Next generation electric drives for HEV/EV propulsion systems: Technology, trends and challenges

López, Iraide; Ibarra, Edorta; Matallana, Asier; Andreu, Jon; Kortabarria, Iñigo

doi:10.1016/j.rser.2019.109336

Cited by 133 publications

(72 citation statements)

References 212 publications

(385 reference statements)

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“…These big current peaks are usually mitigated by means of big capacitors, larger than would otherwise be required, in order to facilitate a smooth as possible energy flow in both directions [17]. Yet the DC bus is, by itself, rather a bulky part, and a major source of faults in modern power converters [36], as well as one of the elements with shortest service life [2]. And having to have exceedingly large capacitors makes things even worse.…”

Section: Do Srms Really Need Such Big Caps?mentioning

confidence: 99%

“…Nowadays, Permanent Magnet (PM) Synchronous Machine technology is preferred for EV and, especially, HEV applications due to a number of features such as high power density, high efficiency and reliability [1]- [3]. However, PM-based technology depends on the supply of rare-earth raw materials to manufacture the permanent magnets, usually made of NdFeB alloys [2]. But costs and availability of rare-earth magnets have been experiencing high fluctuations [4], particularly during the rare-earth crisis of 2010-2012 [5], and EVs/HEVs represent a cost-sensitive market.…”

Section: Introductionmentioning

confidence: 99%

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Synchronized Switching Modulation to Reduce the DC-Link Current in SRM Drives

et al. 2020

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Switched Reluctance Machines (SRM) are emerging as a possible alternative in terms of cost and supply stability to rare earth based electric vehicle traction systems. However, because of the huge amounts of energy stored and transferred back and forth between the DC source and the SRM, large DC-link capacitors must be used as buffers, which increases overall costs and size. This paper proposes a novel modulation technique which forces the exchange of energy between phases while decreasing the energy transfer between the DC bus and the SRM. This means lower DC bus currents (capacitor size and cost reduction) and lower Joule-effect conduction losses (better efficiency). The proposed modulation has been validated experimentally in a test bench and compared with the conventional torque-sharing function. INDEX TERMS Switched reluctance motors, motor current control, inverter modulation, capacitor current reduction.

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Section: Do Srms Really Need Such Big Caps?mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synchronized Switching Modulation to Reduce the DC-Link Current in SRM Drives

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, this solution increases the volume and cost of the converters. Yet the DC bus is, by itself, rather a bulky part, and a major source of faults in modern power converters [13], as well as one of the elements with shortest service of life [2]. Moreover, having to have exceedingly large capacitors makes thing ever worse.…”

Section: B Control Particularitiesmentioning

confidence: 99%

“…The cost of MPPF-Caps is about 1/3 of Al-Caps [2]. All this and the possibility to achieve higher power density DC-link designs in high ripple current applications, make the MPPF-Cap technology the preferred to automotive application [2].…”

Section: Automotive Capacitor Analysis a Capacitor Technology Formentioning

confidence: 99%

A Methodology to Determine the Effect of a Novel Modulation in the Reliability of an Automotive DC-Link Capacitor

et al. 2020

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Switched Reluctance Machines (SRM) are considered promising rare-earth free candidates for the next generation electrified vehicles. One of the main drawback of this technology is the need of a large DC-link capacitor to balance the energy transferred back and forth between the DC source and the SRM. There are interesting novel modulations to reduce the current of the DC bus, focused on the capacitor size and cost reduction but leaving aside the thermal analysis and lifetime improvements. Carrying out the required dynamic multi-physics simulations for that purpose becomes highly time consuming and complex, especially when standardized or real driving conditions are needed to be taken into account. This paper proposes a simulation methodology, simple to implement and with a relatively low computational cost, to estimate the lifetime of an automotive DC-link capacitor, with the current load it delivers as the starting point. The presented methodology has also been used to validate a novel SRM modulation technique and to compare it, in terms of reliability, with the conventional torque sharing function.

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“…As the automotive industry is on the edge of a major electrification transition, use of electric motors as the primary motive source for Electric Vehicle (EV) applications is increasingly growing [1,2]. Considering driving cycles of EVs, this new application of electric motors demands a high transition torque for accelerations [3,4]. As can be seen in Figure 1, transient operating capability of an electric motor is limited by its thermal limitations [5].…”

Section: Introductionmentioning

confidence: 99%

On Heat Transfer Performance of Cooling Systems Using Nanofluid for Electric Motor Applications

Deriszadeh

Monte

2020

Entropy

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This paper studies the fluid flow and heat transfer characteristics of nanofluids as advance coolants for the cooling system of electric motors. Investigations are carried out using numerical analysis for a cooling system with spiral channels. To solve the governing equations, computational fluid dynamics and 3D fluid motion analysis are used. The base fluid is water with a laminar flow. The fluid Reynolds number and turn-number of spiral channels are evaluation parameters. The effect of nanoparticles volume fraction in the base fluid on the heat transfer performance of the cooling system is studied. Increasing the volume fraction of nanoparticles leads to improving the heat transfer performance of the cooling system. On the other hand, a high-volume fraction of the nanofluid increases the pressure drop of the coolant fluid and increases the required pumping power. This paper aims at finding a trade-off between effective parameters by studying both fluid flow and heat transfer characteristics of the nanofluid.

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Next generation electric drives for HEV/EV propulsion systems: Technology, trends and challenges

Cited by 133 publications

References 212 publications

Synchronized Switching Modulation to Reduce the DC-Link Current in SRM Drives

Synchronized Switching Modulation to Reduce the DC-Link Current in SRM Drives

A Methodology to Determine the Effect of a Novel Modulation in the Reliability of an Automotive DC-Link Capacitor

On Heat Transfer Performance of Cooling Systems Using Nanofluid for Electric Motor Applications

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