Automotive electrical systems-the power electronics market of the future

Kassakian, J.G.

doi:10.1109/apec.2000.826075

Cited by 146 publications

(57 citation statements)

References 3 publications

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“…For the automotive subsystem, DC 12-V bus with lead acid battery is conventionally used. However, the 12-V current load is rapidly increased with development of automotives [1]. Heavier load current causes high energy consumption in wire-harness and conversion circuits.…”

Section: Introductionmentioning

confidence: 99%

28 W/cm<sup>3</sup> high power density three-port DC/DC converter cell for dual-voltage 12-V/48-V HEV subsystem

Itoh

Inoue

Ishigaki

2017

IEICE Electron. Express

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Realizing both of compact and low energy consumption is technical issue on development of electricity-rich automotive subsystems. In the present work, a 12-V/48-V dual-voltage subsystem using three-port DC/DC converter cells is proposed, and the high power density cell design is studied to achieve ultra-compact subsystem in hybrid-electric-vehicle. A 500 W, 400 kHz prototype is developed with GaN FETs, and its efficiencies are evaluated. The prototype achieves power density of 28 W/cm 3 at rated power, and its efficiency is measured more than 91% over a wide output power range, with a maximum efficiency of 93.7%.

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Section: Introductionmentioning

confidence: 99%

28 W/cm<sup>3</sup> high power density three-port DC/DC converter cell for dual-voltage 12-V/48-V HEV subsystem

Itoh

Inoue

Ishigaki

2017

IEICE Electron. Express

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“…The ISA system combines both starter and generator functions in a single electric machine, instead of having two separate machines, as is the case in conventional vehicles [1][2][3][4]. This innovative solution has been proposed as solution to implement the new PowerNet architecture in vehicles, an increase of the electrical bus voltage from 14V to 42V [5][6][7], and to replace the conventional Lundell alternator which is not able to meet the requirements of high power and voltage transients. In this context, the machine selection and design are being investigated intensively.…”

Section: Introductionmentioning

confidence: 99%

Vector Control of Double Excited Synchronous Machine as Integrated Starter-Alternator

2014

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Original scientific paperThe paper proposes a double excited synchronous machine as integrated starter-alternator for future automobiles applications. Particularly, the biaxial excitation synchronous machine (BESM) is proposed for its high efficiency and wide constant power speed range. As the integrated starter-alternator system combines both starter and generator functions in a single electric machine, an alternative vector control strategy for BESM is developed and detailed to allow operation in the two modes at unity power factor operation by setting d-axis current to be zero and q-axis current to be constant and equal to its value that cancel the q-axis flux. In such conditions, the BESM torque can be controlled by the dc-excitation current and the required dc-bus voltage can be regulated within the 42V PowerNet specifications. To overcome the slowness dc-excitation current response, which is due to higher dc-field excitation time constant, and to increase the torque response quickness, the control of the magnetising current is proposed instead of the d-axis current. Implementation and simulation results validate the proposed scheme and provide a practical solution for an integrated starter-alternator.Key words: Biaxial excitation synchronous machine, Vector control, Integrated starter-alternator, 42V PowerNet Vektorsko upravljanje dvostruko pobu enim sinkronim strojem kao integriranim starteromalternatorom. U radu je predložena upotreba dvostruko pobu enog sinkronog stroja kao integriranog starteraalternatora, za buduće primjene u automobilskoj industriji. Preciznije, predložena je upotreba biaksijalno pobu enog sinkronog stroja (BESM) zbog visoke korisnosti i širokog raspona područja konstantne snage. Kao integrirani starter-alternator, sustav kombinira funkcije i startera i generatora u jednom električnom stroju. Razvijen je i detaljno opisan alternativni pristup vektorskom upravljanju BESM-om za omogućavanje rada u dva moda uz jedinični faktor snage postavljanjem d-osi struje u nulu i q-osi struje na konstantnu vrijednost koja poništava tok u q-osi. U ovakvim uvjetima, BESM momentom moguće je upravljati istosmjernom uzbudnom strujom i traženi napon dc-sabirnice moguće je regulirati unutar 42V PowerNet specifikacija. Za prevladavanje sporog odziva na istosmjernu uzbudnu struju koji nastaje zbog veće vremenske konstante magnetskog polja uzbude, a s ciljem ubrzanja odziva momenta, predloženo je upravljanje strujom magnetizacije umjesto strujom u d-osi. Implementacijski i simulacijski rezultati potvr uju predloženi pristup i pružaju praktično rješenje za integrirani starter-alternator.Ključne riječi: Biaksijalno pobu eni sinkroni stroj, vektorsko upravljanje, integrirani starter-alternator, 42V PowerNet

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“…A UTOMOTIVE manufacturers are currently looking into low-cost high-power alternators with wide constant-power speed ranges of up to 10 : 1 in order to satisfy the projected needs of next-generation vehicles [1]. A promising means for implementing such an alternator is to use an interior permanent-magnet (IPM) machine operating under uncontrolled generation (UCG), using a switched-mode rectifier to regulate the output voltage.…”

Section: A Backgroundmentioning

confidence: 99%

“…The standard method for analyzing salient-pole synchronous generators starts from knowledge of the magnitudes of the output voltage and the output current , as well as the phase difference between and , if any. From these, the rotor angle between the induced voltage and , and the magnitude of the induced voltage are determined from hence (1) where the -axis current component . The steady-state model used by Jahns assumes that the IPM machine phase currents are sinusoidal and free of harmonics during UCG operation and that the rectifier forces the phase currents to be strictly in phase with the phase voltages (as we are using the generator convention).…”

Section: A Steady-state Ucg Modelmentioning

confidence: 99%

Uncontrolled generation in interior permanent magnet machines

Liaw¹,

Soong²,

Welchko³

et al.

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.

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Abstract-The movement toward higher power automotive electrical systems has spurred research into low-cost alternators capable of operating over a wide constant-power speed range. A promising candidate for this application is a specially designed interior permanent-magnet (IPM) machine operating in uncontrolled generation (UCG). This paper investigates the modeling and performance of IPM machines in UCG. The concept of the voltage-current locus is introduced to explain the presence of hysteresis in the machine stator current and this effect is experimentally demonstrated. The effect of nonidealities such as magnetic saturation and stator resistance are also examined, to achieve a more accurate steady-state and dynamic modeling of the machine behavior. The predictions of these models are tested against experimental results.Index Terms-Interior permanent magnet (IPM), uncontrolled generation (UCG), voltage-current loci.

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Automotive electrical systems-the power electronics market of the future

Cited by 146 publications

References 3 publications

28 W/cm<sup>3</sup> high power density three-port DC/DC converter cell for dual-voltage 12-V/48-V HEV subsystem

28 W/cm<sup>3</sup> high power density three-port DC/DC converter cell for dual-voltage 12-V/48-V HEV subsystem

Vector Control of Double Excited Synchronous Machine as Integrated Starter-Alternator

Uncontrolled generation in interior permanent magnet machines

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