CN112477623B - Motor rotating speed optimization method and system - Google Patents

Motor rotating speed optimization method and system Download PDF

Info

Publication number
CN112477623B
CN112477623B CN202011315055.3A CN202011315055A CN112477623B CN 112477623 B CN112477623 B CN 112477623B CN 202011315055 A CN202011315055 A CN 202011315055A CN 112477623 B CN112477623 B CN 112477623B
Authority
CN
China
Prior art keywords
value
rotating speed
motor rotating
current motor
reset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011315055.3A
Other languages
Chinese (zh)
Other versions
CN112477623A (en
Inventor
林玉敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangling Motors Corp Ltd
Original Assignee
Jiangling Motors Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangling Motors Corp Ltd filed Critical Jiangling Motors Corp Ltd
Priority to CN202011315055.3A priority Critical patent/CN112477623B/en
Publication of CN112477623A publication Critical patent/CN112477623A/en
Application granted granted Critical
Publication of CN112477623B publication Critical patent/CN112477623B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • 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

Abstract

The invention provides a motor rotating speed optimization method and a motor rotating speed optimization system. The first acquisition module is used for acquiring a current motor rotating speed input value and a motor rotating speed output value in the previous period. The second acquisition module is used for acquiring a reset value corresponding to the current motor rotating speed input value. The comparison module is used for comparing the difference value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value, and comparing the sum value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value. The output module is used for determining the current motor rotating speed value. According to the motor rotating speed optimization method and the motor rotating speed optimization system, the motor rotating speed output value can be more stable, the fluctuation range is reduced, and the jitter of the motor rotating speed output value is reduced.

Description

Motor rotating speed optimization method and system
Technical Field
The invention relates to the technical field of automobile power transmission, in particular to a motor rotating speed optimization method and system.
Background
At present, electric vehicles are very popular, and consumers feel more severe about driving of the electric vehicles. The motor speed of the electric vehicle is a linear variation process, and in the variation process of the motor speed, a real-time value of the motor speed may generate a certain fluctuation, which is generally called as a jitter of the motor speed.
The motor rotating speed of the electric automobile is easy to cause the jitter of the motor rotating speed due to the clearance of a transmission system, the characteristics of the motor and certain use conditions, but the motor rotating speed is an important input for a VCU (vehicle control unit), for example, the motor rotating speed is required to calculate the automobile speed, the motor rotating speed is used to calculate the external torque characteristic of the motor, the motor rotating speed is used to calculate the actual power of the motor, and the like, so as to prevent the jump of the automobile speed, the external torque characteristic, the power and the like caused by the jitter of the motor rotating speed from influencing the driving performance of the whole automobile. Therefore, the rotating speed of the motor needs to be optimized, and the driving performance of the whole vehicle is improved.
However, in the existing vehicle control unit, there is no processing method for optimizing the motor rotation speed, so that the motor rotation speed output value of the vehicle control unit is jittered, and the drivability of the vehicle is affected.
Disclosure of Invention
Based on this, a first object of the present invention is to provide a motor speed optimization method capable of reducing motor speed jitter.
A second object of the present invention is to provide a motor speed optimization system capable of reducing motor speed jitter.
In order to achieve the first object of the present invention, the method for optimizing the rotating speed of the motor provided by the present invention comprises the following steps:
acquiring a current motor rotating speed input value and a motor rotating speed output value in the previous period;
acquiring a reset value corresponding to a current motor rotating speed input value;
comparing the difference value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value, and comparing the sum value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value;
and determining the current motor rotating speed output value according to the comparison result of the current motor rotating speed input value and the difference value and the comparison result of the current motor rotating speed input value and the sum value of the motor rotating speed output value and the reset value in the previous period.
In the scheme, the current motor rotating speed output value is optimized according to the comparison result of the current motor rotating speed input value and the difference value and the comparison result of the current motor rotating speed input value and the sum value of the motor rotating speed output value and the reset value in the previous period, so that the motor rotating speed output value is more stable, the fluctuation range is reduced, and the jitter of the motor rotating speed output value is reduced.
Preferably, the obtaining of the reset value specifically includes the following steps:
dividing the rotating speed of the motor into a first interval, a second interval and a third interval, wherein the rotating speed value of the second interval is greater than that of the first interval, the rotating speed value of the third interval is greater than that of the second interval, and each interval corresponds to different reset values;
and determining the interval of the current motor rotating speed input value according to the acquired current motor rotating speed input value, wherein the reset value corresponding to the interval is the reset value corresponding to the current motor rotating speed input value.
In the above scheme, the motor rotation speed is divided into three sections, namely a low-speed section, a medium-speed section and a high-speed section, according to the rotation speed and the characteristics of the motor, the first section is the low-speed section, the second section is the medium-speed section, the third section is the high-speed section, and the return values corresponding to the sections are different. The reset value corresponding to the low-speed interval is the largest, the reset value corresponding to the medium-speed interval is the second, and the reset value corresponding to the high-speed interval is smaller. When the rotating speed of the motor is in a low-speed range, the dithering amplitude of the rotating speed of the motor is large, so that a large reset value is needed to counteract the dithering amplitude of the rotating speed of the motor. When the rotating speed of the motor is higher, the shaking amplitude of the rotating speed of the motor is small, and the reset value can be properly reduced.
The further scheme is that the step of determining the current motor rotating speed output value specifically comprises the following steps:
and if the current motor rotating speed input value is smaller than or equal to the difference value, determining that the current motor rotating speed output value is the sum of the current motor rotating speed input value and the reset value.
In the above scheme, when the current motor rotation speed input value is too small, the current motor rotation speed input value is added with the reset value, and the current motor rotation speed input value and the reset value are added to form the motor rotation speed output value, so that when the current motor rotation speed input value is smaller than the motor rotation speed output value in the previous period and the difference between the current motor rotation speed input value and the motor rotation speed output value in the previous period is larger, the difference between the motor rotation speed output value and the motor rotation speed output value in the previous period can be made up.
Further, the step of determining the current motor speed output value specifically includes:
and if the current motor rotating speed input value is greater than the difference value and the current motor rotating speed input value is less than or equal to the sum of the motor rotating speed output value in the previous period and the reset value, determining that the current motor rotating speed output value is the motor rotating speed output value in the previous period.
In the above scheme, when the difference between the current motor rotation speed input value and the previous period motor rotation speed output value is smaller than the reset value, the current motor rotation speed output value is the previous period motor rotation speed output value, so that the current motor rotation speed output value is equal to the previous period motor rotation speed output value, and the motor rotation speed jitter is substantially offset.
Further, the step of determining the current motor speed output value specifically includes:
and if the current motor rotating speed input value is greater than the sum of the motor rotating speed output value and the reset value in the previous period, determining that the current motor rotating speed output value is the difference between the current motor rotating speed input value and the reset value.
In the above scheme, when the current motor speed input value is too large, the reset value is subtracted from the current motor speed input value, and the obtained difference is the motor speed output value, so that when the current motor speed input value is larger than the motor speed output value in the previous period and the difference between the current motor speed input value and the motor speed output value in the previous period is larger, the difference between the current motor speed output value and the motor speed output value in the previous period can be made up, and the motor speed jitter is reduced.
In order to achieve the second object of the present invention, the present invention provides a motor rotation speed optimizing system comprising:
the first acquisition module is used for acquiring a current motor rotating speed input value and a motor rotating speed output value in the previous period;
the second acquisition module is used for acquiring a reset value corresponding to the current motor rotating speed input value;
the comparison module is used for comparing the difference value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value and comparing the sum value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value;
and the output module is used for determining the current motor rotating speed output value according to the comparison result of the difference value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value and the comparison result of the sum value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value.
In the above scheme, the motor speed optimization system may determine the current motor speed output value according to the current motor speed input value, the previous period motor speed output value and the reset value, and reduce a difference between the current motor speed output value and the previous period motor speed output value, thereby reducing motor speed jitter.
Preferably, the second obtaining module is configured to divide the rotation speed of the motor into a first interval, a second interval, and a third interval, where the rotation speed value of the second interval is greater than the rotation speed value of the first interval, the rotation speed value of the third interval is greater than the rotation speed value of the second interval, and each interval corresponds to a different reset value;
the second acquisition module is used for determining the interval of the current motor rotating speed input value and then determining the reset value corresponding to the current motor rotating speed input value according to the interval of the current motor rotating speed input value.
The output module is used for determining that the current motor rotating speed output value is the sum of the current motor rotating speed input value and the reset value when the comparison module determines that the current motor rotating speed input value is smaller than or equal to the difference value between the motor rotating speed output value and the reset value in the previous period.
In a further aspect, when the comparing module determines that the current motor speed input value is greater than the difference between the previous cycle motor speed output value and the reset value, and the current motor speed input value is less than or equal to the sum of the previous cycle motor speed output value and the reset value, the output module is configured to determine that the current motor speed output value is the previous cycle motor speed output value.
In the scheme, the motor rotating speed optimizing system can counteract the shaking of the rotating speed of the power down motor under the condition that the difference value between the current motor rotating speed input value and the motor rotating speed output value in the previous period is not large.
In a further aspect, when the comparing module determines that the current motor speed input value is greater than the sum of the motor speed output value and the reset value in the previous cycle, the output module is configured to determine that the current motor speed output value is the difference between the current motor speed input value and the reset value.
Drawings
Fig. 1 is a flowchart of a method for optimizing a rotational speed of a motor according to an embodiment of the present invention.
Fig. 2 is a detailed flowchart of step S2 in fig. 1.
Fig. 3 is a detailed flowchart of step S4 in fig. 1.
Fig. 4 is a functional block diagram of a motor rotation speed optimization system according to an embodiment of the present invention.
Detailed Description
In order to facilitate a better understanding of the invention, the invention will be further explained below with reference to the accompanying drawings of embodiments. Embodiments of the present invention are shown in the drawings, but the present invention is not limited to the preferred embodiments described above. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The embodiment of the optimization method comprises the following steps:
referring to fig. 1, the method for optimizing the rotation speed of the motor provided in this embodiment includes the following steps: first, step S1 is executed to obtain the current motor speed input value and the last cycle motor speed output value. Next, step S2 is executed to obtain a reset value corresponding to the current input value of the motor speed. Then, step S3 is executed to compare the current motor speed input value and the difference between the previous cycle motor speed output value and the reset value, and compare the current motor speed input value and the sum of the previous cycle motor speed output value and the reset value. Finally, step S4 is executed to determine the current motor speed output value according to the comparison result between the current motor speed input value and the difference value and the comparison result between the current motor speed input value and the sum of the previous cycle motor speed output value and the reset value.
Referring to fig. 2, the step of acquiring the reset value specifically includes: first, step S21 is executed to divide the motor rotation speed into a first interval, a second interval and a third interval, wherein the rotation speed value of the second interval is greater than the rotation speed value of the first interval, the rotation speed value of the third interval is greater than the rotation speed value of the second interval, and each interval corresponds to a different reset value. Then, step S22 is executed to determine a section where the current motor speed input value is located according to the obtained current motor speed input value, where a reset value corresponding to the section is a reset value corresponding to the current motor speed input value.
In this embodiment, the motor rotation speed is divided into three sections, i.e., a low speed section, a medium speed section, and a high speed section, according to the size and characteristics of the motor rotation speed, where the first section is the low speed section, the second section is the medium speed section, the third section is the high speed section, and the setback value corresponding to each section is different. The reset value corresponding to the low-speed interval is the largest, the reset value corresponding to the medium-speed interval is the second, and the reset value corresponding to the high-speed interval is smaller. When the rotating speed of the motor is in a low-speed range, the dithering amplitude of the rotating speed of the motor is large, so that a large reset value is needed to counteract the dithering amplitude of the rotating speed of the motor. When the rotating speed of the motor is higher, the shaking amplitude of the rotating speed of the motor is small, and the reset value can be properly reduced. For example, 0r/min to 3300r/min is set as the low speed region, and the reset value is set as 300 r/min; setting 3300 r/min-6300 r/min as a medium-speed interval, and setting a reset value as 200 r/min; setting 6300 r/min-12000 r/min as a high-speed interval, and setting the reset value as 100 r/min. Based on the characteristics of the motor, the rotating speed of the motor generally cannot exceed 12000r/min, and if the rotating speed of the motor exceeds 12000r/min, the rotating speed of the motor is also calculated as 12000 r/min. Of course, the above-mentioned set interval value is only a preferable scheme, and a skilled person may determine the respective rotation speed ranges of the low speed interval, the medium speed interval and the high speed interval and the sizes of the reset values corresponding to the intervals according to the actual working conditions of the motor.
Referring to fig. 3, step S4 in fig. 1 specifically includes the following steps: firstly, executing step S41, determining whether the current motor rotation speed input value is less than or equal to the difference between the motor rotation speed output value and the reset value in the previous period; if yes, executing step S42, determining that the current motor rotating speed output value is the sum of the current motor rotating speed input value and the reset value, if not, executing step S43, and judging whether the current motor rotating speed input value is less than or equal to the sum of the motor rotating speed output value and the reset value in the previous period; if yes, step S44 is executed to determine that the current motor speed output value is the motor speed output value of the previous cycle. If not, step S45 is executed to determine that the current motor speed output value is the difference between the current motor speed input value and the reset value.
Example 1
In the present embodiment, the period is 10 ms. If the motor rotating speed output value of the previous period is 2200r/min, if the current motor rotating speed input value is 1850r/min, the motor rotating speed output value of the previous period corresponds to a low-speed interval, the corresponding reset value is 300r/min, and the motor rotating speed input value is smaller than the difference between the motor rotating speed output value and the reset value of the previous period, so that the current motor rotating speed output value is determined to be the sum of the current motor rotating speed input value and the reset value, namely 2150 r/min. If the current motor rotating speed input value is 2000r/min, the current motor rotating speed input value is smaller than the sum of the motor rotating speed output value in the previous period and the reset value, and the current motor rotating speed output value is determined to be the motor rotating speed output value in the previous period, namely 2200 r/min. If the current motor rotating speed input value is 2400r/min, the current motor rotating speed input value is still smaller than the sum of the motor rotating speed output value in the previous period and the reset value at the moment, and the current motor rotating speed output value is determined to be the motor rotating speed output value in the previous period, namely 2200 r/min. And if the current motor rotating speed input value is 2550r/min, determining that the current motor rotating speed input value is greater than the sum of the motor rotating speed output value and the reset value in the previous period, and determining that the current motor rotating speed output value is the difference between the current motor rotating speed input value and the reset value, namely 2250 r/min. Before the rotation speed optimization is not carried out, the current motor rotation speed output values are 2200r/min, 1850r/min, 2000r/min, 2400r/min and 2550r/min respectively. After the rotating speed optimization is carried out, the current rotating speed output values of the motor are 2200r/min, 2150r/min, 2200r/min and 2250r/min respectively. It can be seen that the amplitude of the fluctuation of the motor rotation speed is significantly reduced. By the motor rotating speed optimizing method, the jitter of the rotating speed value of the motor is greatly reduced.
Example 2
In the present embodiment, the period is 10 ms. If the motor rotating speed output value of the previous period is 4000r/min, if the current motor rotating speed input value is 3750r/min, the motor rotating speed output value of the previous period corresponds to a medium-speed interval, the corresponding reset value is 200r/min, the motor rotating speed input value is smaller than the difference between the motor rotating speed output value and the reset value of the previous period, and the current motor rotating speed output value is determined to be the sum of the current motor rotating speed input value and the reset value, namely 3950 r/min. And if the current motor rotating speed input value is 3900r/min, determining that the current motor rotating speed input value is smaller than the sum of the motor rotating speed output value in the previous period and the reset value, and determining that the current motor rotating speed output value is the motor rotating speed value in the previous period, namely 4000 r/min. If the current motor rotating speed input value is 4150r/min, the current motor rotating speed input value is still smaller than the sum of the motor rotating speed output value in the previous period and the reset value, and the current motor rotating speed output value is determined to be the motor rotating speed value in the previous period, namely 4000 r/min. If the current motor rotating speed input value is 4300r/min, the current motor rotating speed input value is larger than the sum of the motor rotating speed output value and the reset value in the previous period, and the current motor rotating speed output value is determined to be the difference between the current motor rotating speed input value and the reset value, namely 4100 r/min. Before the rotation speed optimization is not carried out, the current motor rotation speed output values are 4000r/min, 3750r/min, 3900r/min, 4150r/min and 4300r/min respectively. After the rotating speed optimization is carried out, the current rotating speed output values of the motor are 4000r/min, 3950r/min, 4000r/min and 4100r/min respectively. It can be seen that the amplitude of the fluctuation of the motor rotation speed is significantly reduced. By the motor rotating speed optimizing method, the jitter of the rotating speed value of the motor is greatly reduced.
Example 3
In the present embodiment, the period is 10 ms. If the motor rotating speed output value of the previous period is 8000r/min, and if the current motor rotating speed input value is 7800r/min, the motor rotating speed output value of the previous period corresponds to a medium-speed interval, the corresponding reset value is 100r/min, and the motor rotating speed input value is smaller than the difference between the motor rotating speed output value and the reset value of the previous period, the current motor rotating speed output value is determined to be the sum of the current motor rotating speed input value and the reset value, namely 7900 r/min. And if the current motor rotating speed input value is 7950r/min, determining that the current motor rotating speed input value is smaller than the motor rotating speed output value in the previous period and smaller than the sum of the motor rotating speed output value in the previous period and the reset value, and determining that the current motor rotating speed output value is the motor rotating speed value in the previous period, namely 4000 r/min. If the current motor rotating speed input value is 8050r/min, the current motor rotating speed input value is still smaller than the sum of the motor rotating speed output value in the previous period and the reset value but larger than the motor rotating speed value in the previous period, and the current motor rotating speed output value is determined to be the motor rotating speed value in the previous period, namely 8000 r/min. And if the current motor rotating speed input value is 8150r/min, determining that the current motor rotating speed input value is greater than the sum of the motor rotating speed output value and the reset value in the previous period, and determining that the current motor rotating speed output value is the difference between the current motor rotating speed input value and the reset value, namely 8050 r/min. Before the rotation speed optimization is not carried out, the current motor rotation speed output values are 8000r/min, 7800r/min, 7950r/min, 8050r/min and 8150r/min respectively. After the rotating speed optimization is carried out, the current rotating speed output values of the motor are 8000r/min, 7900r/min, 8000r/min and 8050r/min respectively. It can be seen that the amplitude of the fluctuation of the motor rotation speed is significantly reduced. By the motor rotating speed optimizing method, the jitter of the rotating speed value of the motor is greatly reduced.
In the embodiment, the motor rotation speed is divided into three intervals, and the reset values are 100r/min, 200r/min and 300r/min respectively, which is only a preferred embodiment. The motor rotating speed is not necessarily divided into three sections, and the number of the divided sections can be increased properly according to actual needs. For example, the rotation speed of the motor may be divided into five intervals, which are a first interval, a second interval, a third interval, a fourth interval and a fifth interval, the reset value corresponding to each interval sequentially increases, the reset value is not necessarily set to 100r/min, 200r/min, 300r/min, 400r/min …, and the size of the reset value may be determined according to the actual working condition of the motor.
The embodiment of the optimization system comprises:
referring to fig. 4, the system for optimizing the rotational speed of the motor provided in this embodiment includes a first obtaining module 1, a second obtaining module 2, a comparing module 3, and an output module 4. The first obtaining module 1 is used for obtaining a current motor rotating speed input value and a last period motor rotating speed output value. The second obtaining module 2 is used for obtaining a reset value corresponding to the current motor rotating speed input value. The comparison module 3 is used for comparing the difference value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value, and comparing the sum value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value. The output module 4 is used for determining the current motor rotating speed output value according to the comparison result of the difference value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value and the comparison result of the sum value between the current motor rotating speed input value and the last period motor rotating speed output value and the reset value.
In this embodiment, the second obtaining module 2 is configured to divide the rotation speed of the motor into a first interval, a second interval, and a third interval, where the rotation speed value of the second interval is greater than the rotation speed value of the first interval, the rotation speed value of the third interval is greater than the rotation speed value of the second interval, and each interval corresponds to a different reset value. The second obtaining module 2 is configured to determine an interval in which the current motor speed input value is located, and then determine a reset value corresponding to the current motor speed input value according to the interval in which the current motor speed input value is located.
In this embodiment, when the comparing module 3 determines that the current motor speed input value is less than or equal to the difference between the motor speed output value and the reset value in the previous period, the output module 4 is configured to determine that the current motor speed output value is the sum of the current motor speed input value and the reset value.
In this embodiment, when the comparing module 3 determines that the current motor speed input value is greater than the difference between the motor speed output value in the previous period and the reset value, and the current motor speed input value is less than or equal to the sum of the motor speed output value in the previous period and the reset value, the output module 4 is configured to determine that the current motor speed output value is the motor speed output value in the previous period.
In this embodiment, when the comparing module 3 determines that the current motor speed input value is greater than the sum of the motor speed output value and the reset value in the previous period, the output module 4 is configured to determine that the current motor speed output value is the difference between the current motor speed input value and the reset value.
In this embodiment, the motor speed optimization system optimizes the current motor speed output value according to the comparison result between the current motor speed input value and the difference between the previous cycle motor speed output value and the reset value and the comparison result between the current motor speed input value and the sum between the previous cycle motor speed output value and the reset value, so that the motor speed output value is more stable, the fluctuation range is reduced, and the jitter of the motor speed output value is reduced.
The above-described embodiments describe the technical principles of the present invention, and these descriptions are only for the purpose of explaining the principles of the present invention and are not to be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (8)

1. A motor rotating speed optimization method is characterized by comprising the following steps:
acquiring a current motor rotating speed input value and a motor rotating speed output value in the previous period;
acquiring a reset value corresponding to the current motor rotating speed input value;
comparing the difference between the current motor rotating speed input value and the last period motor rotating speed output value with the reset value, and comparing the sum of the current motor rotating speed input value and the last period motor rotating speed output value with the reset value;
determining a current motor rotating speed output value according to a comparison result of the current motor rotating speed input value and the difference value and a comparison result of a sum value of the motor rotating speed output value in the previous period and the reset value;
the step of obtaining the reset value specifically comprises the following steps:
dividing the rotating speed of the motor into a first interval, a second interval and a third interval, wherein the rotating speed value of the second interval is greater than that of the first interval, the rotating speed value of the third interval is greater than that of the second interval, and each interval corresponds to different reset values;
and determining the interval of the current motor rotating speed input value according to the acquired current motor rotating speed input value, wherein the reset value corresponding to the interval is the reset value corresponding to the current motor rotating speed input value.
2. The method of claim 1, wherein the step of determining the current motor speed output value specifically comprises:
and if the current motor rotating speed input value is less than or equal to the difference value between the motor rotating speed output value in the previous period and the reset value, determining that the current motor rotating speed output value is the sum of the current motor rotating speed input value and the reset value.
3. The method of claim 1, wherein the step of determining the current motor speed output value specifically comprises:
and if the current motor rotating speed input value is greater than the difference value between the last period motor rotating speed output value and the reset value, and the current motor rotating speed input value is less than or equal to the sum value of the last period motor rotating speed output value and the reset value, determining that the current motor rotating speed output value is the last period motor rotating speed output value.
4. The method of claim 1, wherein the step of determining the current motor speed output value specifically comprises:
and if the current motor rotating speed input value is greater than the sum of the motor rotating speed output value in the previous period and the reset value, determining that the current motor rotating speed output value is the difference between the current motor rotating speed input value and the reset value.
5. A motor speed optimization system, the optimization system comprising:
the first acquisition module is used for acquiring a current motor rotating speed input value and a motor rotating speed output value in the previous period;
the second acquisition module is used for acquiring a reset value corresponding to the current motor rotating speed input value;
the comparison module is used for comparing the difference values of the current motor rotating speed input value and the last period motor rotating speed output value with the reset value and comparing the sum values of the current motor rotating speed input value and the last period motor rotating speed output value with the reset value;
the output module is used for determining a current motor rotating speed output value according to a comparison result of the current motor rotating speed input value and the difference value and a comparison result of the current motor rotating speed input value and a sum of the previous period motor rotating speed output value and the reset value;
the second acquisition module is used for dividing the rotating speed of the motor into a first interval, a second interval and a third interval, wherein the rotating speed value of the second interval is greater than that of the first interval, the rotating speed value of the third interval is greater than that of the second interval, and each interval corresponds to different reset values;
the second acquisition module is used for determining the interval of the current motor rotating speed input value and then determining the reset value corresponding to the current motor rotating speed input value according to the interval of the current motor rotating speed input value.
6. The motor speed optimization system of claim 5, wherein:
and when the comparison module determines that the current motor rotating speed input value is smaller than or equal to the difference value between the motor rotating speed output value in the previous period and the reset value, the output module is used for determining that the current motor rotating speed output value is the sum of the current motor rotating speed input value and the reset value.
7. The motor speed optimization system of claim 5, wherein:
when the comparison module determines that the current motor rotating speed input value is greater than the difference value between the last period motor rotating speed output value and the reset value and the current motor rotating speed input value is less than or equal to the sum value between the last period motor rotating speed output value and the reset value, the output module is used for determining that the current motor rotating speed output value is the last period motor rotating speed output value.
8. The motor speed optimization system of claim 5, wherein:
and when the comparison module determines that the current motor rotating speed input value is greater than the sum of the motor rotating speed output value in the previous period and the reset value, the output module is used for determining that the current motor rotating speed output value is the difference between the current motor rotating speed input value and the reset value.
CN202011315055.3A 2020-11-20 2020-11-20 Motor rotating speed optimization method and system Active CN112477623B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011315055.3A CN112477623B (en) 2020-11-20 2020-11-20 Motor rotating speed optimization method and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011315055.3A CN112477623B (en) 2020-11-20 2020-11-20 Motor rotating speed optimization method and system

Publications (2)

Publication Number Publication Date
CN112477623A CN112477623A (en) 2021-03-12
CN112477623B true CN112477623B (en) 2022-03-15

Family

ID=74933107

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011315055.3A Active CN112477623B (en) 2020-11-20 2020-11-20 Motor rotating speed optimization method and system

Country Status (1)

Country Link
CN (1) CN112477623B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100608656B1 (en) * 2003-09-20 2006-08-04 엘지전자 주식회사 Velocity control apparatus for motor
CN105305893B (en) * 2015-10-14 2019-01-18 重庆长安汽车股份有限公司 Electric car, the suppressing method of the permanent magnet synchronous motor fluctuation of speed and inhibition system
CN105450098B (en) * 2015-12-11 2018-04-10 安徽美芝精密制造有限公司 Velocity perturbation suppressing method, control device and compressor control system
CN108016319A (en) * 2016-10-31 2018-05-11 大陆汽车投资（上海）有限公司 Apparatus and method for the torque for managing the motor in electric vehicle
CN106696756B (en) * 2016-12-20 2019-05-17 中冶南方（武汉）自动化有限公司 The method for controlling torque of revolving speed step
CN110171297A (en) * 2019-05-05 2019-08-27 北京新能源汽车股份有限公司 Driving motor output torque control method, system and the vehicle of electric car

Also Published As

Publication number Publication date
CN112477623A (en) 2021-03-12

Similar Documents

Publication Publication Date Title
EP2610528B1 (en) Electric pump system
CN110356248B (en) Motor torque control method and device, storage medium and vehicle
CN104029675A (en) Hybrid power vehicle and power system torque control method thereof
CN108715139B (en) Torque control method, device and equipment for electric automobile
CN112622866B (en) Engine rotating speed adjusting method and device, vehicle electric control device and medium
US8058834B2 (en) Control device for automatic transmission
CN111976500A (en) Torque filtering method, torque filtering device and vehicle
CN112477623B (en) Motor rotating speed optimization method and system
CN108082006B (en) Motor controller working state control method and device, controller and electric automobile
CN109252970B (en) Engine rotating speed control method, engine and vehicle
US11479126B2 (en) System and method for compensating acceleration of electrical motorbike
CN110803032A (en) Motor control method and device, motor controller, storage medium and system
CN114228697B (en) Engine stop control method and device, hybrid vehicle and medium
CN111089166B (en) Self-learning method and device for hydraulic torque converter, electronic equipment and storage medium
CN114909280A (en) Hydraulic pump control method and system based on multi-source information feedback optimization
CN113733931A (en) Method and device for controlling torque request of accelerator pedal of pure electric vehicle
CN110131057B (en) Torque control method and system
CN111293927A (en) Multi-motor synchronous drive control method, device and system
US9577559B2 (en) Apparatus and method for controlling power generation of vehicle
CN111042935A (en) Intelligent power generation control system and method in vehicle running process
CN117246148A (en) Control method, control device, electronic apparatus, and storage medium for electric drive system
JP7003844B2 (en) Battery system
CN116587884A (en) Control method and controller for electric sanitation vehicle and electric sanitation vehicle
CN112824130B (en) Control method and device for brake energy recovery gear and automobile
CN109421728B (en) Self-adaptive anti-shake control method and device for automobile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant