Sauer-Danfoss EMD Speed Sensor Provides Dual Functionality and High Resolution

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Sauer-Danfoss has enhanced its mobile machine control with a new precision EMD speed sensor for orbital motors. Employing a new magnetic measuring principle delivers improved motor controllability and system flexibility. The sensor offers the highest speed resolution in the industry while simultaneously indicating direction.

 

CANbus communication and compliance with the Sauer-Danfoss PLUS+1 electronic control platform are among the strong new features.

 

Patented Contact-Free Sensing

Sauer-Danfoss has developed a patented contact-free sensing mechanism that follows the movement of a magnet inside a steel plug. Even small rotational movement is detected due to a direct connection to the cardan shaft via a flexible axle. A microcontroller inside the sensor measures both the speed and direction of the magnet as it rotates – a task that, until now, has required two sensors.

 

Additionally, the sensor’s high resolution capability ultimately removes the need for external tacho generators, decreasing costs for consumers.

 

“Pulse mode has 180 pulses per revolution as default setting, but can also be configured to a range between 20 and 120 pulses per revolution. The new measuring principle means the EMD speed sensor can deliver very precise measurements,” says Knud Meldgaard, product marketing manager.

 

Swift Integration

The EMD speed sensor is available with standard output signals, which can be customized. Standard configurations include pulse and quadrature output signals, and also a CANbus option for reliable data transfer. Using the PLUS+1 service tool, the sensor is simple to set up, customize and adapt to OEM requirements.

 

“Up to 253 EMD speed sensors can be connected to one CAN bus, saving on wiring and installation costs. PLUS+1 Compliance enables easy integration with other hydraulic components for optimum machine control,” Meldgaard says.

 

 

Click-On Mounting

Unlike its side-mounted predecessor, the EMD speed sensor is designed for click-on mounting in the motor end-cover. Here, the angle can be easily adjusted for optimum wiring. Configuration to existing orbital motors is simple using the EMD speed sensor plug. The design allows easy field servicing because the sensor is not in contact with the hydraulic oil.

 

Tough In All Conditions

The EMD speed sensor continues Sauer-Danfoss’ reputation for extreme robustness. Being highly shock resistant and watertight (IP 69 K), this sensor is free of corroding parts, and can survive the most hostile environments.