MVME104 Motorola 能量转换装置  提供卓越的性能和可靠性

摩托罗拉MVME104模块是一个紧凑和坚固的模块，提供卓越的性能和可靠性。它可以承受恶劣的条件，适合在恶劣的工业环境中使用。凭借其坚固的设计和耐用的结构，该模块即使在要求苛刻的应用中也能确保连续运行。

#产品参数

—处理器:摩托罗拉68040

-内存:16MB RAM,4MB Flash

-接口:以太网，SCSI，串口，并口

—工作温度:-40℃~85℃

—电源:5V DC

MVME104作为工作于开关状态的能量转换装置，开关电源的电压、电流变化率很高，产生的干扰强度较大；干扰源主要集中在功率开关期间以及与之相连的散热器和高平变压器，相对于数字电路干扰源的位置较为清楚；开关频率不高（从几十千赫和数兆赫兹），主要的干扰形式是传导干扰和近场干扰;而印刷线路板（PCB）走线通常采用手工布线，具有更大的随意性，这增加了PCB分布参数的提取和近场干扰估计的难度。

EMI测试技术

目前诊断差模共模干扰的三种方法：MVME104射频电流探头、差模抑制网络、噪声分离网络。用射频电流探头是测量差模 共模干扰最简单的方法，但测量结果与标准限值比较要经过较复杂的换算。差模抑制网络结构比较简单，测量结果可直接与标准限值比较，但只能测量共模干扰。噪声分离网络是最理想的方法，但其关键部件变压器的制造要求很高。

目前抑制干扰的几种措施

MVME104形成电磁干扰的三要素是干扰源、传播途径和受扰设备。因而，抑制电磁干扰也应该从这三方面着手。首先应该抑制干扰源，直接消除干扰原因;其次是消除干扰源和受扰设备之间的耦合和辐射，切断电磁干扰的传播途径；第三是提高受扰设备的抗扰能力，减低其对噪声的敏感度。目前抑制干扰的几种措施基本上都是用切断电磁干扰源和受扰设备之间的耦合通道，它们确是行之有效的办法。常用的方法是屏蔽、接地和滤波。

MVME104 Motorola 能量转换装置  提供卓越的性能和可靠性

The MOTOROLA MVME104 module is a compact and rugged module that delivers exceptional performance and reliability. It can withstand harsh conditions and is suitable for use in harsh industrial environments. With its robust design and durable construction, the module ensures continuous operation even in demanding applications.

# Product parameters

- Processor: MOTOROLA 68040

- Memory :16MB RAM,4MB Flash

- Interface: Ethernet, SCSI, serial port, parallel port

- Operating temperature :-40 ° C to 85 ° C

- Power supply :5V DC

MVME104 is an energy conversion device working in the switching state, the switching power supply has a high voltage and current change rate, and the interference intensity is large. The interference source is mainly concentrated during the power switch and the radiator and high level transformer connected with it, and the position of the interference source is more clear than that of the digital circuit; The switching frequency is not high (from tens of KHZ and several megahertz), and the main interference forms are conducted interference and near-field interference; The printed circuit board (PCB) wiring is usually manually routed, which has greater randomness, which increases the difficulty of extracting PCB distribution parameters and estimating near-field interference.

EMI test technology

At present, there are three methods to diagnose differential mode common-mode interference: MVME104 RF current probe, differential mode suppression network and noise separation network. Using RF current probe is the simplest method to measure differential mode common-mode interference, but the measurement results have to go through more complicated conversion compared with the standard limit. The structure of the differential mode suppression network is relatively simple, and the measurement results can be directly compared with the standard limits, but only the common mode interference can be measured. Noise separation network is the best method, but its key component transformer is very demanding.

Several measures to suppress interference at present

The three elements of MVME104 forming electromagnetic interference are the interference source, the propagation path and the disturbed device. Therefore, the suppression of electromagnetic interference should also start from these three aspects. Firstly, the source of interference should be suppressed and the cause of interference should be eliminated directly. The second is to eliminate the coupling and radiation between the interference source and the disturbed equipment, and cut off the transmission path of electromagnetic interference; The third is to improve the immunity of the disturbed equipment and reduce its sensitivity to noise. At present, several measures to suppress interference are basically to cut off the coupling channel between the electromagnetic interference source and the disturbed device, and they are indeed effective methods. The common methods are shielding, grounding and filtering.