CN116852996A - Motor controller, detection method and vehicle - Google Patents
Motor controller, detection method and vehicle Download PDFInfo
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- CN116852996A CN116852996A CN202310799127.3A CN202310799127A CN116852996A CN 116852996 A CN116852996 A CN 116852996A CN 202310799127 A CN202310799127 A CN 202310799127A CN 116852996 A CN116852996 A CN 116852996A
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- 238000001514 detection method Methods 0.000 title claims abstract description 112
- 238000009413 insulation Methods 0.000 claims abstract description 195
- 238000000034 method Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 12
- 238000000556 factor analysis Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a motor controller, a detection method and a vehicle, wherein the motor controller comprises the following components: the device comprises an insulation resistance module, a detection module and a humidity sensor; the detection module is connected with the insulation resistance module and is used for detecting whether insulation faults occur in the insulation resistance module or not; the detection module is also connected with a humidity sensor and is used for detecting humidity information of the humidity sensor after the insulation fault is judged. In the invention, after the motor controller is in fault, whether the motor controller is in insulation fault is firstly analyzed, if the motor controller is in insulation fault, whether the motor controller is in insulation caused by ambient humidity is considered, so that the cause of the fault in the motor controller can be rapidly and accurately judged, and the maintenance cost of the motor controller is reduced.
Description
Technical Field
The present invention relates to the field of motor controllers, and in particular, to a motor controller, a detection method, and a vehicle.
Background
In an electric vehicle, a motor controller plays an important role.
The motor controller converts the electric energy stored in the power battery into the electric energy required by the driving motor according to instructions such as gears, throttle, brake and the like, so as to control the starting operation, advancing and retreating speed, climbing force and other running states of the electric vehicle. The motor controller will also assist in braking the electric vehicle, etc.
The motor controller is one of the key components of the electric vehicle. At present, after the motor controller fails, the motor controller can be directly replaced, and the motor controller is high in price, so that the maintenance cost is high.
Disclosure of Invention
The invention provides a motor controller, a detection method and a vehicle, and aims to solve the problems of high repair cost and the like of the existing motor controller.
According to an aspect of the present invention, there is provided a motor controller including: the device comprises an insulation resistance module, a detection module and a humidity sensor;
the detection module is connected with the insulation resistance module and is used for detecting whether insulation faults occur in the insulation resistance module or not;
the detection module is also connected with the humidity sensor and is used for detecting humidity information of the humidity sensor after judging that an insulation fault occurs.
According to another aspect of the present invention, there is provided a detection method of a motor controller including an insulation resistance module and a humidity sensor, the detection method including:
detecting whether the insulation resistance module has insulation faults or not;
and if the insulation fault is judged to occur, detecting humidity information of the humidity sensor.
According to another aspect of the present invention, there is provided a vehicle including: a whole vehicle controller, a motor and a motor controller as described above;
and the whole vehicle controller is connected with the motor through the motor controller.
In the embodiment of the invention, a humidity sensor is arranged in the motor controller, a detection module detects whether an insulation fault occurs in the insulation resistance module, and after the insulation fault is judged, the humidity information of the humidity sensor is detected to judge whether the insulation fault of the motor controller is related to the ambient humidity. In the invention, after the motor controller is in fault, whether the motor controller is in insulation fault is firstly analyzed, if the motor controller is in insulation fault, whether the motor controller is in insulation caused by ambient humidity is considered, so that the cause of the fault in the motor controller can be rapidly and accurately judged, and the maintenance cost of the motor controller is reduced.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a motor controller according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another motor controller provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of yet another motor controller provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of yet another motor controller provided by an embodiment of the present invention;
fig. 5 is a schematic diagram of a detection method of a motor controller according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another detection method of a motor controller according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of a motor controller according to an embodiment of the present invention. The present embodiment is applicable to a case of a motor controller for a vehicle, which includes, as shown in fig. 1: an insulation resistance module 10, a detection module 11, and a humidity sensor 12; the detection module 11 is connected with the insulation resistance module 10 and is used for detecting whether insulation faults occur in the insulation resistance module 10; the detection module 11 is further connected to the humidity sensor 12, and is configured to detect humidity information of the humidity sensor 12 after determining that an insulation fault occurs.
In this embodiment, the motor controller includes an insulation resistance module 10. It will be appreciated that the insulation resistance module 10 includes insulation resistance provided in the motor controller. And D.C. voltage is applied to the dielectric medium, and after a certain time of polarization process is finished, the resistance corresponding to the leakage current flowing through the dielectric medium is the insulation resistance, so that the insulation resistance is used as the most basic insulation index of the electric equipment and the electric circuit. The resistance of the insulation resistor is generally relatively large, which characterizes the insulation of the electrical device and the electrical line. The resistance of the insulation resistor in the insulation resistor module 10 also reflects the insulation of the motor controller. The insulation resistance module 10 has a smaller resistance value, which indicates that the insulation condition of the motor controller is poor, and indicates that the motor controller has an insulation fault when the insulation condition is seriously deteriorated, and the motor controller in the equipment needs to be repaired or replaced to avoid the safety problem of the equipment.
The motor controller includes a humidity sensor 12. The housing of the motor controller is typically a sealed housing having grooves therein, and typically, when the motor controller is operated in a humid or cold air environment, moisture may easily enter the motor controller and may be deposited in the grooves, based on which the humidity sensor 12 may alternatively be mounted in the grooves in the motor controller housing, but is not limited thereto. The humidity sensor 12 may alternatively be mounted at a location where the housing of the motor controller is prone to cracking, or alternatively near the insulation resistance of the motor controller. The relevant practitioner can reasonably design the installation position of the humidity sensor in the shell of the motor controller according to the requirements of the product, and the installation position of the humidity sensor is not limited in the embodiment of the invention as long as humidity data acquisition can be realized.
Humidity sensor 12 is capable of monitoring the ambient humidity at the location, and in particular, continuously monitoring small changes in the atmosphere to calculate the air humidity, wherein the humidity value is represented by the percentage of moisture contained in the air. The humidity sensor 12 uses a probe as a test element to collect a humidity signal, and converts the humidity signal into a current signal or a voltage signal which is in linear relation with the humidity and outputs the current signal or the voltage signal after the humidity signal is processed by circuits such as voltage stabilizing filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse protection. The type of the humidity sensor is not limited in the embodiment of the present invention, and for example, the humidity sensor may be a capacitive humidity sensor, a resistive humidity sensor or a thermal humidity sensor, which is not limited thereto.
The motor controller comprises a detection module 11, wherein the detection module 11 is connected with the insulation resistance module 10, and can acquire the resistance value of the insulation resistance in the insulation resistance module 10, so that the resistance value of the insulation resistance is detected to judge whether the motor controller has insulation faults or not. The detection module 11 detects the resistance value of the insulation resistor, specifically, detects whether the resistance value of the insulation resistor is smaller than a resistance threshold.
Specifically, a resistance threshold value is preset in the detection module 11, and the resistance threshold value is used as a judging basis for judging whether an insulation fault occurs in the motor controller. If the resistance of the insulation resistor is smaller than the resistance threshold, the insulation condition of the insulation resistor is seriously deteriorated due to excessive decrease of the resistance of the insulation resistor, and the insulation fault of the motor controller is represented. If the resistance value of the insulation resistor is larger than or equal to the resistance threshold value, the state of the insulation resistor is judged to be good, the problem that the insulation condition of the insulation resistor is deteriorated does not exist, the insulation state of the motor controller is good, and the motor controller does not have insulation faults. It will be appreciated that the resistance threshold is a parameter that a worker tests in advance to reasonably characterize whether an insulation failure has occurred in the motor controller to which the worker applies, and thus the preset resistance threshold in the motor controller may be different for different motor controllers or different insulation resistances. Those skilled in the art reasonably design the resistance threshold according to the product requirements, and the value of the resistance threshold is not particularly limited in the embodiment of the invention.
It can be understood that the detection module 11 detects the resistance value of the insulation resistor in the insulation resistor module 10, and if the detection result is that it is determined that the insulation fault does not occur in the motor controller, the detection module 11 continues to detect the resistance value of the insulation resistor in the insulation resistor module 10 to monitor the insulation condition of the motor controller.
The detection module 11 is connected to a humidity sensor 12. When the motor controller works in a humid environment or a cold air environment, water vapor easily enters the motor controller to make the motor controller insulated and wet, so that the resistance value of the insulation resistor is reduced, and the factors causing the insulation failure of the motor controller include the humidity of the environment where the motor controller is located. Based on this, the detection module 11 detects the resistance value of the insulation resistor in the insulation resistor module 10, and if the detection result is that it is determined that the motor controller has an insulation fault, the detection module 11 will acquire the humidity information of the humidity sensor 12, so as to detect the humidity information to determine whether the insulation fault of the motor controller is related to the environmental humidity, so that the staff can take relevant repair measures for specific fault reasons. For example, the detection module judges that the insulation fault of the motor controller is related to the environmental humidity, and then a worker can dehumidify the environment where the motor controller is positioned to improve the insulation fault problem; etc., not limited thereto.
It should be noted that, the humidity sensor 12 may monitor the environmental humidity at the location and generate the humidity information as an electrical signal, and the detection module 11 obtains the electrical signal and analyzes the electrical signal to obtain the value of the environmental humidity. Alternatively, the humidity sensor 12 monitors the ambient humidity at the location and generates humidity information that may be an electrical signal carrying a humidity value, and the detection module 11 obtains the electrical signal and extracts the humidity value therefrom. The detection module 11 detects humidity information specifically to detect whether the humidity value is greater than a humidity threshold.
Specifically, the detection module 11 is preset with a humidity threshold, and the humidity threshold is used as a judging basis for judging whether the insulation fault of the motor controller is related to the environmental humidity. If it is detected that the humidity value provided by the humidity sensor 12 is greater than the humidity threshold, it is determined that the ambient humidity at the location of the humidity sensor 12 is too high and too humid, and the ambient humidity may cause an insulation fault, where the ambient humidity is characterized as a factor that causes an insulation fault of the motor controller. If the humidity value provided by the humidity sensor 12 is detected to be smaller than or equal to the humidity threshold, it is determined that the environmental humidity state of the position where the humidity sensor 12 is located is good, then the environmental humidity state cannot cause insulation failure, at this time, the humidity representing the current air environment cannot be a factor for causing insulation failure of the motor controller, and after the environmental humidity factor is discharged, other factors for causing insulation failure of the motor controller can be analyzed subsequently. It will be appreciated that the humidity threshold is a parameter pre-tested by a worker to reasonably characterize whether the insulation fault of the motor controller to which it is applied is related to ambient humidity, and thus the humidity threshold preset in the motor controller may be different for different motor controllers or different insulation resistances. The humidity threshold is designed reasonably according to the needs of the product by the person skilled in the art, and the numerical value of the humidity threshold is not limited in the embodiment of the invention.
Fig. 2 is a schematic diagram of another motor controller according to an embodiment of the present invention. As shown in fig. 2, the optional insulation resistance module 10 includes an insulation resistance 13 and a resistance tester 14, and the resistance tester 14 is connected with the insulation resistance 13 and the detection module 11, respectively; the detection module 11 is used for obtaining the resistance value of the insulation resistor 13 through the resistance tester 14 and detecting the resistance value of the insulation resistor 13.
In this embodiment, the resistance tester 14 is connected to the insulation resistor 13, and the resistance tester 14 is used for monitoring the resistance change of the insulation resistor 13 in real time or at regular time. The detection module 11 is connected to the resistance tester 14, so that the detection module 11 can obtain the resistance value of the insulation resistor 13 from the resistance tester 14 and perform subsequent detection. It will be appreciated that the insulation resistance module includes, but is not limited to, the above structure, and that the resistance tester may be independently provided and connected to the detection module by way of example; alternatively, in other embodiments, the optional resistance tester is integrated into a detection module, which may be directly connected to the insulation resistance to perform the function of monitoring the resistance change of the insulation resistance. The invention is not particularly limited to the structures of the detection module and the insulation resistance module, and only needs to be capable of realizing the collection and detection of the resistance value of the insulation resistance.
In other embodiments, the optional motor controller further comprises: the detection modules are respectively connected with the humidity sensors; the detection module is used for determining the humidity average value of the plurality of humidity sensors as humidity information of the humidity sensors. A plurality of humidity sensors are arranged at different positions in the motor controller, the humidity sensors can monitor the humidity at different positions, the detection module calculates a humidity average value according to the humidity values of the humidity sensors, the humidity average value is determined to be the humidity information of the humidity sensors, and the humidity detection accuracy can be improved.
It should be noted that the key structures and connection manners in the foregoing embodiments are only schematically shown in the foregoing drawings, and not all structures operated by the motor controller are included, nor are the structural connection manners of the motor controller limited, and all other or connection manners of the motor controller may be shown in the following description of the present invention.
In the embodiment of the invention, a humidity sensor is arranged in the motor controller, a detection module detects whether an insulation fault occurs in the insulation resistance module, and after the insulation fault is judged, the humidity information of the humidity sensor is detected to judge whether the insulation fault of the motor controller is related to the ambient humidity. In the invention, after the motor controller is in fault, whether the motor controller is in insulation fault is firstly analyzed, if the motor controller is in insulation fault, whether the motor controller is in insulation caused by ambient humidity is considered, so that the cause of the fault in the motor controller can be rapidly and accurately judged, and the maintenance cost of the motor controller is reduced.
Fig. 3 is a schematic diagram of still another motor controller according to an embodiment of the present invention. As shown in fig. 3, the alternative motor controller further includes: the temperature sensor 15, the detection module 11 is also connected with the temperature sensor 15; the detection module 11 comprises 1 st to nth temperature intervals and 1 st to nth resistance thresholds, the ith temperature interval corresponds to the ith resistance threshold, N is greater than 1, i is greater than or equal to 1 and is less than or equal to N; the detection module 11 is configured to detect whether the resistance value of the insulation resistor 13 is smaller than an i-th resistance threshold when detecting that the temperature value of the temperature sensor 15 is located in an i-th temperature interval.
In this embodiment, the motor controller includes a temperature sensor 15. The relevant practitioner can reasonably design the installation position of the temperature sensor in the shell of the motor controller according to the requirements of the product, and the installation position of the temperature sensor is not limited in the embodiment of the invention as long as the temperature data acquisition can be realized. The temperature sensor 15 is able to sense the temperature of the environment and convert it into a usable output signal. The type of the temperature sensor is not limited in the embodiment of the invention, for example, the temperature sensor can be a contact type temperature sensor or a non-contact type temperature sensor according to the measurement mode, and the temperature sensor can be a thermal resistance temperature sensor or a thermocouple temperature sensor according to the characteristics of sensor materials and electronic elements, and is not limited to the above.
The change of the ambient temperature of the resistor causes the resistance value of the resistor to change. Specifically, under the condition that other conditions are the same, the temperature of the environment is increased, and the resistance of the resistor is reduced; the temperature of the environment is reduced, and the resistance value of the resistor is increased. Therefore, under the condition that the insulation resistance is normal, when other conditions are the same and the environment temperature is high, the nominal resistance value of the insulation resistance may be reduced; the nominal resistance of the insulation resistance may increase at low ambient temperatures. Based on the above, when the environmental temperature changes, different resistance thresholds are set, so that the insulation fault can be judged more accurately.
The detection module 11 comprises 1 st to nth temperature intervals and 1 st to nth resistance thresholds, the ith temperature interval corresponds to the ith resistance threshold, N is greater than 1, and i is greater than or equal to 1 and less than or equal to N. In a laboratory environment, the motor controller is positioned in a 1 st temperature interval, whether the motor controller has an insulation fault is detected, the resistance value which causes the insulation fault of the motor controller is determined to be a 1 st resistance threshold corresponding to the 1 st temperature interval, and the resistance value which causes the insulation fault of the motor controller in an N th temperature interval is determined to be an N th resistance threshold corresponding to the N th temperature interval. The 1 st to the nth temperature intervals which are sequentially arranged can be a plurality of temperature intervals formed by dividing continuous temperatures which change from small to large, each temperature interval corresponds to a resistance threshold, and the resistance thresholds corresponding to different temperature intervals can be the same or different.
The detection module 11 is connected to a temperature sensor 15. The detection module 11 detects the resistance value of the insulation resistor in the insulation resistor module 10, and if the detection result is that the insulation fault of the motor controller is determined, the detection module 11 obtains the temperature information of the temperature sensor 15, so as to determine the current environmental temperature of the motor controller. It should be noted that, the temperature sensor 15 monitors the ambient temperature at the location and generates temperature information, which may be an electrical signal, and the detection module 11 obtains the electrical signal and analyzes the electrical signal to obtain the value of the ambient temperature. Alternatively, the temperature sensor 15 monitors the ambient temperature at the location and generates temperature information that may be an electrical signal carrying a temperature value, and the detection module 11 obtains the electrical signal and extracts the temperature value therefrom. The detection module 11 detects temperature information specifically means determining a temperature interval to which the temperature value acquired by the temperature sensor 15 belongs.
The detection module 11 detects whether the resistance value of the insulation resistor 13 is smaller than the i-th resistance threshold value when detecting that the temperature value of the temperature sensor 15 is located in the i-th temperature zone. When the ambient temperature of the current motor controller is in the ith temperature interval, the ith resistance threshold is used as a judging basis for judging whether insulation faults occur in the current motor controller. If the resistance of the insulation resistor 13 is smaller than the ith resistance threshold, the motor controller is judged to have insulation failure. If the resistance of the insulation resistor 13 is greater than or equal to the ith resistance threshold, it is determined that the insulation state of the motor controller is good, and no insulation failure occurs.
It can be understood that the 1 st to nth temperature ranges are environment temperature ranges possibly applied by the motor controller, and the 1 st to nth resistance thresholds are obtained by testing in different temperature ranges by a worker, so that the temperature ranges and the resistance thresholds are reasonably designed according to the needs of the product by the worker in the art, and the temperature ranges and the resistance thresholds are not particularly limited in the embodiment of the invention.
It will be appreciated that temperature and humidity sensors may be used to collect temperature and humidity information. The temperature and humidity sensor uses a probe as a temperature measuring element to collect temperature and humidity signals, and the temperature and humidity signals are converted into current signals or voltage signals which are in linear relation with the temperature and the humidity after being processed by circuits such as voltage stabilizing filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse protection and the like, and then the current signals or the voltage signals are output to a detection module.
Fig. 4 is a schematic diagram of still another motor controller according to an embodiment of the present invention. As shown in fig. 4, the alternative motor controller further includes: a drive plate 16; the detection module 11 is further connected to the driving board 16 for detecting status information of the driving board 16 after determining that an insulation failure occurs. The optional detection module 11 includes drive plate fault parameters and humidity thresholds; the detection module 11 is configured to detect whether the status information of the driving board 16 matches the driving board fault parameter and whether the humidity value of the humidity sensor 12 is greater than the humidity threshold after determining that the insulation fault occurs.
In this embodiment, the motor controller includes a driving board 16, and it is understood that various functional components such as a capacitor, a resistor, an inductor, a switching device, etc. are integrated on the driving board 16. In operation of the motor controller, the drive board 16 analyzes the processed signals and sends corresponding signals to an external load electrically connected to the motor controller. The structure and function of the drive plate will be understood by the skilled practitioner, and the structure of the drive plate in the motor controller is not particularly limited in the embodiments of the present invention.
The drive plate 16 includes associated components or structures therein that reflect the status of the drive plate. When the driving board 16 works normally, the driving board state assembly generates a signal representing the normal state of the driving board according to the working state of the driving board 16, or the driving board state structure does not output a signal when the driving board 16 works normally. When the drive plate 16 fails, the drive plate state assembly generates a signal indicative of the drive plate failure based on the abnormal state of the drive plate 16.
The detection module 11 is connected to the driving board 16, and can obtain status information of the driving board 16. Specifically, the detection module 11 detects the resistance value of the insulation resistor 13 in the insulation resistor module 10, and if the detection result is that it is determined that the motor controller has an insulation fault, the detection module 11 acquires the status information of the acquisition driving board 16 to determine whether the cause of the insulation fault is the driving board fault. If the state information of the driving board 16 obtained by the detection module 11 indicates that the driving board is normal, the detection module 11 detects other factors to determine the cause of the insulation fault. If the state information of the drive board 16 obtained by the detection module 11 indicates a fault of the drive board, the detection module 11 determines that an insulation fault of the motor controller is related to the fault of the drive board 16. The relevant staff can now solve the insulation failure of the motor controller by replacing the drive plate 16.
The detection module 11 includes drive board fault parameters and humidity thresholds. After determining that an insulation fault has occurred, the detection module 11 detects whether the status information of the drive board 16 matches the drive board fault parameters. After the detection module 11 obtains the status information of the driving board 16, the status information of the driving board is matched with the pre-stored fault parameters of the driving board, and if the status information of the driving board and the pre-stored fault parameters of the driving board are the same, the fault of the driving board is determined. Illustratively, the drive plate 16 normally operates with the drive plate status assembly generating a binary "0" and the drive plate 16 malfunctioning with the drive plate status assembly generating a binary "1". The drive board fault parameter in the detection module 11 is a binary "1". If the detection module 11 detects that the state information of the driving board 16 is "0", it can be determined that the state of the driving board 16 is normal; if the detection module 11 detects that the status information of the driving board 16 is "1", it may be determined that the driving board 16 is faulty, so as to determine that the fault of the driving board 16 may cause an insulation fault of the motor controller.
The detection module 11 also detects whether the humidity value of the humidity sensor 12 is greater than the humidity threshold after determining that an insulation failure has occurred. It will be appreciated that the detection module 11 may perform a drive board fault factor analysis and an environmental moisture factor analysis after determining that an insulation fault has occurred, and the analysis of the two insulation fault factors may be performed simultaneously or in a time-sharing manner.
For example, after determining that an insulation fault occurs, the detection module 11 may first acquire the status information of the driving board 16 and detect whether the status information matches the driving board fault parameters; if not, the drive plate 16 is normally characterized, and the humidity value acquired by the humidity sensor 12 can be acquired and detected to be greater than a humidity threshold. If the humidity value collected by the humidity sensor 12 is greater than the humidity threshold, an excessive humidity indicative of the environment may cause insulation failure of the motor controller. At this time, the staff can quickly judge the reason of the insulation fault and can directly dehumidify the motor controller so as to eliminate the insulation fault.
In other embodiments, after determining that an insulation fault occurs, the detection module may also first analyze environmental moisture factors; if the air environment humidity is good, analyzing fault factors of the driving plate; if it is determined that the drive plate is faulty, the operator can directly replace the drive plate to eliminate the insulation fault. In other embodiments, after determining that an insulation fault occurs, the detection module may also perform an environmental moisture factor analysis and a drive board fault factor analysis simultaneously, and perform a corresponding repair operation according to the factor analysis result.
Based on the same inventive concept, the embodiment of the invention also provides a detection method of the motor controller, wherein the motor controller is the motor controller in any embodiment. In this embodiment, the motor controller includes an insulation resistance module and a humidity sensor. Fig. 5 is a schematic diagram of a detection method of a motor controller according to an embodiment of the present invention, where the detection method may be performed by a detection module, and the detection module may be implemented in hardware and/or software, and the detection module is a detection module according to any of the foregoing embodiments, and the detection module is configured in the motor controller.
As shown in fig. 5, the detection method includes:
step 110, detecting whether an insulation fault occurs in the insulation resistance module;
and step 120, detecting humidity information of the humidity sensor if the insulation fault is judged to occur.
The optional motor controller further comprises a drive plate; the detection method further comprises the following steps:
and 130, if the insulation fault is judged to occur, detecting whether the state information of the driving plate is matched with the fault parameters of the driving plate, and detecting whether the humidity value of the humidity sensor is larger than a humidity threshold value.
In this embodiment, whether or not an insulation failure occurs in the motor controller is determined by detecting the resistance value of the insulation resistance. Specifically, if the resistance value of the insulation resistor is detected to be smaller than a preset resistance threshold value, judging that the motor controller has insulation fault; if the resistance value of the insulation resistor is detected to be larger than or equal to the preset resistance threshold value, the insulation condition of the motor controller is judged to be good, and no insulation fault occurs.
After the insulation fault of the motor controller is judged, the environmental humidity factor analysis can be carried out on the insulation fault of the motor controller. And judging whether the insulation fault of the motor controller is related to the environmental humidity or not by detecting the humidity information output by the humidity sensor. Specifically, if the humidity value acquired by the humidity sensor is detected to be greater than the preset humidity threshold, the fact that the humidity inside the motor controller is too high is indicated, and the insulation fault of the motor controller is related to the ambient humidity. If the humidity value acquired by the humidity sensor is detected to be smaller than the preset humidity threshold value, the condition that the humidity state in the motor controller is good is indicated, and the insulation fault is irrelevant to the environment humidity.
After the insulation fault of the motor controller is judged, the fault factor analysis of the driving plate can be carried out on the insulation fault of the motor controller. Whether the insulation fault of the motor controller is related to the fault of the driving plate is judged by detecting whether the driving plate is faulty or not. Specifically, if the state information of the driving plate is detected to be the same as the preset driving plate fault parameter, the driving plate fault is indicated, and the insulation fault of the motor controller is related to the driving plate fault. If the state information of the driving plate is detected to be different from the preset driving plate fault parameters, the driving plate is normal, and the insulation fault of the motor controller is irrelevant to the driving plate.
Fig. 6 is a schematic diagram of another detection method of a motor controller according to an embodiment of the present invention. Unlike fig. 5. The detection method shown in fig. 6 acquires the driving plate state information and the environmental humidity information, and then performs insulation fault detection and insulation fault reason judgment, so that specific insulation fault reason is locked by judging the driving plate fault information and the humidity sensor information.
As shown in fig. 6, the detection method includes:
step 201, starting;
step 202, obtaining driving plate state information;
step 203, acquiring information of a humidity sensor, namely an environmental humidity value acquired by the humidity sensor;
step 204, judging whether the motor controller has insulation fault; if yes, jump to step 205; if not, go to step 210;
step 205, judging the status information of the driving plate, and detecting whether the driving plate has a fault or not; if yes, jump to step 208; if not, jump to step 206;
step 206, judging whether the humidity is too high; if yes, jump to step 209; if not, go to step 207;
step 207, determining that another fault cause causes an insulation fault, outputting another fault cause, and jumping to step 210;
step 208, judging that the driving plate fails, outputting the driving plate failure, and jumping to step 210;
step 209, determining that the humidity is too high, outputting the humidity to be abnormal, and jumping to step 210;
step 210, the motor controller judges whether the cycle is ended according to the failure cause judgment result;
if the loop is not performed, the detection flow ends in step 211.
If the cycle is continued, the above determination is repeated, and false alarm due to interference or the like is prevented.
In this embodiment, by adding fault type judgment of the insulation fault, two common insulation fault causes can be locked, and the insulation fault causes can be rapidly judged for the fault or the abnormal humidity fault of the driving board, so that the steps of fault analysis are reduced, and the analysis efficiency is improved.
Based on the same inventive concept, an embodiment of the present invention also provides a vehicle including: a whole vehicle controller, a motor and a motor controller as described in any of the above embodiments; the whole vehicle controller is connected with the motor through the motor controller. The optional vehicle is an electric vehicle or a hybrid electric vehicle.
And the whole vehicle controller generates a corresponding driving signal according to the request of the driver and sends the driving signal to the motor controller. The motor controller is connected with the motor, and the motor controller MCU controls the motor to work according to the direction, the speed, the angle and the response time corresponding to the driving signal through active work.
The structure of the vehicle is not specifically described in the present invention. It is understood that the motor controller includes, but is not limited to, application in a vehicle.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A motor controller, comprising: the device comprises an insulation resistance module, a detection module and a humidity sensor;
the detection module is connected with the insulation resistance module and is used for detecting whether insulation faults occur in the insulation resistance module or not;
the detection module is also connected with the humidity sensor and is used for detecting humidity information of the humidity sensor after judging that an insulation fault occurs.
2. The motor controller of claim 1, wherein the insulation resistance module comprises an insulation resistance and a resistance tester, the resistance tester being connected to the insulation resistance and the detection module, respectively;
the detection module is used for obtaining the resistance value of the insulation resistor through the resistance tester and detecting the resistance value of the insulation resistor.
3. The motor controller according to claim 2, further comprising: the detection module is also connected with the temperature sensor;
the detection module comprises a 1 st to an N temperature interval and a 1 st to an N resistance threshold, wherein the i temperature interval corresponds to the i resistance threshold, N is more than 1, i is more than or equal to 1 and less than or equal to N;
the detection module is used for detecting whether the resistance value of the insulation resistor is smaller than the ith resistance threshold value when the temperature value of the temperature sensor is detected to be located in the ith temperature interval.
4. The motor controller of claim 1, further comprising: a driving plate;
the detection module is also connected with the driving plate and is used for detecting the state information of the driving plate after the insulation fault is judged.
5. The motor controller of claim 4 wherein the detection module includes a drive plate fault parameter and a humidity threshold;
the detection module is used for detecting whether the state information of the driving plate is matched with the fault parameters of the driving plate or not and detecting whether the humidity value of the humidity sensor is larger than the humidity threshold value or not after the insulation fault is judged.
6. The motor controller according to claim 1, comprising: the detection modules are respectively connected with the humidity sensors;
the detection module is used for determining the humidity average value of the humidity sensors as the humidity information of the humidity sensors.
7. A method of detecting a motor controller, the motor controller comprising an insulation resistance module and a humidity sensor, the method comprising:
detecting whether the insulation resistance module has insulation faults or not;
and if the insulation fault is judged to occur, detecting humidity information of the humidity sensor.
8. The method of detecting according to claim 7, wherein the motor controller further comprises a drive board;
further comprises:
if the insulation fault is judged to occur, detecting whether the state information of the driving plate is matched with the fault parameters of the driving plate or not, and detecting whether the humidity value of the humidity sensor is larger than a humidity threshold value or not.
9. A vehicle, characterized by comprising: a vehicle control, a motor and a motor control as claimed in any one of claims 1 to 6;
and the whole vehicle controller is connected with the motor through the motor controller.
10. The vehicle according to claim 9, characterized in that the vehicle is an electric vehicle or a hybrid vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310799127.3A CN116852996A (en) | 2023-06-30 | 2023-06-30 | Motor controller, detection method and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347807A (en) * | 2023-12-04 | 2024-01-05 | 山东航天正和电子有限公司 | Insulation and voltage-withstand comprehensive test device for electric connector |
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- 2023-06-30 CN CN202310799127.3A patent/CN116852996A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347807A (en) * | 2023-12-04 | 2024-01-05 | 山东航天正和电子有限公司 | Insulation and voltage-withstand comprehensive test device for electric connector |
| CN117347807B (en) * | 2023-12-04 | 2024-03-26 | 山东航天正和电子有限公司 | Insulation and voltage-withstand comprehensive test device for electric connector |
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