Do electric power steering units use inverters? I’ve seen some commercial vehicle ePS unit’s talking about integrated inverters, but I was assuming ePS units operate a DCDC motor, so is there ever a need to convert to AC? I assume if it’s operating at a different voltage there may need a...
Hello, hoping to be pointed towards anything on the topic of power transmission selection based on current levels. I’m familiar with changing wire gauge size based on higher current, but at what point do different power transmission methods start to make commercial sense? For example when do bus...
is there a simple equation to use to find the average bearing stress in a slot in a plate due to a bolt loading?
I've seen the equation STRESS=F/A and for small holes A=dt (where d=bolt diameter and t=thickness of the plate) but how do you apply this stress equation to a bolt acting on a slot...
I see a flood of AC/DC converters out there but is there an off the shelf product that does a straight AC to DC conversion at the same voltage (over an AC input range between 0-120V). So I can plug this converter into a wall outlet at 120V AC and then plug something else into this converter...
I'm having trouble finding an applicable equation to use...
Let's say I have a simple circuit with a voltage source and a resistor. I know the initial voltage of the battery and the resistance of the resistor, I want to know the current (or voltage) with respect to time.
what equation will...
is there a simple inexpensive electronic device that I can buy and put in series with an wall outlet that can produce a voltage from 0-120V by turning a dial or something simple. I'm thinking something simple like a dimmer switch, but I know those only vary voltage over a small range. Thanks for...
How could I calculate the minimum voltage required to light up a simple 60W tungsten incandescent light bulb, assuming that I have a wire and a variable voltage source?
I could set up an experiment and connect the bulb to the voltage source and slowly crank up the voltage from zero until I see...
I'm am trying to understand electronics by playing around with them, and I want to know the very simplest way of creating any periodically time varying current (AC)from a DC power source. I don't care about the shape or amplitude of the AC currnet as long as it has a periodic frequency...
Ive...
Im pretty ignorant of EE...
But if I have just a simple antenna thats recieving radio waves what do I have to do with the the antenna to measure a current through it that's induced solely from the radio waves. For example complete a circuit with a resistance, ground it, etc??? Thanks and I'll...
We have a flange with 3/8" bolt holes made of 304 stainless, inside this vessel hot gas is cycling through at 900F and 50psia. Gas flow will be pulsating and not continuous use. Is there any real worry if we use grade 8 c.steel bolts? The thermal expansion difference between dissimilar metals...
We have a project that we're goint to have to weld a tee joint for two plates of stainless steel. One piece is 5/8" thick and the one the tees up to it is 3/8" thick. Is there any guidence out there for the design dimensions for the slot? Im not having any luck on google.
TEMA gives a 'G' factor in calculating tube sheets (See TEMA RCB-7.132) which is the the gasket side 'ID'. well, our tube sheet is very skinny and very long, if I use G to be my shorter distance the required thickness is very thin, if I use G to be my longer distance than it is very thick. Which...
Hypothetically if we have a condenser that has 100% saturated steam in the tubes with an inlet condition of 14.7psia and 250F and an outlet condition of 200F, in which the temperature drop is a result of only cold air on the outside of the tubes.
Once the steam is cooled down to 212F it will...
We are having trouble drilling in 11GA 304 stainless steel.
We drill lots of closely packed holes 3/8" od. No matter how we fixture and clamp the sheet to the table the sheet is still warping and creating a gap between the sheet and the table causing vibration in the sheet while drilling. This...
anyone know a quick equation or rule of thumb to figure out how much heat can be loss through a shell and tube heat exchanger shell side fluid to the atmosphere?
I want to make sure that i am interpretting equations right. The equation for pressure drop across bare tube banks has (pi/po-1) in it for the effects of the change in density. (pi is inlet density, po is outlet density)
Now if pi is greater than po (ie the fluid is being heated) than we have...
