C4: Torque Compensation; C6: Carrier Frequency - YASKAWA P1000 Technical Manual

5.3 C: Tuning
Setting 1: Enabled (6 Hz and above)
Slip compensation is enabled during regenerative operation. It will not be active at output frequencies below 6 Hz.
Setting 2: Enabled (compensation provided wherever possible)
Slip compensation is enabled during regenerative operation and at frequencies as low as 2 Hz. The drive uses the motor rated
slip set to E2-02 to automatically calculate the frequency range where compensation will be disabled.
u

C4: Torque Compensation

The torque compensation function compensates for insufficient torque production at start-up or when a load is applied.
Note: Set the motor parameters and V/f pattern properly before setting torque compensation parameters.
n C4-01: Torque Compensation Gain
Sets the gain for the torque compensation function.
No.
C4-01
n C4-02: Torque Compensation Primary Delay Time 1
Sets the delay time used for applying torque compensation.
No.
C4-02
u

C6: Carrier Frequency

n C6-02: Carrier Frequency Selection
Sets the switching frequency of the drive output transistors. Changes to the switching frequency lower audible noise and reduce
leakage current.
No. Parameter Name
C6-02 Carrier Frequency Selection
<1> The setting range is 1, 2, and F for models 4A0930 and 4A1200
Settings:
C6-02 Carrier Frequency
1 2.0 kHz
2 5.0 kHz
3 8.0 kHz
4 10.0 kHz
Note: Swing PWM uses a carrier frequency of 2.0 kHz as a base, then applies a special PWM pattern to reduce the audible noise.
Guidelines for Carrier Frequency Parameter Setup
Speed and torque are unstable at low speeds
Noise from the drive affects peripheral devices
Excessive leakage current from the drive
Wiring between the drive and motor is too long
Audible motor noise is too loud
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to
<2> The default carrier frequency is Swing PWM (C6-02 = 7), using a 2 kHz base. Increasing the carrier frequency is permissible , however the drive
rated current is reduced when the carrier frequency is increased.
Wiring Distance
Recommended setting value for C6-02
180
Parameter Name
Torque Compensation Gain
Parameter Name
Torque Compensation Primary Delay Time 1
C6-02
5
6
7
8
Symptom
<1>
Table 5.14 Wiring Distance and Carrier Frequency
Up to 50 m
1 to F (up to 15 kHz)
Setting Range
<1>
1 to 9; A, F
Carrier Frequency
12.5 kHz
15.0 kHz
Swing PWM 1
Swing PWM 2
Lower the carrier frequency.
Increase the carrier frequency or use Swing PWM.
Table 5.14.
Up to 100 m
1 to 2 (up to 5 kHz),
7 (Swing PWM)
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Setting Range
0.00 to 2.50
Setting Range
0 to 60000 ms
Default
7
C6-02 Carrier Frequency
9 Swing PWM 3
A Swing PWM 4
B to E: No setting possible
F User defined (C6-03 to C6-05)
Remedy
<2>
Greater than 100 m
1 (up to 2 kHz), 7 (Swing PWM)
Default
1.00
Default
200 ms