CN118311337A - Motor open-phase detection method based on vehicle, vehicle and related equipment - Google Patents

Abstract

The application provides a motor open-phase detection method based on a vehicle, the vehicle and related equipment, wherein the vehicle comprises a motor for providing power for the vehicle, and the method comprises the following steps: detecting whether the vehicle is in a normal running state; when the vehicle is detected to be in a normal running state, acquiring three-phase current values of the motor in real time within a preset time length; detecting whether first absolute values of the sum of phase current values of any two phases in the three-phase current values are smaller than a first preset threshold value within a preset time period or not, and detecting whether second absolute values of phase current values of a third phase in the three-phase current values are smaller than a second preset threshold value within the preset time period or not; and determining the phase loss corresponding to the second absolute value when the first absolute value is detected to be smaller than the first preset threshold value within the preset time period and the second absolute value is detected to be smaller than the second preset threshold value within the preset time period. The application can accurately diagnose the phase failure fault of the three-phase power line, and improves the safety and reliability of vehicle running.

Description

Motor open-phase detection method based on vehicle, vehicle and related equipment

Technical Field

The present application relates to the field of vehicle technologies, and in particular, to a motor phase loss detection method based on a vehicle, a vehicle and related devices.

Background

The motor drive controller and the motor drive thereof are core components of the vehicle, and the motor drive controller and the motor drive motor jointly provide power for normal running of the vehicle. The motor drive controller receives command signals of the whole vehicle controller, converts battery voltage at a high-voltage direct-current side of the vehicle into alternating-current voltage with specific frequency and amplitude through a pulse width modulation technology, outputs the alternating-current voltage to the drive motor so as to generate required torque and rotation speed, and is connected with the drive motor through a three-phase power line.

After long-term use, the three-phase power line may have phenomena of loosening and breaking of joints due to vibration, corrosion and the like, which may cause connection failure between the motor drive controller and the drive motor, and this phenomenon is generally called phase failure. The phase failure will cause abnormal phenomena such as overlarge torque output pulsation, distortion of alternating current waveform, increase of motor noise, etc., and overcurrent can occur when serious, even the controller or the motor is damaged. Therefore, reliable diagnosis of phase failure is of great importance for functional safety research of vehicles.

Disclosure of Invention

In view of the above, the application provides a motor open-phase detection method based on a vehicle, the vehicle and related equipment, which can accurately diagnose open-phase faults of a three-phase power line, and improve the safety and reliability of vehicle running.

The embodiment of the application provides a motor open-phase detection method based on a vehicle, wherein the vehicle comprises a motor for providing power for the vehicle, and the method comprises the following steps: detecting whether the vehicle is in a normal running state; when the vehicle is detected to be in the normal running state, acquiring the three-phase current value of the motor in real time within a preset duration; detecting whether first absolute values of the sum of phase current values of any two phases in the three-phase current values are smaller than a first preset threshold value within the preset time period or not, and detecting whether second absolute values of phase current values of a third phase in the three-phase current values are smaller than a second preset threshold value within the preset time period or not; and determining a phase-loss phase corresponding to the second absolute value when the first absolute value is detected to be smaller than the first preset threshold value in the preset time period and the second absolute value is detected to be smaller than the second preset threshold value in the preset time period.

Compared with the related art, the embodiment of the application has at least the following advantages: whether the vehicle is in a normal running state or not is detected, so that the necessity of motor open-phase detection is determined conveniently, and the detection efficiency of motor open-phase detection is improved; and when the first absolute value is detected to be smaller than the first preset threshold value within the preset duration and the second absolute value is detected to be smaller than the second preset threshold value within the preset duration, the phase loss corresponding to the second absolute value is determined, so that on one hand, the phase loss detection can be carried out without additional equipment, the cost of the motor phase loss detection is reduced, and on the other hand, the detection mode can accurately diagnose the phase loss fault of the three-phase power line, thereby improving the safety and reliability of vehicle running.

In some possible implementations, before acquiring the three-phase current value of the motor in real time within a preset duration, the method further includes: acquiring initial three-phase current of the motor; zero drift compensation is carried out on the phase current of each phase in the initial three-phase current, so that the current fluctuation of the phase current of each phase in the initial three-phase current is within a preset range; the acquiring the three-phase current value of the motor in real time within the preset duration comprises the following steps: and acquiring three-phase current values of the motor after zero drift compensation in real time within the preset time.

In some possible implementations, the vehicle further includes a motor controller for controlling operation of the motor; the zero drift compensation for the phase current of each phase in the initial three-phase current comprises: inputting the initial three-phase current into the motor controller so that the motor controller can carry out zero drift compensation on the three-phase current.

In some possible implementations, the vehicle further includes a battery, a power cell, and an inverter; the storage battery is used for providing electric quantity for electronic equipment of the vehicle, the power battery is used for providing electric quantity for the motor, and the inverter is used for converting direct current output by the storage battery and the power battery into alternating current; the detecting whether the vehicle is in a normal running state includes: detecting whether the vehicle is started, whether a relay of the power battery is closed, whether the voltage of the power battery is larger than a preset voltage, whether the voltage of the storage battery is within a preset voltage range, whether the inverter is in a duty ratio mode and whether the operation parameters of the motor meet preset requirements; when the vehicle is detected to be in the normal running state, acquiring the three-phase current value of the motor in real time within a preset duration, including: and after detecting that the vehicle is started, the relay of the power battery is closed, the voltage of the power battery is larger than a preset voltage, the voltage of the storage battery is in a preset voltage range, the inverter is in a duty ratio mode, and the operation parameters of the motor meet preset requirements, acquiring the three-phase current value of the motor in real time within the preset duration.

In some possible implementations, detecting whether the operating parameter of the motor meets the preset requirement includes: detecting whether the request torque of the motor is larger than a first preset torque threshold value; detecting whether the absolute value of the difference between the requested torque and the actual torque of the motor is larger than a second preset torque threshold value; and when the request torque is detected to be larger than the first preset torque threshold value and the absolute value is detected to be larger than the second preset torque threshold value, judging that the operation parameter of the motor meets the preset requirement.

In some possible implementations, the three-phase current values include a W-phase current value, a U-phase current value, and a V-phase current value; detecting whether first absolute values of sums of phase current values of any two phases of the three-phase current values are smaller than a first preset threshold value within the preset time period, and detecting whether second absolute values of phase current values of a third phase of the three-phase current values are smaller than a second preset threshold value within the preset time period, includes: detecting whether absolute values of the sum of the W-phase current value and the V-phase current value are smaller than the first preset threshold value within the preset duration, and detecting whether absolute values of the U-phase current value are smaller than the second preset threshold value within the preset duration; detecting whether absolute values of the sum of the W-phase current value and the U-phase current value are smaller than the first preset threshold value within the preset duration, and detecting whether absolute values of the V-phase current value are smaller than the second preset threshold value within the preset duration; detecting whether absolute values of the sum of the U-phase current value and the V-phase current value are smaller than the first preset threshold value within the preset duration, and detecting whether absolute values of the W-phase current value are smaller than the second preset threshold value within the preset duration.

In some possible implementations, after determining the phase loss corresponding to the second absolute value, further includes: and sending motor fault information and controlling the motor to stop running.

In a second aspect, the application discloses a vehicle comprising: a motor, a motor controller; the motor is used for providing power for the vehicle; the motor controller is used for detecting whether the vehicle is in a normal running state or not, and acquiring three-phase current values of the motor in real time within a preset duration when the vehicle is detected to be in the normal running state; the motor controller is further configured to detect whether first absolute values of sums of phase current values of any two phases of the three-phase current values are all smaller than a first preset threshold value within the preset duration, and detect whether second absolute values of phase current values of a third phase of the three-phase current values are all smaller than a second preset threshold value within the preset duration; and when the motor controller detects that the first absolute value is smaller than the first preset threshold value in the preset time period and the second absolute value is smaller than the second preset threshold value in the preset time period, determining the phase interruption corresponding to the second absolute value.

The third aspect of the application discloses an electronic device, which comprises a processor and a memory, wherein the memory is used for storing instructions, and the processor is used for calling the instructions in the memory, so that the electronic device executes the motor open-phase detection method based on the vehicle.

A fourth aspect of the application discloses a storage medium comprising computer instructions that, when executed on an electronic device, cause the electronic device to perform the vehicle-based motor open-phase detection method described above.

It will be appreciated that the vehicle of the second aspect, the electronic device of the third aspect and the storage medium of the fourth aspect provided above all correspond to the method of the first aspect, and therefore, the advantages achieved by the method may refer to the advantages in the corresponding method provided above, and will not be repeated here.

Drawings

Fig. 1 is a flow chart of a vehicle-based motor open-phase detection method according to one embodiment of the invention.

Fig. 2 is a flow chart of a phase-loss fault diagnosis of a vehicle according to an embodiment of the present invention.

Fig. 3 is a flow chart of a vehicle-based motor open-phase detection method according to one embodiment of the invention.

Fig. 4 is a flow chart of a vehicle-based motor open-phase detection method according to one embodiment of the invention.

Fig. 5 is a schematic block diagram of a vehicle according to one embodiment of the invention.

Fig. 6 is a functional block diagram of an electronic device according to an embodiment of the invention.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. The embodiments of the present application and the features in the embodiments may be combined with each other without collision.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the described embodiments are merely some, rather than all, of the embodiments of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It is further intended that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The term "at least one" in the present application means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and the representation may have three relationships, for example, a and/or B may represent: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The terms "first," "second," "third," "fourth" and the like in the description and in the claims and drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Referring to fig. 1, a schematic flow chart of a motor open-phase detection method based on a vehicle according to an embodiment of the application includes the following steps:

Step 101, detecting whether the vehicle is in a normal running state.

In some embodiments, the vehicle includes an electric vehicle or a hybrid vehicle, or the like. The present embodiment is not particularly limited as to the type of vehicle, and the vehicle is only required to have a motor for powering the vehicle.

In some embodiments, a vehicle includes a battery, a power cell, and an inverter; the storage battery is used for providing electric quantity for electronic equipment of the vehicle, the power battery is used for providing electric quantity for the motor, and the inverter is used for converting direct current output by the storage battery and the power battery into alternating current; detecting whether the vehicle is in a normal running state by: detecting whether the vehicle is started, whether a relay of the power battery is closed, whether the voltage of the power battery is larger than a preset voltage, whether the voltage of the storage battery is within a preset voltage range, whether the inverter is in a duty ratio mode and whether the operation parameters of the motor meet preset requirements.

In some embodiments, whether the vehicle is started is detected by detecting whether the switching power supply KL15 of the vehicle is turned on. The switching power supply KL15 supplies power to electronic control modules in the vehicle, such as an engine control module, an air flow meter, an oxygen sensor, etc., at the moment when it is turned on, and once it is ignited, the switching power supply KL15 stops supplying power. That is, when the switching power supply KL15 of the vehicle is in the on state, it is indicated that the vehicle is started.

It can be understood that the power battery will output electric power outwards after the relay of the power battery is closed, so when the vehicle is in a normal running state, the relay of the power battery needs to be in a closed state.

In some embodiments, the magnitude of the preset voltage is not specifically limited, for example, the preset voltage may be 160V, 165V, 170V, etc., and only the normal operation of the motor needs to be ensured.

In some embodiments, the preset voltage range is greater than or equal to 9V and less than or equal to 15V. Specifically, the storage battery is also called a constant power KL30, which continuously supplies power to various electronic devices in the automobile, such as sound equipment, car navigation, an air conditioning system, etc., in a state where the ignition of the automobile is turned on.

Since the power battery and the battery output are both direct currents, the inverter needs to be in a duty ratio mode to convert the direct currents output by the battery and the power battery into alternating currents, so as to supply power to the motor and other electronic devices of the vehicle.

In some embodiments, it is detected whether the operating parameters of the motor meet preset requirements by: detecting whether the request torque of the motor is larger than a first preset torque threshold value; detecting whether the absolute value of the difference between the requested torque and the actual torque of the motor is larger than a second preset torque threshold value; and when the request torque is detected to be larger than the first preset torque threshold value and the absolute value is detected to be larger than the second preset torque threshold value, judging that the operation parameters of the motor meet the preset requirements.

Specifically, the operating parameters of the motor include a requested torque of the motor and an actual torque of the motor, which refers to a torque actually generated by the motor during operation. The requested torque of the motor refers to the torque that the motor needs to generate when running, i.e. the magnitude of the torque output by the motor. In engineering application, the required torque of the motor often corresponds to the load torque, that is, the torque output by the motor needs to meet the load requirement, so that the motor can normally operate. Therefore, the embodiment judges whether the motor normally operates by detecting whether the request torque is greater than a first preset torque threshold value and whether the absolute value of the difference between the request torque and the actual torque is greater than a second preset torque threshold value.

In some embodiments, the magnitude of the first preset torque threshold is not specifically limited, for example, the first preset torque threshold may be 20n.m, 22n.m, 24n.m, or the like.

In some embodiments, the absolute value of the difference between the requested torque and the actual torque is not particularly limited, e.g., the absolute value may be 18n.m, 19n.m, 20n.m, etc.

In some embodiments, to further ensure that the vehicle is in a normal running state, a driving scenario of the vehicle may also be detected, for example, when the driving scenario of the vehicle is detected as a collision test scenario, a transportation scenario, or the like, it is determined that the vehicle is not in a normal running state at this time.

Step 102, when the vehicle is detected to be in a normal running state, acquiring three-phase current values of the motor in real time within a preset duration.

In some embodiments, the size of the preset time period is not specifically limited, and may be set according to actual requirements. For example, the size of the preset time period may be 1S, 2S, 3S, or the like.

Step 103, detecting whether first absolute values of the sum of phase current values of any two phases in the three-phase current values are smaller than a first preset threshold value within a preset time period, and detecting whether second absolute values of phase current values of a third phase in the three-phase current values are smaller than a second preset threshold value within the preset time period.

In some embodiments, the size of the first preset threshold is not specifically limited, and the size of the first preset threshold may be 14A, 15A, 16A, etc., and may be set according to actual requirements.

In some embodiments, the size of the second preset threshold is not specifically limited, and the size of the second preset threshold may be 9A, 10A, 11A, etc., and may be set according to actual requirements.

In some embodiments, the three-phase current values include a W-phase current value, a U-phase current value, and a V-phase current value; detecting whether first absolute values of sums of phase current values of any two phases in the three-phase current values are smaller than a first preset threshold value within a preset time period, and detecting whether second absolute values of phase current values of a third phase in the three-phase current values are smaller than a second preset threshold value within the preset time period, comprises:

Detecting whether the absolute value of the sum of the W-phase current value and the V-phase current value is smaller than a first preset threshold value within a preset time period or not, and detecting whether the absolute value of the U-phase current value is smaller than a second preset threshold value within the preset time period or not; detecting whether the absolute value of the sum of the W-phase current value and the U-phase current value is smaller than a first preset threshold value within a preset time period or not, and detecting whether the absolute value of the V-phase current value is smaller than a second preset threshold value within the preset time period or not; detecting whether the absolute value of the sum of the U-phase current value and the V-phase current value is smaller than a first preset threshold value within a preset time period or not, and detecting whether the absolute value of the W-phase current value is smaller than a second preset threshold value within the preset time period or not.

Step 104, determining a phase-missing phase corresponding to the second absolute value when the first absolute value is detected to be smaller than the first preset threshold value within the preset time period and the second absolute value is detected to be smaller than the second preset threshold value within the preset time period.

For easy understanding, the following describes how to perform the open-phase fault diagnosis of the three-phase current according to the present embodiment with reference to fig. 2:

Taking the preset duration as 1S, the first preset threshold as 15A and the second preset threshold as 10A as an example, after detecting that the vehicle is in a normal running state, determining that the U phase is out of phase when the absolute value of the sum of the W phase current value and the V phase current value detected in 1S is smaller than 15A and the U phase current value detected in 1S is smaller than 10A; otherwise, when the absolute value of the sum of the W-phase current value and the U-phase current value detected in the 1S is smaller than 15A and the V-phase current value detected in the 1S is smaller than 10A, judging that the V-phase is open-phase; otherwise, when the absolute value of the sum of the V-phase current value and the U-phase current value is detected to be smaller than 15A in 1S, and the W-phase current value is detected to be smaller than 10A in 1S, the W-phase open phase is judged.

Compared with the related art, the embodiment of the application has at least the following advantages: whether the vehicle is in a normal running state or not is detected, so that the necessity of motor open-phase detection is determined conveniently, and the detection efficiency of motor open-phase detection is improved; and when the first absolute value is detected to be smaller than the first preset threshold value within the preset duration and the second absolute value is detected to be smaller than the second preset threshold value within the preset duration, the phase loss corresponding to the second absolute value is determined, so that on one hand, the phase loss detection can be carried out without additional equipment, the cost of the motor phase loss detection is reduced, and on the other hand, the detection mode can accurately diagnose the phase loss fault of the three-phase power line, thereby improving the safety and reliability of vehicle running.

Referring to fig. 3, fig. 3 is a flow chart of a motor open-phase detection method based on a vehicle according to an embodiment of the present application, which is a further improvement of the foregoing embodiment, and is mainly improved in that, in the present embodiment, before acquiring three-phase current values of a motor in real time within a preset duration, the method further includes: and acquiring initial three-phase current of the motor, and performing zero drift compensation on phase current of each phase in the initial three-phase current so as to enable current fluctuation of the phase current of each phase in the initial three-phase current to be in a preset range. By the mode, the accuracy of motor open-phase detection can be further improved, and therefore the reliability and safety of vehicle running are further ensured.

The specific flow of this embodiment is shown in fig. 3, and includes the following steps:

step 201, detecting whether the vehicle is in a normal running state.

Step 202, when the vehicle is detected to be in a normal running state, acquiring initial three-phase current of the motor.

Step 203, performing zero drift compensation on the phase current of each phase in the initial three-phase current, so that the current fluctuation of the phase current of each phase in the initial three-phase current is within a preset range.

Specifically, the vehicle further comprises a motor controller, wherein the motor controller is used for controlling the operation of the motor; zero drift compensation is performed on the phase current of each phase in the initial three-phase current by: the initial three-phase current is input into the motor controller to enable the motor controller to carry out zero drift compensation on the three-phase current.

It should be noted that, when the current fluctuation of the initial three-phase current of the motor is large, the result of the subsequent open-phase fault detection is inaccurate, and the accuracy of open-phase fault detection can be further improved by controlling the current fluctuation of the phase current of each phase in the initial three-phase current within a preset range, for example, the current fluctuation of the phase current of each phase is controlled to be ±5a.

And 204, acquiring three-phase current values of the motor after zero drift compensation in real time within a preset time.

Step 205, detecting whether first absolute values of the sum of phase current values of any two phases of the three-phase current values are smaller than a first preset threshold value within a preset duration, and detecting whether second absolute values of phase current values of a third phase of the three-phase current values are smaller than a second preset threshold value within the preset duration.

Step 206, determining the phase loss phase corresponding to the second absolute value when the first absolute value is detected to be smaller than the first preset threshold value within the preset time period and the second absolute value is detected to be smaller than the second preset threshold value within the preset time period.

Steps 201, 205 and 206 of this embodiment are similar to steps 101, 103 and 104 of the foregoing embodiments, and are not repeated here.

Compared with the related art, the embodiment of the application has at least the following advantages: whether the vehicle is in a normal running state or not is detected, so that the necessity of motor open-phase detection is determined conveniently, and the detection efficiency of motor open-phase detection is improved; and when the first absolute value is detected to be smaller than the first preset threshold value within the preset duration and the second absolute value is detected to be smaller than the second preset threshold value within the preset duration, the phase loss corresponding to the second absolute value is determined, so that on one hand, the phase loss detection can be carried out without additional equipment, the cost of the motor phase loss detection is reduced, and on the other hand, the detection mode can accurately diagnose the phase loss fault of the three-phase power line, thereby improving the safety and reliability of vehicle running.

Referring to fig. 4, fig. 4 is a flow chart of a motor open-phase detection method based on a vehicle according to an embodiment of the present application, which is a further improvement of the foregoing embodiment, and is mainly improved in that, in the present embodiment, after determining the open-phase corresponding to the second absolute value, the method further includes: and sending motor fault information and controlling the motor to stop running. In this way, the reliability and safety of the running of the vehicle can be further improved.

The specific flow of this embodiment is shown in fig. 4, and includes the following steps:

step 301, detecting whether the vehicle is in a normal running state.

And 302, acquiring three-phase current values of the motor in real time within a preset duration when the vehicle is detected to be in a normal running state.

Step 303, detecting whether first absolute values of the sum of phase current values of any two phases of the three-phase current values are smaller than a first preset threshold value within a preset time period, and detecting whether second absolute values of phase current values of a third phase of the three-phase current values are smaller than a second preset threshold value within the preset time period.

Step 304, determining a phase-missing phase corresponding to the second absolute value when the first absolute value is detected to be smaller than the first preset threshold value within the preset time period and the second absolute value is detected to be smaller than the second preset threshold value within the preset time period.

Steps 301 to 304 of the present embodiment are similar to steps 101 to 104 of the foregoing embodiments, and are not repeated here.

Step 305: and sending motor fault information and controlling the motor to stop running.

In some embodiments, the type of the fault information is not specifically limited, and the type of the fault information can be voice reminding, text reminding and the like and can be set according to actual requirements.

Compared with the related art, the embodiment of the application has at least the following advantages: whether the vehicle is in a normal running state or not is detected, so that the necessity of motor open-phase detection is determined conveniently, and the detection efficiency of motor open-phase detection is improved; and when the first absolute value is detected to be smaller than the first preset threshold value within the preset duration and the second absolute value is detected to be smaller than the second preset threshold value within the preset duration, the phase loss corresponding to the second absolute value is determined, so that on one hand, the phase loss detection can be carried out without additional equipment, the cost of the motor phase loss detection is reduced, and on the other hand, the detection mode can accurately diagnose the phase loss fault of the three-phase power line, thereby improving the safety and reliability of vehicle running.

Referring to fig. 5, fig. 5 is a schematic block diagram of a vehicle according to an embodiment of the present application. As shown in fig. 5, the vehicle 100 includes: a motor 1 and a motor controller 2.

The motor 1 is used to power the vehicle 100; the motor controller 2 is used for detecting whether the vehicle 100 is in a normal running state or not, and acquiring three-phase current values of the motor in real time within a preset duration when the vehicle 100 is detected to be in the normal running state; the motor controller 2 is further configured to detect whether first absolute values of sums of phase current values of any two phases of the three-phase current values are all smaller than a first preset threshold value within a preset duration, and detect whether second absolute values of phase current values of a third phase of the three-phase current values are all smaller than a second preset threshold value within the preset duration; and when the motor controller 2 detects that the first absolute values are smaller than the first preset threshold value within the preset time period and the second absolute values are smaller than the second preset threshold value within the preset time period, determining the phase loss corresponding to the second absolute values.

Referring to fig. 6, a hardware structure diagram of an electronic device 1000 according to an embodiment of the application is shown. As shown in fig. 6, the electronic device 1000 may include a processor 1001, a memory 1002. The memory 1002 is used to store one or more computer programs 1003. One or more computer programs 1003 are configured to be executed by the processor 1001. The one or more computer programs 1003 include instructions that can be used to implement the vehicle-based motor open-phase detection method described above for execution in the electronic device 1000.

It is to be understood that the configuration illustrated in the present embodiment does not constitute a specific limitation on the electronic apparatus 1000. In other embodiments, electronic device 1000 may include more or fewer components than shown, or may combine certain components, or split certain components, or a different arrangement of components.

The processor 1001 may include one or more processing units, such as: the processor 1001 may include an application processor (application processor, AP), a modem, a graphics processor (graphics processing unit, GPU), an image signal processor (IMAGE SIGNAL processor, ISP), a controller, a video codec, a digital signal processor (DIGITAL SIGNAL processor, DSP), a baseband processor, and/or a neural Network Processor (NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

The processor 1001 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 1001 is a cache memory. The memory may hold instructions or data that the processor 1001 has just used or recycled. If the processor 1001 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 1001 is reduced, thus improving the efficiency of the system.

In some embodiments, the processor 1001 may include one or more interfaces. The interfaces may include an integrated circuit (inter-INTEGRATED CIRCUIT, I2C) interface, an integrated circuit built-in audio (inter-INTEGRATED CIRCUIT SOUND, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a SIM interface, and/or a USB interface, among others.

In some embodiments, the processor 1001 is configured to execute Single Instruction Multiple Data (SIMD), very Long Instruction Word (VLIW), or the like acceleration schemes.

In some embodiments, memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

The present embodiment also provides a storage medium having stored therein computer instructions that, when executed on an electronic device, cause the electronic device to perform the above-described related method steps to implement the vehicle-based motor open-phase detection method in the above-described embodiments.

The electronic device and the storage medium provided in this embodiment are used to execute the corresponding methods provided above, so that the beneficial effects that can be achieved by the electronic device and the storage medium can refer to the beneficial effects in the corresponding methods provided above, and are not described herein.

In practical applications, the above-mentioned functions may be distributed by different functional modules according to the need, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In several embodiments provided by the present application, the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are illustrative, and the module or division of the units, for example, is a logic function division, and may be implemented in other manners, such as multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated unit may be stored in a readable storage medium if implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application.

Claims (10)

1. A vehicle-based motor open-phase detection method, wherein the vehicle includes a motor for powering the vehicle, the method comprising:

Detecting whether the vehicle is in a normal running state;

when the vehicle is detected to be in the normal running state, acquiring the three-phase current value of the motor in real time within a preset duration;

detecting whether first absolute values of the sum of phase current values of any two phases in the three-phase current values are smaller than a first preset threshold value within the preset time period or not, and detecting whether second absolute values of phase current values of a third phase in the three-phase current values are smaller than a second preset threshold value within the preset time period or not;

and determining a phase-loss phase corresponding to the second absolute value when the first absolute value is detected to be smaller than the first preset threshold value in the preset time period and the second absolute value is detected to be smaller than the second preset threshold value in the preset time period.

2. The vehicle-based motor open-phase detection method according to claim 1, further comprising, before acquiring three-phase current values of the motor in real time for a preset period of time:

acquiring initial three-phase current of the motor;

Zero drift compensation is carried out on the phase current of each phase in the initial three-phase current, so that the current fluctuation of the phase current of each phase in the initial three-phase current is within a preset range;

The acquiring the three-phase current value of the motor in real time within the preset duration comprises the following steps:

and acquiring three-phase current values of the motor after zero drift compensation in real time within the preset time.

3. The vehicle-based motor open-phase detection method according to claim 2, wherein the vehicle further comprises a motor controller for controlling operation of the motor; the zero drift compensation for the phase current of each phase in the initial three-phase current comprises:

inputting the initial three-phase current into the motor controller so that the motor controller can carry out zero drift compensation on the three-phase current.

4. The vehicle-based motor open-phase detection method according to claim 1, wherein the vehicle further comprises a storage battery, a power battery, and an inverter; the storage battery is used for providing electric quantity for electronic equipment of the vehicle, the power battery is used for providing electric quantity for the motor, and the inverter is used for converting direct current output by the storage battery and the power battery into alternating current;

the detecting whether the vehicle is in a normal running state includes:

detecting whether the vehicle is started, whether a relay of the power battery is closed, whether the voltage of the power battery is larger than a preset voltage, whether the voltage of the storage battery is within a preset voltage range, whether the inverter is in a duty ratio mode and whether the operation parameters of the motor meet preset requirements;

when the vehicle is detected to be in the normal running state, acquiring the three-phase current value of the motor in real time within a preset duration, including:

and after detecting that the vehicle is started, the relay of the power battery is closed, the voltage of the power battery is larger than a preset voltage, the voltage of the storage battery is in a preset voltage range, the inverter is in a duty ratio mode, and the operation parameters of the motor meet preset requirements, acquiring the three-phase current value of the motor in real time within the preset duration.

5. The vehicle-based motor open-phase detection method according to claim 4, wherein detecting whether the operation parameter of the motor satisfies a preset requirement comprises:

Detecting whether the request torque of the motor is larger than a first preset torque threshold value;

Detecting whether the absolute value of the difference between the requested torque and the actual torque of the motor is larger than a second preset torque threshold value;

and when the request torque is detected to be larger than the first preset torque threshold value and the absolute value is detected to be larger than the second preset torque threshold value, judging that the operation parameter of the motor meets the preset requirement.

6. The vehicle-based motor open-phase detection method according to claim 1, wherein the three-phase current values include a W-phase current value, a U-phase current value, and a V-phase current value;

Detecting whether first absolute values of sums of phase current values of any two phases of the three-phase current values are smaller than a first preset threshold value within the preset time period, and detecting whether second absolute values of phase current values of a third phase of the three-phase current values are smaller than a second preset threshold value within the preset time period, includes:

detecting whether absolute values of the sum of the W-phase current value and the V-phase current value are smaller than the first preset threshold value within the preset duration, and detecting whether absolute values of the U-phase current value are smaller than the second preset threshold value within the preset duration;

detecting whether absolute values of the sum of the W-phase current value and the U-phase current value are smaller than the first preset threshold value within the preset duration, and detecting whether absolute values of the V-phase current value are smaller than the second preset threshold value within the preset duration;

Detecting whether absolute values of the sum of the U-phase current value and the V-phase current value are smaller than the first preset threshold value within the preset duration, and detecting whether absolute values of the W-phase current value are smaller than the second preset threshold value within the preset duration.

7. The vehicle-based motor open-phase detection method according to any one of claims 1 to 6, characterized by further comprising, after determining a phase open-phase corresponding to the second absolute value:

And sending motor fault information and controlling the motor to stop running.

8. A vehicle, characterized by comprising: a motor, a motor controller;

the motor is used for providing power for the vehicle;

the motor controller is used for detecting whether the vehicle is in a normal running state or not, and acquiring three-phase current values of the motor in real time within a preset duration when the vehicle is detected to be in the normal running state;

The motor controller is further configured to detect whether first absolute values of sums of phase current values of any two phases of the three-phase current values are all smaller than a first preset threshold value within the preset duration, and detect whether second absolute values of phase current values of a third phase of the three-phase current values are all smaller than a second preset threshold value within the preset duration;

And when the motor controller detects that the first absolute value is smaller than the first preset threshold value in the preset time period and the second absolute value is smaller than the second preset threshold value in the preset time period, determining the phase interruption corresponding to the second absolute value.

9. An electronic device comprising a processor and a memory, the memory for storing instructions, the processor for invoking the instructions in the memory to cause the electronic device to perform the vehicle-based motor open-phase detection method of any one of claims 1-7.

10. A storage medium comprising computer instructions that, when executed on an electronic device, cause the electronic device to perform the vehicle-based motor open-phase detection method of any one of claims 1 to 7.