YASKAWA OYMC V1000, Programming Manual

Page: 49 / 408

1.2 b: Application
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 49
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b2-08: Magnetic Flux Compensation Capacity
Sets the magnetic flux compensation as a percentage of the no-load current value (E2-03)
and can be used to increase the motor flux when the motor is started up.
This parameter allows the magnetizing motor flux to be boosted when starting the motor and
thereby facilitate a quick ramp-up of the torque reference and magnetizing current reference
in order to reduce motor slip during start. This flux level will be applied below the minimum
output frequency set to E1-09 until the DC Injection time at start (b2-03) expires. It may be
used to compensate for reduced starting torque due to motor circuit inefficiencies.
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b2-12: Short Circuit Brake Time at Start
Short-Circuit braking can be used in Open Loop Vector for PM motors. By shorting all three
motor phases it produces a braking torque in the motor and can be used to stop a coasting
motor before starting it.
Parameter b2-12 sets the time for Short-Circuit Brake operation at start. Disabled when set
to 0.00 s.
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b2-13: Short Circuit Brake Time at Stop
The Short-Circuit braking described for parameter b2-12 can also be applied at the end of
deceleration in order to completely stop high inertia loads. Short circuit braking is initiated
when the output frequency falls below the higher of the values b1-02 and E1-09.
Parameter b2-13 sets the time for Short-Circuit brake operation at stop. Disabled when set to
0.00 s.
No. Name Setting Range Default
b2-04 DC Injection Braking Time at Stop 0.00 to 10.00 s 0.50 s
No. Name Setting Range Default
b2-08 Magnetic Flux Compensation Capacity 0 to 1000% 0%
No. Name Setting Range Default
b2-12 Short Circuit Brake Time at Start 0.00 to 25.50 s 0.00 s
No. Name Setting Range Default
b2-13 Short Circuit Brake Time at Stop 0.00 to 25.50 s 0.50 s