Hitachi is a highly diversified company with products and solutions in High Functional Materials & Components, Power Systems, Electronic Systems & Equipment, Automotive Systems, Digital Media…
Hitachi – Engineering and Technologies
Hitachi was founded in 1910 by electrical engineer Namihei Odaira. The company’s first product was Japan’s first 5-horsepower electric induction motor, initially developed for use in copper mining. Odaira’s company soon became the domestic leader in electric motors and electric power industry infrastructure
Hitachi J100 adjustable and Variable frequency drive. Photographed by C J Cowie
Hitachi at Wikipedia
Hitachi has contributed immensely to semiconductor and electronic manufacturing technologies.
- 1958 Completed six-transistor miniature portable radio
- 1959 Completed electronic computers based on transistors
- 1966 Developed LTP processing technique for silicon transistors
- 1978 Experimental color camera with solid-state miniature image device developed
1976 Hitachi portable VTR, for Sony 1″ type C; the source and take-up reels are stacked for compactness.
HITACHI 1 Zoll-C-Maschine – Video tape recorder
In 1876, Thomas Alva Edison opened a new laboratory in Menlo Park, New Jersey. Out of the laboratory came arguably the most famous invention of all-a practical incandescent electric lamp. By 1890, Edison had organized his various businesses into the “Edison General Electric Company.”
General Electric Company – GE
General Electric 40W light bulb.
“Charles Proteus Steinmetz, already a distinguished industrial scientist, was hard at work as GE’s chief consulting engineer. After years of persuasion, Steinmetz convinced the GE leadership that the company would need a research laboratory to maintain its edge in lighting and electricity and also finding new areas to grow.” – Heritage of Research
Charles Proteus Steinmetz He made ground-breaking discoveries in the understanding of hysteresis that enabled engineers to better design electric motors for use in industry.
Siemens is one of the world’s largest technology companies. Siemens has six major business divisions: Communication and Information, Automation and Control, Power Generation, Transmission and Distribution, Transportation and Automotive, Medical, and Lighting.
Siemens – Industrial Technology
Siemens & Halske was founded by Werner von Siemens and Johann Georg Halske on 12 October 1847. Based on the telegraph, his invention used a needle to point to the sequence of letters, instead of using Morse code. The company, then called Telegraphen-Bauanstalt von Siemens & Halske, opened its first workshop on October 12. – Wikipedia – Siemens
Analog Integrated Circuits 1976 – Siemens
In 1999, Siemens’ semiconductor operations were spun off into a new company called Infineon Technologies.
In 1881, a Siemens AC Alternator driven by a watermill was used to power the world’s first electric street lighting in the town of Godalming, United Kingdom.
Siemens Console 1988
Siemens Industry Automation and Drives
Complete and integrated line of products, systems and solutions for production and process automation. Customized automation solutions based on Totally Integrated Automation (TIA) and Totally Integrated Power (TIP).
Electromagnetic interference (or EMI, also called radio-frequency interference or RFI when in radio frequency) is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.
Electromagnetic interference Wiki
Vertical polarized VHF- UHF biconical antenna
170 – 1100 MHz with omni directional H-plane pattern
Who would know better about Radio Frequency Interference and ElectroMagnetic Interference more than the Hams or Amateur Radio Community.
If they have to communicate effectively using limited resources, they have to deal with EMI/RFI effectively, While they build their equipment or combat Noise from other Machines and Installations nearby.
This problem needs more practical involvement and experimentation to learn, compared to learning something like Digital Electronics.
Equipment and Electricals like SMPS, AC/DC Drives, Motors, Solenoids and CFL Lamps are to be built/reinforced for low EMI/RFI emission/radiation.
Sensitive Medical Equipment like ECG or even a Aircraft can be seriously affected by Noise.
Radio Frequency Interference (RFI)