1.9 n: Special Adjustments
228
YASKAWA ELECTRIC
SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
• As regenerative energy is mainly dissipated as heat in the motor, the motor temperature
will rise if overexcitation deceleration is applied frequently. In such cases, make sure the
motor temperature does not exceed the maximum allowable value or consider using a
braking resistor option instead.
• The drive decelerates at the active deceleration time. Make sure to set this time so that no
overvoltage (ov) fault occurs.
• When a Run command is entered during overexcitation deceleration, overexcitation
operation is cancelled and the drive will reaccelerate to the specified speed.
• Do not use overexcitation deceleration in combination with a braking resistor option.
• Overexcitation deceleration can not be used in Open Loop Vector for PM motors.
Use parameters n3-13 through n3-23 for adjusting overexcitation deceleration.
■
n3-01: High Slip Braking Deceleration Frequency Width
Sets the step width for frequency reduction during HSB. Increase this value if DC bus
overvoltage (ov) occurs during HSB.
■
n3-02: High Slip Braking Current Limit
Sets the maximum current to be output during an HSB stop as a percentage of motor rated
current (E2-01). Reducing the current limit increases the deceleration time. Make sure that
this value does not exceed 150% of the drive’s current rating.
■
n3-03: High Slip Braking Dwell Time at Stop
When the motor reaches a relatively low speed at the end of HSB, the output frequency is
kept at the minimum output frequency E1-09 for the time set in n3-03. Increase this time if
the inertia is very high and the motor is still coasting after HSB is complete.
■
n3-04: High Slip Braking Overload Time
Sets the time required for an HSB overload fault (OL7) to occur when the drive output
frequency does not change for some reason during an HSB stop.
No.
Name
Setting Range
Default
n3-01
High Slip Braking Deceleration Frequency Width
1 to 20%
5%
No.
Name
Setting Range
Default
n3-02
High Slip Braking Current Limit
100 to 200%
150%
No.
Name
Setting Range
Default
n3-03
High Slip Braking Dwell Time at Stop
0.0 to 10.0 s
1.0 s
Summary of Contents for OYMC V1000
Page 2: ...2 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive V1000 PRELIM Programming Manual...
Page 8: ...8 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive V1000 PRELIM Programming Manual INDEX 393...
Page 407: ...YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive V1000 PRELIM Programming Manual 407...