GE AF-650 GP Programming Manual page 71

Parameter Descriptions
H-43 Torque Characteristics
Option:
3 3
H-44 Constant or Variable Torque OL
Option:
[0] High
*
torque
[1] Normal
torque
H-45 Local Mode Configuration
Option:
[0] Speed
open loop
[1] Speed
Closed
Loop
[2] As mode
*
par H-40
70
Function:
mode, due to the high DC-link voltage available
in generator mode.
P W = ω rad/s × T Nm
shaft mech
This relationship with the constant power is
illustrated in Illustration 3.25:
Illustration 3.25 Constant Power
Function:
NOTICE
This parameter cannot be adjusted
while the motor is running.
Use this parameter to configure the frequency
converter for either high or normal overload.
When selecting the frequency converter size,
always review the technical data in the
operating instructions or the design guide to
know the available output current.
Allows up to 160% over torque.
For oversized motor - allows up to 110% over
torque.
Function:
Select which application configuration mode
(parameter H-40 Configuration Mode), that is
application control principle, to use when a
local (keypad) reference is active. A local
reference can be active only when
parameter F-02 Operation Method is set to [0]
Linked to Hand/Auto or [2] Local. By default the
local reference is active in local mode only.
H-46 Back EMF at 1000 RPM
Range:
500 [0 -
V 9000 V]
*
H-47 Motor Angle Offset
Range:
0 [-32768
*
- 32767]
H-48 Clockwise Direction
Option:
[0] Normal The motor shaft turns in clockwise direction when
*
02/2016 All rights reserved.
Function:
Set the nominal back EMF for the motor when
running at 1000 RPM.
Back EMF is the voltage generated by a PM
motor when no frequency converter is
connected and the shaft is turned externally.
Back EMF is normally specified for nominal
motor speed or for 1000 RPM measured
between 2 lines. If the value is not available for
a motor speed of 1000 RPM, calculate the
correct value as follows. If back EMF is for
example 320 V at 1800 RPM, it can be
calculated at 1000 RPM:
Example
Back EMF 320 V at 1800 RPM. Back
EMF=(Voltage/
RPM)*1000=(320/1800)*1000=178.
This parameter is only active when
parameter P-20 Motor Construction is set to
options that enable PM (permanent magnet)
motors.
NOTICE
When using PM motors, it is
recommended to use brake resistors.
Function:
Enter the correct offset angle between the PM
motor and the index position (single-turn) of the
attached encoder or resolver. The value range of
0–32768 corresponds to 0–2 x pi (radians). To
obtain the offset angle value: After frequency
converter start-up, apply DC hold and enter the
value of parameter DR-20 Motor Angle into this
parameter.
This parameter is only active when
parameter P-20 Motor Construction is set to [1] PM,
non-salient SPM (Permanent Magnet Motor).
Function:
NOTICE
This parameter cannot be adjusted while
the motor is running.
This parameter defines the term clockwise
corresponding to the keypad direction arrow. Used
for easy change of direction of shaft rotation
without swapping motor wires.
the frequency converter is connected U⇒U, V⇒V,
and W⇒W to the motor.
DET-618D