Product Brief
Fujitsu's MB91580 32-bit MCUs enable highly efficient electric and hybrid vehicle motor control
Toni McConnel6/28/2011 5:11 PM EDT
Comment
D-FlipFlop
Thank you for your comments. The FPU need comes from the fact that Fujitsu uses ...
Tom.Minnich
A long time ago I did trapezoidal brushless motor control. We found it useful to ...
Fujitsu Semiconductor America's new MB91580 32-bit microcontrollers (MCUs) combine excellent performance with a wide range of peripheral functions to enable optimal, high-speed and highly efficient 3-phase inverter motor control in electric (EV) and hybrid vehicles (HV).
The new series is part of the FR family of 32-bit RISC architecture microcontrollers that incorporate embedded Flash memory and feature optimized, high-performance peripherals for EV and HV 3-phase inverter motor control. Applications include EV/HV motor and electric generator control, as well as generic, high-performance, electric motor control.
Highly efficient loopback control is achieved by using 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 latest and most advanced FR core to deliver 160DMIPS 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 resulting solution delivers highly optimized, real-time controllability for EV and HV motors with fast and efficient loopback operation, and the best torque control possible. This level of integration and performance enables system designers to reduce overall motor and motor-control unit costs significantly.
The three members in the series are the MB91F585 (with 576 KB Flash and 48 KB RAM); the MB91F586 (with 832 KB Flash and 64 KB RAM); and the MB91F587 (with 1088 KB Flash and 96 KB RAM).
The MB91580 microcontrollers use a dedicated embedded resolver sensor interface to control the three-phase inverter, resulting in optimal motor controllability. This enables the system designer to achieve higher performance while lowering the system cost.
The new MCUs are available now, and come in 144-pin quad flat packages. Sample pricing starts at $25 each. More information is available at fujitsu.com/semi/mcu/HEV-EV.
Toni McConnel can be reached at Toni@TechRite-Associates.com.
The new series is part of the FR family of 32-bit RISC architecture microcontrollers that incorporate embedded Flash memory and feature optimized, high-performance peripherals for EV and HV 3-phase inverter motor control. Applications include EV/HV motor and electric generator control, as well as generic, high-performance, electric motor control.
Highly efficient loopback control is achieved by using 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 latest and most advanced FR core to deliver 160DMIPS 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 resulting solution delivers highly optimized, real-time controllability for EV and HV motors with fast and efficient loopback operation, and the best torque control possible. This level of integration and performance enables system designers to reduce overall motor and motor-control unit costs significantly.
The three members in the series are the MB91F585 (with 576 KB Flash and 48 KB RAM); the MB91F586 (with 832 KB Flash and 64 KB RAM); and the MB91F587 (with 1088 KB Flash and 96 KB RAM).
The MB91580 microcontrollers use a dedicated embedded resolver sensor interface to control the three-phase inverter, resulting in optimal motor controllability. This enables the system designer to achieve higher performance while lowering the system cost.
The new MCUs are available now, and come in 144-pin quad flat packages. Sample pricing starts at $25 each. More information is available at fujitsu.com/semi/mcu/HEV-EV.
Toni McConnel can be reached at Toni@TechRite-Associates.com.
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Dr DSP
7/2/2011 4:00 PM EDT
Do you really need floating point for motor control? Wow...
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Tom.Minnich
7/7/2011 9:36 AM EDT
A long time ago I did trapezoidal brushless motor control. We found it useful to have some internal states that were 48bits. We also found it useful to have a parameters to cause shifts a after multiplies. So in some respects we were getting close to a floating point implementation some twenty years ago.
I am not sure if I have proved or disproved your point.
Best Regards
Tom M.
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D-FlipFlop
10/13/2011 4:48 PM EDT
Thank you for your comments. The FPU need comes from the fact that Fujitsu uses Matlab for mathematical modeling of motor control algorithms. Matlab uses floating point data and, therefore, the integrated FPU supports best porting capability for the optimum result.
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