Новини світу мікро- та наноелектроніки

Simulating an Op-Amp’s Offset Voltage Variation

AAC - 4 hours 51 min ago
In this article, we’ll create an LTspice circuit for analyzing the effect of unpredictable offset voltage on the performance of a precision current-source circuit.

AMD to Purchase Xilinx for $35 Billion in Stock Deal

AAC - Tue, 10/27/2020 - 21:10
Advanced Micro Devices has agreed to buy rival Californian chipmaker Xilinx in a $35 billion all-stock deal, the latest in a wave of high-profile mergers and acquisitions currently sweeping the semiconductor industry.

Understanding Terminal Blocks for Safe Connections

AAC - Tue, 10/27/2020 - 19:00
Learn about the key electrical and mechanical considerations, safety ratings, and more in greater detail to aid in the terminal block selection process.

UK’s CSA Catapult and Taiwan’s ITRI sign MoU

Semiconductor today - Tue, 10/27/2020 - 18:39
During a virtual visit to Taiwan on 21-22 October to further develop the UK-Taiwan trade relationship, the UK Minister for Trade Policy Greg Hands launched the UK-Taiwan International Showcase for Compound Semiconductor Technology, featuring nine UK businesses pitching to a virtual audience of 200 potential collaborators and investors...

II-VI wins Supplier Award for Optical Modules from Fujitsu

Semiconductor today - Tue, 10/27/2020 - 17:30
Engineered materials and optoelectronic component maker II-VI Inc of Saxonburg, PA, USA (which supplies optical transceivers) has received the 2019 Supplier Award for Optical Modules from information technology equipment & services company Fujitsu Ltd of Tokyo, Japan...

How a spare can of electrons a.k.a. portable charger for EVs looks like

EDN Network - Tue, 10/27/2020 - 16:26

One of the issues that proponents of electric vehicles (EVs) worry about—whether actual or potential purchasers—is the possibility of running low and then out of sufficient battery charge. That is equivalent of running out of gas with an internal combustion engine (ICE)-based vehicle, or both gas and electrons for a hybrid electric vehicle (HEV).

There is no comparably convenient solution to the “out of fuel” problem for EVs, at least not until recently. What’s missing, in colloquial terms, is the equivalent portable “can of electrons.” Given the concerns and realities of low EV-battery reserve energy while on the road, I was intrigued when I saw this partial-recharge system from SparkCharge.

SparkCharge has developed a portable unit which is built up of battery modules using the common 18650-format cylindrical lithium-ion (Li-ion) cells—the same cells used in the Tesla Model S and Model X. The battery modules can be stacked physically and electrically to increase energy-storage capacity, and are connected to a single charger module (Figure 1). The company also claims a refill rate of about a mile per minute.

Figure 1 The SparkCharge system uses a set of stackable modules for the energy-storage batteries as well as for their charger. Source: SparkCharge

Portable EV charger

The charger module supports a maximum continuous 40-A output at 500 V. The DC fast charging complies with the CHAdeMO standard while the Combined Charging Standard (CCS) compatibility is planned for a later stage. The key specifications are:

  • 20 kW DC charger (9 kg) with CHAdeMO or CCS combo plug is coming
  • Single module (22 kg): 3.5 kWh (3.2 kWh usable) and 159 Wh/kg (145 Wh/kg usable)
  • Battery modules can be recharged using traditional 110 V or 220 V household outlets
  • Up to five modules:
    • One module (22 kg): 3.5 kWh (3.2 kWh usable) for 14-15 miles of range
    • Two modules (44 kg): 7 kWh (6.4 kWh usable) for 28-30 miles of range
    • Three modules (66 kg): 10.5 kWh (9.6 kWh usable) for 42-45 miles of range
    • Four modules (88 kg): 14 kWh (12.8 kWh usable) for 56-60 miles of range
    • Five modules (110 kg): 17.5 kWh (16 kWh usable) for 70-75 miles of range

Figure 2 By allowing uses to set the modularity, the SparkCharge unit can fit the available space in roadside-service vehicles, which also must carry lots of other spares and tools. Source: SparkCharge

The product is designed to be carried by a standard roadside-service truck to the stuck EV, the one that also carries gas cans, battery booster, and tire changing gear. The company is partnering with local roadside operations, including the well-known AAA network in some localities.

SparkCharge is not the only innovator to realize that there’s a need for charging of EVs away from formal charging stations. FreeWire Technologies has unveiled the Mobi EV Charger, a Level 2 AC and DC fast-charging station on wheels to be used in place of conventional charging stations in contrast to fixed-in-place roadside emergencies (Figure 3).

Figure 3 The Mobi EV Charger targets on-site portability rather than roadside support. Source: FreeWire Technologies

Likewise, Lightning eMotors, formerly Lightning Systems, has a mobile charging system mounted in a towed trailer or self-contained van, targeting large commercial trucks and buses (Figure 4). All three of these systems are battery-powered; they do not use gasoline-powered or similar generators internally. Of course, they do need to be recharged somewhere and somehow when not in use.

Figure 4 The mobile charging system is designed to fit into a van or be towed on a trailer behind a small truck. Source: Lightning eMotors

Design issues and tradeoffs

I won’t offer an opinion about SparkCharge’s business model or their financial prospects, as there are plenty of pundits and analysts out there who will do that. What I’d like to know more about, however, are the electrical and mechanical design issues and tradeoffs they faced. Unfortunately, the available collateral on that is non-existent. I do like the aspect of having the power modules themselves snap together for fairly simple boost in total battery capacity and energy storage.

It allows the unit to be tailored to the available space in the service vehicle and also decouples recharging the battery units from the travel unit; it is somewhat analogous to families of power tools with their interchangeable rechargeable battery packs. I do wonder how the gradations in the number of battery modules and thus stored energy in use affect components such as connectors as well as different thresholds of regulatory approvals.

What’s your view on the technical challenges facing this approach to bringing “electrons in a can” to a stranded EV? What would you like to see as a solution? What changes would you make or features would you add or eliminate, if you could? Your comments and feedback on these issues are welcome.

Bill Schweber is an EE who has written three textbooks, hundreds of technical articles, opinion columns, and product features.

Related articles:

googletag.cmd.push(function() { googletag.display('div-gpt-ad-native'); });

The post How a spare can of electrons a.k.a. portable charger for EVs looks like appeared first on EDN.

Xilinx Brings FPGA DNA to a Custom Hybrid System-on-Chip for 5G Radio Units

AAC - Tue, 10/27/2020 - 15:00
Xilinx solutions are surfacing for each new wave in the 5G rollout. Appearing in 2021, the new RFSoC DFE is forecasted to break all existing benchmarks.

The surface temperature of metal film resistors can't be read by an infrared thermometer

Reddit:Electronics - Tue, 10/27/2020 - 11:58

I found this out the hard way while testing the temperature of some resistors I had wired up to my bench power supply. As it turns out, the surface of these resistors be read by an infrared thermometer!

submitted by /u/Kahenraz
[link] [comments]

Smoke Level Detector with Alarm

Open Electronics - Tue, 10/27/2020 - 10:24

The level of Smoke in our Surrounding because of combustion. So, We can sense the amount of smoke and generate an alert signal. To achieve this we will use an Arduino board with gas sensor breakout board and buzzer. More info

The post Smoke Level Detector with Alarm appeared first on Open Electronics. The author is Carlo Palumbo

Nexperia Creates a New FET Category: the Application-Specific FET (ASFET)

AAC - Tue, 10/27/2020 - 03:00
FETs and MOSFETs don't always cut it for dynamic applications. Nexperia says it has created a new flavor of FETs designed to rise to the challenge.

IMI Stakeholder Forum 2020 - 10 November 2020, Online

EC:RIC: - Tue, 10/27/2020 - 02:00
[Source: Research & Innovation] The IMI Stakeholder Forum 2020 will take place online on Tuesday 10 November. The theme this year is 'Broader horizons: growing Europe’s health partnership'. IMI launched its last calls for IMI2 this year, and the Stakeholder Forum will allow to take stock of what was achieved, and the many lessons learned around what has worked well. IMI will also explore what can be improved upon, and look forward to a new adventure being proposed under Horizon Europe. The event will feature leaders in both policy making and science and technology expertise. It will focus on paediatric cancers to demonstrate how a new partnership would bring new stakeholders together, synergise with the Cancer Mission and be more inclusive in the co-creation of ideas for the programme. IMI will also want to listen to stakeholders to help develop the new partnership, avoid pitfalls and build together a world leading collaboration. Registration is free but obligatory. The deadline for registration is 8 November 2020.


Subscribe to Кафедра Електронної Інженерії aggregator - Новини світу мікро- та наноелектроніки