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No.
(Hex.)
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Name
|
Description
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Default
(Range)
|
|
b2-08
(0190)
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Magnetic Flux Compensation Value
|
    
Sets how much current the drive injects when DC Injection Braking at Start starts (Initial Excitation) as a percentage of E2-03 [Motor No-Load Current].
|
0%
(0 - 1000%)
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This parameter is effective when you start a high-capacity motor (a motor with a large secondary circuit time constant). This function can quickly increase motor flux to make high starting torque (a process called initial excitation).
The current level for DC Injection Braking at start changes linearly from the setting of b2-08 to the setting of b2-03 as shown in Figure 1.
Figure 1. DC Current Level during DC Injection Braking at Start
Note:
-
If b2-08 < 100%, flux will develop very slowly.
-
When b2-08 = 0%, the DC current level will be the DC Injection current set in b2-02 [DC Injection Braking Current].
-
If b2-08 is set too high, DC Injection Braking at start can cause a large noise. Adjust b2-08 to decrease the volume to the permitted level.