IMPULSE•T Instruction Manual – October 2015
5-8
Tuning
These parameters help tune the motor for your application, which includes S-Curve characteristics
for smoother transition during machine acceleration and deceleration. Below are the parameters
included in this section.
• D1 DC Injection
• D9 S-Curve Acceleration/Deceleration
DC Injection
DC Injection can be used to stop a motor whose rotational direction is uncertain at start-up. With
Decel to Stop enabled (B3-03 = 00), the IMPULSE•T drive controls motor deceleration according to
the Decel Time setting upon removal of the run command until output frequency reaches the DC
Injection Braking Start Frequency (0.5 Hz). Then the drive output is turned off and DC injection
current is applied to the motor. The effective DC injection time and current should be set to provide
adequate stopping without excessive motor heating. The DC injection voltage is determined by the
DC injection braking current and motor impedance.
Table 5-8:DC Injection Parameter Settings
Figure 5-4: DC Braking Sequence
Parameter
Code
Name Function Range Initial Value
Access
Level
D1-02 DC Injection Current % of Inverter rated current 0–75% 50 Adv
D1-03 DC Injection Time @ Start DC Injection braking time. 0.00–10.00
sec
0.00 Adv
D1-04 DC Injection Time @ Stop DC Injection braking time
at stop.
0.00–10.00
sec
0.50 Adv
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