Capacitors. So many different types and technologies… but why? What’s unique about them? This blog post attempt to answer those questions about one of the most common capacitor technologies: the aluminum electrolytic capacitor.
The aluminum electrolytic capacitor is a passive component that has traditionally been used for filtering, timing networks, by-pass, coupling and other applications requiring a cost effective, volumetrically efficient and highly reliable component.
An aluminum electrolytic capacitor consists of an anode foil, a cathode foil and separator paper which are wound together and impregnated with an electrolyte. The anode foil has an aluminum oxide layer acting as the dielectric. After the thin aluminum foil (65 to 100 microns) is electrochemically etched to increase the plate’s surface area, the dielectric is produced by anodic oxidation on its surface. The cathode foil, in general, utilizes no oxidation process.
Note that due to the physical design elements and construction, not only does a capacitor have capacitance, but it also has a series resistance and inductance as well as a parallel resistance allowing the flow of current.
The capacitance of aluminum electrolytic capacitors (in microfarads) is expressed by the following equation:
C = 8.855 x 10e-6 x (ES/d)
E = Dielectric constant
S = Surface area of dielectric (cm2)
d = Thickness of the dielectric (cm)
Large capacitance can be obtained when:
- the dielectric constant is high
- the surface area is large
- the dielectric is thin
In aluminum electrolytic capacitors the dielectric constant is only 8 to 10, but the aluminum oxide dielectric layer is extremely thin (about 15 Angstroms per volt). High gain foil produced by the electrochemical etching creates a surface magnification, or gain, as much as 100 times for low voltage foil and 20 to 25 times for high voltage foil. Therefore (and this is a critical benefit of these capacitors):
An aluminum electrolytic capacitor can provide a large capacitance compared to other types of capacitors of the same volume
Nippon Chemi-Con – the parent company of United Chemi-Con – is the world’s largest manufacturer of aluminum electrolytic capacitors. NCC pioneered the development of raw material processing techniques and highly automated production systems. The product improvements of these innovations have dramatically improved circuit design flexibility and led to many new applications for aluminum electrolytic capacitors.
To learn more about aluminum electrolytic capacitors please Contact Cover 2 Sales.
Looking for a DC motor drive? Look no further! ElectroCraft’s DC motor drives are designed for high performance and are ideal when precise speed and position control are required.
ElectroCraft’s Universal Drives utilize state-of-the-art digital-drive technology and an intuitive and highly configurable user interface to take performance, efficiency and flexibility to the next level. These drives are ideal for all DC motor types, including stepper, permanent magnet DC and brushless DC motors, making them perfect for a wide range of industrial, commercial market, and consumer product applications. ElectroCraft offers three standard capacities and customized versions are available.
The PRO Series of programmable drives from ElectroCraft are full programmable motion controllers with unprecedented flexibility in a compact footprint. They are capable of powering permanent magnetic DC, brushless and stepper motors (open and closed loop).
For a further introduction on these motor drives, please watch the following video:
For more information about ElectroCraft motors and motor drives, please contact Cover 2 Sales.
Virtium is a leading innovator in small-form-factor, high-capacity, high-density, high-reliability solid state storage and memory solutions. Their mission is to develop the most reliable storage and memory solutions with the greatest performance, consistency and longest product availability.
Virtium provides industrial-grade solid state storage and memory solutions to meet the requirements of the industrial market. By using high-grade components from industry leading companies, Virtium is able to offer wider temperature range support than many other companies. Solid state solutions are available using MLC, industrial temp MLC and SLC flash devices. And by negotiating strategic supply chain agreements, Virtium is able to support products long after the bleeding edge competitors have moved on to the next big form factor.
Some of Virtium’s unique features include:
- Industrial temperature support (-40ºC to 85ºC)
- ESD, vibration and humidity resistance
- Balanced sequential and random read/write
- 99.9% uptime
- Data protection against unexpected power loss
- Multiple interfaces and form factors
- Low power / long product life
- Legacy support
- ROHS and REACH compliance
Want to know more about Virtium? Please view the following video:
And if you’d like to discuss a specific SSD or memory requirement, please contact Cover 2 Sales.
Whether it’s a military radar system, a terrestrial radio, a satellite communications downlink or high-performance test equipment, customers are routinely faced with the competing demands for higher signal count and smaller product size. SV Microwave’s SMPS multiport edge-launch connectors are the ideal solution for high-frequency, high signal-count, PCB-mount applications where density is of the utmost importance. Operating from DC to 100GHz, the SMPS connector utilizes the same features of the SMP and SMPM connectors, but in a substantially smaller package.
Features of the SMPS Board Mount Connectors Include:
- Performance to 100GHz
- Multiple port counts and detent options available
- Blindmate / push-on design (RFfortless®)
- Customized PCB footprint with design-through-simulation optimization
- Minimal impedance reflections
- High frequency, inside-the-box cable assemblies
- High density multiport connectors and blocks
- Board edge-mount to backplane
- Board-to-board interconnect
In addition to these board mount multiport connectors, SV offers a broad range of coaxial connectors and cable assemblies. Many of them are available (in stock) from our distribution partners.
If you don’t find the configuration you desire, please contact Cover 2 Sales to discuss a solution to meet your needs.
Medical equipment is one of the most rapidly evolving vertical markets in the electronics industry. Equipment is being made smarter, more-capable and smaller. Interestingly, one of the primary complaints with medical equipment is a very low-tech one: Audible noise. Equipment that has to drive a motor, a pump or any mechanical device requires a fair amount of power. And larger power supplies require cooling fans. Fans are the chief culprit of this noise. The market is demanding highly efficient medical power supplies with a smaller form factor, maximum output flexibility and low audible noise.
TDK Lambda has addressed these needs with their new “QM” (Quiet Modular) series of configurable AC/DC power supplies. Utilizing low speed, low audible noise fans, these devices are much quieter than any other solution on the market today.
The QM series of supports up to 18 outputs and total power levels to 1500W, allowing customers to configure exactly the power solution they need. In addition, these supplies come with medical isolation (MoPP) and safety certifications (IEC 60601-1, IEC 60950-1, and IEC 61010-1), making them ideal for medical, test, communications and broadcast equipment. Other features include:
- PMBus™ support
- Global ON/OFF
- Remote ON/OFF
- Remove sense
- -20C to +70C operating temperature
- Seven (7) year warranty
If you’d like more information on the QM series – or if you have a power supply requirement you’d like to discuss, please contact Cover 2 Sales