Torque Ripple Minimization in Six-Step PMSM Drives via Variable and Fast DC Bus Dynamics

Yang, Hung-Yen Ou; Lorenz, Robert D.

doi:10.1109/tia.2019.2910450

Cited by 18 publications

(4 citation statements)

References 19 publications

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“…Considering the diode conduction ripple, the conduction time t xA in ( 9) is decreased as the increase of EMF voltage EA. Under this effect, the diode conduction ripple is inversely proportional to the motor speed, as also reported in [20]. Fig.…”

Section: Torque Ripple At High Speedsupporting

confidence: 66%

Torque Ripple Reduction for BLDC Permanent Magnet Motor Drive Using DC-Link Voltage and Current Modulation

et al. 2022

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This paper proposes a torque ripple reduction for brushless DC (BLDC) permanent magnetic (PM) motor drive based on the DC-link voltage pulse amplitude modulation (PAM). The proposed method improves torque ripple drawback for BLDC drives at low speed. BLDC drives have the better inverter efficiency and requires low position sensing resolution. However, both freewheeling current during diode conduction and discontinuous motor phase current cause high torque ripples. In this paper, a frontend DC converter is added to improve BLDC torque ripples. Although the integration of DC converter and BLDC drive has been reported, the DC voltage regulation for the BLDC torque ripple compensation is this paper novelty. On the basis, the DC bus is modulated during diode conduction to manipulate the DC current dynamically every BLDC commutation period. In addition considering the discontinuous sixstep commutation, the DC current is also regulated with the 6th-order spatial harmonic to minimize the commutation reflected torque ripple. The proposed torque ripple compensation of BLDC drive is verified by simulation for different PM motor types. According to experimental results, around 40% torque ripple reduction on a PM motor is demonstrated using the proposed BLDC drive with DC voltage modulation.

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Section: Torque Ripple At High Speedsupporting

confidence: 66%

Torque Ripple Reduction for BLDC Permanent Magnet Motor Drive Using DC-Link Voltage and Current Modulation

et al. 2022

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“…Considering that the torque performance of PMSM is susceptible to nonlinear distortion of VSI in low modulation area of PWM, a DC-DC converter is usually used to provide DC-link voltage adapting to the operating point of PMSM, especially for motor drives with a wide speed range [31,34]. Based on similar topologies, we lock the modulation ratio ρ = 1 and achieve amplitude control with the maximum utilization for DC-link voltage to improve the control accuracy in the proposed method.…”

Section: Discussionmentioning

confidence: 99%

DC-Link Current Control with Inverter Nonlinearity Compensation for Permanent Magnet Synchronous Motor Drives

Wang¹,

Wu²,

Chu³

2020

Energies

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For permanent magnet synchronous motors (PMSMs) supplied with a voltage source inverter, current control strategies are commonly implemented under the synchronously rotating reference frame. In order to simplify the system structure, three-phase currents can be measured with a single DC-link current sensor using the phase current reconstruction technique. However, it still needs to follow the conventional AC current control approach. In this paper, a DC-link current control method for PMSMs is proposed to further simplify the control system. The problem of phase current control was separated into the problems of amplitude control and phase control. Then, amplitude control was achieved using a closed-loop controller directly tracking the DC-link current; while phase control was achieved by AC-side pulse width modulation (PWM) following the phase angle of back electromotive force. The compensation for nonlinear distortion of the inverter was taken into account during the control process. Finally, the proposed method realized three-phase current control with a single current sensor and controller, and achieved the purpose of electromagnetic torque control. Experimental results demonstrate the effectiveness of the proposed method.

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“…The voltage limit value (Vlimit) of the motor is generally determined by the input voltage and the control method. There are typically three control methods: space vector pulse width modulation (SVPWM), sinusoidal pulse width modulation (SPWM) and the 6-step control method [29]- [31]. According to control methods (SVPWM, SPWM and 6-step), the voltage limit values with a 12 V input voltage are shown in TABLE VI.…”

Section: B Comparison Of Motor Types For 12 V Bsg Systemmentioning

confidence: 99%

Belt-Driven Integrated Starter and Generator Using Planetary Gears for Micro Hybrid Electric Vehicles

et al. 2021

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This paper presents a 12 V mechanical torque converting belt-driven integrated starter and generator (BSG) system without a DC-DC converter. A micro hybrid electric vehicle (micro HEV) typically uses a 12 V battery with a 12/48 V bidirectional DC-DC converter to satisfy its high starting torque and wide operating speed for generating the required power. In contrast, the proposed BSG consists of a wound field synchronous machine (WFSM), planetary gears, and a belt-type pulley, which does not require an additional bidirectional DC-DC converter. Owing to the mechanical torque converter, the proposed BSG system produces a high starting torque in starter-mode with a 12:1 gear ratio, and it operates in generator-mode with a 1:2 gear ratio to satisfy the required target specifications. To verify that the proposed BSG system meets the required target design specifications, simulations using MATLAB/Simulink 2018b and ANSYS electromagnetic 19.0 were performed. Additionally, the experimental results verify that this proposed BSG meets the required starter and generator modes specifications. Based on an analysis of the cost and vehicle environment conditions, the proposed BSG provides an efficient solution to the high cost issue incurred by a micro-HEV that requires a DC-DC converter system.

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Torque Ripple Minimization in Six-Step PMSM Drives via Variable and Fast DC Bus Dynamics

Cited by 18 publications

References 19 publications

Torque Ripple Reduction for BLDC Permanent Magnet Motor Drive Using DC-Link Voltage and Current Modulation

Torque Ripple Reduction for BLDC Permanent Magnet Motor Drive Using DC-Link Voltage and Current Modulation

DC-Link Current Control with Inverter Nonlinearity Compensation for Permanent Magnet Synchronous Motor Drives

Belt-Driven Integrated Starter and Generator Using Planetary Gears for Micro Hybrid Electric Vehicles

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