- General Electric Computer Accessories User Manual

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• Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Function description
The Speed/Torque Regulator function is an important focal point for both Speed and
Torque regulation systems within the drive. The parameter Regulator type configures
the basic regulation mode of the drive, and the variable Speed reg mode reflects the
active regulation state of the drive. Speed reference and feedback signals converge at
the Speed Regulator along with Torque reference and feedforward signals. The
output of the Speed/Torque Regulator function is the primary torque reference
presented to the motor control interface.
The primary modes of operation that may be selected are:
Speed regulator The variable Speed reg fbk is regulated to follow the
variable Speed reg reference according to the
characteristics specified by configuration parameters.
Torque regulator
The variable specified by the parameter Torque ref
select is gated to the output of the Speed/Torque
Regulator function.
Torque, spd override Similar to Torque mode except that speed regulation will
override the torque reference in the event that the
Speed reg error signal exceeds the limits specified by
Spd reg pos err lim & Spd reg neg err lim.
In general the active state is a function of configuration parameters, commands from
the drive sequencer and the application, and key signals within the regulator.
The torque feedforward signal specified by the parameter Torque feed fwd sel is
always added to Speed reg output to form Torque ref pre limit. The Torque ref input
signal specified by the parameter Torque ref select is added conditionally, based
upon the active Speed reg mode and the value of the Boolean signal specified by the
parameter Torque mode sel.
The active states of the Speed/Torque Regulator function are:
Off/Precond Regulator is disabled by the sequencer:
Speed reg output is zeroed, and Torque ref input is
disabled. Internal states are continuously
preconditioned based upon the signal specified by
parameter Spd reg init val sel.
Torque regulator Active Torque mode:
Torque ref input is conditionally enabled to the output
Torque ref pre limit, based upon the value of the
Boolean signal specified by the parameter Torque mode
sel. The speed regulator core is disabled, therefore
Speed reg output is zero.
Speed regulator Active Speed mode:
Speed reg output responds "normally" to the core speed
regulator. Based upon the value of the Boolean signal
specified by the parameter Torque mode sel, the Torque
ref input signal is conditionally added into the output
Torque ref pre limit.
Ovrd/Trq act Active Torque, spd override mode:
Torque mode allowed since Speed reg error is within
limits and the value of the signal specified by the
parameter Torque mode sel is True; spillover speed
action is "armed".