In response to the expanding fuel cell market, Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. has newly developed an electric centrifugal air compressor (motor output: 45 kW) for Fuel Cell (FC) systems with a net output exceeding 200 kW, in addition to one (motor output: 30 kW) for FC systems with a net output of 150 kW. Available in two configurations, a two-stage (two-stage compressor) type and an expander (single-stage compressor + turbine) type, this product has improved efficiency and can meet diverse customer requirements. In the development of this product, new technologies have been introduced, such as a lightweight and highly rigid rotor with a hollow journal, oil-free air bearings, a high-efficiency compressor, and a high power density motor with an improved motor stator/rotor design. This report introduces these efforts.
