Yaskawa Matrix Converter User Manual

Page 98

Notes on Tuning the MxC

Tuning Procedures

If the torque is approximately 12 Hz and insufficient, tune the MxC as follows.

Assuming that the torque is insufficient in a middle frequency, calculate the middle output voltage using the
following formula.

Settings must be within the following ranges:
VC: Middle frequency (E1-08)
FB: Middle output frequency (E1-07)
FA: Base frequency (E1-06)
Vmax: Maximum output voltage (E1-05)
K: 1.1 to 1.4

Open loop
vector
control
(A1-02 = 2)

Slip Compensation
Gain (C3-01)

• Improving speed

accuracy

1.0

0.5 to 1.5

• Increase the setting if

speed response is slow.

• Reduce the setting if the

speed is too fast.

Flux Vector
Control
(A1-02 = 3)

ASR Proportional
Gain 1 (C5-01) and
ASR Proportional
Gain 2 (C5-03)

• Torque and speed

response

• Controlling hunting

and oscillation

20.00

10.00 to
50.00

• Increase the setting if

torque or speed response is
slow.

• Reduce the setting if hunt-

ing or oscillation occurs.

ASR Integral Time 1
(C5-02) and
ASR Integral Time 2
(C5-04)

• Torque and speed

response

• Controlling hunting

and oscillation

0.500 s

0.300 to
1.000 s

• Reduce the setting if the

torque or speed response is
too slow.

• Increase the setting if hunt-

ing or oscillation occurs.

ASR Gain Switching
Frequency (C5-07)

Switching the ASR
proportional gain and
integral time accord-
ing to the output fre-
quency

0.0 Hz

0.0 to max
output fre-
quency

Set the output frequency at
which to change the ASR
proportional gain and inte-
gral time when the same val-
ues cannot be used for both
high-speed and low-speed
operation.

ASR Primary Delay
Time Constant
(C5-06)

• Controlling hunting

and oscillation

0.004 s

0.004 to
0.020 s

Increase the setting if
machine rigidity is low and
the system vibrates easily.

Table 4.3 Adjusted Parameters (Continued)

Control

Method

Parameters

Performance

Default

Recom-

mended

Setting

Adjustment Method

Output Voltage (V)

Frequency (Hz)

VMAX

(E1-05)

(E1-08)

VMIN

(E1-10)

FMIN

(E1-09)

(E1-07)

(E1-06)

FMAX

(E1-04)

VC =

× Vmax × K