Renesas Presents RX66T Motor Control MCU with Failure Detection Option

Press Release Summary:

The Failure Detection e-AI features of the RX66T MCU is designed for home appliances such as refrigerators, air conditioners and washing machines. The MCU is capable of detecting both motor control and e-AI based abnormality detection. The implementation of both e-AI-based and motor control-based detection help for preventive maintenance and triggering alarms when fault occurs. It can control up to four motor-equipped home appliances.

Original Press Release:

Renesas Electronics Simplifies Home Appliance Maintenance with Failure Detection e-AI Solution for Motor-Equipped Home Appliances

e-AI Development Environment Makes it Easy to Add Abnormality-Detection AI Functionality to RX66T Motor Control MCU for Failure Detection and Predictive Maintenance

TOKYO, Japan, January 21, 2019 – Renesas Electronics Corporation (TSE: 6723), a premier supplier of advanced semiconductor solutions, today announced the launch of its Failure Detection e-AI Solution for Motor-Equipped Home Appliances,

featuring the Renesas RX66T 32-bit microcontroller (MCU), this solution makes it possible to detect failure of home appliances such as refrigerators, air conditioners, and washing machines due to motor abnormality by using embedded AI (e-AI). Property data (e.g., current or rotation rate) that shows the motor’s status can be used directly for abnormality detection, making it possible to implement both motor control and e-AI–based abnormality detection with a single MCU, eliminating the need to add sensors.

Normal motor operation is monitored while the motor is running, and faults are detected in real time. The home appliance malfunctions often appear abnormally in the motor operation. By implementing e-AI-based and motor control-based detection, the failure detection results can be applied not only to trigger alarms when a fault occurs, but also for preventive maintanence, for instance to estimate when repairs and maintenance should be performed and to identify fault locations. This provides home appliance manufacturers the potential to boost maintenance operations efficiency and improve product safety by adding functionality that predicts faults before they occur in their products.

For example, the Failure Detection e-AI Solution for motor-equipped home appliances solution can control up to four motors because it utilizes the high-performance RX66T MCU. Today’s washing machines typically incorporate three motors: One to rotate the washing tub, one to drive the water circulation pump, and one to drive the drying fan. The Failure Detection e-AI Solution can therefore be used to control these three motors with a single RX66T chip while at the same time monitoring all three motors for faults.

The new solution utilizes the Renesas Motor Control Evaluation System and an RX66T CPU card. This hardware is combined with a set of sample program files that run on the RX66T MCU as well as a GUI tool that enables collecting and analyzing property data indicating motor states. In order to detect faults, it is necessary to learn the characteristics of the normal state. Using the GUI tool, system engineers can begin developing AI learning and optimized fault detection functionality immediately. Once the AI models are developed, the e-AI development environment (composed of an e-AI Translator, e-AI Checker, and e-AI Importer) can be easily used to import the learned AI models into the RX66T.

“Leveraging its extensive expertise in developing solutions for use in home appliances, Renesas has now developed a solution capable of detecting failures that affect the system based on detecting abnormal motor operation,” said Toru Moriya, Vice President of Home Business Division, Industrial Solutions Business Unit, at Renesas. “Even in cases where a fault occurs in the motor itself, it can be difficult to localize the source to determine whether there is an abnormality in the motor or in the inverter circuit. The new solution makes it possible to identify the fault location quickly, which has the potential to dramatically decrease the maintenance burden for customers.”

Moving forward, Renesas will continue to work toward the realization of a smart society by supporting the development of smart home appliances through enhanced endpoint intelligence in the operating technology (OT) field.


The Failure Detection e-AI Solution for Motor-Equipped Home Appliances is available now.

About Renesas Electronics Corporation

Renesas Electronics Corporation (TSE: 6723) delivers trusted embedded design innovation with complete semiconductor solutions that enable billions of connected, intelligent devices to enhance the way people work and live—securely and safely. A global leader in microcontrollers, analog, power, SoC products and integrated platforms, Renesas provides the expertise, quality, and comprehensive solutions for a broad range of Automotive, Industrial, Home Electronics, Office Automation and Information Communication Technology applications to help shape a limitless future. Learn more at

Media Contacts:

Renesas Electronics Corporation

Kyoko Okamoto

+81 3-6773-3001

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