New Industry Products

3-Phase Sensorless BLDC Motor Development Kit

June 05, 2019 by Paul Shepard

The MTRDEVKSBNK144 from NXP is a development kit engineered for sensorless applications requiring one Brushless Direct Current (BLDC) motor, such as heating, ventilation, and air conditioning (HVAC) or electric pumps.

Based on the 32-bit Arm® Cortex®-M based S32K1 microcontroller family, the MTRDEVKSBNK144 enables rapid prototyping and evaluation of the BLDC application without having to wait for the final hardware design.

The MTRDEVKSBNK144 application software takes advantage of the Automotive Math and Motor Control Library Set and provides a complete reference implementation of the sensorless BLDC motor control application.

Technical and functional specifications of the MTRDEVKSBNK144:

  • Microcontroller
    • 32-bit Arm® Cortex®-M4F based S32K144 MCU
  • Integrated Circuit
    • GD3000: 3-Phase Brushless Motor Pre-Driver
  • Functional
    • DC-bus overvoltage, overcurrent, and under-voltage and stall fault detection
  • Compatibility
    • DEVKIT-MOTORGD integrated motor control shield compatible
  • Interfaces
    • Onboard interfaces for CAN bus and SCI (sharing the openSDA interface)
    • Onboard interfaces for LIN 10 PN7462 samples
  • Power
    • Supports low-voltage PMSM motors
  • Software enablement
    • ANSI-C based example SW created in S32 Design Studio for Arm® v1.3 built on S32 SDK v1.0.0
    • FreeMASTER visualization/configuration support
    • MCAT tool 1.1 part of software package
    • MCU peripherals initialization generated by Processor Expert

GD3000 block diagram

The GD3000 is a gate driver IC for three-phase motor drive applications providing three half-bridge drivers, each capable of driving two N-channel MOSFETs. Features of the GD3000 include:

  • Supports 1A to 2.5A peak current capability
  • Can operate off of a single power supply with a wide range from 6V to 60V with 75V transient protection
  • Uses a bootstrap gate driver architecture with trickle charge circuitry to support 100% duty cycle
  • Uses programmable cross-talk protection when the high-side or low-side MOSFET is switching to prevent flow of current
  • Integrated VDS sensing of the high-side and low-side MOSFETs is used to protect the external power stage against over-current conditions
  • Includes a current shunt amplifier for accurate current measurement for phase error detection
  • The IC interfaces to a MCU via six direct input control signals, a SPI port for device setup and asynchronous reset, enable and interrupt signals. Both 5.0 and 3.0 V logic level inputs are accepted and 5.0 V logic level outputs are provided.