High temperature, Heavy duty DC motor solution for down hole and Industrial applications.
maxon motor launches the EC 22 HD brushless DC motor. The EC 22 HD was developed to meet the high demands in the deep drilling technology field. The technology permits exploration of oil and gas resources from depths beyond 2'500 metres (8'200 feet). In conjunction with directional drilling (the dynamic orientation of a borehole) it allows exploration of deposits in drilling depths of currently about 5'000 metres (16'500 feet) and bore lengths of up to 11'000 metres (36'000 feet). Temperatures and pressure conditions present in this depth range, in conjunction with high vibration emitted by the drilling process, make the employment of electronic components a real challenge. Today, electronics and respective drives permit more sophisticated monitoring and control of a multitude on functions within the drilling process. For instance, the drilling head’s position and orientation can be dynamically measured and adjusted. In a number of deep drilling tools, hydraulic valves and flaps are being operated by electro-mechanic drives.
The brushless DC motor is designed to withstand harsh environments, such as extreme temperatures, high shock loads and vibrations, as well as high ambient pressure or vacuum. Even submerged operation in oil is possible. Faultless operation has been demonstrated in an extended ambient temperature range of -55°C up to 200°C – all internal components are designed to withstand temperatures of at least 240°C. External shock loads and vibrations can be absorbed over the entire temperature range without damaging the motor. The motor is available both with and without Hall sensors. If required, Hall sensors come as a package added to the back of the motor in a similar style to that of an encoder. The motor parts are designed to be immersed in oil at up to 1500 bar and at least 200°C ambient temperature. During operation the internal components will heat up, thus the performance of the motor will depend on the ability of internal components to withstand this heating. Initial tests with brushless motors immersed in oil suggests the oil improves the heat conduction and thus improves the motor performance. External shocks of up to 15G can be absorbed without damage to the motor. There are special magnet designs with no adhesives. • Front bearing retained axially by flange in one direction & C-clip in other direction. • Special designed bearings and bearing mounts with additional securing for vibration resistance • Winding with high temperature (>240°C) wire • Teflon wiring for external motor connections • High temperature rated PCB (>240C) • SmCo magnet material (~300°C rating) • Welded housing/flange connections.
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| EC motor Ø22 mm, brushless motor, 80 Watt. |
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Author: mmau edit 30.08.2010 mmag/20.08.2010
