Yaskawa 3.96KW AC servo drives Input 24 AMPS Industrial ServoPack SGDB-44ADG-Y451

Yaskawa 3.96KW AC servo drives Input 24 AMPS Industrial ServoPack SGDB-44ADG-Y451

 

 

 

 

Quick Details

 

 

 

 

 

Disadvantage - Initial Cost
The initial cost of an ASD is generally greater than other types of variable speed controls mentioned
and is a common obstacle for a process plant to install the ASD.
C Pay-back from energy savings has traditionally been used to justify installation of ASD’s however improvements in process control are increasingly being considered.
C The energy savings payback is generally low for applications where the average speed requirement is near the motors rated speed level.
C As a general rule, a payback of 2 to 3 years typically justifies the use of an ASD. Disadvantage - Maintenance ASD's, like many other solid state electronic devices, require special troubleshooting knowledge for operations and maintenance personnel.
C Maintenance personnel can obviously look at mechanical type devices to see if the devices have failed or easily diagnose the cause of the failure.
C ASD's have made significant advances in their diagnostic capability, but still may require additional training for maintenance personnel not familiar with solid state design technology. Disadvantage - Motor Heating at Low Speed Operation ASD’s used to run constant torque loads at slow speeds, have a high potential for motor heating.
C No matter what speed the motor runs, the current draw to the motor will be the same with a constant torque load.
C At low speeds, the cooling fan on the motor produces less cooling air.
C If the motor produces the same amount of heat at low speed due to the constant torque load and there is less cooling air, the motor will overheat.