Overview Industry demand precise electronic control actuators undersco

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Overview Industry demand precise electronic control actuators undersco

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Electromagnetic Actuator Control Using DSP56F80x
Overview Industry demand precise electronic control actuators underscores need sophisticated controllers that deliver high performance reasonable price. meet today's application demands precise actuator control from both position dynamic points view, actuator system requires cost-effective controller with flexibility speed process complex control algorithms. Benefits Uses complex algorithms provide precise actuator control flexibility Allows actuator control both directions Allows "soft" "hard" switching techniques Contains hardware fault protection block Built-in boot loader boot Flash
Coil Coil Cross Voltage Sensor
ELECTROMAGNETIC ACTUATOR CONTROLLED DSP56F80X
Voltage
DSP56F80x
High Side Driver
MC33887
Out-of-the-box software components designed expedite time-to-market reduce development costs.
Fault
Overcurrent Detection
Coil Current Sensor
Side Driver
Freescale Ordering Information
Part Number DSP56F801 Product Highlights MHz, MIPS, SCI, SPI, ADC, PWM, Quad Timer Program Flash Program Data Flash Data MHz, MIPS, SCI, ADC, PWM, Quad Timer Program Flash Program Data Flash Data MHz, MIPS, CAN, SCI, SPI, ADC, PWMs, Quadrature Decoder, Quad Timer 31.5K Program Flash 512K Program Data Flash Data MHz, MIPS, CAN, SCIs, SPI, ADC, PWMs, Quadrature Decoder, Quad Timer 31.5K Program Flash 512K Program Data Flash Data MHz, MIPS, CAN, SCIs, SPI, ADCs, PWMs, Quadrature Decoder, Quad Timer Program Flash Program Data Flash Data 250°C, Sleep Mode MHz, MIPS, 48KB Flash 12KB with SPI, SCI, ADC, PWM, COP, PLL, Decoder, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, on-chip relaxation oscillator, temperature sensor. MHz, MIPS, 48KB Flash 12KB with SPI, SCI, ADC, PWM, COP, PLL, Decoder, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, on-chip relaxation oscillator, temperature sensor. MHZ, MIPS, 144KB Flash 12KB RAM, with SPI, SCI, ADC, PWM, COP, PLL, Decoders, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, temperature sensor. MHZ, MIPS, 144KB Flash 12KB RAM, with SPI, SCI, ADC, PWM, COP, PLL, Decoders, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, temperature sensor. MHZ, MIPS, 144KB Flash 12KB RAM, with SPI, SCI, ADC, PWM, COP, PLL, Decoders, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, temperature sensor. Additional Information MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH GPIO available 48-pin LQFP.
DSP56F802
MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH GPIO available 32-pin LQFP.
DSP56F803
MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH, external memory expansion, GPIO available 100-pin LQFP.
DSP56F805
MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH, external memory expansion, GPIO available 144-pin LQFP.
DSP56F807
MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH, external memory expansion, GPIO available both 160-pin LQFP MAPBGA. www.freescale.com/analog Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 48-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 64-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 128-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 144-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 160-pin LQFP.
MC33887 MC56F8322
MC56F8323
MC56F8345
MC56F8346
MC56F8347
Design Challenges Actuator electromagnets typically controlled ON/OFF mode with simple electronic controller. However, increasing demand more precise control combustion engine's electric sophistication digital controller. digital controller increases actuator system flexibility executing complex algorithms from both position dynamic points view. Plus, very fast response electromagnetic systems drives need actuator systems highperformance controller conjunction with dedicated peripherals.
SG2083-2
Freescale Semiconductor Solution Freescale Semiconductor DSP56F80x family offers right combination performance peripherals actuator system control independent electromagnetic actuators. Functional Description These applications require control electromagnet coil's current. electromagnetic force actuator function current going through electromagnet coil. modulation current according predefined profile permits control instantaneous electromagnetic force generated electromagnet
thus movement position core. Typically, current modulated pulse width modulation (PWM) technique generated controller. actual current, force profile depends electromagnet construction application requirements.
figure page illustrates electromagnetic actuator containing controller, power stage with feedback sensors, electromagnet coil that controlled member Freescale Semiconductor DSP56F80x family. this application, just coil controlled, enabling control actuator movement direction. second coil using same hardware structure would permit DSP56F80x control movement actuator both directions. members DSP56F80x family contain same core same basic peripherals (PWM, ADC, Quadrature Timers, etc.), devices could used this type application. power stage contains power switches, half-bridge
configuration supplied voltage. Flyback diodes connected antiparallel power switches coil. individual switches driven high side drivers, both controlled directly DSP. voltage current sensors detect voltage cross current through coil. reads evaluates analog signals controls switches accordingly. practical implementation individual blocks depends level voltage required actuator output power. Possible Switching Techniques basic switching techniques switching hard switching (see figure below). With soft switching, upper switch
controlled while lower switch turned complete working interval. With hard switching, both upper lower switches controlled simultaneously PWM. Soft switching gives coil current with lower lower when upper switch turned during lower switch stays turned This results smoother output profile electromagnetic force. other hand, hard switching simpler from control point view. enables signal drive both power switches.
SOFT SWITCHING HARD SWITCHING TECHNIQUES
Coil Current
Coil Voltage
High Side Switch Side Switch time/position SOFT SWITCHING time/position HARD SWITCHING
upper switch lower flyback diode power stage omitted entirely. This configuration leads soft switching with long discharge interval working cycle, which results generation undesired electromagnetic force.
SG2083-3
During control cycle, coil current sensed controlled according required profile. choice current position profile, stored memory DSP, depends actual application requirement. control algorithm contains fast current loop executed rate
frequency. controller compares predefined actual current modifies duty cycle actual current follows correct shape.
Controller Operation obvious requirement controller dedicated unit fast analog-to-digital converter. Each module DSP56F80x family contains outputs variously configured, with extremely high degree freedom both hard soft switching techniques. outputs electromagnet coil used control power stage switches allowing each support three actuators. channels PWM0 PWM1 independent mode. soft switching mode DSP's Development Tools
Tool Type Software Software Product Name CW568X MSW3SDK000AA
generator controls upper switch, while lower switch directly software. hard switching mode, both switches controlled generator. Hardware Fault Protection module also contains hardware fault protection block. comparing actual current threshold, external comparator generates overcurrent fault signal. When connected fault input unit, overfault signal disables power stage case overcurrent.
This increases protection power electronics system. communication interface (SPI CAN) allows node communicate with other parts system. Out-of-the-box software components on-chip peripherals, combination with software libraries motor control, communication, signal processing, make easy develop most demanding realtime embedded applications.
Vendor Freescale Semiconductor Freescale Semiconductor
Description CodeWarriorDevelopment Studio 56800/E Hybrid Controllers with Processor Expert (Metrowerks) Software infrastructure that allows development efficient, high level software applications that fully portable reusable across 56800/56800E family processors. CodeWarrior Software Development Tools 56800 (Metrowerks) 56F800 Demonstration Evaluation Module 56F801and 56F802 Evaluation Module 56F803 Evaluation Module 56F805 Evaluation Module 56F807 56F8300 Developers Start Evaluation Module 56F8322 45F8323 Hybrid Controllers Evaluation Module 56F8345, 56F8346, 56F8347 Hybrid Controllers
Software Hardware Hardware Hardware Hardware Hardware Hardware Hardware Hardware
CWDSP56800 56F800DEMO DSP56F801EVM DSP56F803EVM DSP56F805EVM DSP56F807EVM MC56F8300DSK MC56F8323EVM MC56F8357EVM
Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor
Related Documentation
Document Number APDPAK SG1002 SG1004 SG1006 SG1011 Description Analog Integrated Solutions Pitch Pack Analog Product Selector Guide Digital Signal Processors Product Selector Guide Microcontrollers Product Selector Guide Software Development Tools Product Selector Guide
Disclaimer This document include details necessary completely develop this design. provided reference only intended demonstrate variety applications device.
Learn More: Contact Technical Information Center +1-800-521-6247 +1-480-768-2130. more information about Freescale products, please visit www.freescale.com.
Freescaleand Freescale logo trademarks Freescale Semiconductor, Inc. other product service names property their respective owners. Freescale Semiconductor, Inc. 2004. rights reserved. SG2083 12/2004
December2004

Overview Industry demand precise electronic control actuators undersco

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