Hi, I am carrying out some switching measurements on a one-phase transformer and it would be very important that I could set the same residual flux before each measurement.
For instance, could I use DC-source so that through the winding flows DC-current that would set residual flux to some...
Hi, I am carrying out some switching measurements on a one-phase transformer and it would be very important that I could set the same residual flux before each measurement.
For instance, could I use DC-source so that through the winding flows DC-current that would set residual flux to some...
Im using chopper with 50Hz frequency. But my DC-motor has time constant L/R=1ms and thats much smaller then 20ms (chopper period). Because of that, armature motor current isnt constant, and with every "chopp" armature current falls to zero and goes up again (exponential-like)... and so...
i need axis (i hope thats the name...my english isnt very flexible ; ) for a DC motor. on this axis will be human organ and this organ will be "scaned" with ultrasound. so i need material for axis that will be unvisible on ultrasound pictures. this organ and whole imaging is happening...
i need axis (i hope thats the name...my english isnt very flexible ; ) for a DC motor. on this axis will be human organ and this organ will be "scaned" with ultrasound. so i need material for axis that will be unvisible on ultrasound pictures. this organ and whole imaging is happening...
i use chopper to control speed of DC motor. i assume: with chopper i decrease armature current (its constant), but armature voltage is "jumping and falling". Well, torque is proportional to armature current and speed is proportional to armature current. It isnt clear to me: difference...
