renesas: do you want to spare your time during motor calibration?
DESCRIPTION
Do you want to spare your time during motor calibration? If yes, please watch the webinar and discover how the recent inverter reference platforms based on RX62T & RX220 Microcontrollers can respond to the challenges you’re facing. Tuning the embedded software to your equipment requirements is becoming easier, especially for sensorless Field Oriented Control algorithms. The embedded software solves the time-consuming processes: • Auto-tuning of the current proportional-integral (PI) coefficients: Kp, Ki • Fast identification of intrinsic motor parameters: Rs, Ls, Λm • Real-time visualisation of the motor phase, current and step response Now, that’s your turn to use 30min of your precious time. Reference Platforms website: www.renesas.eu/motor Video/ Tutorial: http://www.youtube.com/watch?v=KrMXBWFfbY0TRANSCRIPT
Vincent MignardSegment [email protected] May 2014
Renesas Electronics Europe
00000-A
Rev. 1.10
Do you want to spare your time during Motor Calibration ?
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Team 3Industry
Team 2Transport
Team 1Health
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3-phase inverter prototype
3-phase PermanentMagnet Motor
3 Men 3 Months €100K
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100W | 24V | 6Amax
Up to 23000 RPMTorque: 690mNm
Permanent Magnet
Team 1
Key Requirements:• Provide accurate airway pressure• Ensure very quiet operations• Long lifetime is a must• Constant speed adaptation
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Team 2
Key Requirements:• Ensure best efficiency• No electrical & audible noise• Ensure long battery lifetime• Manage torque & speed changes
350W | 36V | 20Amax
Up to 400 RPMTorque: 15Nm
Permanent M
agnet
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Team 3
Key Requirements:• Ensure efficient air circulation• Manage air flow / volume• Ensure no vibration• Very low speed rotation
800W | 400V | 0.3Amin
Down to 15 RPMTorque: 1Nm
Permanent Magnet
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… 4 weeks later …
Team 1 Team 2
Team 3
Ventilator is running with single shunt algorithm Motor runs from 15RPM up to 400RPM A complete reference design is used Time to start Schematics, fail-safe software, etc.
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The 1st step is to select one of the Reference platform:
32-bit @ 32MHz50 DMIPS
32-bit @ 100MHz100 DMIPS with FPU
MCUSpecifications
InverterSystem
dynamics
PWM frequency: 16KHz 16KHzControl loop speed: Max. 15KHz Max. 16KHzVector Control loop: 57µs 40µsSensorless: 1 or 3 shunts 3 shunts
MCUResources
used by algo.
CPU load: 45% 60%Flash footprint: 24KB 14KBRAM usage: 3KB 2KBArithmetic Fixed-point Floating-pointPeripherals: MTU2 MTU3
12-bit A/D 12-bit A/D, PGA
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The 2nd step is to plug the kit to the motor and the PC
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The 3rd step is to run the auto-tuning after setting the Imax
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Team 1 Team 2
3-phase motor running with a reference prototype Motor runs on the complete speed range A complete reference design is used to build s/w appli. Schematics can also start, etc.
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What’s behind the auto-tuning algorithm?
Current PIAuto-tuning
Phase
Motor parameters identification
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What’s behind the two buttons:
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What’s behind the two buttons:
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• Sensorless Vector control (1 or 3 shunts)• Flux weakening enable by default• Auto-tuning of current PI coefficients• Motor automatic identification• Off-line automatic process• Flux estimator type selectable• Several PWM Modulations available• External power stage available
Royalty free embedded Software
… Let’s recapChoice of Motor Control Ref. Platforms
YROTATE-IT-RX220
YROTATE-IT-RX62T
Belo
w€2
00 !
• Permanent Magnet AC, AC/DC Brushless• Surface or interior Permanent Magnet• Inrunner & outrunner motors
3-phase Motor types supported
• RX111 Motor Control kit: 2Q’2014• Enhanced interface: oscillo, code
generation, alarms management, etc.
Next developments
• Schematics, gerber files, Bill of Material • for Kits and external 1.5KW power stage• Manuals, Starting Guide, Short intro.• Embedded software source code• PC Graphical User Interface
www.renesas.eu/motor Website contents
Auto-tuning Tutorial/video
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