Abstract
Energy efficient current control methods in electromagnetic linear actuators are required to minimize the electrical power requirements imposed by active vibration control strategies. In this paper an efficient bidirectional buck-boost converter is discussed in two scenarios: an active vibration isolation system and an active dynamic vibration absorber ( ADVA ) using a voice coil motor (VCM) actuator. An electrical analogous circuit of an experimental test platform is used as part of the simulation model. This test platform is based on a vibration shaker that provides the based excitation required for the single Degree of-Freedom (1DoF) vibration model under study. The proposed bidirectional non-isolated buck-boost converter can recover the energy when the VCM acts as a generator and store it for future use. Simulation results prove that this type of topology is far more efficient than linear amplifiers typically used in active vibration control. Within the context of slender structures, this efficient current control method improves the viability of using active vibration control in flexible structures such as beams.
Highlights
Keywor ds: a cti veDVA, bi dir e cti o n al DCconv ert ers, s wit c hi ngpow er a m plifi er, b u c k -b o ost, v oi c e c oil m ot ors
I n t his p a p er a n effi ci e nt bi dir e cti o n al b u c k -b o ost c o n v ert er is dis c uss edintwoscen ari os: a n a cti v e vi br ati o n is ol ati o n s yst emandana cti vedyna mi c vi br ati o n a bs or b er ( A D V A ) usi n g a v oi c e c oil m ot or ( V C M) a ct u at or
T h e pr oposed bi dir e cti o n al n o n -is ol at edbuck-b o ost c o n v ert er canrecov er theen er gywhentheVCMa cts as a g e n er at or a n d st or e it f or f ut ur e us e
Summary
- Active vibration control of a plate using vibration gradients T Kaizuka and K Nakano. E n er g y effi ci e nt c urr e nt c o ntr ol m et h o ds i n el e ctr omagn eti c li n e ar a ct u at ors ar e r e q uir e d t o mi ni mi zethe el e ctri c al p o w er r e q uir e m e nts imposedbya cti v e vi br ati o n c o ntr ol str at e gi e s. T his el e ctri c al a n al o g y is us edtos et acomp aris o n b et weena li n e ar bri d g e c urr e nt c o ntr ol a m plifi er andas wit chmodepow er a m plifi er ( cl ass D) b as edona bi dir e cti o n al b u c k -b o ost c o n v ert er. T h e d efi niti o n is shownin ( 2) w h er e V C M is t h e m ot or c o nst a nt; N is thenumb er of t ur ns; βthemagn eti c fl u x d e nsit yinthegapandlthelen gt h of thewounded wir e
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