3 part 2

the device formed by a P-N junction is called a _

the negative pole of a battery is connected to the n-type material and the positive pole to the p-type. this is called _

if the polarity of the applied voltage were reversed, with the negative pole of a battery being connected to the p-type, the junction potential would be augmented and no current would flow. this is called _

type of rectifiers

types of single phase rectifiers

types of three phase rectifiers

single phase rectifier; electrons flow through the xray tube from the cathod to the anode
when the voltage reverses during the inverse half of the alternating cycle, the rectifier stops current flow

single phase rectifier; both halves of the alternating voltage are used to produce x-rays, so the xray output per unit time is twice as large as it is with half wave rectification

this design employs a delta-wound primary transformer with a wye-wound secondary transformer. the output of the secondary windings is rectified with the 6 solid state recti

there are 3 max and min voltages in one complete cycle (1/60 sec). when rectified, there will be 6 positive max voltages per cycle

this circuit is still a 6 pulse circuit
has fixed potential to ground, an advantage over the six-rectifier circuit

looks similar to the 6 pulse, the difference is that the secondary is not a double wye connection; it is a wye and a delta connection

when a delta and a wye winding are connected together in the secondary, the output of the data will lag the wye by 30 degrees. the result of this is that the output of one winding will fill in the ripple of the other

is the variation in the voltage across the xray tube expressed as a percentage of the maximum value

single phase circuit, the ripple factor is _ because the voltage goes from 0 to a maximum value with each cycle

a 6 pulse circuit has a ripple factor of _

a 12 pulse circuit has a ripple factor of _

when the 3 phase generators are operated under load, the ripple factor is _

always greater than the theoretical ripple

the load ripple factor of the 12 pulse - 3 phase system is about _