Secondary Resistance Compensation (Temperature Compensation) Function; Motor Constants Selection - Hitachi L700 SERIES Instruction Manual

4.2.93 Secondary resistance compensation (temperature compensation) function

The secondary resistance compensation function allows you to
compensate for the secondary resistance to control the motor speed
fluctuations due to the changes in the motor temperature. This function
can operate when the control mode is the sensorless vector control,
0Hz-range sensorless vector control, or vector control with sensor.
(Use the thermistor model PB-41E made by Shibaura Electronics Corporation.)
When using this function, specify "02" (NTC) for the thermistor for thermal protection control (b098). (With
a thermistor other than the PB-41E or another setting of the thermistor for thermal protection control, the
motor temperature cannot be detected correctly.)
Item
Temperature compensation
thermistor enable

4.2.94 Motor constants selection

Adjust the motor constant settings to the motor to be driven by the inverter.
When using a single inverter to drive multiple motors in the control mode based on VC, VP, or free V/f
characteristic, calculate the total capacity of the motors, and specify a value close to the total capacity for
the motor capacity selection (H003/H203).
When the automatic torque boost function is used, the motor constant settings that do not match the motor
may result in a reduced motor or unstable motor operation.
You can select the motor constants that are used when the control mode is the sensorless vector control,
0Hz-range sensorless vector control, or vector control with sensor from the following three types:
(1) Motor constants of Hitachi general-purpose motor
(2) Motor constants tuned by offline auto-tuning
(3) Arbitrarily set motor constants
The motor constants set for the 1st motor control apply to the 3rd motor control.
Item
V/F characteristic
curve selection
Motor data
selection
Motor capacity
Motor poles setting
Motor constant R1
Motor constant R2
Motor constant L
Motor constant Io
Motor constant J
Auto constant R1
Auto constant R2
Auto constant L
Auto constant Io
Auto constant J
*1 Any of "00" to "05" can be selected for the 1st motor (A044). Only "00" to "04" can be selected for the
2nd motor (A244). Only "00" or "01" can be selected for the 3rd motor (A344).
*2 If you copy the data from a J300 series inverter to your L700 series inverter, set constants R1, R2, and
Io as follows:
R1 = R1 /1.125
L700 J300
V: Voltage class (200 or 400 V)
Function code
P025
Function code Data or range of data
A044/A244/
A344
H002/H202
0.2 to 90.0 (kW)
H003/H203
<0.2 to 160(kW)>
H004/H204 2, 4, 6, 8, or 10 (poles)
H020/H220 0.000 to 65.53 ( )
H021/H221
0.000 to 65.53 ( )
H022/H222 0.00 to 655.3 (mH)
H023/H223 0.00 to 655.3 (A)
H024/H224
0.001 to 9999. (kgm
H030/H230 0.000 to 65.53 ( )
H031/H231 0.000 to 65.53 ( )
H032/H232 0.00 to 655.3 (mH)
H033/H233 0.00 to 655.3 (A)
H034/H234
0.001 to 9999. (kgm
R2 = R2 /1.2
L700 J300
Chapter 4 Explanation of Functions
Data
00 Disabling the secondary resistance compensation
01 Enabling the secondary resistance compensation
00 Constant torque characteristic (VC)
Reduced-torque characteristic (1.7th power
01
of VP)
02 (*1) Free V/f characteristic
03 (*1) Sensorless vector control (SLV)
04 (*1) 0 Hz-range sensorless vector control
05 (*1) Vector control with sensor (V2)
00 Hitachi general-purpose motor constants
01 Motor constants tuned by auto-tuning
02 Motor constants tuned by online auto-tuning
Note)<>applied for 90 to 160kW
(*2)
(*2)
(*2)
2
(*3)
)
2
)
Io = V/{272 x (2 x M
4 - 89
Related code
P025: Temperature
compensation thermistor enable
b098: Thermistor for thermal
protection control
Description
Description
-3
+ L ) x 10 }
J300 J300