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Mitsubishi Electric to Launch SiC Module-Equipped CNC Drive Unit

Tokyo, October 29, 2012 - Mitsubishi Electric Corporation (TOKYO: 6503) announced today the launch of a drive unit equipped with a silicon carbide (SiC) power module for computerized numerical controllers (CNCs). The MDS-DM2-SPHV3-20080 is a multi-hybrid, multi-axis integrated-drive unit for drive control of spindle and servo motors. Sales will begin on December 3.

Power conversion modules are widely used in inverters and converters of household appliances and industrial equipment. SiC power modules are superior to conventional silicon (Si) modules in terms of their significantly reduced switching loss and high tolerance to temperature.

To date, Mitsubishi Electric has commercialized SiC power modules for inverters in air conditioners and railcars. The new SiC power module for CNC drive units offers higher speed and torque for driving machine tool spindles and servo motors, which is expected to improve manufacturing productivity in factories.

MDS-DM2-SPHV3-20080 multi-hybrid drive unit

MDS-DM2-SPHV3-20080 multi-hybrid drive unit

Main Features

SiC power module for higher speed and torque
- Power module uses diodes made with SiC
- High-speed switching operation increases spindle motor speed up to twice that of its previous model (MDS-DM Series) under specific conditions.
- Reduced power loss in drive unit results in 15% higher torque for spindle motors than MDS-DM Series under specific conditions.
Power shut-off and other functions enable downsizing and reduced wiring
- The Safe Torque Off function for shutting off the power supply to motors, which reduces the number of magnetic reactors required, is available as a standard feature.
- An interface for linear scale enables direct detection and feedback of machine positions, requiring no external interface unit.
Mitsubishi Electric's new CNC drive unit will be showcased at the 26th Japan International Machine Tool Fair (JIMTOF 2012), which will be held at Tokyo Big Sight in Japan from November 1-6.


Model name MDS-DM2-SPHV3-20080
Nominal maximum current for spindle (at peak)[A] 200
Nominal maximum current for servo (at peak) [A] 80 x 3 axes
Output Rated voltage [V] 155AC
Rated current for spindle [A] 63
Rated current for servo [A] 15.8
Input Rated voltage [V] 200 to 230AC
Tolerable voltage fluctuation: Between 10% and -15%
Rated current [A] 60
Control power Voltage [V] 24DC±10%
Compatible spindle motors SJ-V15-03ZT, SJ-V15-09ZT, SJ-V11-08ZT,
SJ-DJ15/80-01, SJ-DL3.7/240, SJ-BG090D/300
Compatible servo motors HF54, HF104, HF154, HF204, HF224, HF223,HF303, HF302
Weight [kg] 15
Dimensions [mm] W:260 x H:380 x D:278