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Cost Effective 32-bit BLDC Motor Control with PIC32MM

Part Number: PIC32MM-Motor-Control

Summary:

The BLDC motors are being used extensively for both consumer and industrial applications due to its compact size, controllability, high efficiency and low maintenance cost. With the advancements in microcontrollers (MCUs), the motor control industry is focusing on designing MCU based low-cost motor control solutions for various applications.

If low cost is one of the primary

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Product Features

    Key Features of the Demo kit:
    1. PIC32MM0064GPL036 Motor Control Plug-in-Module
      • 32-bit low power microcontroller with microAptiv™ Core delivering 1.5DMIPS/MHz
      • Compatible with Microchip’s dsPICDEM™ MCLV-2 Development Board and dsPICDEM™ MCHV-2 Development Board
      • Option to utilize internal comparators, external Op-Amps
      • Access Points for debugging
    2. dsPICDEM™ MCLV-2 Development Board
      • Three-phase inverter bridge with a power rating of 48V/15A
      • Phase voltage feedback for sensorless BLDC operation
      • Overcurrent protection 
      • Input/output control switches 
      • Potentiometer 
      • LED indicator for PWM outputs

Summary

The BLDC motors are being used extensively for both consumer and industrial applications due to its compact size, controllability, high efficiency and low maintenance cost. With the advancements in microcontrollers (MCUs), the motor control industry is focusing on designing MCU based low-cost motor control solutions for various applications.

If low cost is one of the primary concerns, then Microchip's PIC32MM family of Low Power, Low Cost, 32-bit MCUs address the motor control requirements. The PIC32MM devices include Core Independent Peripherals (CIPs), designed to offload the CPU, such as Comparators and Multiple/Single-output Capture Compare PWM (MCCPs/SCCPs). These CIPs enable implementing “Sensorless Trapezoidal BLDC Motor Control with Back-EMF Filtering Using Majority Function” which requires minimal external hardware, thus optimizing the overall BoM.

What makes the Solution Cost effective?
Low Cost of 32-bit PIC32MM MCUs
Integrated CIPs on PIC32MM offer higher integration reducing external components requirement
Characteristics of the Solution:
Tracking trapezoidal BEMF signals to detect the zero-crossing points
PWM ON-side ADC sampling to reduce noise and solve low-inductance problems
Filtering the signals using majority function
Commutate the motor driving voltages in:
Open / Closed-Loop / Proportional-Integral (PI) Controller
Suitable for use on a wide range of motors (both Y and delta-connected 3-phase motors)
Requires no detailed knowledge of motor parameters and relatively insensitive to tolerance variations

32-bit PIC32MM Sensorless BLDC Motor Control Demo
For a quick evaluation and development, the solution is implemented on a demo kit comprising dsPICDEM™ MCLV-2 Development Board and PIC32MM0064GPL036 Motor Control Plug-in-Module (PIM). The MCLV-2 Board is targeted to control a BLDC motor in sensor or sensorless mode. This flexible and cost effective kit can be configured in different ways for use with Microchip’s specialized PIC32MM0064GPL036 Motor Control PIM.

For high voltage application, the solution works seamlessly on dsPICDEM™ MCHV-2 Development Board with PIC32MM0064GPL036 Motor Control PIM.

For further details on the 32-bit PIC32MM Sensorless BLDC Motor Control solution and the demo kit, contact us @ PIC32MM-Motor-Control@microchip.com or get in touch your regional Microchip Client Engagement Manager.

Need advanced Motor Control Solutions? Visit Microchip’s Motor Control Design Center

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