Q2 Q2A, Техническое руководство

Страница: 310 / 866

7.10 Troubleshooting Without Fault Display
310 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
Causes Possible Solutions
The voltage insulation between motor phases is not sufficient. • Use a motor with a voltage tolerance that is higher than the maximum voltage surge.
• Use a drive-dedicated motor that is rated for use with AC drives for applications that use a
motor on drives rated higher than 400 V class.
•
Install an AC reactor on the output side of the drive and set C6-02 = 1 [Carrier Frequency
Selection = 2.0 kHz] .
Note:
When the motor is connected to the drive output terminals U/T1, V/T2, and W/T3, surges
occur between the drive switching and the motor coils. These surges can be three times the
drive input power supply voltage (600 V for a 200 V class drive, 1200 V for a 400 V class
drive).
The air around the motor is too hot.
•
Measure the ambient temperature.
•
Decrease the temperature in the area until it is in the specified temperature range.
The motor fan stopped or is clogged. • Clean the motor fan.
• Make the drive environment better.
◆
The Correct Auto-Tuning Mode Is Not Available
Causes Possible Solutions
The desired Auto-Tuning mode is not available for the selected control
mode. Change the motor control method with parameter A1-02 [Control Method] .
◆
The Motor Stalls during Acceleration or Accel/Decel Time Is Too Long
Causes Possible Solutions
The drive and motor system reached the torque limit or current suppression
will not let the drive accelerate. • Decrease the load.
• Use a larger motor.
Note:
Although the drive has a Stall Prevention function and a Torque Compensation Limit
function, accelerating too fast or trying to drive a load that is too large can exceed the limits
of the motor.
Torque limit is set incorrectly. Set the torque limit correctly.
The acceleration time setting is too short. Check the values set in C1-01, C1-03, C1-05, or C1-07 [Accel Time 1, Accel Time 2, Accel Time
3, or Accel Time 4[ and set them to applicable values.
The load is too heavy.
•
Increase the acceleration time.
•
Examine the mechanical brake and make sure that it is fully releasing.
•
Decrease the load to make sure that the output current stays less than the motor rated current.
•
Use a larger motor.
Note:
• In extruder and mixer applications, the load can increase as the temperature decreases.
• Although the drive has a Stall Prevention function and a Torque Compensation Limit
function, accelerating too fast or trying to drive a load that is too large can exceed the limits
of the motor.
The frequency reference is low.
•
Examine E1-04 [Max Output Frequency] and increase the setting if it is set too low.
•
Examine U1-01 [Frequency Reference] for the correct frequency reference.
•
Examine the multi-function input terminals to see if a frequency reference signal switch has
been set.
• Examine the low gain level set in H3-03 [AI1 Gain Setting], H3-11 [AI2 Gain Setting], H3-07
[AI3 Gain Setting] if you use MFAI.
The frequency reference is set incorrectly. When H3-02, H3-10, H3-06 = 5 [AI1 Function Selection, AI2 Function Selection, AI3 Function
Selection = Freq Gain] are set, see if voltage (current) has been set.
• Check the values set in H3-02, H3-10, and H3-06 .
• Use U1-13 [Terminal AI1 Input Lv], U1-14 [Terminal AI2 Input Lv], and U1-15 [Terminal
AI3 Input Lv] to make sure that the analog input values set to terminals AI1, AI2, and AI3 are
applicable.
The motor characteristics and drive parameter settings are not compatible.
•
Set the correct V/f pattern to agree with the characteristics of the motor.
•
Examine the V/f pattern set in E1-03 [V/f Pattern Selection] .
•
Perform Rotational Auto-Tuning.
The drive is operating in vector control mode, but Auto-Tuning is not
completed.
•
Do Auto-Tuning.
•
Calculate motor data and reset motor parameters.
•
Set A1-02 = 0 [Control Method = V/f Control] .
Parameter A1-02 = 4 [Control Method = Adv OLVector] and the speed
estimation response is too slow.
Increase the value set in n4-65 [HF FlxEstim Response] in 0.1-unit increments.
The Stall Prevention level during acceleration setting is too low. Increase the value set in L3-02 [StallP Level@Accel] .
Note:
If the L3-02 value is too low, the acceleration time can be unsatisfactorily long.