Toshiba Tosvert VF-A5 Bedienungsanleitung PDF herunterladen (Seite 53)

(Fundamental Parameters #1)

V/f pattern ®

Parameter setting process when | Pt I is set to 3

Cn.F

CpF]

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

nt.u

Motor rated voltage

nt.F

Motor rated frequency

nt.r-

Motor rated RPM

nt.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 nt.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 (DC ), etc., occur. Then

retry the auto-tuning operation.

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