein the preset speed-up rate is the speed-up rate when the NVH performance of the compressor is optimal when the compressor is started; and then, controlling the compressor to perform closed-loop running according to a preset speed-up rate to determine the closed-loop speed-up time length, and starting the electric compressor.
  2. 2. The method of optimizing motor-driven compressor start-up of claim 1, wherein the open loop run length is less than a length of time from when the motor-driven compressor starts up to when the motor-driven compressor resonates with the compressor at a predetermined ramp rate.
  3. 3. The method of optimizing the start-up of an electric compressor of claim 1, wherein the closed loop ramp-up period is equal to the target steady rotational speed divided by the preset ramp-up rate minus the open loop run period.
  4. 4. The method of optimizing the start-up of an electric compressor as set forth in claim 1, wherein the frequency of the compressor is controlled to be half of the frequency of the normal operation phase of the compressor in the open-loop operation phase and the closed-loop operation phase of the compressor.
  5. 5. The method for optimizing the start-up of an electric compressor according to claim 1, wherein the open-loop operation time length and the speed-up rate of the compressor for each vehicle type are determined and marked by configuration words; when the starting control is carried out on the compressor, determining corresponding open-loop running time length and speed increasing rate of the compressor according to the configuration word of the vehicle; and starting and controlling the compressor according to the determined open-loop running time length and the determined speed-up rate of the compressor.
  6. 6. The method for optimizing the start-up of an electric compressor as set forth in claim 1, wherein the target steady rotational speed of the electric compressor is determined according to an operation mode of the air conditioner.
  7. 7. An electric compressor start-up optimization system, the apparatus comprising: The data acquisition unit is used for acquiring a target stable rotating speed of the electric compressor when the compressor is started; the closed-loop speed-up time length determining unit is used for determining the closed-loop speed-up time length of the compressor according to the target stable rotating speed, the preset speed-up rate and the open-loop operation time length; the control unit is used for controlling the compressor to perform open-loop operation according to a preset speed increasing rate, setting open-loop operation time, and then controlling the compressor to start the electric compressor according to a closed-loop speed increasing time determined by closed-loop operation of the preset speed increasing rate, wherein the preset speed increasing rate is determined according to a rotating speed interval and a resonance time of resonance of the whole vehicle and the compressor when the electric compressor is started.
  8. 8. A control device comprising one or more processors and one or more memories, the one or more memories having stored therein at least one program code loaded and executed by the one or more processors to implement the method of electric compressor start-up optimization of any of claims 1-6.
  9. 9. A computer readable storage medium having stored therein at least one program code, the at least one program code loaded and executed by a processor to implement an electric compressor start-up optimization method of any one of claims 1-6.
  10. 10. A computer program product, characterized in that it comprises a computer program code, which is stored in a computer readable storage medium, from which computer program code a processor of a control device reads, which processor executes the computer program code, so that the control device performs a method of electric compressor start-up optimization according to any one of claims 1-6.

Description

Method and system for optimizing starting of electric compressor Technical Field The invention relates to the technical field of automatic air conditioner compressor control, in particular to a starting optimization method and system for an electric compressor. Background The thermal management system of the vehicle exhibits driving comfort and functional performance associated with the passenger compartment. The electric compressor is used as a core component of the thermal management system, plays an important role in realizing subjective feeling of the thermal management system on the passenger cabin, and can optimize NVH subjective feeling of the passenger cabin when the air conditioner is started and starting capability of the air conditioner by optimizing a starting strategy of the compressor. The current method for optimizing NVH performance of the compressor during starting is to optimize NVH performance of the whole vehicle by adjusting dynamic balance of a motor rotor of the compressor to be matched with the whole vehicle. The starting performance of the compressor is related to the dynamic balance quantity of the motor rotor of the compressor, and when the NVH performance of the whole vehicle is optimized by the current method, the starting performance of the compressor cannot be ensured after the dynamic balance quantity of the motor rotor of the compressor is adjusted. Disclosure of Invention The embodiment of the invention provides a method and a system for starting and optimizing an electric compressor, which ensure the starting performance of the compressor on the basis of improving the NVH performance of the compressor. The technical scheme of the invention is as follows: In a first aspect, there is provided a method of optimizing the start-up of an electric compressor, the method comprising: When the compressor is started, obtaining a target stable rotating speed of the electric compressor; Determining closed loop speed-increasing time length of the compressor according to the target stable rotating speed, the preset speed-increasing speed and the open loop operation time length; Controlling the compressor to perform open-loop operation according to a preset speed-up rate, wherein the preset speed-up rate is the speed-up rate when the NVH performance of the compressor is optimal when the compressor is started; and then, controlling the compressor to perform closed-loop running according to a preset speed-up rate to determine the closed-loop speed-up time length, and starting the electric compressor. Optionally, the open loop operation duration is less than a duration from when the electric compressor is started to when the electric compressor resonates with the compressor according to a preset speed-up rate. Alternatively, the closed loop ramp-up period is equal to the target steady rotational speed divided by the preset ramp-up rate minus the open loop run period. Alternatively, the frequency of the compressor is controlled to be half of the frequency of the normal operation phase of the compressor in the open-loop operation phase and the closed-loop operation phase of the compressor. Optionally, determining the open-loop running time and the speed increasing rate of the compressor of each vehicle type, and marking by configuration words; when the starting control is carried out on the compressor, determining corresponding open-loop running time length and speed increasing rate of the compressor according to the configuration word of the vehicle; and starting and controlling the compressor according to the determined open-loop running time length and the determined speed-up rate of the compressor. Alternatively, the target steady rotational speed of the electric compressor is determined according to the operation mode of the air conditioner. In a second aspect, there is provided an electric compressor start-up optimization system comprising: The data acquisition unit is used for acquiring a target stable rotating speed of the electric compressor when the compressor is started; the closed-loop speed-up time length determining unit is used for determining the closed-loop speed-up time length of the compressor according to the target stable rotating speed, the preset speed-up rate and the open-loop operation time length; the control unit is used for controlling the compressor to perform open-loop operation according to a preset speed increasing rate, setting open-loop operation time, and then controlling the compressor to start the electric compressor according to a closed-loop speed increasing time determined by closed-loop operation of the preset speed increasing rate, wherein the preset speed increasing rate is determined according to a rotating speed interval and a resonance time of resonance of the whole vehicle and the compressor when the electric compressor is started. In a third aspect, a control apparatus is provided, the control apparatus comprising one or more processors and one o