Yaskawa Matrix Converter User Manual download pdf (Page 315)

6-150

* The setting is given for 200 V class MxCs. Double the voltage for 400 V class MxCs.

Note: 1. Do not change C4-01 (Torque Compensation Gain) from its default of 1.00 when using Open Loop Vector Control.

2. If speeds are inaccurate during regeneration in Open Loop Vector Control, enable Slip Compensation Selection during Regeneration (C3-04 = 1). If

speeds are inaccurate in the high-speed range, enable Output Voltage Limit Operation Selection (C3-05 = 1).

3. Do not use Slip Compensation Gain (C3-01) during V/f Control Method (A1-02 = 0). C3-01 is disabled as a default during V/f Control.

4. The torque and speed response of high-resistance (high-slip) motors are insufficient. Make appropriate adjustments to improve them. Low-resistance

(low-slip) motors are easily subject to hunting and oscillation.

5. The current at start may rise when C4-02 (Torque Compensation Primary Delay Time) is increased. Check the current during startup while adjusting

this parameter.

Flux Vector

Control

(A1-02 = 3)

C5-01

ASR Propor-

tional (P)

Gain 1

• Increases torque and

speed response

• Controls hunting and

oscillation

20.00

10.00 to

50.00

• Torque or speed response

is insufficient: Increase

the setting

• Hunting or oscillation

occurs: Reduce the setting

C5-03

ASR Propor-

tional (P)

Gain 2

C5-02

ASR Inte-

gral (I) Time

• Increases torque and

speed response

• Controls hunting and

oscillation

0.500 s

0.300 to

1.000 s

• Torque or speed response

is insufficient: Reduce the

setting

• Hunting or oscillation

occurs: Increase the set-

ting

C5-04

ASR Inte-

gral (I) Time

C5-07

ASR Switch-

ing Fre-

quency

Switches the ASR pro-

portional gain and inte-

gral time according to

the output frequency.

0.0 Hz (no

switching)

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.

C5-06

ASR Pri-

mary Delay

time

Controls hunting and

oscillation

0.004 s

0.004 to

0.020 s

Machine rigidity is low and

the system vibrates easily:

Increase the setting

V/f Control

Method (A1-

02 = 0)

E1-08

Mid Output

Frequency

Voltage (VC)

• Improves torque at

low speeds

• Controlling shock at

startup

14.0 VAC

13.0 to 16.0

VA C

• Torque is insufficient at

low speeds: Increase the

setting

• Shock at startup is large:

Reduce the setting

E1-10

Min. Output

Frequency

Voltage

(VMIN)

7.0 VAC

7.0 to 10.0

VA C

C4-01

Torque Com-

pensation

Gain

• Improves torque at

low speeds (10 Hz or

lower)

• Controlling hunting

and oscillation for

light loads

1.00 0.50 to 1.50

• Torque is insufficient at

low speeds: Increase the

setting

• Hunting or oscillation

occurs for light loads:

Reduce the setting

n1-02

Hunting-Pre-

vention gain

Controls hunting and

oscillation in middle-

range speeds (10 to 40

Hz)

1.00 0.50 to 2.00

• Torque is insufficient for

heavy loads: Reduce the

setting

• Hunting or oscillation

occurs for light loads:

Increase the setting

Table 6.4 Control-Related Adjustments (Continued)

Control

Method

Parame-

ter Num-

ber

Name Performance

Factory

Setting

Recom-

mended

Setting

Adjustment Method

1 2 ... 310 311 312 313 314 315 316 317 318 319 320 ... 397 398

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Yaskawa Matrix Converter User Manual Page 315

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