MSW Motor Technics MSW-FI-7500 Manuel D'utilisation page 228

Specification of high-performance vector convertor

VF slip compensation gain Factory default

Setting range

VF Slip compensation. It can be compensated induction motor generated when the load increases the

motor speed deviation when the load changes the motor speed can be stable.

VF Slip compensation gain is set to 100.0%, indicating that slip when the motor with a rated load

compensation to the motor rated slip. But the motor rated slip, the drive motor rated frequency group by

P1 and rated speed to get own calculations.

Adjust VF rpm slip compensation gain, generally when the rated load, the motor speed and the target

speed is substantially the same as the principle. When the motor speed and the target value is not the same,

you need to be properly fine-tune the gain.

VF over excitation gain

Setting range

During the deceleration, the over-excitation control bus voltage rise can be suppressed to avoid

overvoltage fault. Greater the over excitation gains, stronger the suppression has effect.

For conditions that in the inverter deceleration process, it is easier to be over-pressured and sounds

alarm, you need to improve the over excitation gain. But if excitation gain is too large, easily lead the

output current to increase; you need to weigh in the application.

For the case of small inertia, deceleration of the motor voltage rise does not appear, it is

recommended that the over excitation gain is 0; For braking resistance occasion, it is also suggested that

over-excitation gain is set to 0.

Voltage % Vb

V1-V3: Multi-speed V / F voltage percentage of segment 1-3

F1-F3: Multi-speed V / F frequency percentage of segment 1-3

Vb: Motor rated voltage Fb: motor rated operating frequency

Factory default

Figure 6-4 Diagram of multi-point V / F curve setting

Parameter description