YASKAWA GA800 Series, Техническое описание

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12.10 n: Special Adjustment
954 YASKAWA SIEPC71061737B GA800 Drive Technical Reference
braking time. You can use overexcitation deceleration in OLV control and CLV control, but those control methods
decrease the precision of torque control and braking efficiency. Use V/f control for the best results.
•
The drive disables these functions during braking with Overexcitation Deceleration 2:
– Hunting Prevention Function (V/f Control)
–
Torque Limit Speed Control (OLV Control)
■
n3-01: HSB Deceleration Frequency Width
No.
(Hex.)
Name Description
Default
(Range)
n3-01
(0588)
Expert
HSB Deceleration
Frequency Width
Sets the amount by which the output frequency is to be lowered during high-slip braking, as a
percentage of
E1-04 [Maximum Output Frequency] , which represents the 100% value.
5%
(1 - 20%)
When you must detect ov [DC Bus Overvoltage] during high-slip braking, set this parameter to a large value.
■
n3-02: HSB Current Limit Level
No.
(Hex.)
Name Description
Default
(Range)
n3-02
(0589)
Expert
HSB Current Limit Level
Sets the maximum current output during high-slip braking as a percentage of E2-01 [Motor Rated
Current (FLA)] . Also set the current suppression to prevent exceeding drive overload tolerance.
Determined by C6-01, L8-38
(0 - 150%)
Note:
The upper limit of the setting range changes when the setting for C6-01 [Normal / Heavy Duty Selection] changes.
•
150% when C6-01 = 0 [Heavy Duty Rating (HD) for Constant Torque Applications] .
•
110% when C6-01 = 1 [Normal Duty Rating (ND) for Variable Torque Applications] .
When you decrease the setting value for current suppression, it will make the deceleration time longer.
• When you must detect ov [DC Bus Overvoltage] during high-slip braking, set this parameter to a low value.
• If the motor current increases during high-slip braking, decrease the setting value to prevent burn damage in the
motor.
•
The overload tolerance for the drive is 150% for Heavy Duty Rating (HD) and 110% for Normal Duty Rating (ND).
■
n3-03: HSB Dwell Time at Stop
No.
(Hex.)
Name Description
Default
(Range)
n3-03
(058A)
Expert
HSB Dwell Time at Stop
Sets the dwell time, a length of time when high-slip braking is ending and during which the motor
speed decreases and runs at a stable speed. For a set length of time, the drive will hold the actual
output frequency at the minimum output frequency set in
E1-09
.
1.0 s
(0.0 - 10.0 s)
If there is too much inertia or when the motor is coasting to a stop after high-slip braking is complete, increase the
setting value. If the setting value is too low, machine inertia can cause the motor to rotate after high-slip braking is
complete.
■
n3-04: HSB Overload Time
No.
(Hex.)
Name Description
Default
(Range)
n3-04
(058B)
Expert
HSB Overload Time
Sets the time used to detect oL7 [High Slip Braking Overload] , which occurs when the output
frequency does not change during high-slip braking. Usually it is not necessary to change this
parameter.
40 s
(30 - 1200 s)
If a force on the load side is rotating the motor or if there is too much load inertia connected to the motor, the drive
will detect
oL7 .
The current flowing to the motor from the load can overheat the motor and cause burn damage to the motor. Set this
parameter to prevent burn damage to the motor.
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV