ThinGap Corporation ANNOUNCES:
MOTOR FOR OXYGEN CONCENTRATOR COMPRESSORS

Contact: Bob Thomas 818.761.8405

VENTURA, CALIFORNIA – April 19, 2006 - ThinGap Corporation, the leader in high power density DC motors, today announced the TG2300 Series of motors designed for use with oxygen concentrator compressors. The high efficiency TG2300 motor series allows longer battery life and higher inertia for smooth and quiet operation, while reducing weight.

“ThinGap’s technology is well-suited to deliver the high efficiency needed for long battery life, even at lower speeds, and although lower speeds lead to vibration caused by compressor torque pulsation, it is smoothed by the high inertia of the TG2300,” said Rean Pretorius, president & CEO, ThinGap Corporation. “ThinGap technology is gaining acceptance as a preferred technology for portable oxygen concentrators as cost reductions have become a catalyst for accelerating their use and patients find them lighter and much easier to transport than oxygen bottles.”

An oxygen concentrator using the TG2300 Series motor can be powered by a 24V battery, car accessory socket or standard 110 VAC electrical outlets. Because ThinGap technology provides higher inertia, it minimizes the losses caused by torque pulsation. As a result, the motor provides higher efficiency, increasing the battery operation time limits on patient mobility.

With the use of the TG2300, OEM customers can reduce the weight and size of their oxygen concentrator, while increasing reliability and cutting costs by eliminating parts such as couplings and bearings. Additionally, the TG2300’s stator does not contain iron which eliminates magnetic attraction of parts and facilitates assembly.

Typically, the optimum speed for compressors is between 1,000 and 3,000 RPM, which because of losses reduces the time the oxygen concentrator can operate under battery power. The challenges that were overcome include the extra losses caused by current pulsation due to low inertia. With a conventional BLDC motor, the pressure loading of the compressor causes a torque pulse once every complete cycle with a single stage compressor and twice every cycle with a two-stage compressor.

The ThinGap technology eliminates magnet wire and iron laminations in the stator and has a rotor containing the entire magnetic circuit. This eliminates hysteresis power loss. In combination with high-energy neodymium-iron-boron magnets, the thin air gap creates a high power density motor, with excellent characteristics for battery-powered applications. The TG 2300 stator does not contain iron, which eliminates magnetic attraction of parts and facilitates assembly.

About ThinGap
ThinGap Corporation manufactures an innovative line of brush and brushless motors utilizing a patented electromotive coil design, which produces a high copper-packing density and higher copper-to-total-volume ratio than motors with conventional wire windings. A precision thin copper sheet replaces the iron core and wire windings of conventional motors. This provides higher power-to-weight ratios, a wider range of speed and torque capability, improved heat dissipation and lower electrical resistance. Applications include:

• Piston and rotary/vane compressors for portable oxygen concentrators and fuel cells
• Industrial cordless tools, such as strapping machines, concrete coring and drilling machines, impact wrenches, ratchet drivers and grinders
• Precision High speed, constant velocity scanners
• Unmanned vehicles, such as aerial, ground and underwater
• Air bearing spindles for servowriters, disk drive testing, optics and imaging, precision wafer inspection, metrology and precision balancing
• Wind power generators (alternative energy)

For more information, please visit http://www.ThinGap.com.