Power supply for the aeronautical industry PFC1500W-48

AC/DC

Because servo motors are inductive, they may run highly dynamic motion profiles. As a result, their current demand can vary widely. Surge currents from stand still to maximum load may be extremely high, yet steady state current demand over time may be relatively mild. As a result, proper care should be taken when selecting power supplies. Moog Animatics offers two basic types of power supplies. The chart to the right gives a brief comparison of the two types of supplies As seen in the graph to the right, linear (unregulated) supplies can handle large surge current loads. This is because linear supplies typically contain large output capacitors to handle those surges well. Switch mode supplies (switchers) are highly regulated. They will maintain fixed voltage until they reach maximum load and then will “crowbar” to zero volts to protect the output stages. Linear supplies will slowly drop the output voltage while supplying more and more current. This is the most fundamental difference between switchers and unregulated supplies. Even though a switcher cannot handle the higher current surges, if it can output as much current as you would expect for a given servo application, then it will actually help the servo accelerate much faster. That is because the system voltage will be maintained at maximum level. However, if your servo application requires surge currents in excess of 50 amps or more, the switchers may not be cost effective. For example, getting 50 amps from a Moog Animatics 20 amp supply is easy; getting 50 amps from Moog Animatics switchers would require placing multiple units in parallel. Therefore, it may not be cost effective to do so.