MCUs enable high efficiency motor control in hybrid and electric vehicles

Fujitsu Semiconductor America Inc. announces a series of new 32-bit microcontrollers (MCUs) that combine high performance with myriad peripheral functions to enable high speed, high efficiency 3-phase inverter motor control in electric and hybrid vehicles (EV and HV).

The MB91580 series is part of the FR family of 32-bit RISC architecture MCUs, which incorporate embedded Flash memory and feature high-performance peripherals for EV and HV 3-phase inverter motor control. Applications include EV/HV motor and electric generator control, along with generic, high performance, electric motor control.

Highly efficient loopback control is achieved via a high-speed, dedicated 12-bit A/D converter and Resolver-to-Digital Converter (RDC). Dedicated hardware generates the required motor control parameters (such as the electrical angle's sine and cosine values) to accurately detect motor current and position at high speeds, enabling precise motor control waveform generation. The FR81S CPU uses the most advanced FR core to deliver 160 DMIPS high-performance calculating power. An IEEE-754-compliant Floating Point Unit enables the MCU to process vector conversion and PID control calculations rapidly, using data from the 12-bit A/D converter and RDC.

The result is superior real-time control for EV and HV motors with fast and efficient loopback operation, and excellent torque control. This level of integration and performance enables system designers to reduce overall motor and motor-control unit costs significantly.

The series includes the MB91F585 (576 KB Flash, 48 KB RAM); the MB91F586 (832 KB Flash, 64 KB RAM); and the MB91F587 (1,088 KB Flash, 96 KB RAM).

For more information, contact Fujitsu Semiconductor America Inc., 1250 East Arques Ave., M/S 333, Sunnyvale, CA 94085. Phone: (800) 866-8608.