UNIFREM v.3.41x
10 May 2017
Page 16 from 180
Name [ID]
Description
Dim.
Rpm [68]
Motor revolutions per minute. For correct displaying of this parameter, it is neccesary to
set up Nom. revolutions [356] (page 44) correctly, according to the nameplate.
This quantity is not affected by motor slip, it corresponds to the frequency setpoint.
RPM
Voltage
DC
[46]
Voltage of the DC link. In a steady-state, the voltage gains its value near 1.41 x supply
voltage RMS, which corresponds with he nominal voltage of the converter. During the
braking, it can rise to the value of BM operating voltage [377] (page 73).
V
Voltage
MT
[73]
Voltage on the motor terminals is not exactly measured quantity, it is evaluated from
PWM modulation index and DC link voltage Voltage DC [46] (page 16).
V
Current
MT
[42]
RMS value of the motor current.
A
Cos Phi [67]
Motor power factor. Positive values indicate motoric operation and negative values
indicate regenerative motor operation.
Torque [69]
Mechanical torque on the motor shaft. The value of torque is evaluated by the
mathematical motor model; its accuracy is influenced mainly by the parameters Rotor
resistance [439] (page 45), Mutual inductance [441] (page 45) and Nom. revolutions
[356] (page 44). Torque saturation is defined by the parameter Torque setpoint [920]
(page 52).
Mag.
Flux
[71]
Rotor magnetic flux. Defines the level of motor excitation. Unless the field-weakening is
in effect, the value should be close or equal to Magnetic Flux setpoint [452] (page 63).
Wb
Modulation
index [768]
PWM duty cycle of the switching power elements.
%
4.2.1 Power and energy
Group of parameters number [486]
Diagnostic group of quantities dealing with the energy indicators (power, consumption, losses).
MENU \ DIAGNOSTICS \ CONTROL \ POWER AND ENERGY
Name [ID]
Description
Dim.
Input power [70]
Active motor input power of the motor without considering any losses.
W
Power [66]
Active motor power, evaluated from voltage, current and power factor of the motor. W
kWh
Consumption
[429]
Number of consumed kWh. This value can be reset by the command Reset the
consumption [897] (page 48).
kWh
MWh
Consumption
[430]
Number of consumed MWh. This value can be reset by the command Reset the
consumption [897] (page 48).
MWh
Power restriction
[1092]
Coefficient of power restriction from external effects.
At maximal allowed power or current the value 1 is acquired and when power
restriction is in effect, this value is decreased to 0. Individual conditions of the power
restriction can be selected in Power restriction (PR) [766] (page 74).
4.2.2 Additional quantities
Group of parameters number [534]
Additional and derived quantities for special use.
MENU \ DIAGNOSTICS \ CONTROL \ ADDITIONAL QUANTITIES
Name [ID]
Description
Dim.
Freq.
INV
ramp
[487]
Frequency on the ramp block output. Represents the speed controller (SC)
reference in the vector control mode.
Hz
Freq. INV abs. [472]
Frequency on the converter output in an absolute value.
Hz
Rpm behind the
transmission [907]
Rotation speed behind the transmission. To display it correctly, it is necessary to
correctly enter the parameter Transmission ratio [888] (page 47).
RPM
Motor
rotation
speed [1130]
Rotation speed on the motor shaft. For a correct display, it is necessary to
configure the motor parameters according to the motor nameplate and correctly
identify Stator resistance [345] (page 45) for the slip model.
This value is affected by the actual motor slip and corresponds with the actual
rotor speed.
RPM
