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DC Electric Motors For Tough Conditions
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Date Added: 4th May 2012
Maxon Motor have always had the best reputation for their power drive products and working with customers to develop new products. Maxon's long experience of special drive solutions in tough conditions is legendary in such projects as jet fighters and NASA Mars rovers (one of which is still operating after 7 years in glorious isolation on Mars).
Maxon have now developed the 240 watt EC22 HD (Heavy Duty) brushless DC motor in collaboration with UK's oil exploration industry for down-the-hole operation. These are the toughest conditions that can be found on the Planet at depths of 5,000m, up to 1,700bar (25,000psi) pressure, extreme temperatures of between -80deg C to 240deg C and the EC22 HD has been proven to withstand violent vibrations of 25grms and impact loads of 100g for extended periods.
Operational Options
The EC22 HD can be operated either in air or in oil. The basic design is the same but the oil cooling allows the trebling of the drive unit's capacity from 80watt rating to 240watt.
These types of dc electric motors can be supplied with high temperature Hall-effect sensors as an option. This allows running with sensors or running in sensorless mode with electrical motor controllers.
EC 22 Ø22 mm, brushless, 240 Watt Motor
This motor is rated specifically for total submersion in oil under extreme temperature and pressure (up to 1,700bar) applications such as oil, gas and geothermal wells:
Lead dimensions: 22 mm OD
Stator body length 75mm (or 89.5mm Hall-effect sensors)
Shaft Diameter 6mm
Voltage: 48V DC nominal
Test Specification: shock-loaded and vibration applications (according to
MIL-STD810F/Jan2000 Fig. 514.5C-10)
No-load speed: 12,900rpm @ 25deg C and 13,900rpm @ 200deg C
Max Continuous Torque: 149mNm @ 25deg C and 57.2mNm @ 200deg C
Weight: 230g (sensorless)
Mean Efficiency 70%
EC 22 Ø22 mm, brushless, 80 Watt Motor
These dc electric motors are rated specifically for heavy duty operation in air and suitable for many applications including:
- Extreme temperature applications, ultra-high vacuum applications (low outgassing),
- Gas turbine starter/generators for aircraft engines, regulation of combustion engines
- Oil, gas and geothermal wells
- Robotic exploration vehicles
- Pumps and valves for liquid metal cooling
Lead dimensions: 22 mm OD
Stator body length 75mm (or 89.5mm Hall-effect sensors)
Shaft Diameter 6mm
Voltage: 48V DC nominal
Test Specification: shock-loaded and vibration applications (according to
MIL-STD810F/Jan2000 Fig. 514.5C-10)
No-load speed: 13,00rpm @ 25deg C and 14,100rpm @ 200deg C
Max Continuous Torque: 56.8mNm @ 25deg C and 15.0mNm @ 200deg C
Weight: 230g (sensorless)
Mean Efficiency 88% @ 25deg C and 85% @ 200deg C
Maxon Motors produce a range of DC electric motors including both brushed DC motors and brushless options, as well as motor controllers and related devices for a variety of applications. See their main profile page for more product information.
More from this supplier | More from this category: Motors, controls and Drives
More from this subcategory: DC Motors