Xinje VH6 Series - Page 127

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Parameter
Name
Range
P5-15
Slip compensation time constant
0.1~10.0s
The smaller the response time value of slip compensation is set, the faster the response speed is.
Parameter
Name
Range
P5-16
VF over excitation gain
0—200
In the process of inverter deceleration, the over excitation gain can inhibit the rise of bus voltage, but the larger
the over excitation gain is, the larger the output current will increase. In the case of braking resistance or small
inertia, which is not easy to produce overvoltage, it can be set to 0.
Parameter
Name
Range
P5-17
VF oscillation suppression gain
0—100
The gain is selected as small as possible on the premise of effectively suppressing the oscillation, so as to avoid
adverse effects on VF operation. When there is no electrical oscillation, please set the gain to 0. Only when the
motor oscillates obviously, the gain should be increased appropriately. The larger the gain is, the more obvious
the suppression of oscillation is.
When using the function of suppressing oscillation, the parameters of rated current and no-load current should
be accurate, otherwise the effect of VF oscillation suppression is not good.
Parameter
Name
Range
P5-18
VF oscillation suppression mode
0—4
Parameter
Name
Range
P5-19
VF over current stall action current
50%~200%
P5-20
VF over current stall suppression
enable
0: Invalid
1: Valid
P5-21
VF over current stall suppression gain
0~100
P5-22
VF over current stall action current
compensation coefficient
50%~200%
In the high frequency region, the motor drive current is small. Below the rated frequency, the speed of the motor
drops greatly with the same stall current. In order to improve the operation characteristics of the motor, the stall
action current above the rated frequency can be reduced. In some centrifuges with high operation frequency,
several times weak magnetic field and large load inertia are required, this method has a good effect on
acceleration performance.
Transition stall action current over rated frequency = (fs/fn) * k * LimitCur.
fs: running frequency, fn: motor rated frequency, k: P5-22(Current compensation coefficient of double speed
overcurrent stall action), LimitCur: P5-19(overcurrent stall action current).