Texas Instruments Inc created a microcontroller that eliminates the need for an extra resolver-to-digital converter IC in precision servo motor control systems — the 32-bit C2000(TM) Delfino(TM) microcontrollers.

The microcontrollers function as resolver-to-digital converter interfaces for motor control systems. It also slashes cost while providing more efficient motor control capabilities.

These microcontrollers are an excellent alternative to the more complex and expensive semiconductor solutions, thanks to its high-precision on-chip, analog-to-digital converter, and low-cost external signal conditioning circuit.

In addition, encoders and resolvers are typically used in precision servo motor control systems including traction control, industrial drives and automotive power steering. Its encoders and resolvers also deliver shaft position feedback to the control unit. Also, its resolvers are very precise and are immune to noise, making them more durable than the encoders. However, resolvers need a unique precision resolver-to-digital converter to interface to a digital control system. But these converters add cost and complexity to the motor control solution.

Delfino microcontrollers can replicate this function of generating an excitation signal, as well as sampling and processing the feedback to get the angular reading, without requiring a dedicated resolver-to-digital converter. This allows the control of speed, torque and position with even greater precision. Moreover, upgraded Delfino microcontroller resolver software is available for free.

Furthermore, the Delfino microcontrollers can deliver quick and interrupted response, minimal latency, real-time data analysis and can implement complex control algorithms thanks to its up to 300 MHz C28x core.

Texas Instruments Inc.
www.ti.com