Enhanced torque-speed operation using advanced field weakening
- Any application that work in velocity mode.
- Systems that need higher velocity and have voltage limitation.
Elmo’s “Smart control” servo drives using Field Weakening technique to control the Lead-Lag between the back electromotive force (speed) and the current (torque) for optimum Speed-Torque performance.
Elmo’s “Smart Control” servo drives are designed to provide better servo performance and help achieving even higher velocity with your existing electrical power supply.
Before: Motor without phase advance function:
A. Drive velocity command 900,000cnt/sec –
B. Motor actual velocity – 848,000cnt/sec – Due to bus voltage limitation, the motor cannot reach the velocity command
*Actual velocity cannot trace the velocity command due to voltage bus limitation
After: Motor with phase advance function (same application):
A. Drive velocity command is 900,000cnt/sec
B. Motor actual velocity is 900,000cnt/sec – Due to phase advance function the motor actual velocity can reach the velocity command.