Yaskawa GPD 515/G5 to F7 - Manual (Page 17)

Product Transition Guide
GPD515/G5 to F7
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PL.F7.02.TransitionGuide 6/5/06
Page 17 of 40
Yaskawa Electric America, Inc
Motor speed
Motor voltage
DC-Bus voltage
Motor speed
Motor voltage
DC-Bus voltage
The F7 incorporates a
new braking function called High
Slip Braking (HSB).
By using a method that utilizes
increased rotor slip, the drive
will gain the capability of
stopping up to 50% faster than
without a braking resistor.
All of this without the need of any
external equipment or resistors!
Greater than 150% brake
torque is possible.
Details on New F7 Features & Functions
Note: This section details only a few of the new F7 features.
New Auto Tuning
The F7 has three different Auto-tuning functions to help to optimize the drive performance:
Leakage inductance is also auto-tuned, this improved torque linearity.
Feature GPD515/G5 F7
Primary Resistance Auto-tuning No Yes
Static Auto-tuning No Yes
Dynamic Auto-tuning Yes Yes
Primary Resistance Auto-tuning
F7 performs a non-rotational stator resistance measurement. This method applies to the V/Hz modes only.
Static Auto-tuning
This tuning method is for motors that prohibit uncoupling of the load. This method involves no motor shaft
rotation. This method applies to both the Open Loop Vector and Closed Loop Vector modes.
Dynamic Auto-tuning
This tuning method is for motors that are uncoupled from a load that allow motor shaft rotation. This method
applies to both the Open Loop Vector and Closed Loop Vector modes.
New High Slip Braking