Description
The D-AL-7.5K is an AC reactor (line reactor) used in Mitsubishi Electric MDS-E / MDS-EX CNC drive systems.
It is not a drive or motor, but a protective input reactor installed in the power supply line of the CNC converter unit.
š§ What it is used for
The D-AL-7.5K is connected in series with the CNC converter unit (CV unit) to:
- Reduce input current harmonics
- Protect the power supply module
- Improve power factor
- Reduce electrical noise (EMI)
- Smooth incoming AC power
āļø Key Specifications (D-AL-7.5K)
| Specification | Value |
|---|---|
| Type | AC Reactor (Line Reactor) |
| Rated Capacity | 7.5 kW |
| Rated Current | ~27 A |
| Rated Voltage | 200ā240 V AC |
| Frequency | 50/60 Hz |
| Series Compatibility | MDS-E / MDS-EX CV units |
| Typical Use | CV-37 / CV-75 power supply units |
| Cooling | Natural air cooling |
| Installation | Inline with AC input |
š From Mitsubishi specification manuals, the D-AL-7.5K is paired with MDS-E-CV-37 and MDS-E-CV-75 power supply units.
š Compatible systems
Used with smaller CNC power supply units such as:
- MDS-E-CV-37
- MDS-E-CV-75
It is part of the input protection chain before the DC converter stage.
š Features
- Limits inrush current at power-on
- Reduces harmonics back into the power grid
- Improves stability of CNC drive system
- Protects CV (converter) unit from electrical stress
- Simple passive coil design (high reliability)
- Maintenance-free operation
š Typical applications
- CNC machining centers
- CNC turning machines
- Mitsubishi MELDAS CNC drive cabinets
- Servo + spindle drive systems (MDS-E series)