11 analysis of hybrid motor and drive for automotive application ldl uni aquila

Flux Conference 2012Analysis of Hybrid Motor and Drive

for Automotive Application

University of L’Aquila

2012 Flux Conference - Rome, Italy, October 17-18, 2012 2

L. Di Leonardo, M.Villani


A. Mpanda Mabwe, A.M. Gazdac

ESIEE Amiens

Analysis of Hybrid Motor and Drive forAutomotive Application



3

Contents

Introduction

Hybrid motor characteristics

Hybrid motor control

Results

Conclusions

2012 Flux Conference - Rome, Italy, October 17-18, 2012


4

Introduction

The Hybrid motor is a novel type of machine with dual-rotor(Permanent Magnet + Induction Machine).

Permanentmagnets

Steel tube

Laminatedstator

Shaft

Rotor bars

Outer andinner airgap

Respect to classical motor

More efficiency

More power density

More torque density



5

Motor data

MAIN DATARated power [kW] 6Synchronous speed [rpm] 1000Phase voltage [V] 230Rated efficiency % 90.0N. poles 6Outer stator diameter [mm] 200Stack length [mm] 135Number of stator slots 36Number of cage rotor slots 27



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Motor analysis by Flux and PortunusTo characterize the motor

Flux

To verify the control stategy

Flux + Portunus



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Mechanical characteristics (Flux)

Phase current =8.6 Arms(50 HZ)


Nm

Nm


8

Flux density with Iq only (Flux)



9

PM only

Stator current only


Iq + PM


10

Control of the motor speed in different operating conditions


Hybrid motor control



The growing demand of motors with high dynamicperformance requires not only an adequate (and moreefficient) designs procedure but also a fine motor analysistaking into account the driving control.


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The control strategy has been tested through a co-simulationbetween Portunus + Flux in order to optimization the wholesystem performance.

Motor design withsupport of FLUX

software

Motor design withsupport of FLUX

software

Estimationof control

parameters

Estimationof control

parameters

Performanceevalutation

Final resultsFinal results

Set the controlparameters



13

Control strategy

A certain cage-rotor speed(asynchronous motor) is assignedand the control changes thesynchronous speed (stator currentsand PM rotor) in order to satisfythe imposed value.

In this way, it is possible to obtain adesired cage-rotor speed indifferent load conditions.



14

Control scheme by Portunus

dec

oup

ling

Control loop ofsynchronous speed

*

PI(ωCR)

*ωs

ωCage

ωCage

The inner control loops imposethe synchronous speed by field-oriented control (FOC).

The motor performance arecalculated by Flux.

The outer control loop comparesthe imposed cage-rotor speedwith the actual value calculated byFlux.




Co-simulation results


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Speed of cage-rotor

Reference speed: 1000 rpm

Torque : 20 Nm


Speed [rpm]


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Torque

Torque [Nm]


Torque : 20 Nm



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Phase currents

Phase currents [A]

Current of phase A


Torque : 20 Nm



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Phase voltage

Phase voltage [V]


Torque : 20 Nm



20

d and q axis currents

Current [A] Reference speed: 1000 rpm

Torque : 20 Nm

Id

Iq



21

Conclusions


The Hybrid Motor with double rotor for automotive application has beensimulated by Flux software.

The co-simulation Portunus + Flux has allowed to analyze the Hybrid Motorperformance by taking into account the control strategy in order to verify thedynamic motor behavior.

This approach can be defined like as a “Virtual Experimental Test” and couldrepresent an effective tool for the analysis of motor performance and therefinement of motor design in order to improve and optimise the dynamicperformance.

11 analysis of hybrid motor and drive for automotive application ldl uni aquila

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