237-00156 SofTec Microsystems SRL, 237-00156 Datasheet - Page 91

• Manufacturer Part Number: 237-00156
• Description: BOARD ISOLATION FOR ST7
• Manufacturer: SofTec Microsystems SRL
• Type: Optoisolation Boardr

Specifications of 237-00156

• Contents: *
• For Use With/related Products: STMicro ST7FMC Motor Control Device
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6
AK-ST7FMC Control Panel Features
6.4.4 Real-Time Settings
Page 90
Parameter Name
Stator Frequency
Set Voltage
According to V/F
Curve
Voltage
Target Rotor
Frequency
Target Slip
Frequency
Integral
Coefficient (Ki)
Proportional
Coefficient (Kp)
Sampling Time
Reported
Frequency
Table 6.9: AK-ST7FMC Control Panel: AC Motor Real-Time Settings
Open Loop parameter only. Defines the synchronous speed of the
motor. Basically it is the inverter output frequency.
This value can be set in Hz or RPM (click the “Hz” or “RPM” button
next to the edit box to switch between units).
In Open Loop (and for predictable load systems), this option is useful
to adjust the speed without taking care of the applied voltage (the V/F
curve has been tuned to fit the load). If this option is disabled, then the
voltage can be set in the “Voltage” parameter below.
Open Loop parameter only. For a given stator frequency, this is the
voltage applied to the stator windings (it can be any voltage below the
V/F limit, in other words any voltage within the red area).
Closed Loop parameter only. The target rotor speed (frequency) is the
expected speed (frequency) of the rotor. The Proportional Integral (PI)
control will adjust the stator voltage and frequency according to this
target frequency, the slip frequency and the V/F curve.
This value can be set in Hz or RPM (click the “Hz” or “RPM” button
next to the edit box to switch between units).
Closed Loop parameter only. The slip value to be entered here should
be the slip giving optimum efficiency for the given target rotor
frequency and motor characteristics. The PI control will adjust the
stator voltage and frequency according to this slip frequency, the target
frequency and the V/F curve.
This value can be set in Hz or RPM (click the “Hz” or “RPM” button
next to the edit box to switch between units).
Closed Loop parameter. For beginning with a new motor, it is
recommended to start from 0. The higher the value, the shorter the
time necessary to cancel the static error, but a value too high will
render the system unstable.
Closed Loop parameter. The higher the value, the lower will be the
static error, but a value too high will render the system unstable.
The time interval between two PI control samplings. The lower the
sampling time the better will be the regulation bandwith. However, a
value too low will not increase the system dynamic response above a
certain point, and will consume microcontroller resources.
Only valid in Closed Loop or in Open Loop with speed sensor
feedback. This is the speed (frequency) of the rotor as read by the
speed sensor.
This value can be read in Hz or RPM (click the “Hz” or “RPM” button
next to the value to switch between units).
Parameter Description