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New bent axis motor features improved efficiency

New bent axis motor features improved efficiency

Sauer-Danfoss Inc. has released its new H1 60cm3 bent axis motor, the latest size in a series of motors designed to complement the growing range of H1 axial piston pumps. With the introduction of the H1 bent axis motors, the company offers a complete H1 transmission system, optimized around electrical control. The H1 motors not only provide OEMs with improvements in reliability and flexibility, but also provide higher overall efficiency, resulting in lower fuel consumption and reduced life cycle costs. Typical applications that will benefit from the new motor include rough terrain forklifts, combines, sprayers, road rollers, wheel loaders, and road building equipment.

Optimized for electrical control, the new motors are fully PLUS+1 compliant, enabling seamless integration with the company’s electronic machine control architecture. To withstand the harshest working environments, the electrical controls are designed with an IP67 and IP69K rating. The new bent axis motor is an evolution of proven technologies centered on a high displacement ratio of 32°, zero° capability, and higher overall efficiency.

An extensive simulation and testing program for the H1 bent axis motors has resulted in significant improvements in overall efficiency and an extremely low pressure drop within the fluid galleries of the motor. The H1 bent axis motors have a 6% efficiency gain at maximum displacement (high torque working cycle), compared to the nearest competitor, according to company sources. Combined with H1 pump efficiencies, this helps improve fuel economy and provides power savings for other vehicle functions, enhancing operating performance and increasing productivity.

A key feature of the new H1 motors is their zero° capability. It provides for seamless “on the go” shifting from 32° to zero°, such as in wheel assist applications, providing for a smooth transition with little or no torque interruptions or sudden speed changes. This enhanced control is not only more precise, but also improves the feel of the system during operation. The H1 motor will also shift seamlessly between two speed ranges, for example, work mode and travel mode, regardless of displacement settings.

Energy conservation and functional safety (Safety Integrity Level – SIL) is driving the demand for electronic engine management and vehicle control for off-road mobile machinery. As such, H1 bent axis motors have been designed around electrical controls, which allow a range of vehicle control concepts to be produced using the same motor hardware. With electronic control, the H1 system can be optimized to match the requirements of specific vehicle functions by adjusting the software parameters.

The H1 motors reportedly have the shortest length of any motor available on the market today, and at least one “clean side,” increasing vehicle design flexibility and facilitating installation. The higher speed capability of the motors also results in a high corner power and power density. This provides more power without increasing the size of the motors, which not only saves additional space, but also enables OEMs to design more compact system solutions.

For more information, contact Sauer-Danfoss Inc., 250 Parkway Dr., Lincolnshire, IL 60069. Phone: 847-876-1700.

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