Fullerton, Calif. TT electronics BI Technologies Electronic Components Division is now shipping prototypes of its new MagneTorque compliant torque sensor to customers for evaluation and testing. The MagneTorque sensor is designed to complement BI's existing potentiometric-based torque sensor technology and targets automotive electric power steering systems.
Based on Hall effect technology, the MagneTorque sensors are designed to work over a maximum angle of ±8 degrees with a maximum error of 2%. Accuracy at zero degrees is better than 1%, said the company. These specifications include all sources of error and apply over the entire operating temperature range of -40°C to 150°C, making it beneficial for both column and rack designs.
The new sensors contain no sliding electrical contacts and provide two complementary analog output signals for redundancy and differential diagnostic options. This sensor incorporates a unique programmability feature that enables adjustable offset, gain and temperature compensation, and can be used to minimize steering system tolerances at the time of installation
Dan Sparks, vice president of new business development for BI Technologies said the programmability feature allows customers to use wider tolerances in their designs without tolerance stack-up concerns, which translate into lower component and manufacturing costs.
The durability of BI's MagneTorque sensor is dependent only on bearing selection and is expected to exceed 10 million revolutions, said the company. Prototypes can be supplied to fit a variety of steering shaft configurations and compliance angles.
Pricing will be less than $25.00 each in production quantities of 100,000+ annually. Delivery for standard prototypes is four weeks. Delivery for a special prototype design is eight weeks.
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