Bedford B550-2002 - Rated Slip; Vector Slip Compensation Filter; Vector Voltage Filter; Voltage of Zero Speed Control

5
5-55
Pr.106 Rated Slip
Factory Setting: 3.0
Settings 0.00 to 10.00 Hz Unit: 0.01Hz
 Example of Slip calculation: The rated speed of 4 poles/3 φ/ 60Hz/ 220V on the
nameplate is 1710RPM. The rated slip is then: 60-(1710/(120/P))=3Hz. (being P the
number of poles)
Pr.107 Vector Voltage Filter
Factory Setting: 10
Settings 5 to 9999 Unit: 2ms
Pr.108 Vector Slip Compensation Filter
Factory Setting: 50
Settings 25 to 9999 Unit: 2ms
 This parameter sets the low-pass filter in vector control.
 Example: Pr. 107 = 10 X 2ms =20ms, Pr. 108 = 50 X 2 ms =100ms.
Pr.109 Selection for Zero Speed Control
Factory Setting: 00
Settings 00 No output
01 Control by DC voltage
 This parameter is used to select the control method at zero speed. If set to 01, the
voltage in Pr.110 is used for holding torque.
Pr.110 Voltage of Zero Speed Control
Factory Setting: 5.0
Settings 0.0 to 20.0 % of Max. output voltage (Pr.05) Unit: 0.1%
 This parameter should be used in conjunction with Pr.109.
 Example: if Pr.05 = 100 and this parameter is set to 20.0, the level of output voltage is
100 X 20.0% = 20.
Pr.111
Deceleration S Curve Factory Setting: 00
Settings 00 to 07
 When this parameter is set differently to zero, it selects a deceleration S-curve and
overrides Pr.14. Otherwise, Pr.14 sets the deceleration S-curve.
Note: From the diagram shown below, the original setting accel/decel time will be for
reference when the function of the S-curve is enabled. The actual accel/decel time will
be determined based on the S-curve selected (1 to 7).
B550 Series sensorless vector frequency drive