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Control strategies and power converter topologies for switched reluctance motors in electric...
power density, low efficiency, and a complex cool- smart charging hubs that incorporate vehicle-to-
ing mechanism. PMSMs are medium in size and grid technology, facilitating the stabilization of
weight, provide a wide constant-torque range, renewable energy grids through EVs while con-
high power density, and high efficiency; however, currently lowering charging expenses. SRMs are
they are costly and require permanent magnets. gaining recognition in motor technology as a vi-
In contrast, SRMs are compact, low-cost, light- able and economical substitute for PMSMs due
weight, and have excellent fault tolerance and to their robust design, inherent fault tolerance,
overload capability. and the elimination of rare-earth materials in
their construction. 9,10,15 However, they demon-
strate an increased torque ripple ranging from
10% to 15% under traditional control methods,
alongside elevated acoustic noise levels that are
5–10 dB greater than those of PMSMs. 16 These
factors significantly influence the smoothness of
the drivetrain and the comfort of passengers.

Notwithstanding these limitations, SRMs can
achieve overall vehicle efficiencies of 85–92% un-
der optimal control, owing to their reduced core
losses at high speeds and their ability to op-
erate over a wide speed range without field
weakening. 17 A significant challenge exists in in-
tegrating SRMs with regenerative braking sys-
tems due to the complexities introduced by their
nonlinear inductance profile, which hinders ac-
curate torque control during deceleration. Ad-
vanced strategies such as predictive torque con-
trol enhance regenerative energy recovery rates,
achieving efficiencies of 75–80%, in contrast to the
85–90% efficiency observed in PMSMs. 18 More-
over, the absence of standardized inverter–motor
interfaces in SRMs necessitates the development
of tailored power electronics, thereby augmenting
system complexity. Prospective advancements in
wide-bandgap semiconductor inverters and artifi-
cial intelligence (AI)-optimized torque-ripple sup-
pression have the potential to address existing
challenges, positioning SRMs as a competitive op-
tion for next-generation EVs.

This paper presents a comprehensive review
of popular control technologies and power con-
verters utilized in SRM. The organization of the
Figure 4. Performance-based comparison among paper is as follows: after introducing SRM in Sec-
(A) direct current (DC) motor, (B) squirrel cage tion 1, Section 2 outlines the fundamental electro-
induction motor (SCIM), (C) permanent magnet magnetic equations significant to SRM. Section
synchronous motor (PMSM), and (D) switched
reluctance motor (SRM). Images created by the 3 provides a comprehensive review of the pop-
authors using Python software. ular control strategies employed in SRM appli-
cations. Section 4 introduces and compares the
most common power converter topologies utilized
The global EV market is experiencing signifi- for driving the SRM, emphasizing the advantages
cant developments in charging infrastructure, fo- and disadvantages associated with each topology.
cusing on ultra-fast charging networks (350–500 Section 5 presents a conclusion and recommends
kW), high-power wireless charging, and battery- the most suitable SRM drive for EV applications.
swapping solutions to address range limitations. Additionally, some future research domains have
Governments are emphasizing the development of also been highlighted.
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