Vacuum pumping system having a plurality of positive displacement vacuum pumps and method for operating the same

Variable speed drive with secondary windings

Device for pumping fluid

Adaptive connector position for high/low voltage inverter

Motor-driven compressor with switching element

Motor-driven compressor with switching element

Heat pump device, air conditioner, and freezer

System and method for protection of a compressor with an aluminum winding motor

Air-conditioning apparatus

Inverter-Integrated Electric Compressor

Inverter Integrated Electric Compressor

Inverter-integrated electric compressor

Control system for a compressor actuated by an electric motor, an assembly composed of an electric induction motor, an electronic control and an arrangement for motor-compressors, and a method of controlling an electric motor

Control system and method for protection against breakage of lubricanting-oil film in compressor bearings

Method of controlling motor drive speed