Coupling Suspension Force Regulator Considering Time-Varying Characteristic for a Bearingless Switched Reluctance Motor

Yang, Fan; Yuan, Ye; Sun, Yanchao; Ding, Shihong; Yan, Libin; Ji, Wen

doi:10.1109/tie.2022.3201321

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…The representation of the AMB's control current ripple (∆i) under the two-level modulation strategy [9] is considered, as shown as follows:…”

Section: Principle Of Three-level Modulation In Amb Drive Circuitsmentioning

confidence: 99%

“…The drive circuit for Active MBs (AMBs) can adopt either a two-level modulation strategy or a three-level modulation strategy. The two-level modulation strategy primarily includes current hysteresis control [8,9], pulse width modulation (PWM) control [10,11], and sample-hold control [12]. In particular, current hysteresis control involves feeding the error between feedback and reference currents into a hysteresis comparator to generate PWM signals, thereby controlling the switching of the transistors.…”

Section: Introductionmentioning

confidence: 99%

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Active Magnetic Bearing Three-level Modulation Strategy Based on Mixed Logical Dynamical Model Prediction Controller

Zou,

Jiang,

Yang

et al. 2024

PIER C

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Active magnetic bearings feature advantages of frictionlessness, low loss, and high reliability, making them extensively utilized in fields such as flywheel energy storage, aerospace, and beyond. However, conventional modulation strategies applied to digital control systems suffer from control delays, reducing current control precision and resulting in increased current ripple. To address the aforementioned issues, firstly, the operating principle of the active magnetic bearing drive system is analyzed. Based on hybrid systems theory, a mix logical dynamic model of the drive system is established by introducing auxiliary logical variables and auxiliary continuous variables to achieve three-level modulation. Secondly, integrating model predictive control theory, the established model is utilized as a predictive model to forecast and compensate for control delays in controlling current. Finally, a cost function is established based on the error between predicted current and reference current, and optimal control signals are generated to achieve precise control of the active magnetic bearings. The simulation results demonstrate that under light load conditions, the modulation strategy proposed in this paper reduces current ripple by 49.94% compared to traditional modulation strategies. Under moderate load conditions, the proposed modulation strategy reduces current ripple by 49.96%, while under heavy load conditions, it reduces current ripple by 49.99%. This validates the effectiveness of the proposed modulation strategy in compensating for control delays while retaining the three-level modulation scheme.

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“…The representation of the AMB's control current ripple (∆i) under the two-level modulation strategy [9] is considered, as shown as follows:…”

Section: Principle Of Three-level Modulation In Amb Drive Circuitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active Magnetic Bearing Three-level Modulation Strategy Based on Mixed Logical Dynamical Model Prediction Controller

Zou,

Jiang,

Yang

et al. 2024

PIER C

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show abstract

“…In ref. [11], a suspension force model based on finite element simulation and the Maxwell tensor method is established, combined with a dynamic coupling observer and a coupled suspension force regulator to dynamically compensate the PID controller, which improves the stability and robustness of the system. In refs.…”

Section: Introductionmentioning

confidence: 99%

Suspension Flux Internal Model Control of Single-Winding Bearingless Flux-Switching Permanent Magnet Motor

Chen,

Yu,

Yang

et al. 2023

Actuators

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A suspension flux internal model control method is proposed to address the problem of the strong coupling of a single-winding bearingless flux-switching permanent magnet motor leading to a significant ripple of the rotor radial displacement. Firstly, based on air-gap magnetic field modulation theory, the stator flux equation considering rotor dynamic eccentricity is established to reveal the relationship between the eccentric rotor and the magnetic field. Secondly, according to the dynamic characteristics of the motor and the variation law of the air-gap magnetic field, the suspension-plane flux is substituted into the rotor dynamic model, and the suspension flux-dynamics internal model and corresponding output are constructed, respectively. Finally, a complete control strategy is established, and the rotor is stably suspended by PWM control. The simulation and experimental results show that the proposed method has better steady-state and dynamic performance than traditional PID control, and the maximum radial displacement ripples of the rotor are reduced by 53% and 50% in steady-state and dynamic operation.

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Direct Flux Control for Rotor Displacement of Single-Wingding Bearingless Flux-Switching Permanent Magnet Motor

Yao,

Zhengkai,

Yankun

2023

2023 26th International Conference on Electrical Machines and Systems (ICEMS)

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Coupling Suspension Force Regulator Considering Time-Varying Characteristic for a Bearingless Switched Reluctance Motor

Cited by 7 publications

References 23 publications

Active Magnetic Bearing Three-level Modulation Strategy Based on Mixed Logical Dynamical Model Prediction Controller

Active Magnetic Bearing Three-level Modulation Strategy Based on Mixed Logical Dynamical Model Prediction Controller

Suspension Flux Internal Model Control of Single-Winding Bearingless Flux-Switching Permanent Magnet Motor

Direct Flux Control for Rotor Displacement of Single-Wingding Bearingless Flux-Switching Permanent Magnet Motor

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