The field-weakening scheme is generally adopted for traction motors to achieve a wider speed range where the common proportional and integration compensator needed regulate flux-producing current. However, regulator performance deteriorates due dc-link voltage disturbances motor parameter nonlinearities in different regions. To solve this issue, model predictive control (MPC) based algorithm proposed electric vehicle using low-voltage induction motor. augmented prediction state relationship...

The port harmonic features of the single-phase single-stage high-frequency isolated dc-ac converter is not analyzed so far and corresponding theoretical basis for improving current quality still a research gap. In this paper, linear model in frequency domain originally derived based on combined state space extended description function modeling technique. systematic process accuracy verified by simulation results. Combined with analysis, coupling characteristics between ac side dc are...

In order to further improve the integration of ac-grid-connected hybrid energy storage system, a novel three-phase single-stage three-port high-frequency isolated dc–ac converter is proposed in this article. This connects two dc ports and one ac port via three-winding transformer, saving ac-side port. The uses matrix dc-side use interleaved parallel boost converter, which has advantages low current ripple wide voltage range. achieves galvanic isolation bidirectional power conversion with...

The high fault-tolerance ability is one important application characteristic of multiphase motors. At present, researches on fault-tolerant control motors are focused open-phase faults. When an fault occurs for the dual three-phase machine, α –β subspace and z 1–z 2 currents no longer decoupled, so mathematical model with open phases should be set up. In this study, permanent-magnet synchronous motor (PMSM) phase up by vector space decomposition modelling method, two optimal current modes...

This article proposes an improved line-constrained explicit model predictive control (EMPC) method for interior permanent magnet synchronous motors by utilizing the constraint processing capability of EMPC. Despite substantial advantages that EMPC provides motor drives, its memory occupancy and complex weight factor calculation make it limited in tackling only small-scale issues. To address these challenges, incorporates a variable converts area constraints conventional strategy into line...

Pulse width modulation (PWM) technique brings harsh acoustic noise in motor drive system. Thus, synchronous random switching frequency (SRSFM) based on carrier phase shift for paralleled three-phase voltage source inverters is proposed this study to eliminate the PWM noise. The SRSFM able remove high-frequency more effectively than conventional PWM; it not only completely eliminates nearby odd-order but also reduces vibration around even-order depending variation range. Furthermore, simple...

Existing parameter identification methods often neglect the AC losses effect on impedance parameters and exhibit incomplete compensation for low-current-region voltage source inverter (VSI) nonlinearity. As a result, failures or inaccuracies occur in low-impedance motors. To address these challenges, this paper presents an impedance-based self-learning method dual three-phase permanent magnet synchronous motors (DTP-PMSMs). The proposed utilizes hybrid current injection sequence that...

A dual-plane SVPWM strategy for dual three-phase permanent magnet synchronous motor (DT-PMSM) is proposed in this paper. Based on the vector space decoupling (VSD) model, virtual vectors are constructed α-β and z <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> -z xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> planes by synthesis respectively. The amplitudes of zero other plane, so independent control reference voltage can be achieved...

Dual-redundancy permanent magnet synchronous motor (DR-PMSM) is applicable to aviation for its reliability and high power density. However, the DR-PMSM without isolation may lose control while adopting traditional two-individual current control. The article studied decoupling of with 0° phase shift, which lacking in research. proposed a model based on virtual loops designed loop regulators eliminate coupling influence. Based model, influence analyzed. Then, revealed that rank-deficient...

This paper presents an improved position-sensorless field-oriented control strategy for a surface-mount permanent magnet synchronous motor (PMSM). In this algorithm, high-pass filter (HPF) has been applied to the rotor flux estimation solve DC drift or offset problem caused by integration part. The position and speed signal extraction is achieved mean of phase-lock loop (PLL) as well phase compensation unit. explains design details adopted methodology. On basis method, PMSM field orientation...

This study presents a novel overmodulation strategy for six-phase voltage source inverter (VSI)-fed dual three-phase permanent-magnet synchronous motor. The proposed can achieve minimum harmonic injection in the region. Four-vector space vector pulse width modulation (SVPWM) renders mathematic foundations this given method. However, classical four-vector SVPWM used VSI has asymmetrical waveform, which makes it difficult hardware implementation. In paper, algorithms both linear and regions...

There is only current closed loop control in the α-β subspace which related to electromechanical energy conversion two-dimension for dual three-phase PMSM, due effect of voltage source inverter (VSI) dead-time and other nonlinear factors, phase contain lower order harmonics, harmonic impedance z1-z2 comprised stator resistance leakage inductance, low level can induce very high currents. The currents be suppressed by proposed four-dimension vector scheme this paper. decomposition SVPWM...

In this paper, the decoupling matrix in a five-phase permanent magnet synchronous motor (FPMSM) is rebuilt and changed, according to different open-phase conditions, which complicate switch control algorithm. This paper proposes unified fault-tolerant strategy with transformation matrix, effectively suppressing torque ripple for several faults. The current algorithms faults are demonstrated; ripple, especially, analyzed third harmonic magnetomotive force (MMF). law expressed two adjustable...

Cooperative triple-phase-shift (CTPS) control for dual active bridge DC-DC converter has the advantages of eliminating dual-DC sides flow back currents, minimizing root mean square value inductor current and greatly improves characteristics. In this paper, effect transient actions on CTPS is originally analyzed corresponding solution based proposed. When sudden change three phase shifts occurs, switching moments signals power switches are recalculated considering old new values together to...

The isolated direct ac–ac converter has the advantages of high power density and long life time, however, suffering from cost relatively low efficiency. In this article, a three-level resonant is proposed; thus, voltage stress switches reduces to half input amplitude, as result, rating reduced. A hybrid modulation strategy for proposed realize conversion reduce switching loss. Furthermore, in order obtain good control output based on converter, closed-loop combining linear controller with...

In the LCC-LCC wireless power transfer system (WPT) with secondary buck converter, overvoltage and overcurrent faults occur when converter is shut down suddenly. order to ensure safety, this issue analyzed at transient level dual-side indirect closed-loop control strategy proposed achieve of terminal voltage dc bus voltage. The under by primary inverter current conclusion proven in level. Under strategy, two-stage WPT forms a cascade there instability problem. integrated design criteria...

In typical traction Electric Vehicle applications, the DC-link voltage varies during transient accelerating and decelerating process in field-weakening region. The calculated reference voltages of current PI regulators tend to be larger than one steady state, which will result undesired flux-producing oscillations. This further deteriorates electromagnetic torque performance. To solve this issue, a model predictive control (MPC) based algorithm is proposed for EV used low-voltage induction...

In order to reduce the noise and vibration of FPMSM produced by PWM, a hybrid random SVPWM (HR-SVPWM) method based on enhance NFV-SVPWM with full modulation ratio Five phase voltage source inverter is proposed in this paper. The can solve limitation traditional NFV-SVPWM. HR-SVPWM combined RZ-SVPWM RP-SVPWM. And an easy implementation its principle. harmonics modulated be suppressed balanced effectively. correctness suppression high frequency spectrum are verified simulation. Finally,...

Six-phase PMSM with double Y 30 degree shift connection can continue to run under open-circuit fault condition. Based on hysteresis control expression of phase current or PI regulator incomplete decoupling mathematical model, the effect is not as satisfied normal condition, resulting in electromagnetic torque ripple. According feature, Model Predictive Control (MPC) applied control. The predictive model established from six-phase PMSM, which rolling optimization calculation done. output...

For six-phase permanent magnet synchronous generator (PMSG) which has two sets of Y-connected three-phase windings spatially phase shifted by 30 electrical degrees, an improved four vectors synthesis method was proposed based on analysis the largest adjacent modulation strategy, PWM output waveforms were centralized according to voltage RMS value invariable, injecting harmonics, it realized non-sinusoidal modulation. Simulation and experiment validated can modulated in area, reduced...

To solve the problems of complex operation and poor real-time in traditional SVPWM control algorithm, a novel equivalent algorithm based on carrier modulation for five-phase inverter is proposed. Coming from idea SPWM symmetrical regular sampling which modulated wave compares with carrier, switch triggering time can be directly calculated by using instantaneous value reference voltage. It doesn't need coordinate transformations trigonometric calculations, calculation accuracy speed improved...