Yaskawa Input 6.0 AMPS SERVO DRIVER 400Watt Industrial Sevro Pack SGDE-04VS

SGDA-04VS
SGDA-04VS
SERVO DRIVE
400W
2.6AMP
50/60HZ
AMPLIFIER
SIGMA
200V
POSITION
AVAILABLE
REBUILT SURPLUS
NEVER USED SURPLUS
REPAIR YOURS
24-48 HOUR RUSH REPAIR
2 - 15 DAY REPAIR
2 YEAR RADWELL WARRANTY

 

 

 

 

 

 

For a given source EMF (volts), the current depends on the resistance other circuit, so to obtain more current, the resistance of the circuit has to be reduced.
We can make use of an equivalent ‘magnetic Ohm’s law’ by introducing the idea of reluctance (R). The reluctance gives a measure of how diYcult it is for the magnetic Xux to complete its circuit, in the same way
that resistance indicates how much opposition the current encounters in
the electric circuit. The magnetic Ohm’s law is then Flux ¼ MMF
Reluctance i:e: F ¼ NI R (1:4)
We see from equation 1.4 that to increase the Xux for a given MMF, we need to reduce the reluctance of the magnetic circuit. In the case of the example (Figure 1.6), this means we must replace as much as possible of the air path (which is a ‘poor’ magnetic material, and therefore constitutes a high reluctance) with a ‘good’ magnetic material, thereby reducing the reluctance and resulting in a higher Xux for a given MMF.

 

 

 

The material which we choose is good quality magnetic steel, which for historical reasons is usually referred to as ‘iron’. This brings several very dramatic and desirable beneWts, as shown in Figure 1.7.

 

 

 

 

 

 

 

Firstly, the reluctance of the iron paths is very much less than the air paths which they have replaced, so the total Xux produced for a given MMF is very much greater. (Strictly speaking therefore, if the MMFs
and cross-sections of the coils in Figures 1.6 and 1.7 are the same, many more Xux lines should be shown in Figure 1.7 than in Figure 1.6, but for the sake of clarity similar numbers are indicated.) Secondly, almost all the Xux is conWned within the iron, rather than spreading out into the surrounding air. We can therefore shape the iron parts of the magnetic circuit as shown in Figure 1.7 in order to guide the Xux to wherever it is
needed. And Wnally, we see that inside the iron, the Xux density remains uniform over the whole cross-section, there being so little reluctance that there is no noticeable tendency for the Xux to crowd to one side or another.Firstly, the reluctance of the iron paths is very much less than the air
paths which they have replaced, so the total Xux produced for a given MMF is very much greater. (Strictly speaking therefore, if the MMFs and cross-sections of the coils in Figures 1.6 and 1.7 are the same, many
more Xux lines should be shown in Figure 1.7 than in Figure 1.6, but for the sake of clarity similar numbers are indicated.) Secondly, almost all the Xux is conWned within the iron, rather than spreading out into the
surrounding air. We can therefore shape the iron parts of the magnetic circuit as shown in Figure 1.7 in order to guide the Xux to wherever it is needed. And Wnally, we see that inside the iron, the Xux density remains uniform over the whole cross-section, there being so little reluctance that there is no noticeable tendency for the Xux to crowd to one side or another.

 

 

 

OTHER SUPERIOR PRODUCTS