Open-phase detection method and device, storage medium and air conditioner outdoor unit

Abstract

The invention relates to a default phase detection method and device, a storage medium and an air conditioner outdoor unit. The method comprises the steps that the input voltage of a target motor is obtained; under the condition that the vector angle of the input voltage is a first preset voltage vector angle, obtaining a test current value of a target winding; and under the condition that the test current value of the target winding is smaller than or equal to a first preset current threshold value, determining that the target motor has a multi-phase open-phase fault.

Description

Technical Field

[0001] The present disclosure relates to the field of detection technology, and in particular to a phase loss detection method, device, storage medium and air conditioner outdoor unit. Background Art

[0002] At present, if there is a phase between the motor and the inverter that is not connected or has poor contact, the three-phase motor is likely to malfunction or even be damaged during the startup process. Take the DC variable frequency compressor used in the air conditioner as an example. If there is a phase between the DC variable frequency compressor and the inverter that is not connected or has poor contact, then when the compressor starts, the compressor will lose control due to phase loss and overcurrent will occur. If not protected in time, the compressor rotor magnet will be demagnetized, causing damage to the compressor. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a phase loss detection method, device, storage medium and air conditioner outdoor unit.

[0004] According to a first aspect of an embodiment of the present disclosure, a phase loss detection method is provided, the method comprising:

[0005] Get the input voltage of the target motor;

[0006] When the vector angle of the input voltage is a first preset voltage vector angle, obtaining a test current value of a target winding; the target winding is a winding corresponding to the first preset voltage vector angle;

[0007] When the test current value of the target winding is less than or equal to the first preset current threshold, it is determined that the target motor has a multi-phase loss fault.

[0008] Optionally, the method further comprises:

[0009] When the test current value is greater than the first preset current threshold and the first target test current difference is less than the second preset current threshold, it is determined that the target motor has a first target winding phase loss fault, the first target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the second target winding, and the second preset current threshold is less than the first preset current threshold.

[0010] Optionally, the method further comprises:

[0011] When the vector angle of the input voltage is a second preset voltage vector angle, obtaining a test current value of the first target winding;

[0012] When the test current value of the first target winding is less than or equal to the first preset current threshold, the step of obtaining the test current values ​​of multiple windings of the target motor when the vector angle of the input voltage is the first preset voltage vector angle is executed; and when the test current value of the target winding is less than or equal to the first preset current threshold, determining that the target motor has a multi-phase loss fault.

[0013] Optionally, the method further comprises:

[0014] When the test current value of the first target winding is greater than the first preset current threshold, and the second target test current difference is less than the second preset current threshold, it is determined that the target motor has a second target winding phase failure, and the second target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the first target winding;

[0015] When the test current value of the first target winding is greater than the first preset current threshold and the third target test current difference is less than the second preset current threshold, it is determined that the target motor has a target winding phase failure, and the third target test current difference is the difference between the test current value corresponding to the first target winding and the test current value corresponding to the second target winding.

[0016] Optionally, obtaining a test current value of a target winding includes:

[0017] The test current value of the target winding is collected according to a preset sampling frequency within a preset statistical period.

[0018] Optionally, the method further comprises:

[0019] When it is determined that the target motor does not have a phase failure, the rotor of the target motor is positioned.

[0020] According to a second aspect of an embodiment of the present disclosure, there is provided a phase loss detection device, comprising:

[0021] A first acquisition module is configured to acquire an input voltage of a target motor;

[0022] A second acquisition module is configured to acquire a test current value of a target winding when the vector angle of the input voltage is a first preset voltage vector angle; the target winding is a winding corresponding to the first preset voltage vector angle;

[0023] The determination module is configured to determine that the target motor has a multi-phase loss fault when the test current value of the target winding is less than or equal to a first preset current threshold.

[0024] Optionally, the determination module is also configured to determine that the target motor has a first target winding phase loss fault when the test current value is greater than the first preset current threshold and the first target test current difference is less than a second preset current threshold, the first target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the second target winding, and the second preset current threshold is less than the first preset current threshold.

[0025] Optionally, the device further comprises:

[0026] A third acquisition module is configured to acquire a test current value of the first target winding when the vector angle of the input voltage is a second preset voltage vector angle;

[0027] The execution module is configured to obtain the test current values ​​of multiple windings of the target motor when the vector angle of the input voltage is a first preset voltage vector angle when the test current value of the first target winding is less than or equal to a first preset current threshold; and determine that the target motor has a multi-phase loss fault when the test current value of the target winding is less than or equal to the first preset current threshold.

[0028] Optionally, the device further comprises:

[0029] A first phase loss module is configured to determine that the target motor has a second target winding phase loss fault when a test current value of the first target winding is greater than a first preset current threshold and a second target test current difference is less than a second preset current threshold, and the second target test current difference is a difference between a test current value corresponding to the target winding and a test current value corresponding to the first target winding;

[0030] The second phase loss module is configured to determine that the target motor has a target winding phase loss fault when the test current value of the first target winding is greater than the first preset current threshold and the third target test current difference is less than the second preset current threshold, and the third target test current difference is the difference between the test current value corresponding to the first target winding and the test current value corresponding to the second target winding.

[0031] Optionally, the first acquisition module is configured to collect the test current value of the target winding according to a preset sampling frequency within a preset statistical period.

[0032] Optionally, the device further comprises:

[0033] The positioning module is configured to position the rotor of the target motor when it is determined that the target motor does not have a phase failure.

[0034] According to a third aspect of an embodiment of the present disclosure, a phase loss detection device is provided, comprising: a processor; a memory for storing processor executable instructions; wherein the processor is configured to implement the steps of the phase loss detection method provided by the first aspect of the present disclosure when executed.

[0035] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the phase loss detection method provided in the first aspect of the present disclosure are implemented.

[0036] According to the fifth aspect of the embodiment of the present disclosure, there is provided an air conditioner outdoor unit, comprising the phase loss detection device provided by the third aspect of the present disclosure.

[0037] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0038] By obtaining the input voltage of the target motor; when the vector angle of the input voltage is a first preset voltage vector angle, obtaining the test current value of the target winding; the target winding is the corresponding winding of the first preset voltage vector angle; when the test current value of the target winding is less than or equal to the first preset current threshold, determining that the target motor has a multi-phase phase loss fault. In this way, when the input voltage of the target motor is the first preset voltage vector angle, it can be determined that the target motor has a multi-phase phase loss fault through the test current values ​​of multiple windings before the target motor runs, and the multi-phase circuits of the target motor can be detected simultaneously, thereby improving the detection efficiency of phase loss detection.

[0039] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0041] Figure 1 The figure is a flow chart of a phase loss detection method according to an exemplary embodiment.

[0042] Figure 2 The figure is a flow chart of a phase loss detection method according to an exemplary embodiment.

[0043] Figure 3 The figure is a flow chart of a phase loss detection method according to an exemplary embodiment.

[0044] Figure 4 The figure is a block diagram of a phase loss detection device according to an exemplary embodiment.

[0045] Figure 5 is based on Figure 4 A block diagram of a phase loss detection device is shown in an embodiment.

[0046] Figure 6 is based on Figure 4 A block diagram of a phase loss detection device is shown in an embodiment.

[0047] Figure 7 The figure is a block diagram of a device for detecting phase loss according to an exemplary embodiment. DETAILED DESCRIPTION

[0048] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0049] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0050] First, the application scenario of the present disclosure is introduced. The present disclosure can be applied in the scenario of phase loss detection of the outdoor fan of the air conditioner. At present, if there is a phase between the motor and the inverter that is not connected or in poor contact, the three-phase motor is prone to failure or even damage during the startup process. Take the DC variable frequency compressor used in the air conditioner as an example. If there is a phase between the DC variable frequency compressor and the inverter that is not connected or in poor contact, then when the compressor is started, the compressor will lose control due to phase loss and overcurrent will occur. If it is not protected in time, it will cause the compressor rotor magnet to demagnetize and cause damage to the compressor.

[0051] In the related art, a phase loss fault is detected at the last moment of positioning the external fan, and the current in the rotating coordinate system is detected to determine whether a phase loss fault exists. However, with the above technical solution, after inputting the test voltage, only the current value of one-phase winding can be detected to determine whether the corresponding phase winding has a phase loss fault, and it is impossible to determine whether multiple phase windings of the motor have phase loss faults at the same time.

[0052] In order to solve the above problems, the present disclosure provides a phase loss detection method, device, storage medium and air conditioner outdoor unit. By obtaining the input voltage of the target motor; when the vector angle of the input voltage is a first preset voltage vector angle, obtaining the test current values ​​of multiple windings of the target motor; when the test current value of the target winding is less than or equal to the first preset current threshold, determining that the target motor has a multi-phase phase loss fault. In this way, when the input voltage of the target motor is the first preset voltage vector angle, it can be determined that the target motor has a multi-phase phase loss fault through the test current values ​​of multiple windings before the target motor runs, and the multi-phase circuits of the target motor can be detected simultaneously, thereby improving the detection efficiency of phase loss detection.

[0053] Figure 1 is a flow chart showing a method for detecting a phase loss according to an exemplary embodiment. Figure 1 As shown, the method includes the following steps.

[0054] In step S11 , the input voltage of the target motor is acquired.

[0055] Among them, in the phase loss detection method of the embodiment of the present invention, the outdoor compressor of the air conditioner can be used as an example of a specific three-phase motor. The power supply provides a test current to the compressor through a three-phase inverter before the compressor is started. The control chip, the current detection circuit and the three-phase inverter are respectively connected. When providing the test current to the compressor, the control chip controls the current value of the detection current delivered to the compressor to be less than the starting current value of the compressor. After delivering the detection current to the compressor, the current detection circuit detects the current value in the compressor winding, and the control chip determines whether the compressor is phase-deficient based on the test current value detected by the current detection circuit.

[0056] Optionally, before the three-phase motor is started, the input voltage can be controlled to be transmitted to the target motor, and then the test current value of each phase winding of the target motor can be detected by the current detection circuit, and the test current value of each phase winding can be used to determine whether the target motor has a phase loss fault, and when the target motor has a phase loss fault, the power supply to the target motor can be stopped in time, thereby solving the problem that the prior art method for detecting phase loss of three-phase motors cannot effectively protect the three-phase motors, thereby achieving the effect of improving the timely protection of the three-phase motors.

[0057] For example, a given Ud can be 1 , Uq 1 The voltage of the target motor is taken as the input voltage, where Ud 1 =U,Uq 1 =0,θ 1 = 0°, and within t-2t time, Ud will be given 2 , Uq2 The voltage of the target motor is taken as the input voltage, where Ud 2 =U,Uq 2 =0,θ 2 =120°.

[0058] In some embodiments, the test current value of each phase winding of the target motor is collected according to a preset sampling frequency within a preset statistical period.

[0059] In step S12, when the vector angle of the input voltage is a first preset voltage vector angle, a test current value of the target winding is obtained.

[0060] The first preset voltage vector angle includes θ=120°. The test current value target winding is a winding corresponding to the first preset voltage vector angle of the test current value.

[0061] In this step, it is firstly determined that the vector angle of the input voltage is a first preset voltage vector angle, and when the vector angle of the input voltage is the first preset voltage vector angle, the test current value of the target winding is obtained.

[0062] Optionally, when the vector angle of the input voltage of the target motor is determined to be the first preset voltage vector angle, that is, 120°, the input voltage of the target motor can be determined to be Ud 2 =U,Uq 2 =0; then the test current value of each phase winding of the target motor can be detected by the current detection circuit, and then the input voltage of the target motor is Ud 2 =U,Uq 2 =0, the b-phase winding of the target motor can be designated as the target winding.

[0063] In step S13, when the test current value of the target winding is less than or equal to the first preset current threshold, it is determined that the target motor has a multi-phase loss fault.

[0064] By obtaining the input voltage of the target motor; when the vector angle of the input voltage is a first preset voltage vector angle, obtaining the test current value of the target winding; when the test current value of the target winding is less than or equal to the first preset current threshold, determining that the target motor has a multi-phase phase loss fault. In this way, when the input voltage of the target motor is the first preset voltage vector angle, it can be determined that the target motor has a multi-phase phase loss fault through the test current values ​​of multiple windings before the target motor runs, and the multi-phase circuits of the target motor can be detected simultaneously, thereby improving the detection efficiency of phase loss detection.

[0065] In some embodiments, when the test current value is less than or equal to a first preset current threshold, it is determined that the target motor has a multi-phase loss fault.

[0066] When the vector angle of the input voltage of the target motor is determined to be the first preset voltage vector angle, that is, 120°, the input voltage of the target motor can be determined to be Ud 2 =U,Uq 2 =0; then the test current value of each phase winding of the target motor can be detected by the current detection circuit, and then the input voltage of the target motor is Ud 2 =U,Uq 2 =0, the b-phase winding of the target motor can be designated as the target winding.

[0067] It should be noted that Ud and Uq are the voltages of the motor in a rotating coordinate system, Uα and Uβ are the voltages in a two-phase stationary coordinate system, and Ua, Ub, and Uc are the phase voltages of the motor in a three-phase stationary coordinate system.

[0068] Among them, the relationship between Ud, Uq to Uα, Uβ is:

[0069] Uα = Ud·cosθ - Uq·sinθ; (1)

[0070] Uβ = Ud·sinθ+ Uq·cosθ; (2)

[0071] The relationship between Uα, Uβ and Ua, Ub, Uc is:

[0072] Ua = Uα; (3)

[0073]

[0074]

[0075] For example, according to the above coordinate transformation formulas (1)-(5), when the input voltage of the target motor is Ud 2 =U,Uq 2 =0,θ 2 =120°, the voltages of Ua, Ub, and Uc are:

[0076] Ua=-U / 2;

[0077] Ub=U;

[0078] Uc=-U / 2.

[0079] Among them, the phase voltage of the motor can be equivalent to: Ua, Ub, Uc, the impedance of the three-phase winding of the motor is the same, then the relationship between the phase currents ia, ib, ic of the motor in this state can be expressed as: |ib|=2|ia|=2|ic|. The three-phase current of the fan is detected in real time, and the average values ​​of the absolute values ​​of the currents iac, ibc, icc during this period of time are calculated. When the test current value ibc is less than or equal to the first preset current threshold value A0, it can be determined that the target motor has a multi-phase phase failure.

[0080] By adopting the above technical solution, when the test current value is less than or equal to the first preset current threshold, it can be determined that the target motor has a multi-phase loss fault.

[0081] In some embodiments, when the test current value is greater than the first preset current threshold and the first target test current difference is less than the second preset current threshold, it is determined that the target motor has a first target winding phase loss fault.

[0082] The first target test current difference is a difference between a test current value corresponding to the target winding and a test current value corresponding to the second target winding, and the second preset current threshold is less than the first preset current threshold.

[0083] For example, when the test current value ibc is greater than the first preset current threshold A0, and the first target test current difference is the absolute value of the difference between the test current value corresponding to the target winding and the test current value corresponding to the second target winding, and |ibc-icc| is less than the second preset current threshold A1, it can be determined that the first target winding A phase winding has a phase loss fault.

[0084] By adopting the above technical solution, when it is determined that the test current value is greater than the first preset current threshold and the first target test current difference is less than the second preset current threshold, it is determined that the target motor has a first target winding phase loss fault.

[0085] In some embodiments, Figure 2 As shown, the method also includes:

[0086] In step S14, when the vector angle of the input voltage is a second preset voltage vector angle, a test current value of the first target winding is obtained.

[0087] In this step, after obtaining the input voltage of the target motor, it can be first determined whether the vector angle of the input voltage is a second preset voltage vector angle, and when the vector angle of the input voltage is the second preset voltage vector angle, the test current value of the first target winding is obtained.

[0088] For example, when the vector angle of the input voltage of the target motor is determined to be the second preset voltage vector angle, that is, 0°, the input voltage of the target motor can be determined to be Ud 1 =U,Uq 1 =0; then the test current value of each phase winding of the target motor can be detected by the current detection circuit.

[0089] In step S15, it is determined that the test current value of the first target winding is less than or equal to the first preset current threshold value, and then the test current value of the target winding is obtained when the vector angle of the input voltage is the first preset voltage vector angle; and when the test current value of the target winding is less than or equal to the first preset current threshold value, it is determined that the target motor has a multi-phase loss fault.

[0090] In some embodiments, Figure 3 As shown, the method also includes:

[0091] In step S16, when the test current value of the first target winding is greater than the first preset current threshold and the second target test current difference is less than the second preset current threshold, it is determined that the target motor has a second target winding phase loss fault.

[0092] The second target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the first target winding.

[0093] For example, according to the above coordinate transformation formulas (1)-(5), when the input voltage of the target motor is Ud 1 =U,Uq 1 =0,θ 1 =0°, the voltages of Ua, Ub, and Uc are:

[0094] Ua=U;

[0095] Ub=-U / 2;

[0096] Uc=-U / 2.

[0097] Among them, the phase voltage of the motor can be equivalent to: Ua, Ub, Uc, the impedance of the three-phase winding of the motor is the same, so the relationship between the phase currents ia, ib, ic of the motor in this state can be expressed as: |ib|=2|ia|=2|ic|. The three-phase current of the motor is detected in real time, and the average values ​​of the absolute values ​​of the currents of each phase during this period of time, iac, ibc, icc, are calculated. When the first target test current value iac is greater than the first preset current threshold value A0, and the second target test current difference is the absolute value of the difference between the test current value corresponding to the target winding and the test current value corresponding to the first target winding, and |iac-ibc| is less than the second preset current threshold value A1, it is determined that the target motor has a phase loss fault in the second target winding C phase.

[0098] In step S17, when the test current value of the first target winding is greater than the first preset current threshold and the third target test current difference is less than the second preset current threshold, it is determined that the target motor has a target winding phase loss fault.

[0099] The third target test current difference is a difference between a test current value corresponding to the first target winding and a test current value corresponding to the second target winding.

[0100] For example, when the first target test current value iac is greater than the first preset current threshold A0, and the third target test current difference is the absolute value of the difference between the test current value corresponding to the first target winding and the test current value corresponding to the second target winding, and |iac-icc| is less than the second preset current threshold A1, it is determined that the target motor has a phase loss fault in the target winding B phase.

[0101] By adopting the above technical solution, it is possible to determine whether each phase of the three-phase motor has a phase failure.

[0102] In some embodiments, the rotor of the target motor may be positioned when it is determined that the target motor does not have a phase loss fault.

[0103] Figure 4 is a block diagram of a phase loss detection device according to an exemplary embodiment. Figure 4 The device includes a first acquisition module 401, a second acquisition module 402 and a determination module 403.

[0104] A first acquisition module 401 is configured to acquire an input voltage of a target motor;

[0105] The second acquisition module 402 is configured to acquire a test current value of a target winding when the vector angle of the input voltage is a first preset voltage vector angle; the test current value target winding is a winding corresponding to the first preset voltage vector angle of the test current value;

[0106] The determination module 403 is configured to determine that the target motor has a multi-phase loss fault when the test current value of the target winding is less than or equal to a first preset current threshold.

[0107] Optionally, the determination module 403 is also configured to determine that the target motor has a first target winding phase loss fault when the test current value is greater than the first preset current threshold and the first target test current difference is less than a second preset current threshold, the first target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the second target winding, and the second preset current threshold is less than the first preset current threshold.

[0108] Figure 5 is based on Figure 4 A block diagram of a phase failure detection device is shown in the embodiment. Figure 5 , the device further comprises:

[0109] The third acquisition module 405 is configured to acquire the test current value of the first target winding when the vector angle of the input voltage is a second preset voltage vector angle; and when the test current value of the first target winding is less than or equal to a first preset current threshold, execute the step of acquiring the test current values ​​of multiple windings of the target motor when the vector angle of the input voltage is the first preset voltage vector angle; and when the test current value of the target winding is less than or equal to the first preset current threshold, determine that the target motor has a multi-phase loss fault.

[0110] Figure 6 is based on Figure 4 A block diagram of a phase failure detection device is shown in the embodiment. Figure 6 , the device further comprises:

[0111] The first phase loss module 406 is configured to determine that the target motor has a second target winding phase loss fault when the test current value of the first target winding is greater than a first preset current threshold and the second target test current difference is less than a second preset current threshold, and the second target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the first target winding;

[0112] The second phase loss module 407 is configured to determine that the target motor has a target winding phase loss fault when the test current value of the first target winding is greater than the first preset current threshold and the third target test current difference is less than the second preset current threshold, and the third target test current difference is the difference between the test current value corresponding to the first target winding and the test current value corresponding to the second target winding.

[0113] Optionally, the first acquisition module 401 is configured to collect the test current value of each phase winding of the target motor according to a preset sampling frequency within a preset statistical period.

[0114] Optionally, the test current value device is also used to position the rotor of the test current value target motor when it is determined that the test current value target motor does not have a phase loss fault.

[0115] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0116] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and when the program instructions are executed by a processor, the steps of the phase loss detection method provided by the present disclosure are implemented.

[0117] The present disclosure also provides an air conditioner outdoor unit, comprising the phase loss detection device provided by the present disclosure.

[0118] Figure 7 is a block diagram of a device 700 for phase loss detection according to an exemplary embodiment. For example, the device 700 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0119] Reference Figure 7 , the device 700 may include one or more of the following components: a processing component 702 , a memory 704 , a power component 706 , a multimedia component 708 , an audio component 710 , an input / output interface 712 , a sensor component 714 , and a communication component 716 .

[0120] The processing component 702 generally controls the overall operation of the device 700, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 702 may include one or more processors 720 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 702 may include one or more modules to facilitate the interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate the interaction between the multimedia component 708 and the processing component 702.

[0121] The memory 704 is configured to store various types of data to support operations on the device 700. Examples of such data include instructions for any application or method operating on the device 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0122] The power supply component 706 provides power to the various components of the device 700. The power supply component 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 700.

[0123] The multimedia component 708 includes a screen that provides an output interface between the device 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 708 includes a front camera and / or a rear camera. When the device 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0124] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC), and when the device 700 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 704 or sent via the communication component 716. In some embodiments, the audio component 710 also includes a speaker for outputting audio signals.

[0125] The input / output interface 712 provides an interface between the processing component 702 and the peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0126] The sensor assembly 714 includes one or more sensors for providing various aspects of status assessment for the device 700. For example, the sensor assembly 714 can detect the open / closed state of the device 700, the relative positioning of components, such as the display and keypad of the device 700, the sensor assembly 714 can also detect the position change of the device 700 or a component of the device 700, the presence or absence of user contact with the device 700, the orientation or acceleration / deceleration of the device 700, and the temperature change of the device 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 714 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0127] The communication component 716 is configured to facilitate wired or wireless communication between the device 700 and other devices. The device 700 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0128] In an exemplary embodiment, the apparatus 700 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above methods.

[0129] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 704 including instructions, and the instructions can be executed by the processor 720 of the device 700 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0130] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0131] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A phase loss detection method, characterized in that: The method comprises: Get the input voltage of the target motor; When the vector angle of the input voltage is a first preset voltage vector angle, obtaining a test current value of a target winding; the target winding is a winding corresponding to the first preset voltage vector angle; When the test current value of the target winding is less than or equal to the first preset current threshold, it is determined that the target motor has a multi-phase loss fault.

2. The method according to claim 1, characterized in that: The method further comprises: When the test current value is greater than the first preset current threshold and the first target test current difference is less than the second preset current threshold, it is determined that the target motor has a first target winding phase loss fault, the first target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the second target winding, and the second preset current threshold is less than the first preset current threshold.

3. The method according to claim 1, characterized in that: The method further comprises: When the vector angle of the input voltage is a second preset voltage vector angle, obtaining a test current value of the first target winding; When the test current value of the first target winding is less than or equal to the first preset current threshold, the step of obtaining the test current values ​​of multiple windings of the target motor when the vector angle of the input voltage is the first preset voltage vector angle is executed; and when the test current value of the target winding is less than or equal to the first preset current threshold, determining that the target motor has a multi-phase loss fault.

4. The method according to claim 3, characterized in that: The method further comprises: When the test current value of the first target winding is greater than the first preset current threshold, and the second target test current difference is less than the second preset current threshold, it is determined that the target motor has a second target winding phase failure, and the second target test current difference is the difference between the test current value corresponding to the target winding and the test current value corresponding to the first target winding; When the test current value of the first target winding is greater than the first preset current threshold and the third target test current difference is less than the second preset current threshold, it is determined that the target motor has a target winding phase failure, and the third target test current difference is the difference between the test current value corresponding to the first target winding and the test current value corresponding to the second target winding.

5. The method according to claim 1, characterized in that The obtaining of the test current value of the target winding comprises: The test current value of the target winding is collected according to a preset sampling frequency within a preset statistical period.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: When it is determined that the target motor does not have a phase failure, the rotor of the target motor is positioned.

7. A phase loss detection device, characterized in that: include: A first acquisition module is configured to acquire an input voltage of a target motor; A second acquisition module is configured to acquire a test current value of a target winding when the vector angle of the input voltage is a first preset voltage vector angle; The target winding is a winding corresponding to the first preset voltage vector angle; The determination module is configured to determine that the target motor has a multi-phase loss fault when the test current value of the target winding is less than or equal to a first preset current threshold.

8. A phase loss detection device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to implement the steps of the method according to any one of claims 1 to 7 when executed.

9. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 6 are implemented.

10. An air conditioner outdoor unit, characterized in that: It includes the phase loss detection device shown in claim 8.

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