YASKAWA varispeed G7 CIMR-G7B series Instruction Manual page 276

Current Detection Speed Search (b3-01 = 2 or 3)
The time charts for current detection speed search is shown below.
Speed Search at Startup (b3-01 = 3)
The time chart when speed search at startup or external speed search command is selected is shown below.
Run Command
Output frequency
Output current
Speed Search after Short Baseblock (b3-01 = 2)
The time chart when the Inverter operation is restarted after power has been restored is shown below.
Loss Time Shorter Than Minimum Baseblock Time
•
AC power supply
Output frequency
Output current
Minimum baseblock time (L2-03)
Loss Time Longer Than Minimum Baseblock Time
•
AC power supply
Output frequency
Output current
-70
6
OFF ON
Maximum output
frequency or
set frequency
Minimum baseblock time
(L2-03)
Fig 6.47 Speed Search at Startup (Using Current Detection)
ON OFF
*1
*2
Fig 6.48 Speed Search After Baseblock (Current Detection: Loss Time < L2-03)
ON
Minimum baseblock time
(L2-03)
Fig 6.49 Speed Search After Baseblock (Current Detection: Loss Time > L2-03)
Deceleration time set in b3-03
*
* Lower limit is set using Speed Search Time (b3-05).
Output frequency before power loss
Deceleration
time set in b3-03
b3-02
speed search operating current
*1 Baseblock time may be reduced by the output frequency
immediately before baseblock.
*2 After AC power supply recovery, motor waits for the minimum
Speed Search Wait Time (b2-03).
OFF Output frequency before power loss
Deceleration speed set in b3-03
Speed search operating time
Speed search wait time (b3-05)
Set frequency
reference
b3-02
Set frequency
reference
Set frequency
reference
b3-02