Inverters drive fluid power energy saving: the lowering cost of power electronics makes AC inverters and fixed output pumps both a novel and economically viable way of delivering variable flow

Article Abstract:

Variable speed AC drives can be used to vary the rotation speed of internal gear pumps, allowing economically delivered hydraulic oil flow over a broad speed range. Initially they will be applied to platic injection moulding machines where oil demand fluctuates, according to whether there are moving or stationary rams.

Variable speed drives

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Friction drive steps to smaller sizes

Article Abstract:

A description is presented of the design and construction of a long-life micro motor which can be used in a range of consumer applications. The motor is able to provide force and high torque without the need for a gearbox.

Manufacturing industry, Manufacturing industries, Cover Story, Nanotechnology, Motors

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Compliant drive has a spring in its step

Article Abstract:

Issues concerning the invention of a new kind of mechanical drive are presented. John Hammerbeck's design involves a drive that is compliant to changes in dimensions, soft starting and is variable in ratio.

Mechanical movements, Movements (Mechanisms), Hammerbeck, John

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