This　paper　describes　an　experimental　test-bench　based　on　multi-pulse　and　multilevel　converters　proposed　for　research　and　development　projects　related　with　classical　power　electronics　converters　for　high-power　applications.　The　developed　system　is　rated　18-kW　and　regroups　in　a　single　set-up　most　used　converter　topologies　in　electric　drive　and　grid-connected.　It　is　consisting　of　a　3-level　neutral-point　clamped　(NPC)　inverter,　an　18-pulse　rectifier　and　a　multilevel　cascaded　H-bridge　system.　The　practical　implementation　of　such　system　for　laboratory　use　is　a　time-consuming　task,　mostly　for　beginners　and　students.　Thus,　this　paper　can　serve　as　a　reference　design　and　complete　our　previous　works　where　no　details　about　this　platform　were　given.　The　proposed　system　has　been　used　to　demonstrate　reversible　transfer　of　electrical　and　mechanical　harmonics　for　pulsating　torque　analysis　and　advanced　modulation　and　control　schemes.　Test　results　obtained　confirm　that,　diverse　advanced　analysis　related　with　classical　converters　can　be　achieved　by　using　a　single　test　rig　and　significantly　save　time　and　enables　researchers　to　be　focused　on　the　system　analysis　and　control　software　development.