GE 2300 V Regulator function, Spd reg pos err lim & Spd reg neg err lim, Speed reg output is zero

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".

3-110 • Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385