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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