The　present　paper　deals　with　a　review　on　bearing　currents　in　electrical　machines,　with　major　emphasis　on　mechanisms,　impacts,　and　mitigation　strategies.　High-frequency　common-mode　voltages　from　the　inverter-driven　system　have　been　found　to　be　the　main　reason　for　bearing　current　leading　to　motor　bearing　degradation　and　eventual　failure.　This　paper　deals　with　bearing　currents-electrical　discharge　machining　(EDM)　currents,　circulating　bearing　currents,　and　rotor-to-ground　bearing　currents-and　the　various　methods　of　their　generation　and　effects　that　are　harmful　to　the　bearings　and　lubricants　of　a　motor.　Mitigation　techniques,　among　which　the　following　have　been　taken　into　account,　are　studied　in　this　context:　the　optimization　of　PWM　modulation,　and　the　use　of　shaft　grounding　brushes,　insulated　bearings,　and　passive　or　active　filters.　Finally,　advantages,　limitations,　and　implementation　challenges　are　discussed.　A　review　comparing　three-phase　and　dual　three-phase　inverters　showed　that,　due　to　the　increased　degree　of　freedom　in　modulation　strategies,　it　is　possible　to　eliminate　common-mode　voltages　through　active　modulation　techniques.　Such　added　flexibility　will　reduce　the　risk　of　bearing　currents　effectively.　It　also　highlights　future　research　directions　in　bearing　current　suppression,　including　the　development　of　multi-phase　motor　systems,　real-time　monitoring　technologies　with　artificial　intelligence,　and　the　use　of　new　insulation　materials　for　the　enhancement　of　bearing　reliability.　The　results　obtained　should　guide　future　research　and　engineering　practices　in　suppressing　bearing　currents　to　improve　motor　durability　with　high　performance.