Abstract
In traditional motor drive system, large volume electrolytic capacitors are utilized to buffer energy and stabilize the dc-link voltage. However, these capacitors affect the reliability of the drives and narrow the conduction angle of diode-rectifier. As a result, the grid side current is distorted and the power factor is deteriorated. In order to settle these issues, small dc-link capacitors can replace the electrolytic capacitors. In this paper, a motor torque control method with dc-link voltage feed-forward compensation for an interior permanent magnet synchronous motor (IPMSM) drive system is proposed. Hence, an integration multi-resonant ( I-MR ) controller is established to regulate the motor torque to obtain high input power factor and low grid current harmonics. In addition, a voltage feed-forward compensation is used to diminish the error of motor torque control. The effectiveness of the proposed method is verified through simulation and experiments. Results indicate that the input power factor can reach about 99.4% and the grid current harmonics are considerably lower than the requirement of EN-61000-3-2 standard.
Highlights
Nowadays, interior permanent magnet synchronous motors (IPMSMs) have been widely used in industrial and white home applications due to their superior efficiency, power density and torque-to-inertia ratio [1]–[3]
In order to obtain high grid power factor and suppress the input current harmonics for small capacitor IPMSM drive system, this paper proposes a motor torque control method including torque control loop based on integration multi-resonant (I-multi resonant (MR)) controller and voltage feed -forward compensation strategy
EXPERIMENTAL RESULTS To further verify the performance of the proposed control methods, the motor torque control platform of IPMSM based on I-MR controller was constructed
Summary
Interior permanent magnet synchronous motors (IPMSMs) have been widely used in industrial and white home applications due to their superior efficiency, power density and torque-to-inertia ratio [1]–[3]. It replaced the power control to generate the q-axis current reference In this torque control system, the integration resonant (IR) [21], [22] and integration quasi-resonant (IQR) [23] controller were proposed, which consists of an integrator and a sinusoidal tracking controller. It is easy to design the controller parameters to achieve a high power factor by the linearization of the control system These control methods only focused on the input current fundamental components. In order to obtain high grid power factor and suppress the input current harmonics for small capacitor IPMSM drive system, this paper proposes a motor torque control method including torque control loop based on integration multi-resonant (I-MR) controller and voltage feed -forward compensation strategy. The effectiveness of the proposed control method is verified by simulations and experiments
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