Electromagnetic reversing system of electromagnetic clutch and control method of electromagnetic reversing system

Abstract

The invention discloses an electromagnetic reversing control method for an electromagnetic clutch, relates to the field of new energy power systems, and solves the technical problem that separation or interruption of different power sources cannot be realized due to the fact that a combination part is magnetized after an existing electromagnetic clutch is electrified for a long time. The method comprises the steps that when an electromagnetic reversing controller receives a combination instruction signal of a system controller, working parameters of an electromagnetic clutch are obtained, and the working parameters are analyzed through an electromagnetic field calculation algorithm so as to judge whether the electromagnetic clutch meets the reversing requirement or not. The invention further discloses an electromagnetic reversing control system of the electromagnetic clutch. The separation difficulty of the electromagnetic clutch can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of new energy power systems, and more specifically, to an electromagnetic clutch electromagnetic commutation system and its control method. Background Technology

[0002] In new energy vehicle systems, electromagnetic clutches can be used to transmit power from different power sources in a superimposed manner. However, after prolonged energization, the engagement components of an electromagnetic clutch will become magnetized under the influence of electromagnetic force or field, making the components themselves magnetic. The principle of magnetization is as follows: When a magnetic material is not magnetized, its internal magnetic domains are randomly oriented and do not exhibit magnetism externally. However, when an external magnetic field is applied, these domains gradually align with the direction of the external magnetic field. As the strength of the external magnetic field increases, more and more domains align with the external magnetic field, leading to a gradual increase in the magnetization intensity of the magnetic material. When the external magnetic field strength increases to a certain level, the increase in magnetization intensity slows down, eventually reaching a maximum value, which is the state of saturation magnetization. After saturation magnetization, the remanence and coercivity of the magnetic material are significantly improved. Remanence refers to the magnetism retained by the magnetic material after the external magnetic field is removed, while coercivity is the strength of the reverse magnetic field required to reduce the magnetization intensity of the magnetic material to zero. If the component itself is magnetic, it will cause difficulties in separating the magnetized component when the electromagnetic clutch is disengaged, making it impossible to separate or interrupt different power sources. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing an electromagnetic clutch electromagnetic reversing system and its control method, thereby solving the technical problem that the engagement components of the existing electromagnetic clutch become magnetized after a long period of energization, thus failing to achieve separation or interruption of different power sources.

[0004] The present invention discloses an electromagnetic clutch electromagnetic commutation control method, wherein when the electromagnetic commutation controller receives the engagement command signal from the system controller, it acquires the operating parameters of the electromagnetic clutch, and analyzes the operating parameters through an electromagnetic field calculation algorithm to determine whether the electromagnetic clutch meets the commutation requirements.

[0005] To further improve the method, the electromagnetic field calculation algorithm includes an electromagnetic field intensity magnetization calculation algorithm, a magnetic field accumulation time algorithm, and a magnetic field accumulation count calculation algorithm. When analyzing the working parameters using the electromagnetic field calculation algorithm, a calculation algorithm is selected from the electromagnetic field intensity magnetization calculation algorithm, magnetic field accumulation time algorithm, and magnetic field accumulation count calculation algorithm through calibration to analyze the working parameters.

[0006] Furthermore, the method for selecting a calculation algorithm from the electromagnetic field strength magnetization calculation algorithm, the magnetic field accumulation time algorithm, and the magnetic field accumulation count calculation algorithm through the aforementioned calibration is as follows:

[0007] The electromagnetic field strength magnetization calculation algorithm, the magnetic field accumulation time algorithm, and the magnetic field accumulation count calculation algorithm are selected as the calculation algorithm for analyzing the working parameters. Alternatively, a calculation algorithm can be selected that combines the electromagnetic field strength magnetization calculation algorithm with either the magnetic field accumulation time algorithm or the magnetic field accumulation count calculation algorithm to analyze the working parameters; and when analyzing the working parameters, the electromagnetic field strength magnetization calculation algorithm is executed first, and if the judgment result is that the electromagnetic clutch reversing requirements are not met, the other calculation algorithm is executed.

[0008] Furthermore, the electromagnetic field strength magnetization calculation algorithm is as follows: the working parameters of the electromagnetic clutch include magnetic induction intensity, magnetic circuit length, number of turns of electromagnetic coil, electromagnetic coil current, electromagnetic induction intensity saturation value of the teeth on the engagement end face of the electromagnetic clutch, electromagnetic induction intensity saturation coefficient, and temperature conversion coefficient of the magnetic field. The magnetic field strength generated by the electromagnetic coil is calculated based on the magnetic induction intensity, magnetic circuit length, number of turns of the electromagnetic coil, and electromagnetic coil current. The electromagnetic induction intensity saturation value is calculated based on the electromagnetic induction intensity saturation value, electromagnetic induction intensity saturation coefficient, and temperature-to-magnetic field conversion factor of the engagement end face teeth of the electromagnetic clutch. The magnetic field strength generated by the electromagnetic coil is compared with the electromagnetic induction intensity saturation value. When the magnetic field strength generated by the electromagnetic coil is greater than the electromagnetic induction intensity saturation value, it is determined that the commutation requirement of the electromagnetic clutch is met.

[0009] Furthermore, the expression for the magnetic field strength generated by the electromagnetic coil is calculated as follows: ; in, H fe Magnetic flux density l m The length of the magnetic circuit. N The number of turns of the electromagnetic coil. I This represents the current in the electromagnetic coil.

[0010] Furthermore, the expression for the calculated electromagnetic induction intensity saturation value is as follows: ; in, a s This represents the saturation value of electromagnetic induction intensity. B s The electromagnetic induction intensity saturation value is the value of the engagement end face teeth of the electromagnetic clutch.γ The electromagnetic induction intensity saturation coefficient, β This is the conversion factor for temperature versus magnetic field.

[0011] Furthermore, the magnetic field accumulation time algorithm is as follows: the working parameters include the engagement time of the electromagnetic clutch; a time recording period is set; the engagement time in one time recording period is obtained; the engagement time in this time recording period is added to the engagement time in the previous time recording period to obtain the total engagement accumulation time T; and a theoretical magnetization saturation time accumulation value T is set. s The combined total time T and the accumulated theoretical magnetization saturation time T are used to... s In contrast, when the total accumulated time T is greater than the theoretical accumulated magnetization saturation time T... s If the electromagnetic clutch reversal requirement is met, then it is determined that the reversal requirement is satisfied.

[0012] Furthermore, the algorithm for accumulating the magnetic field count is as follows: the operating parameters include the number of engagements of the electromagnetic clutch; a count recording period is set; the number of engagements within one count recording period is obtained; the number of engagements within that count recording period is accumulated to obtain the sum of engagements within that count recording period; this sum of engagements within the count recording period is added to the sum of engagements in the previous count recording period to obtain the total number of engagements n; and a theoretical cumulative value n for the number of times magnetization saturation is set. s The sum of the number of combinations n is compared with the cumulative value of the theoretical magnetization saturation number n. s In comparison, when the total number of combinations n is greater than the theoretical cumulative number of magnetization saturation counts n... s If the electromagnetic clutch reversal requirement is met, then it is determined that the reversal requirement is satisfied.

[0013] Furthermore, the engagement state of the electromagnetic clutch includes a first current flow state and a second current flow state. In the first current flow state, current flows into the first terminal of the electromagnetic coil and flows out from the second terminal of the electromagnetic coil. In the second current flow state, current flows into the second terminal of the electromagnetic coil and flows out from the first terminal of the electromagnetic coil. When it is determined that the electromagnetic clutch commutation requirement is met, the initial state of the current flow direction is obtained. When the initial state is the first current flow direction state, the first current flow direction state is switched to the second current flow direction state; when the initial state is the second current flow direction state, the second current flow direction state is switched back to the first current flow direction state.

[0014] An electromagnetic clutch and electromagnetic commutation system, the system comprising, The system controller is used to output operating command signals for the electromagnetic clutch; An electromagnetic commutation controller is used to receive the operation command signal, analyze the working parameters of the electromagnetic clutch using the aforementioned electromagnetic clutch commutation control method, and perform electromagnetic commutation operation based on the analysis results.

[0015] Beneficial effects The advantages of this invention are: This invention acquires the operating parameters of the electromagnetic clutch when the electromagnetic commutation controller receives the engagement command signal from the system controller. It then analyzes these parameters using electromagnetic field calculation algorithms, including algorithms for calculating electromagnetic field strength magnetization, magnetic field accumulation time, and magnetic field accumulation counts, to determine whether the electromagnetic clutch meets the commutation requirements. This effectively reduces the difficulty of disengaging the electromagnetic clutch. Based on the existing magnetic field, the invention performs a switching of the S / N poles of the magnetic field. Under the existing magnetic field conditions, a reverse magnetic field strength is applied in a timely manner to overcome the coercive force of the original magnetic field, reducing or eliminating the original magnetized magnetic field strength, thereby achieving smooth disengagement of the electromagnetic clutch and realizing the separation or interruption of different power sources. Attached Figure Description

[0016] Figure 1 This is a simplified flowchart of the electromagnetic clutch electromagnetic commutation control method of the present invention; Figure 2 This is a flowchart of an embodiment of the calibration method in the electromagnetic clutch electromagnetic commutation control method of the present invention; Figure 3 This is a flowchart of Embodiment 2 of the calibration method in the electromagnetic clutch electromagnetic commutation control method of the present invention; Figure 4 This is a simplified structural diagram of the electromagnetic clutch and electromagnetic commutation control system of the present invention; Figure 5 This is a schematic diagram illustrating the electromagnetic commutation operation of the electromagnetic coil of the electromagnetic clutch of the present invention.

[0017] Wherein: 1-System controller, 2-Low-voltage battery, 3-Electromagnetic commutation controller, 4-Engine, 5-Electromagnetic clutch, 6-Drive motor, 7-First terminal of the electromagnetic coil of the electromagnetic clutch, 8-Second terminal of the electromagnetic coil of the electromagnetic clutch. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0019] See Figures 1-5 The present invention provides an electromagnetic clutch electromagnetic commutation control method, such as... Figure 1As shown, the method is as follows: when the electromagnetic commutation controller 3 receives the engagement command signal from the system controller 1, and the electromagnetic clutch 5 is engaged and receives the engagement signal fed back by the electromagnetic clutch 5, the operating parameters of the electromagnetic clutch 5 are obtained, and the operating parameters are analyzed by the electromagnetic field calculation algorithm to determine whether the electromagnetic clutch 5 meets the commutation requirements.

[0020] The electromagnetic field calculation algorithm includes an electromagnetic field intensity magnetization calculation algorithm, a magnetic field accumulation time algorithm, and a magnetic field accumulation count calculation algorithm. When analyzing the working parameters using the electromagnetic field calculation algorithm, a calculation algorithm is selected from the electromagnetic field intensity magnetization calculation algorithm, magnetic field accumulation time algorithm, and magnetic field accumulation count calculation algorithm through calibration to analyze the working parameters.

[0021] The operating parameters of the electromagnetic clutch 5 include magnetic induction intensity, magnetic circuit length, number of turns of the electromagnetic coil and electromagnetic coil current, electromagnetic induction intensity saturation value of the teeth on the engagement end face of the electromagnetic clutch, electromagnetic induction intensity saturation coefficient, temperature conversion factor for magnetic field, engagement time of the electromagnetic clutch 5 and number of engagements of the electromagnetic clutch.

[0022] Electromagnetic field strength magnetization calculation algorithm: When the electromagnetic commutation controller 3 (CCU) receives the engagement command signal from the system controller 1 (HCU), and the electromagnetic clutch 5 is engaged and receives the engagement signal from the electromagnetic clutch 5, the electromagnetic commutation controller 3 begins to calculate the magnetic field strength generated by the electromagnetic coil. The formula for the induced magnetic field strength is: ;in, H fe Magnetic flux density l m The length of the magnetic circuit. N The number of turns of the electromagnetic coil. I Let be the current in the electromagnetic coil. The expression for the saturation value of electromagnetic induction intensity is: ;in ，a s This represents the saturation value of electromagnetic induction intensity. B s The electromagnetic induction intensity saturation value is the value of the engagement end face teeth of the electromagnetic clutch. γ The electromagnetic induction intensity saturation coefficient, β This is the temperature-to-magnetic-field conversion factor. When At this time, the battery commutation controller 3 controls the first terminal 7 and the second terminal 8 of the electromagnetic coil to switch the current flow direction; otherwise, the switching is not performed.

[0023] like Figure 5As shown, the engagement state of the electromagnetic clutch 5 includes a first current flow state and a second current flow state. In the first current flow state, current flows into the electromagnetic coil from the first terminal 7 and out from the second terminal 8. In the second current flow state, current flows into the electromagnetic coil from the second terminal 8 and out from the first terminal 7. When the commutation requirement of the electromagnetic clutch 5 is met, the initial state of the current flow is obtained. If the initial state is the first current flow state, the first current flow state is switched to the second current flow state; if the initial state is the second current flow state, the second current flow state is switched back to the first current flow state.

[0024] The following is a detailed implementation of the electromagnetic reversal: If the previous engagement state was such that the current flowed from the first terminal 7 of the electromagnetic coil and flowed out from the second terminal 8, and the electromagnetic strength judgment condition was met, the current direction would switch from flowing into the first terminal 7 to flowing into the second terminal 8 and out of the second terminal 8, and then back to flowing out of the first terminal 7. If the previous engagement state was such that the current flowed from the second terminal 8 to the first terminal 7, and the electromagnetic strength judgment condition was met, the current direction would switch from flowing into the second terminal 8 to flowing into the first terminal 7 and out of the second terminal 7, and then back to flowing out of the second terminal 8. Note: The electromagnetic strength judgment condition is only applied before the electromagnetic clutch engages, during the preparation for engagement. If the condition is met, a reversal is performed; if not, no reversal is performed. If the condition is met during the electromagnetic strength change after a single engagement, no reversal is performed, and the current direction remains the same. The magnetic field strength will be recalculated and judged for the next engagement.

[0025] Magnetic field accumulation time algorithm: Set a time recording period, obtain the binding time in one time recording period, and accumulate the binding time in this time recording period with the binding time in the previous time recording period to obtain the total accumulated binding time T. Set the theoretical accumulated value of magnetization saturation time T. s This will combine the total accumulated time T and the accumulated theoretical magnetization saturation time T. s In comparison, when the combined total time T is greater than the theoretical cumulative magnetization saturation time T... s If the condition is met, then the reversing requirements of the electromagnetic clutch 5 are satisfied.

[0026] Specifically, when the electromagnetic commutation controller 3 receives the engagement command signal from the system controller 1, and after the electromagnetic clutch engages and receives the engagement signal from the electromagnetic clutch, the system begins to record and accumulate the engagement time of the electromagnetic clutch. This accumulation continues until the electromagnetic clutch disengages, at which point the engagement time accumulation stops. The engagement time t1 of this single instance is added to the total accumulated time T of the previous engagement time. If the total accumulated engagement time T is greater than the calibrated theoretical magnetization saturation time accumulation value T... S At this time, the battery commutation controller 3 controls the first terminal 7,2 of the electromagnetic coil to reverse the current flow direction; otherwise, the reversal is not performed.

[0027] If the previous engagement state was such that the current flowed into the second terminal 8 of the electromagnetic coil and out of the first terminal 7, and the electromagnetic strength judgment condition was met, then the current flow direction would switch from the original second terminal 8 to the first terminal 7, and from the original first terminal 7 to the second terminal 8. If the previous engagement state was such that the current flowed into the first terminal 7 and out of the second terminal 8, and the electromagnetic strength judgment condition was met, then the current flow direction would switch from the original first terminal 7 to the second terminal 8, and from the original second terminal 8 to the first terminal 7. Note: The time judgment condition is only applied before the electromagnetic clutch engages. If the condition is met, the current is swapped; if not, the swap is not performed. If the time judgment condition is met during the time accumulation process after a single engagement, the swapping action is not performed. If the previous state maintains the original terminal current flow direction, the next accumulation time T needs to be recalculated and judged.

[0028] Magnetic field accumulation count calculation algorithm: Set a count recording period, obtain the number of combinations within a count recording period, accumulate the number of combinations within that period to obtain the sum of the number of combinations within that period, add this sum of the number of combinations within the previous count recording period to obtain the total number of combinations n, and set the theoretical cumulative value of magnetization saturation count n. s The sum of the number of times n is combined with the cumulative number of theoretical magnetization saturation times n s In contrast, when the total number of combinations n is greater than the theoretical cumulative number of magnetization saturation counts n... s If the condition is met, then the reversing requirements of the electromagnetic clutch 5 are satisfied.

[0029] Specifically, when the electromagnetic commutation controller 3 receives the engagement command signal from the system controller 1, and after the electromagnetic clutch engages and receives the engagement signal from the electromagnetic clutch, the system begins to record and accumulate the number of engagements of the electromagnetic clutch. This single engagement is added to the total number of engagements n from the previous engagement. If the total number of engagements n is greater than the calibrated theoretical cumulative value of magnetization saturation count n... S At this time, the battery commutation controller 3 controls the first terminal 7,2 of the electromagnetic coil to reverse the current flow direction; otherwise, the reversal is not performed.

[0030] If the previous connection state was such that the current flowed into the first terminal 7 of the electromagnetic coil and flowed out of the second terminal 8 of the electromagnetic coil, then the cumulative connection count judgment condition is met. At this time, the current flow direction changes from the original first terminal 7 of the electromagnetic coil to the second terminal 8 of the electromagnetic coil, and then back to the first terminal 7 of the electromagnetic coil. If the previous connection state was such that the current flowed into the second terminal 8 of the electromagnetic coil and flowed out of the first terminal 7 of the electromagnetic coil, then the electromagnetic strength judgment condition is met. At this time, the current flow direction changes from the original second terminal 8 of the electromagnetic coil to the first terminal 7 of the electromagnetic coil, and then back to the second terminal 8 of the electromagnetic coil.

[0031] The above-mentioned electromagnetic reversal operation can effectively reduce the difficulty of disengaging the electromagnetic clutch; based on the original magnetic field, the S / N poles of the magnetic field are switched. Under the original magnetic field conditions, a reverse magnetic field strength is applied in a timely manner to overcome the coercive force of the original magnetic field, so that the original magnetized magnetic field strength is reduced or zero, thereby achieving the smooth disengagement of the electromagnetic clutch and realizing the separation or interruption of different power sources.

[0032] The present invention provides embodiments of the following two calibration methods, from which the calculation algorithm can be selected to analyze the working parameters: electromagnetic field strength magnetization calculation algorithm, magnetic field accumulation time algorithm, and magnetic field accumulation count calculation algorithm.

[0033] like Figure 2 As shown in Example 1: Select any one of the following algorithms for calculating electromagnetic field strength magnetization, magnetic field accumulation time, and magnetic field accumulation count as the calculation algorithm to analyze the working parameters. The execution order is parallel. If the judgment condition of one of the algorithms is met, the electromagnetic reversal action can be executed directly without checking the judgment conditions in the remaining algorithms.

[0034] like Figure 3As shown in Example 2, a calculation algorithm is used to analyze the working parameters by combining either the electromagnetic field strength magnetization calculation algorithm with the magnetic field accumulation time algorithm or the magnetic field accumulation count calculation algorithm. When analyzing the working parameters, the electromagnetic field strength magnetization calculation algorithm is executed first, and if the result indicates that the electromagnetic clutch commutation requirements are not met, the other calculation algorithm is executed. The magnetic field accumulation time algorithm and the magnetic field accumulation count calculation algorithm are used in parallel; if either one is satisfied, the electromagnetic commutation action is initiated; otherwise, commutation does not occur.

[0035] like Figure 4 As shown, an electromagnetic clutch electromagnetic commutation system includes, System controller 1 is used to output operation command signals for electromagnetic clutch 5. The operation command signals include engagement commands and disengagement commands.

[0036] The electromagnetic commutation controller 3 is used to receive the operation command signal of the electromagnetic clutch 5 and apply the above-mentioned electromagnetic clutch electromagnetic commutation control method to analyze the working parameters of the electromagnetic clutch 5 and perform electromagnetic commutation operation according to the analysis results so that the electromagnetic clutch 5 can be smoothly disengaged.

[0037] The system also includes a low-voltage battery 2, which is electrically connected to the system controller 1 and the electromagnetic commutation controller 3. The electromagnetic commutation controller 3 is connected to the first terminal 7 and the second terminal 8 of the electromagnetic coil of the electromagnetic clutch 5.

[0038] System controller 1 is connected to the control components of electromagnetic commutation controller 3 via a low-voltage communication line. System controller 1 sends control signals for engaging and disengaging electromagnetic clutch 5 and receives status feedback signals.

[0039] The electromagnetic commutation controller 3 receives the engagement and disengagement commands from the system controller 1, and determines the connection method of the electromagnetic coil terminals in the electromagnetic clutch based on its internal algorithm logic.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for controlling the electromagnetic commutation of an electromagnetic clutch, characterized in that, The method is as follows: when the electromagnetic commutation controller (3) receives the engagement command signal from the system controller (1), it obtains the working parameters of the electromagnetic clutch (5) and analyzes the working parameters through an electromagnetic field calculation algorithm to determine whether the electromagnetic clutch (5) meets the commutation requirements.

2. The electromagnetic commutation control method for an electromagnetic clutch according to claim 1, characterized in that, The electromagnetic field calculation algorithm includes an electromagnetic field intensity magnetization calculation algorithm, a magnetic field accumulation time algorithm, and a magnetic field accumulation count calculation algorithm. When analyzing the working parameters using the electromagnetic field calculation algorithm, a calculation algorithm is selected from the electromagnetic field intensity magnetization calculation algorithm, magnetic field accumulation time algorithm, and magnetic field accumulation count calculation algorithm through calibration to analyze the working parameters.

3. The electromagnetic commutation control method for an electromagnetic clutch according to claim 1, characterized in that, The method for selecting a calculation algorithm from the electromagnetic field strength magnetization calculation algorithm, the magnetic field accumulation time algorithm, and the magnetic field accumulation count calculation algorithm through the aforementioned calibration is as follows: The electromagnetic field strength magnetization calculation algorithm, the magnetic field accumulation time algorithm, and the magnetic field accumulation count calculation algorithm are selected as the calculation algorithm for analyzing the working parameters. Alternatively, a calculation algorithm can be selected that combines the electromagnetic field strength magnetization calculation algorithm with either the magnetic field accumulation time algorithm or the magnetic field accumulation count calculation algorithm to analyze the working parameters; and when analyzing the working parameters, the electromagnetic field strength magnetization calculation algorithm is executed first, and if the judgment result is that the electromagnetic clutch reversing requirements are not met, the other calculation algorithm is executed.

4. The electromagnetic commutation control method for an electromagnetic clutch according to claim 1, characterized in that, The electromagnetic field strength magnetization calculation algorithm is as follows: the working parameters of the electromagnetic clutch (5) include magnetic induction intensity, magnetic circuit length, number of turns of electromagnetic coil, electromagnetic coil current, electromagnetic induction intensity saturation value of the teeth on the engagement end face of the electromagnetic clutch, electromagnetic induction intensity saturation coefficient and temperature conversion coefficient of magnetic field. The magnetic field strength generated by the electromagnetic coil is calculated based on the magnetic induction intensity, magnetic circuit length, number of turns of the electromagnetic coil, and electromagnetic coil current. The electromagnetic induction intensity saturation value is calculated based on the electromagnetic induction intensity saturation value, electromagnetic induction intensity saturation coefficient and temperature-to-magnetic field conversion coefficient of the electromagnetic clutch engagement end face teeth. The magnetic field strength generated by the electromagnetic coil is compared with the electromagnetic induction intensity saturation value. When the magnetic field strength generated by the electromagnetic coil is greater than the electromagnetic induction intensity saturation value, it is determined that the reversing requirement of the electromagnetic clutch (5) is met.

5. The electromagnetic commutation control method for an electromagnetic clutch according to claim 4, characterized in that, The expression for the magnetic field strength generated by the electromagnetic coil is as follows: ； in, H fe Magnetic flux density l m The length of the magnetic circuit. N The number of turns of the electromagnetic coil. I This represents the current in the electromagnetic coil.

6. The electromagnetic commutation control method for an electromagnetic clutch according to claim 4, characterized in that, The expression for calculating the saturation value of the electromagnetic induction intensity is as follows: ； in, a s This represents the saturation value of electromagnetic induction intensity. B s The electromagnetic induction intensity saturation value is the value of the engagement end face teeth of the electromagnetic clutch. γ The electromagnetic induction intensity saturation coefficient, β This is the conversion factor for temperature versus magnetic field.

7. The electromagnetic commutation control method for an electromagnetic clutch according to claim 1, characterized in that, The magnetic field accumulation time algorithm is as follows: the working parameters include the engagement time of the electromagnetic clutch (5), a time recording period is set, the engagement time in one time recording period is obtained, the engagement time in the time recording period is accumulated with the engagement time in the previous time recording period to obtain the total engagement accumulation time T, and the theoretical magnetization saturation time accumulation value T is set. s The combined total time T and the accumulated theoretical magnetization saturation time T are used to... s In contrast, when the total accumulated time T is greater than the theoretical accumulated magnetization saturation time T... s If the electromagnetic clutch (5) is in use, then the reversing requirement is satisfied.

8. The electromagnetic commutation control method for an electromagnetic clutch according to claim 1, characterized in that, The algorithm for accumulating the magnetic field count is as follows: the working parameters include the engagement count of the electromagnetic clutch (5), a count recording period is set, the engagement count in one count recording period is obtained, the engagement count in the count recording period is accumulated to obtain the sum of the engagement counts in the count recording period, the sum of the engagement counts in the count recording period is added to the sum of the engagement counts in the previous count recording period to obtain the total engagement count n, and the theoretical cumulative value of the magnetic saturation count n is set. s The sum of the number of combinations n is compared with the cumulative value of the theoretical magnetization saturation number n. s In comparison, when the total number of combinations n is greater than the theoretical cumulative number of magnetization saturation counts n... s If the electromagnetic clutch (5) is in use, then the reversing requirement is satisfied.

9. The electromagnetic commutation control method for an electromagnetic clutch according to claim 1, characterized in that, The engagement state of the electromagnetic clutch includes a first current flow state and a second current flow state. In the first current flow state, the current flows in from the first terminal (7) of the electromagnetic coil and flows out from the second terminal (8) of the electromagnetic coil. In the second current flow state, the current flows in from the second terminal (8) of the electromagnetic coil and flows out from the first terminal (7) of the electromagnetic coil. When it is determined that the commutation requirement of the electromagnetic clutch (5) is met, the initial state of the current flow direction is obtained. When the initial state is the first current flow direction state, the first current flow direction state is switched to the second current flow direction state; when the initial state is the second current flow direction state, the second current flow direction state is switched to the first current flow direction state.

10. An electromagnetic clutch and electromagnetic commutation system, characterized in that, The system includes, The system controller (1) is used to output the operation command signal of the electromagnetic clutch (5); The electromagnetic commutation controller (3) is used to receive the operation command signal and apply the electromagnetic commutation control method of the electromagnetic clutch according to any one of claims 1-9 to analyze the working parameters of the electromagnetic clutch (5) and perform electromagnetic commutation operation according to the analysis results.

Images