Overview
Description
Renesas' Air Conditioner Outdoor Unit (ODU) reference design is a total solution for controlling outdoor air conditioning units. It is used in combination with the MCI-HV-AC which is AC200V high-voltage inverter board, communication board, and peripheral devices. It is capable of evaluating and developing dual motor control with the provided permanent magnet (PM) sensorless vector control sample code.
Features
- Reference design integrating the RX26T microcontroller and a 3-phase inverter circuit
- Dual motor control function (compressor and fan)
- Open-loop start (current pull-in control) during stop and low-speed operation
- PM sensorless vector control using induced voltage observer during medium to high-speed operation (1-shunt and 3-shunt)
- Flux weakening control for high-speed operation and maximum torque per ampere (MTPA) control for IPMSM
- Torque vibration suppression function, step-out detection, and flying start (catching control)
- Single-phase and interleaved PFC control (power factor correction and boost function)
- MCI-HV-AC inverter board features
- Supports single-phase AC input (AC100V ~ 240V, 50Hz/60Hz)
- Supports 2-motor (compressor, fan) control
- Equipped with overcurrent detection, overvoltage protection, and overheat detection functions
- Equipped with a four-way valve and expansion valve control interface
- Equipped with temperature control sensor interface
- Equipped with air conditioner indoor unit communication interface
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Manual - Hardware | PDF 1.27 MB 日本語 | |
| Application Note | PDF 4.23 MB 日本語 | |
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Design & Development
Software & Tools
Software & Tools
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Software type
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Company
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| Renesas Motor Workbench Renesas Motor Workbench is a development support tool for debugging, analyzing, and tuning motor control programs.
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Solution Toolkit | Renesas |
| e² studio Eclipse-based Renesas integrated development environment (IDE).
[Support MCU/MPU: RA, RE, RX, RL78, RH850, Renesas Synergy, RZ]
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IDE and Coding Tool | Renesas |
| CS+ Renesas integrated development environment (IDE) [Support MCU/MPU: RH850, V850, RX, RL78, 78K0R, 78K0]
(Note: CS+ is not generally promoted to U.S. and European customers.)
(Note: To use Smart Configurator on CS+ for RL78/G23 and RX family MCUs, install the Smart Configurator for each MCU family separately downloading from ”Design & Support” > ”Development Tools” > ”Smart Configurator”)
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IDE and Coding Tool | Renesas |
| RX Smart Configurator RX Smart Configurator is a utility for combining software in ways that meet your needs. It simplifies the embedding of Renesas drivers in your systems through supports for importing middleware and drivers and configuring pins.
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Solution Toolkit | Renesas |
4 items
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Sample Code
Related Boards & Kits
Development
MC-COM
Active
Renesas Flexible Motor Control Communication Board
MC-COM is a communication board for serial communication with Renesas MCUs. It can be connected to various CPU boards equipped with RA or RX microcontrollers. Since the communication signals are electrically isolated, motor control evaluation and debugging can be performed safely.
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Videos & Training
News & Blog Posts
Blog Post
Jun 4, 2025
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