HV HS — high-voltage high-speed synchronous motor with solid rotor up to 105 MW, up to 6700 rpm

Description

HV HS is a high-voltage high-speed synchronous motor of the Special Motors series for demanding applications: compressors, underground gas storage, LNG plants and generators. The motor is equipped with a solid cylindrical turbo rotor and, in terms of power and availability, sets the benchmark in its class; the manufacturer reports the largest installed base for similar applications. The series was previously produced under another brand (H-modyn).

The power and rotational speed range runs from 15 MW at 6700 rpm to 105 MW at 3000 rpm (and above). The typical design is two-pole; a four-pole design is used at double grid frequency. The rated voltage is 10–13.8 kV for frequency start and direct operation from the grid, and 3.3–13.8 kV for operation from a frequency converter. The design is modular: a torsionally rigid foundation frame, a removable stator block and a modular steel casing; the rotor is mounted on pedestal-type sleeve bearings, and the excitation comes from an external brushless exciter. The standard cooling method is IC81W (air-to-water heat exchanger), also IC86W and IC01; the degree of protection is IP23–IP55. Explosion-protected versions are Ex pxb for zone 1, Ex ec or Ex pzc for zone 2, and Class I Division 2. The robust design provides high reliability and long service life even at high speeds in the megawatt range, high loading and efficiency, low operating costs, high mechanical stability, low noise and optimized vibration behaviour. The motor works together with medium-voltage frequency converters of the manufacturer (for example GL150 or Perfect Harmony GH150) and makes it possible to replace steam and gas turbines in compressor drives with an electric drive. Applications are direct (gearless) drive of turbocompressors on main gas pipelines, compressor stations of underground gas storage, gas liquefaction, air separation units, and generator operation.

Technical specifications