- General Electric Computer Accessories User Manual

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• Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Motor Control Interface
The Motor Control Interface function describes the main signals with which the
application layer of drive functionality controls the inner motor control algorithm.
The primary interface is represented by Torque ref pre limit, which is constrained by
limits and transformed into a torque-producing current command Torque current ref.
A secondary interface is represented by the Flux ref ratio signal, which provides
limited capability for advanced applications to modify the motor flux reference.
Function inputs
The following table specifies the input parameters of the Motor Control Interface
function.
Parameter Description
Torque lim 2 sel Selects the Boolean signal that switches between the two
alternate sets of torque and current limit parameters.
Adj mtr trq lim sel
Selects a variable motoring torque limit signal, used in place
of (but limited by) the active constant limit parameter.
Adj gen trq lim sel
Selects a variable generating torque limit signal, used in
place of (but limited by) the active constant limit parameter.
Adj cur lim ref sel Selects a variable current limit adjust signal, used in place of
(but limited by) the active constant limit adjust parameter.
Flux ref ratio sel Selects a variable flux reference adjust signal, used in place
of the constant adjust parameter Flux ref ratio setpt.
The following table specifies the input variables of the Motor Control Interface
function.
Variable Description
Torque ref pre
limit
Primary torque reference signal from the application layer of
drive functionality prior to motor control interface torque
limits. Newton-meters or Pound-feet
Torque enable req Torque reference enable Boolean command from the core
drive sequencer necessary for the propagation of non-zero
torque-producing current references to the motor control
algorithm.
Flux current, avg
Flux producing component of current feedback utilized as a
quadrature component in the transformation of the
magnitude current limit to the torque-producing current limit.
RMS amps