# Performance Simulation of Long-Stator Linear Synchronous Motor for High-Speed Maglev Train under Three-Phase Short-Circuit Fault

^{*}

## Abstract

**:**

## 1. Introduction

## 2. Traction Power Supply System of High-Speed Maglev Train

## 3. Mathematical Model of Three-Phase Short-Circuit Fault of LLSM

## 4. Simulation of Three-Phase Short-Circuit Fault of LLSM

#### 4.1. Simulation Model

#### 4.2. The Fault Operation Process

^{2}. The speed of the train during the whole process drops by 4.1 km/h. The acceleration-distance curve is shown in Figure 7.

#### 4.3. Failure Performance of the LLSM at Different Speeds

#### 4.4. Failure Performance of the LLSM at Different Lengths of Fault Stator Segment

## 5. Simulation of Three-Phase Short-Circuit Fault during Line Operation

#### 5.1. Simulation Model

#### 5.2. Fault during Acceleration or Deceleration Process

^{2}to 0.17 m/s

^{2}during the process. The acceleration can return to normal after the train leaves the fault segment and enters the next normal stator segment.

^{th}segment in the left-side stator, of which the distance is 42 km, at this time, the train is decelerating. The stator currents and forces of the LLSM in two sides during the whole process are shown in Figure 12.

^{2}to 0.54 m/s

^{2}during the process. The deceleration can return to normal after the train leaves the fault segment and enters the next normal stator segment.

#### 5.3. Fault during Constant Speed

## 6. Conclusions

## Author Contributions

## Funding

## Data Availability Statement

## Conflicts of Interest

## References

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**Figure 4.**Single-phase equivalent circuit of the LLSM with three-phase short-circuit fault: (

**a**) normal part; (

**b**) fault part.

**Figure 10.**The current and thrust force of LLSM at two sides when the fault occurs during acceleration process: (

**a**) thrust of the fault side LLSM; (

**b**) thrust of the normal side LLSM; (

**c**) current of the fault side stator segment; (

**d**) current of the normal side stator segment.

**Figure 12.**The current and thrust force of LLSM at two sides when the fault occurs during deceleration process: (

**a**) thrust of the fault side LLSM; (

**b**) thrust of the normal side LLSM; (

**c**) current of the fault side stator segment; (

**d**) current of the normal side stator segment.

**Figure 14.**The current and thrust force of LLSM at two sides when the fault occurs during constant speed: (

**a**) thrust of the fault side LLSM; (

**b**) thrust of the normal side LLSM; (

**c**) current of the fault side stator segment; (

**d**) current of the normal side stator segment.

Parameters | Value |
---|---|

Pitch Length (m) | 0.258 |

Back EMF Coefficient (V/(km/h)/km) | 74.84 |

One-side Motor Thrust Coefficient (kN/A/km) | 0.735 |

Train Length (m) | 128.5 |

Stator Segment Length (m) | 1200 |

Train Mass (t) | 330 |

Parameters | Value |
---|---|

Feeder Cable Resistance ($\mathsf{\Omega}$/km) | 0.05833 |

Feeder Cable Inductance (H/km) | 0.000071 |

Stator Resistance ($\mathsf{\Omega}/\mathrm{km}$) | 0.23 |

D-axis Inductance (mH) | 3 |

Q-axis Inductance (mH) | 2.8 |

Converter Maximum Capacity (MVA) | 24 |

DC Bus Voltage (V) | 4400 |

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**MDPI and ACS Style**

Yang, H.; Li, Y.; Lu, Q.
Performance Simulation of Long-Stator Linear Synchronous Motor for High-Speed Maglev Train under Three-Phase Short-Circuit Fault. *World Electr. Veh. J.* **2022**, *13*, 216.
https://doi.org/10.3390/wevj13110216

**AMA Style**

Yang H, Li Y, Lu Q.
Performance Simulation of Long-Stator Linear Synchronous Motor for High-Speed Maglev Train under Three-Phase Short-Circuit Fault. *World Electric Vehicle Journal*. 2022; 13(11):216.
https://doi.org/10.3390/wevj13110216

**Chicago/Turabian Style**

Yang, Hongyi, Yanxin Li, and Qinfen Lu.
2022. "Performance Simulation of Long-Stator Linear Synchronous Motor for High-Speed Maglev Train under Three-Phase Short-Circuit Fault" *World Electric Vehicle Journal* 13, no. 11: 216.
https://doi.org/10.3390/wevj13110216