Vincent MignardSegment MarketingVincent.Mignard@Renesas.com 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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Image credits