WO2019072044A1 - Procédé et appareil de détection de perte de phase de moteur, et dispositif électronique - Google Patents

Procédé et appareil de détection de perte de phase de moteur, et dispositif électronique Download PDF

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Publication number
WO2019072044A1
WO2019072044A1 PCT/CN2018/103004 CN2018103004W WO2019072044A1 WO 2019072044 A1 WO2019072044 A1 WO 2019072044A1 CN 2018103004 W CN2018103004 W CN 2018103004W WO 2019072044 A1 WO2019072044 A1 WO 2019072044A1
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Prior art keywords
current
motor
control current
sampling
phase
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PCT/CN2018/103004
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English (en)
Chinese (zh)
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陈毅东
范晓生
林楚翔
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深圳市道通智能航空技术有限公司
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Publication of WO2019072044A1 publication Critical patent/WO2019072044A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/16—Measuring asymmetry of polyphase networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines

Definitions

  • the embodiments of the present invention relate to the technical field of motors, and in particular, to a method, a device, and an electronic device for detecting a phase loss of a motor.
  • the motor is an important part of the power system of the drone. Therefore, the fault detection of the motor is an indispensable part of ensuring the safe flight of the drone.
  • the phase loss detection of the control current of the motor is particularly important.
  • the motor has a phase loss of control current, there may be problems such as motor jitter, normal operation, weak rotation, reduced load capacity, and high noise. More serious, it may even cause the motor to be short-circuited, and the current is too large. The motor generates too much heat and burns the motor. These will seriously affect the flight safety of the drone.
  • the waveform of the multi-phase control current controlled by the FOC algorithm should be a sine wave under ideal conditions, but the waveform of the control current obtained by actual sampling is affected by the non-inductive control.
  • the sinusoidal degree is poor, and there are many distortion points, which may cause misjudgment of the motor phase loss.
  • the sine wave itself has multiple times when the current value is zero/near zero, and it is easy to perform the phase loss detection. The current value collected at these moments is misjudged as the current phase loss occurs. The misjudgment of the motor phase loss will also affect the performance of the drone.
  • the embodiment of the present application provides a method, a device, and an electronic device for detecting a phase loss of a motor, which can solve the problem of how to accurately determine whether a motor has a phase loss.
  • an embodiment of the present application provides a motor phase loss detection method, including:
  • a current threshold Y1, a sampling frequency f, and a sampling number N1 corresponding to a current control current of the motor wherein the control current includes at least a three-phase control current in an ideal state, the current threshold Y1 being an ideal control current of the motor
  • Each phase control current of the motor is continuously sampled N1 times according to the sampling frequency f, and N1 current values of each phase control current are obtained;
  • the determining the current threshold Y1, the sampling frequency f, and the sampling number N1 corresponding to the current control current of the motor includes:
  • the sampling current waveform corresponding to the current control current of the motor is determined in combination with the reference current waveform, the current threshold Y1, and the sampling frequency f.
  • the obtaining an ideal control current waveform of the motor includes:
  • the obtaining an ideal control current waveform of the motor includes:
  • the determining the sampling number N1 corresponding to the current control current of the motor by using the reference current waveform, the current threshold Y1, and the sampling frequency f includes:
  • the value of a ranges from 10% ⁇ a ⁇ 25%.
  • the N1 ⁇ 1.2N0.
  • the motor phase loss detecting method further comprises: powering off the motor when it is determined that the motor currently lacks at least one phase control current.
  • an embodiment of the present application provides a motor phase loss detecting device, including:
  • the number of sampling times N0 sampled at the sampling frequency f within the shortest time difference t0 between the sampling points of Y1;
  • a sampling unit configured to continuously sample N1 times of each phase control current of the motor according to the sampling frequency f, to obtain N1 current values of each phase control current
  • a calculating unit configured to average an absolute value of the N1 current values of each phase control current, and obtain a sample average value of the control current of each phase;
  • an analyzing unit configured to determine that the motor currently lacks at least one phase control current if a sample average value of any phase control current is less than the current threshold Y1.
  • the parameter determining unit includes:
  • An ideal current waveform acquisition module for acquiring an ideal control current waveform of the motor
  • An ideal current waveform processing module configured to take an absolute value of a current value in the ideal control current waveform to obtain a reference current waveform of the motor
  • a sampling update period acquisition module configured to acquire a sampling frequency f corresponding to a current control current of the motor
  • the sampling number determining module is configured to determine the sampling number N1 corresponding to the current control current of the motor in combination with the reference current waveform, the current threshold Y1, and the sampling frequency f.
  • the ideal current waveform acquisition module is specifically configured to:
  • the ideal current waveform acquisition module is specifically configured to:
  • sampling times determining module is specifically configured to:
  • the value of a ranges from 10% ⁇ a ⁇ 25%.
  • the N1 ⁇ 1.2N0.
  • the motor phase loss detecting device further includes:
  • a power-off unit configured to power off the motor when it is determined that the motor currently lacks at least one phase control current.
  • an electronic device including:
  • At least one processor and,
  • the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform a motor phase loss detection method as described above.
  • the embodiment of the present application further provides a non-transitory computer readable storage medium, where the non-transitory computer readable storage medium stores computer executable instructions for causing an electronic device The motor phase loss detection method as described above is performed.
  • the embodiment of the present application further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program When the instructions are executed by the electronic device, the electronic device is caused to perform the motor phase loss detection method as described above.
  • the motor phase loss detecting method, device and electronic device provided by the embodiment of the present application first determine the sampling frequency f corresponding to the current control current of the motor, and based on the motor
  • the ideal control current waveform determines the current threshold Y1 corresponding to the current control current of the motor and the sampling number N1; then, each phase control current of the motor is continuously sampled N1 times according to the sampling frequency f, and N1 of each phase control current is obtained.
  • FIG. 1 is a schematic flow chart of a motor phase loss detecting method according to an embodiment of the present application
  • FIG. 2 is a schematic diagram showing an example of an ideal control current waveform provided by an embodiment of the present application
  • FIG. 3 is a schematic flow chart of a method for determining a current threshold Y1, a sampling frequency f, and a sampling number N1 corresponding to a current control current of a motor according to an embodiment of the present application;
  • FIG. 4 is a schematic diagram showing an example of a reference current waveform corresponding to the ideal control current waveform shown in FIG. 2;
  • FIG. 5 is a schematic structural diagram of a motor phase loss detecting device according to an embodiment of the present application.
  • FIG. 6 is a schematic structural view of a parameter determining unit of the motor phase loss detecting device shown in FIG. 5;
  • FIG. 7 is a schematic structural diagram of hardware of an electronic device according to an embodiment of the present application.
  • the motor phase loss detecting method provided by the embodiment of the present application is capable of effectively avoiding phase loss misjudgment in the case where the waveform of the control current of the motor obtained by actual sampling is deviated from the waveform of the ideal control current of the motor.
  • the detection method can be applied to control currents of arbitrary waveform types, such as square wave type control current, sine wave type control current, etc., and is especially suitable for sinusoidal type control current generated based on Field Oriental Control (FOC) algorithm. .
  • FOC Field Oriental Control
  • the phase loss detection method of the multiphase sinusoidal type control current generated by the FOC algorithm is taken as an example, and the motor phase loss detection method provided by the embodiment of the present application is described in detail.
  • the motor phase loss detection method provided by the embodiment of the present application can be performed by any type of electronic device, such as a micro processor, a flight control device of a drone, and the like.
  • the electronic device can include any suitable type of storage medium for storing data, such as a magnetic disk, a compact disc (CD-ROM), a read-only memory or a random access memory.
  • the electronic device may also include one or more logic operation modules that perform any suitable type of function or operation in parallel, such as acquiring sampled data of the control current to the motor, performing data analysis, transmitting control signals, and the like.
  • the logic operation module may be any suitable type of electronic circuit or chip-type electronic device capable of performing logical operation operations, such as a single core processor, a multi-core processor, a graphics processing unit (GPU), or the like.
  • FIG. 1 is a schematic flow chart of a motor phase loss detecting method according to an embodiment of the present application. Referring to FIG. 1, the method may include, but is not limited to, the following steps:
  • control current refers to a current applied to each phase winding of the motor for controlling the rotation of the motor.
  • control current includes at least three-phase control current.
  • the "current control current of the motor” refers to the control current of the current operating state of the motor (or at the current rotational speed of the motor).
  • the control current may be a sinusoidal type control current generated by the FOC algorithm.
  • the waveform of each phase control current of the motor may be a standard sine wave as shown in FIG. 2 .
  • the “sampling frequency f” refers to a frequency at which the current control current of the motor is sampled, and the value can be set by the developer according to the actual application scenario.
  • a fixed sampling frequency f can be set.
  • different sampling frequencies f may be set corresponding to different motor operating states, which are not specifically limited in this embodiment of the present application.
  • the "sampling number N1" refers to the number of times the current control current of the motor is sampled in accordance with the determined sampling frequency f.
  • the sampling number N1 is larger than the number N0 of sampling at the sampling frequency f within the shortest time difference t0 between the sampling points where the absolute value of the current value in the ideal control current waveform of the motor is Y1.
  • the sampling points whose absolute value of the current value is Y1 include: sampling point 1, sampling point 2, sampling point. 3.
  • Sample point 4, sample point 5 and sample point 6, wherein the time difference between sample point 2 and sample point 3 (or sample point 4 and sample point 5) is the shortest, then sample point 2 and sample point 3 (or The time difference between the sampling point 4 and the sampling point 5) is the "shortest time difference t0", and the number N0 of sampling at the sampling frequency f within the shortest time difference t0 can be obtained by the formula N0 f*t0.
  • the motor is received at any one time (for example, may reach a preset time node for detecting the phase loss of the motor, or may be when the electronic device detects a certain sudden condition).
  • the detection command of the phase loss detection is performed, first, the current threshold value Y1, the sampling frequency f, and the sampling frequency N1 corresponding to the current control current of the motor are determined.
  • the specific implementation manner of determining the current threshold Y1, the sampling frequency f, and the sampling number N1 corresponding to the current control current of the motor may be: pre-storing the current threshold Y1, the sampling frequency f, and the sampling times corresponding to the control current in each operating state of the motor.
  • the current running state of the motor can be obtained according to the detection instruction, and then the current threshold Y1, the sampling frequency f and the sampling number N1 corresponding to the current control current of the motor are determined according to the current operating state of the motor.
  • the current threshold value Y1, the sampling frequency f, and the sampling number N1 corresponding to the current control current of the motor may also be determined by the method shown in FIG. 3.
  • the method may include but is not limited to the following steps:
  • an ideal control current waveform of the motor (as shown in FIG. 2) can be acquired upon receiving a detection command for phase loss detection of the motor.
  • the influence of the non-inductive control of the FOC algorithm makes it difficult to ensure that the motor's control current waveform has a good sinusoidality at the lowest speed, that is, the motor is controlled at the lowest speed.
  • the distortion of the current waveform is the largest, and it is most likely to cause misjudgment of the motor phase loss detection.
  • the current amplitude of the ideal control current corresponding to the motor at the minimum rotational speed is smaller than the current amplitude of the corresponding ideal control current at the other rotational speed, and therefore, determined based on the current amplitude of the corresponding ideal control current waveform at the minimum rotational speed of the motor.
  • the ideal control current waveform may be an ideal control current waveform corresponding to the motor running at the minimum speed.
  • the specific implementation of the step 111 may be: corresponding ideal control when acquiring the minimum motor speed. Current waveform.
  • the ideal control current waveform may also be an ideal control current waveform corresponding to the current rotational speed of the motor.
  • the specific implementation of this step 111 may also be: acquiring the current current motor. The rotational speed is then obtained as an ideal control current waveform corresponding to the rotational speed.
  • the correspondence between the motor speed and its ideal control current waveform can be preset in the electronic device, so that the ideal control current waveform at the current motor speed can be obtained according to the acquired rotational speed.
  • the current amplitude Y max is the maximum value of the ideal control current waveform.
  • the current value in the ideal control current waveform obtained in step 111 is taken as an absolute value, so that the reference current waveform as shown in FIG. 4 can be obtained.
  • the sampling frequency f can be stored in advance in the memory of the electronic device, and when the motor phase loss detection is performed, it can be directly read and obtained in the corresponding position in the memory. Further, in the present embodiment, the same sampling frequency f is employed in sampling the ideal control current waveform of the motor and the current control current of the motor.
  • step 112 is performed first, step 113 is performed, and step 112 is performed first, and step 113 is performed first.
  • step 112 is performed at the end of step 112, etc.; alternatively, steps 112, 113, and 114 described above may also be performed simultaneously.
  • the shortest time difference t0 between the sampling points of the nearest two current values Y1 in the reference current waveform may be first acquired (see FIG. 4); and then the shortest time difference t0 is obtained.
  • N1 ⁇ 1.2N0 can be taken.
  • the current control current of each phase of the motor is continuously sampled N1 times according to the sampling frequency f, and N1 current values of the control current of each phase are obtained.
  • control current of each phase of the motor can be continuously sampled N1 times according to the sampling frequency f with any one time as the starting time, so that N1 samples are sampled for each phase control current of the motor.
  • the current value of the point For example, for the A phase control current sampling of the motor, the current values A 1 , A 2 , ..., A N1 are obtained ; for the B phase control current sampling of the motor, the current values B 1 , B 2 , ..., B N1 are obtained ; for the motor C Phase control current sampling yields current values C 1 , C 2 , ..., C N1 , and so on.
  • the absolute values of the N1 current values of the respective phase control currents are averaged, and the control current of each phase is obtained.
  • Sample average For example, the average sampled current of phase A control current is The sampled average of the B-phase control current is The sampled average of the C-phase control current is
  • the phase loss of three-phase or other multi-phase motors that is, the currents loaded on the various windings of the motor, lacks one phase or multiple phases.
  • the lack of one phase or multiple phases of the current is essentially the absence of one or more phase control currents in the control current of the motor, ie, the current value of the phase-deficient control current is always zero.
  • the current threshold Y1 is much smaller than the maximum current value of the current control current of the motor, and the sampling number N1 is greater than the shortest time difference t0 between the sampling points where the absolute value of the current value in the ideal control current waveform of the motor is Y1.
  • the number of times of sampling with the sampling frequency f is N0; then, in the case where the motor does not have a phase loss, the value after accumulating the absolute value of the current value obtained by sampling N1 (N1>N0) should not be less than the cumulative value of N0 times. a value less than the absolute value of the current value of Y1; thus, it is conceivable that the current threshold Y1 is sufficiently small compared to the maximum value of the current control current of the motor, and when N1 is sufficiently large compared with N0, if the motor does not exist Phase, the sampling average of any phase control current of the motor should be greater than or equal to the current threshold Y1.
  • determining whether the motor is out of phase based on the absolute value of the current value of the plurality of sampling points is less affected by the distortion of the actual control current waveform of the motor, and is not caused by the sine wave. There are multiple times when the current value is 0 or close to 0, resulting in phase loss misjudgment.
  • the beneficial effect of the embodiment of the present application is that the motor phase loss detecting method provided by the embodiment of the present application first determines the sampling frequency f corresponding to the current control current of the motor, and determines the motor based on the ideal control current waveform of the motor.
  • each phase control current of the motor is continuously sampled N1 times according to the sampling frequency f, and N1 current values of each phase control current are obtained;
  • the absolute values of the N1 current values of each phase control current are averaged, and the sample average value of the control current of each phase is obtained; finally, by comparing the sample average value of each phase control current with the current threshold Y1
  • the phase loss misjudgment can be effectively avoided, and the accuracy of the motor phase loss detection is improved.
  • the processing is simple and not easy to make mistakes.
  • the motor phase loss detection method provided by the implementation of the present application may be further extended according to a specific application scenario.
  • protection measures for powering off the motor may be taken.
  • the method for detecting the phase loss of the motor may further include: if it is determined that the motor currently lacks at least one phase control current, an alarm signal is issued to prompt the flight controller to The motor of the machine is running abnormally.
  • the alarm signal may be an alarm sound, or may be a blinking indicator, which is not specifically limited in this embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a motor phase loss detecting device according to an embodiment of the present invention.
  • the motor phase loss detecting device 50 can implement the motor phase loss detecting method provided by the foregoing method embodiment. Referring to FIG. 5, the motor is missing.
  • the phase detecting device 50 includes a parameter determining unit 51, a sampling unit 52, a calculating unit 53, and an analyzing unit 54.
  • the parameter determining unit 51 is configured to determine a current threshold Y1, a sampling frequency f, and a sampling number N1 corresponding to a current control current of the motor.
  • the value of a ranges from: 10% ⁇ a ⁇ 25%, and/or, the N1 ⁇ 1.2N0.
  • the sampling unit 52 is configured to continuously sample N1 times of each phase control current of the motor according to the sampling frequency f, and obtain N1 current values of each phase control current.
  • the calculation unit 53 is configured to average the absolute values of the N1 current values of the control currents of each phase, and obtain a sample average value of the control currents of each phase.
  • the analyzing unit 54 is configured to determine that the motor currently lacks at least one phase control current if the sampling average value of any phase control current is less than the current threshold Y1.
  • the current threshold value Y1, the sampling frequency f, and the sampling frequency N1 corresponding to the current control current of the motor may be first determined by the parameter determining unit 51; then, the sampling current is controlled by the sampling unit 52 for each phase of the motor according to the sampling frequency. f consecutively sampling N1 times, obtaining N1 current values of each phase control current; and averaging the absolute values of the N1 current values of each phase control current by the calculating unit 53, respectively, obtaining each of the phases Controlling the average value of the current; finally, the average value of the sampling of each phase control current is compared with the current threshold Y1 by the analyzing unit 54. If the sampling average of any phase control current is less than the current threshold Y1, then It is determined that the motor currently lacks at least one phase control current.
  • the parameter determining unit 51 includes: an ideal current waveform acquiring module 511, an ideal current waveform processing module 512, a current threshold determining module 513, a sampling update period acquiring module 514, and sampling times.
  • the module 515 is determined.
  • the ideal current waveform acquisition module 511 is configured to acquire an ideal control current waveform of the motor. Specifically, in some embodiments, the ideal current waveform acquisition module 511 is specifically configured to: acquire an ideal control current waveform corresponding to a minimum motor speed. Alternatively, in other embodiments, the ideal current waveform acquisition module 511 is specifically configured to: acquire a current rotational speed of the motor; and obtain an ideal control current waveform corresponding to the rotational speed.
  • the ideal current waveform processing module 512 is configured to obtain an absolute value of the current value in the ideal control current waveform to obtain a reference current waveform of the motor.
  • the sampling update period obtaining module 514 is configured to acquire a sampling frequency f corresponding to a current control current of the motor.
  • the sampling number determining module 515 is configured to determine the sampling number N1 corresponding to the current control current of the motor in combination with the reference current waveform, the current threshold Y1, and the sampling frequency f. Specifically, in some embodiments, the sampling times determining module 515 is specifically configured to: acquire a shortest time difference t0 between sampling points of two nearest current values in the reference current waveform, and obtain the shortest time difference t0 The number of reference samples N0 sampled by the sampling frequency f; the number of sampling times N1 corresponding to the current control current of the motor is determined according to the reference sampling number N0, where N1>N0.
  • the motor phase loss detecting device 50 may further include a power-off unit 55 configured to perform the motor when it is determined that the motor currently lacks at least one phase control current. Power off.
  • the motor phase loss detecting device provided by the embodiment of the present application first determines the current threshold Y1, the sampling frequency f, and the sampling corresponding to the current control current of the motor by the parameter determining unit 51. The number of times N1; then, using the sampling unit 52, each phase control current of the motor is continuously sampled N1 times according to the sampling frequency f to obtain N1 current values of each phase control current; and each of the respective units is respectively calculated by the calculating unit 53 The absolute values of the N1 current values of the phase control current are averaged to obtain a sample average value of the control current of each phase; finally, the average value of the sampling current of each phase is compared with the current threshold Y1 by the analyzing unit 54.
  • the sampling average value of any phase control current is less than the current threshold Y1
  • FIG. 7 is a schematic diagram showing the hardware structure of an electronic device for performing the motor phase loss detecting method according to the embodiment of the present application.
  • the electronic device 700 includes:
  • processors 710 and memory 720 one processor 710 is taken as an example in FIG.
  • the processor 710 and the memory 720 may be connected by a bus or other means, as exemplified by a bus connection in FIG.
  • the memory 720 is used as a non-transitory computer readable storage medium, and can be used for storing a non-volatile software program, a non-volatile computer executable program, and a module, such as a program corresponding to the motor phase loss detecting method in the embodiment of the present application.
  • An instruction/module (for example, the parameter determination unit 51, the sampling unit 52, the calculation unit 53, the analysis unit 54, and the power-off unit 55 shown in FIG. 5).
  • the processor 710 executes various functional applications and data processing of the electronic device 700 by running non-volatile software programs, instructions, and modules stored in the memory 720, that is, the motor phase loss detecting method of the above method embodiment.
  • the memory 720 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to use of the motor phase loss detecting means, and the like.
  • memory 720 can include high speed random access memory, and can also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device.
  • memory 720 can optionally include memory remotely located relative to processor 710, which can be connected to electronic device 700 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • the one or more modules are stored in the memory 720, and when executed by the one or more processors 710, perform a motor phase loss detection method in any of the above method embodiments, for example, performing the above described diagram Method steps 110 through 140 in FIG. 1, method steps 111 through 115 in FIG. 2, implement the functions of units 51-55 in FIG. 5, and implement the functions of modules 511-515 in FIG.
  • the embodiment of the present application further provides a non-transitory computer readable storage medium storing computer executable instructions executed by one or more processors, for example, Executed by a processor 710 in FIG. 7, the one or more processors may be configured to perform the motor phase loss detection method in any of the above method embodiments, for example, to perform the method step 110 in FIG. 1 described above.
  • Step 140, method step 111 to step 115 in FIG. 2 implements the functions of units 51-55 in FIG. 5, and implements the functions of modules 511-515 in FIG.
  • An embodiment of the present application provides a computer program product, including a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by an electronic device,
  • the electronic device performs the motor phase loss detecting method in any of the above method embodiments, for example, performing the method steps 110 to 140 in FIG. 1 described above, and the method steps 111 to 115 in FIG. 2, implementing the unit in FIG.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

L'invention concerne un procédé de détection d'une perte de phase d'un moteur, comprenant : la détermination d'un seuil de courant Y1, d'une fréquence d'échantillonnage f et du nombre N1 d'échantillonnages qui correspondent au courant de commande de courant d'un moteur (110) ; la réalisation en continu de N1 échantillonnages sur chaque courant de commande de phase du moteur selon la fréquence d'échantillonnage f, de façon à obtenir N1 valeurs de courant de chaque courant de commande de phase (120) ; le calcul des moyennes respectives des valeurs absolues de N1 valeurs de courant de chaque courant de commande de phase et l'acquisition d'une valeur moyenne d'échantillonnage de chaque courant de commande de phase (130) ; et si la valeur moyenne d'échantillonnage d'un courant de commande de phase quelconque est inférieure au seuil de courant Y1, détermination de l'absence en cours d'au moins un courant de commande de phase dans le moteur (140). Le présent procédé peut encore éviter efficacement l'occurrence d'une erreur de jugement relative à une perte de phase lorsque la forme d'onde d'un courant de commande réel diffère de celle d'un courant de commande idéal, l'amélioration de la précision de détection d'une perte de phase du moteur, en outre, le calcul dans la procédure de traitement est simple et a peu de chances de conduire à quelque erreur que ce soit.
PCT/CN2018/103004 2017-10-12 2018-08-29 Procédé et appareil de détection de perte de phase de moteur, et dispositif électronique WO2019072044A1 (fr)

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