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Vector control has improved the performance and energy efficiency in SPIM drives. However, high current and torque pulsations are produced by winding asymmetry of SPIM. This paper proposes a decoupling scheme to reduce the current and torque pulsations and improve the performance of vector control. A stator current observer is used to estimate the coupling signals, which are compensated by control...
This paper presents a sensorless vector control algorithm applied to a hermetic reciprocating compressor of a conventional refrigeration system. The single-phase induction motor of conventional on/off refrigerator is driven in variable speed to improve the thermal performance of the system. A sensorless technique is necessary because the conventional speed sensor cannot be employed in the hermetic...
This paper presents a closed-loop automatic method able to identify all electrical parameters of single phases induction machines. The system is based on Robust Model Reference Adaptive Controller that is applied at qd axes machine model. The identification procedure is based on currents measurements with standstill rotor and is divided in two times: in the first time, all parameters of main winding...
This paper presents a methodology for parameter identification of a Single-Phase Induction Machine (SPIM) of an air conditioning compressor. From the machine model two classical Recursive Least Square (RLS) algorithms are applied at qd axes based on current measurements with standstill rotor. The identification is achieved with standstill rotor due the fact that this methodology allow to be implemented...
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