No. If you had information to convey, why try to leave the listener confused about what your are trying to say?
EE,
You're smarter than that, you're concerned you won't be able to get oven bulbs? Give me something to work with here.
Rob
No. If you had information to convey, why try to leave the listener confused about what your are trying to say?
Yes and no, some of the old lathes used those but it depends on the lateral and axial stresses, the main problem is pistons going up and down in cast iron blocks, gears grinding along, rubber seals, etc.
Once again, a mechanical device will never out do and electronic one for simplicity and low maintenance.
Rob
That's why all the 7M Fanuc controls are gone from work, they(controls) were too expensive to repair compared to the productivity of the machine.
Really, what parts failed?That was more of about obsolete parts, and obsolete parts are expensive. Today those circuits could be redesigned for a fraction of the cost. Now the MBTF on stuff is ridiculously long. I can design circuits that will outlast all of us, and I have already.
Rob
Absolutely, but you will never see everyone generating their own power so AC is here to stay. Step up/ step down is too efficient for DC to compete for transmission. Distance losses will always be a killer with DC.At the turn of the last century there was a big battle going on with Tom Edison and George Westinghouse. Nikola Tesla came along and invented the AC motor and with AC being inducible Edison took a nose dive. That's why we have AC in our homes now and not DC. Today, if I had my way all my appliances would be 48 volt DC because of MOSFET's, IGBT's, etc. we don't need the induced current systems we used to have and we can save a bundle on power transformers with all that copper. There will be a time in the future when everyone will generate their own power, no more power line losses and a bullet proof grid.
Technology used right is better for all of us and the planet.
Rob
Absolutely, but you will never see everyone generating their own power so AC is here to stay. Step up/ step down is too efficient for DC to compete for transmission. Distance losses will always be a killer with DC.
larry
HVDC (high Voltage DC) long distance transmissions are significantly more efficient and even cheaper than long distance AC transmission. AC long distance lines suffer skin effect when the current is located on the surface of the conductor, they require three conductors. They have inductive and capacitive leakage against adjacent conductors and ground.
DC transmission lines have only two conductors, the current flows trough the whole cross section of the conductor, they don't have capacitive and inductive leakage etc. The biggest problem is changing the voltage. There are several such lines in operation for more that 50 years. The early version had rotational transformers consisting from motor and generator on each end. New installation might have solid state equipment. DC lines could transfer power across the US taking advantage of the fact that in example sun shines in the East four hours earlier than in the west. In other words it would be much easier to share generating capacity across the whole country or continent. DC lines are economically very effective for long distance due to high cost of the equipment used for voltage changing. There are several HVDC project in study or planning state in the USA. Since the DC can transfer power using lower voltage they are often used for undersea transmission lines.
I thought that Tesla and Edison resolved the issue over high voltage AC vs DC over 100 years ago. I know that new technologies and conductors could change the equation, I just haven't read anything about it lately. I could see where DC would have some advantages and technologically, changing the voltage shouldn't be insurmountable using inverters and transformers. However, It would be impractical to convert all household appliances and industrial applications to DC.
Jim
DC has several disadvantages making it impractical for short distances.
1.) the cost of the equipment "transforming" the voltage (inverters) is expensive relative to energy saving.
2.) It is unidirectional. It can be made bidirectional but it would become even more to expense.
For long distances like for across the country where lower losses are worth the expense DC is hard to beat. In fact that is only system (beside some exotic) making cross country possible and practical.