CN-122000388-A - Methods, apparatus, controllers, systems, and products for disabling phase-locked loop circuits

CN122000388ACN 122000388 ACN122000388 ACN 122000388ACN-122000388-A

Abstract

The present disclosure relates to methods, apparatus, controllers, systems, and products for disabling phase-locked loop circuits. The method includes determining a current of a compressor in the fuel cell system. The method further includes determining that the fuel cell system is in a purge phase in response to the current being less than the current threshold. In addition, the method includes disabling a phase-locked loop circuit in the fuel cell system when the fuel cell system is in a purge phase, wherein the phase-locked loop circuit is configured to determine whether a fault exists in the compressor based on the current. According to the embodiment of the disclosure, the accuracy of judging the fault of the air compressor in the fuel cell system can be improved, and when the air compressor is in the purging stage, the normal operation of the fuel cell system is realized, so that the working efficiency of the fuel cell system is improved.

Inventors

ZHANG XIANGNAN
ZHANG LI
WANG CHUAN
JI KEYU

Assignees

罗伯特·博世有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (12)

1. A method (200) for disabling a phase-locked loop circuit, comprising: Determining (202) a current of an air compressor in the fuel cell system; Determining (206) that the fuel cell system is in a purge phase in response to the current being less than a current threshold, and Disabling (208) a phase-locked loop circuit in the fuel cell system, wherein the phase-locked loop circuit is configured to determine whether a fault exists in the air compressor based on the current, if the fuel cell system is in the purge phase.
2. The method (200) of claim 1, further comprising: determining a first rotational speed of the air compressor by a kalman filter; determining a second rotational speed of the air compressor by the phase-locked loop circuit, and In response to a difference between the first rotational speed and the second rotational speed being greater than a first threshold, determining that the fault is present in the air compressor.
3. The method (200) of claim 2, wherein the current is a measurement of an output current for the air compressor, and determining the first rotational speed of the air compressor according to a kalman filter comprises: determining an estimate of the output current for the air compressor based on the current at the historical moment; updating the estimated value based on the measured value, the estimated value and a gain coefficient of the Kalman filter, and The first rotational speed of the air compressor is determined based on the updated estimate.
4. The method (200) of claim 2, wherein determining, by the phase-locked loop circuit, the second rotational speed of the air compressor comprises: Determining an error signal based on the current, the error signal indicating a difference between an input phase and an output phase of the current; adjusting the current based on the error signal, and The second rotational speed of the air compressor is determined based on the adjusted current.
5. The method (200) of claim 1, wherein determining (206) that the fuel cell system is in a purge phase comprises: determining at least one of a mode and a rotational speed of the air compressor, and Determining that the fuel cell system is in the purge phase in response to the air compressor satisfying at least one of the following two conditions, and the current is less than the current threshold: The mode of the air compressor is a target mode; The rotational speed of the air compressor is a target rotational speed.
6. The method (200) of claim 5, wherein determining the current threshold comprises: determining a range of the current for the air compressor based on the target speed, and The current threshold is determined based on a lower value of the range.
7. The method (200) of claim 5, further comprising: In response to the air compressor meeting at least one of the two conditions and the current being less than the current threshold, sending a first signal to an upper system indicating that the fuel cell system is in the purge phase; A second signal is received from the superior system indicating a decision for maintaining the air compressor in a purge state.
8. The method (200) of claim 5, further comprising: Determining that the fuel cell system is in a normal operating phase in response to the air compressor not meeting at least one of the two conditions, or the current being greater than the current threshold; enabling a phase locked loop circuit when the fuel cell system is in the normal operation phase, and And determining whether a fault exists in the air compressor based on a difference between a first rotational speed determined by a Kalman filter and a second rotational speed determined by the phase-locked loop circuit.
9. An apparatus (500) for disabling a phase-locked loop circuit, comprising: a current determination module (502) configured to determine a current of an air compressor in the fuel cell system; a purge phase determination module (504) configured to determine that the fuel cell system is in a purge phase in response to the current being less than a current threshold, and A phase locked loop circuit disabling module (506) configured to disable a phase locked loop circuit in the fuel cell system if the fuel cell system is in the purge phase, wherein the phase locked loop circuit is configured to determine whether a fault exists in the air compressor based on the current.
10. A controller (115), comprising: At least one processor, and A memory coupled to the at least one processor and having instructions stored thereon that, when executed by the at least one processor, cause the controller to perform the method of any of claims 1-8.
11. A fuel cell system (100) comprising: air compressor (104) The controller (115) of claim 10.
12. A machine program product comprising a machine program to be executed by a processor to implement the method according to any one of claims 1 to 8.

Description

Methods, apparatus, controllers, systems, and products for disabling phase-locked loop circuits Technical Field Embodiments of the present disclosure relate generally to the field of fuel cell technology, and in particular, relate to methods, apparatus, controllers, systems, and products for disabling phase-locked loop circuits. Background The fuel cell system is an efficient and environment-friendly power generation system. The fuel chemical energy is directly converted into electrical energy by electrochemical reactions. Typically including fuel supply, oxidant supply, water/thermal management and control systems, etc. The fuel cell system has the advantages of high efficiency, environmental protection, cleanness, low noise and the like, and is suitable for the fields of transportation, aerospace, industrial vehicles and the like. In fuel cell systems, an air compressor is a critical component in fuel cell electric vehicles and is responsible for providing clean air at the required pressure and flow rate to the fuel cell stack to support the electrochemical reaction. At present, various fields are accelerating the research and development and application of the fuel cell air compressor technology so as to meet the high requirements of the fuel cell system on the air compressor. Disclosure of Invention Embodiments of the present disclosure provide a method, apparatus, controller, system, and article of manufacture for disabling a phase-locked loop circuit. In a first aspect of the present disclosure, a method for disabling a phase-locked loop circuit is provided. The method includes determining a current of a compressor in the fuel cell system. The method further includes determining that the fuel cell system is in a purge phase in response to the current being less than the current threshold. In addition, the method includes disabling a phase-locked loop circuit in the fuel cell system when the fuel cell system is in a purge phase, wherein the phase-locked loop circuit is configured to determine whether a fault exists in the compressor based on the current. In a second aspect of the present disclosure, an apparatus for disabling a phase-locked loop circuit is provided. The apparatus includes a current determination module configured to determine a current of a compressor in a fuel cell system. The apparatus also includes a purge phase determination module configured to determine that the fuel cell system is in a purge phase in response to the current being less than a current threshold. The apparatus further includes a phase-locked loop circuit disabling module configured to disable a phase-locked loop circuit in the fuel cell system when the fuel cell system is in a purge phase, wherein the phase-locked loop circuit is configured to determine whether a fault exists in the compressor based on the current. In a third aspect of the present disclosure, a controller is provided. The controller includes at least one processor. The controller further comprises a memory coupled to the at least one processor and having instructions stored thereon which, when executed by the at least one processor, cause the controller to perform the method provided according to the first aspect. In a fourth aspect of the present disclosure, there is provided a fuel cell system comprising the controller provided in accordance with the third aspect of the present disclosure. In a fifth aspect of the present disclosure, a machine program product is provided. The machine program product comprises a machine program to be executed by a processor to implement the method provided according to the first aspect of the present disclosure. In a sixth aspect of the present disclosure, a machine storage medium is provided. The machine-readable storage medium has stored thereon machine-executable instructions that are executed by a processor to implement the method provided according to the first aspect of the present disclosure. Drawings The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals designate like or similar elements, and wherein: FIG. 1 illustrates a schematic diagram of a fuel cell system in which some embodiments of the present disclosure may be implemented; Fig. 2 illustrates a flow chart of a method for disabling a phase-locked loop circuit in accordance with some embodiments of the present disclosure; FIG. 3 illustrates a schematic diagram of air compressor speed versus time for some embodiments of the present disclosure; FIG. 4 illustrates a flowchart of a method of determining that a fuel cell system is in a purge phase in accordance with some embodiments of the present disclosure; FIG. 5 illustrates a block diagram of an apparatus for disabling a phase-locked loop circuit in accordance with some