User Manual Instruction Manual

13-38
GV6000 AC Drive User Manual
Brake to Stop
This method uses DC injection of the motor to Stop and/or hold the
load.
On Stop, 3 phase drive output goes to zero (off)
Drive outputs DC voltage on the last used phase at the level
programmed in DC Brake Level (158). This voltage causes a
“stopping” brake torque. If the voltage is applied for a time that is
longer than the actual possible stopping time, the remaining time will
be used to attempt to hold the motor at zero speed.
DC voltage to the motor continues for the amount of time
programmed in DC Brake Time (159). Braking ceases after this time
expires.
After the DC Braking ceases, no further power is supplied to the
motor. The motor may or may not be stopped. The drive has released
control.
The motor, if rotating, will coast from its present speed for a time that
is dependent on the mechanics of the system (inertia, friction, etc).
Ramp to Stop
This method uses drive output reduction to stop the load.
On Stop, drive output will decrease according to the programmed
pattern from its present value to zero. The pattern may be linear or
squared. The output will decrease to zero at the rate determined by
the programmed Maximum Freq (82) and the programmed active
Decel Time x.
The reduction in output can be limited by other drive factors such as
such as bus or current regulation.
When the output reaches zero the output is shut off.
The motor, if rotating, will coast from its present speed for a time that
is dependent on the mechanics of the system (inertia, friction, etc).
Mode Description
Stop
Command
DC Hold Time
(A)(C)(B)
Time
Output Voltage
Output Current
Motor Speed
DC
Hold Level
DC Hold Time
DC
Hold
Level
Stop
Command
Time
Output Voltage
Output Current
Motor Speed
Output Voltage
Output Current
Zero
Command
Speed