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Discontinuous SVPWM-Based Speed Control of Unsymmetrical Two-Phase Induction Motor Using a Multifunctional Drive System
(2026-01-01)
Promkhun, Watcharin
;
Kinnares, Vijit
;
Kongsuk, Prayad
;
Piyarat, Wekin
;
Dangeam, Sirichai
This paper proposes a multifunctional drive system for closed loop speed control of an unsymmetrical two-phase induction motor. A two-phase three-leg voltage source inverter providing constant Volts/Hz and slip regulation control for a machine end converter employs time-based discontinuous space vector pulse width modulation in order to reduce switching loss. A hysteresis current control technique of a single-phase full bridge regenerative PWM rectifier as a front-end converter utilizes source current as a feedback signal instead of converter current. The front-end converter offers multi-functionality of not only bidirectional real power flow but also acting as an active power filter responsible for reactive power and harmonic compensations for various types of nonlinear loads in conjunction with the drive system. As a result, the grid current waveform is nearly sinusoidal and the grid power factor is near unity power factor. With the proposed discontinuous unbalanced space vector pulse width modulation (DUSVPWM) method, the two-phase three-leg inverter provides optimum unbalanced two-phase voltages with orthogonal displacement appropriate for the unsymmetrical two-phase induction motor which is able to improve the converter efficiency. The overall control system is implemented on a low-cost DSP board. The validity of the proposed system is verified by both simulation and experimental results. The capability of the drive under various conditions is satisfactory.
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Implementation of a drive system for dual single-phase induction motor using a five-leg inverter with carrier-based space vector PWM technique
(2021-01-01)
Dangeam, Sirichai
;
Kinnares, Vijit
This paper presents the implementation of a drive system of a dual single-phase induction motor system with independently closed loop speed control using a five-leg voltage source inverter. Simple closed-loop speed V/f scalar control method and carrier-based space vector PWM (SVPWM) are implemented on dSPACE DS1104. The details of dSPACE configuration and programming are fully given. The experimental results show that the implemented system is able to independently control to keep speed constant for each motor under various operating conditions.
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Modulating functions of space vector PWM for five-leg inverter fed two single-phase induction motors
(2020-03-01)
Dangeam, Sirichai
;
Kinnares, Vijit
This paper proposes modulating functions of a space vector pulse width modulation (SVPWM) technique based on modified sectors for a five-leg voltage source inverter (VSI) fed dual single-phase induction motor system. The modified sectors are used to simplify the modulating functions in a general form. The modulating functions are fully derived, described and implemented on a DS1104 dSPACE controller. The obtained SVPWM signals are applied to a five-leg VSI for driving the two single-phase induction motors to demonstrate its feasibility in motor drive applications. The calculated and measured modulating signal waveforms of the proposed SVPWM are in good agreement. Experimental waveforms of the motor voltages and currents at different operating frequencies are demonstrated and found to be satisfactory.
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Two single-phase induction motor drives using a five-leg voltage source inverter
(2016-01-18)
Dangeam, Sirichai
;
Kinnares, Vijit
This paper presents the implementation of 5-leg voltage source inverter fed independently two single-phase induction motors with different speed. Space vector pulse width modulation is used for the five-leg VSI Closed-loop speed V/f scalar control is employed for those motors. The experimental results show that the speed for each motor can be independently control. Besides that, the advantages of the 5-leg inverter can be shared the capacitor and dc bus together, reduced the cost by decreasing the numbers of power switch and driver circuits and also reduced the switching loss.
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A direct torque control for three-leg voltage source inverter fed asymmetrical single-phase induction motor
(2016-01-18)
Dangeam, Sirichai
;
Kinnares, Vijit
This paper presents the implementation of 5-leg voltage source inverter fed independently two single-phase induction motors with different speed. Space vector pulse width modulation is used for the five-leg VSI Closed-loop speed V/f scalar control is employed for those motors. The experimental results show that the speed for each motor can be independently control. Besides that, the advantages of the 5-leg inverter can be shared the capacitor and dc bus together, reduced the cost by decreasing the numbers of power switch and driver circuits and also reduced the switching loss.
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Five-leg voltage source inverter for driving two single-phase induction motors
(2014-01-01)
Dangeam, Sirichai
;
Kinnares, Vijit
This paper presents the simulation of a five-leg voltage source inverter for driving independently two single-phase induction motors with different speeds. Carrier-based space vector pulse width modulation is used for the five-leg VSI. V/f scalar control is employed for those motors. The simulation results show that the speed for each motor can be independently control. Besides that, the advantages of the five-leg inverter are shared capacitor and dc bus together, reduced cost due to a decrease in power switch count and driver circuits and also switching losses.

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