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Yihua Hu
University of Liverpool
EngineeringControl engineeringVoltageElectronic engineeringControl theory
172Publications
23H-index
1,742Citations
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Publications 192
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Transient dc bias current due to the voltage-second imbalance of isolated bidirectional dual-active-bridge (DAB) converters for the disturbance in line or load may result in the transformer saturation and oscillations in both sides dc currents. This paper focuses on the transient dc bias current elimination by using an improved triple-phase-shift (ITPS) control for DAB converters. The inductor peak current stress optimization is adopted in the proposed ITPS to determine the steady-state phase-sh...
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#1Chao GongH-Index: 1
#2Yihua HuH-Index: 23
Last. Jinqiu Gao (NPU: Northwestern Polytechnical University)H-Index: 1
view all 6 authors...
When electric vehicles encounter emergency, the DC-bus capacitor voltage in the motor drive system needs to be reduced as quickly as possible to prevent the passengers from secondary electrical injury. For the purpose of compactness and low cost, a novel discharge scheme by using the machine windings has come forth. Yet, the relevant researches are incomprehensive without considering the standstill cases and sensor fault issues. This paper proposes a position sensor fault-tolerant winding-based ...
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This article proposes a simple branch comprised of a coupled inductor, a switch, a diode, and an additional input/output port, which can be employed to substitute the original output/input inductor in two-port dc–dc converters to conveniently derive integrated dual-input/output converters. By connecting the dotted terminals of primary and secondary windings of the coupled inductor together and setting the turns ratio as 1:1, its magnetizing inductor functions totally the same as the original ind...
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#1Zheng WangH-Index: 11
#1Zheng WangH-Index: 20
Last. Yihua HuH-Index: 23
view all 6 authors...
In this article, the control scheme and switching strategies are studied for a dual three-phase hybrid permanent-magnet alternating current (PMAC) motor drive. Both high-coercive-force permanent magnets NdFeB and low-coercive-force permanent magnets AlNiCo are mounted on the rotor in order to provide high torque density and adjustable flux for electrical machine. The asymmetric dual three-phase windings can share the large currents for magnetization or demagnetization of AlNiCo, while offering l...
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#1Jiadong LuH-Index: 3
#2Yihua HuH-Index: 23
Last. Zheng WangH-Index: 11
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The conventional phase current reconstruction strategies utilize a dc bus current sensor to reproduce the three-phase currents during phase current sensor faults. However, no current sensor is guaranteed to be healthy in an actual drive. It means that the only survived current sensor may not be accidentally located at the dc bus side, and it can also be at the phase side. In addition, previous studies focus on a particular inverter topology for current reconstruction, whose fault-tolerant capabi...
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#1Jiadong LuH-Index: 3
#2Yihua HuH-Index: 23
Last. Huiqing WenH-Index: 15
view all 5 authors...
The precision of position estimation is highly dependent on the accuracy of multiple current sensors, whereas the conventional error calibration strategies for current sensor accuracy uncertainty (SAU) problem have limitations regarding the position sensorless controlled drives. In order to solve this thorny problem, this article proposes a mutual calibration strategy for the multiple current sensors in an interior permanent magnet synchronous motor (IPMSM) drive. The proposed current sensor err...
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#1Chao Gong (University of Liverpool)H-Index: 1
#2Yihua Hu (University of Liverpool)H-Index: 23
Last. Liming Yan (Chang'an University)H-Index: 1
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This paper presents a delay-suppressed sliding mode observer (SMO) to observe the real-time rotor position of a permanent magnet synchronous machine (PMSM) controlled by vector control (VC) algorithms. Firstly, in order to solve the low pass filter (LPF) delay problem existing in the traditional signum function-based sliding mode observer (SMO), a brand-new hyperbolic function is initially selected as the switching function. Because a hyperbolic function with proper boundary layer is capable of ...
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With the increasing demand of applications that have two different output voltages, the single-input dual-output (SIDO) converter with fewer components is becoming the cost-effective option instead of employing two single-input single-output converters. However, the cross-regulation of different outputs is still a challenge in SIDO converters design. To save cost and obtain improved cross-regulation performance, a novel SIDO converter consisting of three active switches is proposed in this artic...
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#1Guifu Du (Soochow University (Suzhou))H-Index: 3
#2Jun Wang (Soochow University (Suzhou))H-Index: 14
Last. Yihua Hu (University of Liverpool)H-Index: 23
view all 6 authors...
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#1Chao GongH-Index: 1
#2Yihua HuH-Index: 23
Last. Huiqing WenH-Index: 15
view all 6 authors...
In order to enhance the control performance of the surface-mounted permanent magnet synchronous machines (PMSM) working under the low frequency situations, this letter innovatively proposes an accurate finite control set (FCS) model predictive current control (MPCC) method. First, a novel predicting plant model in the continuous-time domain based on the numerical solutions of the PMSM state-space model (differential equations) is developed. Without using the linear discretization implementation,...
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