WO2021227266A1

WO2021227266A1 - Method and device for detecting number of motor pole pairs, and motor controller

Info

Publication number: WO2021227266A1
Application number: PCT/CN2020/107829
Authority: WO
Inventors: 李荷洁
Original assignee: 广东威灵电机制造有限公司; 美的威灵电机技术（上海）有限公司
Priority date: 2020-05-13
Filing date: 2020-08-07
Publication date: 2021-11-18
Also published as: CN113740727B; CN113740727A

Abstract

A method and device for detecting the number of motor pole pairs, and a motor controller. The method comprises: acquiring the reference load-carrying capacity of a reference motor (S101); controlling a target motor to operate at a preset motor speed, and acquiring the current actual load-carrying capacity of the target motor (S102); and according to the actual load-carrying capacity, the reference load-carrying capacity, and parameters of the reference motor, calculating the number of pole pairs of the target motor (S103). In the method, the number of pole pairs of the target motor is calculated by means of using the parameters of the reference motor and the preset motor speed without increasing hardware costs, so that the target motor model is identified according to the number of pole pairs, and the cost of identification and the occupation of resources is reduced on the basis of ensuring the reliability and accuracy of the identification results.

Description

Motor pole pair number detection method, detection device and motor controller

Cross-references to related applications

This application is based on a Chinese patent application with an application number of 202010401605.7 and an application date of May 13, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

This application relates to the field of motor technology, and in particular to a method for detecting the number of pole pairs of a motor, a detecting device, and a motor controller.

Background technique

With the popularization and application of variable frequency drive technology in the field of home appliances, many suppliers of permanent magnet synchronous motors have emerged on the market for home appliance manufacturers to choose from. Under normal circumstances, home appliance manufacturers will introduce two or more motor suppliers for the same home appliance product to avoid the uncertainty risk of exclusive supply. This requires the motor drive control system of home appliances to be compatible with different types of motors. In this case, the motor drive control system must have the function of automatic online detection and identification of the motor model.

In the related technology, a resistance device with a specific resistance value is mainly added to the motor, and the resistance value is used as identifiable information. The motor drive control system recognizes the motor model by identifying the resistance value of the resistance. However, in addition to the high hardware cost caused by the additional identification resistor on the target motor, this solution also requires the motor controller to have a resistance measurement circuit, which results in a large amount of resources and high cost.

Summary of the invention

This application aims to solve one of the technical problems in the related technology at least to a certain extent.

To this end, the first purpose of this application is to propose a motor pole pair detection method to calculate the target motor's performance by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost. The number of pole pairs, so as to realize the identification of the target motor model according to the number of pole pairs, on the basis of ensuring the reliability and accuracy of the identification result, reducing the cost of identification and occupying resources.

The second purpose of this application is to provide a motor pole pair detection device.

The third purpose of this application is to propose a motor controller.

The fourth purpose of this application is to provide a readable storage medium.

In order to achieve the above objective, an embodiment of the first aspect of the present application proposes a method for detecting the number of pole pairs of a motor, which includes: obtaining the reference load capacity of a reference motor; controlling the operation of the target motor at the preset motor speed, and obtaining the The current actual load capacity of the target motor; and, according to the actual load capacity, the reference load capacity, and the parameters of the reference motor, calculate the number of pole pairs of the target motor.

According to the motor pole pair detection method of the embodiment of the present application, firstly, the reference load capacity of the reference motor is obtained, and then the target motor is controlled to run at the preset motor speed, and the current actual load capacity of the target motor is obtained, and then the actual load capacity of the target motor is obtained. With load capacity, reference load capacity, and reference motor parameters, calculate the number of pole pairs of the target motor. Therefore, this method calculates the number of pole pairs of the target motor by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost, so as to realize the identification of the target motor model based on the number of pole pairs. On the basis of ensuring the reliability and accuracy of the recognition results, the cost of recognition and the occupation of resources are reduced.

In order to achieve the above objective, an embodiment of the second aspect of the present application proposes a motor pole pair detection device, which includes: an acquisition module for acquiring the reference belt load capacity of the reference motor; and for acquiring the current actual belt load capacity of the target motor Load capacity; a control module for controlling the operation of the target motor at the preset motor speed; a calculation module for calculating the actual load capacity, reference load capacity, and parameters of the reference motor The number of pole pairs of the target motor.

According to the motor pole pair detection device of the embodiment of the present application, the reference load capacity of the reference electrode is acquired through the acquisition module, the target motor is controlled to run at the preset motor speed through the control module, and the current target motor is acquired through the acquisition module. The actual load capacity; the calculation module calculates the number of pole pairs of the target motor according to the actual load capacity, the reference load capacity, and the parameters of the reference motor. Therefore, the control device calculates the number of pole pairs of the target motor by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost, so as to realize the identification of the target motor model based on the number of pole pairs. , On the basis of ensuring the reliability and accuracy of the recognition results, the cost of recognition and the occupation of resources are reduced.

In addition, the motor pole pair detection device according to the foregoing embodiment of the present application may also have the following additional technical features:

According to an embodiment of the present application, the control module is further configured to: determine the model of the target motor according to the number of pole pairs of the target motor; and determine the target control mode according to the model of the target motor.

In order to achieve the above objective, an embodiment of the third aspect of the present application proposes a motor controller, which includes: at least one processor; and a memory communicatively connected with the at least one processor; An instruction executed by the at least one processor, the instruction being executed by the at least one processor, so that the at least one processor can execute the method for detecting the number of motor pole pairs proposed in the embodiment of the first aspect of the present application.

The motor controller of the embodiment of the present application, when the instructions stored in the memory are executed by at least one processor, can calculate the target by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost. The number of pole pairs of the motor, so as to realize the identification of the target motor model according to the number of pole pairs. On the basis of ensuring the reliability and accuracy of the identification result, the identification cost and resource occupation are reduced.

In order to achieve the above objective, the embodiment of the fourth aspect of the present application proposes a readable storage medium on which a motor pole pair detection program is stored. When the program is executed by the processor, the Motor pole pair detection method.

In the readable storage medium of the embodiment of the present application, when the motor pole pair detection program stored on it is executed by the processor, it can use the reference load capacity of the reference motor and the preset preset without increasing the hardware cost. The motor speed calculates the number of pole pairs of the target motor, so as to realize the identification of the target motor model according to the number of pole pairs. On the basis of ensuring the reliability and accuracy of the identification result, the identification cost and resource occupation are reduced.

The additional aspects and advantages of this application will be partly given in the following description, and some will become obvious from the following description, or be understood through the practice of this application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

Fig. 1 is a flowchart of a method for detecting the number of pole pairs of a motor according to an embodiment of the present application;

Fig. 2 is a flowchart of a method for detecting the number of pole pairs of a motor according to an example of the present application;

Fig. 3 is a flowchart of a method for detecting the number of pole pairs of a motor according to another example of the present application;

Fig. 4 is a structural block diagram of a motor pole pair detection device according to an embodiment of the present application.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, but should not be understood as a limitation to the present application.

The following describes the motor pole pair detection method, the detection device, and the motor controller according to the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a flowchart of a method for detecting the number of pole pairs of a motor according to an embodiment of the present application.

As shown in Figure 1, the method includes the following steps:

S101: Obtain the reference load capacity of the reference motor.

In one embodiment, obtaining the reference load capacity of the reference motor includes: calculating the reference load capacity according to the parameters of the reference motor and the preset motor speed, or obtaining the reference load capacity stored in the memory.

Among them, the parameters of the reference motor may include phase winding resistance R _s3 , pole pair number p ₃ , direct axis inductance L _d3 , quadrature axis inductance L _q3 , motor flux ψ _f3 , and moment of inertia J _m3 . The preset motor speed n _ref is any speed value determined according to the parameters of the reference motor and within the normal operating speed range of the reference motor.

In addition, the reference load capacity can be the reference electromagnetic torque T _eref of the reference motor, or the reference output power P _eref of the reference motor.

Specifically, the parameters of the reference motor and the preset motor speed can be corresponding. Therefore, the reference load capacity basis can be calculated according to the parameters of the reference motor and the preset motor speed; the parameters of the reference motor can also be calculated in advance And the table between the preset motor speed and the corresponding reference load capacity, and store it in the memory, so that it can be obtained from the memory every time it is applied.

In terms of calculating the reference load capacity, if the reference load capacity is the reference electromagnetic torque, after determining the parameters of the reference motor and the preset motor speed, you can follow the formula:

T _eref = p ₃ ((L _d3 -L _q3 )i _d3 i _q3 +ψ _f3 i _q3 ) (1)

_{The reference electromagnetic torque T eref} of the reference motor is calculated.

Or, if the reference load capacity is the reference output power, it can be based on formula (1) and formula

The reference output power P _{eref is calculated} .

The calculated reference electromagnetic torque T _eref or the reference output power P _{eref can be} stored in the memory for subsequent recall.

S102: Control the target motor to run at a preset motor speed, and obtain the current actual load capacity of the target motor.

Among them, the target motor refers to the motor of the type to be tested, which is loaded in the household electrical appliance, and may be a permanent magnet synchronous motor. The actual load capacity can be the actual electromagnetic torque or the actual output power.

Specifically, if the reference electromagnetic torque T _eref _{calculated in the above step S101 is obtained, then the actual electromagnetic torque T eact of the} target motor is obtained in this step S102; if the reference output power P is calculated in the above step S101 _eref _{, the actual output power P eact of the} target motor is obtained in step S102.

Specifically, the motor controller can be controlled to operate in the dual closed-loop mode of speed outer loop and current inner loop. The control parameters of the controller are set according to the parameters of the reference motor, that is, the parameters of the reference motor are used in the control system of the target motor, and The target motor is controlled to run stably at the preset motor speed n _ref. The three-phase current of the target motor and the actual speed n _{act of the} target motor are collected during operation, so as to calculate the current actual electromagnetic torque T _eact or the actual output power P _eact of the target motor according to the three-phase current and the actual speed n _act .

S103: Calculate the number of pole pairs of the target motor according to the actual load capacity, the reference load capacity, and the parameters of the reference motor.

Specifically, the proportional relationship between the actual load capacity and its corresponding reference load capacity can be calculated first, and then the number of pole pairs of the target motor can be calculated according to the proportional relationship and the parameters of the reference motor.

Specifically, when the load of the target motor is an air conditioner fan or a pump, the load torque of the target motor is linearly related to the mechanical speed, and the quadrature axis current is linearly related to the mechanical speed. The mechanical speed of the target motor is linearly related to the number of pole pairs. Therefore, the actual electromagnetic torque of the target motor is related to the number of pole pairs, and its actual output power is also related to the number of pole pairs. Therefore, the ratio between the actual electromagnetic torque T _eact and the reference electromagnetic torque T _eref can be calculated, and then the number of pole pairs of the target motor can be calculated based on the ratio and the parameters of the reference motor; or, the actual output power P _eact and the reference output can be calculated The ratio between the power P _eref , and then calculate the number of pole pairs of the target motor based on the ratio and the parameters of the reference motor.

It should be noted that, generally speaking, different types of motors provided by different motor suppliers have similar electrical parameters (including resistance, inductance, and back-EMF coefficient) and relatively different mechanical parameters (number of pole pairs and moment of inertia). Therefore, the embodiment of the present application detects the number of pole pairs of the target motor, and can accurately obtain the model of the target motor according to the detected number of pole pairs, and it is not limited in practical applications and is easy to implement.

Compared with the identification resistance scheme in the related art, the motor pole pair detection method of the embodiment of the present application does not require additional resistance devices and resistance measurement circuits. Without increasing the hardware cost, the detection method of the target motor The number of pole pairs realizes the identification of the target motor model, which has the advantages of lower implementation cost, less resource occupation, and easy implementation.

Therefore, the motor pole pair detection method does not increase the hardware cost, and calculates the target motor's pole pair number by using the reference motor's reference load capacity and the preset motor speed, so as to achieve the target based on the pole pair number. The identification of the motor model reduces the cost and resource occupation on the basis of ensuring the reliability and accuracy of the identification result.

In an embodiment of the present application, before calculating the reference load capacity according to the parameters of the reference motor and the preset motor speed, that is, before the above step S101 is implemented, the method may further include: according to preset rules, according to each candidate motor's Parameters, determine the parameters of the reference motor.

Among them, candidate motors may include: different types of motors provided by multiple motor manufacturers for air-conditioning fans or pumps, and different models that can be applied to air-conditioning fans or pumps set by home appliance manufacturers when they leave the factory. Motors, air-conditioning fans or pumps of different types used in historical operation. It can be understood that different types of candidate motors correspond to different control methods. The parameters of each candidate motor may include motor phase winding resistance R _s , direct axis inductance L _d , quadrature axis inductance L _q , motor flux linkage ψ _f , moment of inertia J _m and motor pole pair number p. The parameter array matrix formula of each candidate motor:

C=(R _s ,L _d ,L _q ,ψ _f ,J _m ,p) ^T (3)

Among them, T represents the transpose of the matrix (R _s , L _d , L _q , ψ _f , J _m , p).

In an example, determining the parameters of the reference motor according to the parameters of each candidate motor according to a preset rule may include: determining the parameters of the reference motor according to the respective weight value of each candidate motor and the parameters of each candidate motor.

Specifically, the parameters of each candidate motor all contribute to the corresponding parameter of the reference motor. The sum of all contributions is the corresponding parameter of the reference motor, and the degree of contribution is expressed by the weight value, where the weight value corresponding to each candidate motor is Refers to the relative importance of the parameters of the candidate motor relative to the parameters of other candidate motors in the corresponding parameters of the reference motor. Therefore, for each parameter of the reference motor, the method of determining the parameters of the reference motor may include: calculating the product of the parameter of each candidate motor and the weight value corresponding to the candidate motor to obtain multiple product results; The sum of the product results can get the corresponding parameters of the reference motor.

In this embodiment, there may be two candidate motors: 1# candidate motor and 2# candidate motor. The parameter array matrix of 1# candidate motor is the formula:

C ₁ =(R _s1 ,L _d1 ,L _q1 ,ψ _f1 ,J _m1 ,p ₁ ) ^T (4)

2#The parameter array matrix of the candidate motor is the formula:

C ₂ =(R _s2 ,L _d2 ,L _q2 ,ψ _f2 ,J _m2 ,p ₂ ) ^T (5)

Then the parameter array matrix of the reference motor is the formula:

C ₃ =λ ₁ C ₁ +λ ₂ C ₂ (6)

Among them, λ ₁ and λ ₂ are the corresponding weight values of 1# candidate motor and 2# candidate motor, and λ ₁ +λ ₂ =1, the expressions of _{λ 1} and λ _{2 are:}

In other words, the reference motor pole pair number p ₃ , phase winding resistance R _s3 , direct axis inductance L _d3 , quadrature axis inductance L _q3 , motor flux ψ _f3 , and moment of inertia J _m3 can be calculated according to the following formula:

p=λ _1p *p ₁ +λ _2p *p ₂ (9)

In an example, determining the parameters of the reference motor according to the parameters of each candidate motor according to a preset rule may include: determining the number of pole pairs of the reference motor according to the number of pole pairs of any one of the candidate motors; and, The non-pole pair parameters of the reference motor are determined according to the non-pole pair number parameter among the parameters of each candidate motor and the weight value corresponding to each candidate motor.

Specifically, in terms of the number of pole pairs of the reference motor, the number of pole pairs of the reference electrode is determined according to the number of pole pairs of any one of the candidate motors, that is to say, the number of pole pairs of the reference motor is completely determined by any of the candidate motors. The contribution of the number of pole pairs of a motor makes the number of pole pairs of the reference motor equal to the number of pole pairs of any motor; as for the number of non-pole pairs of the reference electrode (parameters other than the number of pole pairs), it is based on the non-pole pairs of each candidate motor. The product of the logarithmic parameter and the weight value corresponding to each candidate motor is determined.

Specifically, when there are two candidate motors: 1# candidate motor and 2# candidate motor, the parameters of the reference motor can be determined in the following two ways: (1) Let λ _1p =1 and λ _2p =0, then According to formula (9), p ₃ = p ₁ , that is, the number of pole pairs of the reference motor p ₃ is equal to the number of pole pairs of 1# candidate motor p ₁ ;

That is to say, the contribution of 1# candidate motor and 2# candidate motor to the non-pole pair parameters of the reference motor is the same. According to formulas (10)-(14), the phase winding resistance R _s3 and the direct axis of the reference motor can be obtained. The inductance L _d3 , the quadrature axis inductance L _q3 , the motor flux ψ _f3 , and the moment of inertia J _m3 are respectively: R _s3 =0.5*R _s1 +0.5*R _s2 , L _d3 =0.5*L _d1 +0.5*L _d2 , L _q3 ＝0.5*L _q1 +0.5*L _q2 , ψ _f3 ＝0.5*ψ _f1 +0.5*ψ _f2 , J _m3 ＝0.5*J _m1 +0.5*J _m2 , where the parameters of the two candidate motors are known , Which can calculate the non-pole pair parameters of the reference motor based on the parameters of the two candidate motors.

(2) Let λ _1p =0 and λ _2p =1, then according to formula (9) we can get p ₃ =p ₂ , that is, the number of pole pairs of the reference electrode p ₃ is equal to the number of pole pairs of 2# candidate motor p ₂ ;

In another example, determining the parameters of the reference motor according to the parameters of each candidate motor according to the preset rules may include: determining the parameters of the reference motor according to the parameters of any one of the candidate motors.

Specifically, the parameters of the reference motor are determined according to the parameters of any one of the candidate motors, that is to say, the parameters of the reference motor (including the number of pole pairs and non-pole pair parameters) are completely determined by the parameters of any one of the candidate motors. Parameter (including pole pair number and non-pole pair number parameters) contribution, that is, the parameter of the reference electrode is equal to the corresponding parameter of any candidate motor.

Specifically, when there are two candidate motors: 1# candidate motor and 2# candidate motor, there are also two ways to determine the parameters of the reference motor: (1) Let

Then the parameters of the 1# candidate motor are equal to the parameters of the reference electrode, that is, the number of pole pairs p ₃ , phase winding resistance R _s3 , direct axis inductance L _d3 , quadrature axis inductance L of the reference motor can be obtained according to formulas (9)-(14) _q3 , motor flux ψ _f3 , and moment of inertia J _m3 are: p ₃ ＝p ₁ , R _s3 ＝R _s1 , L _d3 ＝L _d1 , L _q3 ＝L _q1 , ψ _f3 ＝ψ _f1 , J _m3 ＝J _m1 , Among them, the parameters of the 1# candidate motor are known, so the parameters of the reference motor can be obtained according to the parameters of the 1# candidate motor.

(2) Order

Then the parameters of the 2# candidate motor are equal to the parameters of the reference motor. According to formulas (9)-(14), the number of pole pairs p ₃ , phase winding resistance R _s3 , direct axis inductance L _d3 , and quadrature axis inductance L of the reference motor can be obtained. _q3 , motor flux ψ _f3 , and moment of inertia J _m3 are respectively: p ₃ ＝p ₂ , R _s3 ＝R _s2 , L _d3 ＝L _d2 , L _q3 ＝L _q2 , ψ _f3 ＝ψ _f2 , J _m3 ＝J _m2 Among them, the parameters of the 2# candidate motor are known, so the parameters of the reference motor can be obtained according to the parameters of the 2# candidate motor.

Further, before determining the parameter of the reference motor according to the parameter of any one of the candidate motors, the method further includes: determining that the difference value between the parameters of each candidate motor is less than a threshold.

Wherein, the threshold may be a change value that can be tolerated by the parameters of each candidate motor, and tolerable refers to ensuring that the target motor can be reliably started or operated.

Specifically, before determining the parameters of the reference motor according to the parameters of any one of the candidate motors, it can be judged whether the difference between the parameters of the candidate motors is less than the threshold. If so, that is, the difference between the parameters of the candidate motors is smaller If it is smaller, the parameter of any one of the candidate motors is equal to the corresponding parameter of the reference motor; if not, that is, the difference between the parameters of the candidate motors is large, the parameter of the reference motor is determined according to the parameters of each candidate motor.

That is to say, in this example, the parameter of any one of the candidate motors is equal to the corresponding parameter of the reference motor, which is implemented based on the small difference between the parameters of the candidate motors. In this case, When the target motor is driven according to the parameters of any motor, the target motor can start or run normally, so as to avoid the phenomenon that the target motor cannot be reliably started or run due to the large difference between the parameters of each candidate motor.

As a result, the parameters of the reference motor are determined according to the respective weight values of the candidate motors and the parameters of the candidate motors, which ensures the reliability of obtaining the parameters of the reference motor, and further ensures the normal startup or operation of the target motor.

In an example of this application, the reference load capacity is any one of the reference electromagnetic torque and the reference output power, and the actual load capacity is the actual electromagnetic torque corresponding to the reference load capacity, or the actual output corresponding to the reference load capacity. power.

Specifically, when the reference load capacity is the reference electromagnetic torque T _eref and the actual load capacity is the actual electromagnetic torque T _eact , according to the actual electromagnetic torque T _eact , the reference electromagnetic torque T _eref and the pole pair of the reference motor Calculate the number of pole pairs p _{act of the} target motor; when the reference load capacity is the reference output power P _eref and the actual load capacity is the actual output power P _eact , according to the actual output power P _eact , the reference output power P _eref and the reference motor Calculate the number of pole pairs p _{act of the} target motor.

Among them, when calculating the target motor pole pair number p _act , adopt _{the control method of i d} =0, then according to the formula:

T _e = p((L _d -L _q )i _d i _q +ψ _f i _q ) (15)

It can be drawn electromagnetic torque T _e is proportional to the product of the number of pole pairs p of the quadrature axis current i _q. In this example, if the load of the target motor is an air conditioner fan or pump, the load torque of the target motor (when the target motor is running stably, the load torque is equal to the electromagnetic torque) is positively correlated with the mechanical speed, and the quadrature axis current is proportional to The mechanical speed of the target motor. According to the formula:

n=60F/p (16)

Among them, F is the frequency and p is the number of pole pairs. It can be concluded that the load torque of the target motor is approximately proportional to the square of the number of pole pairs. Correspondingly, according to the formula:

It can be concluded that the mechanical power is proportional to the third power of the number of pole pairs. Therefore, in this example, when a constant speed command is given, the relationship between the actual speed of the motor and the given speed is the formula:

Among them, n _ref is the preset motor speed, P ₃ is the number of pole pairs of the reference motor, n _act is the actual operating speed _{of the target motor, and p act} is the number of pole pairs of the target motor.

Therefore, in the case of calculating the reference electromagnetic torque T _eref , the actual electromagnetic torque T _eact , and the number of pole pairs P ₃ of the reference motor, the formula can be:

Calculate the number of pole pairs P _act of the target motor; or, when the reference output power P _eref , the actual output power P _eact , and the number of pole pairs P ₃ of the reference motor are calculated, the formula can be:

Calculate the number of pole pairs P _act of the target motor.

Therefore, for a target motor whose load is an air conditioner fan or pump, the number of pole pairs of the target motor can be calculated according to the reference electromagnetic torque, actual electromagnetic torque, and reference pole pairs; or, according to the reference output power, actual output power, Calculate the number of pole pairs of the target motor with reference to the number of pole pairs.

In an example of the present application, after calculating the number of pole pairs of the target motor, it further includes: determining the model of the target motor according to the number of pole pairs of the target motor; and determining the target control mode according to the model of the target motor.

Specifically, after calculating the number of pole pairs of the target motor, the model of the target motor can be determined according to the number of pole pairs. Generally speaking, different types of motors have very different pole pairs, so according to the pole pairs of the target motor The number can accurately determine the model of the target motor, and then determine the corresponding target control mode according to the model of the target motor, so as to control the startup or operation of the target motor through the target control mode, so that the air conditioner fan or pump can operate normally.

It should be noted that the models of different types of motors that can be applied to air-conditioning fans or pumps and their corresponding control methods can be stored in the memory, so that after the model of the target motor is determined, the memory corresponding to the model can be called Or, store the number of pole pairs of different types of motors that can be applied to air-conditioning fans or pumps and their corresponding control methods in the memory, so as to directly call after the number of pole pairs of the target motor is determined The target control mode corresponding to the pole pair number in the memory.

Based on the above example, in an example, as shown in FIG. 2, the method for detecting the number of motor pole pairs may include the following steps:

S201: Determine the parameter of the reference motor according to the weight value corresponding to each candidate motor and the parameter of each candidate motor.

S202: Determine the reference electromagnetic torque T _eref according to the parameters of the reference motor.

S203: Control the operation of the target motor at a preset motor speed n _ref , and obtain the current actual electromagnetic torque T _{eact of the} target motor.

S204: Calculate the pole pair number p _{act of the} target motor based on the actual electromagnetic torque T _eact , the reference electromagnetic torque T _eref and the pole pair number P _{3 of the} reference motor.

S205: Determine the model of the target motor according to the number of pole pairs p _{act of the target motor.}

S206: Determine a control mode of the target motor according to the model of the target motor.

In another example, as shown in FIG. 3, the method for detecting the number of motor pole pairs may include the following steps:

S301: Determine the parameter of the reference motor according to the weight value corresponding to each candidate motor and the parameter of each candidate motor.

S302: Determine the reference output power P _eref according to the parameters of the reference motor and the preset motor speed n _ref .

S303: Control the operation of the target motor at a preset motor speed n _ref , and obtain the current actual output power P _{eact of the} target motor.

S304: Calculate the pole pair number p _{act of the} target motor according to the actual output power P _eact , the reference output power P _eref and the pole pair number P _{3 of the} reference motor.

S305: Determine the model of the target motor according to the number of pole pairs p _{act of the target motor.}

S306: Determine a control mode of the target motor according to the model of the target motor.

In summary, this method calculates the number of pole pairs of the target motor by using the parameters of the reference motor and the preset motor speed without increasing the hardware cost, so as to realize the identification of the target motor model based on the number of pole pairs. On the basis of ensuring that the recognition result is reliable and accurate, the cost of recognition and the occupation of resources are reduced.

In order to implement the above-mentioned embodiments, this application also proposes a motor pole pair detection device. Fig. 4 is a structural block diagram of a motor pole pair detection device according to an embodiment of the present application.

As shown in FIG. 4, the motor pole pair detection device 10 includes an acquisition module 11, a control module 12 and a calculation module 13.

Among them, the obtaining module 11 is used to obtain the reference load capacity of the reference motor; and, used to obtain the current actual load capacity of the target motor; the control module 12 is used to control the operation of the target motor at a preset motor speed; the calculation module 13 uses To calculate the number of pole pairs of the target motor based on the actual load capacity, the reference load capacity, and the parameters of the reference motor.

Specifically, in practical applications, first obtain the reference load capacity of the reference motor through the acquisition module 11; then use the control module 12 to control the operation of the target motor at a preset motor speed, and obtain the current actual belt load capacity of the target motor through the acquisition module 11. Load capacity; Finally, the calculation module 13 calculates the number of pole pairs of the target motor according to the actual load capacity, the reference load capacity, and the parameters of the reference motor.

In an embodiment of the present application, the control module 12 may also be used to: determine the model of the target motor according to the number of pole pairs of the target motor; and determine the target control mode according to the model of the target motor.

Specifically, after the calculation module 13 calculates the number of pole pairs of the target motor, the control module 12 can determine the model of the target motor according to the number of pole pairs. Generally speaking, motors of different models have very different numbers of pole pairs, so According to the number of pole pairs of the target motor, the model of the target motor can be accurately determined. After that, the control module 12 determines the corresponding target control mode according to the model of the target motor, so as to control the start or operation of the target motor through the target control mode, so as to make the air conditioner fan or pump The class is operating normally.

It should be noted that the foregoing explanation of the embodiment of the motor pole pair detection method is also applicable to the motor pole pair detection device of this embodiment, and will not be repeated here.

The motor pole pair detection device of the embodiment of the present application calculates the pole pair number of the target motor by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost, so as to realize the realization based on the pole pair number The identification of the target motor model reduces the cost and resource occupation on the basis of ensuring the reliability and accuracy of the identification result.

Further, the present application also proposes a motor controller, including: at least one processor and a memory connected in communication with the at least one processor.

The memory stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor, so that the at least one processor can execute the motor pole pair detection method in the foregoing embodiment of the present application.

The motor controller, when the instructions stored in the memory are executed by at least one processor, can calculate the pole pair of the target motor by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost. Therefore, the identification of the target motor model is realized according to the number of pole pairs, and the identification cost and resource occupation are reduced on the basis of ensuring the reliability and accuracy of the identification result.

In order to implement the foregoing embodiment, the present application also proposes a readable storage medium on which a motor pole pair detection program is stored. When the program is executed by a processor, the motor pole pair detection method of the foregoing embodiment is implemented.

The readable storage medium, when the motor pole pair detection program stored on it is executed by the processor, can calculate the target by using the reference load capacity of the reference motor and the preset motor speed without increasing the hardware cost. The number of pole pairs of the motor, so as to realize the identification of the target motor model according to the number of pole pairs. On the basis of ensuring the reliability and accuracy of the identification result, the identification cost and resource occupation are reduced.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless specifically defined otherwise.

Any process or method description described in the flowchart or described in other ways herein can be understood as a module, segment or part of code that includes one or more executable instructions for implementing custom logic functions or steps of the process , And the scope of the preferred embodiments of the present application includes additional implementations, which may not be in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. This should It is understood by those skilled in the art to which the embodiments of the present application belong.

The logic and/or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logic functions, and can be embodied in any computer-readable medium, For use by instruction execution systems, devices, or equipment (such as computer-based systems, systems including processors, or other systems that can fetch and execute instructions from instruction execution systems, devices, or equipment), or combine these instruction execution systems, devices Or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, device, or device or in combination with these instruction execution systems, devices, or devices. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connections (electronic devices) with one or more wiring, portable computer disk cases (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable and editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because it can be done, for example, by optically scanning the paper or other media, and then editing, interpreting, or other suitable media if necessary. The program is processed in a manner to obtain the program electronically, and then stored in the computer memory.

It should be understood that each part of this application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented by hardware as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: Discrete logic gate circuits with logic functions for data signals Logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried in the method of the foregoing embodiments can be implemented by a program instructing relevant hardware to complete. The program can be stored in a computer-readable storage medium. When executed, it includes one of the steps of the method embodiment or a combination thereof.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

The aforementioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions, and modifications.

Claims

A method for detecting the number of pole pairs of a motor is characterized in that it comprises:

Obtain the reference load capacity of the reference motor;

Controlling the operation of the target motor at the preset motor speed to obtain the current actual load capacity of the target motor; and,

Calculate the number of pole pairs of the target motor according to the actual load capacity, the reference load capacity, and the parameters of the reference motor.
The method according to claim 1, wherein said obtaining the reference load capacity of the reference motor comprises:

According to the parameters of the reference motor and the preset motor speed, the reference load capacity is calculated, or the reference load capacity stored in the memory is obtained.
The method according to claim 2, characterized in that, before calculating the reference load capacity according to the parameters of the reference motor and the preset motor speed, the method further comprises:

According to preset rules, the parameters of the reference motor are determined according to the parameters of each candidate motor.
The method according to claim 3, wherein the determining the parameters of the reference motor according to the parameters of each candidate motor according to a preset rule comprises:

Determining the number of pole pairs of the reference motor according to the number of pole pairs of any one of the candidate motors; and,

The non-pole pair parameter of the reference motor is determined according to the non-pole pair parameter in the parameters of the candidate motors and the weight value corresponding to each candidate motor.
The method according to claim 3, wherein the determining the parameters of the reference motor according to the parameters of each candidate motor according to a preset rule comprises:

Determine the parameter of the reference motor according to the parameter of any one of the candidate motors.
The method according to claim 5, wherein before the determining the parameter of the reference motor according to the parameter of any one of the candidate motors, the method further comprises:

It is determined that the difference value between the parameters of the candidate motors is smaller than the threshold value.
The method according to any one of claims 2-6, wherein the determining the parameter of the reference motor according to the parameters of each candidate motor according to a preset rule comprises:

The parameter of the reference motor is determined according to the weight value corresponding to each candidate motor and the parameter of each candidate motor.
The method according to any one of claims 1-6, wherein the reference load capacity is any one of a reference electromagnetic torque and a reference output power, and the actual load capacity is the same as the reference load capacity. The actual electromagnetic torque corresponding to the capacity, or the corresponding actual output power.
8. The method according to any one of claims 1 to 6, characterized in that, after said calculating the number of pole pairs of the target motor, the method further comprises:

Determine the model of the target motor according to the number of pole pairs of the target motor; and,

According to the model of the target motor, the target control mode is determined.
A device for detecting the number of pole pairs of a motor is characterized in that it comprises:

The acquisition module is used to obtain the reference load capacity of the reference motor; and, used to obtain the current actual load capacity of the target motor;

The control module is used to control the operation of the target motor at the preset motor speed;

The calculation module is used to calculate the number of pole pairs of the target motor according to the actual load capacity, the reference load capacity, and the parameters of the reference motor.
The device according to claim 10, wherein the control module is further used for:

Determine the model of the target motor according to the number of pole pairs of the target motor; and,

According to the model of the target motor, the target control mode is determined.
A motor controller is characterized in that it comprises:

At least one processor; and

A memory connected in communication with the at least one processor;

Wherein, the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute any one of claims 1-9. The motor pole pair detection method described in the item.
A readable storage medium, characterized in that a motor pole pair detection program is stored thereon, and when the program is executed by a processor, the motor pole pair detection method according to any one of claims 1-9 is realized.