CN118050637A - Permanent magnet motor detection system, method and device, storage medium and electronic equipment - Google Patents
Permanent magnet motor detection system, method and device, storage medium and electronic equipment Download PDFInfo
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Abstract
The invention discloses a permanent magnet motor detection system, a permanent magnet motor detection method, a permanent magnet motor detection device, a permanent magnet motor detection storage medium and electronic equipment. Wherein, this system includes: the permanent magnet motor comprises a plurality of winding branches, wherein the winding branches are mutually independent; the electric controller is connected with a first winding branch of the plurality of winding branches and is used for supplying power to the first winding branch so as to control the permanent magnet motor to run; the detection device is connected with a second winding branch of the plurality of winding branches and is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch of the plurality of winding branches. The invention solves the technical problem of overhigh acquisition cost of the back electromotive force of the permanent magnet motor.
Description
Technical Field
The invention relates to the field of motors, in particular to a permanent magnet motor detection system, a permanent magnet motor detection method, a permanent magnet motor detection device, a permanent magnet motor storage medium and electronic equipment.
Background
The back electromotive force of the permanent magnet motor is an important reference parameter when the permanent magnet motor operates, the performance and the working state of the motor can be known through the back electromotive force of the permanent magnet motor, the operation condition of the motor can be monitored in real time, and the motor can be controlled and regulated.
The related art uses a opposite-dragging test method to obtain the back electromotive force of the permanent magnet motor, namely, uses a test accompanying motor to drag the tested motor to rotate so as to obtain the no-load back electromotive force data of the tested motor. However, the implementation of the method needs to provide an additional test machine, a coupling device and a centering connection procedure, and the implementation of the centering connection procedure is difficult, and takes a long time for manpower or uses expensive high-precision professional centering equipment to realize centering. Therefore, the operation difficulty of acquiring the counter potential data by the large-machine seat number or the vertical permanent magnet motor is high.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a permanent magnet motor detection system, a method, a device, a storage medium and electronic equipment, which are used for at least solving the technical problem of overhigh acquisition cost of counter electromotive force of a permanent magnet motor.
According to an aspect of an embodiment of the present invention, there is provided a permanent magnet motor detection system including: the permanent magnet motor comprises a plurality of winding branches, wherein the winding branches are mutually independent; the electric controller is connected with a first winding branch of the plurality of winding branches and is used for supplying power to the first winding branch so as to control the permanent magnet motor to run; the detection device is connected with a second winding branch of the plurality of winding branches and is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch of the plurality of winding branches.
Optionally, the detection device includes: the detection end of the sensor is connected with the second winding branch and is used for detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor; and the processor is connected with the output end of the sensor and is used for determining the no-load counter electromotive force according to the initial no-load counter electromotive force of at least one sub-winding branch.
Optionally, the sensor comprises at least one of: oscilloscopes, power analyzers, voltage sensors.
According to another aspect of the embodiment of the present invention, there is provided a method for detecting a permanent magnet motor, including: in response to receiving an idle counter electromotive force detection instruction of the permanent magnet motor, supplying power to a first winding branch of the permanent magnet motor by an electric controller in a permanent magnet motor detection system to control the permanent magnet motor to operate, wherein the permanent magnet motor comprises a plurality of winding branches which are mutually independent, and the permanent magnet motor detection system is the permanent magnet motor detection system; during operation of the permanent magnet motor, an idling back electromotive force of the permanent magnet motor is determined based on the second winding branch.
Optionally, during operation of the permanent magnet motor, determining an idling back electromotive force of the permanent magnet motor based on the second winding branch includes: detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor; the no-load back emf is determined based on the initial no-load back emf of at least one sub-winding leg.
Optionally, the second winding leg includes a sub-winding leg, the determining the no-load back emf based on an initial no-load back emf of at least one of the sub-winding legs, comprising: the initial no-load back emf of the sub-winding leg is determined to be no-load back emf.
Optionally, the second winding leg includes a plurality of sub-winding legs, the determining the no-load back emf based on an initial no-load back emf of at least one of the sub-winding legs, comprising: an average value of initial no-load back emf of the plurality of sub-winding legs is determined as no-load back emf.
According to another aspect of the embodiment of the present invention, there is provided a detection apparatus for a permanent magnet motor, including: the power supply module is used for responding to the no-load counter electromotive force detection instruction of the permanent magnet motor, and supplying power to the first winding branch of the permanent magnet motor by using an electric controller in the permanent magnet motor detection system so as to control the permanent magnet motor to run, wherein the permanent magnet motor comprises a plurality of winding branches, the winding branches are mutually independent, and the permanent magnet motor detection system is the permanent magnet motor detection system; and the determining module is used for determining the no-load counter electromotive force of the permanent magnet motor based on a second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch in the plurality of winding branches.
According to another aspect of the embodiment of the present invention, there is also provided an electronic device, including: a memory storing an executable program; and the processor is used for running a program, wherein the permanent magnet motor detection method in each embodiment of the invention is executed when the program runs.
According to another aspect of the embodiments of the present invention, there is further provided a computer readable storage medium, where the computer readable storage medium includes a stored executable program, and when the executable program runs, the device on which the computer readable storage medium is controlled to execute the permanent magnet motor detection method in each embodiment of the present invention.
According to another aspect of embodiments of the present invention, there is also provided a computer program product comprising a computer program which, when executed by a processor, implements the method for detecting a permanent magnet motor according to the embodiments of the present invention.
According to another aspect of embodiments of the present invention, there is also provided a computer program product comprising a non-volatile computer readable storage medium storing a computer program which, when executed by a processor, implements the permanent magnet motor detection method in various embodiments of the present invention.
According to another aspect of the embodiments of the present invention, there is also provided a computer program, which when executed by a processor, implements the permanent magnet motor detection method in the various embodiments of the present invention.
In an embodiment of the present invention, a permanent magnet motor detection system includes: the permanent magnet motor comprises a plurality of winding branches, wherein the winding branches are mutually independent; the electric controller is connected with a first winding branch of the plurality of winding branches and is used for supplying power to the first winding branch so as to control the permanent magnet motor to run; the detection device is connected with a second winding branch of the plurality of winding branches and is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch of the plurality of winding branches. It is easy to notice that through designing permanent magnet motor winding branch road, use the electronic controller to supply power to specific winding branch road, use detection equipment to detect the no-load back electromotive force of specific winding branch road, can simplify the system that acquires permanent magnet motor back electromotive force to realized reducing the technical effect of permanent magnet motor's back electromotive force acquisition cost, and then solved the technical problem that permanent magnet motor's back electromotive force acquisition cost is too high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a permanent magnet motor detection system according to an embodiment of the present invention;
Fig. 2 is a flowchart of a method of detecting a permanent magnet motor according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a detection device of a permanent magnet motor according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the invention, an embodiment of a permanent magnet motor detection system is provided.
Fig. 1 is a schematic diagram of a permanent magnet motor detection system according to an embodiment of the present invention, as shown in fig. 1, the system including:
Permanent magnet motor 10 includes a plurality of winding branches (e.g., 16 and 18 in fig. 1), wherein the winding branches are independent of each other.
The permanent magnet motor is a motor for generating a magnetic field by using permanent magnet materials, and is generally composed of a permanent magnet and an electromagnetic coil, and the direction and the magnitude of the magnetic field are changed by controlling current, so that the operation of the motor is realized. The winding branch refers to a coil connection mode in the motor, including but not limited to a stator winding branch, which is a motor coil mounted on a motor stator for rotating a motor rotor and generating a magnetic field, and the stator winding branch refers to a branch provided in a stator winding of a permanent magnet motor. The permanent magnet motor comprises a plurality of mutually independent winding branches, namely, the winding of the permanent magnet motor is designed into a plurality of submodules, and each submodule is singly connected with the controller to enable the permanent magnet motor to rotate.
In an alternative embodiment, the stator winding of the permanent magnet motor is designed to lead out a plurality of winding branches outwards, each winding branch is mutually independent and can realize torque output to an external electric control device, and each winding branch can have consistent phase and phase difference. One stator winding branch is externally connected with a controller to control the motor to rotate, and the other stator winding branches are in an open circuit state. The external controller of one stator winding branch circuit aims to ensure that the stator winding can acquire enough electric energy from an external power supply, so that the normal operation of the motor is ensured, and the motor is controlled to rotate through the external controller, so that the permanent magnet motor can operate in an idle state, and accurate data can be obtained when the idle counter electromotive force is measured. The purpose of keeping the other stator winding branches in the open circuit state is to avoid the influence of the energization of the other stator winding branches on the measurement result, so as to reduce the interference of external factors on the measurement effect.
And an electrical controller 12 connected to a first winding branch 16 of the plurality of winding branches for supplying power to the first winding branch to control operation of the permanent magnet motor.
The electric controller is used for supplying power to the permanent magnet motor, and the rotating speed and the torque of the permanent magnet motor are regulated by controlling the current and the voltage, so that accurate control of the motor is realized, and the electric controller generally comprises a power supply module, a control circuit, a protection circuit and the like. The first winding branch is a winding branch which can be independently connected with the electric controller in a plurality of winding branches, and the number of the first winding branch can be single. Because each winding branch is mutually independent and can realize torque output to an external electric control device, the first winding branch can be independently connected with an electric controller, so that the electric controller supplies power to the first winding branch to control the operation of the permanent magnet motor.
In an alternative embodiment, one winding branch is determined from a plurality of winding branches of the permanent magnet motor, as a first winding branch, and the electronic controller may be connected to the first winding branch via a terminal plate. The wires of the first winding branch are connected to the connecting terminals of the terminal board, and the wires are fixed on the terminal board by using a screwdriver or a wrench, so that firm and reliable connection is ensured. And after ensuring that all the connections are correct, connecting the terminal board to the corresponding interface of the electric controller. After connection is completed, testing and inspection are performed to ensure that the permanent magnet motor can supply power for the first winding branch and ensure the operation of the permanent magnet motor.
In another alternative embodiment, one winding branch is determined from a plurality of winding branches of the permanent magnet motor as a first winding branch, and then the electrical controller and the first winding branch are connected using a connector. The plug portion of the connector is connected to the first winding leg of the permanent magnet motor and the socket portion is connected to the electronic controller. Through the connection mode, the electric controller can establish electrical connection with the first winding branch of the permanent magnet motor through the connector, so that power supply to the first winding branch is realized.
And the detection device 14 is connected with a second winding branch 18 of the plurality of winding branches and is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch of the plurality of winding branches.
The detection device is used for detecting no-load counter electromotive force of the winding branch, the second winding branch can be other winding branches except the first winding branch in a plurality of winding branches of the permanent magnet motor, the first winding branch is externally connected with an electric controller, and the second winding branch is in an open circuit state. Under the condition that the first winding branch is externally connected with an electric controller and the second winding branch is in an open circuit state, the permanent magnet motor does not bear extra load, only needs to overcome the friction force and wind resistance of the permanent magnet motor and overcome the torque generated by the inertia of the permanent magnet motor, and can be regarded as being in an idle state. The no-load counter electromotive force is an electromotive force generated by rotation of the rotor when the permanent magnet motor is in a no-load state, and is an induced electromotive force generated by a change in a magnetic field. In the idle state, the back emf of the permanent magnet motor is usually the greatest, since the rotor speed is the highest and the magnetic field variation is the greatest.
In an alternative embodiment, the second winding branch is first determined from a plurality of winding branches. The second winding branch is not connected with the electric controller and is in an open circuit state. And then connecting the detection equipment to a second winding branch, acquiring the rotor angular speed and magnetic flux of the permanent magnet motor in an idle state, and calculating the idle counter electromotive force of the permanent magnet motor based on the rotor angular speed and the magnetic flux of the permanent magnet motor, wherein the calculation formula is as follows:
E＝K*Φ*ω；
Where E is the no-load back emf, K is a constant, Φ is the magnetic flux, ω is the rotor angular speed.
In another alternative embodiment, the second winding leg is first determined from a plurality of winding legs. The second winding branch is not connected with the electric controller and is in an open circuit state. And then connecting the detection equipment to the second winding branch, acquiring the input power and the output power of the permanent magnet motor in an idle state, and calculating the idle counter electromotive force of the permanent magnet motor based on the input power of the permanent magnet motor, the output power of the permanent magnet motor and the mechanical loss power of the permanent magnet motor by combining the mechanical loss power of the permanent magnet motor. The calculation formula is as follows:
E＝Pin-Pout-Ploss；
Where E is the no-load back emf, P in is the input power, P out is the output power, and P loss is the mechanical loss power.
The first winding branch is externally connected with the electric controller, the second winding branch is in an open circuit state, so that the permanent magnet motor is in an idle state, the stability of the rotating speed of the rotor of the permanent magnet motor is improved, interference of the second winding branch on idle counter electromotive force caused by electrifying is avoided, the accuracy of data detection of the detection equipment is improved, and the calculated idle counter electromotive force of the permanent magnet motor is more accurate.
In an embodiment of the present invention, a permanent magnet motor detection system includes: the permanent magnet motor comprises a plurality of winding branches, wherein the winding branches are mutually independent; the electric controller is connected with a first winding branch of the plurality of winding branches and is used for supplying power to the first winding branch so as to control the permanent magnet motor to run; the detection device is connected with a second winding branch of the plurality of winding branches and is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch of the plurality of winding branches. It is easy to notice that through designing permanent magnet motor winding branch road, use the electronic controller to supply power to specific winding branch road, use detection equipment to detect the no-load back electromotive force of specific winding branch road, can simplify the system that acquires permanent magnet motor back electromotive force to realized reducing the technical effect of permanent magnet motor's back electromotive force acquisition cost, and then solved the technical problem that permanent magnet motor's back electromotive force acquisition cost is too high.
Optionally, the detection device includes: the detection end of the sensor is connected with the second winding branch and is used for detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor; and the processor is connected with the output end of the sensor and is used for determining the no-load counter electromotive force according to the initial no-load counter electromotive force of at least one sub-winding branch.
The sensor may be a power analyzer, a wheel speed sensor, a tachometer, a hall effect sensor, a voltage sensor, an oscilloscope, etc., but is not limited thereto, and the specific sensor type may be determined according to actual conditions. The power analyzer may obtain the input power and the output power of the permanent magnet motor. The wheel speed sensor and the tachometer can be used for acquiring the rotating speed of the permanent magnet motor, the wheel speed sensor can be arranged on the rotor of the permanent magnet motor to acquire the rotating speed of the permanent magnet motor, and the tachometer can be connected to the shaft of the permanent magnet motor to acquire the rotating speed of the rotor of the permanent magnet motor. The hall effect sensor can be placed in the magnetic circuit of the permanent magnet motor, measures the magnetic field intensity, and can calculate the magnetic flux through the magnetic field intensity. The voltage sensor can be matched with an oscilloscope for use, the voltage sensor can be used for measuring the voltage of the permanent magnet motor, the oscilloscope is connected to the voltage sensor, the voltage waveform of the permanent magnet motor is obtained, and the voltage of the permanent magnet motor can be obtained through observing and analyzing the voltage waveform.
The sensor is connected with the second winding branch and can acquire related data for calculating no-load counter electromotive force. The processor is connected with the sensor and can be used for receiving the related data detected by the sensor and processing the related data to obtain no-load counter electromotive force. The sub-winding branch is a single winding branch of the second winding branch. The initial no-load counter electromotive force of the sub-winding branch is that when the first winding branch of the permanent magnet motor is connected with the electric controller and the second winding branch is in an open-circuit state, the initial no-load counter electromotive force of the sub-winding branch in the second winding branch can be used for determining the no-load counter electromotive force.
In an alternative embodiment, the sensor may be selected from a power analyzer. The power analyzer can be connected to at least one sub-winding branch in the second winding branch of the permanent magnet motor, the input current of at least one sub-winding branch in the second winding branch is measured through the built-in current sensor, the voltage of at least one sub-winding branch in the second winding branch is measured through the built-in voltage measuring circuit, then the power analyzer carries out operation based on the input current and the voltage of at least one sub-winding branch in the second winding branch, and the input power and the output power of at least one sub-winding branch in the second winding branch can be directly output. Meanwhile, the mechanical loss power of the permanent magnet motor can be estimated by a theoretical calculation method, for example, the bearing friction loss can be estimated according to the friction coefficient and the rotating speed of the bearing, the core loss can be estimated by the hysteresis loss and the eddy current loss of the core material of the permanent magnet motor, the windage loss can be estimated according to the windage coefficient and the running speed of the motor, and the like. And under the condition that the first winding branch is connected with the electric controller and the second winding branch is in an idle state in an open circuit state, the initial idle counter electromotive force of at least one sub-winding branch in the second winding branch can be calculated based on the input power and the output power of at least one sub-winding branch in the second winding branch and the mechanical loss power of the permanent magnet motor.
In an alternative embodiment, a hall effect sensor may be selected as the sensor. The hall effect sensor may be mounted on at least one sub-winding branch of the second winding branch of the permanent magnet motor, and when a magnetic field passes through the hall effect sensor, the hall effect sensor may detect changes in the magnetic field of at least one sub-winding branch of the second winding branch and convert the changes into voltage signals, the magnitude of the voltage signals being proportional to the strength of the magnetic field. The magnetic flux of at least one sub-winding of the second winding branch can be indirectly determined by measuring the magnitude of the voltage signals, and the angular speed of the rotor of the permanent magnet machine can be determined by evaluating these voltage signals. And under the condition that the first winding branch is connected with the electric controller and the second winding branch is in an idle state in an open circuit state, the initial idle back electromotive force of at least one sub-winding branch in the second winding branch can be calculated based on the magnetic flux of at least one sub-winding branch in the second winding branch and the rotor angular speed of the permanent magnet motor.
The processor processes the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch to determine the no-load counter electromotive force of the permanent magnet motor. The initial no-load counter electromotive force of a single sub-winding branch can be taken as the no-load counter electromotive force of the permanent magnet motor, and the initial no-load counter electromotive force average value of a plurality of sub-winding branches can be taken as the no-load counter electromotive force of the permanent magnet motor, but the method is not limited to the method.
Optionally, the sensor comprises at least one of: oscilloscopes, power analyzers, voltage sensors.
The oscilloscope is an instrument for observing the waveform of an electrical signal, and can display a waveform chart of voltage changing along with time, and is commonly used for measuring and analyzing various signals in a circuit. The power analyzer is an instrument for measuring power characteristics in an electric power system, and can measure parameters such as voltage, current, power factor, power and the like. A voltage sensor is a device for measuring a voltage in a circuit, and can convert the voltage in the circuit into an electrical signal and output the electrical signal to other devices for processing or display. The oscilloscope, the power analyzer and the voltage sensor can acquire related data for calculating the no-load back electromotive force.
In an alternative embodiment, a voltage sensor, an oscilloscope, a current sensor may be selected as the sensor. And (3) externally connecting the first winding branch with an electric controller, and keeping the second winding branch in an open-circuit state so that the permanent magnet motor is in an idle state. The voltage sensor is connected to at least one sub-winding branch in the second winding branch so as to measure a voltage signal generated when the permanent magnet motor rotates, so that connection accuracy is ensured, and the voltage measuring range of the voltage sensor can cover the output voltage range of the permanent magnet motor. An oscilloscope is connected to the output of the voltage sensor to record the waveform of the voltage signal. And then setting measurement parameters of the voltage sensor, including sampling rate, resolution, measurement range and the like, so as to ensure that the alternating-current voltage signal output by the permanent magnet motor can be accurately measured. And starting an electric controller connected with the first winding branch of the permanent magnet motor, observing and recording the output voltage waveform displayed on the oscilloscope, and thus obtaining the output voltage of at least one sub-winding branch in the second winding branch. Measuring the current value of at least one sub-winding branch in the second winding branch by using a current sensor, and then calculating to obtain the no-load initial counter electromotive force of at least one sub-winding branch in the second winding branch based on the output voltage, the current value and the internal resistance of the permanent magnet motor of at least one sub-winding branch in the second winding branch, wherein the calculation formula is as follows:
E＝V-I0*R；
Wherein E is no-load back electromotive force, V is output voltage, I 0 is current value, and R is internal resistance of the permanent magnet motor.
The output voltage and the current value of other sub-winding branches in the second winding branch are sequentially measured, the initial no-load counter electromotive force of other sub-winding branches in the second winding branch is sequentially calculated, the no-load counter electromotive force of the permanent magnet motor is determined according to the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch, the initial no-load counter electromotive force of one sub-winding branch in the second winding branch can be taken as the no-load counter electromotive force of the permanent magnet motor, and the average value of the initial no-load counter electromotive forces of a plurality of sub-winding branches in the second winding branch can be taken as the no-load counter electromotive force of the permanent magnet motor, but the method is not limited to the method.
Example 2
According to an embodiment of the present invention, there is provided an embodiment of a method of detecting a permanent magnet motor, it being noted that the steps shown in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.
It should be noted that, the detection method of the permanent magnet motor may be applied to the detection system of the permanent magnet motor in the foregoing embodiment 1, and specific implementation and application scenarios of the detection method of the permanent magnet motor are the same as those of embodiment 1, which are not described herein.
Fig. 2 is a flowchart of a method for detecting a permanent magnet motor according to an embodiment of the present invention, as shown in fig. 2, the method includes:
Step S202, in response to receiving an idle counter electromotive force detection instruction of the permanent magnet motor, an electric controller in a permanent magnet motor detection system is utilized to supply power to a first winding branch of the permanent magnet motor so as to control the permanent magnet motor to run, wherein the permanent magnet motor comprises a plurality of winding branches, and the winding branches are mutually independent.
The no-load counter electromotive force detection instruction in the step is used for instructing the permanent magnet motor detection system to detect no-load counter electromotive force of the permanent magnet motor.
In an alternative embodiment, the permanent magnet motor comprises a plurality of winding branches, each winding branch of the multi-branch permanent magnet motor can be independently connected with the electric controller to output electromagnetic torque, and each winding branch can be in phase and have phase difference. And after the detection system of the permanent magnet motor receives the no-load counter electromotive force detection instruction, the no-load counter electromotive force of the permanent magnet motor is detected. The electric controller supplies power to the first winding branch of the permanent magnet motor, the detection equipment detects the no-load counter electromotive force of the second winding branch, and the no-load counter electromotive force of the permanent magnet motor is determined according to the no-load counter electromotive force of the second winding branch.
Step S204, during the operation of the permanent magnet motor, the no-load counter electromotive force of the permanent magnet motor is determined based on the second winding branch.
In an alternative embodiment, the detection device in the permanent magnet motor detection system may be a hall effect sensor, which may be used to detect the second winding branch. Detecting the magnetic flux of at least one sub-winding branch in the second winding branch and the rotor angular speed of the permanent magnet motor by using a Hall effect sensor, and calculating the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch based on the magnetic flux of at least one sub-winding branch in the second winding branch and the rotor angular speed of the permanent magnet motor, wherein the calculation formula is as follows:
E＝K*Φ*ω；
Wherein E is the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch, K is a constant, phi is the magnetic flux of at least one sub-winding branch in the second winding branch, and omega is the rotor angular speed of the permanent magnet motor.
In another alternative embodiment, the detection device in the permanent magnet motor detection system may be a power analyzer, which may be used to detect the second winding branch. And detecting the input power and the output power of at least one sub-winding branch in the second winding branch by using a power analyzer, and estimating the mechanical loss power of the permanent magnet motor by a theoretical calculation method. The initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch can be calculated based on the input power of at least one sub-winding branch in the second winding branch, the output power of at least one sub-winding branch in the second winding branch and the mechanical loss power of the permanent magnet motor, and the calculation formula is as follows:
E＝Pin-Pout-Ploss；
Wherein E is the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch, P in is the input power of at least one sub-winding branch in the second winding branch, P out is the output power of at least one sub-winding branch in the second winding branch, and P loss is the mechanical loss power of the permanent magnet motor.
In yet another alternative embodiment, the detection device in the permanent magnet motor detection system may be a voltage sensor, a current sensor, and an oscilloscope, which may be used to detect the second winding branch. The output voltage of at least one sub-winding branch in the second winding branch is detected by using a voltage sensor, the waveform of the output voltage is displayed by an oscilloscope, the current of at least one sub-winding branch in the second winding branch is detected by using a current sensor, and the waveform of a current signal can be displayed by the oscilloscope. By observing and analyzing the output voltage waveform and the current signal waveform displayed by the oscilloscope, the output voltage of at least one sub-winding branch in the second winding branch and the current of at least one sub-winding branch in the second winding branch can be obtained. The initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch can be calculated based on the output voltage of at least one sub-winding branch in the second winding branch, the current of at least one sub-winding branch in the second winding branch and the internal resistance of the permanent magnet motor, and the calculation formula is as follows:
E＝V-I0*R；
Wherein E is the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch, V is the output voltage of at least one sub-winding branch in the second winding branch, I 0 is the current value of at least one sub-winding branch in the second winding branch, and R is the internal resistance of the permanent magnet motor.
And then determining the no-load counter electromotive force of the permanent magnet motor according to the initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch. The initial no-load counter electromotive force of each sub-winding branch in the second winding branch can be sequentially measured, and one initial no-load counter electromotive force is taken as the no-load counter electromotive force of the permanent magnet motor. And after the initial no-load counter electromotive force of each sub-winding branch in the second winding branch is measured in sequence, taking the average value of the initial no-load counter electromotive forces of each sub-winding branch in the second winding branch as the no-load counter electromotive force of the permanent magnet motor. The initial no-load counter electromotive force of each sub-winding branch in the second winding branch can be sequentially measured, and the mode in the initial no-load counter electromotive force is taken as the no-load counter electromotive force of the permanent magnet motor, but the initial no-load counter electromotive force is not limited to the no-load counter electromotive force.
In the embodiment of the invention, the detection method of the permanent magnet motor comprises the following steps: in response to receiving an idle counter electromotive force detection instruction of the permanent magnet motor, supplying power to a first winding branch of the permanent magnet motor by an electric controller in a permanent magnet motor detection system to control the permanent magnet motor to operate, wherein the permanent magnet motor comprises a plurality of winding branches which are mutually independent, and the permanent magnet motor detection system is the permanent magnet motor detection system; during operation of the permanent magnet motor, an idling back electromotive force of the permanent magnet motor is determined based on the second winding branch. It is easy to notice that through designing permanent magnet motor winding branch road, use the electronic controller to supply power to specific winding branch road, use detection equipment to detect the no-load back electromotive force of specific winding branch road, can simplify the system that acquires permanent magnet motor back electromotive force to realized reducing the technical effect of permanent magnet motor's back electromotive force acquisition cost, and then solved the technical problem that permanent magnet motor's back electromotive force acquisition cost is too high.
Optionally, during operation of the permanent magnet motor, determining an idling back electromotive force of the permanent magnet motor based on the second winding branch includes: detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor; the no-load back emf is determined based on the initial no-load back emf of at least one sub-winding leg.
In an alternative embodiment, a detection device in the permanent magnet motor detection system may be used to detect the magnetic flux of at least one sub-winding branch in the second winding branch and the rotor angular velocity of the permanent magnet motor, and calculate the initial no-load counter electromotive force of at least one sub-winding branch according to the magnetic flux of at least one sub-winding branch in the second winding branch and the rotor angular velocity of the permanent magnet motor. The output power and the input power of at least one sub-winding branch in the second winding branch can be detected by using detection equipment in the permanent magnet motor detection system, and the initial no-load counter electromotive force of at least one sub-winding branch can be obtained by calculating according to the input power of at least one sub-winding branch in the second winding branch, the output power of at least one sub-winding branch in the second winding branch and the mechanical loss power of the permanent magnet motor. The no-load back emf of the permanent magnet motor may then be determined from the initial no-load back emf of at least one of the sub-winding branches.
Optionally, the second winding leg includes a sub-winding leg, the determining the no-load back emf based on an initial no-load back emf of at least one of the sub-winding legs, comprising: the initial no-load back emf of the sub-winding leg is determined to be no-load back emf.
In an alternative embodiment, if the second winding leg comprises a sub-winding leg, the initial no-load back emf of the sub-winding leg is taken as the no-load back emf of the permanent magnet motor.
Optionally, the second winding leg includes a plurality of sub-winding legs, the determining the no-load back emf based on an initial no-load back emf of at least one of the sub-winding legs, comprising: an average value of initial no-load back emf of the plurality of sub-winding legs is determined as no-load back emf.
In an alternative embodiment, if the second winding branch includes a plurality of sub-winding branches, after determining initial no-load counter electromotive forces of the plurality of sub-winding branches, an average value of the initial no-load counter electromotive forces of the plurality of sub-winding branches may be taken as the no-load counter electromotive forces of the permanent magnet motor.
Example 3
According to the embodiment of the present invention, an embodiment of a detection device for a permanent magnet motor is further provided, where the device may execute the detection method for a permanent magnet motor provided in the foregoing embodiment 2, and a specific implementation manner and a preferred application scenario are the same as those of the foregoing embodiment 2, and are not described herein.
Fig. 3 is a schematic diagram of a detection device of a permanent magnet motor according to an embodiment of the present invention, as shown in fig. 3, the device includes:
And the power supply module 30 is configured to supply power to the first winding branch of the permanent magnet motor by using an electric controller in the permanent magnet motor detection system in response to receiving an idle counter electromotive force detection instruction of the permanent magnet motor, so as to control the permanent magnet motor to operate, where the permanent magnet motor includes a plurality of winding branches, the winding branches are mutually independent, and the permanent magnet motor detection system is the permanent magnet motor detection system described above.
A determination model 32 is used for determining the no-load back electromotive force of the permanent magnet motor based on a second winding branch during the operation of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch in the plurality of winding branches.
The determining module comprises: the detection unit is used for detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor; and a determining unit for determining the no-load back emf based on the initial no-load back emf of at least one sub-winding leg.
The determining unit is further adapted to determine an initial no-load back emf of the sub-winding branch as said no-load back emf when the second winding branch comprises a sub-winding branch.
The determining unit is further configured to determine an average value of initial no-load counter electromotive forces of the plurality of sub-winding branches as the no-load counter electromotive forces when the second winding branch includes the plurality of sub-winding branches.
Example 4
The embodiment of the application also provides electronic equipment, which comprises: a memory storing an executable program; and a processor for running a program, wherein the program when run performs the methods of the various embodiments of the present application.
Example 5
Embodiments of the present application also provide a computer-readable storage medium including a stored executable program, wherein the executable program when run controls a device in which the computer-readable storage medium resides to perform the methods of the embodiments of the present application.
Example 6
Embodiments of the application also provide a computer program product comprising a computer program which, when executed by a processor, implements the methods of the various embodiments of the application.
Example 7
Embodiments of the present application also provide a computer program product comprising a non-volatile computer readable storage medium for storing a computer program which, when executed by a processor, implements the methods of the various embodiments of the application.
Example 8
Embodiments of the present application also provide a computer program which, when executed by a processor, implements the methods of the various embodiments of the application described above. The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (11)
1. A permanent magnet motor detection system, comprising:
the permanent magnet motor comprises a plurality of winding branches, wherein the winding branches are mutually independent;
The electric controller is connected with a first winding branch of the plurality of winding branches and is used for supplying power to the first winding branch so as to control the permanent magnet motor to run;
The detection device is connected with a second winding branch of the plurality of winding branches and is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch of the plurality of winding branches except the first winding branch.
2. The system of claim 1, wherein the detection device comprises:
The detection end of the sensor is connected with the second winding branch and is used for detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor;
And the processor is connected with the output end of the sensor and is used for determining the no-load counter electromotive force according to the initial no-load counter electromotive force of the at least one sub-winding branch.
3. The system of claim 2, wherein the sensor comprises at least one of: oscilloscopes, power analyzers, voltage sensors.
4. A method of detecting a permanent magnet motor, comprising:
In response to receiving an idle counter electromotive force detection instruction of a permanent magnet motor, powering a first winding branch of the permanent magnet motor by an electric controller in a permanent magnet motor detection system to control the permanent magnet motor to run, wherein the permanent magnet motor comprises a plurality of winding branches which are mutually independent, and the permanent magnet motor detection system is the permanent magnet motor detection system according to any one of claims 1-3;
And determining the no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the operation process of the permanent magnet motor.
5. The method of claim 4, wherein determining an idling back emf of the permanent magnet machine based on the second winding branch during operation of the permanent magnet machine comprises:
detecting initial no-load counter electromotive force of at least one sub-winding branch in the second winding branch in the running process of the permanent magnet motor;
the no-load back emf is determined based on an initial no-load back emf of the at least one sub-winding leg.
6. The method of claim 5, wherein the second winding leg comprises a sub-winding leg, wherein determining the no-load back emf based on an initial no-load back emf of the at least one sub-winding leg comprises:
and determining the initial no-load counter electromotive force of the sub-winding branch as the no-load counter electromotive force.
7. The method of claim 5, wherein the second winding leg comprises a plurality of sub-winding legs, the determining the no-load back emf based on an initial no-load back emf of the at least one sub-winding leg comprising:
And determining the average value of initial no-load counter electromotive force of the plurality of sub-winding branches as the no-load counter electromotive force.
8. A detection device for a permanent magnet motor, comprising:
The power supply module is used for responding to receiving an idle counter electromotive force detection instruction of the permanent magnet motor, and supplying power to a first winding branch of the permanent magnet motor by an electric controller in a permanent magnet motor detection system so as to control the permanent magnet motor to operate, wherein the permanent magnet motor comprises a plurality of winding branches which are mutually independent, and the permanent magnet motor detection system is the permanent magnet motor detection system according to any one of claims 1-3;
and the determining module is used for determining no-load counter electromotive force of the permanent magnet motor based on the second winding branch in the running process of the permanent magnet motor, wherein the second winding branch is a winding branch except the first winding branch in the winding branches.
9. An electronic device, comprising:
A memory storing an executable program;
A processor for running the program, wherein the program when run performs the method of any one of claims 4 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored executable program, wherein the executable program when run controls a device in which the storage medium is located to perform the method of any one of claims 4 to 7.
11. A computer program product comprising a computer program which, when executed by a processor, implements the method according to any of claims 4 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410246614.1A CN118050637A (en) | 2024-03-04 | 2024-03-04 | Permanent magnet motor detection system, method and device, storage medium and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410246614.1A CN118050637A (en) | 2024-03-04 | 2024-03-04 | Permanent magnet motor detection system, method and device, storage medium and electronic equipment |
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| CN118050637A true CN118050637A (en) | 2024-05-17 |
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| CN202410246614.1A Pending CN118050637A (en) | 2024-03-04 | 2024-03-04 | Permanent magnet motor detection system, method and device, storage medium and electronic equipment |
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