Losses Compensation Gain; Svc Slip Adjust; Svc Sync Direction - Reliance electric GV3000/SE Instruction Manual

U.028

Losses Compensation Gain

Parameter Range: 0.0 to 1.000
Default Setting: 0.0 (Disable losses compensation)
Parameter Type: Tunable (at rest or during operation)
Refer to: U.026 Current Compounding Gain
U.027 Inertia Compensation Gain
Description: This parameter specifies the gain applied to the speed loop reference signal to
generate the losses compensation signal. The result is added to the speed PI
output to produce the torque reference signal.
Losses compensation is the scaled output of the speed loop S/Ramp block (speed
reference). It is added to the speed loop output and the inertia compensation signal
to produce the final torque reference.
Refer to the speed loop block diagram Figure 6-1a.
U.030

SVC Slip Adjust

Parameter Range: 0.50 to 1.50
Default Setting: 1.00
Parameter Type: Tunable (at rest or during operation)
Description: This parameter adjusts the slip compensation to match the operating temperature of
the motor.
This feature applies to SVC operation only.
For SVC operation, in the absence of a speed feedback device, operation of the
speed loop is based on an estimated speed feedback. Estimated speed feedback is
based on knowing the slip of the motor, which changes with motor temperature.
This parameter is provided to accommodate various operating conditions.
For a cold motor, the typical value should be 0.80. For a hot motor, the value should
be 1.0
U.031

SVC Sync Direction

Parameter Range: OFF = Disable synchronization
F
r
Fr
rF
Default Setting: OFF
Parameter Type: Configurable (at standby only)
Description: When starting into a rotating load is required, this parameter selects the direction in
which the drive will search in order to synchronize to motor speed.
WARNING: When starting with search enabled, there will be a several second
delay, and the motor may drift in the forward and reverse direction, before the
motor begins operating in the desired direction even if reverse has been disabled
in P.027. Stay clear of rotating machinery. Failure to observe this precaution could
result in bodily injury.
Note that when Forward/Reverse Configuration (P.027) is set to 1, setting this
parameter to r, Fr, or rF may still cause the motor to operate in the reverse
direction.
6 - 18
6 - VECTOR REGULATION MODE
= Search starts in motor forward direction
= Search starts in motor reverse direction
= Search starts in motor forward then reverse direction
= Search starts in motor reverse then forward direction
GV3000/SE 49'1329 e