{"id":11448,"date":"2017-05-29T20:46:17","date_gmt":"2017-05-30T03:46:17","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=11448"},"modified":"2017-05-29T20:51:29","modified_gmt":"2017-05-30T03:51:29","slug":"another-combined-motor-controller-system","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/another-combined-motor-controller-system\/","title":{"rendered":"Another Combined Motor-Controller System"},"content":{"rendered":"

Compact Dynamics<\/a>, a German electronics firm associated with MAHEPA, the green aviation consortium, has developed two types of electric motor-controller combinations adaptable to aeronautical use.\u00a0 Their Dynax\u00ae Transversal flow machines and Dynadyn\u00ae Radial flux drives integrate power electronics with the motor.<\/p>\n

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Dynax MGi25-48 combines motor and controller in one compact unit<\/p><\/div>\n

Their Dynax MGi25-48, one of two lower-power motor-controller combination, is rated at 25 kilowatts (33.5 horsepower) maximum power at 58 Volts, and 20 kW continuous output.\u00a0 The small motor can generate an impressive 75 Newton-meters (58.3 foot pounds) of torque from its 14 kilogram (30.8 pound) heft.\u00a0 Even with its controller mounted atop, the full motor package is only 318 millimeters (12.5 inches) high, and 233 mm (9.17 inches) deep.\u00a0 The motor itself is only 107 mm (4.2 inches) thick.\u00a0 Its 10,000 rpm top speed obviously requires a propeller speed reduction unit for best efficiency.<\/p>\n

A higher-voltage model, the MG40-400, apparently under development, will operate on 300 to 415 Volts, and put out 40 kW (53.6 hp.) from 350 Volts.\u00a0 The motor weights 10.2 kg (22.44 pounds), but the controller adds 5.6 kg (12.32 pounds).<\/p>\n

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MG-40-400’s compact dimensions<\/p><\/div>\n

Compact Dynamics\u2019 Dynadyn radial-flux motors are more powerful, and a bit thicker than their lower-power cousins, but still compact and light weight, each weighing 13 kilogram (28.6 pounds) with integrated controllers.\u00a0 The Dynadyn 75 has a maximum 75 kW (100.5 hp.) and 25 kW (33.5 hp.) continuous output: the Dynadyn 85 achieves 86 kW maximum and 55 kW (73.7 hp.) continuous power.\u00a0 They generate 69 and 79 nM (50.9 ft-lbs. and 58.3 ft.-lbs.) of torque, respectively.\u00a0 They weight 5.8 and 6.6 kg (12.76 and 14.52 pounds), respectively.<\/p>\n

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Dynadyn 75 motor-controller provides high torque, high efficiency<\/p><\/div>\n

All motors are liquid cooled and are \u201cCharacterized by a very low moment of inertia and high dynamics. With the high power density and low weight there are different options for use of the Dynadyn\u00ae-drives in\u00a0motorsports or aviation.\u201d\u00a0 All use CAN protocol and can be adapted for various applications with a number of options.\u00a0 Prices will probably reflect those for those for the 500e drive system for Formula Student teams, 9,000 euros for a 42 kW (56.3 hp.) motor-controller combination.<\/p>\n

Certainly, the motors have characteristics that can be adapted to aircraft use, and the company claims that it will produce configurations that suit client\u2019s individual requirements.\u00a0 These are similar to the Qinetix motor<\/a> outlined here a few weeks\u00a0ago.\u00a0 It\u2019s nice seeing competitive forces rising in the electric aerospace market.<\/p>\n