YASKAWA OYMC V1000

1.3 C: Tuning
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 91
Parameter Details
1
Note: If the motor cable is fairly long when using PM Open Loop Vector, set the carrier frequency to 2
kHz (C6-02 = 1). Switch to V/f Control if the cable is longer than 100 m.
■ C6-03/C6-04/C6-05: Carrier Frequency Upper Limit / Lower Limit /
Proportional Gain
Use these parameters to set a user defined or a variable carrier frequency. To set the upper
and lower limits, first make sure that C6-02 = F.
Setting a Fixed User Defined Carrier Frequency
A carrier frequency between the fixed selectable values can be entered in parameter C6-03
when C6-02 is set to “F”. In V/f Control parameter C6-04 must also be adjusted to the same
value as C6-03.
Setting a Variable Carrier Frequency (V/f Control only)
In V/f Control the carrier frequency can be set up to change linearly with the output
frequency. In this case the upper and lower limits for the carrier frequency and the carrier
frequency proportional gain (C6-03, C6-04, C6-05) have to be set as shown in Figure 1.30.
Symptom
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to the table below.
<2> In Normal Duty default setting is 7 (Swing PWM), equivalent to setting 2 kHz. Increasing the carrier frequency is
fine when using the drive is set for Normal Duty, but remember that the drive rated current falls when the carrier
frequency is increased.
Remedy
Speed and torque are unstable at low speeds.
Lower the carrier frequency.
Noise from the drive is affecting peripheral devices.
Excessive leakage current from the drive.
Wiring between the drive and motor is too long.
<1>
Audible motor noise is too loud.
Increase the carrier frequency or use Swing
PWM.
<2>
Wiring Distance Up to 50 m Up to 100 m Greater than 100 m
C6-02 (Carrier Frequency Selection) 0 to 6 (15 kHz) 0 to 4 (10 kHz) 1, 7 to A (2 kHz)
No.
<1> The default value is determined by the control method (A1-02) as well as the drive capacity (o2-04), and is
reinitialized when the value set to C6-01 is changed.
Parameter Name Setting Range Default
C6-03 Carrier Frequency Upper Limit 1.0 to 15.0 kHz
<1>C6-04 Carrier Frequency Lower Limit (V/f only) 1.0 to 15.0 kHz
C6-05 Carrier Frequency Proportional Gain (V/f only) 0 to 99