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    Asymmetrical two-phase induction motor speed controlled with 4-leg voltage source inverter
    (2015-09-28)
    Kaenthong, K.
    ;
    Tipsuwanporn, V.
    ;
    Numsomran, A.
    ;
    Sawaengsinkasikit, W.
    This research is design and construct of Sine Pulse Width Modulation (SPWM) 4-leg voltage source inverter for controlling speed of asymmetrical two-phase induction motor. The Sine PWM switching signal is generated by ARM7 (Adu7024) microcontroller which is programmable and cheap, while having high frequency to generating switching signal. Two ICs No. IR2130 are used for motor driving part. The characteristics of output current signal are nearly closed to sinusoidal pattern resulting to high efficiency for motor control. In order to control the speed of induction motor, ratios of voltage to frequency (V/f) are controlled and constant torques are obtained by implementing technique of PI close-loop control.
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    Asymmetrical two-phase induction motor speed controlled with 3-leg voltage source inverter
    (2015-06-16)
    Kaenthong, K.
    ;
    Tipsuwanporn, V.
    ;
    Numsomran, A.
    ;
    Charean, A.
    This research is design and construct of Sine Pulse Width Modulation (SPWM) 3-leg voltage source inverter for controlling speed of asymmetrical two-phase induction motor. ICs No. IRF2130 are used for motor driving part. The characteristics of output current signal are nearly closed to sinusoidal pattern, so that low harmonics and high efficiency for motor control are obtained. The Sine PWM switching signal is generated by ARM7 (Adu7024) micro-controller which is programmable and cheap, while having high frequency to generating switching signal. In order to control the speed of induction motor, ratios of voltage to frequency (V/f) are controlled and constant torques are obtained by implementing technique of PI close-loop control.
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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 design technique of controlling 2 quadrant DC motor drive
    (2000-01-01)
    Piyarat, W.
    ;
    Paraken, Y.
    ;
    Tipsuwanporn, V.
    ;
    Sawangsinkasikit, W.
    ;
    Suesut, T.
    This paper proposes a control technique for DC motors which can determine the time response of speed, under both no load and on load conditions, in less than 2 seconds. It is operated by an 8-bit binary rate multiplier (BRM) under the PI control process. The motor under test is a two-quadrant type. The BRM 8-bit are generated from 8 principle waveforms by linear combination; finally 256 waves are attained. These waveforms are sent to control the motor with the required speed. It is known that BRM give low ripple-less than 1%-and, hence, less noise disturbance to the system. These BRM can be applied to reverse motor direction with fast response or sudden stop. Energy fed to the motor is also low but gives high efficiency.
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    New fine adjustment technique for heating process
    (2000-01-01)
    Tipsuwanporn, V.
    ;
    Jamjan, K.
    ;
    Piyarat, W.
    ;
    Suesut, T.
    ;
    Tarasantisukand, C.
    This paper proposes controlling of temperature in an oven by using Integral - Cycle Binary Rate Modulation (ICBRM method and ac line with frequency 50 Hz, Microcontroller MCS-51 controls Binary Rate Multiplier ( B M according to Proportional Integral controller (Po function . Discrete signals are used in the system modeled by using Ziegler Nichols principle for analyzing the stability before designing the system. This procedure makes it easy to investigate system response. The system is implemented by 8 bits digital circuit which gives 1024 patterns of ac signal for controlling the generation of energy for 3,000 watts thermal coil every 20 ms of each cycle. We divide scan time (Tsn) in to 4 intervals, 5 ms interval is selected to generate 256 patterns ICBM. Because of this method gives the ripple lower than 2% it generates less noise for system. Moreover, we can consider whole system from the time model of control procedure and ICBM algorithm40-200 OC with f I OC error in the I cubic meter oven.