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    Programmable multi-frequency SPIM drive for suitable energy
    (2001-12-01)
    Tipsuwanporn, Vittaya
    ;
    Cheevasuvit, Fusak
    ;
    Ngamwiwit, Jongkol
    ;
    Sawaengsinkasikit, Winyu
    ;
    Komine, Noriyuki
    This paper had been focused on developing a methodology for control speed of a Single Phase Induction Motor (SPIM) by using a Binary Rate Multipliers (BRM) technique and a programmable multi-frequency technique(40-80Hz) in order to control suitable energy supplying to motor. Voltage and current are known then power can be calculated by using Vector Space method. The results (torque and speed) are feed back to two Proportional - Integral (PI) controllers in order to select BRM patterns that can be generated up to 256 forms. From these procedures that are speed control principle, and time response of returning to normal situation at both loading and no load is less than 1.0 second. Furthermore, power factor at no load and full load is also increased. Thus, higher efficiency is achieved.
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    New BRM technique for space vector decomposition reactive power of SPIM
    (2000-01-01)
    Tipsuwanporn, V.
    ;
    Charean, A.
    ;
    Piyarat, W.
    ;
    Sum-Im, T.
    ;
    Chochai, N.
    This paper presents the methodology of Single Phase Induction Motor (SPIM) speed controlling by new Binary Rate Multipliers (BRM) technique that gives rise to suitable energy supply to motor at any instant. Knowing the voltage and current, power is calculated by vector space method. The result is feedback to Proportional - Integral (PI) controller for processing by means of BRM-which gives the patterns up to 256forms. It shows fast time response of returning to normal state, both loading and no load, not exceed 1.5 seconds. The superiority of this technique is that, both apparent and reactive power decrease while running at no load and full load power factor increase up to 0.444 and 0.633 respectively. Thus, higher efficiency is achieved.
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    Quick torque controlled SPIM using PID controller based on PLL technique
    (2000-01-01)
    Tipsuwanporn, V.
    ;
    Charean, A.
    ;
    Piyarat, W.
    ;
    Kittisiam, T.
    ;
    Thepsatorn, P.
    This paper proposes the PERM technique by using the phase locked loop (PLL) and binary rate multiplier (BRM) techniques combined together to control the speed of a single-phase induction motor (SPIM). The system simulation is based on utilizing a discrete signal and the root locus technique to analyze the stability of the system before design. It is an easy method to determine the result response of the system. The PERM can adjust the circle criterion in the digital loop by considering a K ratio value between 0.179 to 1.85. This PERM technique can also control response signals back to steady state in less than 1.7 second during variable load or no load.