The LCR filter smoothes inverter output current and voltage waveforms and reduces vibrations in the motor, noise from the motor, and radiated noise from the wires. The LCR filter suppresses a voltage surge that occurs at the motor terminals when driving a 400V class motor.
| Motor capacity (kW/HP) |
AC reactor L | Capacitor C | Resistor R |
|---|---|---|---|
| 0.2 | ACL-L2-0.4 | LPF2-H474 | — |
| 0.4 | ACL-L2-0.4 | LPF2-H474 | — |
| 0.75 | ACL-L2-0.75 | LPF2-H105 | — |
| 1.5 | ACL-L2-1.5 | LPF2-H105 | — |
| 2.2 | ACL-L2-2.2 | LPF2-H225 | — |
| 3.7 | ACL-L2-3.7 | LPF2-H225 | — |
| 5.5 | ACL-L2-5.5 | LPF2-H335 | — |
| 7.5 | ACL-L2-7.5 | LPF2-H475 | R-2-100 |
| 11 | ACL-L2-11 | LPF2-H685 | R-2-100 |
| 15 | ACL-L2-15 | LPF2-H825 | R-2-100 |
| 18.5 | ACL-L2-18.5 | LPF2-H156 | R-2-150 |
| 22 | ACL-L2-22 | LPF2-H156 | R-2-150 |
| 30 | ACL-L2-30 | LPF2-H186 | R-2-150 |
| Motor capacity (kW/HP) |
AC reactor L | Capacitor C | Resistor R |
|---|---|---|---|
| 0.4 | ACL-H2-0.4 | LPF2-H474 | — |
| 0.75 | ACL-H2-0.75 | LPF2-H474 | — |
| 1.5 | ACL-H2-1.5 | LPF2-H474 | — |
| 2.2 | ACL-H2-2.2 | LPF2-H474 | — |
| 3.7 | ACL-H2-3.7 | LPF2-H105 | — |
| 5.5 | ACL-H2-5.5 | LPF2-H105 | — |
| 7.5 | ACL-H2-7.5 | LPF2-H225 | — |
| 11 | ACL-H2-11 | LPF2-H225 | — |
| 15 | ACL-H2-15 | LPF2-H335 | R-2-100 |
| 18.5 | ACL-H2-18.5 | LPF2-H475 | R-2-150 |
| 22 | ACL-H2-22 | LPF2-H475 | R-2-150 |
| 33 | ACL-H2-33 | LPF2-H475 | R-2-150 |
| 37 | ACL-H2-37 | LPF2-H685 | R-2-220 |
| 45 | ACL-H2-45 | LPF2-H685 | R-2-220 |
| 55 | ACL-H2-55 | LPF2-H825 | R-2-270 |
In the model of 75kW or more, the number of connected steps of R-C circuits (resistor-Condenser combination circuit) is different depending on the career frequency of the inverter.
Raising the career frequency of the inverter can decrease the number of steps. The capacity of ACL is selected, and the number of steps of filter. R-C circuits is selected according to the career frequency of the inverter. The resistance of the filter will be overheated and likely disconnected when putting to practical with a number of steps is less than following numbers.
| Inverter capacity(kW) | Maximum carrier frequency | Condition | |||
|---|---|---|---|---|---|
| SJ700 | L700 | ACL | C | R | |
| 75 | 6 | 6 | ACL-H2-75 | LPF2-H206 | R-2-270 |
| 90 | 4 | 6 | ACL-H2-90 | ||
| 110 | 6 | 3 | ACL-H2-110 | ||
| 132 | 3 | 4 | ACL-H2-132 | ||
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