n TECHNOLOGY THE NORFOLK POWERTRAIN developer, Equipmake, has unveiled an ultralightweight electric motor which, it claims, is the most power-dense of its type in the world. The HPM-400 motor has been designed for high-performance space, aerospace and marine applications. The high-power, short-duration motor was original specified for use in a rocket fuel pump by the Australian company, Gilmour Space Technologies, but it incorporates several technological and packaging innovations designed to withstand extreme acceleration that are said to make it suitable for other high-performance applications. The motor has a top speed of 20,000rpm, a peak power/torque ratio of 400kW/250Nm, and a mass of just 30kg for the motor alone. Combined with its matching silicon carbide inverter, which weighs 10kg, the total weight of the complete system is just 40kg. “Because of its original intention for use as a rocket fuel pump, the HPM-400 features several novel innovations over conventional motor/inverters, making it ideal for use in high-performance space, aerospace and marine applications,” says Equipmake CEO, Ian Foley. “Firstly, the complete package is ultralightweight and capable of withstanding incredible acceleration,”he adds. “Secondly, when an inverter must operate in a vacuum, it needs to be high voltage, because lots of power is required. The motor maintains its internal air pressure and has been designed to withstand this pressure when it moves from the Earth’s atmosphere into the vacuum of space. This has resulted in compact cylindrical packages for both motor and inverter, with a carbon fibre shell to keep the pressure in and the weight down. “It all adds up to an advanced highpower, low-weight motor/inverter that’s at home in space, air or water,” says Foley. Equipmake, based in Snetterton, Norfolk, designs, tests and manufactures complete electric powertrains for a variety of applications. https://equipmake.co.uk UK-developed 400kW motor is ‘most power-dense of its type’ Equipmake has designed its HPM-400 motor (left) and SiC inverter (right) for highperformance applications in challenging environments
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