IP for sensors provide motion control for critical motors

Enhancements to FPGA-based, deterministic, multi-axis motor control is available from Microsemi in the form of two IP offerings.

A Resolver interface and a Sinc3 filter both support designs using resolver sensors. The company has also announced an IP reference design for brushless DC (BLDC) motors leveraging the Resolver interface.

The company’s development environment comprises a modular IP suite, hardware kit and GUI for simplified development and debugging of a design. The latest IP targets motor control applications using a resolver sensor to find the position and speed of a rotor. Resolvers are used in applications which operate in harsh/rugged environments such as extreme temperatures, oil and dirt and are also preferred in space applications because of suitability in high-radiation environments as compared to other sensors like optical encoders.

The IP enables integration of functions such as industrial communication, human machine interface (HMI) and sensor interface required for modern drives and industrial control systems.

For motor control IP support for the SmartFusion 2 SoC FPGAs, Igloo 2 FPGAs and RTG4 FPGAs, the company provides a library of pre-tested and hardware-validated IP cores, reference designs for stepper and BLDC in sensor and sensorless configurations, a hardware board with BLDC and stepper motors, and GUI-based software with advanced features for optimizing and debugging the design.

The motor control IP suite supports the key motor control algorithms for BLDC in both field-oriented control sensorless and sensor configurations, as well as the stepper motor, using an advanced microstepping algorithm. It is scalable to a multi-axis motor drive design. Motor control IPs can be reused and ported across designs using Libero SoC Design Suite of development tools for designing with SmartFusion2, Igloo 2 and RTG4 FPGAs. The suite integrates industry standard Synopsys Synplify Pro synthesis and Mentor Graphics ModelSim simulation with constraints management, debug capabilities and secure production programming support.

Target markets include industrial, medical, automotive, defence and aviation, where the enhanced motor control can be used for high efficiency motors, multi-type motor designs, high RPM performance and high precision stepper motor designs.

For designs using a resolver with a BLDC and permanent-magnet synchronous motor (PMSM) motors, it can be used in control systems on spacecraft and satellites, actuator electronics used in aircraft, factory automation and robotics, including industrial tooling (CNC), oil and gas automation machinery; medical diagnostic and surgical equipment; and motor control in electric vehicles.

The Resolver interface IP is implemented in FPGA fabric. It has a resolver digital converter (RDC) sub-block which processes resolver signals from its secondary windings and converts them to a digital angle/rotor angle format and speed. It also provides a square wave output signal which is used to drive the primary windings of resolver. A calibration feature aligns resolver ‘zero’ position to motor ‘zero’ position and integrates both resolver driver signal as well as demodulation of resolver secondary signals.

The Sinc3 filter IP is a digital low-pass filter IP implemented in FPGA fabric to demodulate the output of a delta-sigma ADC.

http://www.microsemi.com

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