Material testing systems having three phase switched-mode power supply units

Abstract

Disclosed example material testing systems include: a material testing apparatus configured to receive an electrical supply, wherein the material testing apparatus comprises: guide means; sample holding means configured for holding a sample; force means configured for applying force to the sample; and a crosshead arranged to support at least a portion of one or both of the sample holding means and the force means, wherein the crosshead is moveable about the guide means; a three phase switched-mode power supply unit arranged to provide the electrical supply to the material testing apparatus; and one or more blocking means connected with a power output of the three phase switched-mode power supply unit, wherein the blocking means is arranged to prevent an electrical current at the power output of the three phase switched-mode power supply unit from flowing in a predetermined direction.

Dependencies are inferred from the claim text.