- 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 configuration
The following table specifies the configuration parameters of the Motor Control
Interface function.
Parameter Description
Motoring torque lim1 Defines the motoring torque limit (or maximum value of
the variable limit specified by Adj mtr trq lim sel) when the
value of the Boolean signal selected by Torque lim 2 sel
is False. Per unit
Motoring torque lim2
Defines the motoring torque limit (or maximum value of
the variable limit specified by Adj mtr trq lim sel) when the
value of the Boolean signal selected by Torque lim 2 sel
is True. Per unit
Regen torque lim 1 Defines the generating torque limit (or maximum value of
the variable limit specified by Adj gen trq lim sel) when
the value of the Boolean signal selected by Torque lim 2
sel is False. Per unit
Regen torque lim 2
Defines the generating torque limit (or maximum value of
the variable limit specified by Adj gen trq lim sel) when
the value of the Boolean signal selected by Torque lim 2
sel is True. Per unit
Current limit 1 Defines the current limit adjust (or maximum value of the
variable adjust specified by Adj cur lim ref sel) when the
value of the Boolean signal selected by Torque lim 2 sel
is False. Per unit
Current limit 2
Defines the current limit adjust (or maximum value of the
variable adjust specified by Adj cur lim ref sel) when the
value of the Boolean signal selected by Torque lim 2 sel
is True. Per unit
Flux ref ratio setpt Defines the flux reference adjust value when the variable
adjust selector Flux ref ratio sel is Unused.
Function description
The variable Torque ref pre limit represents the primary torque reference signal from
the application layer of drive functionality, and is provided by the Speed/Torque
Regulator. The Speed/Torque Regulator serves as an important focal point for speed
and torque regulation systems. This signal is limited according to application torque
limits. Next it is converted to a torque-producing current command by a torque
compensation function, and then it is further limited according to a combination of
application and motor control current limiting functions.
Application limits are defined for motoring torque, generating torque, and current
magnitude. For each type of limit a pair of fixed limit values can be configured, the
dynamic selection of which is driven by a common user-specified Boolean signal.
Each type of limit alternatively can be driven as a variable limit by a user-specified
signal; this variable limit value is bounded between zero and the active fixed limit
value. Application limits are defined as per-unit values. One per-unit torque is
defined as Motor rated power at Motor rated rpm; one per-unit current is defined as
Motor rated current