Toshiba Tosvert VF-A5 - Manual (Page 53)

F
(Fundamental Parameters #1)
P t
V/f pattern ®
Parameter setting process when | P t I is set to 3
C n . F
C p F]
v/f pattern
1: V/f control (using constant torque load)
2: V/f control
(using variable torque load)
3: Automatic torque boost
4: Automatic torque boost +
energy saving
5: Vector control
6: Vector control +
energy saving
r^Gr.nt
ntp
nt£
nt.t
When 3-5
are selected
No. of motor poles
Motor rated capacity
Motor type
0: Toshiba standard motor
1: Toshiba VF motor
2: Other----------------------------- -
nt. IH Load moment of inertia
0: Small
1: Medium
c r . n t 3; Very large
n t . u Motor rated voltage
n t . F Motor rated frequency
n t . r -
Motor rated RPM
n t . t n
Auto-tuning
0: disabled
1: enabled
Motor requirements when using vector control
1. Motor capacity should be the same as the inverter, or should be a Toshiba general purpose squirrel-
cage type motor or Toshiba constant torque motor that differs by at most 1 rank.
2. No. of motor poles should be 2 to 16.
3. Only one machine should be operated (one motor per inverter).
* The output frequency and set frequency will not match.
* The max. wire length that can be used between the inverter and motor is 30m. If 30m is exceeded, the
torque can be improved during deceleration by using auto-tuning, but the torque will drop slightly near
60Hz.
The vector control function will operate properly with adequate torque and little speed fluctuation when
used below the maximum voltage frequency setting value. However, in situations where the maximum
voltage frequency is exceeded (field-weakening area), the same type of characteristics may not be
achieved. The maximum voltage frequency setting range during vector control use should be between 40
to 120Hz.
The motor rated voltage parameter i n t . u I is used only to calculate motor constants. The inverter’s max.
output voltage will always depend on the maximum voltage I uL lj f I during vector control.
Cautions during auto-tuning
(T) The motor must be completely stopped before executing auto-tuning. Due to motor residual voltage,
an error may occur in the tuning if executed immediately after stopping.
0 The motor will rotate only slightly during auto-tuning, but use caution, as the main voltage will be
applied.
0 Auto-tuning will normally finish within 3 sec. If an error occurs, the inverter will trip and the motor
constants will not be set.
0 Auto-tuning of special motors, such as high-speed or high-slip motors, is not possible.
★ The auto-tuming error (refer to page 121) will be displayed when auto-tuning fails.
* Change the t nfc. /H I setting value if an overvoltage trip ( 0 P) or overcurrent trip ( D C ) , etc., occur. Then
retry the auto-tuning operation.
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