WO2023213171A1 - 永磁电机的检测方法、装置、可读存储介质和永磁电机 - Google Patents

永磁电机的检测方法、装置、可读存储介质和永磁电机 Download PDF

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Publication number
WO2023213171A1
WO2023213171A1 PCT/CN2023/087650 CN2023087650W WO2023213171A1 WO 2023213171 A1 WO2023213171 A1 WO 2023213171A1 CN 2023087650 W CN2023087650 W CN 2023087650W WO 2023213171 A1 WO2023213171 A1 WO 2023213171A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
magnet motor
demagnetization
input voltage
rotor
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PCT/CN2023/087650
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English (en)
French (fr)
Inventor
李镇杉
吴文辉
贺伟衡
Original Assignee
重庆美的通用制冷设备有限公司
美的集团股份有限公司
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Application filed by 重庆美的通用制冷设备有限公司, 美的集团股份有限公司 filed Critical 重庆美的通用制冷设备有限公司
Publication of WO2023213171A1 publication Critical patent/WO2023213171A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
    • 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
    • G01R31/346—Testing of armature or field windings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
    • G01R33/1215—Measuring magnetisation; Particular magnetometers therefor

Definitions

  • the present disclosure relates to the field of motor technology, and specifically to a detection method, device, readable storage medium and permanent magnet motor for a permanent magnet motor.
  • the permanent magnets hidden inside the permanent magnet motor cannot be directly detected, and the demagnetization of the permanent magnet cannot be monitored.
  • the permanent magnet motor has technical problems such that risks cannot be checked, and safety and reliability are poor.
  • the present disclosure aims to at least solve the technical problems existing in the prior art.
  • some embodiments of the present disclosure propose a detection method for a permanent magnet motor.
  • Some embodiments of the present disclosure provide a detection device for a permanent magnet motor.
  • Some embodiments of the present disclosure provide a detection device for a permanent magnet motor.
  • Some embodiments of the present disclosure provide a readable storage medium.
  • Some embodiments of the present disclosure provide a permanent magnet motor.
  • Some embodiments of the present disclosure provide a compressor.
  • Some embodiments of the present disclosure provide an HVAC equipment.
  • some embodiments of the present disclosure propose a detection method for a permanent magnet motor.
  • the permanent magnet motor includes a permanent magnet.
  • the detection method includes:
  • the demagnetization parameters of the permanent magnets are determined based on the input voltage and rotor speed.
  • a permanent magnet motor includes a rotor in which permanent magnets are installed to provide excitation through the permanent magnets.
  • the permanent magnet that provides excitation is hidden inside the permanent magnet motor, so that the state of the permanent magnet cannot be directly measured by the detection device, and the demagnetization of the permanent magnet cannot be monitored.
  • the demagnetization amplitude of the permanent magnet reaches a certain level, the torque provided by the permanent magnet motor will be reduced, and the motor efficiency will be affected, causing related products to malfunction.
  • the demagnetization phenomenon of the permanent magnet will also increase the input current, causing the operating temperature of the permanent magnet to increase, and in severe cases, the motor will be burned. winding and creating safety issues. Therefore, permanent magnet motors have technical problems such as the demagnetization condition cannot be controlled, risks cannot be checked in time, and safety and reliability are poor.
  • the detection method of the permanent magnet motor proposed in this disclosure is as follows:
  • the rotor on the permanent magnet motor keeps rotating under the action of inertia.
  • the rotor speed of the permanent magnet motor is obtained, and the input voltage of the permanent magnet motor is obtained at the same time.
  • the prerequisite for obtaining the rotor speed and input voltage is that the rotor does not stop rotating.
  • the input voltage of the permanent magnet motor refers to the voltage at the output end of the drive inverter connected to the permanent magnet motor, which is also the voltage at the input end of the permanent magnet motor.
  • the demagnetization parameters of the permanent magnets inside the permanent magnet motor are obtained through the rotor speed and input voltage.
  • the demagnetization parameters of the permanent magnet can reflect the current demagnetization amplitude of the permanent magnet. The user can choose whether to maintain or replace the permanent magnet through the obtained demagnetization parameters.
  • the present disclosure allows users to understand the current demagnetization situation of the permanent magnet based on the demagnetization parameters of the permanent magnet detected by the detection method, so as to guide the user when the demagnetization amplitude of the permanent magnet affects the permanent magnet.
  • the risks caused by permanent magnet demagnetization of the permanent magnet motor should be checked by maintaining or replacing the permanent magnets. Realize the monitoring and risk investigation of permanent magnets in permanent magnet motors. On the one hand, it can prevent related products from malfunctioning due to demagnetization failure of permanent magnet motors. On the other hand, it can prevent permanent magnet motors from being damaged or even causing fire due to overheating due to demagnetization. This solves the technical problems existing in related technologies, such as the inability to control the demagnetization situation, the inability to detect risks in a timely manner, and poor safety and reliability.
  • the huge driving current and harmonic interference on the output side of the input voltage can be avoided.
  • the measurement results are used to improve the accuracy of the input voltage and the reliability of the demagnetization parameters.
  • measurements are taken within a short period of time after the motor is powered off. The state of the permanent magnets in the rotor of the permanent magnet motor is less different from the state during normal operation.
  • the demagnetization parameters determined according to the rotor speed and input voltage can be effectively It reflects the impact of demagnetization phenomenon during the work process, so that demagnetization parameters can be used as a tool to troubleshoot permanent magnet risks.
  • obtaining the rotor speed and input voltage of the permanent magnet motor after the permanent magnet motor can monitor the risk of permanent magnet demagnetization without additionally increasing the working time of the motor, thereby eliminating the impact of the monitoring process on the normal operation of the motor.
  • optimizing the detection method of permanent magnet motors improving the safety and reliability of permanent magnet motors, and providing convenient conditions for users.
  • the demagnetization parameters include magnetic field attenuation parameters
  • the steps of determining the demagnetization parameters of the permanent magnet according to the input voltage and rotor speed include:
  • the magnetic field attenuation parameter is determined according to the current magnetic field intensity and the preset calibration magnetic field intensity, where the current magnetic field intensity is negatively correlated with the magnetic field attenuation parameter.
  • the demagnetization parameter includes the magnetic field attenuation parameter of the permanent magnet, and the magnetic field attenuation parameter corresponds to the demagnetization amplitude of the permanent magnet.
  • the current magnetic field intensity corresponding to the current state of the permanent magnet is obtained through the rotor speed and input voltage.
  • the current magnetic field intensity is directly related to the magnetism of the permanent magnet. The greater the demagnetization amplitude of the permanent magnet, the weaker the magnetism, and the corresponding lower magnetic field intensity.
  • the magnetic field attenuation parameter of the permanent magnet is determined through the prestored calibration magnetic field intensity and the current magnetic field intensity.
  • the calibrated magnetic field intensity is only related to the structure of the permanent magnet motor and the properties of the permanent magnet itself, and has nothing to do with the actual working conditions.
  • a constant calibrated magnetic field intensity can be obtained.
  • the difference between the calibrated magnetic field intensity and the current magnetic field intensity corresponds to the attenuation amplitude of the permanent magnet's magnetism. The smaller the current magnetic field intensity, the greater the difference between it and the calibrated magnetic field intensity, and the corresponding magnetic field attenuation parameter is larger, so the current magnetic field intensity Negatively related to the magnetic field attenuation parameter.
  • the magnetic field attenuation parameters determined by this technical solution can allow users to intuitively understand the demagnetization amplitude of permanent magnets. Users can promptly maintain or replace permanent magnets based on the magnetic field attenuation parameters to avoid permanent magnet motor failure or even failure. Damage issue. This will achieve the technical effect of improving the practicality and reliability of permanent magnet motors.
  • the difference between the calibrated magnetic field intensity and the current magnetic field intensity can be used as the attenuation parameter, or the ratio of the calibrated magnetic field intensity and the current magnetic field intensity can be used as the attenuation parameter.
  • the ratio of the calibrated magnetic field intensity and the current magnetic field intensity can be used as the attenuation parameter.
  • the detection method of the permanent magnet motor further includes: issuing a first alarm message based on the magnetic field attenuation parameter being greater than or equal to the first threshold.
  • the magnitude relationship between the magnetic field attenuation parameter and the preset first threshold is compared.
  • the first threshold is used to define the working capacity of the permanent magnet motor.
  • the magnetic field attenuation parameter is less than the first threshold, it means that the current demagnetization amplitude of the permanent magnet is within the tolerable range, and the working status of the permanent magnet motor can meet the requirements of the product. Functional Requirements.
  • the magnetic field attenuation parameter is greater than or equal to the first threshold, it means that the current demagnetization amplitude of the permanent magnet has affected the normal operation of the permanent magnet motor, resulting in the permanent magnet motor possibly experiencing reduced torque, reduced efficiency, increased input current, and permanent magnet Overheating problem.
  • the automatic risk screening function of the permanent magnet motor can be realized.
  • the permanent magnet motor can use the first alarm information to remind the user that there is a risk in the permanent magnet motor, so that the user can promptly eliminate the risk by maintaining the permanent magnet or replacing the permanent magnet.
  • the first alarm information includes buzzer alarm, vibration alarm, flash alarm, etc. Such alarms can attract the attention of nearby users to prompt users to maintain and replace the permanent magnets.
  • the first alarm information can also be sent to the product display or a mobile terminal held by the user, so that the first alarm information is displayed on the product display or mobile terminal in the form of push information to facilitate the user to eliminate risks in a timely manner.
  • this technical solution does not impose a rigid limit on the specific form of the first alarm information, as long as it meets the alarm prompt requirements.
  • the demagnetization parameters include temperature rise parameters, and the demagnetization parameters of the permanent magnet are determined according to the input voltage and rotor speed, including:
  • the temperature rise parameter is determined based on the current temperature and the preset standard temperature, where the current temperature and the temperature rise parameter are positively correlated.
  • the demagnetization parameters include the temperature rise parameter of the permanent magnet, and the temperature rise parameter corresponds to the demagnetization of the permanent magnet. amplitude.
  • the current temperature corresponding to the current state of the permanent magnet is obtained through the rotor speed and input voltage.
  • the current temperature is directly related to the magnetism of the permanent magnet. The greater the demagnetization amplitude of the permanent magnet, the weaker the magnetism, and the higher the corresponding temperature.
  • the temperature rise parameter of the permanent magnet is determined based on the prestored standard temperature and the current temperature.
  • the standard temperature is related to the structure of the permanent magnet motor and the properties of the permanent magnet itself. After the design of the permanent magnet motor is completed, the standard temperature can be obtained, and the standard temperature corresponds to the normal operating temperature of the permanent magnet motor.
  • the difference between the current temperature and the standard temperature corresponds to the attenuation amplitude of the permanent magnet's magnetism. The higher the current temperature, the greater the difference between it and the standard temperature, and the corresponding temperature rise parameter is larger, so the current temperature is positively related to the temperature rise parameter. .
  • the temperature rise parameters determined by this technical solution can allow users to intuitively understand the operating temperature of permanent magnets and the demagnetization amplitude of permanent magnets.
  • users can judge whether the permanent magnet motor is damaged by high temperature based on the temperature rise parameters. risk.
  • users can maintain or replace the permanent magnets in time according to the temperature rise parameters to avoid the failure or even damage of the permanent magnet motor. This will achieve the technical effect of improving the practicality and reliability of permanent magnet motors.
  • the difference between the current temperature and the standard temperature can be used as the attenuation parameter, or the ratio of the current temperature and the standard temperature can be used as the attenuation parameter. There is no hard limit in this technical solution.
  • the detection method further includes: issuing a second alarm message based on the temperature rise parameter being greater than or equal to the second threshold.
  • the relationship between the temperature rise parameter and the preset second threshold is compared.
  • the second threshold is used to define the working capacity of the permanent magnet motor.
  • the temperature rise parameter is less than the second threshold, it means that the current demagnetization amplitude of the permanent magnet is within the tolerable range, and the working status of the permanent magnet motor can meet the requirements of the product. Functional Requirements.
  • the temperature rise parameter is greater than or equal to the second threshold, it means that the current demagnetization amplitude of the permanent magnet has affected the normal operation of the permanent magnet motor, resulting in the permanent magnet motor possibly experiencing reduced torque, reduced efficiency, increased input current, and permanent magnet Overheating problem.
  • the automatic risk screening function of the permanent magnet motor can be realized.
  • the permanent magnet motor can use the second alarm information to remind the user that there is a risk in the permanent magnet motor, so that the user can promptly eliminate the risk by maintaining the permanent magnet or replacing the permanent magnet.
  • the second alarm information includes buzzer alarm, vibration alarm, flash alarm, etc. Such alarms can attract the attention of nearby users to prompt users to maintain and replace the permanent magnets.
  • the second alarm information can also be sent to the product display or the mobile terminal held by the user, so that the second alarm information is displayed on the product display or mobile terminal in the form of push information to facilitate the user to eliminate risks in a timely manner.
  • this technical solution does not impose a rigid limit on the specific form of the second alarm information, as long as it meets the alarm prompt requirements.
  • the detection method of the permanent magnet motor also includes:
  • the step of determining the temperature rise parameter of the permanent magnet through the prestored standard temperature and the current temperature. Calculate the difference between the temperature rise parameter obtained during this detection and the duration value, and then compare the calculated difference with the preset third threshold. If the difference is less than the third threshold, the temperature rise parameter obtained from this detection is directly stored, and the temperature rise parameter is used as a duration value to facilitate comparison of the change amplitude of the next detection. On the contrary, if the difference is greater than or equal to the third threshold, a prompt message is first sent, and after the prompt message is sent, the temperature rise parameter obtained from this detection is stored, and the temperature rise parameter is used as a duration value.
  • the third threshold is used to define whether the demagnetization of the permanent magnet belongs to conventional demagnetization. If the difference between the current temperature rise parameter and the historical temperature rise parameter is less than the third threshold, it means that it falls within the scope of conventional demagnetization. If the difference between the current temperature rise parameter and the historical temperature rise parameter is greater than or equal to the third threshold, it indicates that the temperature rise of the permanent magnet is abnormal, which may include other reasons for the temperature rise. Then a prompt message is issued to remind the user to troubleshoot other faults on the permanent magnet motor.
  • the working status of the cooling mechanism of a permanent magnet motor is directly related to the temperature of the permanent magnet. If the cooling mechanism can work normally, the temperature rise of the permanent magnet may mainly come from the demagnetization problem. If the cooling mechanism fails, the temperature rise parameter of the permanent magnet will exceed the reasonable range. The prompt information sent can be used to troubleshoot such problems. In order to achieve the technical effect of improving the degree of self-intelligence of permanent magnet motors, improving the safety and reliability of permanent magnet motors, and improving user experience.
  • the prompt information includes buzzer alarm, vibration alarm, flash alarm, etc. Such alarms can attract the attention of nearby users to prompt users to maintain and replace the permanent magnets.
  • the prompt information can also be sent to the product display or the mobile terminal held by the user, so that the prompt information is displayed on the product display or mobile terminal in the form of push information to facilitate the user to eliminate risks in a timely manner.
  • this technical solution does not impose hard restrictions on the specific form of the prompt information, as long as it meets the alarm prompt requirements.
  • the steps of obtaining the input voltage and rotor speed of the permanent magnet motor include:
  • the input voltage and rotor speed of the permanent magnet motor are obtained.
  • the input current of the permanent magnet motor is obtained.
  • the input current corresponds to the actual input of the permanent magnet motor.
  • the input current of the permanent magnet motor may be greater than zero.
  • the fourth threshold corresponds to the reasonable error of the input current measurement after the permanent magnet motor is stopped. If it is determined that the input current is less than or equal to the first Four thresholds, it can be determined that the permanent magnet motor is completely powered off, and the permanent magnet motor rotor speed and input voltage can be obtained immediately.
  • the input current is greater than the fourth threshold, it means that there is still an input current between the drive inverter and the input terminal of the permanent magnet motor, and then the input current is detected cyclically until the input current is less than the fourth threshold.
  • this cycle detection method can ensure This detection step intervenes immediately after the permanent magnet motor is completely powered off to reduce the detection error caused by the cooling of the permanent magnet itself, thereby further improving the reliability of the demagnetization parameters. This will achieve the technical effect of optimizing the detection method of permanent magnet motors and improving the accuracy of demagnetization detection.
  • Some embodiments of the present disclosure provide a detection device for a permanent magnet motor.
  • the detection device includes:
  • the acquisition module is used to obtain the input voltage and rotor speed of the permanent magnet motor when the permanent magnet motor is stopped and the rotor keeps rotating;
  • a permanent magnet motor includes a rotor in which permanent magnets are installed to provide excitation through the permanent magnets.
  • the permanent magnet that provides excitation is hidden inside the permanent magnet motor, so that the state of the permanent magnet cannot be directly measured by the detection device, and the demagnetization of the permanent magnet cannot be monitored.
  • the demagnetization amplitude of the permanent magnet reaches a certain level, the torque provided by the permanent magnet motor will be reduced, and the motor efficiency will be affected, causing related products to malfunction.
  • the demagnetization phenomenon of the permanent magnet will also increase the input current, causing the operating temperature of the permanent magnet to increase. In severe cases, it will burn the motor windings and cause safety problems. Therefore, permanent magnet motors have technical problems such as the demagnetization condition cannot be controlled, risks cannot be checked in time, and safety and reliability are poor.
  • the detection device of a permanent magnet motor proposed in this disclosure includes an acquisition module and a determination module.
  • the acquisition module is used to obtain the rotor speed of the permanent magnet motor and obtain the input voltage of the permanent magnet motor while the rotor on the permanent magnet motor keeps rotating under the action of inertia after the power supply to the permanent magnet motor is stopped.
  • the prerequisite for obtaining the rotor speed and input voltage is that the rotor does not stop rotating.
  • the input voltage of the permanent magnet motor refers to the voltage at the output end of the drive inverter connected to the permanent magnet motor, which is also the voltage at the input end of the permanent magnet motor.
  • the determination module is used to obtain the demagnetization parameters of the permanent magnets inside the permanent magnet motor through the rotor speed and input voltage after obtaining the input voltage and rotor speed of the permanent magnet motor.
  • the demagnetization parameters of the permanent magnet can reflect the current demagnetization amplitude of the permanent magnet. The user can choose whether to maintain or replace the permanent magnet through the obtained demagnetization parameters.
  • the present disclosure allows users to understand the current demagnetization situation of the permanent magnet based on the demagnetization parameters of the permanent magnet detected by the detection device, so as to guide the user when the demagnetization amplitude of the permanent magnet affects the permanent magnet.
  • the risks caused by permanent magnet demagnetization of the permanent magnet motor should be checked by maintaining or replacing the permanent magnets. Realize the monitoring and risk investigation of permanent magnets in permanent magnet motors. On the one hand, it can prevent related products from malfunctioning due to demagnetization failure of permanent magnet motors. On the other hand, it can prevent permanent magnet motors from being damaged or even causing fire due to overheating due to demagnetization. This solves the technical problems existing in related technologies, such as the inability to control the demagnetization situation, the inability to detect risks in a timely manner, and poor safety and reliability.
  • the huge driving current and harmonic interference on the output side of the input voltage can be avoided.
  • the measurement results are used to improve the accuracy of the input voltage and the reliability of the demagnetization parameters.
  • measurements are taken within a short period of time after the motor is powered off. The state of the permanent magnets in the rotor of the permanent magnet motor is less different from the state during normal operation.
  • the demagnetization parameters determined according to the rotor speed and input voltage can be effectively It reflects the impact of demagnetization phenomenon during the work process, so that demagnetization parameters can be used as a tool to troubleshoot permanent magnet risks.
  • obtaining the rotor speed and input voltage of the permanent magnet motor after the permanent magnet motor can monitor the risk of permanent magnet demagnetization without additionally increasing the working time of the motor, thereby eliminating the impact of the monitoring process on the normal operation of the motor. to achieve optimal
  • the detection device of the permanent magnet motor is optimized to improve the safety and reliability of the permanent magnet motor and provide users with convenient technical effects.
  • Some embodiments of the present disclosure provide a detection device for a permanent magnet motor.
  • the detection device for a permanent magnet motor includes: a memory on which programs or instructions are stored; and a processor configured to implement some of the above implementations when executing the program or instructions.
  • the steps of the detection method of the permanent magnet motor in the example therefore have all the beneficial effects of the detection method of the permanent magnet motor in some of the above embodiments.
  • Some embodiments of the present disclosure provide a readable storage medium on which a program or instructions are stored.
  • the program or instructions are executed by a processor, the steps of the detection method of the permanent magnet motor in some of the above embodiments are implemented. Therefore, It has all the beneficial effects of the detection methods of permanent magnet motors in some of the above embodiments.
  • Some embodiments of the present disclosure provide a permanent magnet motor, including a detection device for a permanent magnet motor as described in some embodiments above or a detection device for a permanent magnet motor in other embodiments or a readable storage medium in some embodiments. . Therefore, it has all the beneficial effects of the detection device of the permanent magnet motor in some of the above embodiments or all the beneficial effects of the detection device of the permanent magnet motor in other embodiments or all the beneficial effects of the readable storage medium in the above embodiments.
  • the permanent magnet motor includes: a motor body; and an access end, which is provided on the motor body and is used to connect to the drive inverter.
  • the permanent magnet motor includes a motor body, and the motor body includes a stator assembly, a rotor assembly and an access end.
  • the access end is used to connect the drive inverter, and the drive inverter is used to supply power to the motor body.
  • the drive frequency converter includes a connected rectifier and an inverter, and the inverter is connected to the motor body through the access terminal.
  • the drive frequency converter also includes a drive controller, which includes an acceleration and deceleration operator and a pulse width modulator.
  • the permanent magnet motor further includes: a first sensor connected to the access terminal for sensing the input voltage, and the detection device is connected to the first sensor.
  • the permanent magnet motor further includes a first sensor.
  • the first sensor is disposed on the access end, between the motor body and the inverter, and is used to sense the input voltage of the permanent magnet motor.
  • the detection device is connected to the first sensor, and the detection device obtains the input voltage from the first sensor.
  • the permanent magnet motor further includes: a second sensor, which is provided on the motor body and used to sense the rotor speed, and the detection device is connected to the second sensor.
  • the permanent magnet motor also includes a second sensor.
  • the second sensor is installed on the motor body, and the second sensor is used to measure the rotor speed of the rotor assembly in the permanent magnet motor.
  • the detection device is connected to the second sensor, and the detection device obtains the rotor speed from the second sensor.
  • the motor body includes a rotor shaft, and a measuring part is provided on the peripheral side of the rotor shaft; the second sensor is arranged opposite to the annular surface where the measuring part is located.
  • the structure of the second sensor is limited.
  • the rotor assembly includes a rotor and a rotor shaft.
  • a measuring portion is provided on the circumferential side of the rotor shaft, and the measuring portion can have a groove structure.
  • the second sensor is arranged on the circumferential side of the rotor shaft and is spaced apart from the circumferential side of the rotor shaft.
  • the two ends of the second sensor are opposite to the ring surface provided with the measuring part on the side of the rotor shaft, so that the measuring part can be sensed once by the second sensor once the rotor shaft rotates once, thereby measuring the relationship between the rotor shaft and the rotor shaft.
  • the second sensor package may be an electromagnetic induction sensor or a photoelectric sensor.
  • Some embodiments of the present disclosure provide a compressor including the permanent magnet motor as in some of the above embodiments. Therefore, it has all the beneficial effects of the permanent magnet motor in some of the above embodiments.
  • Some embodiments of the present disclosure provide an HVAC equipment, including the compressor as in some of the above embodiments. Therefore, all the beneficial effects of the compressor in some of the above embodiments are achieved.
  • Figure 1 shows one of the schematic flow diagrams of the detection method of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • Figure 2 shows the second schematic flowchart of the detection method of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • Figure 3 shows the third schematic flowchart of the detection method of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • Figure 4 shows the fourth schematic flowchart of the detection method of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • Figure 5 shows the fifth schematic flowchart of the detection method of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • Figure 6 shows a parameter change trend diagram of the permanent magnet motor after shutdown provided by at least one embodiment of the present disclosure
  • Figure 7 shows the sixth schematic flowchart of the detection method of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • Figure 8 shows a structural block diagram of a control device of a floor cleaning equipment provided by at least one embodiment of the present disclosure
  • Figure 9 shows a structural block diagram of a control device for floor cleaning equipment provided by at least one embodiment of the present disclosure.
  • Figure 10 shows a structural block diagram of a floor cleaning device provided by at least one embodiment of the present disclosure
  • Figure 11 shows one of the structural schematic diagrams of a permanent magnet motor provided by at least one embodiment of the present disclosure
  • FIG. 12 shows the second structural schematic diagram of the permanent magnet motor provided by at least one embodiment of the present disclosure.
  • the following describes the detection method, device, readable storage medium and permanent magnet motor of a permanent magnet motor provided according to some embodiments of the present disclosure with reference to FIGS. 1 to 12 .
  • some embodiments of the present disclosure provide a detection method for a permanent magnet motor.
  • the permanent magnet motor includes a permanent magnet.
  • the detection method for a permanent magnet motor includes:
  • Step 102 after stopping the power supply to the permanent magnet motor, the rotor on the permanent magnet motor keeps rotating under the action of inertia. In this process, the rotor speed of the permanent magnet motor is obtained, and the input voltage of the permanent magnet motor is obtained at the same time;
  • Step 104 Determine the demagnetization parameters of the permanent magnets inside the permanent magnet motor based on the rotor speed and input voltage.
  • a permanent magnet motor includes a rotor in which permanent magnets are installed to provide excitation through the permanent magnets.
  • the permanent magnet that provides excitation is hidden inside the permanent magnet motor, so that the state of the permanent magnet cannot be directly measured by the detection device, and the demagnetization of the permanent magnet cannot be monitored.
  • the demagnetization amplitude of the permanent magnet reaches a certain level, the torque provided by the permanent magnet motor will be reduced, and the motor efficiency will be affected, causing related products to malfunction.
  • the demagnetization phenomenon of the permanent magnet will also increase the input current, causing the operating temperature of the permanent magnet to increase. In severe cases, it will burn the motor windings and cause safety problems. Therefore, permanent magnet motors have technical problems such as the demagnetization condition cannot be controlled, risks cannot be checked in time, and safety and reliability are poor.
  • the detection method of the permanent magnet motor proposed in this disclosure is as follows:
  • the rotor on the permanent magnet motor keeps rotating under the action of inertia.
  • the rotor speed of the permanent magnet motor is obtained, and the input voltage of the permanent magnet motor is obtained at the same time.
  • the prerequisite for obtaining the rotor speed and input voltage is that the rotor does not stop rotating.
  • the input voltage of the permanent magnet motor refers to the voltage at the output end of the drive inverter connected to the permanent magnet motor, which is also the voltage at the input end of the permanent magnet motor.
  • the demagnetization parameters of the permanent magnets inside the permanent magnet motor are obtained through the rotor speed and input voltage.
  • the demagnetization parameters of the permanent magnet can reflect the current demagnetization amplitude of the permanent magnet. The user can choose whether to maintain or replace the permanent magnet through the obtained demagnetization parameters.
  • the present disclosure allows users to understand the current demagnetization situation of the permanent magnet based on the demagnetization parameters of the permanent magnet detected by the detection method, so as to guide the user when the demagnetization amplitude of the permanent magnet affects the permanent magnet.
  • the risks caused by permanent magnet demagnetization of the permanent magnet motor should be checked by maintaining or replacing the permanent magnets. Realize the monitoring and risk investigation of permanent magnets in permanent magnet motors. On the one hand, it can prevent related products from malfunctioning due to demagnetization failure of permanent magnet motors. On the other hand, it can prevent permanent magnet motors from being damaged or even causing fire due to overheating due to demagnetization. This solves the technical problems existing in related technologies, such as the inability to control the demagnetization situation, the inability to detect risks in a timely manner, and poor safety and reliability.
  • the demagnetization parameters determined according to the rotor speed and input voltage can be effectively It reflects the impact of demagnetization phenomenon during the work process, so that demagnetization parameters can be used as a tool to troubleshoot permanent magnet risks.
  • obtaining the rotor speed and input voltage of the permanent magnet motor after the permanent magnet motor can monitor the risk of permanent magnet demagnetization without additionally increasing the working time of the motor, thereby eliminating the impact of the monitoring process on the normal operation of the motor. This will further achieve the technical effect of optimizing the detection method of permanent magnet motors, improving the safety and reliability of permanent magnet motors, and providing convenient conditions for users.
  • the shaded part in Figure 6 corresponds to the collection interval of the present disclosure.
  • the demagnetization parameters include magnetic field attenuation parameters.
  • the steps to determine the demagnetization parameters of the permanent magnet according to the input voltage and rotor speed include:
  • Step 202 after obtaining the rotor speed and input voltage of the permanent magnet motor, obtain the current magnetic field intensity corresponding to the current state of the permanent magnet through the rotor speed and input voltage;
  • Step 204 Determine the magnetic field attenuation parameter of the permanent magnet through the prestored calibration magnetic field intensity and the current magnetic field intensity.
  • the demagnetization parameter includes a magnetic field attenuation parameter of the permanent magnet, and the magnetic field attenuation parameter corresponds to the demagnetization amplitude of the permanent magnet.
  • the current magnetic field intensity corresponding to the current state of the permanent magnet is obtained through the rotor speed and input voltage.
  • the current magnetic field intensity is directly related to the magnetism of the permanent magnet. The greater the demagnetization amplitude of the permanent magnet, the weaker the magnetism, and the corresponding lower magnetic field intensity.
  • the magnetic field attenuation parameter of the permanent magnet is determined through the prestored calibration magnetic field intensity and the current magnetic field intensity.
  • the calibrated magnetic field intensity is only related to the structure of the permanent magnet motor and the properties of the permanent magnet itself, and has nothing to do with the actual working conditions.
  • a constant calibrated magnetic field intensity can be obtained.
  • the difference between the calibrated magnetic field intensity and the current magnetic field intensity corresponds to the attenuation amplitude of the permanent magnet's magnetism. The smaller the current magnetic field intensity, the greater the difference between it and the calibrated magnetic field intensity, and the corresponding magnetic field attenuation parameter is larger, so the current magnetic field intensity Negatively related to the magnetic field attenuation parameter.
  • the magnetic field attenuation parameters determined in this embodiment can allow the user to intuitively understand the demagnetization amplitude of the permanent magnet.
  • the user can promptly maintain or replace the permanent magnet according to the magnetic field attenuation parameter to avoid permanent magnet motor failure or even failure. Damage issue. This will achieve the technical effect of improving the practicality and reliability of permanent magnet motors.
  • the difference between the calibrated magnetic field intensity and the current magnetic field intensity can be used as the attenuation parameter, or the ratio of the calibrated magnetic field intensity and the current magnetic field intensity can be used as the attenuation parameter, which is not strictly limited in this embodiment.
  • the detection method of the permanent magnet motor also includes: issuing a first alarm message based on the magnetic field attenuation parameter being greater than or equal to the first threshold.
  • the magnitude relationship between the magnetic field attenuation parameter and the preset first threshold is compared.
  • the first threshold is used to define the working capacity of the permanent magnet motor.
  • the magnetic field attenuation parameter is less than the first threshold, it means that the current demagnetization amplitude of the permanent magnet is within the tolerable range, and the working status of the permanent magnet motor can meet the requirements of the product. Functional Requirements.
  • the magnetic field attenuation parameter is greater than or equal to the first threshold, it means that the current demagnetization amplitude of the permanent magnet has affected the normal operation of the permanent magnet motor, resulting in the permanent magnet motor possibly experiencing reduced torque, reduced efficiency, increased input current, and permanent magnet Overheating problem.
  • the automatic risk screening function of the permanent magnet motor can be realized.
  • the permanent magnet motor can use the first alarm information to remind the user that there is a risk in the permanent magnet motor, so that the user can promptly eliminate the risk by maintaining the permanent magnet or replacing the permanent magnet.
  • the first alarm information includes buzzer alarm, vibration alarm, flash alarm, etc. Such alarms can attract the attention of nearby users to prompt users to maintain and replace the permanent magnets.
  • the first alarm information can also be sent to the product display or the mobile terminal held by the user, so that the first alarm information is displayed on the product display or in the form of push information. on the mobile terminal so that users can eliminate risks in a timely manner.
  • this embodiment does not impose a hard limit on the specific form of the first alarm information, as long as it meets the alarm prompt requirements.
  • the demagnetization parameters include temperature rise parameters.
  • the demagnetization parameters of the permanent magnet are determined based on the input voltage and rotor speed, including:
  • Step 302 Obtain the current temperature corresponding to the current state of the permanent magnet through the rotor speed and input voltage;
  • Step 304 Determine the temperature rise parameter of the permanent magnet based on the prestored standard temperature and the current temperature.
  • the demagnetization parameter includes a temperature rise parameter of the permanent magnet, and the temperature rise parameter corresponds to the demagnetization amplitude of the permanent magnet.
  • the current temperature corresponding to the current state of the permanent magnet is obtained through the rotor speed and input voltage.
  • the current temperature is directly related to the magnetism of the permanent magnet. The greater the demagnetization amplitude of the permanent magnet, the weaker the magnetism, and the higher the corresponding temperature.
  • the temperature rise parameter of the permanent magnet is determined based on the prestored standard temperature and the current temperature.
  • the standard temperature is related to the structure of the permanent magnet motor and the properties of the permanent magnet itself. After the design of the permanent magnet motor is completed, the standard temperature can be obtained, and the standard temperature corresponds to the normal operating temperature of the permanent magnet motor.
  • the difference between the current temperature and the standard temperature corresponds to the attenuation amplitude of the permanent magnet's magnetism. The higher the current temperature, the greater the difference between it and the standard temperature, and the corresponding temperature rise parameter is larger, so the current temperature is positively related to the temperature rise parameter. .
  • the temperature rise parameter determined in this embodiment can allow the user to intuitively understand the operating temperature of the permanent magnet and the demagnetization amplitude of the permanent magnet.
  • the user can judge whether the permanent magnet motor is damaged by high temperature based on the temperature rise parameter. risk.
  • users can maintain or replace the permanent magnets in time according to the temperature rise parameters to avoid the failure or even damage of the permanent magnet motor. This will achieve the technical effect of improving the practicality and reliability of permanent magnet motors.
  • the difference between the current temperature and the standard temperature can be used as the attenuation parameter, or the ratio of the current temperature and the standard temperature can be used as the attenuation parameter, which is not strictly limited in this embodiment.
  • the detection method also includes: issuing a second alarm message based on the temperature rise parameter being greater than or equal to the second threshold.
  • the relationship between the temperature rise parameter and the preset second threshold is compared.
  • the second threshold is used to define the working capacity of the permanent magnet motor.
  • the temperature rise parameter is less than the second threshold, it means that the current demagnetization amplitude of the permanent magnet is within the tolerable range, and the working status of the permanent magnet motor can meet the requirements of the product. Functional Requirements.
  • the temperature rise parameter is greater than or equal to the second threshold, it means that the current demagnetization amplitude of the permanent magnet has affected the normal operation of the permanent magnet motor, resulting in the permanent magnet motor possibly experiencing reduced torque, reduced efficiency, increased input current, and permanent magnet Overheating problem.
  • the automatic risk screening function of the permanent magnet motor can be realized.
  • the permanent magnet motor can use the second alarm information to remind the user that there is a risk in the permanent magnet motor, so that the user can promptly eliminate the risk by maintaining the permanent magnet or replacing the permanent magnet.
  • the second alarm information includes buzzer alarm, vibration alarm, flash alarm, etc. Such alarms can cause additional Near the user's attention to prompt the user to maintain and replace the permanent magnet.
  • the second alarm information can also be sent to the product display or the mobile terminal held by the user, so that the second alarm information is displayed on the product display or mobile terminal in the form of push information to facilitate the user to eliminate risks in a timely manner.
  • this embodiment does not impose a hard limit on the specific form of the second alarm information, as long as it meets the alarm prompt requirements.
  • the detection methods of permanent magnet motors also include:
  • Step 402 Calculate the difference between the temperature rise parameter obtained from this detection and the duration value, and then compare the calculated difference with the preset third threshold. If the difference is greater than or equal to At the third threshold, a prompt message is issued;
  • Step 404 Store the temperature rise parameter and use the temperature rise parameter as a historical value.
  • the step of determining the temperature rise parameter of the permanent magnet through the prestored standard temperature and the current temperature. Calculate the difference between the temperature rise parameter obtained during this detection and the duration value, and then compare the calculated difference with the preset third threshold. If the difference is less than the third threshold, the temperature rise parameter obtained from this detection is directly stored, and the temperature rise parameter is used as a duration value to facilitate comparison of the change amplitude of the next detection. On the contrary, if the difference is greater than or equal to the third threshold, a prompt message is first sent, and after the prompt message is sent, the temperature rise parameter obtained from this detection is stored, and the temperature rise parameter is used as a duration value.
  • the third threshold is used to define whether the demagnetization of the permanent magnet belongs to conventional demagnetization. If the difference between the current temperature rise parameter and the historical temperature rise parameter is less than the third threshold, it means that it falls within the scope of conventional demagnetization. If the difference between the current temperature rise parameter and the historical temperature rise parameter is greater than or equal to the third threshold, it indicates that the temperature rise of the permanent magnet is abnormal, which may include other reasons for the temperature rise. Then a prompt message is issued to remind the user to troubleshoot other faults on the permanent magnet motor.
  • the working status of the cooling mechanism of a permanent magnet motor is directly related to the temperature of the permanent magnet. If the cooling mechanism can work normally, the temperature rise of the permanent magnet may mainly come from the demagnetization problem. If the cooling mechanism fails, the temperature rise parameter of the permanent magnet will exceed the reasonable range. The prompt information sent can be used to troubleshoot such problems. In order to achieve the technical effect of improving the degree of self-intelligence of permanent magnet motors, improving the safety and reliability of permanent magnet motors, and improving user experience.
  • the prompt information includes buzzer alarm, vibration alarm, flash alarm, etc. Such alarms can attract the attention of nearby users to prompt users to maintain and replace the permanent magnets.
  • the prompt information can also be sent to the product display or the mobile terminal held by the user, so that the prompt information is displayed on the product display or mobile terminal in the form of push information to facilitate the user to eliminate risks in a timely manner.
  • this embodiment does not impose a hard limit on the specific form of the prompt information, as long as it meets the alarm prompt requirements.
  • the steps to obtain the input voltage and rotor speed of the permanent magnet motor include:
  • Step 502 When the permanent magnet motor receives the stop command, in response to the stop command of the permanent magnet motor, obtain the input current of the permanent magnet motor;
  • Step 504 Compare the magnitude relationship between the preset fourth threshold and the input current, and obtain the rotor speed and input voltage of the permanent magnet motor when the input current is less than or equal to the fourth threshold.
  • the rotor on the permanent magnet motor keeps rotating under the action of inertia.
  • the rotor speed of the permanent magnet motor is obtained, and the rotation speed of the permanent magnet motor is obtained at the same time. input power Press this step.
  • the input current of the permanent magnet motor is obtained.
  • the input current corresponds to the actual input of the permanent magnet motor.
  • the input current of the permanent magnet motor may be greater than zero.
  • the fourth threshold corresponds to the reasonable error of the input current measurement after the permanent magnet motor is stopped. If it is determined that the input current is less than or equal to the first Four thresholds, it can be determined that the permanent magnet motor is completely powered off, and the permanent magnet motor rotor speed and input voltage can be obtained immediately.
  • the input current is greater than the fourth threshold, it means that there is still an input current between the drive inverter and the input terminal of the permanent magnet motor, and then the input current is detected cyclically until the input current is less than the fourth threshold.
  • this cyclic detection method can ensure that the detection step is intervened as soon as possible after the permanent magnet motor is completely powered off to reduce detection errors caused by the cooling of the permanent magnet itself, thereby further improving the reliability of demagnetization parameters. This will achieve the technical effect of optimizing the detection method of permanent magnet motors and improving the accuracy of demagnetization detection.
  • each work step is as follows:
  • Step 702 receive the shutdown command
  • Step 704 the drive inverter output is powered off
  • Step 706, detect the input current output by the frequency converter to the permanent magnet motor
  • Step 708 determine whether the input current is less than or equal to the fourth threshold
  • Step 710 measure the input voltage of the permanent magnet motor
  • Step 712 measure the rotor speed of the permanent magnet motor
  • Step 714 determine the current magnetic field strength and current temperature of the permanent magnet
  • Step 716 calculate the magnetic field attenuation parameters
  • Step 718 calculate the temperature rise parameters
  • Step 720 evaluate the health of the permanent magnet based on the calibrated magnetic field strength
  • Step 722 evaluate the health of the permanent magnet based on the standard temperature
  • Step 724 determine whether there is a hidden danger
  • step 726 is executed, and if the judgment result is no, the process ends;
  • Step 726 Issue an alarm prompt.
  • some embodiments of the present disclosure provide a detection device 800 for a permanent magnet motor.
  • the detection device 800 for a permanent magnet motor includes: an acquisition module 802, which is used to obtain the permanent magnet motor after stopping power supply to the permanent magnet motor.
  • the rotor on the motor keeps rotating under the action of inertia. In the process, the rotor speed of the permanent magnet motor is obtained, and the input voltage of the permanent magnet motor is obtained at the same time; the determination module 804 determines the permanent magnets inside the permanent magnet motor through the rotor speed and input voltage. demagnetization parameters.
  • a detection device 800 for a permanent magnet motor includes a rotor in which permanent magnets are installed to provide excitation through the permanent magnets.
  • the permanent magnet that provides excitation is hidden inside the permanent magnet motor, so that the state of the permanent magnet cannot be directly measured by the detection device, and the demagnetization of the permanent magnet cannot be monitored.
  • the demagnetization amplitude of the permanent magnet reaches a certain level, the torque provided by the permanent magnet motor will be reduced, and the motor efficiency will be affected, causing related products to malfunction.
  • the demagnetization phenomenon of the permanent magnet will also increase the input current, causing the operating temperature of the permanent magnet to increase. In severe cases, it will burn the motor windings and cause safety problems. Therefore, permanent magnet motors have technical problems such as the demagnetization condition cannot be controlled, risks cannot be checked in time, and safety and reliability are poor.
  • the detection device 800 of a permanent magnet motor proposed in this disclosure includes an acquisition module 802 and a determination module 804.
  • the acquisition module 802 is used to obtain the rotor speed of the permanent magnet motor and obtain the input voltage of the permanent magnet motor while the rotor on the permanent magnet motor keeps rotating under the action of inertia after the power supply to the permanent magnet motor is stopped.
  • the prerequisite for obtaining the rotor speed and input voltage is that the rotor does not stop rotating.
  • the input voltage of the permanent magnet motor refers to the voltage at the output end of the drive inverter connected to the permanent magnet motor, which is also the voltage at the input end of the permanent magnet motor.
  • the determination module 804 is configured to obtain the demagnetization parameters of the permanent magnets inside the permanent magnet motor through the rotor speed and input voltage after acquiring the input voltage and rotor speed of the permanent magnet motor. Among them, the demagnetization parameters of the permanent magnet can reflect the current demagnetization amplitude of the permanent magnet. The user can choose whether to maintain or replace the permanent magnet through the obtained demagnetization parameters.
  • the present disclosure allows users to understand the current demagnetization situation of the permanent magnet based on the demagnetization parameters of the permanent magnet detected by the detection device, so as to guide the user when the demagnetization amplitude of the permanent magnet affects the permanent magnet.
  • the risks caused by permanent magnet demagnetization of the permanent magnet motor should be checked by maintaining or replacing the permanent magnets. Realize the monitoring and risk investigation of permanent magnets in permanent magnet motors. On the one hand, it can prevent related products from malfunctioning due to demagnetization failure of permanent magnet motors. On the other hand, it can prevent permanent magnet motors from being damaged or even causing fire due to overheating due to demagnetization. This solves the technical problems existing in related technologies, such as the inability to control the demagnetization situation, the inability to detect risks in a timely manner, and poor safety and reliability.
  • the huge driving current and harmonic interference on the output side of the input voltage can be avoided.
  • the measurement results are used to improve the accuracy of the input voltage and the reliability of the demagnetization parameters.
  • measurements are taken within a short period of time after the motor is powered off. The state of the permanent magnets in the rotor of the permanent magnet motor is less different from the state during normal operation.
  • the demagnetization parameters determined according to the rotor speed and input voltage can be effectively It reflects the impact of demagnetization phenomenon during the work process, so that demagnetization parameters can be used as a tool to troubleshoot permanent magnet risks.
  • obtaining the rotor speed and input voltage of the permanent magnet motor after the permanent magnet motor can monitor the risk of permanent magnet demagnetization without additionally increasing the working time of the motor, thereby eliminating the impact of the monitoring process on the normal operation of the motor. This further achieves the technical effect of optimizing the detection device 800 of the permanent magnet motor, improving the safety and reliability of the permanent magnet motor, and providing convenient conditions for users.
  • some embodiments of the present disclosure provide a detection device 900 for a permanent magnet motor.
  • the detection device 900 for a permanent magnet motor includes: a memory 902 with programs or instructions stored thereon; a processor 904 configured to When the program or instruction is executed, the steps of the detection method of the permanent magnet motor in some of the above embodiments are implemented, thus having all the beneficial effects of the detection method of the permanent magnet motor in some of the above embodiments.
  • Some embodiments of the present disclosure provide a readable storage medium 1002 having a program or instructions stored thereon.
  • some embodiments of the present disclosure provide a permanent magnet motor 1000, including the detection device 800 of the permanent magnet motor in some of the above embodiments or the detection device 900 or some of the permanent magnet motor in some embodiments.
  • Readable storage medium 1002 in an embodiment. Therefore, it has all the beneficial effects of the detection device 800 of the permanent magnet motor in some embodiments or all the beneficial effects of the detection device 900 of the permanent magnet motor in some embodiments or all the benefits of the readable storage medium 1002 in some embodiments. Effect.
  • the permanent magnet motor 100 includes: a motor body 110; and an access end 120, which is provided on the motor body 110 and is used to connect to the drive inverter.
  • the permanent magnet motor 100 includes a motor body 110 that includes a stator assembly, a rotor assembly and an access end 120 .
  • the access terminal 120 is used to connect to the drive inverter, and the drive inverter is used to supply power to the motor body 110 .
  • the driving frequency converter includes a connected rectifier 210 and an inverter 220 , and the inverter 220 is connected to the motor body 110 through the access terminal 120 .
  • the drive frequency converter also includes a drive controller 230 , which includes an acceleration and deceleration operator 232 and a pulse width modulator 234 .
  • the permanent magnet motor 100 further includes: a first sensor 130 connected to the access terminal 120 for sensing the input voltage, and the detection device 150 is connected to the first sensor 130 .
  • the permanent magnet motor 100 further includes a first sensor 130 .
  • the first sensor 130 is disposed on the access terminal 120 and is located between the motor body 110 and the inverter 220 .
  • the first sensor 130 is used to sense the input voltage of the permanent magnet motor 100 .
  • the detection device 150 is connected to the first sensor 130 , and the detection device 150 obtains the input voltage from the first sensor 130 .
  • the permanent magnet motor 100 further includes: a second sensor 140 provided on the motor body 110 for sensing the rotor speed, and the detection device 150 is connected to the second sensor 140 .
  • the permanent magnet motor 100 further includes a second sensor 140 .
  • the second sensor 140 is installed on the motor body 110 , and the second sensor 140 is used to measure the rotor speed of the rotor assembly in the permanent magnet motor 100 .
  • the detection device 150 is connected to the second sensor 140 , and the detection device 150 obtains the rotor speed from the second sensor 140 .
  • the motor body 110 includes a rotor shaft 112, and a measuring part 114 is provided on the peripheral side of the rotor shaft 112; the second sensor 140 is arranged opposite to the annular surface where the measuring part 114 is located.
  • the structure of the second sensor 140 is limited.
  • the rotor assembly includes a rotor and rotor shaft 112 .
  • a measuring portion 114 is provided on the peripheral side of the rotor shaft 112, and the measuring portion 114 may have a groove structure.
  • the second sensor 140 is disposed on the circumferential side of the rotor shaft 112 and is spaced apart from the circumferential side of the rotor shaft 112 .
  • the two ends of the second sensor 140 are opposite to the annular surface provided with the measuring portion 114 on the circumferential side of the rotor shaft 112, so that the measuring portion 114 of the rotor shaft 112 can be sensed once by the second sensor 140 once.
  • the second sensor 140 may be an electromagnetic induction sensor or a photoelectric sensor.
  • Some embodiments of the present disclosure provide a compressor including the permanent magnet motor 1000 as in some of the above embodiments. Therefore, it has all the beneficial effects of the permanent magnet motor 1000 in some of the above embodiments.
  • Some embodiments of the present disclosure provide an HVAC equipment, including the compressor as in some of the above embodiments. Therefore, all the beneficial effects of the compressor in some of the above embodiments are achieved.
  • the term “plurality” refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms “upper”, “lower”, etc. is based on the orientation or position of the drawings. The relationship is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure; the term “connection” “, “installation”, “fixing”, etc. should be understood in a broad sense.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediary.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediary.
  • the terms “one embodiment,” “some embodiments,” “specific embodiments,” etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in the disclosure. in at least one embodiment or example.
  • schematic representations of the above terms do not necessarily refer to the same embodiment or example.
  • the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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Abstract

一种永磁电机的检测方法、检测装置、可读存储介质、永磁电机、压缩机和暖通设备。其中，检测方法包括：在永磁电机停机且转子保持转动的情况下，获取永磁电机的输入电压和转子转速；根据输入电压和转子转速确定永磁体的退磁参数。

Description

永磁电机的检测方法、装置、可读存储介质和永磁电机
相关申请的交叉引用
本申请基于申请号为：202210484658.9，申请日为2022年5月6日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开涉及电机技术领域，具体而言，涉及一种永磁电机的检测方法、装置、可读存储介质和永磁电机。
背景技术
目前，为了提高电机的效率和实现高转速，越来越多的永磁电机被应用到工业和民用领域。但永磁电机中的永磁体存在退磁问题，若退磁幅度过大，会影响永磁电机的正常工作，甚至会烧毁永磁电机。
相关技术中，隐藏在永磁电机内部的永磁体无法直接检测，永磁体的退磁情况无法被监测，以至于永磁电机存在风险无法被排查，安全性和可靠性差的技术问题。
因此，如何设计出一种可有效解决上述技术缺陷的永磁电机的检测方法，成为了亟待解决的技术问题。
发明内容
本公开旨在至少解决现有技术中存在的技术问题。
为此，本公开的一些实施例提出了一种永磁电机的检测方法。
本公开的一些实施例提出了一种永磁电机的检测装置。
本公开的一些实施例提出了一种永磁电机的检测装置。
本公开的一些实施例提出了一种可读存储介质。
本公开的一些实施例提出了一种永磁电机。
本公开的一些实施例提出了一种压缩机。
本公开的一些实施例提出了一种暖通设备。
有鉴于此，本公开第的一些实施例提出了一种永磁电机的检测方法，永磁电机包括永磁体，检测方法包括：
在永磁电机停机且转子保持转动的情况下，获取永磁电机的输入电压和转子转速；
根据输入电压和转子转速确定永磁体的退磁参数。
本公开提出了一种永磁电机的检测方法。永磁电机包括转子，转子中安装有永磁体，以通过永磁体提供励磁。
相关技术中，提供励磁的永磁体隐藏在永磁电机内部，导致永磁体的状态无法被检测装置直接测量，致使永磁体的退磁情况无法被监控。当永磁体的退磁幅度达到一定程度时，永磁电机所提供的力矩会降低，电机效率会受到影响，导致关联产品出现故障。并且，永磁体退磁现象还会增大输入电流，导致永磁工作温度增高，严重时会烧毁电机 绕组并产生安全问题。因此，永磁电机存在退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
对此，本公开提出的永磁电机的检测方法如下：
首先，在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压。其中，获取转子转速和输入电压的前提是转子没有停止转动，永磁电机的输入电压指的是与永磁电机相连接的驱动变频器的输出端的电压，同样是永磁电机的输入端的电压。
在获取到永磁电机的输入电压和转子转速后，通过转子转速以及输入电压得出永磁电机内部永磁体的退磁参数。其中，永磁体的退磁参数可以反映出永磁体的当前退磁幅度，用户可通过得到的退磁参数选择是否对永磁体进行维护或更换。
由此可见，本公开通过限定上述检测方法，使用户可以根据该检测方法所检测出的永磁体退磁参数了解到该永磁体当前的退磁情况，以便于指引用户在永磁体的退磁幅度影响永磁电机的正常工作前通过维护或更换永磁体来排查掉永磁电机因永磁体退磁所带来的风险。实现对永磁电机中永磁体的监控和风险排查，一方面避免关联产品因永磁电机退磁失效问题出现故障，另一方面避免永磁电机因退磁过热损毁甚至发生火灾。从而解决相关技术中所存在的，退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
具体地，通过在永磁电机机组停机且永磁电机中的转子保持转动的情况下获取永磁电机的转子转速和输入电压，一方面可以避免巨大的驱动电流和输出侧的谐波干扰输入电压的测量结果，以提升输入电压的精度，提升退磁参数的可靠性。同时，在电机断电后的短时间内进行测量，永磁电机中转子内的永磁体的状态与正常工作过程中的状态差异较小，根据转子转速和输入电压所确定出的退磁参数可以有效反映出退磁现象在工作过程中所带来的影响，以便于将退磁参数作为排查永磁体风险的工具。另一方面，在永磁电机后获取永磁电机的转子转速和输入电压可以在不额外增加电机工作时长的基础上完成永磁体退磁风险的监测，从而消除监测过程对电机正常工作的影响。进而实现优化永磁电机的检测方法，提升永磁电机的安全性和可靠性，为用户提供便利条件的技术效果。
另外，根据本公开提供的上述技术方案中的永磁电机的检测方法，还可以具有如下附加技术特征：
在上述技术方案中，退磁参数包括磁场衰减参数，根据输入电压和转子转速确定永磁体的退磁参数的步骤，包括：
根据输入电压和转子转速确定永磁体的当前磁场强度；
根据当前磁场强度和预设的标定磁场强度确定磁场衰减参数，其中，当前磁场强度与磁场衰减参数负相关。
在该技术方案中，退磁参数包括永磁体的磁场衰减参数，磁场衰减参数对应于永磁体的退磁幅度。在此基础上展开说明，停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压这一步骤。
具体地，在获取到永磁电机的转子转速和输入电压后，通过转子转速和输入电压得出对应于永磁体当前状态的当前磁场强度。其中，当前磁场强度与永磁体的磁性直接关联，永磁体的退磁幅度越大，磁性越弱，对应磁场强度越低。
在确定出当前磁场强度后，通过预存的标定磁场强度和当前磁场强度确定出永磁体的磁场衰减参数。其中，标定磁场强度仅与永磁电机的自身结构以及永磁体自身属性相关联，与实际工况无关，在完成永磁电机的设计后，即可得到恒定的标定磁场强度。标定磁场强度和当前磁场强度之间的差值即对应于永磁体磁性的衰减幅度，当前磁场强度越小，其与标定磁场强度的差值越大，对应磁场衰减参数越大，因此当前磁场强度与磁场衰减参数负相关。
由此可见，该技术方案所确定出的磁场衰减参数可以使用户直观地了解到永磁体的退磁幅度，用户可以根据磁场衰减参数及时对永磁体进行维护或更换，以避免出现永磁电机失效甚至损毁的问题。进而实现提升永磁电机实用性和可靠性的技术效果。
其中，可以将标定磁场强度和当前磁场强度的差值作为衰减参数，也可以将标定磁场强度与当前磁场强度的比值作为衰减参数，对此该技术方案中不做硬性限定。
在上述任一技术方案中，永磁电机的检测方法还包括：基于磁场衰减参数大于等于第一阈值，发出第一报警信息。
在该技术方案中，承接前述技术方案，在确定出磁场衰减参数后，比对磁场衰减参数和预设的第一阈值间的大小关系。在磁场衰减参数大于等于第一阈值的情况下，发出第一报警信息。其中，第一阈值用于界定永磁电机的工作能力，在磁场衰减参数小于第一阈值的情况下，代表当前永磁体的退磁幅度在可承受范围内，永磁电机的工作状态可以满足产品的功能需求。反之，在磁场衰减参数大于等于第一阈值的情况下，代表当前永磁体的退磁幅度已影响到永磁电机的正常工作，导致永磁电机可能出现力矩降低、效率降低、输入电流增加、永磁体过热的问题。
由此可见，通过在确定出磁场衰减参数大于等于第一阈值的情况下发出第一报警信息，可以实现永磁电机的风险自动排查功能。使永磁电机可以借助第一报警信息提醒用户永磁电机存在风险，以便于用户及时通过维护永磁体或更换永磁体消除风险。进而实现提升永磁电机自智能化程度，提升永磁电机安全性和可靠性，提升用户使用体验的技术效果。
其中，第一报警信息包括蜂鸣报警、震动报警、闪光报警等，此类报警可以引起附近用户的注意，以提示用户维护和更换永磁体。第一报警信息还可以发送至产品显示器或用户所持的移动终端中，从而将第一报警信息以推送信息的方式显示在产品显示器或移动终端上，以便于用户及时消除风险。对此，该技术方案不对第一报警信息的具体形式做硬性限定，满足报警提示需求即可。
在上述任一技术方案中，退磁参数包括温升参数，根据输入电压和转子转速确定永磁体的退磁参数，包括：
根据输入电压和转子转速确定永磁体的当前温度；
根据当前温度和预设的标准温度确定温升参数，其中，当前温度和温升参数正相关。
在该技术方案中，退磁参数包括永磁体的温升参数，温升参数对应于永磁体的退磁 幅度。在此基础上展开说明，停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压这一步骤。
具体地，在获取到永磁电机的转子转速和输入电压后，通过转子转速和输入电压得出对应于永磁体当前状态的当前温度。其中，当前温度与永磁体的磁性直接关联，永磁体的退磁幅度越大，磁性越弱，对应温度越高。
在确定出当前温度后，通过预存的标准温度和当前温度确定出永磁体的温升参数。其中，标准温度与永磁电机的自身结构以及永磁体自身属性相关联，在完成永磁电机的设计后，即可得到标准温度，标准温度对应于永磁电机的正常工作温度。当前温度和标准温度之间的差值对应于永磁体磁性的衰减幅度，当前温度越高，其与标准温度的差值越大，对应温升参数越大，因此当前温度与温升参数正相关。
由此可见，该技术方案所确定出的温升参数可以使用户直观地了解到永磁体的工作温度和永磁体的退磁幅度，一方面使用户可以根据温升参数判断永磁电机是否存在高温损毁风险。另一方面使用户可以根据温升参数及时对永磁体进行维护或更换，以避免出现永磁电机失效甚至损毁的问题。进而实现提升永磁电机实用性和可靠性的技术效果。
其中，可以将当前温度和标准温度的差值作为衰减参数，也可以将当前温度与标准温度的比值作为衰减参数，对此该技术方案中不做硬性限定。
在上述任一技术方案中，检测方法还包括：基于温升参数大于等于第二阈值，发出第二报警信息。
在该技术方案中，承接前述技术方案，在确定出温升参数后，比对温升参数和预设的第二阈值间的大小关系。在温升参数大于等于第二阈值的情况下，发出第二报警信息。其中，第二阈值用于界定永磁电机的工作能力，在温升参数小于第二阈值的情况下，代表当前永磁体的退磁幅度在可承受范围内，永磁电机的工作状态可以满足产品的功能需求。反之，在温升参数大于等于第二阈值的情况下，代表当前永磁体的退磁幅度已影响到永磁电机的正常工作，导致永磁电机可能出现力矩降低、效率降低、输入电流增加、永磁体过热的问题。
由此可见，通过在确定出温升参数大于等于第二阈值的情况下发出第二报警信息，可以实现永磁电机的风险自动排查功能。使永磁电机可以借助第二报警信息提醒用户永磁电机存在风险，以便于用户及时通过维护永磁体或更换永磁体消除风险。进而实现提升永磁电机自智能化程度，提升永磁电机安全性和可靠性，提升用户使用体验的技术效果。
其中，第二报警信息包括蜂鸣报警、震动报警、闪光报警等，此类报警可以引起附近用户的注意，以提示用户维护和更换永磁体。第二报警信息还可以发送至产品显示器或用户所持的移动终端中，从而将第二报警信息以推送信息的方式显示在产品显示器或移动终端上，以便于用户及时消除风险。对此，该技术方案不对第二报警信息的具体形式做硬性限定，满足报警提示需求即可。
在上述任一技术方案中，永磁电机的检测方法还包括：
基于温升参数和历史值之间的差值大于等于第三阈值，发出提示信息；
存储温升参数，并将温升参数作为历史值。
在该技术方案中，通过预存的标准温度和当前温度确定出永磁体的温升参数的步骤后。计算此次检测所得到的温升参数与历时值之间的差值，其后比对计算出的差值和预设的第三阈值之间的大小关系。其中，若差值小于第三阈值，则直接存储此次检测所得到的温升参数，并将该温升参数作为历时值，以便于比对下次检测的变化幅度。反之，若差值大于或等于第三阈值，则先发出提示信息，并在发出提示信息后存储此次检测所得到的温升参数，并将该温升参数作为历时值。
通过计算当前温升参数和历史温升参数之间的差值，可以确定出此次检测结果与上次检测结果之间的变化幅度。其中，第三阈值用于界定永磁体的退磁情况是否属于常规退磁。若当前温升参数和历史温升参数之间的差值小于第三阈值，则说明属于常规退磁范畴内。若当前温升参数和历史温升参数之间的差值大于等于第三阈值，则说明永磁体温升异常，可能包括其他温升原因。随即通过发出提示信息提醒用户排查永磁电机上的其他故障。例如，永磁电机的冷却机构的工作状态与永磁体的温度直接关联，若冷却机构能够正常工作，则永磁体的温升可能主要来自于退磁问题。若冷却机构故障，则永磁体的温升参数会超出合理范围。所发出的提示信息即可用于排查此类问题。进而实现提升永磁电机自智能化程度，提升永磁电机安全性和可靠性，提升用户使用体验的技术效果。
其中，提示信息包括蜂鸣报警、震动报警、闪光报警等，此类报警可以引起附近用户的注意，以提示用户维护和更换永磁体。提示信息还可以发送至产品显示器或用户所持的移动终端中，从而将提示信息以推送信息的方式显示在产品显示器或移动终端上，以便于用户及时消除风险。对此，该技术方案不对提示信息的具体形式做硬性限定，满足报警提示需求即可。
在上述任一技术方案中，在永磁电机停机且转子保持转动的情况下，获取永磁电机的输入电压和转子转速的步骤，包括：
响应于永磁电机的停机指令，获取永磁电机的输入电流；
基于输入电流小于等于第四阈值，获取永磁电机的输入电压和转子转速。
在该技术方案中，展开说明，在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压这一步骤。
具体地，在永磁电机接收到停机指令时，获取永磁电机的输入电流。其中，该输入电流对应于永磁电机的实际输入，在永磁电机断电后的短时间内，永磁电机的输入电流可能大于零。在获取到输入电流后，比对预设的第四阈值和输入电流之间的大小关系，其中第四阈值对应于永磁电机停机后输入电流测量的合理误差，若确定出输入电流小于等于第四阈值，则可以认定永磁电机彻底断电，随即获取永磁电机转子转速和输入电压。反之若确定出输入电流大于第四阈值，则说明驱动变频器和永磁电机输入端之间还存在输入电流，随即循环检测输入电流，直至输入电流小于第四阈值。
通过限定上述控制方法，可以确保所获取到的转子转速和输入电压不会受到驱动电流和输出侧的谐波的干扰，以提升退磁参数的可靠性。同时，该循环检测方法可以确保 该检测步骤在永磁电机彻底断电后的第一时间介入，以降低永磁体自身冷却所带来的检测误差，从而进一步提升退磁参数的可靠性。进而实现优化永磁电机的检测方法，提升退磁检测精度的技术效果。
本公开的一些实施例提出了一种永磁电机的检测装置，检测装置包括：
获取模块，用于在永磁电机停机且转子保持转动的情况下，获取永磁电机的输入电压和转子转速；
确定模块，用于根据输入电压和转速确定永磁体的退磁参数。
本公开提出了一种永磁电机的检测装置。永磁电机包括转子，转子中安装有永磁体，以通过永磁体提供励磁。
相关技术中，提供励磁的永磁体隐藏在永磁电机内部，导致永磁体的状态无法被检测装置直接测量，致使永磁体的退磁情况无法被监控。当永磁体的退磁幅度达到一定程度时，永磁电机所提供的力矩会降低，电机效率会受到影响，导致关联产品出现故障。并且，永磁体退磁现象还会增大输入电流，导致永磁工作温度增高，严重时会烧毁电机绕组并产生安全问题。因此，永磁电机存在退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
对此，本公开提出的永磁电机的检测装置包括获取模块和确定模块。
获取模块用于在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压。其中，获取转子转速和输入电压的前提是转子没有停止转动，永磁电机的输入电压指的是与永磁电机相连接的驱动变频器的输出端的电压，同样是永磁电机的输入端的电压。
确定模块用于在获取到永磁电机的输入电压和转子转速后，通过转子转速以及输入电压得出永磁电机内部永磁体的退磁参数。其中，永磁体的退磁参数可以反映出永磁体的当前退磁幅度，用户可通过得到的退磁参数选择是否对永磁体进行维护或更换。
由此可见，本公开通过限定上述检测装置，使用户可以根据该检测装置所检测出的永磁体退磁参数了解到该永磁体当前的退磁情况，以便于指引用户在永磁体的退磁幅度影响永磁电机的正常工作前通过维护或更换永磁体来排查掉永磁电机因永磁体退磁所带来的风险。实现对永磁电机中永磁体的监控和风险排查，一方面避免关联产品因永磁电机退磁失效问题出现故障，另一方面避免永磁电机因退磁过热损毁甚至发生火灾。从而解决相关技术中所存在的，退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
具体地，通过在永磁电机机组停机且永磁电机中的转子保持转动的情况下获取永磁电机的转子转速和输入电压，一方面可以避免巨大的驱动电流和输出侧的谐波干扰输入电压的测量结果，以提升输入电压的精度，提升退磁参数的可靠性。同时，在电机断电后的短时间内进行测量，永磁电机中转子内的永磁体的状态与正常工作过程中的状态差异较小，根据转子转速和输入电压所确定出的退磁参数可以有效反映出退磁现象在工作过程中所带来的影响，以便于将退磁参数作为排查永磁体风险的工具。另一方面，在永磁电机后获取永磁电机的转子转速和输入电压可以在不额外增加电机工作时长的基础上完成永磁体退磁风险的监测，从而消除监测过程对电机正常工作的影响。进而实现优 化永磁电机的检测装置，提升永磁电机的安全性和可靠性，为用户提供便利条件的技术效果。
本公开的一些实施例提出了一种永磁电机的检测装置，永磁电机的检测装置包括：存储器，其上存储有程序或指令；处理器，配置为执行程序或指令时实现如上述一些实施例中的永磁电机的检测方法的步骤，因而具有上述一些实施例中永磁电机的检测方法的全部有益效果。
本公开的一些实施例提出了一种可读存储介质，其上存储有程序或指令，程序或指令被处理器执行时实现如上述的一些实施例中的永磁电机的检测方法的步骤，因而具有上述一些实施例中永磁电机的检测方法的全部有益效果。
本公开的一些实施例提出了一种永磁电机，包括如上述一些实施例的永磁电机的检测装置或另一些实施例中的永磁电机的检测装置或一些实施例中的可读存储介质。因而具有上述一些实施例中的永磁电机的检测装置的全部有益效果或另一些实施例中的永磁电机的检测装置的全部有益效果或上述实施例中的可读存储介质的全部有益效果。
在上述任一技术方案中，永磁电机包括：电机主体；接入端，设于电机主体，用于连接驱动变频器。
在该技术方案中，对永磁电机的结构作出说明。具体地，永磁电机包括电机主体，电机主体包包括定子组件、转子组件和接入端。接入端用于连接驱动变频器，驱动变频器用于向电机主体供电。
其中，驱动变频器包括相连接的整流器和逆变器，逆变器通过接入端连接电机主体。驱动变频器还包括驱动控制器，驱动控制器包括加减速运算器和脉冲宽度调制器。
在上述任一技术方案中，永磁电机还包括：第一传感器，与接入端连接，用于感测输入电压，检测装置与第一传感器连接。
在该技术方案中，永磁电机还包括第一传感器。具体地，第一传感器设置在接入端上，位于电机主体和逆变器之间，第一传感器用于感测永磁电机的输入电压。其中，检测装置与第一传感器连接，检测装置由第一传感器处获取输入电压。
在上述任一技术方案中，永磁电机还包括：第二传感器，设于电机主体，用于感测转子转速，检测装置与第二传感器连接。
在该技术方案中，永磁电机还包括第二传感器。具体地，第二传感器安装在电机主体上，第二传感器用于测量永磁电机中转子组件的转子转速。其中，检测装置与第二传感器连接，检测装置由第二传感器处获取转子转速。
在上述任一技术方案中，电机主体包括转子轴，转子轴的周侧面设置有测量部；第二传感器与测量部所处环面相对设置。
在该技术方案中，对第二传感器的结构作出限定。具体地，转子组件包括转子和转子轴。转子轴的周侧面设置有测量部，该测量部可以使凹槽结构。第二传感器设置在转子轴的周侧，且与转子轴的周侧面间隔设置。第二传感器上的侧两端与转子轴周侧面上设置有测量部的环面相对设置，以使转子轴美转过一周测量部可被第二传感器感测到一次，从而测量出与转子轴同步转动的转子的转子转速。其中，第二传感器包可以为电磁感应式传感器，还可以为光电式传感器。
本公开的一些实施例提出了一种压缩机，包括如上述一些实施例的永磁电机。因而具有上述一些实施例中的永磁电机的全部有益效果。本公开的一些实施例提出了一种暖通设备，包括如上述一些实施例的压缩机。因而具有上述一些实施例中的压缩机的全部有益效果。
本公开的附加方面和优点将在下面的描述部分中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1示出本公开的至少一个实施例提供的永磁电机的检测方法的流程示意图之一；
图2示出本公开的至少一个实施例提供的永磁电机的检测方法的流程示意图之二；
图3示出本公开的至少一个实施例提供的永磁电机的检测方法的流程示意图之三；
图4示出本公开的至少一个实施例提供的永磁电机的检测方法的流程示意图之四；
图5示出本公开的至少一个实施例提供的永磁电机的检测方法的流程示意图之五；
图6示出本公开的至少一个实施例提供的永磁电机在停机后的参数变化趋势图；
图7示出本公开的至少一个实施例提供的永磁电机的检测方法的流程示意图之六；
图8示出本公开的至少一个实施例提供的地面清洁设备的控制装置的结构框图；
图9示出本公开的至少一个实施例提供的地面清洁设备的控制装置的结构框图；
图10示出本公开的至少一个实施例提供的地面清洁设备的结构框图；
图11示出本公开的至少一个实施例提供的永磁电机的结构示意图之一；
图12示出本公开的至少一个实施例提供的永磁电机的结构示意图之二。
其中，图11和图12中附图标记与部件名称之间的对应关系为：
100永磁电机，110电机主体，112转子轴，114测量部，120接入端，130第一传感器，140第二传感器，150检测装置，210整流器，220逆变器，230驱动控制器，232加减速运算器，234脉冲宽度调制器。
具体实施方式
为了能够更清楚地理解本公开的上述目的、特征和优点，下面结合附图和具体实施方式对本公开进行进一步的详细描述。需要说明的是，在不冲突的情况下，本公开的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本公开，但是，本公开还可以采用其他不同于在此描述的其他方式来实施，因此，本公开的保护范围并不受下面公开的具体实施例的限制。
下面参照图1至图12来描述根据本公开一些实施例提供的永磁电机的检测方法、装置、可读存储介质和永磁电机。
如图1所示，本公开的一些实施例提供了一种永磁电机的检测方法，永磁电机包括永磁体，永磁电机的检测方法包括：
步骤102，在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压；
步骤104，通过转子转速以及输入电压确定永磁电机内部永磁体的退磁参数。
本公开提出了一种永磁电机的检测方法。永磁电机包括转子，转子中安装有永磁体，以通过永磁体提供励磁。
相关技术中，提供励磁的永磁体隐藏在永磁电机内部，导致永磁体的状态无法被检测装置直接测量，致使永磁体的退磁情况无法被监控。当永磁体的退磁幅度达到一定程度时，永磁电机所提供的力矩会降低，电机效率会受到影响，导致关联产品出现故障。并且，永磁体退磁现象还会增大输入电流，导致永磁工作温度增高，严重时会烧毁电机绕组并产生安全问题。因此，永磁电机存在退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
对此，本公开提出的永磁电机的检测方法如下：
首先，在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压。其中，获取转子转速和输入电压的前提是转子没有停止转动，永磁电机的输入电压指的是与永磁电机相连接的驱动变频器的输出端的电压，同样是永磁电机的输入端的电压。
在获取到永磁电机的输入电压和转子转速后，通过转子转速以及输入电压得出永磁电机内部永磁体的退磁参数。其中，永磁体的退磁参数可以反映出永磁体的当前退磁幅度，用户可通过得到的退磁参数选择是否对永磁体进行维护或更换。
由此可见，本公开通过限定上述检测方法，使用户可以根据该检测方法所检测出的永磁体退磁参数了解到该永磁体当前的退磁情况，以便于指引用户在永磁体的退磁幅度影响永磁电机的正常工作前通过维护或更换永磁体来排查掉永磁电机因永磁体退磁所带来的风险。实现对永磁电机中永磁体的监控和风险排查，一方面避免关联产品因永磁电机退磁失效问题出现故障，另一方面避免永磁电机因退磁过热损毁甚至发生火灾。从而解决相关技术中所存在的，退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
具体地，如图6所示，通过在永磁电机机组停机且永磁电机中的转子保持转动的情况下获取永磁电机的转子转速和输入电压，一方面可以避免巨大的驱动电流和输出侧的谐波干扰输入电压的测量结果，以提升输入电压的精度，提升退磁参数的可靠性。同时，在电机断电后的短时间内进行测量，永磁电机中转子内的永磁体的状态与正常工作过程中的状态差异较小，根据转子转速和输入电压所确定出的退磁参数可以有效反映出退磁现象在工作过程中所带来的影响，以便于将退磁参数作为排查永磁体风险的工具。另一方面，在永磁电机后获取永磁电机的转子转速和输入电压可以在不额外增加电机工作时长的基础上完成永磁体退磁风险的监测，从而消除监测过程对电机正常工作的影响。进而实现优化永磁电机的检测方法，提升永磁电机的安全性和可靠性，为用户提供便利条件的技术效果。其中，图6中阴影部分对应于本公开的采集区间。
如图2所示，退磁参数包括磁场衰减参数，根据输入电压和转子转速确定永磁体的退磁参数的步骤，包括：
步骤202，在获取到永磁电机的转子转速和输入电压后，通过转子转速和输入电压得出对应于永磁体当前状态的当前磁场强度；
步骤204，通过预存的标定磁场强度和当前磁场强度确定出永磁体的磁场衰减参数。
在该实施例中，退磁参数包括永磁体的磁场衰减参数，磁场衰减参数对应于永磁体的退磁幅度。在此基础上展开说明，停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压这一步骤。
具体地，在获取到永磁电机的转子转速和输入电压后，通过转子转速和输入电压得出对应于永磁体当前状态的当前磁场强度。其中，当前磁场强度与永磁体的磁性直接关联，永磁体的退磁幅度越大，磁性越弱，对应磁场强度越低。
在确定出当前磁场强度后，通过预存的标定磁场强度和当前磁场强度确定出永磁体的磁场衰减参数。其中，标定磁场强度仅与永磁电机的自身结构以及永磁体自身属性相关联，与实际工况无关，在完成永磁电机的设计后，即可得到恒定的标定磁场强度。标定磁场强度和当前磁场强度之间的差值即对应于永磁体磁性的衰减幅度，当前磁场强度越小，其与标定磁场强度的差值越大，对应磁场衰减参数越大，因此当前磁场强度与磁场衰减参数负相关。
由此可见，该实施例所确定出的磁场衰减参数可以使用户直观地了解到永磁体的退磁幅度，用户可以根据磁场衰减参数及时对永磁体进行维护或更换，以避免出现永磁电机失效甚至损毁的问题。进而实现提升永磁电机实用性和可靠性的技术效果。
其中，可以将标定磁场强度和当前磁场强度的差值作为衰减参数，也可以将标定磁场强度与当前磁场强度的比值作为衰减参数，对此该实施例中不做硬性限定。
永磁电机的检测方法还包括：基于磁场衰减参数大于等于第一阈值，发出第一报警信息。
在该实施例中，承接前述实施例，在确定出磁场衰减参数后，比对磁场衰减参数和预设的第一阈值间的大小关系。在磁场衰减参数大于等于第一阈值的情况下，发出第一报警信息。其中，第一阈值用于界定永磁电机的工作能力，在磁场衰减参数小于第一阈值的情况下，代表当前永磁体的退磁幅度在可承受范围内，永磁电机的工作状态可以满足产品的功能需求。反之，在磁场衰减参数大于等于第一阈值的情况下，代表当前永磁体的退磁幅度已影响到永磁电机的正常工作，导致永磁电机可能出现力矩降低、效率降低、输入电流增加、永磁体过热的问题。
由此可见，通过在确定出磁场衰减参数大于等于第一阈值的情况下发出第一报警信息，可以实现永磁电机的风险自动排查功能。使永磁电机可以借助第一报警信息提醒用户永磁电机存在风险，以便于用户及时通过维护永磁体或更换永磁体消除风险。进而实现提升永磁电机自智能化程度，提升永磁电机安全性和可靠性，提升用户使用体验的技术效果。
其中，第一报警信息包括蜂鸣报警、震动报警、闪光报警等，此类报警可以引起附近用户的注意，以提示用户维护和更换永磁体。第一报警信息还可以发送至产品显示器或用户所持的移动终端中，从而将第一报警信息以推送信息的方式显示在产品显示器或 移动终端上，以便于用户及时消除风险。对此，该实施例不对第一报警信息的具体形式做硬性限定，满足报警提示需求即可。
如图3所示，退磁参数包括温升参数，根据输入电压和转子转速确定永磁体的退磁参数，包括：
步骤302，通过转子转速和输入电压得出对应于永磁体当前状态的当前温度；
步骤304，通过预存的标准温度和当前温度确定出永磁体的温升参数。
在该实施例中，退磁参数包括永磁体的温升参数，温升参数对应于永磁体的退磁幅度。在此基础上展开说明，停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压这一步骤。
具体地，在获取到永磁电机的转子转速和输入电压后，通过转子转速和输入电压得出对应于永磁体当前状态的当前温度。其中，当前温度与永磁体的磁性直接关联，永磁体的退磁幅度越大，磁性越弱，对应温度越高。
在确定出当前温度后，通过预存的标准温度和当前温度确定出永磁体的温升参数。其中，标准温度与永磁电机的自身结构以及永磁体自身属性相关联，在完成永磁电机的设计后，即可得到标准温度，标准温度对应于永磁电机的正常工作温度。当前温度和标准温度之间的差值对应于永磁体磁性的衰减幅度，当前温度越高，其与标准温度的差值越大，对应温升参数越大，因此当前温度与温升参数正相关。
由此可见，该实施例所确定出的温升参数可以使用户直观地了解到永磁体的工作温度和永磁体的退磁幅度，一方面使用户可以根据温升参数判断永磁电机是否存在高温损毁风险。另一方面使用户可以根据温升参数及时对永磁体进行维护或更换，以避免出现永磁电机失效甚至损毁的问题。进而实现提升永磁电机实用性和可靠性的技术效果。
其中，可以将当前温度和标准温度的差值作为衰减参数，也可以将当前温度与标准温度的比值作为衰减参数，对此该实施例中不做硬性限定。
检测方法还包括：基于温升参数大于等于第二阈值，发出第二报警信息。
在该实施例中，承接前述实施例，在确定出温升参数后，比对温升参数和预设的第二阈值间的大小关系。在温升参数大于等于第二阈值的情况下，发出第二报警信息。其中，第二阈值用于界定永磁电机的工作能力，在温升参数小于第二阈值的情况下，代表当前永磁体的退磁幅度在可承受范围内，永磁电机的工作状态可以满足产品的功能需求。反之，在温升参数大于等于第二阈值的情况下，代表当前永磁体的退磁幅度已影响到永磁电机的正常工作，导致永磁电机可能出现力矩降低、效率降低、输入电流增加、永磁体过热的问题。
由此可见，通过在确定出温升参数大于等于第二阈值的情况下发出第二报警信息，可以实现永磁电机的风险自动排查功能。使永磁电机可以借助第二报警信息提醒用户永磁电机存在风险，以便于用户及时通过维护永磁体或更换永磁体消除风险。进而实现提升永磁电机自智能化程度，提升永磁电机安全性和可靠性，提升用户使用体验的技术效果。
其中，第二报警信息包括蜂鸣报警、震动报警、闪光报警等，此类报警可以引起附 近用户的注意，以提示用户维护和更换永磁体。第二报警信息还可以发送至产品显示器或用户所持的移动终端中，从而将第二报警信息以推送信息的方式显示在产品显示器或移动终端上，以便于用户及时消除风险。对此，该实施例不对第二报警信息的具体形式做硬性限定，满足报警提示需求即可。
如图4所示，永磁电机的检测方法还包括：
步骤402，计算此次检测所得到的温升参数与历时值之间的差值，其后比对计算出的差值和预设的第三阈值之间的大小关系，若差值大于或等于第三阈值，则发出提示信息；
步骤404，存储温升参数，并将温升参数作为历史值。
在该实施例中，通过预存的标准温度和当前温度确定出永磁体的温升参数的步骤后。计算此次检测所得到的温升参数与历时值之间的差值，其后比对计算出的差值和预设的第三阈值之间的大小关系。其中，若差值小于第三阈值，则直接存储此次检测所得到的温升参数，并将该温升参数作为历时值，以便于比对下次检测的变化幅度。反之，若差值大于或等于第三阈值，则先发出提示信息，并在发出提示信息后存储此次检测所得到的温升参数，并将该温升参数作为历时值。
通过计算当前温升参数和历史温升参数之间的差值，可以确定出此次检测结果与上次检测结果之间的变化幅度。其中，第三阈值用于界定永磁体的退磁情况是否属于常规退磁。若当前温升参数和历史温升参数之间的差值小于第三阈值，则说明属于常规退磁范畴内。若当前温升参数和历史温升参数之间的差值大于等于第三阈值，则说明永磁体温升异常，可能包括其他温升原因。随即通过发出提示信息提醒用户排查永磁电机上的其他故障。例如，永磁电机的冷却机构的工作状态与永磁体的温度直接关联，若冷却机构能够正常工作，则永磁体的温升可能主要来自于退磁问题。若冷却机构故障，则永磁体的温升参数会超出合理范围。所发出的提示信息即可用于排查此类问题。进而实现提升永磁电机自智能化程度，提升永磁电机安全性和可靠性，提升用户使用体验的技术效果。
其中，提示信息包括蜂鸣报警、震动报警、闪光报警等，此类报警可以引起附近用户的注意，以提示用户维护和更换永磁体。提示信息还可以发送至产品显示器或用户所持的移动终端中，从而将提示信息以推送信息的方式显示在产品显示器或移动终端上，以便于用户及时消除风险。对此，该实施例不对提示信息的具体形式做硬性限定，满足报警提示需求即可。
如图5所示，在永磁电机停机且转子保持转动的情况下，获取永磁电机的输入电压和转子转速的步骤，包括：
步骤502，在永磁电机接收到停机指令时，响应于永磁电机的停机指令，获取永磁电机的输入电流；
步骤504，比对预设的第四阈值和输入电流之间的大小关系，在输入电流小于等于第四阈值的情况下，获取永磁电机的转子转速和输入电压。
在一些实施例中，展开说明，在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电 压这一步骤。
具体地，在永磁电机接收到停机指令时，获取永磁电机的输入电流。其中，该输入电流对应于永磁电机的实际输入，在永磁电机断电后的短时间内，永磁电机的输入电流可能大于零。在获取到输入电流后，比对预设的第四阈值和输入电流之间的大小关系，其中第四阈值对应于永磁电机停机后输入电流测量的合理误差，若确定出输入电流小于等于第四阈值，则可以认定永磁电机彻底断电，随即获取永磁电机转子转速和输入电压。反之若确定出输入电流大于第四阈值，则说明驱动变频器和永磁电机输入端之间还存在输入电流，随即循环检测输入电流，直至输入电流小于第四阈值。
通过限定上述控制方法，可以确保所获取到的转子转速和输入电压不会受到驱动电流和输出侧的谐波的干扰，以提升退磁参数的可靠性。同时，该循环检测方法可以确保该检测步骤在永磁电机彻底断电后的第一时间介入，以降低永磁体自身冷却所带来的检测误差，从而进一步提升退磁参数的可靠性。进而实现优化永磁电机的检测方法，提升退磁检测精度的技术效果。
如图7所示，在本公开的一些实施例中，提出了一种具体工作流程，其中各工作步骤如下：
步骤702，接收停机指令；
步骤704，驱动变频器输出断电；
步骤706，检测变频器向永磁电机输出的输入电流；
步骤708，判断输入电流是否小于等于第四阈值；
其中，判断结果为是执行步骤710和步骤712，判断结果为否执行步骤706；
步骤710，测量永磁电机的输入电压；
步骤712，测量永磁电机的转子转速；
步骤714，确定出永磁体的当前磁场强度和当前温度；
步骤716，计算磁场衰减参数；
步骤718，计算温升参数；
步骤720，结合标定磁场强度对永磁体进行健康度评估；
步骤722，结合标准温度对永磁体进行健康度评估；
步骤724，判断是否存在隐患；
其中，判断结果为是执行步骤726，判断结果为否结束；
步骤726，发出报警提示。
如图8所示，本公开的一些实施例提出了一种永磁电机的检测装置800，永磁电机的检测装置800包括：获取模块802，用于在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压；确定模块804，通过转子转速以及输入电压确定永磁电机内部永磁体的退磁参数。
本公开提出了一种永磁电机的检测装置800。永磁电机包括转子，转子中安装有永磁体，以通过永磁体提供励磁。
相关技术中，提供励磁的永磁体隐藏在永磁电机内部，导致永磁体的状态无法被检测装置直接测量，致使永磁体的退磁情况无法被监控。当永磁体的退磁幅度达到一定程度时，永磁电机所提供的力矩会降低，电机效率会受到影响，导致关联产品出现故障。并且，永磁体退磁现象还会增大输入电流，导致永磁工作温度增高，严重时会烧毁电机绕组并产生安全问题。因此，永磁电机存在退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
对此，本公开提出的永磁电机的检测装置800包括获取模块802和确定模块804。
获取模块802用于在停止向永磁电机供电后，永磁电机上的转子在惯性作用下保持转动，在此过程中获取永磁电机的转子转速，并同时获取永磁电机的输入电压。其中，获取转子转速和输入电压的前提是转子没有停止转动，永磁电机的输入电压指的是与永磁电机相连接的驱动变频器的输出端的电压，同样是永磁电机的输入端的电压。
确定模块804用于在获取到永磁电机的输入电压和转子转速后，通过转子转速以及输入电压得出永磁电机内部永磁体的退磁参数。其中，永磁体的退磁参数可以反映出永磁体的当前退磁幅度，用户可通过得到的退磁参数选择是否对永磁体进行维护或更换。
由此可见，本公开通过限定上述检测装置，使用户可以根据该检测装置所检测出的永磁体退磁参数了解到该永磁体当前的退磁情况，以便于指引用户在永磁体的退磁幅度影响永磁电机的正常工作前通过维护或更换永磁体来排查掉永磁电机因永磁体退磁所带来的风险。实现对永磁电机中永磁体的监控和风险排查，一方面避免关联产品因永磁电机退磁失效问题出现故障，另一方面避免永磁电机因退磁过热损毁甚至发生火灾。从而解决相关技术中所存在的，退磁状况无法掌控，风险无法及时排查，安全性和可靠性差的技术问题。
具体地，通过在永磁电机机组停机且永磁电机中的转子保持转动的情况下获取永磁电机的转子转速和输入电压，一方面可以避免巨大的驱动电流和输出侧的谐波干扰输入电压的测量结果，以提升输入电压的精度，提升退磁参数的可靠性。同时，在电机断电后的短时间内进行测量，永磁电机中转子内的永磁体的状态与正常工作过程中的状态差异较小，根据转子转速和输入电压所确定出的退磁参数可以有效反映出退磁现象在工作过程中所带来的影响，以便于将退磁参数作为排查永磁体风险的工具。另一方面，在永磁电机后获取永磁电机的转子转速和输入电压可以在不额外增加电机工作时长的基础上完成永磁体退磁风险的监测，从而消除监测过程对电机正常工作的影响。进而实现优化永磁电机的检测装置800，提升永磁电机的安全性和可靠性，为用户提供便利条件的技术效果。
如图9所示，本公开的一些实施例提出了一种永磁电机的检测装置900，永磁电机的检测装置900包括：存储器902，其上存储有程序或指令；处理器904，配置为执行程序或指令时实现如上述一些实施例中的永磁电机的检测方法的步骤，因而具有上述一些实施例中永磁电机的检测方法的全部有益效果。
本公开的一些实施例提出了一种可读存储介质1002，其上存储有程序或指令，程序 或指令被处理器执行时实现如上述一些实施例中的永磁电机的检测方法的步骤，因而具有上述一些实施例中永磁电机的检测方法的全部有益效果。
如图10所示，本公开的一些实施例提出了一种永磁电机1000，包括如上述一些实施例的永磁电机的检测装置800或一些实施例中的永磁电机的检测装置900或一些实施例中的可读存储介质1002。因而具有上述一些实施例中的永磁电机的检测装置800的全部有益效果或一些实施例中的永磁电机的检测装置900的全部有益效果或一些实施例中的可读存储介质1002的全部有益效果。
如图11和图12所示，在上述任一实施例中，永磁电机100包括：电机主体110；接入端120，设于电机主体110，用于连接驱动变频器。
在该实施例中，对永磁电机100的结构作出说明。具体地，永磁电机100包括电机主体110，电机主体110包包括定子组件、转子组件和接入端120。接入端120用于连接驱动变频器，驱动变频器用于向电机主体110供电。
其中，驱动变频器包括相连接的整流器210和逆变器220，逆变器220通过接入端120连接电机主体110。驱动变频器还包括驱动控制器230，驱动控制器230包括加减速运算器232和脉冲宽度调制器234。
在上述任一实施例中，永磁电机100还包括：第一传感器130，与接入端120连接，用于感测输入电压，检测装置150与第一传感器130连接。
在该实施例中，永磁电机100还包括第一传感器130。具体地，第一传感器130设置在接入端120上，位于电机主体110和逆变器220之间，第一传感器130用于感测永磁电机100的输入电压。其中，检测装置150与第一传感器130连接，检测装置150由第一传感器130处获取输入电压。
在上述任一实施例中，永磁电机100还包括：第二传感器140，设于电机主体110，用于感测转子转速，检测装置150与第二传感器140连接。
在该实施例中，永磁电机100还包括第二传感器140。具体地，第二传感器140安装在电机主体110上，第二传感器140用于测量永磁电机100中转子组件的转子转速。其中，检测装置150与第二传感器140连接，检测装置150由第二传感器140处获取转子转速。
在上述任一实施例中，电机主体110包括转子轴112，转子轴112的周侧面设置有测量部114；第二传感器140与测量部114所处环面相对设置。
在该实施例中，对第二传感器140的结构作出限定。具体地，转子组件包括转子和转子轴112。转子轴112的周侧面设置有测量部114，该测量部114可以使凹槽结构。第二传感器140设置在转子轴112的周侧，且与转子轴112的周侧面间隔设置。第二传感器140上的侧两端与转子轴112周侧面上设置有测量部114的环面相对设置，以使转子轴112美转过一周测量部114可被第二传感器140感测到一次，从而测量出与转子轴112同步转动的转子的转子转速。其中，第二传感器140包可以为电磁感应式传感器，还可以为光电式传感器。
本公开的一些实施例提出了一种压缩机，包括如上述一些实施例的永磁电机1000。因而具有上述一些实施例中的永磁电机1000的全部有益效果。
本公开的一些实施例提出了一种暖通设备，包括如上述一些实施例的压缩机。因而具有上述一些实施例中的压缩机的全部有益效果。
本公开的描述中，术语“多个”则指两个或两个以上，除非另有明确的限定，术语“上”、“下”等指示的方位或位置关系为基于附图的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制；术语“连接”、“安装”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
在本公开的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本公开的至少一个实施例或示例中。在本公开中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上仅为本公开的优选实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (17)

  1. 一种永磁电机的检测方法，其中，所述永磁电机包括永磁体和转子，所述检测方法包括：
    在所述永磁电机停机且所述转子保持转动的情况下，获取所述永磁电机的输入电压和转子转速；
    根据所述输入电压和所述转子转速确定所述永磁体的退磁参数。
  2. 根据权利要求1所述的永磁电机的检测方法，其中，所述退磁参数包括磁场衰减参数，所述根据所述输入电压和所述转子转速确定所述永磁体的退磁参数，包括：
    根据所述输入电压和所述转子转速确定所述永磁体的当前磁场强度；
    根据所述当前磁场强度和预设的标定磁场强度确定所述磁场衰减参数，其中，所述当前磁场强度与所述磁场衰减参数负相关。
  3. 根据权利要求2所述的永磁电机的检测方法，其中，还包括：
    基于所述磁场衰减参数大于等于第一阈值，发出第一报警信息。
  4. 根据权利要求1所述的永磁电机的检测方法，其中，所述退磁参数包括温升参数，所述根据所述输入电压和所述转子转速确定所述永磁体的退磁参数，包括：
    根据所述输入电压和所述转子转速确定所述永磁体的当前温度；
    根据所述当前温度和预设的标准温度确定所述温升参数，其中，所述当前温度和所述温升参数负相关。
  5. 根据权利要求4所述的永磁电机的检测方法，其中，还包括：
    基于所述温升参数大于等于第二阈值，发出第二报警信息。
  6. 根据权利要求4所述的永磁电机的检测方法，其中，还包括：
    基于所述温升参数和历史值之间的差值大于等于第三阈值，发出提示信息；
    存储所述温升参数，并将所述温升参数作为所述历史值。
  7. 根据权利要求1至6中任一项所述的永磁电机的检测方法，其中，所述在所述永磁电机停机且所述转子保持转动的情况下，获取所述永磁电机的输入电压和转子转速，包括：
    响应于所述永磁电机的停机指令，获取所述永磁电机的输入电流；
    基于所述输入电流小于等于第四阈值，获取所述永磁电机的所述输入电压和所述转子转速。
  8. 一种永磁电机的检测装置，其中，所述检测装置包括：
    获取模块，用于在所述永磁电机停机且转子保持转动的情况下，获取所述永磁电机的输入电压和转子转速；
    确定模块，用于根据所述输入电压和所述转速确定永磁体的退磁参数。
  9. 一种永磁电机的检测装置，其中，包括：
    存储器，其上存储有程序或指令；
    处理器，配置为执行所述程序或指令时实现如权利要求1至7中任一项所述的永磁电机的检测方法的步骤。
  10. 一种可读存储介质，其上存储有程序或指令，其中，所述程序或指令被处理器 执行时实现如权利要求1至7中任一项所述的检测方法的步骤。
  11. 一种永磁电机，其中，包括：
    如权利要求8或9所述的永磁电机的检测装置；或
    如权利要求10所述的可读存储介质。
  12. 根据权利要求11所述的永磁电机，其中，包括：
    电机主体；
    接入端，设于所述电机主体，用于连接驱动变频器。
  13. 根据权利要求12所述的永磁电机，其中，还包括：
    第一传感器，与所述接入端连接，用于感测所述输入电压，所述检测装置与所述第一传感器连接。
  14. 根据权利要求12所述的永磁电机，其中，还包括：
    第二传感器，设于所述电机主体，用于感测所述转子转速，所述检测装置与所述第二传感器连接。
  15. 根据权利要求14所述的永磁电机，其中，
    所述电机主体包括转子轴，所述转子轴的周侧面设置有测量部；
    所述第二传感器与所述测量部所处环面相对设置。
  16. 一种压缩机，其中，包括：
    权利要求11至15中任一项所述的永磁电机。
  17. 一种暖通设备，其中，包括：
    权利要求16中所述的压缩机。
PCT/CN2023/087650 2022-05-06 2023-04-11 永磁电机的检测方法、装置、可读存储介质和永磁电机 WO2023213171A1 (zh)

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