CN116599414A - NVH performance optimization method, device, equipment and medium for permanent magnet synchronous motor - Google Patents

Abstract

The application discloses a method, a device, equipment and a medium for optimizing NVH performance of a permanent magnet synchronous motor, and belongs to the technical field of permanent magnet synchronous motors. The method comprises the following steps: determining structural parameters with sensitivity meeting set requirements as optimization parameters in response to sensitivity results of the structural parameters of the rotor to the optimization targets, wherein the optimization targets at least comprise a motor torque target value, a torque pulsation target value and an electromagnetic force target value; and adjusting the optimization parameters of the rotor based on a pre-established rotor parameterized model of the permanent magnet motor, and optimizing the performance parameters of the motor to enable the performance parameters to reach the corresponding optimization targets, wherein the performance parameters at least comprise motor torque, torque pulsation and electromagnetic force. According to the method, the rotor structure of the motor is changed by adjusting each optimization parameter, so that the motor torque, torque pulsation and electromagnetic force of the motor reach the optimization targets, and the NVH performance of the motor is optimized.

Description

Permanent magnet synchronous motor NVH performance optimization method, device, equipment and medium

technical field

The invention relates to the technical field of permanent magnet synchronous motors, in particular to a method, device, equipment and medium for optimizing the NVH performance of permanent magnet synchronous motors.

Background technique

Compared with other motors, permanent magnet synchronous motor (PMSM) has the characteristics of high power density and high output torque, and is currently the main research direction of new energy vehicle drive motors. As people's pursuit of driving experience is getting higher and higher, noise (Noise), vibration (Vibration), and comfort (Harshness), that is, NVH performance indicators, are also playing an increasingly important role in the competition of the new energy vehicle industry. Therefore, it is necessary to study the NVH performance optimization of permanent magnet synchronous motors.

In related technologies, the control algorithm of the motor is usually optimized to realize the performance optimization of the NVH of the motor. For example, a related patent (the patent publication number is CN110661470A) provides a frequency shaking control algorithm based on PWM switching frequency. By injecting different frequency shaking models in different speed segments, the PWM frequency conversion follows the set unique frequency shaking model. Drive the motor, thereby effectively reducing the NVH vibration noise of the motor, and realizing the performance optimization of the NVH of the motor.

However, it is relatively complicated to optimize the control algorithm of the motor, and the above method cannot improve the influence of the structure of the motor body on the NVH performance of the motor.

Contents of the invention

In view of the above problems, the present invention provides a permanent magnet synchronous motor NVH performance optimization method, device, equipment and medium that overcomes the above problems or at least partially solves the above problems. The method changes the rotor structure of the motor by adjusting various optimization parameters, Make the motor torque, torque ripple and electromagnetic force of the motor reach the optimization target, so as to realize the optimization of the NVH performance of the motor.

In a first aspect, the present invention provides a method for optimizing the NVH performance of a permanent magnet synchronous motor, the method comprising:

Responding to the sensitivity results of each structural parameter of the rotor to the optimization target, determine the structural parameter whose sensitivity meets the set requirements as the optimization parameter, and the optimization target includes at least the motor torque target value, the torque ripple target value and the electromagnetic force target value;

Based on the pre-established rotor parameterized model of the permanent magnet motor, the optimization parameters of the rotor are adjusted, and the performance parameters of the motor are optimized, so that the performance parameters reach the corresponding optimization goals, and the performance parameters include at least the motor rotation speed. torque, torque ripple and electromagnetic force.

Optionally, the structural parameters whose sensitivity is determined to meet the set requirements are used as optimization parameters, including:

Determining a structural parameter with a sensitivity higher than a set sensitivity threshold as the optimization parameter corresponding to each of the optimization objectives; or,

The first n structural parameters with the highest sensitivity are determined as the optimization parameters corresponding to each of the optimization objectives, where n is a positive integer greater than 0.

Optionally, the rotor includes a rotor punch and a plurality of magnetic steels arranged on the rotor punch;

The various structural parameters of the rotor include at least: the included angle of the magnetic steel, the embedding depth of the magnetic steel, and the size of the auxiliary slot for punching the rotor.

Optionally, before responding to the results of the sensitivity of each parameter of the rotor to the optimization target, the method further includes:

The sensitivity results of each structural parameter of the rotor to the optimization target are determined according to the following formula:

Wherein, y represents the optimization goal, V(y) represents the variance of the optimization goal y, Avg(y/ _xi ) represents the average value of the optimization goal y( _xi ), and V[Avg(y/xi)] represents Avg The variance of (y/xi), S( _xi ) represents the sensitivity of _xi to the optimization target y, and _xi represents the structural parameters of the rotor.

Optionally, the parameterized model of the rotor based on the pre-established permanent magnet motor, adjusting the optimization parameters of the rotor, optimizing the performance parameters of the motor, so that the performance parameters reach the corresponding optimization goals, including:

Based on the pre-established rotor parametric model of the permanent magnet motor, parameterize the motor speed, current and current phase angle, and solve the corresponding motor torque at the set speed, set current and set current phase angle of the motor , torque ripple and electromagnetic force;

When at least one of the motor torque, torque ripple, and electromagnetic force corresponding to the set speed, set current, and set current phase angle of the motor fails to reach the optimization target, adjust the optimization parameters of the rotor until The motor torque, torque ripple and electromagnetic force corresponding to the motor at the set speed, set current and set current phase angle all reach the optimization target.

Optionally, the method also includes:

When the performance parameter reaches the optimization target, a new rotor parameter model is established based on the adjusted optimization parameter;

Perform coupling analysis on the new rotor parameter model and the motor stator mode to obtain the motor vibration response;

Judging whether the current rotor structure meets the NVH performance requirements of the motor according to the vibration response of the motor;

In response to when the current rotor structure satisfies the NVH performance requirement of the electric machine, the current rotor structure is output.

Optionally, the method also includes:

Responding to when the current rotor structure does not meet the NVH performance requirements of the motor, readjust the optimization parameters of the rotor until the performance parameters reach the optimization target, and when the improved rotor structure meets the NVH performance requirements of the motor, output the improved The rear rotor structure.

In a second aspect, the present invention provides a permanent magnet synchronous motor NVH performance optimization device, the device comprising:

The optimization parameter determination module is used to determine the structural parameters whose sensitivities meet the set requirements as optimization parameters in response to the sensitivity results of each structural parameter of the rotor to the optimization target, and the optimization target includes at least the motor torque target value, torque Pulse target value and electromagnetic force target value;

An optimization module, configured to adjust the optimization parameters of the rotor based on the pre-established parameterized model of the rotor of the permanent magnet motor, and optimize the performance parameters of the motor so that the performance parameters reach the corresponding optimization target, and the performance The parameters include at least motor torque, torque ripple and electromagnetic force.

Optionally, the optimization parameter determination module is also used for:

Determining a structural parameter with a sensitivity higher than a set sensitivity threshold as the optimization parameter corresponding to each of the optimization objectives; or,

The first n structural parameters with the highest sensitivity are determined as the optimization parameters corresponding to each of the optimization objectives, where n is a positive integer greater than 0.

Optionally, the rotor includes a rotor punch and a plurality of magnetic steels arranged on the rotor punch;

The various structural parameters of the rotor include at least: the included angle of the magnetic steel, the embedding depth of the magnetic steel, and the size of the auxiliary slot for punching the rotor.

Optionally, the device also includes a sensitivity determination module, configured to:

The sensitivity results of each structural parameter of the rotor to the optimization target are determined according to the following formula:

Wherein, y represents the optimization goal, V(y) represents the variance of the optimization goal y, Avg(y/ _xi ) represents the average value of the optimization goal y( _xi ), and V[Avg(y/xi)] represents Avg The variance of (y/xi), S( _xi ) represents the sensitivity of _xi to the optimization target y, and _xi represents the structural parameters of the rotor.

Optionally, the optimization module is also used for:

Based on the pre-established rotor parametric model of the permanent magnet motor, parameterize the motor speed, current and current phase angle, and solve the corresponding motor torque at the set speed, set current and set current phase angle of the motor , torque ripple and electromagnetic force;

When at least one of the motor torque, torque ripple, and electromagnetic force corresponding to the set speed, set current, and set current phase angle of the motor fails to reach the optimization target, adjust the optimization parameters of the rotor until The motor torque, torque ripple and electromagnetic force corresponding to the motor at the set speed, set current and set current phase angle all reach the optimization target.

Optionally, the device further includes a rotor structure determination module, configured to:

When the performance parameter reaches the optimization target, a new rotor parameter model is established based on the adjusted optimization parameter;

Perform coupling analysis on the new rotor parameter model and the motor stator mode to obtain the motor vibration response;

Judging whether the current rotor structure meets the NVH performance requirements of the motor according to the vibration response of the motor;

In response to when the current rotor structure satisfies the NVH performance requirement of the electric machine, the current rotor structure is output.

Optionally, the rotor structure determining module is also used for:

Responding to when the current rotor structure does not meet the NVH performance requirements of the motor, readjust the optimization parameters of the rotor until the performance parameters reach the optimization target, and when the improved rotor structure meets the NVH performance requirements of the motor, output the improved The rear rotor structure.

In a third aspect, the present invention provides an electronic device, including: a memory and a processor, the memory and the processor are connected in communication with each other, and computer instructions are stored in the memory, and the processor executes the said computer instructions, thereby performing the method as described in the first aspect.

In a fourth aspect, the present invention provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and the computer instructions are used to make the computer execute the method as described in the first aspect.

The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

The NVH performance optimization method, device, equipment and medium of a permanent magnet synchronous motor provided in the embodiments of the present invention optimize the NVH performance of the motor by setting multiple optimization objectives, and the optimization effect is better. Then, according to the sensitivity results of each structural parameter of the rotor to the optimization target, the optimization parameters are determined, which can accurately locate the structural parameters that need to be adjusted in the rotor structure and reduce the amount of parameter adjustment. Finally, by adjusting various optimization parameters and changing the rotor structure of the motor, the motor torque, torque ripple and electromagnetic force of the motor can be optimized to achieve the optimization of the NVH performance of the motor.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 is a flow chart of a method for optimizing the NVH performance of a permanent magnet synchronous motor provided by an embodiment of the present invention;

Fig. 2 is a partial structural schematic diagram of a rotor provided by an embodiment of the present invention;

Fig. 3 is an optimized motor vibration response diagram provided by an embodiment of the present invention;

Fig. 4 is a motor vibration response diagram before optimization provided by an embodiment of the present invention;

Fig. 5 is an optimized motor noise radiation diagram provided by an embodiment of the present invention;

Fig. 6 is a motor noise radiation diagram before optimization provided by an embodiment of the present invention;

Fig. 7 is a structural block diagram of a permanent magnet synchronous motor NVH performance optimization device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a flow chart of a method for optimizing the NVH performance of a permanent magnet synchronous motor provided by an embodiment of the present invention. As shown in Fig. 1, the control method includes:

Step S110, in response to the results of the sensitivity of each structural parameter of the rotor to the optimization target, determine the structural parameter whose sensitivity meets the set requirement as the optimization parameter.

Wherein, the optimization target at least includes a motor torque target value, a torque ripple target value and an electromagnetic force target value. The motor torque target value, the torque ripple target value and the electromagnetic force target value can be specifically set by those skilled in the art according to actual needs, which is not limited in this embodiment.

The torque ripple of the motor refers to the periodic change of the output torque of the motor. It is usually caused by an uneven magnetic field inside the motor or an imbalance in the mechanical system. Torque ripple will have adverse effects on the operation of the motor, including reducing the running stability of the motor, increasing noise, and accelerating the wear of mechanical parts. Therefore, the motor NVH performance can be improved by optimizing the motor torque ripple. Both the motor torque and the electromagnetic force are directly related to the NVH performance of the motor. Therefore, in this embodiment, by setting three optimization objectives, the NVH performance of the motor is optimized from multiple aspects to ensure the optimization effect.

Fig. 2 is a partial structural schematic diagram of a rotor provided by an embodiment of the present invention. As shown in Fig. 2 , the rotor includes a rotor punch 21 and a plurality of magnetic steels 22 arranged on the rotor punch. In this embodiment, the rotor punch 21 has a plurality of first-layer V-shaped magnetic steel grooves arranged along the circumferential direction of the rotor punch, and a plurality of second-layer V-shaped magnetic steel grooves arranged along the circumferential direction of the rotor punch. Steel channels, multiple second-layer V-shaped magnetic steel grooves and multiple first-layer V-shaped magnetic steel grooves are arranged in one-to-one correspondence, and a first-layer V-shaped magnetic steel groove is provided at the opening of each second-layer V-shaped magnetic steel groove. type magnetic steel slot. The plurality of magnetic steels 22 includes a plurality of first group magnetic steels 221 arranged in a plurality of V-shaped magnetic steel grooves of the first layer in one-to-one correspondence, and arranged in a plurality of V-shaped magnetic steel grooves of the second layer in one-to-one correspondence. A plurality of second group magnets 222 in.

In this embodiment, the various structural parameters of the rotor at least include: Angle_V of the magnetic steel, the embedding depth D of the magnetic steel, and the size of the auxiliary groove of the rotor stamping. Wherein, the dimensions of the auxiliary slot of the rotor punch include the center angle R_slot_V of the auxiliary slot, the angle Alfa of the auxiliary slot and the depth h of the auxiliary slot.

Specifically, as shown in FIG. 2 , each first group of magnets 221 includes two first magnets, and the included angle between the two first magnets is Angle_V1. The embedding depth of the magnets of the first group of magnets 221 is D1. The center angle of the first auxiliary slot is R_slot_V1, the included angle of the first auxiliary slot is Alfa1, and the depth of the first auxiliary slot is h1.

Each first group of magnets 221 includes two second magnets, and the included angle between the two second magnets is Angle_V2. The embedding depth of the magnets of the second group of magnets 221 is D2. The center angle of the second auxiliary slot is R_slot_V2, the included angle of the second auxiliary slot is Alfa2, and the depth of the second auxiliary slot is h2.

It should be noted that, in this embodiment, the length of each first magnet is Mag_L1 and the width is Mag_H1; the length of each second magnet is Mag_L2 and the width is Mag_H2. The size parameters corresponding to each magnet (that is, the length and width of the first magnet, and the length and width corresponding to the second magnet) are fixed. Under the condition that the size of the magnetic steel remains unchanged, other structural parameters of the rotor are optimized.

Optionally, before performing step S110, the method further includes:

The sensitivity results of each structural parameter of the rotor to the optimization target are determined according to the following formula:

Among them, y represents the optimization goal, V(y) represents the variance of the optimization goal y, Avg(y/ _xi ) represents the average value of the optimization goal y( _xi ), V[Avg(y/xi)] represents Avg(y /xi), S(xi ₎ represents the sensitivity of _xi to the optimization target y, and _xi represents the structural parameters of the rotor.

In this embodiment, for different optimization objectives (namely motor torque target value, torque ripple target value and electromagnetic force target value), the sensitivity of each structural parameter of the rotor to each optimization target can be calculated by using the above formula result. Since each structural parameter of the rotor has a different influence on the motor torque, torque ripple, and electromagnetic force, the optimization parameters can be determined according to the sensitivity of each structural parameter to the optimization target, which can more efficiently parameterize the rotor structure. , which is beneficial to reduce the amount of parameter adjustment.

In an implementation of this embodiment, in step S110, the structural parameters whose sensitivity meets the set requirements are determined as optimization parameters, which may include:

The structural parameters whose sensitivity is higher than the set sensitivity threshold are determined as the optimization parameters corresponding to each optimization objective.

Wherein, setting the sensitivity threshold may be set by those skilled in the art according to experience or actual needs, which is not limited in this embodiment.

For different optimization objectives, the optimization parameters corresponding to each optimization objective can be determined according to the sensitivity results. For example, for the motor torque target value, when the sensitivity results of the various structural parameters of the rotor to the motor torque target value show that the sensitivity of the structural parameters A and B is higher than the sensitivity threshold, the structural parameter A can be determined and B are optimization parameters; for the electromagnetic force target value, when the sensitivity of each structural parameter of the rotor to the motor torque target is found to be higher than the sensitivity threshold of the structural parameter C, the structural parameter C is also determined as an optimization parameter.

In another implementation of this embodiment, in step S110, the structural parameters whose sensitivity meets the set requirements are determined as optimization parameters, which may include:

The first n structural parameters with the highest sensitivity are determined as the optimization parameters corresponding to each optimization objective, and n is a positive integer greater than 0.

The number of n can be set by those skilled in the art based on experience or actual needs. For different optimization objectives, the value of n can be the same or different, which is not limited in this embodiment.

Exemplarily, for the motor torque target value, the first two structural parameters with the highest sensitivity can be selected as optimization parameters; for the sum of the torque ripple target value and the electromagnetic force target value, the top two most sensitive 2 structure parameters as optimization parameters etc.

Step S120 , based on the pre-established parameterized model of the rotor of the permanent magnet motor, the optimization parameters of the rotor are adjusted, and the performance parameters of the motor are optimized, so that the performance parameters reach the corresponding optimization target.

Wherein, the performance parameters at least include motor torque, torque ripple and electromagnetic force.

Optionally, step S120 includes:

Based on the pre-established rotor parametric model of the permanent magnet motor, parameterize the motor speed, current and current phase angle, and solve the corresponding motor torque at the set speed, set current and set current phase angle of the motor , torque ripple and electromagnetic force;

When at least one of the corresponding motor torque, torque ripple and electromagnetic force under the set speed, set current and set current phase angle of the motor does not reach the optimization target, adjust the optimization parameters of the rotor until the motor is at the set The corresponding motor torque, torque ripple and electromagnetic force under the speed, set current and set current phase angle all reach the optimization target.

In this embodiment, the rotational speed, current and current phase angle of the motor can be parameterized with reference to Table 1 below.

Table 1

serial number Rotating speed electric current phase angle 1 1000 I ₁ δ ₁ 2 2000 I ₂ δ ₂ 3 3000 I ₃ δ ₃ 4 4000 I ₄ δ ₄ 5 5000 I ₅ δ ₅ 6 6000 I ₆ δ ₆ 7 7000 I ₇ δ ₇ 8 8000 I ₈ δ ₈ 9 9000 i ₉ δ ₉ 10 10000 I ₁₀ δ ₁₀

It can be seen from the above table 1 that in this embodiment, the set rotational speed may be multiple rotational speeds within 1000-10000 r/min, so as to cover the full rotational speed condition. The set current may be the peak current of the motor under the peak working condition, and the set phase angle may be the current control angle under the corresponding peak current.

In actual implementation, the parameterized model of the rotor of the permanent magnet motor can be pre-established by using the motor electromagnetic simulation software Maxwell. Then, the parameterized model of the rotor is imported into the electromagnetic force optimization calculation software ENOS, and the motor speed, current and current phase angle are parameterized in the software, and the electromagnetic force optimization calculation software simulates and outputs the motor at the set speed, set Corresponding motor torque, torque ripple and electromagnetic force under constant current and set current phase angle. When the simulation results show that at least one of the motor torque, torque ripple, and electromagnetic force corresponding to the set speed, set current, and set current phase angle of the motor does not reach the optimization target, the optimized parameters of the rotor are adjusted, and the The genetic algorithm optimizes the optimized target torque, torque ripple and electromagnetic force of the motor until the simulation results show the corresponding motor torque, torque ripple and electromagnetic force under the set speed, set current and set current phase angle of the motor. reach the optimization goal. The electromagnetic force optimization calculation software can quickly optimize the torque, torque ripple and electromagnetic force of the corresponding order under the full speed condition through the genetic algorithm.

It should be noted that both the electromagnetic force and the target value of the electromagnetic force in this embodiment correspond to the 18th order radial electromagnetic force of the motor, so as to optimize the electromagnetic force of the corresponding order noise.

Optionally, the method also includes:

When the performance parameters reach the optimization target, a new rotor parameter model is established based on the adjusted optimization parameters;

Coupling analysis of the new rotor parameter model and the motor stator mode to obtain the motor vibration response;

Judging whether the current rotor structure meets the NVH performance requirements of the motor according to the vibration response of the motor;

In response to when the current rotor structure satisfies the NVH performance requirement of the electric machine, the current rotor structure is output.

In response to when the current rotor structure does not meet the NVH performance requirements of the motor, the optimization parameters of the rotor are readjusted until the performance parameters reach the optimization target, and when the improved rotor structure meets the NVH performance requirements of the motor, the improved rotor structure is output.

In this embodiment, the coupling analysis of the new rotor parameter model and the motor stator mode can be performed in the electromagnetic force optimization calculation software ENOS, and the vibration response of the motor can be output to obtain the optimized vibration response diagram of the motor. Then the motor vibration response results are processed, and the optimized motor noise radiation diagram is output. According to the optimized motor vibration response diagram and the optimized motor noise radiation diagram, the noise distribution and the sound pressure level at each speed can be identified to determine whether the current rotor structure meets the NVH performance requirements of the motor.

Fig. 3 is an optimized motor vibration response diagram provided by an embodiment of the present invention, and Fig. 4 is a pre-optimized motor vibration response diagram provided by an embodiment of the present invention. By comparing Fig. 3 and Fig. 4, it can be known that the present invention After the optimization method provided, the vibration performance of the motor is improved.

Figure 5 is an optimized motor noise radiation diagram provided by an embodiment of the present invention, and Figure 6 is a pre-optimized motor noise radiation diagram provided by an embodiment of the present invention. After the optimization method provided, the electromagnetic noise generated by the motor is improved.

Based on the same inventive concept, the embodiment of the present invention also provides a permanent magnet synchronous motor NVH performance optimization device, Figure 7 is a structural block diagram of a permanent magnet synchronous motor NVH performance optimization device provided by the embodiment of the present invention, as shown in Figure 7 As shown, the apparatus 700 includes an optimization parameter determination module 710 and an optimization module 720 .

The optimization parameter determination module 710 is used to respond to the sensitivity results of the various structural parameters of the rotor to the optimization target, and determine the structural parameters whose sensitivity meets the set requirements as the optimization parameter. The optimization target includes at least the motor torque target value, torque ripple target value and electromagnetic force target value;

The optimization module 720 is used to adjust the optimization parameters of the rotor based on the pre-established rotor parameterized model of the permanent magnet motor, optimize the performance parameters of the motor, and make the performance parameters reach the corresponding optimization goals. The performance parameters include at least the motor torque, Torque ripple and electromagnetic force.

Optionally, the optimization parameter determination module 710 is also used for:

Determining the structural parameters whose sensitivity is higher than the set sensitivity threshold as the optimization parameters corresponding to each optimization goal; or,

The first n structural parameters with the highest sensitivity are determined as the optimization parameters corresponding to each optimization objective, and n is a positive integer greater than 0.

Optionally, the rotor includes a rotor punch and a plurality of magnetic steels arranged on the rotor punch;

The various structural parameters of the rotor include at least: the included angle of the magnetic steel, the embedding depth of the magnetic steel, and the size of the auxiliary groove of the rotor punch.

Optionally, the device 700 also includes a sensitivity determination module, configured to:

The sensitivity results of each structural parameter of the rotor to the optimization target are determined according to the following formula:

Among them, y represents the optimization goal, V(y) represents the variance of the optimization goal y, Avg(y/ _xi ) represents the average value of the optimization goal y( _xi ), V[Avg(y/xi)] represents Avg(y /xi), S(xi ₎ represents the sensitivity of _xi to the optimization target y, and _xi represents the structural parameters of the rotor.

Optionally, the optimization module 720 is also used for:

Based on the pre-established rotor parametric model of the permanent magnet motor, parameterize the motor speed, current and current phase angle, and solve the corresponding motor torque at the set speed, set current and set current phase angle of the motor , torque ripple and electromagnetic force;

When at least one of the corresponding motor torque, torque ripple and electromagnetic force under the set speed, set current and set current phase angle of the motor does not reach the optimization target, adjust the optimization parameters of the rotor until the motor is at the set The corresponding motor torque, torque ripple and electromagnetic force under the speed, set current and set current phase angle all reach the optimization target.

Optionally, the device 700 also includes a rotor structure determination module, which is used for:

When the performance parameters reach the optimization target, a new rotor parameter model is established based on the adjusted optimization parameters;

Coupling analysis of the new rotor parameter model and the motor stator mode to obtain the motor vibration response;

Judging whether the current rotor structure meets the NVH performance requirements of the motor according to the vibration response of the motor;

In response to when the current rotor structure satisfies the NVH performance requirement of the electric machine, the current rotor structure is output.

Optionally, the rotor structure determination module is also used for:

In response to when the current rotor structure does not meet the NVH performance requirements of the motor, the optimization parameters of the rotor are readjusted until the performance parameters reach the optimization target, and when the improved rotor structure meets the NVH performance requirements of the motor, the improved rotor structure is output.

It can be understood that the device provided by the above embodiment is only illustrated by dividing the above functional modules. In practical applications, the above function distribution can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into Different functional modules to complete all or part of the functions described above.

An embodiment of the present invention also provides an electronic device, which may include a processor and a memory, where the processor and the memory may be communicatively connected to each other through a bus or in other ways.

The processor may be a central processing unit (Central Processing Unit, CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits in the embodiments of the present application.

Memory may include mass storage for data or instructions. By way of example and not limitation, the memory may include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive or two or more a combination of the above. Storage may include removable or non-removable (or fixed) media, where appropriate. Memory may be internal or external to the electronic device, where appropriate. In certain embodiments, the memory may be non-volatile solid-state memory.

In one example, the memory may be a read only memory (Read Only Memory, ROM). In one example, the ROM can be mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or both. A combination of one or more of the above.

The processor implements any method in the foregoing embodiments by reading and executing the computer program instructions stored in the memory.

In one example, an electronic device may include a communication interface and a bus. Wherein, the processor, the memory, and the communication interface are connected through a bus and complete mutual communication. The communication interface is mainly used to realize the communication between modules, devices, units and/or devices in the embodiments of the present application. A bus may comprise one or more buses, where appropriate.

In addition, in combination with the methods in the foregoing embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. Computer program instructions are stored on the computer-readable storage medium; when the computer program instructions are executed by a processor, any method in the above-mentioned embodiments is implemented.

The above-mentioned technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

The NVH performance optimization method, device, equipment and medium of a permanent magnet synchronous motor provided in the embodiments of the present invention optimize the NVH performance of the motor by setting multiple optimization objectives, and the optimization effect is better. Then, according to the sensitivity results of each structural parameter of the rotor to the optimization target, the optimization parameters are determined, which can accurately locate the structural parameters that need to be adjusted in the rotor structure and reduce the amount of parameter adjustment. Finally, by adjusting various optimization parameters and changing the rotor structure of the motor, the motor torque, torque ripple and electromagnetic force of the motor can be optimized to achieve the optimization of the NVH performance of the motor.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Claims (10)

1. a permanent magnet synchronous motor NVH performance optimization method, is characterized in that, described method comprises: Responding to the sensitivity results of each structural parameter of the rotor to the optimization target, determine the structural parameter whose sensitivity meets the set requirements as the optimization parameter, and the optimization target includes at least the motor torque target value, the torque ripple target value and the electromagnetic force target value; Based on the pre-established rotor parameterized model of the permanent magnet motor, the optimization parameters of the rotor are adjusted, and the performance parameters of the motor are optimized, so that the performance parameters reach the corresponding optimization goals, and the performance parameters include at least the motor rotation speed. torque, torque ripple and electromagnetic force. 2. The method according to claim 1, wherein said determination of the structural parameters whose sensitivities meet the set requirements is used as an optimization parameter, comprising: Determining a structural parameter with a sensitivity higher than a set sensitivity threshold as the optimization parameter corresponding to each of the optimization objectives; or, The first n structural parameters with the highest sensitivity are determined as the optimization parameters corresponding to each of the optimization objectives, where n is a positive integer greater than 0. 3. The method according to claim 1, wherein the rotor comprises a rotor punch and a plurality of magnets disposed on the rotor punch; The various structural parameters of the rotor include at least: the included angle of the magnetic steel, the embedding depth of the magnetic steel, and the size of the auxiliary slot for punching the rotor. 4. The method according to claim 1, characterized in that, before the sensitivity result of each parameter of the rotor in response to the optimization target, the method further comprises: The sensitivity results of each structural parameter of the rotor to the optimization target are determined according to the following formula: Wherein, y represents the optimization goal, V(y) represents the variance of the optimization goal y, Avg(y/ _xi ) represents the average value of the optimization goal y( _xi ), and V[Avg(y/xi)] represents Avg The variance of (y/xi), S( _xi ) represents the sensitivity of _xi to the optimization target y, and _xi represents the structural parameters of the rotor. 5. The method according to claim 1, characterized in that, the rotor parameterization model based on the pre-established permanent magnet motor adjusts the optimization parameters of the rotor and optimizes the performance parameters of the motor so that the performance parameters to achieve the corresponding optimization goals, including: Based on the pre-established rotor parametric model of the permanent magnet motor, parameterize the motor speed, current and current phase angle, and solve the corresponding motor torque at the set speed, set current and set current phase angle of the motor , torque ripple and electromagnetic force; When at least one of the motor torque, torque ripple, and electromagnetic force corresponding to the set speed, set current, and set current phase angle of the motor fails to reach the optimization target, adjust the optimization parameters of the rotor until The motor torque, torque ripple and electromagnetic force corresponding to the motor at the set speed, set current and set current phase angle all reach the optimization target. 6. The method according to claim 1, further comprising: When the performance parameter reaches the optimization target, a new rotor parameter model is established based on the adjusted optimization parameter; Perform coupling analysis on the new rotor parameter model and the motor stator mode to obtain the motor vibration response; Judging whether the current rotor structure meets the NVH performance requirements of the motor according to the vibration response of the motor; In response to when the current rotor structure satisfies the NVH performance requirement of the electric machine, the current rotor structure is output. 7. The method according to claim 6, further comprising: Responding to when the current rotor structure does not meet the NVH performance requirements of the motor, readjust the optimization parameters of the rotor until the performance parameters reach the optimization target, and when the improved rotor structure meets the NVH performance requirements of the motor, output the improved The rear rotor structure. 8. A permanent magnet synchronous motor NVH performance optimization device, characterized in that the device comprises: The optimization parameter determination module is used to determine the structural parameters whose sensitivities meet the set requirements as optimization parameters in response to the sensitivity results of each structural parameter of the rotor to the optimization target, and the optimization target includes at least the motor torque target value, torque Pulse target value and electromagnetic force target value; An optimization module, configured to adjust the optimization parameters of the rotor based on the pre-established parameterized model of the rotor of the permanent magnet motor, and optimize the performance parameters of the motor so that the performance parameters reach the corresponding optimization target, and the performance The parameters include at least motor torque, torque ripple and electromagnetic force. 9. An electronic device, characterized in that it comprises: a memory and a processor, the memory and the processor are connected in communication with each other, computer instructions are stored in the memory, and the processor executes the computer instruction, thereby performing the method described in any one of claims 1-7. 10. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to make the computer execute the method according to any one of claims 1-7 .