Appendix I Manual For New Functions - Hitachi J300 Series Instruction Manual

Appendix I Manual for New Functions
l.
Autotuning
[Outline of the function]
This is a function for automatically setting the motor circuit constant necessary for the
sensorless vector.
When the autotuning function is performed by a motor which is designed according to JIS C
4210 and then the sensorless vector is contolled, even a motor (Hitachi general purpose motor)
whose constant is unknown at an output frequency of I Hz can generate a torque of 1507o.
An Hitachi general purpose motor is given a constant which is a default value. Therefore, in
every case, the characteristics will be obtained without trouble. When the characteristics
cannot be obtained, measure the motor circuit constant by the autotunins function.
(2) DC excnation (Tle mo1or d@s not rotate.)
(l) The noror is accelenred "p ro 80% of the
base liequency and then decelerated and
sropped. (The molor rotares-)
(4) The noto. is accelerated up lo 40% of the base
frequency dd rhen decelerated and sloppcd.
I
(The motor rotrles.)
, (41) Measurcncnt(accele.arioddeceleration)
5 0 s e c o n d s - - - a - 4 0
|
50 r< I0o seconds - - - a = 20
:
l0O t< Soosc.onds
a - 10
Autorunirg suning ncthcl
(l) Before executing the autotuning function,
make sure the following set values.
O a) Base frequency
b) Motor capacity
c) No. of motor poles
Set the values according to a motor
which uses a, b, and c.
@ Make sure that 0 Hz is not set. (When 0
Hz is set, the autotuning function will
not be performed.)
@ Cancel all the DC braking settings.
(DC braking is not set by initialization.)
@ Make an molor inpul vollage setting
(F-03 AVR AC -)
according to the
motormting.
(2) D ve the motor for about 60 to 120 sec-
onds. (During autotuning, the motor auto-
matically runs in the order of (1) to (4)
gi\en on lhe lefr and $e molorconslant is
measured. Therefore, make sure before
starting operation that no problems are
caused to the load to be connected during
the automatic running frorr (1) to (4).)
Example:
When the base frequency is 120 Hz, the
motor runs up to 8070 of the base frequency
in (3), that is, 96 Hz and then decelerates
and stops.
The status for using the autotuning data is
set.
Running under sensorless vector control rs
available.
Tum lhe aulotuning mdle
ON. (Note)
Tlm tbe Run command ON.
AtterDe measurement
cnds, rhe motor is stopped-
Selecl $e confol ncthod. Selecr rhe motordara.
A-1