Multi-phase (more than three-phase) converters are required mainly for feeding variable speed multi-phase drive systems. This paper discusses one such solution by using direct ac-ac converter that can be used to supply a five-phase two-motor drive system. Matrix converter based two-motor drive system is presented for the first time in this paper. Two stator windings of two five-phase machines w...

Intisari — Kelor merupakan tanaman herbal yang bermanfaat bagi kesehatan. Cara konsumsinya kebanyakan dengan diseduh setelah sebelumnya daun kelor dikeringkan dan diolah menjadi serbuk. Penelitian ini dilakukan untuk meningkatkan efektivitas crusher serbuk mengaplikasikan teknologi elektronika. Motor AC satu fasa memanfaatkan sistem kontrol Proportional Integral Derivatif (PID) memperoleh kecep...

Matrix converter is an AC-AC direct power comprising of array bi-directional switches. It does not require intermediate DC-link and allows sinusoidal output waveforms with varying amplitudes frequencies. The configuration these switches decides the number inputs outputs matrix converter. This research uses a (DMC) as phase-changing device that can convert three-phase AC voltage into 5-phase vol...

Electrical parameter online measurement is used to monitor the working state of AC motor, to prevent the voltage being too low or the load being too large, to protect the motor safely. The paper mainly discusses the configuration and the principle based on Cortex-M3 for measuring the electrical parameter of alternating motor. The formula is given in the paper that calculates the AC signal harmo...

The trend to use inverter drives in industry is well established. It is desirable to monitor the condition of the motor/drive combination with the minimum of system intervention and at the same time retaining compatibility with the latest generation of AC PWM vector drives. This paper studies the effect of stator resistance asymmetry on the performance of the motor driven by a latest-generation...

While creating an industrial system which has an electric motor, the designers should to be think over not only control method but also motor type to create successful and efficiency system. If created system is an electric vehicle, designers have two powerful candidates as traction motor: Brushless AC (BLAC) or Brushless DC (BLDC) motors. In this study, a comparative performance investigation ...

BACKGROUND Electronic apex locators (EALs) are modern devices used to determine the working length during root canal preparation. The newest endodontic motors provide an integrated EAL with auto-stop function to prevent instrumentation beyond the predefined working length during rotary root canal preparation. The aim of this study was to compare the accuracy of the auto-stop function of the VDW...

The work presented in this paper proposes an approach to reduce the common mode voltage at the output of matrix converters when a direct torque control scheme is employed to drive a permanent magnet synchronous motor. A mathematical analysis of the common mode voltage at the output of matrix converters is firstly carried out which is then corroborated by simulation results. Based on this analys...