Chapter 4 Explanation of Functions
4 - 85
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
Data or range of data
Description
00
Disabling the auto-tuning
01
Enabling the auto-tuning (without
motor rotation)
Auto-tuning Setting
H001
02
Enabling the auto-tuning (with
motor rotation)
00
Hitachi general-purpose motor data
01
Automatically tuned data
Motor data selection
H002/H202
02
Automatically tuned data (online
auto-tuning enabled)
Motor capacity
H003/H203
0.2 to 75.0 (kW)
Motor poles setting
H004/H204
2, 4, 6, 8, or 10 (poles)
Auto constant R1
H030/H230
0.001 to 9.999/10.00 to 65.53 (
Ω
)
Auto constant R2
H031/H231
0.001 to 9.999/10.00 to 65.53 kgm
2
Auto constant L
H032/H232
0.01 to 99.99/100.0 to 655.3 (mH)
Auto constant Io
H033/H233
0.01 to 99.99/100.0 to 655.3 (A)
Auto constant J
H034/H234
0.001 to 9.999/10.00 to 99.99/100.0
to 999.9/1000. to 9999.(kgm
2
)
Base frequency
setting
A003/A203
30 to maximum frequency setting
(Hz)
00
Disabling DC braking
DC braking enable
A051
01
Enabling DC braking
AVR voltage select
A082
380, 400, 415, 440, 460, or 480
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.
H001: Auto-tuning Setting
H002/H202: Motor data selection, 1
st
/2
nd
motor
H003/H203: Motor capacity, 1
st
/2
nd
motor
H004/H204: Motor poles setting, 1
st
/2
nd
motor
H030/H230: Auto constant R1, 1
st
/2
nd
motor
H031/H231: Auto constant R2, 1
st
/2
nd
motor
H032/H232: Auto constant L, 1
st
/2
nd
motor
H033/H233: Auto constant Io, 1
st
/2
nd
motor
H034/H234: Auto constant J, 1
st
/2
nd
motor
A003/A203: Base frequency setting
A051: DC braking selection
A082: AVR voltage select
b046: Reverse run proctection enable
Related code
Содержание SJ700B SERIES
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