Hi guys,
I have been investigating the characteristics of an DC electrovalve.
I have these data:
Vsupply: 80Vdc
r1: coil resistance (510 Ohms)
r_shunt: (to measure current) (118.1 Ohms)
I apply a step of 80V to the Rshunt+coil and get this graph.
Time constant is about 108ms.
So tau=L/R...
Hi,
I have a client that wants a CCTV recording system with 4CIF resolution for an on board aplication.
I have seen that CIF is thought for digitizing PAL field frames(352 × 288) (1 field giving 288 lines and each horizontal line sampled to 352 pixels)
4CIF (704 × 576) seems that might be...
Hi,
I have a traction application with a VFD-Motor supplier.
It gives me information about response times to change from 100% powering to 100%regenerative braking. (about 4s with jerk limiting 0.8m/s^3)
What it puzzles me is that before passing to braking it waits for 1s dead time without...
Hi,
I have a project in Mexico city, >2000m above sea level, 80% of standard atm pressure.
My pneumatics supplier says that there is no matter for consumption calculation or compressor nominal rate (X normal liters/min) relating the altitude, altought we are really very near the limit. Thay...
Hi, I am reviewing a pneumatic calculation. One step is to calculate how many liters of air (at normal conditions) are needed to fill up some pneumatic springs.
The calculation does the following for getting the volume to add needed (Vn) to get a predefined pressure, (liters at normal...
Hi,
After some months reading about vector control I have been looking for information about how is the real performace of the main variables of the motor (currents, field synchronous speed) when it is commanded torque at zero speed (i.e. as holding brake).
I would like having an insight in...
