On-line measuring method and device for electric parameters of electromagnetic bearing electromagnet of main helium fan

Abstract

The application provides an online measurement method and device for electrical parameters of an electromagnetic bearing electromagnet of a main helium blower, and relates to the technical fields of electromagnetic bearings and data processing. The method comprises the following steps: acquiring bus voltage and current sampling values of the electromagnetic bearing electromagnet of the main helium blower within a first time, and acquiring switching driving signals of a switching power amplifier connected to the electromagnet within the first time; determining a working state of the electromagnet based on the switching driving signals; and acquiring electrical parameters of the electromagnet according to the first time, the bus voltage, the current sampling values and the duration of a specified working state. The application can accurately reflect changes occurring in the electrical parameters of the electromagnet during operation, realizes online measurement of the electrical parameters of the electromagnetic bearing electromagnet, improves the measurement accuracy of the electrical parameters of the electromagnetic bearing electromagnet, and can meet the requirements of electromagnetic bearing control optimization and state evaluation by performing online monitoring on the working state of the electromagnetic bearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic bearing and the technical field of data processing, and in particular to an online measurement method and device for electrical parameters of an electromagnetic bearing electromagnet of a main helium blower. BACKGROUND

[0002] In related technologies, the main helium blower of a high-temperature gas cooled reactor works in a reactor primary loop and is entirely immersed in a high-temperature high-purity helium environment, and therefore, the main helium blower uses an electromagnetic bearing as a supporting mode. An electromagnet is an actuator of the electromagnetic bearing, which applies varying voltage and current to generate the required electromagnetic force when working, and is a key component of the electromagnetic bearing. The electrical parameters of the electromagnetic bearing electromagnet of the main helium blower have important value for current optimization control of the electromagnetic bearing and state evaluation of the electromagnetic bearing system.

[0003] Therefore, how to accurately reflect changes occurring in the running process of the electrical parameters of the electromagnet, perform online monitoring on the working state of the electromagnetic bearing, facilitate timely optimization of control parameters, and respond to abnormal changes has become one of the important research directions. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, one object of the present application is to provide an online measurement method for electrical parameters of an electromagnetic bearing electromagnet of a main helium blower.

[0005] A second object of the present application is to provide an online measurement device for electrical parameters of an electromagnetic bearing electromagnet of a main helium blower.

[0006] A third object of the present application is to provide an electronic device.

[0007] A fourth object of the present application is to provide a non-transitory computer readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] To achieve the above objects, an online measurement method for electrical parameters of an electromagnetic bearing electromagnet of a main helium blower is provided according to a first aspect of the present application, comprising:

[0010] obtaining bus voltage and current sampling values of the electromagnetic bearing electromagnet of the main helium blower in a first time, and a switching drive signal of a switching power amplifier connected to the electromagnet in the first time;

[0011] determining a working state of the electromagnet based on the switching drive signal;

[0012] obtaining electrical parameters of the electromagnet according to the first time, the bus voltage and current sampling values, and a duration of the specified working state.

[0013] In some embodiments, the specified working state includes a first working state and a second working state, wherein in the first working state, a positive bus voltage is applied across the electromagnet, and in the second working state, a negative bus voltage is applied across the electromagnet.

[0014] In some embodiments, the electrical parameter includes an equivalent resistance and an equivalent inductance of the electromagnet, and the electrical parameter of the electromagnet is obtained according to the first time, the bus voltage, the current sample value, and a duration of the specified working state, including:

[0015] The equivalent resistance of the electromagnet is obtained according to the first time, the bus voltage, the current sample value, a first duration of the first working state, and a second duration of the second working state.

[0016] A first current at a start time of the target working state and a second current at an end time of the target working state are determined from the current sample value, the target working state being the first working state or the second working state.

[0017] The equivalent inductance of the electromagnet is obtained according to the equivalent resistance, the first current, the second current, the bus voltage, and a duration of the target working state.

[0018] In some embodiments, the equivalent resistance of the electromagnet is obtained according to the first time, the bus voltage, the current sample value, the first duration of the first working state, and the second duration of the second working state, including:

[0019] An equivalent voltage is obtained according to the first time, the bus voltage, the first duration, and the second duration.

[0020] An average current is obtained according to an average value of the current sample value.

[0021] The equivalent resistance of the electromagnet is obtained according to a ratio of the equivalent voltage and the average current.

[0022] In some embodiments, the equivalent voltage is obtained according to the first time, the bus voltage, the first duration, and the second duration, including:

[0023] A difference between the first duration and the second duration is determined as a duration difference value.

[0024] A ratio of the duration difference value and the first time is taken as a time ratio value, and a product of the bus voltage and the time ratio value is taken as the equivalent voltage.

[0025] In some embodiments, the equivalent inductance of the electromagnet is obtained according to the equivalent resistance, the first current, the second current, the bus voltage, and the duration of the target working state, including:

[0026] the first candidate voltage is obtained according to a product of an average value of the first current and the second current and the equivalent resistance;

[0027] the target voltage is obtained according to a difference between the second candidate voltage and the first candidate voltage, wherein the second candidate voltage is the bus voltage if the target working state is the first working state, and the second candidate voltage is an opposite number of the bus voltage if the target working state is the second working state;

[0028] the equivalent inductance of the electromagnet is obtained by dividing a product of the target voltage and a duration of the target working state by a difference between the second current and the first current.

[0029] The application can accurately reflect changes occurring in the running process of the electrical parameters of the electromagnet, realizes online measurement of the electrical parameters of the electromagnet of the magnetic bearing, improves the measurement accuracy of the electrical parameters of the electromagnet of the magnetic bearing, and online monitors the working state of the magnetic bearing, which is convenient for timely optimizing the control parameters and responding to abnormal changes, and can meet the requirements of control optimization and state evaluation of the magnetic bearing.

[0030] To achieve the above object, the second aspect of the application provides an online measurement device for electrical parameters of an electromagnet of a main helium blower magnetic bearing, comprising:

[0031] a first obtaining module, configured to obtain a bus voltage and current sampling values of the electromagnet of the main helium blower magnetic bearing in a first time, and a switching driving signal of a switching power amplifier connected to the electromagnet in the first time;

[0032] a determining module, configured to determine a working state of the electromagnet based on the switching driving signal;

[0033] a second obtaining module, configured to obtain electrical parameters of the electromagnet according to the first time, the bus voltage, the current sampling values and a duration of a specified working state.

[0034] In some embodiments, the specified working state comprises a first working state and a second working state, wherein a forward bus voltage is applied across the electromagnet in the first working state, and a reverse bus voltage is applied across the electromagnet in the second working state.

[0035] In some embodiments, the electrical parameters comprise an equivalent resistance and an equivalent inductance of the electromagnet, and the second obtaining module is further configured to:

[0036] obtain the equivalent resistance of the electromagnet according to the first time, the bus voltage, the current sampling values, a first duration of the first working state and a second duration of the second working state;

[0037] determine a first current at a beginning of the target working state and a second current at an end of the target working state from the current sample values, the target working state being the first working state or the second working state.

[0038] obtain the equivalent inductance of the electromagnet according to the equivalent resistance, the first current, the second current, the bus voltage and the duration of the target working state.

[0039] In some embodiments, the second obtaining module is further configured to:

[0040] obtain the equivalent voltage according to the first time, the bus voltage, the first duration and the second duration;

[0041] obtain the average current according to the average of the current sample values;

[0042] obtain the equivalent resistance of the electromagnet according to the ratio of the equivalent voltage and the average current.

[0043] In some embodiments, the second obtaining module is further configured to:

[0044] determine a difference between the first duration and the second duration as a duration difference;

[0045] take the ratio of the duration difference and the first time as a time ratio, and take the product of the bus voltage and the time ratio as the equivalent voltage.

[0046] In some embodiments, the second obtaining module is further configured to:

[0047] obtain a first candidate voltage according to the product of the average of the first current and the second current and the equivalent resistance;

[0048] obtain a target voltage according to the difference between a second candidate voltage and the first candidate voltage, wherein the second candidate voltage is the bus voltage if the target working state is the first working state, and the second candidate voltage is the opposite of the bus voltage if the target working state is the second working state;

[0049] obtain the equivalent inductance of the electromagnet according to the product of the target voltage and the duration of the target working state, divided by the difference between the second current and the first current.

[0050] To achieve the above object, a third aspect of the present application provides an electronic device, comprising:

[0051] at least one processor; and

[0052] a memory connected with the at least one processor in communication; wherein

[0053] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the online measurement method of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower provided in the first aspect of the application.

[0054] To achieve the above object, the fourth aspect of the application provides a computer readable storage medium, which stores computer instructions, wherein the computer instructions are used to enable a computer to perform the online measurement method of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower according to the first aspect of the application.

[0055] To achieve the above object, the fifth aspect of the application provides a computer program product, which comprises a computer program, and the computer program implements the online measurement method of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower according to the first aspect of the application when executed by a processor. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a flowchart of the online measurement method of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower according to an embodiment of the application;

[0057] Figure 2 is a schematic diagram of an equivalent circuit of the first working state according to an embodiment of the application;

[0058] Figure 3 is a schematic diagram of an equivalent circuit of the second working state according to an embodiment of the application;

[0059] Figure 4 is a schematic diagram of an equivalent circuit of the third working state according to an embodiment of the application;

[0060] Figure 5 is a schematic diagram of an equivalent circuit of the fourth working state according to an embodiment of the application;

[0061] Figure 6 is a flowchart of the online measurement method of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower according to an embodiment of the application;

[0062] Figure 7 is a schematic diagram of the online measurement method of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower according to an embodiment of the application;

[0063] Figure 8 is a structural block diagram of the online measurement device of the electrical parameters of the electromagnetic bearing electromagnet of the main helium blower according to an embodiment of the application;

[0064] Figure 9 is a structural schematic diagram of an electronic device according to an embodiment of the application. DETAILED DESCRIPTION

[0065] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0066] The method and device for on-line measurement of electrical parameters of the electromagnetic bearing electromagnet of the main helium blower of the present application are described below in combination with the drawings.

[0067] Figure 1 is a flow chart of the method for on-line measurement of electrical parameters of the electromagnetic bearing electromagnet of the main helium blower of an embodiment of the present application, as shown in Figure 1 The method comprises the following steps:

[0068] S101, obtaining bus voltage and current sampling values of the electromagnetic bearing electromagnet of the main helium blower in a first time, and a switching driving signal of a switching power amplifier connected to the electromagnet in the first time.

[0069] The present application aims to realize on-line measurement of electrical parameters of the electromagnetic bearing electromagnet, to provide data for state monitoring and control optimization of the electromagnetic bearing, and for this purpose, in the embodiments of the present application, a high-speed current sensor is disposed between the driving unit of the switching power amplifier and the electromagnet, and a synchronous sampling analog-to-digital converter is used to sample the current of the electromagnet, to obtain current sampling values of the electromagnetic bearing electromagnet of the main helium blower in a first time.

[0070] In the embodiments of the present application, the switching driving signal of the switching power amplifier can control the working state of the switching power amplifier, and in turn control the working state of the electromagnet.

[0071] In the stable state after each switching, the electrical parameters of the electromagnet are basically constant, and it needs to be noted that in the embodiments of the present application, the bus voltage and current sampling values of the electromagnet are parameters obtained by high-speed measurement in the stable state, and through multi-point sampling, the influence of measurement noise can be reduced, and the measurement accuracy can be improved.

[0072] S102, determining the working state of the electromagnet based on the switching driving signal.

[0073] In the embodiments of the present application, the switching driving signal of the switching power amplifier is analyzed, and the working state of the electromagnet can be divided into four different working states, and for each working state, different equivalent circuit forms can be analyzed.

[0074] Figure 2 is a schematic diagram of the equivalent circuit of the first working state of an embodiment of the present application, as shown in Figure 2As shown, in the first working state, a positive bus voltage is applied across the electromagnet, and the circuit relationship is as follows:

[0075]

[0076] Wherein, V represents the bus voltage at the current time, i represents the current at the current time, R represents the equivalent resistance of the electromagnet, L represents the equivalent inductance of the electromagnet, and t represents time.

[0077] Figure 3 FIG. 3 is a schematic diagram of an equivalent circuit of a second working state of an embodiment of the present application, as shown in Figure 3 As shown, in the second working state, a reverse bus voltage is applied across the electromagnet, and the circuit relationship is as follows:

[0078]

[0079] Figure 4 FIG. 4 is a schematic diagram of an equivalent circuit of a third working state of an embodiment of the present application, Figure 5 FIG. 5 is a schematic diagram of an equivalent circuit of a fourth working state of an embodiment of the present application, as shown in Figure 4 Figure 5 As shown, in the third working state and the fourth working state, no voltage is applied across the electromagnet, and the circuit relationship is as follows:

[0080]

[0081] The online measurement of the electrical parameters of the electromagnet is carried out through the above relationship.

[0082] In S103, the electrical parameters of the electromagnet are obtained according to the first time, the bus voltage, the current sampling value, and the duration of the specified working state.

[0083] In some embodiments, the specified working state includes the first working state and the second working state, wherein in the first working state, a positive bus voltage is applied across the electromagnet, and in the second working state, a reverse bus voltage is applied across the electromagnet.

[0084] The equivalent inductance is an energy storage element, which determines the speed of the current change of the electromagnet under a certain voltage, and the equivalent resistance is an energy consumption element, which determines the size of the heat generated by the electromagnet under a certain current. The electrical parameters of the electromagnet mainly include the equivalent resistance and the equivalent inductance of the electromagnet.

[0085] In the embodiments of the present application, the electrical parameters of the electromagnet are obtained by calculation according to the first time, the bus voltage, the current sampling value, and the duration of the specified working state, so as to realize the online measurement of the electrical parameters of the electromagnet of the electromagnetic bearing.

[0086] ​In the embodiment of the present application, bus voltage and current sample values of the electromagnetic iron of the main helium blower electromagnetic bearing in a first time are acquired, and switching drive signals of a switching power amplifier connected with the electromagnetic iron in the first time are acquired; the working state of the electromagnetic iron is determined based on the switching drive signals; and the electrical parameter of the electromagnetic iron is acquired according to the first time, the bus voltage, the current sample values and the duration of the specified working state. The present application can accurately reflect the changes occurring in the electrical parameter of the electromagnetic iron during operation, realizes online measurement of the electrical parameter of the electromagnetic iron of the electromagnetic bearing, improves the measurement accuracy of the electrical parameter of the electromagnetic iron of the electromagnetic bearing, and online monitors the working state of the electromagnetic bearing, which is convenient for timely optimizing the control parameter and responding to abnormal changes, and can meet the requirements of electromagnetic bearing control optimization and state evaluation.

[0087] Figure 6 is a flow chart of the online measurement method of the electrical parameter of the electromagnetic iron of the main helium blower electromagnetic bearing according to an embodiment of the present application, as shown in the figure, the method comprises the following steps: Figure 6

[0088] S601, bus voltage and current sample values of the electromagnetic iron of the main helium blower electromagnetic bearing in a first time are acquired, and switching drive signals of a switching power amplifier connected with the electromagnetic iron in the first time are acquired.

[0089] S602, the working state of the electromagnetic iron is determined based on the switching drive signals.

[0090] The introduction of steps S601 to S602 can refer to the content in the above embodiment, which will not be described here again.

[0091] S603, the equivalent resistance of the electromagnetic iron is acquired according to the first time, the bus voltage, the current sample values, the first duration of the first working state and the second duration of the second working state.

[0092] In some embodiments, the equivalent voltage is acquired according to the first time, the bus voltage, the first duration and the second duration. The average current is acquired according to the average value of the current sample values. The equivalent resistance of the electromagnetic iron is acquired according to the ratio of the equivalent voltage and the average current.

[0093] In some embodiments, the difference between the first duration and the second duration is determined as a duration difference value, the ratio of the duration difference value and the first time is taken as a time ratio value, and the product of the bus voltage and the time ratio value is taken as the equivalent voltage.

[0094] Optionally, the equivalent voltage can be acquired by the following formula:

[0095]

[0096] ​Wherein, U represents an equivalent voltage, t1 represents a first duration, t2 represents a second duration, and T represents a first time.

[0097] Optionally, the average current can be obtained by using the following formula:

[0098]

[0099] Wherein, I represents an average current, T i , and T i+1 respectively represent an i th moment and an i+1 th moment in the first time, I i , and I i+1 respectively represent current sampling values at the i th moment and the i+1 th moment.

[0100] Optionally, the equivalent resistance can be obtained by using the following formula:

[0101]

[0102] S604, determining a first current at the beginning of a target working state and a second current at the end of the target working state from the current sampling values, the target working state being the first working state or the second working state.

[0103] S605, obtaining an equivalent inductance of the electromagnet according to the equivalent resistance, the first current, the second current, a bus voltage, and a duration of the target working state.

[0104] In some embodiments, a first candidate voltage is obtained according to a product of an average value of the first current and the second current and the equivalent resistance. A target voltage is obtained according to a difference between a second candidate voltage and the first candidate voltage, wherein the second candidate voltage is the bus voltage if the target working state is the first working state, and the second candidate voltage is an opposite value of the bus voltage if the target working state is the second working state. A current difference value is obtained by subtracting the first current from the second current. The equivalent inductance of the electromagnet is obtained by dividing a product of the target voltage and the duration of the target working state by the current difference value.

[0105] In the embodiments of the present application, in the stable case of one switching state, the inductance and the resistance can be considered to be basically unchanged. When the equivalent resistance is obtained by step S603 and the inductance is calculated by using the first working state or the second working state, the following equation is obtained:

[0106]

[0107] Wherein, i1 represents a current at the beginning of the target working state, i.e. the first current, i2 represents a current at the end of the target working state, i.e. the second current, and △T represents a duration of the target working state.

[0108] In this process, the working current i is always changing, but because the △T is usually very small, the current change is not large, and when the target working state is the first working state, the equivalent inductance can be obtained by using the following formula by taking the average of the first current and the second current as the working current i:

[0109]

[0110] Similarly, when the target working state is the second working state, the equivalent inductance can be obtained by using the following formula:

[0111]

[0112] The application can accurately reflect the changes occurring in the running process of the electromagnetic iron electrical parameters, realize the online measurement of the electromagnetic bearing electromagnetic iron electrical parameters, improve the measurement accuracy of the electromagnetic bearing electromagnetic iron electrical parameters, and online monitor the working state of the electromagnetic bearing. It is convenient to optimize the control parameters in time and respond to abnormal changes, which can meet the requirements of electromagnetic bearing control optimization and state evaluation.

[0113] Figure 7 is a schematic diagram of an embodiment of the online measurement method of the main helium fan electromagnetic bearing electromagnetic iron electrical parameters of the application, as Figure 7 shown, in the electromagnetic bearing system, the power amplifier driving unit is connected with the electromagnetic iron and the current controller respectively, in the embodiment of the application, the electromagnetic iron electrical parameter online measurement unit is arranged between the power amplifier driving unit and the electromagnetic iron, the electromagnetic iron electrical parameter online measurement unit includes a state triggering module, a high-frequency clock module, a calculation module, a sample and hold module, and an analog-to-digital conversion module, wherein the calculation module is connected with the state triggering module, the high-frequency clock module, and the analog-to-digital conversion module respectively, and the sample and hold module is connected with the state triggering module and the analog-to-digital conversion module respectively.

[0114] The high-frequency clock module provides a high-precision and discrete clock signal for the calculation module, and the frequency is much higher than the switching frequency of the switching power amplifier, which is convenient for obtaining the current sampling time and the working state duration. The precision after discretization meets the requirements of electrical parameter calculation.

[0115] The state triggering module determines the time of switching state of the switching power amplifier according to the switching driving signal, so as to determine the working state of the electromagnetic iron, and triggers the sample and hold module and the analog-to-digital conversion module to sample and convert the current, so as to obtain the current sampling value.

[0116] The calculation module receives the current sampling value and the duration of the specified working state, and combines the bus voltage and the total sampling time (the first time) to complete the calculation of the electromagnetic iron electrical parameters.

[0117] In the embodiments of the present application, the synchronization mechanism of the working state of the electromagnet and the current sampling can realize the high-speed acquisition of the current while the state of the switch power amplifier is switched.

[0118] The present application can accurately reflect the changes occurring in the running process of the electrical parameters of the electromagnet, realize the online measurement of the electrical parameters of the electromagnet of the electromagnetic bearing, improve the measurement accuracy of the electrical parameters of the electromagnet of the electromagnetic bearing, and online monitor the working state of the electromagnetic bearing, which is convenient for timely optimizing the control parameters and responding to abnormal changes, and can meet the requirements of the control optimization and state evaluation of the electromagnetic bearing.

[0119] Figure 8 The structure diagram of the online measurement device of the electrical parameters of the main helium blower electromagnetic bearing electromagnet according to one embodiment of the present disclosure is shown in FIG. 8. Figure 8 As shown in FIG. 8, the online measurement device 800 of the electrical parameters of the main helium blower electromagnetic bearing electromagnet includes:

[0120] The first acquisition module 810 is configured to acquire the bus voltage and the current sampling value of the main helium blower electromagnetic bearing electromagnet within a first time, and the switching driving signal of the switch-type power amplifier connected to the electromagnet within the first time.

[0121] The determination module 820 is configured to determine the working state of the electromagnet based on the switching driving signal.

[0122] The second acquisition module 830 is configured to acquire the electrical parameters of the electromagnet according to the first time, the bus voltage, the current sampling value, and the duration of the specified working state.

[0123] In some embodiments, the specified working state includes a first working state and a second working state, wherein in the first working state, the bus voltage applied to the electromagnet is forward, and in the second working state, the bus voltage applied to the electromagnet is reverse.

[0124] In some embodiments, the electrical parameters include the equivalent resistance and the equivalent inductance of the electromagnet, and the second acquisition module 830 is further configured to:

[0125] acquire the equivalent resistance of the electromagnet according to the first time, the bus voltage, the current sampling value, the first duration of the first working state, and the second duration of the second working state;

[0126] determine a first current at the beginning of the target working state and a second current at the end of the target working state from the current sampling value, the target working state being the first working state or the second working state.

[0127] acquire the equivalent inductance of the electromagnet according to the equivalent resistance, the first current, the second current, the bus voltage, and the duration of the target working state.

[0128] In some embodiments, the second obtaining module 830 is further configured to:

[0129] obtain the equivalent voltage according to the first time, the bus voltage, the first time duration and the second time duration;

[0130] obtain the average current according to the average of the current sample values;

[0131] obtain the equivalent resistance of the electromagnet according to the ratio of the equivalent voltage and the average current.

[0132] In some embodiments, the second obtaining module 830 is further configured to:

[0133] determine the difference between the first time duration and the second time duration as a time duration difference;

[0134] obtain the time ratio as the ratio of the time duration difference and the first time, and obtain the equivalent voltage as the product of the bus voltage and the time ratio.

[0135] In some embodiments, the second obtaining module 830 is further configured to:

[0136] obtain the first candidate voltage according to the product of the average of the first current and the second current and the equivalent resistance;

[0137] obtain the target voltage according to the difference between the second candidate voltage and the first candidate voltage, wherein the second candidate voltage is the bus voltage if the target working state is the first working state, and the second candidate voltage is the opposite of the bus voltage if the target working state is the second working state;

[0138] obtain the equivalent inductance of the electromagnet by dividing the product of the target voltage and the time duration of the target working state by the current difference value.

[0139] The application can accurately reflect the changes occurring in the running process of the electrical parameters of the electromagnet, realize online measurement of the electrical parameters of the electromagnet of the magnetic bearing, improve the measurement accuracy of the electrical parameters of the electromagnet of the magnetic bearing, and online monitor the working state of the magnetic bearing, which is convenient for timely optimizing the control parameters and responding to abnormal changes, and can meet the requirements of control optimization and state evaluation of the magnetic bearing.

[0140] Based on the same application concept, the embodiments of the application further provide an electronic device.

[0141] Figure 9 The structural schematic diagram of the electronic device provided by the embodiments of the application is shown in FIG. 1. Figure 9As shown, the electronic device 900 includes a memory 901, a processor 902, and a computer program product stored in the memory 901 and executable on the processor 902, and the processor implements the online measurement method of the electrical parameters of the main helium fan electromagnetic bearing electromagnet as described above when executing the computer program.

[0142] Those skilled in the art will understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer usable program code.

[0143] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce a device that implements the flow Figure 1 one or more flows and / or blocks Figure 1 means for performing the function specified by the flow or flows and / or block or blocks.

[0144] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including instruction means, which implements the flow Figure 1 one or more flows and / or blocks Figure 1 the function specified by the flow or flows and / or block or blocks.

[0145] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide a process for implementing the flow Figure 1 one or more flows and / or blocks Figure 1 the function specified by the flow or flows and / or block or blocks.

[0146] Based on the same application concept, the embodiment of the present application also provides a computer readable storage medium, which stores computer instructions, wherein the computer instructions are used to make a computer execute the online measurement method of the electrical parameters of the electromagnetic iron of the main helium blower electromagnetic bearing.

[0147] Based on the same application concept, the embodiment of the present application also provides a computer program product, which comprises a computer program, and the computer program is used to execute the online measurement method of the electrical parameters of the electromagnetic iron of the main helium blower electromagnetic bearing in the above embodiment when executed by a processor.

[0148] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word comprising does not exclude the presence of additional elements or steps. The words a or an shall not exclude the presence of a plurality of elements, regardless of being preceded by the term one or a. The application can be implemented by means of both hardware and software, and any combination thereof. In the claims, the word comprising does not exclude the presence of additional elements or steps. The word first, second, third etc. does not imply any order. The terms first, second, third etc. are to be interpreted in their ordinal sense.

[0149] Furthermore, the terms first, second, third, etc. are used only to describe different instances, and do not imply a relative importance or a specific number of the indicated technical characteristics. Thus, these terms are used interchangeably to designate the characteristics being referred to. In the description of the application the term "a plurality of" means two or more, unless expressly specified otherwise.

[0150] Although preferred embodiments of the application have been described, those skilled in the art will be able to make additional modifications and variations without departing from the spirit and scope of the application. Therefore, the appended claims are intended to cover all such modifications and variations as falling within the scope of the application. Accordingly, the application is not limited to the above-described embodiments, but is only limited by the scope of the claims.

[0151] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application embrace all such modifications and changes and, accordingly, the application is not limited to the preferred embodiments described herein.

Claims

1. An online measurement method for the electrical parameters of the electromagnet of the electromagnetic bearing of a main helium blower, characterized in that, include: The bus voltage and current sampling values ​​of the electromagnet of the main helium blower electromagnetic bearing are obtained within the first time period, as well as the switching drive signal of the switching power amplifier connected to the electromagnet within the first time period. The working state of the electromagnet is determined based on the switch drive signal; The electrical parameters of the electromagnet are obtained based on the first time, the bus voltage, the current sampling value, and the duration of the specified operating state. The specified operating state includes a first operating state and a second operating state. In the first operating state, a positive bus voltage is applied to both ends of the electromagnet, and in the second operating state, a reverse bus voltage is applied to both ends of the electromagnet. The electrical parameters include the equivalent resistance and equivalent inductance of the electromagnet. Obtaining the electrical parameters of the electromagnet based on the first time, the bus voltage, the current sampling value, and the duration of the specified operating state includes: obtaining the equivalent resistance of the electromagnet based on the first time, the bus voltage, the current sampling value, the first duration of the first operating state, and the second duration of the second operating state; determining the first current at the start of the target operating state and the second current at the end of the target operating state from the current sampling value, wherein the target operating state is either the first operating state or the second operating state; and obtaining the equivalent inductance of the electromagnet based on the equivalent resistance, the first current, the second current, the bus voltage, and the duration of the target operating state. The method of obtaining the equivalent inductance of the electromagnet based on the equivalent resistance, the first current, the second current, the bus voltage, and the duration of the target operating state includes: obtaining a first candidate voltage by multiplying the average of the first current and the second current by the equivalent resistance; obtaining a target voltage by the difference between the second candidate voltage and the first candidate voltage, wherein if the target operating state is the first operating state, the second candidate voltage is the bus voltage, and if the target operating state is the second operating state, the second candidate voltage is the negative of the bus voltage; taking the difference between the second current and the first current as the current difference, and dividing the product of the target voltage and the duration of the target operating state by the current difference to obtain the equivalent inductance of the electromagnet.

2. The method according to claim 1, characterized in that, The step of obtaining the equivalent resistance of the electromagnet based on the first time, the bus voltage, the current sampling value, the first duration of the first operating state, and the second duration of the second operating state includes: The equivalent voltage is obtained based on the first time, the bus voltage, the first duration, and the second duration. The average current is obtained based on the average value of the current samples. The equivalent resistance of the electromagnet is obtained based on the ratio of the equivalent voltage to the average current.

3. The method according to claim 2, characterized in that, The step of obtaining the equivalent voltage based on the first time, the bus voltage, the first duration, and the second duration includes: The difference between the first duration and the second duration is defined as the duration difference; The ratio of the duration difference to the first time is taken as the time ratio, and the product of the bus voltage and the time ratio is taken as the equivalent voltage.

4. An online measurement device for the electrical parameters of the electromagnet of the electromagnetic bearing of a main helium blower, characterized in that, include: The first acquisition module is used to acquire the bus voltage and current sampling values ​​of the electromagnet of the main helium blower electromagnetic bearing in the first time period, as well as the switching drive signal of the switching power amplifier connected to the electromagnet in the first time period. The determination module is used to determine the working state of the electromagnet based on the switch drive signal; The second acquisition module is used to acquire the electrical parameters of the electromagnet based on the first time, the bus voltage, the current sampling value, and the duration of the specified working state; The specified operating state includes a first operating state and a second operating state. In the first operating state, a positive bus voltage is applied to both ends of the electromagnet, and in the second operating state, a reverse bus voltage is applied to both ends of the electromagnet. The electrical parameters include the equivalent resistance and equivalent inductance of the electromagnet. The second acquisition module is further configured to: acquire the equivalent resistance of the electromagnet based on the first time, the bus voltage, the current sampling value, the first duration of the first operating state, and the second duration of the second operating state; determine the first current at the start of the target operating state and the second current at the end of the target operating state from the current sampling value, wherein the target operating state is the first operating state or the second operating state; and acquire the equivalent inductance of the electromagnet based on the equivalent resistance, the first current, the second current, the bus voltage, and the duration of the target operating state. The second acquisition module is further configured to: acquire a first candidate voltage based on the product of the average of the first current and the second current and the equivalent resistance; acquire a target voltage based on the difference between the second candidate voltage and the first candidate voltage, wherein if the target operating state is the first operating state, the second candidate voltage is the bus voltage, and if the target operating state is the second operating state, the second candidate voltage is the negative of the bus voltage; take the difference between the second current and the first current as the current difference, and divide the product of the target voltage and the duration of the target operating state by the current difference to obtain the equivalent inductance of the electromagnet.

5. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-3.

6. A non-transitory computer-readable storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the steps of the method according to any one of claims 1-3.

7. A computer program product comprising a computer program that, when executed by a processor, implements the method according to any one of claims 1-3.

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