TECO F510 series - Page 249

4-160
07 - 06 (Braking Start Frequency)
or 01 - 08 (Fmin)
SC
Braking
Output
frequency
Time
DC
Braking
07-34 07-16
SC
Braking
DC
Braking
07-35 07-08
Figure 4.4.47b PMSLV braking action
07- 07
DC Injection Braking Current
Range
【
0~100】%
DC Injection braking current as percentage of the inverter rated current. Increasing this level will increase
the amount of heat generated by the motor windings. Do not set this parameter higher than the level
necessary to hold the motor shaft.
07- 08 DC Injection Braking Time at Stop
Range
【
0.00~10.00】Sec
Duration of DC injection braking is during a stop operation. DC injection braking at stop is disabled when
parameter 07-08 is set to 0 sec.
07- 16
DC Injection Braking Time at Start
Range
【
0.00~100.00】Sec
Duration of DC injection braking is during a start operation. DC injection braking at start is disabled when
parameter 07-16 is set to 0 sec.
DC Injection Braking Operation
When DC Injection braking is active DC voltage is applied to the motor, increasing the braking current and
resulting in an increase in the strength of the magnetic field trying to lock the motor shaft.
To enable DC injection braking during a start operation set the DC injection braking current (07-07) and
the DC injection braking time (07-16) at start to a value greater than 0. DC injection braking at start can be
used to prevent “wind milling effect” in fan applications.
To enable DC injection braking during a stop operation set the DC injection braking current (07-07) and the
DC injection braking time at stop (07-08) to a value greater than 0.
Notes:
- When parameter 07-16 is set to 0 sec (DC injection braking off). the inverter will start from the minimum
output frequency.
- Increasing the DC braking time (07-08, 07-16) can reduce the motor stop time.
- Increasing the DC braking current (07-07) can reduce the motor stop time.
- During stop operation: If the DC braking start frequency < minimum output frequency (01-08), DC
braking is activated when the output frequency reaches the minimum output frequency level.