Abstract: A multiphase transformer rectifier unit for converting a three-phase alternating current supplied from a power distribution system to direct current supplied to at least one load. The multiphase transformer rectifier unit includes a magnetic core having a primary winding set and secondary winding set, and a rectifier circuit. The secondary winding set is arranged to generate N substantially equally distributed output phases, wherein N is an odd number multiple of 3, and N>3, and the primary winding set (17) is arranged to provide a positive or negative phase shift equal substantially to 360 ( 8 × N ) degrees of said output phases. Also an arrangement of two inventive multiphase transformer rectifier units for reducing current distortion in the power distribution system.

Abstract: A multiphase transformer rectifier unit for converting a three-phase alternating current supplied from a power distribution system to direct current supplied to at least one load. The multiphase transformer rectifier unit includes a magnetic core having a primary winding set and secondary winding set, and a rectifier circuit. The secondary winding set is arranged to generate N substantially equally distributed output phases, wherein N is an odd number multiple of 3, and N>3, and the primary winding set (17) is arranged to provide a positive or negative phase shift equal substantially to 360 ( 8 × N ) degrees of said output phases. Also an arrangement of two inventive multiphase transformer rectifier units for reducing current distortion in the power distribution system.

Abstract: A touch-sensitive device accepts single-touch and multi-touch input representing gestures, and is able to changing a parameter of a gesture responsive to introduction or removal of a point of contact while the gesture is in progress. The operation associated with the gesture, such as a manipulation of an on-screen object, changes in a predictable manner if the user introduces or removes a contact point while the gesture is in progress. The overall nature of the operation being performed does not change, but a parameter of the operation can change. In various embodiments, each time a contact point is added or removed, the system and method of the present invention resets the relationship between the contact point locations and the operation being performed, in such a manner as to avoid or minimize discontinuities in the operation. In this manner, the invention avoids sudden or unpredictable changes to an object being manipulated.