Decentralized Linear Permanent Magnet Synchronous Motor Control Using Harmonic Injection SPWM

2012 ◽  
Vol 562-564 ◽  
pp. 1479-1482
Author(s):  
Zi Li Tang ◽  
Shuang Hui Hao ◽  
Ming Hui Hao
Keyword(s):  
Pulse Width Modulation ◽  
Permanent Magnet Synchronous Motor ◽  
Current Control ◽  
Point Of View ◽  
Direction Error ◽  
Voltage Vector ◽  
Harmonic Injection ◽  
Current Cycle ◽  
Utilization Ratio ◽  
Bus Voltage

This paper proposes a novel SPWM with harmonic injection method to improve the utilization ratio of bus voltage of decentralized LPMSM. In a traditional SPWM, usually, the phase voltage order is restricted independently, which results in that the bus voltage can not be used efficiently, produces voltage vector direction error, and lowers response frequency of current cycle. To solve this problem, the proposed method adopts pulse width modulation control technology with active harmonic injection to enhance the utilization ratio of bus voltage, and the theoretical analysis has been conducted from the potential difference point of view. The final results show that this method can enhance the utilization ratio of bus voltage of the high power LPMSM greatly, and improve current control, under the premise that voltage vector accuracy is not affected. This result confirm the validity of the proposed method.

scholarly journals Current Regulator Design for Dual Y Shift 30 Degrees Permanent Magnet Synchronous Motor

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 777
Author(s):  
Zhihong Wu ◽  
Weisong Gu ◽  
Yuan Zhu ◽  
Ke Lu ◽  
Li Chen ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Pulse Width Modulation ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Current Control ◽  
Parameter Uncertainties ◽  
Control Loops ◽  
Decomposition Space ◽  
Harmonic Currents

This paper gives the current regulator design for a dual Y shift 30 degrees permanent magnet synchronous motor (DT_PMSM) based on the vector space decomposition (VSD). Current regulator design in α-β subspace is insufficient and designing additional controllers in x-y subspace is necessary to eliminate the harmonic currents due to the nonlinear characteristics of the inverter. A sliding mode controller based on an internal model is proposed in α-β subspace, which is robust to the parameter uncertainties and disturbances in current control loops. In order to eliminate the harmonic currents in x-y subspace, a resonant controller is employed based on a new synchronous rotating matrix. Three-phase decomposition space vector pulse width modulation (SVPWM) technique is illustrated for the purpose of synthesizing the voltage vectors in both subspaces simultaneously. The feasibility and efficiency of the suggested current regulator design are validated by a set of experimental results.

scholarly journals Vector Weighting Approach and Vector Space Decoupling Transform in a Novel SVPWM Algorithm for Six-Phase Voltage Source Inverter

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Peng Wu ◽  
Lei Yuan ◽  
Zhen Zuo ◽  
Junyu Wei
Keyword(s):  
Vector Space ◽  
Pulse Width Modulation ◽  
Permanent Magnet Synchronous Motor ◽  
Voltage Source ◽  
Phase Voltage ◽  
Three Phase ◽  
Action Time ◽  
Previous Algorithm ◽  
Bus Voltage ◽  
Smooth Transitions

For six-phase permanent-magnet synchronous motor (PMSM) which has two sets of Y-connected three-phase windings spatially phase shifted by 30 electrical degrees, to increase the utilization ratio of the DC bus voltage, a novel space vector pulse width modulation (SVPWM) algorithm in full modulation range capability based on vector weighted method is proposed in this paper. The basic vector action time of SVPWM method is derived in detail, employing vector space decomposition transformation approach. Compared with the previous algorithm, this strategy is able to overcome the inherent shortcomings of the four-vector SVPWM, and it achieves smooth transitions from linear to overmodulation region. Simulation and experimental analyses demonstrate the effectiveness and feasibility of the proposed strategy.

Research on the Method of Variable-Frequency Hysteresis SVPWM Current Control for Three-Phase PWM Rectifier

2014 ◽  
Vol 678 ◽  
pp. 392-398 ◽  
Author(s):  
Xu Chen ◽  
Shou Qi Wei
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Current Control ◽  
Voltage Source ◽  
Variable Frequency ◽  
Pwm Rectifier ◽  
Hysteresis Current Control ◽  
Voltage Vector ◽  
Three Phase ◽  
Space Voltage Vector

Aiming at the shortcomings of the method of conventional hysteresis current control for three-phase PWM rectifier, this paper proposes a new method, which combines Variable-frequency hysteresis current control with Space Vector Pulse-width Modulation (SVPWM) strategy. With this method, the error current can be limited in a given hysteresis loop by switching the space voltage vector of the voltage source PWM rectifier (VSR) in real time. And it can get a faster response for the current, while the frequency of the switches can be reduced. So, this method can obtain a high quality for the current control of PWM rectifier.

scholarly journals Application of Perovskite Layer to Rotor for Enhanced Stator-Rotor Capacitance for PMSM Shaft Voltage Reduction

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5762
Author(s):  
Muhammad Aqil ◽  
Jun-Hyuk Im ◽  
Jin Hur
Keyword(s):  
Pulse Width Modulation ◽  
Permanent Magnet Synchronous Motor ◽  
Voltage Divider ◽  
Electric Discharge Machining ◽  
Perovskite Layer ◽  
Voltage Ratio ◽  
Common Mode Voltage ◽  
Three Phase ◽  
Switching Action ◽  
Bus Voltage

Adjustable speed drives use Pulse Width Modulation (PWM) to switch DC-bus voltage for the synthesis of three-phase voltages to provide power to the permanent magnet synchronous motor (PMSM). This switching action produces very short rise and fall times and Common Mode Voltage (CMV) in the motor winding, exciting the parasitic capacitances inherent to the motor geometry. These parasitic capacitances give rise to shaft voltage due to a voltage divider action. Therefore, in this paper, first, motor parasitic capacitances and voltage divider action is explained. Second, the Barium Titanate (BTO) layer is coated onto the rotor to enhance stator-to-rotor compound capacitance and a simulation is performed showing the dependence of the shaft voltage on the permittivity of the perovskite (BTO) layer. The rotor BTO layer reduces the bearing voltage ratio as well. Third, experimental results are presented showing effectiveness of the application of the BTO layer to rotor and reduction of shaft voltage of the motor in anticipation to mitigate the damaging electric discharge machining (EDM) bearing currents. Likewise, the experiment shows that the magnetic design of the motor is not affected by the BTO layer to rotor.

The Research of Permanent Magnet Synchronous Motor Predictive Current Control Algorithm

2013 ◽  
Vol 397-400 ◽  
pp. 1393-1397
Author(s):  
Lian Dong Lin ◽  
Pei Jia Ren
Keyword(s):  
Permanent Magnet ◽  
Control Algorithm ◽  
Pulse Width Modulation ◽  
Dynamic Performance ◽  
Permanent Magnet Synchronous Motor ◽  
Transient State ◽  
Synchronous Motor ◽  
Current Control ◽  
Simulation And Experiment ◽  
Current Sampling

To enhance the current regulation capability for PMSM when transient state, which caused by the existence of numerical delay such as current sampling and Pulse-Width Modulation (PWM) duty-cycle updating, this paper proposed a predictive current control algorithm for permanent magnet synchronous motor which based on deadbeat control. The numerical delays in conventional FOC system are eliminated in theory. Simulation and experiment results show that the PMSM (Permanent Magnet Synchronous Motor) current predictive control scheme improves both the dynamic performance and steady-state precision of the PMSM control system.

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