Fault-Tolerant Operation of a Fully Electric Gearbox Equivalent

Dynamic Machine Operation Transitions

“…Thereby it is ensured that the current flowing through S s [a,b,c] can be redirected. Next, switches S [a,b,c] [3,4,5,6] start switching in the same manner as S [a,b,c] [7,8,1,2] , respectively. The time required to execute the whole transition sequence depends mainly on the turn off time of S s [a,b,c] , and the time required to start driving and controlling S [a,b,c] [3,4,5,6] such that the currents of the two coils per phase are equal.…”

“…The method however, is not restricted to this machine, but can be generally applied to multi-phase electrical machines. Details and parameters on the applied PMSM can be found in [8].…”

“…Whether T el is continuous in the range 0 ≤ ω m ≤ ω b2 , or halves at ω m = ω b1 as detailed in [8], depends mainly on the applied power source and the mechanical PMSM properties. If the current drawn from V DC is the limiting factor, the operation as shown in Fig.…”

“…Each of these coils is driven with a modular power electronics (PE) circuit, as will be explained in the following. The modular structure of the PE furthermore makes the system suitable for fault handling strategies in case of module failure, as presented in [8].…”

Green turbine: A high speed double turbine solution for sustainable energy harvesting from waste heat

“…This rectifier is required to convert the multi-phase AC generator voltage output to a dc voltage. This dc voltage allows the synchronization of the two turbines in a local dc distribution network proceeding the dc/ac converter that ensures that power can be supplied to the grid [20]. An important consideration in terms of rectifier selection is the fact that the turbine operates at a relatively fixed speed of 28,000 rpm, in order to ensure that it runs at its optimum efficiency.…”