Description
MDS-EJH-V1-20 is a Mitsubishi Electric CNC servo drive unit from the MDS-EJH (all-in-one drive) series, used in MELDAS CNC machine systems.
Description
- Manufacturer: Mitsubishi Electric
- Series: MDS-EJH / EJH series
- Model: MDS-EJH-V1-20
- Type: 1-axis servo amplifier (integrated servo drive with built-in power stage)
- Application: CNC lathes, machining centers, milling machines, industrial automation
Main Function
This unit is a servo axis drive, meaning it controls one motor axis. It:
- Receives motion commands from the CNC controller
- Drives a servo motor with precise position, speed, and torque control
- Uses encoder feedback for closed-loop accuracy
- Includes integrated power electronics (no separate CV converter required in EJH architecture)
Key Specifications
- Rated current: 20 A class
- Input supply: 380–480 VAC, 3-phase (400V class CNC systems)
- Control method: PWM servo control with regenerative/dynamic braking support
- Cooling: Cabinet air cooling / forced ventilation
- Protection: IP20 industrial cabinet type
Role in CNC system
CNC controller → MDS-EJH-V1-20 → Servo motor → Machine axis movement
Important clarification
- Not a CV unit (those are power supply converters like MDS-EH-CV series)
- Not a DH-AL reactor (those are AC input filters)
- It is a servo drive (axis amplifier) that directly controls motion
Simple system view
- CV (EH/DH CV) → DC power supply
- DH-AL → AC input reactor (power conditioning)
- EJH-V1-20 → Servo drive (controls one CNC axis)