Hitachi SJ700B Series Instruction Manual page 144

4.2.92 Offline auto-tuning function
The offline auto-tuning function allows you to make the inverter
automatically measure and set the motor constants that are
required for the sensorless vector control, 0Hz-range sensorless
vector control, and vector control with sensor.
When using the inverter to perform the sensorless vector control,
0Hz-range sensorless vector control, and vector control with sensor
for a motor of which the motor constants are unknown, measure the
motor constants with the offline tuning function.
When "00" (Hitachi general-purpose motor data) is specified for the
motor constant selection (H002/H202), the motor constants of
Hitachi's general-purpose motors are set as defaults. When you drive a Hitachi's general-purpose motor
with the inverter, you can usually obtain the desired motor characteristics without problems. (If you cannot
obtain the desired characteristics, adjust the motor constant settings as described in Section 4.2.92 or
4.2.93.)
If you intend to use the online tuning function described later, be sure to perform offline auto-tuning
beforehand.
The offline auto-tuning function applies only to the 1st motor and 2nd motor controls. Do not apply this
function to the 3rd motor control.
The motor constant data corresponding to the date of one phase of γ connection at 50 Hz.
Item Function code
Auto-tuning Setting
Motor data selection
Motor capacity
Motor poles setting
Auto constant R1
Auto constant R2
Auto constant L
Auto constant Io
Auto constant J
Base frequency
setting
DC braking enable
AVR voltage select
When using this function, follow the instructions below.
1) Adjust the settings of base frequency (A003) and AVR voltage select (A082) to the motor specifications. When motor
voltage is other than the altanatives, set as "motor voltage (A082) " * "outputr voltage gain (A045) " = "motor rated
voltage"
2) This function can properly apply to only the motors in the maximum applicable capacity class of your inverter or one
class lower than the capacity class of your inverter. If this function is used for motors with other capacities, correct
constant data may not be obtained. (In such cases, the auto-tuning operation may not be completed. If the
auto-tuning operation is not completed, press the STOP/RESET key. The operation will end with an error code
displayed.)
3) If "01" (enabling) is specified for the DC braking enable (A051), motor constants cannot be measured by offline
auto-tuning. Specify "00" (disabling) for the DC braking enable. (The default setting is "00".)
4) If "02" (auto-tuning with motor rotation) is specified for the Auto-tuning Setting (H001), confirm or observe the
following:
a) No problem occurs when the motor rotates at a speed close to 80% of the base frequency.
b) The motor is not driven by any other external power source.
Data or range of data
H001
H002/H202
H003/H203
H004/H204 2, 4, 6, 8, or 10 (poles)
H030/H230 0.001 to 9.999/10.00 to 65.53 (Ω)
H031/H231
0.001 to 9.999/10.00 to 65.53 kgm
H032/H232 0.01 to 99.99/100.0 to 655.3 (mH)
H033/H233 0.01 to 99.99/100.0 to 655.3 (A)
0.001 to 9.999/10.00 to 99.99/100.0
H034/H234
to 999.9/1000. to 9999.(kgm
30 to maximum frequency setting
A003/A203
A051
A082 380, 400, 415, 440, 460, or 480
Chapter 4 Explanation of Functions
00
01
02
00
01
02
0.2 to 75.0 (kW)
2
2
)
(Hz)
00
01
4 - 85
Related code
H001: Auto-tuning Setting
H002/H202: Motor data selection, 1
H003/H203: Motor capacity, 1
H004/H204: Motor poles setting, 1
H030/H230: Auto constant R1, 1
H031/H231: Auto constant R2, 1
H032/H232: Auto constant L, 1
H033/H233: Auto constant Io, 1
H034/H234: Auto constant J, 1
A003/A203: Base frequency setting
A051: DC braking selection
A082: AVR voltage select
b046: Reverse run proctection enable
Description
Disabling the auto-tuning
Enabling the auto-tuning (without
motor rotation)
Enabling the auto-tuning (with
motor rotation)
Hitachi general-purpose motor data
Automatically tuned data
Automatically tuned data (online
auto-tuning enabled)
Disabling DC braking
Enabling DC braking
st nd
/2 motor
st nd
/2 motor
st nd
/2 motor
st nd
/2 motor
st nd
/2 motor
st nd
/2 motor
st nd
/2 motor
st nd
/2 motor