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Mitsubishi Uses SiC To Improve Factory Productivity

The silicon carbide power module for CNC drive units offers higher speed and torque for driving machine tool spindles and servo motors
Mitsubishi Electric Corporation has launched a drive unit equipped with a SiC power module for computerised 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 3rd 2012.



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

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

Until now, Mitsubishi Electric has commercialised 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.

The SiC power module offer high-speed switching operation and increased spindle motor speed up to twice that of its previous model (MDS-DM Series) under specific conditions. The SiC diodes also have a reduced power loss in drive unit results in 15 percent higher torque for spindle motors than the MDS-DM S series under specific conditions.

Power shut-off and other functions enable downsizing and reduced wiring.

What's more, the "Safe Torque Off" function for shutting off the power supply to motors reduces the number of magnetic reactors required, is available as a standard feature.

Also, an interface for linear scale enables direct detection and feedback of machine positions, meaning it requires 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 1st to 6th.



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