The objective of this technical article is to provide certain criteria and time intervals for conducting insulation tests on electric motors, generators and other electrical equipment. Testing is done to ensure that the equipment is intact and to provide a... Read more

The post Insulation tests on electric motors and generators: DC High Potential Testing (HiPot) appeared first on EEP - Electrical Engineering Portal.

Startup H3X, with a facility in Louisville, has ambitions to become the world's leading supplier of advanced electric motors.

A multistage turbomachine is disclosed, comprising a casing with a fluid inlet and a fluid outlet and a plurality of stages arranged in the casing. A flow path extends from the fluid inlet to the fluid outlet through the sequentially arranged stages. Each stage is comprised of a rotating impeller and an electric motor embedded in the casing and arranged for rotating the impeller at a controlled rotary speed. Each electric motor comprises a motor rotor, arranged on the impeller and integrally rotating therewith, and a motor stator stationarily arranged in the casing. Pairs of sequentially arranged impellers are configured for rotation in opposite directions.

A rotor core for an electric motor includes a stack of laminations having peripherally spaced openings receiving copper bars with opposite end portions projecting from the stack. The core is mounted on an arbor and is inserted into a mold on a vertical die cast press having a shot chamber. The mold has upper and lower mold members defining annular cavities receiving end portions of the bars. Molten copper or aluminum is poured into the shot chamber and forced upwardly by a shot piston through passages in the lower mold member and into the cavity around the lower end portions of the bars. The pressurized molten metal solidifies and shrinks around the bar end portions to form an endring for the rotor. The core, endring and arbor are inverted and confined in the mold, and the casting steps are repeated to form the opposite endring.

Exports of Generation of Current, Electric Motors in Switzerland increased to 231.15 CHF Million in March from 231.04 CHF Million in February of 2020. Exports of Generation of Current, Electric Motors in Switzerland averaged 175.71 CHF Million from 1988 until 2020, reaching an all time high of 326.92 CHF Million in October of 2008 and a record low of 55 CHF Million in January of 1988. This page includes a chart with historical data for Switzerland Exports of Generation of Current, Electric Motors.

Imports of Electric Motors & Generators in Japan increased to 18365.33 JPY Million in March from 13490.79 JPY Million in February of 2020. Imports of Electric Motors & Generators in Japan averaged 12137.46 JPY Million from 1988 until 2020, reaching an all time high of 29021.96 JPY Million in June of 2011 and a record low of 2285.71 JPY Million in April of 1988. This page includes a chart with historical data for Japan Imports of Electric Motors & Generators.

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