Jordan Yates

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What Are DC Link Supporting Filters?

Posted by Jordan Yates on Sep 27, 2023 8:15:00 AM

In power electronics, the DC link refers to the section that connects the input and output sides of the power conversion system (Figure 1). The primary function of the DC link is to store energy during the times when the input power is higher than the output power and release energy when the output power demand exceeds the input power. The DC link should include a capacitor that servers as a supporting filter to act as a buffer, minimize voltage ripples, and smooth and stabilize the power flow between various components such as rectifiers, inverters, and other converters in the power system.

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Topics: Capacitor

Understanding the Crucial Role of Snubber Capacitors in Power Electronics

Posted by Jordan Yates on Sep 20, 2023 8:28:00 AM

Large voltage spikes are common in power circuits, particularly during switching—a core action for device functionality. As a result, voltage suppression is a fundamental system requirement to protect circuits.

Enter: snubber capacitors

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Topics: Capacitor

What are Bootstrap Capacitors?

Posted by Jordan Yates on Sep 13, 2023 10:13:14 AM

Power electronics play a critical role in converting and managing electrical energy efficiently. As electric vehicles (EVs), renewable energy systems, and consumer electronics quickly become more powerful, the demand for high-voltage power electronics is quickly increasing. This means the importance of components like bootstrap capacitors has grown significantly.

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Topics: Capacitor

What Are Decoupling Capacitors?

Posted by Jordan Yates on Aug 23, 2023 8:30:00 AM

As you likely know, capacitors are used in electronic circuits to provide local energy storage and stabilize power supply voltage. Decoupling capacitors are a specific type of capacitor used to isolate or decouple two circuits. In other words, these capacitors decouple AC signals from DC signals or vice versa. Decoupling capacitors act as a buffer, supplying clean and stable power to components, which minimizes the risks of malfunctions, noise coupling, or signal integrity issues.

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Topics: Capacitor

The Evolution of Electric Vehicle Battery Management Systems: From Passive to Active Cell Balancing

Posted by Jordan Yates on Aug 16, 2023 8:30:00 AM

As electric vehicle (EV) manufacturers work to make batteries more affordable and easier to produce in mass quantities, we’re seeing changes in battery chemistry. For example, the industry is shifting from traditional lithium ion batteries with cobalt to lithium iron phosphate (LFP) batteries. Rare-earth metals like cobalt are in short supply, and materials like LFP are a more plentiful, sustainable, and efficient alternative.

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Topics: Electric Vehicles

What Are EMI Filters?

Posted by Jordan Yates on Aug 2, 2023 8:30:00 AM

To understand what an electromagnetic interference (EMI) filter is, and what it does, we need to first know what EMI is and why it needs to be filtered. EMI refers to undesirable electromagnetic emissions or disturbances generated either by electronic devices or natural sources in the environment that can interfere with the proper functioning of other nearby devices or systems. EMI noise can propagate through power supply lines and radiate into the environment, potentially causing disruptions or malfunctions in other electronic systems. For many devices, this could cause big issues, which is why many government organizations have developed regulatory standards for electromagnetic compatibility (EMC), or when two pieces of electronic equipment can function in the same environment without adversely impacting one another. 

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Topics: Filtering

Understanding the Role of Ceramic Capacitors in Implantable Deep Brain Stimulators

Posted by Jordan Yates on Jul 19, 2023 8:30:00 AM

A deep brain stimulator (DBS), also known as a neuro-stimulator, is a medical device that uses electrical stimulation to treat neurological disorders such as Parkinson's disease, essential tremor, dystonia, and obsessive-compulsive disorder (OCD). The DBS is typically implanted under the skin near the collarbone or in the abdomen, and connected to a thin wire, or lead, that runs under the skin to the targeted area of the brain as shown in Figure 1. 

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Topics: Capacitor, Medical

What Are DC-Blocking Capacitors, and Why Are They Important?

Posted by Jordan Yates on Jun 21, 2023 1:48:35 PM

Electronic devices power our world and allow us to communicate. In all applications requiring signal integrity and accurate power amplification, blocking capacitors are used to provide clean waveforms and correctly amplified voltages.

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Topics: Capacitor

The Important Role of a Bypass Capacitor

Posted by Jordan Yates on Jun 14, 2023 8:30:00 AM

Electronic devices provide the tools we need to power the world. From cell phones to modern vehicles to scientific equipment to the appliances in our homes, we rely on electronics to improve and even lengthen our lives. All electronics depend on clean power, and the bypass capacitor is crucial in ensuring devices safely meet their power specifications.

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Topics: Capacitor

How The Shift to SiC-Based Semiconductors in Military Power Supplies Affects Capacitor Selection

Posted by Jordan Yates on May 31, 2023 8:45:00 AM

To protect people and critical equipment, military-grade electronic devices must be designed to function reliably while operating in incredibly harsh environments. Therefore, instead of continuing to use traditional silicon semiconductors, in recent years, electronic device designers have started to use wide band-gap (WBG) materials such as silicon carbide (SiC) to develop the semiconductors required for military device power supplies. In general, WBG materials can operate at much higher voltages, have better thermal characteristics, and can perform switching at much higher frequencies. Therefore, SiC-based semiconductors provide superior performance compared to silicon, including higher power efficiency, higher switching frequency, and higher temperature resistance as shown in Figure 1.

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Topics: Capacitor, Military and Aerospace, High Reliability

Insights Into Precision Passive Devices

Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, Resonators, non-magnetic components and advanced dielectric materials. An umbrella for the brands of Compex, DLI, Johanson MFG, Novacap, Syfer and Voltronics, Knowles Precision Devices serves a variety of markets including military, aerospace/avionics, medical equipment, implantable devices, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, automotive, telecoms and data networks.

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