Yaskawa Matrix Converter - Manual (Page 227)

6
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„ Estimated Speed Search
The time chart for estimated speed searches is shown below.
Search at Startup
The time chart for when speed search at startup and speed search to multi-function input terminals is shown
below.
Fig 6.43 Speed Search at Startup (Estimated Speed)
Speed Search after Short Baseblock (during Power Loss Recovery, etc.)
• Loss Time Shorter Than the Momentary Power Loss Minimum Baseblock Time (L2-03)
Fig 6.44 Speed Search after Baseblock (When Estimated Speed: Loss Time Is Set in L2-03)
off on
b3-02
1.0 s
Run Command
Output frequency
Output current
Start using
speed detected
Set frequency
reference
* Lower limit set using Speed Search Delay Time (b3-05).
Minimum Baseblock Time (L2-03)
Note: If the stopping method is set to coast to stop, and the Run Command turns on in a short time,
the operation may be the same as the search in External Speed Search Command 2.
AC power supply
Output frequency
Output current
off on
Start using
speed detected
Set frequency
reference
Minimum Baseblock Time (L2-03)
10 ms
* After AC power supply recovery, motor waits for the
minimum Speed Search Delay Time (b3-05). *