The conventional SVPWM algorithm gives good performance for control of induction motor drive, but it produces more acoustical noise resulting in increased total harmonics distortion. The random pulse width modulation (RPWM) techniques has become an established means for mitigation of undesirable side effects in PWM converters, the use of voltage source inverters in adjustable speed ac drives in...

Untuk memberikan suplai air pada titik-titik penggunaan dibutuhkan suatu sistem pemipaan dan pompa yang handal efisien, namun dalam banyak aplikasi, sering kali tidak dapat beroperasi sesuai dengan titik kerja performa terbaiknya (best efficiency point) . Oleh karena itu, penulis melakukan eksperimen 3 buah paralel tujuan untuk mendapatkan parameter setting konfigurasi operasional tepat. Metode...

Dynamic Analysis of an axially moving cable with time dependent tension and velocity isstudied in this paper. Tension force and the moving speed are assumed to be harmonic.It is found that there exists a specific value of speed in which natural frequency of the system approacheszero. This specific speed for such a critical condition is called critical speed and it will be proved thatincreasing ...

Induction motors are the most commonly used in the traction industries and electric vehicles, due to their low primary cost, low maintenance costs, and good performance. Speed identification is needed for the induction motor drives. However, using of speed sensors in the induction motor drives is associated with problems such as, extra cost, reduced reliability, added mounting space, etc.. Ther...

The article presented two proposals for construction of a flexible element with variable stiffness, in which construction is limited, or is it completely eliminated the mechanical elastic member such as spring. Their properties vary in the extent applicable member stiffness and speed of reaction to contact with an obstacle. By limiting, or eliminating the mechanical elastic member can be achiev...