CN114970091B - Electromagnetic compatibility analysis design method for high-density magnetic wafer coil array - Google Patents
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Abstract
本发明涉及一种高密度磁晶圆线圈阵列电磁兼容性分析设计方法。所提供的方法中，采用的单台设备表面贴附有阵列式排布的单磁晶圆线圈，本方法包括以下步骤：先对设备自兼容状况进行预测分析与评估；然后对于单台设备存在潜在干扰的收发对，采用屏蔽、滤波、接地、隔离等措施进行设计。多台设备时，先对单台设备进行分析，然后对设备间的电磁兼容状况进行预测分析与评估，最后对于设备间存在潜在干扰的收发对，采用屏蔽、滤波、接地、隔离等措施进行设计。实现了磁耦合设备的自兼容预测分析，实现了磁耦合取能和通信系统的电磁兼容性设计，可解决设备自身以及设备间电磁的干扰问题，为磁耦合取能和通信系统的电磁兼容性设计奠定技术基础。
The present invention relates to a method for analyzing and designing the electromagnetic compatibility of a high-density magnetic wafer coil array. In the provided method, a single device is attached with a single magnetic wafer coil arranged in an array on its surface. The method comprises the following steps: firstly, predicting, analyzing and evaluating the self-compatibility of the device; then, for the transceiver pairs with potential interference in the single device, shielding, filtering, grounding, isolation and other measures are adopted for design. When there are multiple devices, firstly analyze the single device, then predict and analyze the electromagnetic compatibility between the devices, and finally, shielding, filtering, grounding, isolation and other measures are adopted for design. The self-compatibility prediction analysis of magnetic coupling devices is realized, and the electromagnetic compatibility design of magnetic coupling energy extraction and communication systems is realized, which can solve the electromagnetic interference problems of the device itself and between devices, and lay a technical foundation for the electromagnetic compatibility design of magnetic coupling energy extraction and communication systems.
Description
技术领域Technical Field
本发明专利属于电磁兼容设计领域，主要涉及设备/分系统的电磁兼容性设计方法，具体涉及一种高密度磁晶圆线圈阵列电磁兼容性分析设计方法。The invention patent belongs to the field of electromagnetic compatibility design, mainly involving electromagnetic compatibility design methods of equipment/subsystems, and specifically involves an electromagnetic compatibility analysis and design method for a high-density magnetic wafer coil array.
背景技术Background technique
随着电力电子系统日益集成化、模块化和智能化，无线取能和通信已成为系统设计的新趋势。在无线取能和通信的实现技术中，磁耦合技术具有稳定、能耗低、抗电干扰能力强等优势，已在无线供电、水下通信等领域得到了广泛应用。With the increasing integration, modularization and intelligence of power electronic systems, wireless energy harvesting and communication have become a new trend in system design. Among the technologies for implementing wireless energy harvesting and communication, magnetic coupling technology has the advantages of stability, low energy consumption, and strong anti-electrical interference ability, and has been widely used in the fields of wireless power supply and underwater communication.
磁晶圆线圈阵列是一种能够同时实现无线取能和通信的磁耦合技术系统，在装备设计领域尤其是无缆化方面具有广阔的应用前景。磁晶圆线圈阵列由多个单磁晶圆线圈均匀排列组成高密度阵列，并形成磁晶圆线圈连接网络，每个磁晶圆线圈由线圈和TMR传感器组成。磁晶圆线圈阵列作为磁连接接口，替代了传统的电缆接口以实现能量和信号传输。The magnetic wafer coil array is a magnetic coupling technology system that can achieve wireless energy harvesting and communication at the same time. It has broad application prospects in the field of equipment design, especially in the field of cable-free. The magnetic wafer coil array consists of multiple single magnetic wafer coils evenly arranged in a high-density array, forming a magnetic wafer coil connection network. Each magnetic wafer coil consists of a coil and a TMR sensor. The magnetic wafer coil array serves as a magnetic connection interface, replacing the traditional cable interface to achieve energy and signal transmission.
由于磁晶圆线圈阵列采用磁场作为信息和能量传输载体，因此具有较强的抗电干扰能力。磁耦合取能和通信系统仅在无线供电、水下通信等少数领域进行了应用，该类系统缺乏专业的电磁兼容性设计方法。国家标准《GB/T 37132-2018无线充电设备的电磁兼容性通用要求和测试方法》规定了无线充电设备的电磁兼容性设计依据，但并无相应的设计方法，而磁耦合通信系统更是缺乏电磁兼容性要求。高密度磁晶圆线圈阵列工作模式下，磁晶圆线圈阵列上配置的设备存在着以下的问题：一、设备内部模块发射的电磁干扰信号通过其配置磁晶圆线圈间的磁感应耦合被自身其它模块接收，引发设备自兼容问题；二、高密度磁晶圆线圈阵列的单元间存在明显的磁场谐振耦合，单台设备发射的电磁干扰信号可通过磁晶圆线圈互耦进入磁晶圆线圈网络，进而影响其它设备的正常工作，引发设备间电磁干扰问题；三、高密度磁晶圆线圈阵列的设备与设备间近距离布设，设备间通过壳体—壳体耦合会形成明显的辐射干扰。因此，包含有高密度磁晶圆线圈阵列的设备有特殊的电磁干扰形成机理，研究其电磁兼容性分析设计方法对于保障设备间兼容工作具有重要意义。Since the magnetic wafer coil array uses magnetic field as the carrier of information and energy transmission, it has strong anti-electric interference ability. Magnetic coupling energy harvesting and communication systems have only been applied in a few fields such as wireless power supply and underwater communication. Such systems lack professional electromagnetic compatibility design methods. The national standard "GB/T 37132-2018 General Requirements and Test Methods for Electromagnetic Compatibility of Wireless Charging Equipment" stipulates the electromagnetic compatibility design basis of wireless charging equipment, but there is no corresponding design method, and the magnetic coupling communication system lacks electromagnetic compatibility requirements. In the working mode of high-density magnetic wafer coil array, the devices configured on the magnetic wafer coil array have the following problems: 1. The electromagnetic interference signal emitted by the internal module of the device is received by other modules through the magnetic induction coupling between the magnetic wafer coils configured, causing the self-compatibility problem of the device; 2. There is obvious magnetic field resonance coupling between the units of the high-density magnetic wafer coil array. The electromagnetic interference signal emitted by a single device can enter the magnetic wafer coil network through the mutual coupling of the magnetic wafer coil, thereby affecting the normal operation of other devices and causing electromagnetic interference problems between devices; 3. The devices of the high-density magnetic wafer coil array are arranged in close proximity, and the shell-shell coupling between the devices will form obvious radiation interference. Therefore, the device containing the high-density magnetic wafer coil array has a special electromagnetic interference formation mechanism. Studying its electromagnetic compatibility analysis and design method is of great significance to ensure the compatibility between devices.
目前，电磁兼容设计方法主要有问题解决法、标准规范法和预测分析法。针对设备/分系统电磁兼容设计问题，主要的技术有屏蔽、滤波和接地等。以上方法和技术针对有缆系统，不能对无线取能和通信系统电磁兼容性设计提供技术支持。At present, the main electromagnetic compatibility design methods include problem solving, standard specification and predictive analysis. For the electromagnetic compatibility design of equipment/subsystems, the main technologies include shielding, filtering and grounding. The above methods and technologies are aimed at cable systems and cannot provide technical support for the electromagnetic compatibility design of wireless energy collection and communication systems.
发明内容Summary of the invention
本发明的目的是针对磁耦合取能和通信系统的电磁兼容设计需求，提供一种高密度磁晶圆线圈阵列电磁兼容性分析设计方法。The purpose of the present invention is to provide a high-density magnetic wafer coil array electromagnetic compatibility analysis and design method for electromagnetic compatibility design requirements of magnetic coupling energy harvesting and communication systems.
本发明提供一种高密度磁晶圆线圈阵列电磁兼容性分析设计方法，其特征在于：所采用的单台设备表面贴附有阵列式排布的单磁晶圆线圈；The present invention provides a high-density magnetic wafer coil array electromagnetic compatibility analysis and design method, which is characterized by: the surface of the single device used is attached with single magnetic wafer coils arranged in an array;
本方法中定义单磁晶圆线圈为磁端口，将高密度磁晶圆线圈矩阵等效为多端口网络，仿真各端口间的耦合度，建立网络的磁耦合关联矩阵；所述方法包含以下步骤：In this method, a single magnetic wafer coil is defined as a magnetic port, a high-density magnetic wafer coil matrix is equivalent to a multi-port network, the coupling degree between each port is simulated, and a magnetic coupling correlation matrix of the network is established; the method comprises the following steps:
1)对设备自兼容状况进行预测分析与评估1) Predictive analysis and evaluation of equipment self-compatibility
1.1建立设备自干扰预测方程：假定设备共有M1个磁发射端口，有M2个磁接收端口，则第i个接收端口接收到的总干扰功率为1.1 Establish the device self-interference prediction equation: Assuming that the device has M1 magnetic transmitting ports and M2 magnetic receiving ports, the total interference power received by the i-th receiving port is
其中为设备第j个磁发射端口的干扰功率谱函数；Tij(f)为从第j个磁发射端口耦合到第i个磁接收端口的耦合传递函数；Pi R(f) 为敏感度阈值；in is the interference power spectrum function of the j-th magnetic transmitting port of the device; Tij (f) is the coupling transfer function from the j-th magnetic transmitting port to the i-th magnetic receiving port; PiR (f) is the sensitivity threshold;
1.2确定设备所有磁发射端口的干扰功率函数 1.2 Determine the interference power function of all magnetic transmission ports of the device
1.3构建设备磁耦合关联矩阵，仿真各端口间耦合度，完成关联矩阵元素填充；1.3 Construct the magnetic coupling correlation matrix of the equipment, simulate the coupling degree between each port, and complete the filling of the correlation matrix elements;
1.4根据耦合关联矩阵确定磁耦合传递函数1.4 Determine the magnetic coupling transfer function based on the coupling correlation matrix
Tij(f)＝f(Cij),i＝1,...M2,j＝1,...,M1 Tij (f)=f( Cij ),i=1,...M2,j=1,...,M1
1.5基于设备的设计参数，确定设备所有磁接收端口的敏感度阈值Pi S(f),i＝1,...,M1；1.5 Based on the design parameters of the device, determine the sensitivity thresholds P i S (f), i=1,...,M1 of all magnetic receiving ports of the device;
1.6利用预测方程评估设备自兼容状况：确定设备各接收端口接收到的总干扰功率Pi R(f)，将Pi S(f)与Pi R(f)相比较转化为dB形式 1.6 Use the prediction equation to evaluate the self-compatibility of the device: Determine the total interference power PiR (f) received by each receiving port of the device, and compare PiS (f) with PiR (f) Convert to dB
将与事先指定的阈值δ相比较，若则该端口不被干扰；若则该端口被干扰，若则处于临近干扰状态，以此为依据，确定所有潜在的干扰收发对；Will Compared with the pre-specified threshold δ, if The port is not disturbed; if If the port is disturbed, It is in a state of adjacent interference, and based on this, all potential interfering transceiver pairs are determined;
2)对于单台设备存在潜在干扰的收发对，基于电磁兼容三要素，针对性地采用屏蔽、滤波、接地、隔离等措施进行设计。2) For the transceiver pairs with potential interference in a single device, shielding, filtering, grounding, isolation and other measures are used in the design based on the three elements of electromagnetic compatibility.
上述步骤1中，1.3是以端口间的耦合度C为元素构建耦合关联矩阵：In the above step 1, 1.3 is to construct a coupling correlation matrix with the coupling degree C between ports as the element:
上述设备包括多台时，定义壳体为电端口，仿真各设备壳体—壳体耦合，建立设备间的电耦合关联矩阵；所述方法还包括When the above-mentioned device includes multiple devices, the shell is defined as an electrical port, the shell-shell coupling of each device is simulated, and the electrical coupling association matrix between the devices is established; the method also includes
步骤3)对设备间的电磁兼容状况进行预测分析与评估，其步骤是：Step 3) Predict, analyze and evaluate the electromagnetic compatibility between devices. The steps are:
3.1建立设备间电磁兼容性预测方程：假定磁晶圆线圈阵列上共布设了P个设备，这些设备总共包含M1个磁发射端口，M2个磁接收端口，包含N1个电发射端口，N2个电接收端口，则第i个电接收端口接收到的总干扰功率为3.1 Establish the electromagnetic compatibility prediction equation between devices: Assuming that there are P devices arranged on the magnetic wafer coil array, these devices contain M1 magnetic transmitting ports, M2 magnetic receiving ports, N1 electrical transmitting ports, and N2 electrical receiving ports, then the total interference power received by the i-th electrical receiving port is
其中为第j个设备从壳体端口发射的干扰功率函数；为从第j个设备的壳体端口耦合到第i个设备壳体端口的耦合传递函数in is the interference power function emitted by the jth device from the housing port; is the coupling transfer function from the housing port of the jth device to the housing port of the ith device
设备组合的第i个磁接收端口接收到的总干扰功率为The total interference power received by the i-th magnetic receiving port of the device combination is
其中为设备组合第j个磁发射端口的干扰功率函数；为从第j个磁发射端口耦合到第i个磁接收端口的耦合传递函数。in is the interference power function of the jth magnetic transmission port of the device combination; is the coupling transfer function from the jth magnetic transmitting port to the i-th magnetic receiving port.
3.2基于设备的设计参数，采用理论计算、仿真分析或测试手段确定设备组合所有磁发射端口的干扰功率函数确定设备组合所有壳体发射端口的干扰功率函数 3.2 Based on the design parameters of the equipment, use theoretical calculation, simulation analysis or testing methods to determine the interference power function of all magnetic transmission ports of the equipment combination Determine the interference power function of all housing transmit ports of the device combination
3.3构建设备组合的磁耦合关联矩阵，仿真关联矩阵中各磁端口间耦合度，完成关联矩阵元素填充；3.3 Construct the magnetic coupling correlation matrix of the equipment combination, simulate the coupling degree between the magnetic ports in the correlation matrix, and complete the filling of the correlation matrix elements;
3.4根据磁耦合关联矩阵确定磁耦合传递函数3.4 Determine the magnetic coupling transfer function based on the magnetic coupling correlation matrix
3.5构建设备间电耦合关联矩阵，仿真关联矩阵中各端口间的壳体—壳体耦合，完成电关联矩阵元素填充；3.5 Construct the electrical coupling association matrix between devices, simulate the shell-shell coupling between each port in the association matrix, and complete the filling of the electrical association matrix elements;
3.6根据电耦合关联矩阵确定电耦合传递函数3.6 Determine the electrical coupling transfer function based on the electrical coupling correlation matrix
3.7基于设备的设计参数，确定设备组合确定设备组合所有磁接收端口的敏感度阈值Pi Sm(f),i＝1,...,M2；确定设备组合所有壳体接收端口的敏感度阈值Pi Se(f),i＝1,...,N2；3.7 Based on the design parameters of the equipment, determine the sensitivity thresholds P i Sm (f), i=1, ..., M2 of all magnetic receiving ports of the equipment combination; determine the sensitivity thresholds P i Se (f), i=1, ..., N2 of all shell receiving ports of the equipment combination;
3.8利用设备间电磁兼容性预测方程评估设备间干扰状况：确定设备各接收端口接收到的总干扰功率Pi Re(f)和Pi Rm(f)，分别与Pi Se(f) 和Pi Sm(f)相比较得到转化为dB形式 3.8 Use the electromagnetic compatibility prediction equation between devices to evaluate the interference status between devices: Determine the total interference power Pi Re (f) and Pi Rm (f) received by each receiving port of the device, and compare them with Pi Se (f) and Pi Sm (f) respectively to obtain Convert to dB
将与事先指定的阈值δ相比较，若则该端口不被干扰；若则该端口被干扰，若则处于临近干扰状态，以此为依据，确定所有潜在的干扰收发对。Will Compared with the pre-specified threshold δ, if The port is not disturbed; if If the port is disturbed, It is in a state of adjacent interference, and based on this, all potential interfering transmit and receive pairs are determined.
4)对于设备间存在潜在干扰的收发对，基于电磁兼容三要素，针对性地采用屏蔽、滤波、接地、隔离等措施进行设计。4) For transceiver pairs with potential interference between devices, shielding, filtering, grounding, isolation and other measures are used in the design based on the three elements of electromagnetic compatibility.
上述步骤3中，3.3是以各端口间的耦合度C为元素构建设备组合的磁耦合关联矩阵：In the above step 3, 3.3 is to construct the magnetic coupling correlation matrix of the device combination with the coupling degree C between each port as the element:
上述步骤3中，3.5是以端口间耦合度C2为元素构建设备间电耦合关联矩阵：In the above step 3, 3.5 is to construct the electrical coupling correlation matrix between devices with the port coupling degree C2 as the element:
与现有技术相比，本发明的优点如下：Compared with the prior art, the advantages of the present invention are as follows:
1、实现了磁耦合设备的自兼容预测分析：配置磁晶圆线圈的设备自兼容问题与有缆设备机理不同，其主要通过磁晶圆线圈间的耦合传递干扰。本发明通过定义“磁端口”，建立端口间的耦合关联矩阵；通过建立设备自兼容预测分析方程实现设备自兼容预测分析，并指导设计。1. Realize the self-compatibility prediction analysis of magnetic coupling equipment: The self-compatibility problem of equipment equipped with magnetic wafer coils is different from that of cabled equipment. It mainly transmits interference through the coupling between magnetic wafer coils. The present invention defines "magnetic ports" and establishes a coupling correlation matrix between ports; realizes the self-compatibility prediction analysis of equipment by establishing equipment self-compatibility prediction analysis equations, and guides the design.
2、实现了磁耦合取能和通信系统的电磁兼容性设计：本发明通过定义“磁端口”和“电端口”，建立端口间的耦合关联矩阵；建立电磁兼容性预测方程，实现高密度磁晶圆线圈阵列的电磁兼容性预测分析，并指导设计。2. The electromagnetic compatibility design of the magnetic coupling energy harvesting and communication system is realized: the present invention defines the "magnetic port" and "electrical port" to establish a coupling correlation matrix between the ports; an electromagnetic compatibility prediction equation is established to realize the electromagnetic compatibility prediction analysis of the high-density magnetic wafer coil array and guide the design.
3、本发明提供了一种高密度磁晶圆线圈阵列的电磁兼容性分析设计方法，不单可以对单个设备进行分析设计，更可以对多台设备进行分析设计，可解决设备自身以及设备间电磁的干扰问题，为磁耦合取能和通信系统的电磁兼容性设计奠定技术基础。3. The present invention provides an electromagnetic compatibility analysis and design method for a high-density magnetic wafer coil array, which can be used not only for analysis and design of a single device, but also for analysis and design of multiple devices. It can solve the electromagnetic interference problems of the device itself and between devices, and lay a technical foundation for the electromagnetic compatibility design of magnetic coupling energy harvesting and communication systems.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是磁晶圆线圈阵列示意图；FIG1 is a schematic diagram of a magnetic wafer coil array;
图2是设备内部模块间的磁干扰示意图；FIG2 is a schematic diagram of magnetic interference between modules inside the device;
图3是设备间电磁干扰示意图；FIG3 is a schematic diagram of electromagnetic interference between devices;
图4是实施例1的设备示意图；FIG4 is a schematic diagram of the equipment of Example 1;
图5a和图5b分别是磁发射端口1和2的干扰功率谱；Figure 5a and Figure 5b are the interference power spectra of magnetic transmission ports 1 and 2, respectively;
图6是端口耦合仿真模型；Fig. 6 is a port coupling simulation model;
图7是各端口间耦合度仿真结果：图7a、图7b、图7c、图7d 分别代表发射端口1到接收端口1、发射端口1到接收端口2、发射端口2到接收端口1、发射端口2到接收端口2的耦合度；FIG7 is a simulation result of coupling between ports: FIG7a, FIG7b, FIG7c, and FIG7d represent the coupling between transmitting port 1 and receiving port 1, transmitting port 1 and receiving port 2, transmitting port 2 and receiving port 1, and transmitting port 2 and receiving port 2, respectively;
图8a和图8b分别是磁接收端口1和2的敏感度；Figure 8a and Figure 8b are the sensitivities of magnetic receiving ports 1 and 2, respectively;
图9是磁两接收端口干扰功率与敏感度比较：图9a是磁接收端口1的敏感度和干扰功率；图9b是磁接收端口2的敏感度和干扰功率；FIG9 is a comparison of interference power and sensitivity of two magnetic receiving ports: FIG9a is the sensitivity and interference power of magnetic receiving port 1; FIG9b is the sensitivity and interference power of magnetic receiving port 2;
图10是实施例2的设备示意图；FIG10 is a schematic diagram of the equipment of Example 2;
图11是磁发射端口1至4的干扰功率谱图：图11a、图11b、图11c、图11d分别代表磁发射端口1、磁发射端口2、磁发射端口3、磁发射端口4的干扰功率谱；FIG11 is a diagram of interference power spectra of magnetic emission ports 1 to 4: FIG11a, FIG11b, FIG11c, and FIG11d represent interference power spectra of magnetic emission port 1, magnetic emission port 2, magnetic emission port 3, and magnetic emission port 4, respectively;
图12是电发射端口1的干扰功率谱；FIG12 is an interference power spectrum of electrical transmitting port 1;
图13是各端口间耦合度仿真结果：图13a、图13b、图13c、图 13d、图13e、图13f、图13g、图13h分别代表发射端口1到接收端口1、发射端口2到接收端口1、发射端口3到接收端口1、发射端口4到接收端口1、发射端口1到接收端口2、发射端口2到接收端口2、发射端口3到接收端口2、发射端口4到接收端口2的耦合度；FIG13 is a simulation result of coupling between ports: FIG13a, FIG13b, FIG13c, FIG13d, FIG13e, FIG13f, FIG13g, and FIG13h represent the coupling between transmitting port 1 and receiving port 1, transmitting port 2 and receiving port 1, transmitting port 3 and receiving port 1, transmitting port 4 and receiving port 1, transmitting port 1 and receiving port 2, transmitting port 2 and receiving port 2, transmitting port 3 and receiving port 2, and transmitting port 4 and receiving port 2, respectively;
图14是电端口间耦合度仿真结果；FIG14 is a simulation result of coupling between electrical ports;
图15a和图15b分别是磁接收端口1和2的敏感度；Figures 15a and 15b are the sensitivities of magnetic receiving ports 1 and 2, respectively;
图16是电接收端口敏感度；Fig. 16 is the electrical receiving port sensitivity;
图17a和图17b分别是磁接收端口1和2的干扰功率与敏感度；FIG17a and FIG17b are interference power and sensitivity of magnetic receiving ports 1 and 2, respectively;
图18是电接收端口干扰功率与敏感度比较。FIG18 is a comparison of interference power and sensitivity of the electrical receiving port.
具体实施方式Detailed ways
下面结合附图和实施例，对本发明进行详细地说明。The present invention is described in detail below with reference to the accompanying drawings and embodiments.
现有的磁晶圆线圈阵列原理如图1所示，它由多个单磁晶圆线圈均匀排列组成高密度阵列，并形成磁晶圆线圈连接网络；每个磁晶圆线圈由线圈和TMR传感器组成，其作为磁连接接口，需要取能或通信的不同设备根据需求配置单个磁晶圆线圈或多个磁晶圆线圈形成对应的组合。The principle of the existing magnetic wafer coil array is shown in Figure 1. It consists of multiple single magnetic wafer coils evenly arranged in a high-density array, and forms a magnetic wafer coil connection network; each magnetic wafer coil consists of a coil and a TMR sensor, which serves as a magnetic connection interface. Different devices that need to obtain energy or communicate configure a single magnetic wafer coil or multiple magnetic wafer coils according to their needs to form a corresponding combination.
高密度磁晶圆线圈阵列工作模式下，一方面设备内部模块发射的电磁干扰信号通过其配置磁晶圆线圈间的磁感应耦合被自身其它模块接收，引发设备自兼容问题，如图2所示；另一方面高密度磁晶圆线圈阵列的单元间存在明显的磁场谐振耦合，单台设备发射的电磁干扰信号可通过晶元间互耦进入磁晶圆线圈网络，进而影响其它设备的正常工作，引发设备间电磁干扰问题。且高密度磁晶圆线圈阵列的设备与设备间近距离布设，设备间通过壳体—壳体耦合形成明显的辐射干扰，如图3所示。In the working mode of high-density magnetic wafer coil array, on the one hand, the electromagnetic interference signal emitted by the module inside the device is received by other modules through the magnetic induction coupling between the configured magnetic wafer coils, causing the self-compatibility problem of the device, as shown in Figure 2; on the other hand, there is obvious magnetic field resonance coupling between the units of the high-density magnetic wafer coil array, and the electromagnetic interference signal emitted by a single device can enter the magnetic wafer coil network through the mutual coupling between wafers, thereby affecting the normal operation of other devices and causing electromagnetic interference problems between devices. In addition, the devices of the high-density magnetic wafer coil array are arranged in close proximity, and obvious radiation interference is formed between the devices through shell-shell coupling, as shown in Figure 3.
本方法的设计原理是：基于电磁干扰三要素建立电磁兼容性预测方程，实现高密度磁晶圆线圈阵列的电磁兼容性预测分析，并指导设计。The design principle of this method is to establish an electromagnetic compatibility prediction equation based on the three elements of electromagnetic interference, realize the electromagnetic compatibility prediction analysis of high-density magnetic wafer coil arrays, and guide the design.
实施例1Example 1
一种高密度磁晶圆线圈阵列电磁兼容性分析设计方法，本方法中定义单磁晶圆线圈为磁端口，具体包括磁发射端口和磁接收端口，将高密度磁晶圆线圈矩阵等效为多端口网络，仿真各端口间的耦合度，建立网络的磁耦合关联矩阵。A method for electromagnetic compatibility analysis and design of a high-density magnetic wafer coil array is proposed. In this method, a single magnetic wafer coil is defined as a magnetic port, specifically including a magnetic transmitting port and a magnetic receiving port. The high-density magnetic wafer coil matrix is equivalent to a multi-port network, the coupling degree between each port is simulated, and the magnetic coupling correlation matrix of the network is established.
本实施例中的设备如图4所示，该设备包含2个磁发射端口和2 个磁接收端口，假设两发射端口传输的信号均为矩形脉冲序列信号，端口1的幅度、周期和脉宽分别为a1＝165V、T1＝5×10-5s、τ1＝3×10-5s，端口2的幅度、周期和脉宽分别为a2＝300V、T2＝5×10- 5s、τ2＝3×10-5s；磁接收端口的灵敏度为带内工作电平减6dB。The device in this embodiment is shown in Figure 4. The device includes two magnetic transmitting ports and two magnetic receiving ports. Assuming that the signals transmitted by the two transmitting ports are rectangular pulse sequence signals, the amplitude, period and pulse width of port 1 are a1 = 165V, T1 = 5× 10-5s , τ1 = 3× 10-5s , respectively, and the amplitude, period and pulse width of port 2 are a2 = 300V, T2 = 5 × 10-5s , τ2 = 3× 10-5s , respectively; the sensitivity of the magnetic receiving port is the in-band working level minus 6dB.
1)对设备自兼容状况进行预测分析与评估1) Predictive analysis and evaluation of equipment self-compatibility
1.1建立设备自干扰预测方程。因设备共有2个磁发射端口和2 个磁接收端口，则第1和第2个接收端口接收到的总干扰功率分别为1.1 Establish the device self-interference prediction equation. Since the device has 2 magnetic transmitting ports and 2 magnetic receiving ports, the total interference power received by the first and second receiving ports are respectively
其中和分别为设备第1和第2个磁发射端口的干扰功率谱函数；T11(f)、T12(f)、T21(f)、T22(f)分别为发射端口1和2对接收端口1和2的干扰传递函数。in and are the interference power spectrum functions of the first and second magnetic transmitting ports of the equipment respectively; T 11 (f), T 12 (f), T 21 (f), and T 22 (f) are the interference transfer functions of transmitting ports 1 and 2 to receiving ports 1 and 2 respectively.
1.2基于设备的设计参数，确定设备两磁发射端口的干扰功率函数和 1.2 Based on the design parameters of the device, determine the interference power function of the two magnetic transmission ports of the device and
本实施例中应用离散傅里叶变换，并进行简化和近似表达得到磁发射端口1和2的干扰功率谱：In this embodiment, discrete Fourier transform is applied, and the interference power spectrum of magnetic transmission ports 1 and 2 is obtained by simplification and approximation:
磁发射端口1和端口2的干扰功率谱dB如图5所示，图5a反应磁发射端口1在1kHz～1MHz频率范围内的干扰功率随频率的变化情况；图5b反应磁发射端口2在1kHz～1MHz频率范围内的干扰功率随频率的变化情况。The interference power spectrum dB of magnetic transmission port 1 and port 2 is shown in Figure 5. Figure 5a reflects the variation of interference power of magnetic transmission port 1 with frequency in the frequency range of 1kHz to 1MHz; Figure 5b reflects the variation of interference power of magnetic transmission port 2 with frequency in the frequency range of 1kHz to 1MHz.
1.3构建设备磁耦合关联矩阵，以端口间的耦合度C为元素构建耦合关联矩阵：1.3 Construct the magnetic coupling correlation matrix of the equipment, and construct the coupling correlation matrix with the coupling degree C between ports as the element:
仿真各端口间耦合度，完成关联矩阵元素填充，各端口间耦合度仿真模型和仿真结果如图6和图7所示，。The coupling degree between each port is simulated to complete the filling of the elements of the correlation matrix. The simulation model and simulation results of the coupling degree between each port are shown in Figures 6 and 7.
1.4根据耦合关联矩阵确定磁耦合传递函数1.4 Determine the magnetic coupling transfer function based on the coupling correlation matrix
函数f(Cij)将Cij的值由dB形式转为幅值，确保与相匹配；The function f(C ij ) converts the value of C ij from dB to amplitude, ensuring that Match;
1.5基于设备的设计参数，仿真确定两磁接收端口的敏感度 P1 S(f)和如图8所示，其中图8a表示磁接收端口1在 1kHz～1MHz频率范围内的敏感度；图8b表示磁接收端口2在 1kHz～1MHz频率范围内的敏感度。1.5 Based on the design parameters of the device, the sensitivity of the two magnetic receiving ports P 1 S (f) and As shown in FIG. 8 , FIG. 8 a shows the sensitivity of the magnetic receiving port 1 within the frequency range of 1 kHz to 1 MHz; and FIG. 8 b shows the sensitivity of the magnetic receiving port 2 within the frequency range of 1 kHz to 1 MHz.
1.6利用预测方程评估设备自兼容状况：指定阈值δ＝0dB，确定设备各接收端口接收到的总干扰功率P1 R(f)和分别与P1 S(f)和比较，如图9所示。其中图9a表示磁接收端口1的干扰功率与灵敏度对比，图9b表示磁接收端口2的干扰功率与灵敏度对比。分别求解和转化为dB形式，与δ比较，发现以及可见两接收端口均在10kHz频率附近受干扰。1.6 Use the prediction equation to evaluate the self-compatibility of the device: Specify the threshold δ = 0dB, determine the total interference power P 1 R (f) received by each receiving port of the device and Respectively with P 1 S (f) and The comparison is shown in Figure 9. Figure 9a shows the comparison of interference power and sensitivity of magnetic receiving port 1, and Figure 9b shows the comparison of interference power and sensitivity of magnetic receiving port 2. Solve and Converted to dB and compared with δ, we find as well as It can be seen that both receiving ports are interfered near the 10kHz frequency.
2)根据设备自兼容预测分析方法，对磁晶圆线圈阵列配置的设备逐个进行自兼容预测分析；对于存在潜在干扰的收发对，基于电磁兼容三要素，针对性地采用屏蔽、滤波、接地、隔离等措施进行设计：2) According to the equipment self-compatibility prediction and analysis method, the self-compatibility prediction and analysis of the equipment configured with the magnetic wafer coil array is carried out one by one; for the transceiver pairs with potential interference, based on the three elements of electromagnetic compatibility, targeted shielding, filtering, grounding, isolation and other measures are adopted for design:
本实施例中，根据设备自兼容预测分析结果，在磁发射端口1前加装滤波器，滤波器在10kHz附近干扰抑制能力不小于10dB，在磁发射端口2前加装滤波器，在10kHz附近干扰抑制能力不小于13dB。In this embodiment, according to the results of the equipment self-compatibility prediction analysis, a filter is installed in front of the magnetic transmission port 1, and the interference suppression capability of the filter near 10kHz is not less than 10dB. A filter is installed in front of the magnetic transmission port 2, and the interference suppression capability near 10kHz is not less than 13dB.
实施例2Example 2
一种高密度磁晶圆线圈阵列电磁兼容性分析设计方法，本方法中定义单磁晶圆线圈为磁端口，具体包括磁发射端口和磁接收端口，所述设备包括多台时，定义壳体为电端口，具体包括电发射端口和电接收端口，仿真各设备壳体—壳体耦合，建立设备间的电耦合关联矩阵。A method for electromagnetic compatibility analysis and design of a high-density magnetic wafer coil array. In the method, a single magnetic wafer coil is defined as a magnetic port, specifically including a magnetic transmitting port and a magnetic receiving port. When the device includes multiple devices, the shell is defined as an electrical port, specifically including an electrical transmitting port and an electrical receiving port. The shell-shell coupling of each device is simulated to establish an electrical coupling association matrix between the devices.
本实施例中包括两台设备，共包含4个磁发射端口，2个磁接收端口，包含1个壳体电发射端口和1个壳体电接收端口，如图10所示。两台设备自兼容分析方法与实施例1相同，本实施例不再赘述，仅就设备间电磁兼容性分析进行说明。This embodiment includes two devices, including 4 magnetic transmitting ports, 2 magnetic receiving ports, including 1 shell electrical transmitting port and 1 shell electrical receiving port, as shown in Figure 10. The self-compatibility analysis method of the two devices is the same as that of Example 1, and this embodiment will not be repeated, and only the electromagnetic compatibility analysis between the devices will be described.
1)对设备间电磁兼容状况进行预测分析与评估1) Predictive analysis and evaluation of electromagnetic compatibility between devices
1.1建立设备间电磁兼容性预测方程。设备组合的1个电接收端口接收到的总干扰功率为1.1 Establish the electromagnetic compatibility prediction equation between devices. The total interference power received by one electrical receiving port of the device combination is
其中为电发射设备从壳体端口发射的干扰功率函数；为从电发射设备的壳体端口耦合到电接收设备壳体端口的耦合传递函数。in is a function of the interference power emitted by the electric transmitting device from the housing port; It is the coupling transfer function from the housing port of the electric transmitting device to the housing port of the electric receiving device.
设备组合的第1和第2个磁接收端口接收到的总干扰功率分别为The total interference power received by the first and second magnetic receiving ports of the device combination is
其中为设备组合第j个磁发射端口的干扰功率函数；和分别为从第j个磁发射端口耦合到第1个和第2个磁接收端口的耦合传递函数。in is the interference power function of the jth magnetic transmission port of the device combination; and are the coupling transfer functions from the jth magnetic transmitting port to the 1st and 2nd magnetic receiving ports, respectively.
通过这两个预测方程，分别得到电和磁接收端口处的总干扰功率，与敏感度门限相比较确定是否存在潜在的电磁干扰问题。Through these two prediction equations, the total interference power at the electric and magnetic receiving ports is obtained respectively, and compared with the sensitivity threshold to determine whether there is a potential electromagnetic interference problem.
1.2基于测试数据确定设备组合所有磁发射端口的干扰功率函数如图11所示，其中图11a、图11b、图11c、图11d 分别为磁发射端口1、2、3、4的干扰功率谱；确定电发射设备壳体发射端口的干扰功率函数如图12所示。1.2 Determine the interference power function of all magnetic transmission ports of the device combination based on test data As shown in FIG11 , FIG11a , FIG11b , FIG11c , and FIG11d are interference power spectra of magnetic transmitting ports 1, 2, 3, and 4, respectively; the interference power function of the transmitting port of the housing of the electric transmitting device is determined As shown in Figure 12.
1.3以各端口间的耦合度C为元素构建设备组合的磁耦合关联矩阵：1.3 The magnetic coupling correlation matrix of the device combination is constructed with the coupling degree C between each port as the element:
仿真关联矩阵中各磁端口间耦合度，完成关联矩阵元素填充，如图13所示，图13a～图13h分别为发射端口—接收端口对1-1、2-1、 3-1、4-1、1-2、2-2、3-2、4-2间的耦合度仿真结果。The coupling degree between the magnetic ports in the simulation association matrix is simulated to complete the filling of the association matrix elements, as shown in FIG13 . FIG13a to FIG13h are respectively the simulation results of the coupling degree between the transmitting port-receiving port pairs 1-1, 2-1, 3-1, 4-1, 1-2, 2-2, 3-2, and 4-2.
1.4根据磁耦合关联矩阵确定磁耦合传递函数1.4 Determine the magnetic coupling transfer function based on the magnetic coupling correlation matrix
函数f(Cij)将Cij的值由dB形式转为幅值，确保与相匹配；The function f(C ij ) converts the value of C ij from dB to amplitude, ensuring that Match;
1.5以端口间耦合度C2为元素构建设备间电耦合关联矩阵：1.5 Using the inter-port coupling degree C2 as an element, construct the electrical coupling correlation matrix between devices:
[C211][C2 11 ]
仿真壳体—壳体耦合，完成电关联矩阵元素填充，壳体—壳体耦合度如图14所示。The shell-shell coupling is simulated and the electrical correlation matrix elements are filled. The shell-shell coupling degree is shown in Figure 14.
1.6根据电耦合关联矩阵确定电耦合传递函数1.6 Determine the electrical coupling transfer function based on the electrical coupling correlation matrix
函数f(C2ij)将C2ij的值由dB形式转为幅值，确保与相匹配；The function f(C2 ij ) converts the value of C2 ij from dB to amplitude, ensuring that it is consistent with Match;
1.7假定磁接收端口的灵敏度为带内工作电平减6dB，仿真设备组合两磁接收端口的敏感度阈值P1 Sm(f)和如图15所示，其中图15a为磁接收端口1的敏感度，图15b为磁接收端口2的敏感度；确定设备组合壳体接收端口的敏感度阈值P1 Se(f)，如图16所示。1.7 Assuming that the sensitivity of the magnetic receiving port is the in-band operating level minus 6dB, the sensitivity thresholds P 1 Sm (f) and As shown in FIG. 15 , FIG. 15a shows the sensitivity of magnetic receiving port 1 , and FIG. 15b shows the sensitivity of magnetic receiving port 2 ; the sensitivity threshold value P 1 Se (f) of the receiving port of the device assembly housing is determined, as shown in FIG. 16 .
1.8利用预测方程评估设备间电磁兼容状况。指定阈值δ＝0dB，确定设备两磁接收端口接收到的总干扰功率P1 Rm(f)和分别与P1 Sm(f)和比较，如图17所示。分别求解和转化为dB形式，与δ比较，发现可见两接收端口均在10kHz频率附近受干扰。确定设备电接收端口的总干扰功率P1 Re(f)，与P1 Se(f)比较，如图18所示。求解转化为dB形式，与δ比较，发现可见两接收端口均在2MHz 频率附近受干扰。1.8 Use the prediction equation to evaluate the electromagnetic compatibility between devices. Specify the threshold δ = 0dB and determine the total interference power P 1 Rm (f) received by the two magnetic receiving ports of the device and Respectively with P 1 Sm (f) and Compare, as shown in Figure 17. Solve and Converted to dB and compared with δ, we find It can be seen that both receiving ports are interfered with at a frequency of around 10kHz. Determine the total interference power P 1 Re (f) at the device's electrical receiving port and compare it with P 1 Se (f), as shown in Figure 18. Solve Converted to dB and compared with δ, we find It can be seen that both receiving ports are interfered near the 2MHz frequency.
2)根据设备间电磁兼容性预测分析方法，对磁晶圆线圈阵列配置的设备组合进行设备间电磁兼容性预测分析；对于存在潜在干扰的收发对，基于电磁兼容三要素，针对性地采用屏蔽、滤波、接地、隔离等措施进行设计：2) According to the electromagnetic compatibility prediction and analysis method between devices, the electromagnetic compatibility prediction and analysis between devices is carried out for the device combination configured with the magnetic wafer coil array; for the transceiver pairs with potential interference, based on the three elements of electromagnetic compatibility, targeted shielding, filtering, grounding, isolation and other measures are used for design:
本实施例中，根据设备间电磁兼容预测分析结果，在磁发射端口 2前加装滤波器，滤波器在10kHz附近干扰抑制能力不小于20dB，在磁发射端口2前加装滤波器，在10kHz附近干扰抑制能力不小于 20dB。另一方面，为抑制设备壳体—壳体的辐射耦合，在不能移动设备进行空间隔离的前提下，需对发射壳体采取屏蔽措施，加装屏蔽外壳，屏蔽效能不低于20dB。In this embodiment, according to the prediction and analysis results of electromagnetic compatibility between devices, a filter is installed in front of the magnetic transmitting port 2, and the interference suppression capability of the filter near 10kHz is not less than 20dB. On the other hand, in order to suppress the radiation coupling between the device shell and the shell, under the premise that the equipment cannot be moved for spatial isolation, shielding measures need to be taken for the transmitting shell, and a shielding shell needs to be installed, and the shielding effectiveness is not less than 20dB.
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