Parker AC30V Series, Руководство по эксплуатации продукта

Страница: 261 / 414

Parameter Reference
D-22
AC30V series Variable Speed Drive
minimum
Current limit
Internal limit
Current Limit Output
Current Limit
Parameters::Motor Control::Current Limit
Designed for all Motor Control Modes
This function allows you to set the maximum level of motor rated current (as a % of the user-set Motor Current ) which is allowed to flow before
current limit action occurs. If the measured motor current exceeds the current limit value with a motoring load, the motor speed is reduced to
control the excess load. If the measured motor current exceeds the current limit value with a regenerating load, the motor speed is increased up
to a maximum of
100% Speed in RPM (Scale Setpoint).
The maximum value of current limit for a particular motor is limited by the AC30V current rating.
If a motor of larger rating than the AC30V is connected, then the current limit max value is limited by the AC30V current rating.
If a motor of lower rating than the AC30V is connected, then the current limit max value is limited to 300% (if compatible with the AC30V current
rating) for an induction motor (IM) and to the ratio PMAC Max Current to PMAC Rated Current for a PMAC motor.
% are always expressed as % of the user set Motor Current (rated current of PMAC or IM Motor).
PNO Parameter Descriptions
0305
Current Limit
This parameter sets the level of motor current, as a % of Motor Current (refer to the relevant MOTOR definition , PMAC or IM
function) at which the Drive begins to take current limit action.
0307
Regen Limit Enable
This parameter enables or disables regenerative current limit action.
Note that this parameter only works in open-loop VOLTS / Hz motor control mode.
Functional Description
Internal limit : output of the Stack Inv Time
reduction as a function of electrical
low speed ( < 3Hz ) and as function of
heatsink temperature