A Custom Approach to Large Capacitor Assembly

Posted by Steve Hopwood on Oct 13, 2021 9:00:00 AM

Achieving high capacitance means going big. But how do you do that while still maximizing board space? At Knowles Precision Devices, we’ve developed a new method for building customizable large capacitor assemblies that capitalize on the vertical space above the circuit board. While stacked capacitor assemblies have been around for many years, these parts do not have very good bump and vibration withstand due to the thin leads used in their construction. These new assemblies from Knowles Precision Devices offer a ruggedized construction capable of withstanding high levels of shock and vibration. This offers a unique combination of capability, durability, high capacitance, and very high voltage in a smaller area, making these capacitors ideal for automotive, military, and aerospace applications.

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Topics: Capacitor, Automotive, Military and Aerospace, High Reliability

Overcoming EMI in Electric Vehicle Applications

Posted by Peter Matthews on May 26, 2021 9:00:00 AM

According to the U.S. Bureau of Transportation Statistics, 2020 was the fifth consecutive year of growth in electric vehicle (EV) sales, and the demand is growing. Based on the first quarter numbers, the Bureau anticipates 2021 sales are on a path to surpass last year’s. 

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Topics: Automotive, Electric Vehicles

Join Us Virtually at The Battery Show Europe 2021

Posted by Dan Gaffney on May 12, 2021 9:00:00 AM

Join Knowles Precision Devices and many members of the advanced battery and EV/HEV community from May 18 – 20 at this year’s virtual edition of The Battery Show Europe. Since this year’s show has been designed to virtually recreate the tradeshow experience from the comfort and safety of your own home or office, we will be exhibiting a variety of our advanced battery technology at virtual booth 8-351.

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Topics: News and Events, Automotive, Electric Vehicles

Looking Closer at Filter Capacitors in Electric Vehicles

Posted by Peter Matthews on Mar 3, 2021 7:00:00 AM

In electric vehicle (EV) applications, filter capacitors are a special type of component commonly used as input and output capacitors. Also known as noise suppression or electromagnetic interference (EMI) filters, these particular capacitors act to remove noise and other unwanted signals on the line. On the high voltage alternating current (AC) side of a system, the capacitors often provide EMI filtering, whereas on the direct current (DC) side of a subsystem, they serve to smooth ripple components of the AC and filter out noise.

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Topics: Capacitor, Automotive, Electric Vehicles

Webinar: Selecting Safe and Reliable Components for High-Voltage EVs

Posted by Steve Hopwood on Jan 21, 2021 9:00:00 AM

With production of high-performance electric vehicles (EVs) such as the Porsche Taycan and several manufacturers slated to release EVs with 800 V battery systems in 2021, using high-voltage battery systems in EVs is no longer just theoretical. Since vehicles operating at higher voltages can address consumer’s main concerns with EVs, this is a welcome advancement, especially as some countries are announcing regulations to eventually allow only EV sales. These changes include accelerating charging time by increasing power and reducing the weight of vehicles which, among other improvements, helps increase driving range and reduce consumer range anxiety.

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Topics: Automotive, Electric Vehicles

Looking Closer at Snubber Capacitors in Electric Vehicles

Posted by Peter Matthews on Nov 24, 2020 10:11:00 AM

In our last article about electric vehicles (EV), we talked about using DC link capacitors as an intermediary buffer in power converters. Today’s topic covers another useful power module component – the snubber capacitor. Snubbers are energy-absorbing circuits used to protect electronics from voltage spikes and transients caused by turning a switch from the On to Off state. Opening a switch intrinsically induces a high voltage across the device, and the snubber provides an alternate flow path for the excess energy to be absorbed by the snubber capacitor and dissipated by a resister or other load.

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Topics: Capacitor, Automotive, Electric Vehicles

Today’s RF Power Applications Require Understanding Equivalent Series Resistance & Q Factor

Posted by Steve Hopwood on Jul 8, 2020 6:00:00 AM

As a fundamental component of circuit design, equivalent series resistance (ESR) is the measurement of all the non-ideal electrical resistances in series with a capacitor. When current flows through a multilayer ceramic capacitor (MLCC) due to application of alternating voltage, heat is generated in the MLCC due to the losses, specifically ESR. As a result, this self-heating can cause various performance and reliability issues in the circuits of today’s more complex and smaller electronic systems.

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Topics: Capacitor, Automotive, Electric Vehicles

Looking Closer at DC Link Capacitors in Electric Vehicles

Posted by Peter Matthews on Jul 1, 2020 8:30:00 AM

DC link capacitors are commonly used in power converters as an intermediary buffer between an input source to an output load that have different instantaneous power, voltages, and frequencies. In electric vehicle (EV) applications, DC link capacitors help offset the effects of inductance in inverters, motor controllers, and battery systems. They also serve as filters that protect EV subsystems from voltage spikes, surges, and electromagnetic interference (EMI).

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Topics: Capacitor, Automotive, Electric Vehicles

Supporting EV Battery Innovation with the Highest Voltage AEC-Q200 MLCCs

Posted by Nan Zhang on Jun 17, 2020 6:00:00 AM

To meet consumer demand for longer driving ranges and faster charging, electric vehicle (EV) manufacturers are redesigning vehicles to move from 400V to 800V battery systems. As a result of using higher operating voltages, EV designers and original equipment manufacturers (OEMs) need components, such as multi-layer ceramic capacitors (MLCCs), that can withstand voltages well beyond those expected under normal operating conditions. For example, a drivetrain running off an 800V battery system may be subjected to a withstand test of up to 4kV DC for 60 seconds, which is a standard safety test in high voltage systems.

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Topics: Capacitor, Automotive, Electric Vehicles

What to Think About When Replacing Film Capacitors with MLCCs

Posted by Steve Hopwood on Apr 29, 2020 2:57:00 PM

CToday, the design and development of many applications, such as power electronics in electric vehicles (EVs), is driven largely by concerns about size and weight. This means the film capacitors traditionally used by electronics engineers aren’t always the best option. Instead, multi-layer ceramic capacitors (MLCCs) are emerging as an excellent alternative to film capacitors. Let’s review some of the considerations to keep in mind when you are deciding if making the switch is the right choice for your application.  

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Topics: Capacitor, Automotive, Electric Vehicles

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.

This Blog will provide insights into:

  • Filters for 5G and mmWave
  • Capacitors for High Voltage
  • Capacitors for High Reliability

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