Method and device for testing frequency iron loss in silicon steel rotor sheet

Abstract

The invention belongs to the technical field of measurement, and particularly relates to magnetic variable measurement, in particular to a silicon steel rotor piece frequency iron loss testing method and device, and the method comprises the steps: obtaining the testing iron loss of a silicon steel rotor piece through a control module; the shaft hole damage area of the silicon steel rotor sheet is obtained through the control module; the hole-free area of the silicon steel rotor sheet is obtained through the control module; the actual iron loss of the silicon steel rotor sheet is obtained through the control module according to the test iron loss of the silicon steel rotor sheet, the shaft hole damage area and the hole-free area, so that the actual iron loss of the silicon steel rotor sheet with a punched hole is accurately detected, and the performance of the silicon steel rotor sheet is accurately judged.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and specifically relates to measuring magnetic variables, and in particular to a medium-frequency iron loss test method and device for a silicon steel rotor piece. Background Art

[0002] After processing, silicon steel rotor sheets need to be tested for iron loss. The relevant technology uses the square circle method for testing. Since the square circle method is based on the assumption of a closed magnetic circuit, the punching of the silicon steel rotor sheets will force the magnetic flux lines to bypass, resulting in inaccurate iron loss detection.

[0003] Therefore, due to the technical problem that the square ring method is inaccurate in detecting the iron loss of silicon steel rotor sheets after punching, it is necessary to design a medium-frequency iron loss test method and device for silicon steel rotor sheets.

[0004] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0005] The embodiments of the present disclosure at least provide a method and device for testing the medium-frequency iron loss of a silicon steel rotor sheet.

[0006] In a first aspect, an embodiment of the present disclosure provides a method for testing medium-frequency iron loss of a silicon steel rotor sheet, comprising: Obtain the test iron loss of the silicon steel rotor sheet through the control module; The shaft hole damage area of ​​the silicon steel rotor sheet is obtained through the control module; Obtaining the hole-free area of ​​the silicon steel rotor sheet through a control module; The actual iron loss of the silicon steel rotor sheet is obtained through the control module according to the tested iron loss, shaft hole damage area and non-hole area of ​​the silicon steel rotor sheet.

[0007] In an optional implementation, the method for obtaining the shaft hole damage area of ​​the silicon steel rotor sheet through the control module includes: The control module obtains the shaft hole radius of the silicon steel rotor plate through the distance sensor r , then the width of the shear plastic damage zone of the silicon steel rotor shaft hole is: W eq =ar ; in, W eq is the width of the shear plastic damage zone of the shaft hole of the silicon steel rotor plate; a is the width coefficient; The damage area of ​​the shaft hole of the silicon steel rotor sheet is: A damage= π·（Weq +r） 2 ; in, A damage is the shaft hole damage area of ​​the silicon steel rotor sheet.

[0008] In an optional implementation, the method of obtaining the actual iron loss of the silicon steel rotor sheet according to the test iron loss, shaft hole damage area and non-hole area of ​​the silicon steel rotor sheet by the control module includes: Obtain the shaft hole correction area through the control module: ; in, A e is the corrected area of ​​the shaft hole; A is the hole-free area of ​​the silicon steel rotor sheet; μ r is the relative magnetic permeability of silicon steel.

[0009] In an optional implementation, the actual iron loss of the silicon steel rotor sheet is: ; in, P real is the actual iron loss of the silicon steel rotor sheet; P meas It is the test iron loss of silicon steel rotor plate; η It is the incremental coefficient of iron loss caused by punching and shearing process.

[0010] In an optional implementation, the method for obtaining the test iron loss of the silicon steel rotor sheet through the control module includes: The control module obtains the test iron loss of the silicon steel rotor sheet by using the square circle method through the acquisition circuit; The acquisition circuit includes: a signal source, a power amplifier and a test probe; The test probe is arranged on the silicon steel rotor sheet; The signal source is suitable for sending a sinusoidal wave signal. After the sinusoidal wave signal passes through a power amplifier, the current signal is injected into a test probe. The test probe outputs an induced electromotive force to a control module. The control module uses a square circle method to obtain the test iron loss of the silicon steel rotor sheet according to the induced electromotive force and preset silicon steel rotor sheet parameters.

[0011] In a second aspect, the embodiment of the present disclosure further provides an acquisition circuit used in a medium-frequency iron loss test method for a silicon steel rotor sheet, comprising: Signal sources, power amplifiers and test probes; The test probe is arranged on the silicon steel rotor sheet; The signal source is suitable for sending a sinusoidal wave signal. After the sinusoidal wave signal passes through a power amplifier, the current signal is injected into a test probe. The test probe outputs an induced electromotive force to a control module. The control module uses a square circle method to obtain the test iron loss of the silicon steel rotor sheet according to the induced electromotive force and preset silicon steel rotor sheet parameters.

[0012] In a third aspect, the present disclosure also provides a medium-frequency iron loss testing system for a silicon steel rotor sheet, comprising: A test iron loss acquisition module, which is configured to acquire a test iron loss of a silicon steel rotor sheet; A shaft hole damage area acquisition module, which is configured to acquire the shaft hole damage area of ​​the silicon steel rotor sheet; A non-porous area acquisition module, which is configured to acquire the non-porous area of ​​the silicon steel rotor sheet; The actual iron loss acquisition module is configured to acquire the actual iron loss of the silicon steel rotor sheet according to the tested iron loss, the shaft hole damage area and the non-hole area of ​​the silicon steel rotor sheet.

[0013] In a fourth aspect, the embodiments of the present disclosure further provide a non-transitory readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the above-mentioned medium-frequency iron loss test method for silicon steel rotor sheets.

[0014] In a fifth aspect, the embodiments of the present disclosure further provide a program product comprising instructions, which, when executed by a device, enables the device to execute the steps of the above-mentioned method for testing the medium-frequency iron loss of silicon steel rotor plates.

[0015] In a sixth aspect, the embodiments of the present disclosure further provide a medium-frequency iron loss testing device for a silicon steel rotor sheet, comprising: A control module, and a collection circuit electrically connected to the control module; The acquisition circuit is connected to the silicon steel rotor sheet, and the acquisition circuit is suitable for obtaining the test iron loss of the silicon steel rotor sheet; The control module is configured to adopt the above-mentioned medium-frequency iron loss test method for silicon steel rotor sheets to obtain the actual iron loss of the silicon steel rotor sheets according to the test iron loss.

[0016] The beneficial effect of the present invention is that the medium-frequency iron loss test method of the silicon steel rotor sheet comprises: obtaining the test iron loss of the silicon steel rotor sheet through the control module; obtaining the axial hole damage area of ​​the silicon steel rotor sheet through the control module; obtaining the non-hole area of ​​the silicon steel rotor sheet through the control module; obtaining the actual iron loss of the silicon steel rotor sheet according to the test iron loss, axial hole damage area and non-hole area of ​​the silicon steel rotor sheet through the control module, thereby realizing the accurate detection of the actual iron loss of the silicon steel rotor sheet with punching holes, facilitating the accurate judgment of the performance of the silicon steel rotor sheet.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A flow chart of a method for testing medium-frequency iron loss of a silicon steel rotor sheet provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of a collection circuit provided by an embodiment of the present disclosure; Figure 3 A principle block diagram of a collection circuit provided by an embodiment of the present disclosure; Figure 4 A schematic diagram of the width of the shear plastic damage zone of the shaft hole of a silicon steel rotor sheet provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0023] After processing, silicon steel rotor sheets need to be tested for iron loss. The square circle method is used for testing in related technologies. However, the inventors found that since the square circle method is based on the closed magnetic circuit assumption, the punching of the silicon steel rotor sheets will force the magnetic flux lines to bypass, and the actual damage to the magnetic properties of the material caused by the punching process cannot be obtained. Because there is a shear plastic deformation zone at the punching edge of the silicon steel rotor sheet, the magnetic permeability of this area decreases by 30%-50%, and the hysteresis loss increases by 15%-25%. The magnetic flux lines will avoid the damaged area when bypassing the holes. As a result, the measured iron loss value cannot reflect the actual damage to the magnetic properties of the material caused by the punching process.

[0024] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] like Figure 1 As shown, at least one disclosed embodiment provides a method for testing medium-frequency iron loss of a silicon steel rotor sheet, comprising: obtaining a test iron loss of a silicon steel rotor sheet through a control module; obtaining an axial hole damage area of ​​a silicon steel rotor sheet through a control module; obtaining a non-hole area of ​​a silicon steel rotor sheet through a control module; obtaining an actual iron loss of a silicon steel rotor sheet according to the test iron loss, axial hole damage area and non-hole area of ​​the silicon steel rotor sheet through a control module, thereby achieving accurate detection of the actual iron loss of a silicon steel rotor sheet with punched holes, and facilitating accurate judgment of the performance of the silicon steel rotor sheet.

[0028] In this embodiment, the silicon steel rotor sheet may be a single silicon steel sheet or the like.

[0029] In this embodiment, the control module may be a processor or the like.

[0030] like Figure 4 As shown, in an optional embodiment, the method for obtaining the shaft hole damage area of ​​the silicon steel rotor sheet through the control module includes: obtaining the shaft hole diameter of the silicon steel rotor sheet to calculate the width of its shear plastic damage zone; the control module obtains the shaft hole radius of the silicon steel rotor sheet through a distance measuring sensor r , then the width of the shear plastic damage zone of the silicon steel rotor shaft hole is: W eq =ar ; in, W eq is the width of the shear plastic damage zone of the silicon steel rotor shaft hole, in units of m ; a is the width factor, which can be 0.25; The damage area of ​​the shaft hole of the silicon steel rotor sheet is: A damage= π·（W eq +r） 2 ; in, A damage is the shaft hole damage area of ​​the silicon steel rotor sheet, in units of m 2 .

[0031] In this embodiment, after obtaining the shaft hole damage area of ​​the silicon steel rotor plate, the shaft hole damage area can be taken into consideration in the subsequent process of obtaining the actual iron loss, thereby improving the accuracy of obtaining the actual iron loss and facilitating a more accurate reflection of the performance of the silicon steel rotor plate.

[0032] In this embodiment, the cross-sectional shape of the shaft hole of the silicon steel rotor plate may be circular.

[0033] In an optional implementation, the method for obtaining the actual iron loss of the silicon steel rotor sheet according to the test iron loss, shaft hole damage area and non-hole area of ​​the silicon steel rotor sheet through the control module includes: obtaining the shaft hole correction area through the control module: ; in, A e is the shaft hole correction area, in units of m 2 ; Ais the hole-free area of ​​the silicon steel rotor sheet, in units of m 2 ; μ r is the relative magnetic permeability of silicon steel.

[0034] Specifically, since the shaft hole of the silicon steel rotor sheet will be subjected to stamping, shearing and other operations during the manufacturing process, all of which will cause stress changes at the edge of the shaft hole, which will lead to a difference in the magnetic permeability of this part and the magnetic permeability of the undamaged part. In this regard, a correction method is used. If the magnetic permeability of silicon steel is high, the influence of the shaft hole will be small. Therefore, correction is made according to the relative magnetic permeability of silicon steel. In this embodiment, the non-hole area of ​​the silicon steel rotor sheet can be obtained by subtracting the shaft hole area from the total area of ​​the silicon steel rotor sheet. The total area of ​​the silicon steel rotor sheet and the shaft hole area can be obtained by image recognition and other methods. The total area of ​​the silicon steel rotor sheet can be better obtained by using image recognition.

[0035] In an optional implementation, the actual iron loss of the silicon steel rotor sheet is: ; in, P real is the actual iron loss of the silicon steel rotor sheet, in units of W / kg ; P meas is the test iron loss of silicon steel rotor sheet, in units of W / kg ; η It is the incremental coefficient of iron loss caused by the punching and shearing process, with a value range of 0.05-0.15, and needs to be calibrated by process parameters such as punching gap and punch wear degree.

[0036] Specifically, As the shaft hole correction term, it reflects the correction of the square relationship of magnetic induction intensity caused by magnetic field distortion. η It is the incremental coefficient of iron loss caused by the punching and shearing process. That is, if the punching and shearing gap is small and the punch is not worn, the punching and shearing process has little effect on the iron loss, and it is approximately corrected by the magnetic field distortion caused by the shaft hole.

[0037] like Figure 3As shown, in an optional embodiment, the method for obtaining the test iron loss of the silicon steel rotor sheet through the control module includes: the control module obtains the test iron loss of the silicon steel rotor sheet through the acquisition circuit by the square circle method; the acquisition circuit includes: a signal source, a power amplifier and a test probe; the test probe is arranged on the silicon steel rotor sheet; the signal source is suitable for sending a sinusoidal wave signal, and the current signal of the sinusoidal wave signal is injected into the test probe after passing through the power amplifier, and the test probe outputs an induced electromotive force to the control module, and the control module obtains the test iron loss of the silicon steel rotor sheet by the square circle method according to the induced electromotive force and the preset silicon steel rotor sheet parameters.

[0038] In this embodiment, the preset silicon steel rotor sheet parameters may include the width, thickness, etc. of the silicon steel rotor sheet.

[0039] In this embodiment, the signal source may be electrically connected to the control module, and the control module controls the signal source to emit a sinusoidal wave signal.

[0040] In this embodiment, the specific circuit of the acquisition circuit can be as follows: Figure 2 As shown, the signal source must first generate 50~400 Hz The sine wave signal is injected into the test probe through the power amplifier, and the induced electromotive force is taken out at the other pole of the test probe. E , this design should always keep E The waveform factor is 1.11, the distortion is less than 0.1%; the induced electromotive force E Input to the multiplier, the multiplier will E and E Perform multiplication calculations W = E * E * cosθ , obtain the total energy consumed by the silicon steel rotor sheet, and output the result to the control module so that the control module can obtain the test iron loss; test iron loss P meas = W / wgt ( w / kg ),in, W is the total energy consumed by the silicon steel rotor sheet, in units of J ; w is the width of the silicon steel rotor sheet, in meters. This parameter can be preset in the control module; g is the thickness of the silicon steel rotor sheet, in meters. This parameter can be preset in the control module; t It's time for testing.

[0041] In this embodiment, Figure 2 The control module in is the same control module.

[0042] In this embodiment, if the iron loss is tested P meas is 3.5, the damage area A damage 0.0019, the axis hole correction area A e is 0.0105, iron loss increment coefficient η is 0.1, the relative magnetic permeability of silicon steel μ r 3500, silicon steel rotor plate non-hole area A is 0.0106, then the real iron loss Pr eal is 3.15.

[0043] At least one other disclosed embodiment also provides an acquisition circuit used in a medium-frequency iron loss test method for a silicon steel rotor sheet, comprising: a signal source, a power amplifier and a test probe; the test probe is arranged on the silicon steel rotor sheet; the signal source is suitable for sending a sinusoidal wave signal, and the current signal is injected into the test probe after the sinusoidal wave signal passes through the power amplifier. The test probe outputs an induced electromotive force to a control module, and the control module uses a square circle method to obtain the test iron loss of the silicon steel rotor sheet according to the induced electromotive force and preset silicon steel rotor sheet parameters.

[0044] At least one other disclosed embodiment also provides a medium-frequency iron loss testing system for a silicon steel rotor plate, comprising: a test iron loss acquisition module, which is configured to acquire the test iron loss of the silicon steel rotor plate; an axial hole damage area acquisition module, which is configured to acquire the axial hole damage area of ​​the silicon steel rotor plate; a non-hole area acquisition module, which is configured to acquire the non-hole area of ​​the silicon steel rotor plate; and an actual iron loss acquisition module, which is configured to acquire the actual iron loss of the silicon steel rotor plate based on the test iron loss, axial hole damage area and non-hole area of ​​the silicon steel rotor plate.

[0045] In this embodiment, each module is a virtual module in a program or software that executes various functions, and its functions can be inherited in the control module.

[0046] At least one other disclosed embodiment further provides a non-transitory readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the above-mentioned medium-frequency iron loss test method for silicon steel rotor plates.

[0047] At least one other disclosed embodiment further provides a program product comprising instructions, which, when executed by a device, causes the device to execute the steps of the above-mentioned medium-frequency iron loss test method for silicon steel rotor plates.

[0048] At least one other disclosed embodiment also provides a medium-frequency iron loss testing device for a silicon steel rotor sheet, comprising: a control module, and an acquisition circuit electrically connected to the control module; the acquisition circuit is connected to the silicon steel rotor sheet, and the acquisition circuit is suitable for obtaining the test iron loss of the silicon steel rotor sheet; the control module is configured to adopt the above-mentioned medium-frequency iron loss testing method for silicon steel rotor sheets to obtain the actual iron loss of the silicon steel rotor sheet based on the test iron loss.

[0049] In summary, the medium-frequency iron loss test method of the silicon steel rotor sheet includes: obtaining the test iron loss of the silicon steel rotor sheet through the control module; obtaining the axial hole damage area of ​​the silicon steel rotor sheet through the control module; obtaining the non-hole area of ​​the silicon steel rotor sheet through the control module; obtaining the actual iron loss of the silicon steel rotor sheet according to the test iron loss, axial hole damage area and non-hole area of ​​the silicon steel rotor sheet through the control module, thereby realizing the accurate detection of the actual iron loss of the silicon steel rotor sheet with punching holes, facilitating the accurate judgment of the performance of the silicon steel rotor sheet.

[0050] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for testing the medium frequency iron loss of a silicon steel rotor sheet, characterized in that: include: Obtain the test iron loss of the silicon steel rotor sheet through the control module; The shaft hole damage area of ​​the silicon steel rotor sheet is obtained through the control module; Obtaining the hole-free area of ​​the silicon steel rotor sheet through a control module; The actual iron loss of the silicon steel rotor sheet is obtained through the control module according to the tested iron loss, shaft hole damage area and non-hole area of ​​the silicon steel rotor sheet.

2. The method for testing medium frequency iron loss of silicon steel rotor sheets according to claim 1, characterized in that: The method for obtaining the shaft hole damage area of ​​the silicon steel rotor sheet through the control module includes: The control module obtains the shaft hole radius of the silicon steel rotor plate through the distance sensor r , then the width of the shear plastic damage zone of the silicon steel rotor shaft hole is: W eq =ar ； in, W eq is the width of the shear plastic damage zone of the shaft hole of the silicon steel rotor plate; a is the width coefficient; The damage area of ​​the shaft hole of the silicon steel rotor sheet is: A damage= π·（W eq +r） 2 ； in, A damage is the shaft hole damage area of ​​the silicon steel rotor sheet.

3. The method for testing medium frequency iron loss of silicon steel rotor sheets according to claim 2, characterized in that: The method for obtaining the actual iron loss of the silicon steel rotor sheet according to the test iron loss, shaft hole damage area and non-hole area of ​​the silicon steel rotor sheet by the control module includes: Get the shaft hole correction area through the control module: ； in, A e is the corrected area of ​​the shaft hole; A is the hole-free area of ​​the silicon steel rotor sheet; μ r is the relative magnetic permeability of silicon steel.

4. The method for testing the medium frequency iron loss of a silicon steel rotor sheet according to claim 3, characterized in that: The actual iron loss of the silicon steel rotor sheet is: ； in, P real is the actual iron loss of the silicon steel rotor sheet; P meas It is the test iron loss of silicon steel rotor plate; η It is the incremental coefficient of iron loss caused by punching and shearing process.

5. The method for testing medium frequency iron loss of silicon steel rotor sheets according to claim 1, characterized in that: The method for obtaining the test iron loss of the silicon steel rotor sheet through the control module includes: The control module obtains the test iron loss of the rotor plate by using the square circle method through the acquisition circuit; The acquisition circuit includes: a signal source, a power amplifier and a test probe; The test probe is arranged on the silicon steel rotor sheet; The signal source is suitable for sending a sinusoidal wave signal. After the sinusoidal wave signal passes through a power amplifier, the current signal is injected into a test probe. The test probe outputs an induced electromotive force to a control module. The control module uses a square circle method to obtain the test iron loss of the silicon steel rotor sheet according to the induced electromotive force and preset silicon steel rotor sheet parameters.

6. A collection circuit used in a method for testing the medium-frequency iron loss of a silicon steel rotor sheet, characterized in that: include: Signal sources, power amplifiers and test probes; The test probe is arranged on the silicon steel rotor sheet; The signal source is suitable for sending a sinusoidal wave signal. After the sinusoidal wave signal passes through a power amplifier, the current signal is injected into a test probe. The test probe outputs an induced electromotive force to a control module. The control module uses a square circle method to obtain the test iron loss of the silicon steel rotor sheet according to the induced electromotive force and preset silicon steel rotor sheet parameters.

7. A medium frequency iron loss test system for silicon steel rotor sheets, characterized in that: include: A test iron loss acquisition module, configured to acquire a test iron loss of a silicon steel rotor sheet; A shaft hole damage area acquisition module, which is configured to acquire the shaft hole damage area of ​​the silicon steel rotor sheet; A non-porous area acquisition module, which is configured to acquire the non-porous area of ​​the silicon steel rotor sheet; The actual iron loss acquisition module is configured to acquire the actual iron loss of the silicon steel rotor sheet according to the tested iron loss, the shaft hole damage area and the non-hole area of ​​the silicon steel rotor sheet.

8. A non-transitory readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the medium-frequency iron loss testing method for silicon steel rotor sheets according to any one of claims 1 to 5 are implemented.

9. A program product comprising instructions, characterized in that When the instruction is executed by the device, the device executes the steps of the medium-frequency iron loss testing method for silicon steel rotor plates as described in any one of claims 1 to 5.

10. A medium frequency iron loss test device for silicon steel rotor sheets, characterized in that: include: A control module, and a collection circuit electrically connected to the control module; The acquisition circuit is connected to the silicon steel rotor sheet, and the acquisition circuit is suitable for obtaining the test iron loss of the silicon steel rotor sheet; The control module is configured to adopt the medium-frequency iron loss test method for silicon steel rotor plates as described in any one of claims 1 to 5 to obtain the actual iron loss of the silicon steel rotor plates based on the test iron loss.

Images