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This paper mainly discusses several key technologies in high performance BLDCM. A brief summarization on present studies in the field of aviation and aerospace for the enhancement of reliability, efficiency and variable speed capability is given, and its research direction in the future also is looked ahead.
A novel control method is presented for improving the reliability of transformerless cascade STATCOMs operating under various faults. A modified H bridge circuit is proposed, and it could be totally bypassed under various faults while the STATCOM keep working. During the fault transient, by controlling the phase of a STATCOMpsilas output voltage, the DC capacitors could be charged or discharged to...
There is an industry need for suitable methods to qualify medium-and high-voltage stator insulation systems for inverter duty applications. Technical Specification (TS) IEC 60034-18-42 is being written to address the unique requirements of form-wound micaceous systems to withstand inverter pulses, characterized by elevated voltage, fast rise times, and high frequency impulse repetition rates. These...
A novel synchronizing technique is applied to a ring bus configured power system, with multiple solid-state inverters, to allow the bus-tie breaker to be closed at any time. After paralleling, load sharing is magnetically controlled without electronic circuitry or software control. Compared to the traditional one-at-a-time synchronization process, this approach significantly shortens the synchronization...
A study of the commutating failure of a single-phase AC line-voltage-commutated inverter, is carried out with the help of a simulation method, combined with the steady-state operating diagram. A new aspect to explain this failure is presented.<<ETX>>
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