Motor heating method and device, electronic device and storage medium

Abstract

Embodiments of the present application provide a motor heating method and device, electronic equipment and storage medium, wherein the method comprises: in response to a heating signal, the heating signal comprising a heating requirement, determining a direct current amplitude and an alternating current amplitude according to the heating requirement and a preset relationship; inputting the direct current to a direct axis of the motor according to the direct current amplitude; inputting the alternating current to a cross axis of the motor according to the alternating current amplitude; the preset relationship is: I q,amp is the alternating current amplitude, I d,bias is the direct current amplitude. The above embodiments make the motor phase windings heat uniformly, which can effectively improve the heating power.

Description

TECHNICAL FIELD

[0001] The present application relates to the motor technology field of new energy vehicles, in particular to a motor heating method and device, electronic equipment and computer readable storage medium. BACKGROUND

[0002] At present, the whole vehicle cost of new energy electric vehicles is high. In order to reduce the whole vehicle parts and reduce the cost, the motor auxiliary heating is used to replace the PTC heat generation.

[0003] The traditional motor auxiliary heating method is to pass current in the direct axis direction of the permanent magnet synchronous motor, which can be direct current or alternating current, so as to generate heat. In this mode, the motor three-phase winding current is unbalanced. Even if the maximum one-phase winding reaches the temperature limit, the temperature of the other two phases usually does not reach the temperature limit, so the motor heating capacity is not fully utilized. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a motor heating method, device, electronic equipment and computer readable storage medium, which can improve the heating capacity of the motor.

[0005] In a first aspect, the embodiment of the present application provides a motor heating method, comprising:

[0006] In response to a heating signal, the heating signal includes a heating requirement, the amplitude of the direct current and the amplitude of the alternating current are determined according to the heating requirement and a preset relationship;

[0007] The direct current is input to the direct axis of the motor according to the amplitude of the direct current;

[0008] The alternating current is input to the cross axis of the motor according to the amplitude of the alternating current;

[0009] The preset relationship is:

[0010] ;

[0011] Wherein, is the amplitude of the alternating current, is the amplitude of the direct current, is 0 to .

[0012] In the above implementation process, the motor is heated in response to the heating signal, the direct current is passed to the direct axis of the motor, and the alternating current is passed to the cross axis of the motor. When the amplitudes of the direct current and the alternating current satisfy , the effective value of the motor three-phase current is just equal, the motor three-phase heating is balanced, so as to realize the maximization of the motor heating power, and the motor three-phase synchronous heating. In other cases, the body shaking or noise can be relieved.

[0013] Further, the method further comprises:

[0014] obtaining a jitter state of the current vehicle;

[0015] adjusting the current frequency of the alternating current according to the jitter state.

[0016] In the above implementation process, since there is an alternating current in the cross axis, an alternating torque is generated in the heating process, which may cause the vehicle body to jitter. The lower the frequency or the larger the alternating current, the greater the possibility of vehicle body jitter. By adjusting the frequency of the alternating current according to the jitter state of the current vehicle, the jitter state of the vehicle can be adjusted, and the user experience can be improved.

[0017] Further, the step of adjusting the frequency of the direct current and the alternating current according to the jitter state comprises:

[0018] if the jitter state of the vehicle exceeds a preset range;

[0019] then the frequency of the alternating current is increased.

[0020] In the above implementation process, when the jitter state of the vehicle exceeds the preset range, the frequency of the alternating current is increased, thereby reducing the jittering effect of the motor heating process on the vehicle itself, and thus dynamically increasing the use frequency.

[0021] Further, the method further comprises: obtaining a current motor noise;

[0022] adjusting the current frequency of the alternating current according to the current motor noise.

[0023] In the above implementation process, the noise of the motor affects the auditory experience of the user, and adjusting the current frequency of the alternating current according to the current motor noise can improve the user experience.

[0024] Further, the step of adjusting the current frequency of the alternating current according to the current motor noise comprises:

[0025] if the motor noise exceeds a preset range;

[0026] then the frequency of the alternating current is reduced.

[0027] In the above implementation process, when the motor noise exceeds the preset range, the frequency of the alternating current is reduced, which can improve the user experience.

[0028] Further, the direct current is forward biased.

[0029] In the above implementation process, the torque fluctuation of the motor can be smaller.

[0030] Further, the initial frequency of the alternating current is 50Hz-500Hz.

[0031] In the implementation process, the frequency makes the noise and jitter small, and the user experience is high.

[0032] In a second aspect, the embodiments of the present application provide an electric motor heating device, comprising:

[0033] a response module, in response to a heating signal, the heating signal comprising a heating requirement, determining the amplitude of the direct current and the amplitude of the alternating current according to the heating requirement and a preset relationship;

[0034] an input module, configured to input the direct current to the direct axis of the electric motor according to the amplitude of the direct current, and input the alternating current to the cross axis of the electric motor according to the amplitude of the alternating current;

[0035] The preset relationship is:

[0036] ;

[0037] wherein, is the amplitude of the alternating current, is the amplitude of the direct current, is 0 to .

[0038] In the implementation process, the electric motor is heated in response to the heating signal, the direct current is input to the direct axis of the electric motor, and the alternating current is input to the cross axis of the electric motor, wherein when the amplitudes of the direct current and the alternating current satisfy , the effective values of the three-phase currents of the electric motor are the same, the three-phase heating of the electric motor is balanced, thereby realizing the maximization of the heating power of the electric motor, and the electric motor is heated synchronously. In other cases, the body jitter or noise can be alleviated.

[0039] In a third aspect, the embodiments of the present application provide an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to realize the steps of the method of any one of the first aspect.

[0040] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, and the computer readable storage medium stores instructions, and when the instructions are executed on a computer, the computer executes the method of any one of the first aspect.

[0041] Other features and advantages of the present application will be described in the following description, or can be known or determined from the description without doubt, or can be known by implementing the above-mentioned technology disclosed in the present application.

[0042] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to as follows. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0044] Figure 1 The motor heating method provided by the embodiments of the present application;

[0045] Figure 2 The schematic diagram of three-phase current provided by the embodiments of the present application;

[0046] Figure 3 The motor heating device provided by the embodiments of the present application;

[0047] Figure 4 The structural schematic diagram of the electronic device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described below in combination with the drawings in the embodiments of the present application.

[0049] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. Meanwhile, in the description of the present application, the terms “first”, “second” and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0050] Embodiment 1

[0051] Referring to Figure 1 The embodiments of the present application provide a motor heating method, comprising:

[0052] S1: in response to a heating signal, the heating signal comprising a heat generation requirement, determining the amplitude of the direct current and the amplitude of the alternating current according to the heat generation requirement and a preset relationship;

[0053] S2: inputting the direct current to the direct axis of the motor according to the amplitude of the direct current;

[0054] S3: inputting the alternating current to the cross axis of the motor according to the amplitude of the alternating current;

[0055] The preset relationship is:

[0056] ;

[0057] wherein, is the amplitude of the alternating current, is the amplitude of the direct current, is 0 to .

[0058] It can be understood that, may be .

[0059] In the above implementation process, in response to the heating signal, the motor is heated, the direct axis of the motor is passed through the direct current, and the cross axis of the motor is passed through the alternating current, wherein when the amplitudes of the direct current and the alternating current meet , the effective value of the three-phase current of the motor is the same, the three-phase heating of the motor is balanced, thereby realizing the maximization of the motor heating power and synchronously heating the motor three-phase.

[0060] Exemplarily, the current input motor direct axis is =300A, =424sin(2π*200t); the three-phase current (Iu, Iv, Iw) of the three-phase motor is as shown in Figure 2 ;

[0061] The current calculation formula of the direct axis and the cross axis is as follows:

[0062] ;

[0063] wherein, I D is the direct axis passing current, I Q is the cross axis passing current, I 0 is the amplitude, f ac is the cross axis alternating frequency.

[0064] Suppose the motor stator rotation angle is , then the three-phase current of the motor is respectively:

[0065] ;

[0066] Further, the effective value of the motor three-phase current (u, v, w) is

[0067] ;

[0068] It can be seen that, based on the above embodiment, the effective values of the three-phase currents of the motor are the same, so the three-phase heating of the motor is balanced, so that the three-phase of the motor can be heated synchronously to the allowable temperature of the motor, thereby maximizing the heating power of the motor.

[0069] Meanwhile, the torque of the permanent magnet synchronous motor can be obtained in the following way:

[0070] ;

[0071] wherein, L D is the inductance of the direct axis of the motor, L Q is the inductance of the quadrature axis of the motor; L D -L Q <0, is the flux of the permanent magnet.

[0072] It can be seen that the motor torque is a high-frequency alternating torque with a mean value of zero. The average torque is 0, so the vehicle will not move forward or backward at this time. However, if the high-frequency torque is large enough, it may cause the vehicle body to vibrate. Especially if the amplitude of the motor rotor under the action of the high-frequency torque exceeds the clearance of the output shaft end, a more obvious vibration will be generated.

[0073] In order to further improve the driving experience of the user, the method further comprises:

[0074] obtaining the vibration state of the current vehicle;

[0075] adjusting the frequency of the alternating current according to the vibration state.

[0076] Exemplarily, the vibration state of the vehicle can be obtained through the motor speed signal or the acceleration sensor on the vehicle body.

[0077] In the above implementation process, since the heating process will cause the vehicle body to vibrate, adjusting the frequency of the alternating current according to the vibration state of the current vehicle can adjust the vibration state of the vehicle, and improve the user experience.

[0078] Further, the step of adjusting the frequency of the direct current and the alternating current according to the vibration state comprises:

[0079] if the vibration state of the vehicle exceeds a preset range;

[0080] then the frequency of the alternating current is increased.

[0081] In the above implementation process, when the vibration state of the vehicle exceeds the preset range, the frequency of the alternating current is increased, thereby reducing the influence of the motor heating process on the vibration of the vehicle itself, and improving the use frequency.

[0082] In a possible implementation, to further improve the user experience, the method further includes: acquiring the current motor noise;

[0083] adjusting the current frequency of the alternating current according to the current motor noise.

[0084] In the implementation process, the motor noise affects the auditory experience of the user, and adjusting the current frequency of the alternating current according to the current motor noise can improve the user experience.

[0085] Further, the step of adjusting the current frequency of the alternating current according to the current motor noise includes:

[0086] if the motor noise exceeds the preset range;

[0087] then reducing the frequency of the alternating current.

[0088] In the implementation process, when the motor noise exceeds the preset range, the frequency of the alternating current is reduced, so that the noise frequency is lower than the human ear sensitive frequency range, and the user experience can be improved.

[0089] Further, the direct current is forward biased.

[0090] In the implementation process, the torque fluctuation of the motor can be smaller.

[0091] Further, the initial frequency of the alternating current is 50Hz-500Hz.

[0092] In the implementation process, the frequency makes the noise and jitter smaller, and the user experience is higher.

[0093] Embodiment 2

[0094] Referring to Figure 3 , the embodiment of the present application provides a motor heating device, comprising:

[0095] a response module, in response to a heating signal, the heating signal including a heating demand, determining the amplitude of the direct current and the amplitude of the alternating current according to the heating demand and a preset relationship;

[0096] an input module, configured to input the direct current to the direct axis of the motor according to the amplitude of the direct current, and input the alternating current to the cross axis of the motor according to the amplitude of the alternating current;

[0097] The preset relationship is:

[0098] ;

[0099] wherein, is the amplitude of the alternating current, is the amplitude of the direct current, is 0 to between.

[0100] It can be understood that, may be .

[0101] In the implementation process, the direct axis of the motor is supplied with direct current and the cross axis of the motor is supplied with alternating current in response to the heating signal, and when the amplitudes of the direct current and the alternating current meet , the effective values of the three-phase currents of the motor are the same, the motor three-phase heating is balanced, thereby realizing the maximization of the motor heating power and the synchronous heating of the motor three-phase. In other cases, the body shaking or noise can be alleviated.

[0102] In one possible implementation, the device further comprises an adjusting module configured to obtain a shaking state of the current vehicle; and adjust the current frequency of the alternating current according to the shaking state.

[0103] In one possible implementation, the adjusting module is further configured to increase the frequency of the alternating current when the shaking state of the vehicle exceeds a preset range.

[0104] In one possible implementation, the adjusting module is further configured to obtain a current motor noise; and adjust the current frequency of the alternating current according to the current motor noise.

[0105] In one possible implementation, the adjusting module is further configured to decrease the frequency of the alternating current when the motor noise exceeds a preset range.

[0106] In one possible implementation, the direct current is forward biased.

[0107] In the implementation process, the non-linear characteristics of the motor inductance in the actual situation are considered, I D >0 and I Q is not equal to 0, there is no point where the torque is zero (although theoretically there is), but the same I Q In the case of increasing Id, the torque monotonically decreases, and the direct current is designed to be forward biased, which can make the torque fluctuation of the motor smaller.

[0108] In one possible implementation, the initial frequency of the alternating current is 50Hz-500Hz.

[0109] In the implementation process, the above frequency makes the noise and shaking smaller, and the user experience is higher.

[0110] The application also provides an electronic device, please see Figure 4 , Figure 4A structural block diagram of an electronic device is provided in the embodiments of the present application. The electronic device can include a processor 41, a communication interface 42, a memory 43 and at least one communication bus 44. The communication bus 44 is used to realize direct connection communication among the components. The communication interface 42 of the electronic device in the embodiments of the present application is used to communicate signaling or data with other node devices. The processor 41 can be an integrated circuit chip with signal processing capability.

[0111] The processor 41 described above can be a general processor, including a central processing unit (CPU), a network processor (NP) and the like; and can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The general processor can be a microprocessor or the processor 41 can also be any conventional processor.

[0112] The memory 43 can be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) and the like. The memory 43 stores computer readable instructions, and when the computer readable instructions are executed by the processor 41, the electronic device can perform each step involved in the above method embodiments.

[0113] Optionally, the electronic device can further include a storage controller, an input / output unit.

[0114] The memory 43, the storage controller, the processor 41, the peripheral interface and the input / output unit are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses 44. The processor 41 is used to execute executable modules stored in the memory 43, such as software function modules or computer programs included in the electronic device.

[0115] The input / output unit is used to provide a user with a creation task and create a start optional period or a preset execution time for the task to realize the interaction between the user and the server. The input / output unit can be, but is not limited to, a mouse, a keyboard and the like.

[0116] It can be understood that, Figure 4 The structure shown is only schematic, and the electronic device can further include more or fewer components than those shown in the Figure 4 embodiments, or have a different configuration from that shown in the Figure 4 embodiments. Figure 4 The components shown in the embodiments can be implemented in hardware, software or a combination thereof.

[0117] The embodiments of the present application further provide a computer readable storage medium, and the computer readable storage medium stores instructions, when the instructions are run on a computer, the computer program is executed by a processor to realize the method of the method embodiments, to avoid repetition, here is no longer repeated.

[0118] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented by other manners. The apparatus embodiments described above are only schematic, for example, the flowcharts and block diagrams in the drawings show the possible implementation architectures, functions and operations of the apparatus, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code, which contains one or more executable instructions for realizing the specified logic function. It should also be noted that, in some alternative implementation manners, the functions noted in the blocks can also occur in different order from that noted in the drawings. For example, two continuous blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that, each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be realized by a special hardware-based system which executes the specified functions or actions, or can be realized by a combination of special hardware and computer instructions.

[0119] In addition, each functional module in the embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0120] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts of the prior art that make contributions or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0121] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0122] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0123] It should be noted that, in this document, the terms such as first and second are merely used to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

Claims

1. A method for heating an electric motor, characterized in that, include: In response to a heating signal, the heating signal includes a heating demand, and the amplitude of the direct current and the amplitude of the alternating current are determined according to the heating demand and a preset relationship. The DC current is input to the direct shaft of the motor according to the amplitude of the DC current; The alternating current is input to the quadrature axis of the motor according to the amplitude of the alternating current; The preset relationship is as follows: ； in, The amplitude of the alternating current. The amplitude of the DC current. for .

2. The motor heating method according to claim 1, characterized in that, The method also includes: Obtain the current vibration status of the vehicle; Adjust the frequency of the alternating current according to the jitter state.

3. The motor heating method according to claim 2, characterized in that, The step of adjusting the frequency of the alternating current according to the jitter state includes: If the vibration of the vehicle exceeds a preset range; This increases the frequency of the alternating current.

4. The motor heating method according to claim 1, characterized in that, The method further includes: acquiring the current motor noise; The frequency of the alternating current is adjusted according to the current motor noise.

5. The motor heating method according to claim 4, characterized in that, The step of adjusting the frequency of the alternating current based on the current motor noise includes: If the motor noise exceeds the preset range; This reduces the frequency of the alternating current.

6. The motor heating method according to claim 1, characterized in that, The DC current is forward biased.

7. The motor heating method according to any one of claims 2-6, characterized in that, The initial frequency of the alternating current is 50Hz-500Hz.

8. A motor heating device, characterized in that, include: The response module responds to a heating signal, which includes a heating demand, and determines the amplitude of the direct current and the amplitude of the alternating current based on the heating demand and a preset relationship. An input module is used to input the DC current to the direct axis of the motor according to the amplitude of the DC current; and to input the AC current to the quadrature axis of the motor according to the amplitude of the AC current. The preset relationship is as follows: ； in, The amplitude of the alternating current. The amplitude of the DC current. for .

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the method as described in any one of claims 1-7.

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