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Microchip Technology EV78U65A MCHV-230VAC-1.5kW Development Board

Microchip Technology EV78U65A MCHV-230VAC-1.5kW Development Board is a high-voltage motor control platform for developing and evaluating advanced motor drive applications. The board supports Permanent Magnet Synchronous Motors (PMSMs), Brushless DC (BLDC) motors, and AC Induction Motors (ACIMs) for both sensored and sensorless operation. The board features a three-phase inverter with an integrated power module and single-stage boost Power Factor Correction (PFC). The board operates from 90VAC to 230VAC inputs and delivers up to 1.5kW output power.

Designed for the Motor Control System Development Tool Ecosystem, the Microchip EV78U65A supports interchangeable motor control DIMs based on dsPIC® Digital Signal Controllers (DSCs), SAM, and PIC32 devices. The development board includes current and voltage sensing, Hall-sensor inputs, quadrature-encoder support, and isolated debugging interfaces. These features help accelerate motor control design for Heating, Ventilation, and Air Conditioning (HVAC) systems, industrial automation, appliances, and power conversion equipment.

Features

  • Three-phase motor control inverter board
    • Three-phase motor control inverter based on a power module
    • Motor phase current feedback for all three phases of the inverter
    • DC bus current feedback for overcurrent protection and to demonstrate a single-shunt current reconstruction algorithm
    • DC bus voltage feedback
    • Hardware overcurrent protection
    • Phase voltage feedback to implement sensorless back-EMF (BEMF) trapezoidal control of a BLDC motor or flying-start (windmilling) algorithms
    • Hall sensor interface connector
    • Quadrature Encoder Interface (QEI) connector to interface an optical/incremental shaft encoder
    • Power module temperature measurement
    • Isolated PKoB4 daughter board for programming
    • Isolated USB-UART interface for debugging and communication
    • 120-pin edge card connector to interface dual in-line modules (DIMs) or controller boards
    • User interface elements
      • Two debug LEDs
      • Two push buttons (isolated)
      • One potentiometer (isolated)
      • MCU reset push button (isolated)
      • PWM output enable/disable jumper (isolated)
      • Power-on status indication LEDs
      • Six PWM indication LEDs
    • One double-row header for interfacing add-on boards or other user interface boards for extended functionality (non-isolated)
    • One double-row header for interfacing the PFC board (non-isolated)
    • Auxiliary power supply to power the circuit board components and external interfaces
    • Additional low-voltage DC power supply (30VDC to 15VDC) for powering the signal circuitry during standalone operation of the inverter board
  • Single-stage boost PFC board
    • 90VAC RMS to 230VAC RMS nominal input voltage
    • EMI filter, rectifier, and DC bus capacitor precharge circuit
    • Circuits to measure AC input voltage, DC output voltage, and inductor current to implement digital PFC control
    • Overvoltage and overcurrent detection circuit
    • Dynamic brake circuit
    • Auxiliary power supply circuit
    • Power-on status indication LEDs
    • One double-row header to interface with the inverter board or controller board (non-isolated)

Applications

  • Three-phase Permanent Magnet Synchronous Motor (PMSM) drives for industrial and commercial equipment
  • BLDC motor control systems requiring advanced control algorithms such as FOC
  • ACIM drive applications operating from 90VAC to 230VAC input supplies
  • Sensorless motor control designs utilizing back-EMF detection, flying-start capability, and digital control techniques
  • Sensored motor drives using Hall-effect sensors and quadrature encoder interfaces for precise speed and position feedback
  • Variable-speed motor systems in appliances, pumps, fans, compressors, and HVAC equipment
  • Energy-efficient motor drives requiring integrated PFC and motor control functionality
  • Evaluation of motor control solutions based on dsPIC DSCs, SAM, PIC32MK, PIC32MC, and PIC32C microcontrollers
  • Development of inductive load control systems, including custom three-phase and single-phase power conversion applications

Kit Contents

  • MCHV-230VAC-1.5kW development board
  • dsPIC33AK128MC106 motor control DIM (EV68M17A)
  • 2x USB cable assemblies
  • Screwdriver

Application Notes

  • AN957 - Sensor-Based BLDC Motor Control Using dsPIC30F2010
  • AN1017 - Sinusoidal Control of PMSM Motors with dsPIC30F DSC
  • AN1078 - Sensorless FOC of a PMSM
  • AN1160 - Sensorless BLDC Control with Back-EMF Filtering Using a Majority Function
  • AN1206 - Sensorless FOC of an ACIM Using Field Weakening
  • AN1292 - Sensorless FOC for a Permanent Magnet Synchronous Motor (PMSM) Using a PLL Estimator and Field Weakening
  • AN2520 - Sensorless FOC for a PMSM Using a PLL Estimator and Equation-Based Flux Weakening
  • AN2584 - Integrated PFC and Sensorless FOC System for Microchip 32-bit Microcontrollers
  • AN4064 - Sensored (Hall Effect Sensor-Based) FOC of Three-Phase BLDC Motor Using dsPIC33CK
  • AN4764 - FOC of a Three-Phase BLDC Motor Using a Rotary Inductive Position Sensor
  • AN5419 - Sensorless Drive for Single-Phase BLDC Motor Using dsPIC33CK

Overview

Mechanical Drawing - Microchip Technology EV78U65A MCHV-230VAC-1.5kW Development Board

Block Diagram

Block Diagram - Microchip Technology EV78U65A MCHV-230VAC-1.5kW Development Board

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Veröffentlichungsdatum: 2026-11-06 | Aktualisiert: 2026-11-06