Recent content by paulie walnut

Well the motor will have a disc rotating on a shaft so the load will be almost insignificant I think. I have the spec's of the motor so I had hoped to be able to "work backwards" using this info and calculate the power usage.

Hi there! I'm working on a project that involves the operation of a variable speed drive controlling a motor. I'm wondering if it is possible to calculate the power usage of the motor if the rpm of the motor is known. I'm not very knowledgeable when it comes to matters electrical but I...

I want to know how one might calculate the cross correlation of two signals by hand. I know that there are a myriad of software applications that will do this for me but I want to understand how it is done by hand. I'm using the expression: ccxy[k] = ∑ x[n]. y[n+k] I'm just not too sure what the...

Thanks a million grzz!

Ok good stuff. I know that the slope is equal to B. Is R0 then equal to the intercept?

Ok I think I'm getting there. So Ro is resistance at an arbitrary temperature eg. room temperature? So what is the first R?

Hi grzz, how can I take the ln of both sides if B is unknown?

I'm using Visual Basic to graph data from a NTC thermistor and temperature sensor (via a DAC card). I want to calculate the thermistor coefficients R0 and B according to the equation (R0 should have subscript 0): R = R0.e^B/T...

An input of 2.δ(t) is applied to a system and produces the response y(t)=6.e^-2t - 4.e^-3t Find an expression for the systems frequency response. The method used would be great too. I know there's some Fourier transforms involved.