Drive Duty Mode And Carrier Frequency Selection: C6-01 And C6-02 - YASKAWA V1000 Series Technical Manual

4.6 Basic Drive Setup Adjustments
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Drive Duty Mode and Carrier Frequency Selection: C6-01 and C6-02

Drive Duty Mode Selection: C6-01
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The drive has two different duty modes from which to select based on the load characteristics. The drive rated current, overload capacity, carrier frequency,
and maximum output frequency will change depending upon the duty mode selection. Use parameter C6-01 (Duty Cycle) to select Heavy Duty (HD) or
Normal Duty (ND) for the application. The factory setting is ND.
HD and ND Mode Selections
Mode
C6-01
Characteristics
Use HD Rating is designed applications requiring a high overload tolerance
Application
with constant load torque. Such applications include extruders, conveyors and
cranes.
Overload capability (OL2) 100% continuous, 150% of drive rated current for 60 s
L3-02 Stall Prevention during
Acceleration
L3-06 Stall Prevention during Run
Note: By selecting HD/ND motor parameters E2 and E4 are changed to values for the maximum applicable motors.
Carrier Frequency Selection: C6-02
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Fixed Carrier Frequencies
The carrier frequency can be set using parameter C6-02 as shown in table below.
Parameter Name
C6-02 Carrier frequency
Note: Settings 7 through A for parameter C6-02 use a Swing PWM equivalent to a 2 kHz audible noise. This function turns the motor noise into a less obtrusive white noise.
Note: The upper limit for the carrier frequency is determined by drive capacity.
Precautions when setting parameter C6-02:
Symptom
Speed and torque are unstable at low speeds.
Noise from the drive is affecting peripheral devices.
Excessive leakage current from the drive.
Wiring between the drive and motor is too long.
Motor acoustic noise is too loud.
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to the table below.
Wiring Distance
C6-02 (Carrier Frequency Selection)
Note: When using PM Open Loop Vector control with long cable lengths, set the carrier frequency to 2 kHz (C6-02 = "1"). Use V/f control if the motor cable exceeds 100 m.
User Defined and Variable Carrier Frequency
Set parameter C6-02 to "F" to set carrier frequency values between fixed values.
In Open Loop Vector and PM motor control the desired value can be set in parameter C6-03.
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 up as shown
Note: Set both C6-03 and C6-04 to the same value or set C6-05 to 0 to keep the carrier frequency at a constant level. C6-03 sets the Carrier frequency upper limit.
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Refer to Specifications on page 281
HD Rating
0
Overload
150 %
Rated Load
100 %
0 Motor Speed
150%
150%
Description
1 : 2.0 kHz
2 : 5.0 kHz
3 : 8.0 kHz
4 : 10.0 kHz
5 : 12.5 kHz
6 : 15.0 kHz
7: Swing PWM1
8: Swing PWM2
9: Swing PWM3
A: Swing PWM4
F : User defined (C6-03 to C6-05)
<1>
Up to 50 m
1 to A (15 kHz)
for details about the rated current.
120 %
100 %
100 %
Use ND Rating for applications in which the torque requirements drop along
with the speed. Examples include fans or pumps where a high overload tolerance
is not required.
100% continuous, 120% of drive rated current for 60 s
Lower the carrier frequency.
Increase the carrier frequency or use Swing PWM.
Up to 100 m
1 to 2, 7 to A (5 kHz)
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
ND Duty Rating
1
Overload
Rated Load
0
Motor Speed 100 %
120%
120%
Setting Range
1 to F depends on drive size
Remedy
Greater than 100 m
1, 7 to A (2 kHz)
Figure 4.23 .
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