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保护可编程直流电源: 防止电感、电容和振荡负载的不利影响 Tuesday, October 28, 2025
连接直流电源与负载看似简单,但在某些复杂场景下可能充满挑战。尽管电源制造商设计产品时已确保其在多种负载下的稳定性,但某些负载特性仍可能带来风险,甚至损坏电源的输出级。感性负载、容性负载以及负载电流快速变化的负载可能引发振荡,危及电源和负载设备。此外,感性和容性负载会向电源反馈能量。本文将探讨直流电源可能面临的各类危险负载类型,并提供解决方案,以确保电源可靠运行并保护负载安全。 感性负载: 感性负载(如电机、螺线管和机电继电器)可能成为能量源,向电源反馈能量并造成损坏。当电压和电流施加到感性负载时,会建立磁场并储存势能。在电源断开时,磁场崩溃,产生反向极性的电压尖峰。这种反向电动势可能损坏电源的输出级。 为保护电源,可在电源输出端并联一个反向偏置二极管,称为续流二极管或飞轮二极管。当电源关闭时,该二极管为感性负载产生的电流提供通路,从而保护电源免受反向电动势冲击 …
Battery Emulation Testing for Repeatable and Efficient Results Wednesday, April 24, 2024
How can we test battery-powered electronics? If we test with a battery or a battery pack, we are working with a voltage source that does not have a constant output. The battery output is not repeatable and must be disposed of if it is a primary battery or re-charged if it is a secondary battery. We could use a conventional power supply, but we cannot ensure that the electronics perform correctly …
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Unleashing Power and Efficiency: The EA 10000 Industrial Series Revolutionizes High-Power Testing Thursday, December 7, 2023
In the realm of high-power systems, where innovation drives progress, transitioning from design to manufacturing is a critical challenge for test engineers. The complexity of applications, such as renewable energy systems, electric vehicles, battery storage, and advanced avionics, demands a careful balance in achieving flexibility, safety, cost-effectiveness, space efficiency, and energy …
The Benefits of Autoranging vs Conventional DC Power Supplies Monday, May 1, 2023
How Autoranging Saves Capital Costs and Rack Space (and How True Autoranging Saves Even More!) You need a high-capacity power supply. Should it be a conventional power supply with a rectangular output characteristic or a power supply with an autoranging, constant power output characteristic? That depends on the load the power supply must support. If the load is a constant power output device such …
Solutions to the Challenges of High Power ATE System Design Tuesday, March 7, 2023
So, your assignment is to design a new high-power automated test equipment (ATE) system for a new product. Your challenge is to design a test system with maximum test performance to fully test the product within a pre-defined budget. Oh yes, the system must be reliable to avoid lost production time. The system must be online at all times except for maintenance shutdowns. Also, both the capital and …
Repurposing and Recycling EV Batteries Tuesday, July 6, 2021
It’s no secret that there are more electric vehicles (EVs) on the road today than ever. Since 2015, the number of electric vehicles worldwide has grown from 1.4 million to more than 8 million today. Because EVs emit far fewer hydrocarbons than vehicles powered by internal combustion engines, they are an important part of the plan to combat climate change. EVs do, however, present other challenges …
What Power Supply Trends Exist in the Semiconductor Market? Wednesday, April 14, 2021
As the semiconductor industry begins to heat up in 2021, at least according to Semiconductor Industry Association’s optimistic forecasts device demand, test engineers are going to need to find new ways to cool down their power supplies. While in the past water-cooled power supplies were only available as part of a custom-designed solution, now companies are offering advanced water-cooled power …