4-222
(11)
Setting a low gain for the speed estimator (small proportion (P) gain and high integral
(I)
time) decreases the bandwidth of the speed feedback, may improve speed feedback
interference resulting in a more stable system.
(12)
The default values for the ASR can be used in most applications, no adjustment is required.
Adjusting the low-pass filter time and speed estimator gains requires a good understanding
of the overall system. If a high-speed system response in combination with stable operation is
required consider using SLV control mode.
(13)
Parameter 20-15 sets the gain switch frequency at low-speed and parameter 20-16 sets the
gain switch frequency at high-speed.
(14)
Operating at a speed below 20-15 will result in a larger excitation current for low-speed
operation accuracy. When the frequency reference rises above 20-16, the inverter will output
the rated excitation current at the no-load voltage (02-19).
(15)
For general purpose applications parameter 20-15 should be set to a value of 5~50% of the
motor base frequency. If this value is too high, the inverter output may saturate. Parameter
20-16 should be set to a value of 4Hz or more above the value of 20-08.
(16)
When experiencing speed jitter at high speed and stable operation during mid-range speed
while operating a heavy load (>100%), it is recommended to reduce the no-load voltage
(02-19) or tune the FOC parameters (18-05 ~ 18-06).
(17)
Parameter 20-17 and 20-18 are for compensating speed feedback at low speed and high
speed.
(18)
Use parameter 20-17 to adjust the torque compensation gain for the low speed range. By
tuning 20-17an offset is added to the torque-speed curve. Increase 20-17 when the no-load
speed is lower than the frequency reference. Decrease 20-17 when the no-load speed is
higher than the frequency reference.
The effect on the torque-speed curve from 20-17 is shown as the following figure
Figure 4.3.115 20-17 Effect on the torque-speed curve from
Use parameter 20-18 to adjust the torque compensation gain for middle to high speed range. For
most general purpose applications it is not necessary to adjust the 20-18. The effect on the
torque-speed curve from 20-18 is shown as the following figure 4.3.116.
Figure 4.3.116 Effect on the torque-speed curve from 20-18
Summary of Contents for E510-201-SH
Page 1: ......
Page 28: ...3 14 b 200V 2HP 1 3PH 200V 3HP 20HP 400V 3HP 25HP IP20 NEMA1 ...
Page 29: ...3 15 c 200V 25HP 400V 30HP d 200V 30HP 40HP 400V 40HP 75HP ...
Page 51: ...3 37 3 5 Standard Wiring 10V AI1 AI2 AGND E P P ...
Page 72: ...4 6 4 1 4 Example of keypad operation Example 1 Modifying parameters ...
Page 74: ...4 8 4 1 5 Operation control ...
Page 206: ...4 140 Acceleration Deceleration calculation of mode 2 ...
Page 316: ...4 250 6 Timer mode 6 FLASH Timer mode 2 7 Timer mode 7 FLASH Timer mode 3 ...
Page 424: ...REVISIONS Date Manual Number Revision May 2017 4KA72X645T01 First edition ...
Page 425: ......