Microcontrollers for Dishwashers

An inverter motor gives a powerful water jet, low vibration and low noise. Microcontrollers are used for IGBT s for motor drive, water supply valves, drain valve motors and operation panels. We offer customers microcontrollers with Vector Engine, in addition to square-wave and sine-wave control, that bring efficient control for supplying and discharging water, for realizing low vibration and low noise.

The Basic Concept of The Product

Motor Control Microcontrollers (with Vector Engine): Recently, high-level of control technology is employed to improve efficiency and improve smooth rotation. We now widen our portfolio of microcontrollers containing a Vector Engine (M370 Group (Note)), for controlling multiple motors efficiently and smoothly. The Vector Engine is a dedicated hardware that automatically performs basic processing of the Vector control (coordinate transformation, aspect conversion and SIN/COS computation) and executes the PI controller to control electric current. The Vector Engine, operating in conjunction with 3-phase PWM output circuit and 12-bit AD converter, reduces software processing and CPU load.
Circuits of the Vector Engine consist of the following sections:

Arithmetic unit to execute processing (called a task for Vector Engine).
Scheduler to control the operation of tasks.
Interface between an AD converter and PWM output.

An interrupt signal from an AD converter activates the Vector Engine. The Vector Engine acquires data from the AD conversion result register and executes computing such as coordinate transformation and aspect conversion. Complex computation using complicated software is no longer required, because the Vector Engine automatically performs the PI control for controlling speed, aspect conversion using space vector and puts data into the PWM output circuit. Users can significantly reduce the CPU load (Using our sample software, software processing time was 1/4). Users can also use their software for controlling flexible parts such as rotor position and speed.

5V Microcontrollers for General Applications (with Multi-purpose Timers): We offer multi-purpose microcontrollers(M380 Group(Note)) for 5V power supply containing multi-purpose timers (timer/counter + IGBT + PMD control) which is ideal for relatively simple motor control (sensorless square-wave control and sensored sine-sine wave control). The TMPM380 is provided as a 100-pin package. This product can control two motors using a multi-purpose timer.

Note: Arm^® Cortex^®-M3 Microcontrollers : TX03 Series

* Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.