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Mitsubishi Electric to roll SiC module-equipped CNC drive unit

Posted: 01 Nov 2012 ?? ?Print Version ?Bookmark and Share

Keywords:computerized numerical controller? CNC? silicon carbide? drive unit?

Mitsubishi Electric Corp. has unleashed a drive unit equipped with a silicon carbide (SiC) power module for computerized numerical controllers (CNCs). The company revealed that the MDS-DM2-SPHV3-20080 is a multi-hybrid, multi-axis integrated-drive unit for drive control of spindle and servo motors.

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.

The SiC power module allows for higher speed and torque, and touts high-speed switching operation that increases spindle motor speed up to twice that of its previous model (MDS-DM Series) under specific conditions. In addition, it boasts reduced power loss in drive unit results in 15% higher torque for spindle motors than MDS-DM Series under specific conditions.

The MDS-DM2-SPHV3-20080 flaunts power shut-off and other functions that enable downsizing and reduced wiring. It features safe torque off function for shutting off the power supply to motors, which reduces the number of magnetic reactors required. Likewise, it has an interface for linear scale that enables direct detection and feedback of machine positions, requiring no external interface unit, added the company.

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