SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
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Chapter 4 Explanation of Functions<br />
4.2.95 Motor constants selection<br />
Adjust the motor constant settings to the motor to be driven by the inverter.<br />
When using a single inverter to drive multiple motors in the control mode based on VC, VP, or free V/f<br />
characteristic, calculate the total capacity of the motors, and specify a value close to the total capacity for<br />
the motor capacity selection (H003/H203).<br />
When the automatic torque boost function is used, the motor constant settings that do not match the motor<br />
may result in a reduced motor or unstable motor operation.<br />
You can select the motor constants that are used when the control mode is the sensorless vector control,<br />
0Hz-range sensorless vector control, or vector control with sensor from the following three types:<br />
(1) Motor constants of <strong>Hitachi</strong> general-purpose motor<br />
(2) Motor constants tuned by offline auto-tuning<br />
(3) Arbitrarily set motor constants<br />
The motor constants set for the 1st motor control apply to the 3rd motor control.<br />
Item Function code Data or range of data Description<br />
00 Constant torque characteristic (VC)<br />
V/F characteristic<br />
curve selection<br />
Motor data<br />
selection<br />
Motor capacity<br />
A044/A244/<br />
A344<br />
H002/H202<br />
H003/H203<br />
01<br />
Reduced-torque characteristic (1.7th power<br />
of VP)<br />
02 (*1) Free V/f characteristic<br />
03 (*1) Sensorless vector control (SLV)<br />
04 (*1) 0 Hz-range sensorless vector control<br />
05 (*1) Vector control with sensor (V2)<br />
00 <strong>Hitachi</strong> general-purpose motor constants<br />
01 Motor constants tuned by auto-tuning<br />
02 Motor constants tuned by online auto-tuning<br />
0.2 to 75.0 (kW)<br />
<br />
Note)applied for 75 to 150kW<br />
Motor poles setting H004/H204 2, 4, 6, 8, or 10 (poles)<br />
Motor constant R1 H020/H220 0.000 to 65.53 (Ω) (*2)<br />
Motor constant R2 H021/H221 0.000 to 65.53 (kgm 2 ) (*2)<br />
Motor constant L H022/H222 0.00 to 655.3 (mH)<br />
Motor constant Io H023/H223 0.00 to 655.3 (A) (*2)<br />
Motor constant J H024/H224 0.001 to 9999. (kgm 2 ) (*3)<br />
Auto constant R1 H030/H230 0.000 to 65.53 (Ω)<br />
Auto constant R2 H031/H231 0.000 to 65.53 (Ω)<br />
Auto constant L H032/H232 0.00 to 655.3 (mH)<br />
Auto constant Io H033/H233 0.00 to 655.3 (A)<br />
Auto constant J H034/H234 0.001 to 9999. (kgm 2 )<br />
*1 Any of "00" to "05" can be selected for the 1st motor (A044). Only "00" to "04" can be selected for the<br />
2nd motor (A244). Only "00" or "01" can be selected for the 3rd motor (A344).<br />
*2 If you copy the data from a J300 series inverter to your <strong>SJ700</strong> series inverter, set constants R1, R2,<br />
and Io as follows:<br />
R1 <strong>SJ700</strong> = R1 J300 /1.125 R2 <strong>SJ700</strong> = R2 J300 /1.2 Io = V/{272 x (2 x M J300 + L J300 ) x 10 -3 }<br />
V: Voltage class (200 or 400 V)<br />
*3 Convert the moment of inertia (J) into the motor shaft data. When the value of J is large, the motor<br />
response is fast, and the motor torque increases quickly. When the value of J is small, the motor<br />
response is slow, and the motor torque increases slowly. To control the response, set the value of J,<br />
and then adjust the speed response (H005/H205).<br />
*4 In the modes of sensorless vector control, 0Hz-range sensorless vector control and vector control with<br />
sensor, inverter may output reverse to given operation command in the low speed range as a nature of<br />
those control. In case there is a specific inconvenience for example reverse rotation damage the<br />
machine, enable the reverse run protection (b046). (see 4.2.101: Reverse run protection function)<br />
Arbitrary setting of motor constants<br />
For the arbitrary setting of the motor constants, the function codes requiring settings vary depending on<br />
the settings of the 1st/2nd control function and the motor constant selection.<br />
- When the 1st/2nd control function is enabled and "00" is specified for the motor constant selection →<br />
Directly input the desired values for "H020" to "H024".<br />
- When the 1st/2nd control function is enabled and "01" or "02" is specified for the motor constant<br />
selection → Directly input the desired values for "H030" to "H034".<br />
When the offline auto-tuning has not been performed, the constants (<strong>Hitachi</strong> general-purpose motor<br />
constants) of the motors in the same capacity class as the inverter have been set for "H030/H230" to<br />
"H034/H234".<br />
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