# Intelligent Power Unit Parameters Design and the Influence Analyses

^{*}

## Abstract

**:**

## 1. Introduction

## 2. Capacitor Parasitic Parameter

#### 2.1. Equivalent Series Resistance of Capacitor

- R: capacitor equivalent resistance (ESR);
- L: a single core length;
- S: a single core cross-sectional area;
- ρ: metallized film equivalent resistivity.

#### 2.2. Equivalent Series Inductance of Capacitor

## 3. Equivalent Parameters of Busbar

- L: inductance of circular section straight wire;
- l: wire length;
- r: conductor radius;
- μ
_{0}: vacuum permeability.

- B: magnetic flux density;
- I: current in the loop;
- dl: the loop differential;
- μ
_{0}: vacuum permeability.

#### 3.1. Busbar Simulation and Optimization

- L: two wires’ self-induction;
- l: wire length;
- D: the distance between the two wires;
- R: conductor radius.

#### 3.2. Busbar Measurement

_{module}and L

_{cap}are already known as 9.1 nH and 14 nH, respectively, in their datasheet.

- V
_{ce}: the maximum voltage at IGBT power terminal when IGBT turns off; - V
_{dc}: the test condition DC voltage; - L
_{module}: the ESL of the power module; - L
_{cap}: the ESL of the capacitor; - di/dt: the I
_{c}current rate.

## 4. Conclusions

## Author Contributions

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Conflicts of Interest

## References

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**Figure 5.**Busbar outline drawing. (

**A**) Common shape; (

**B**) adding laminated area; (

**C**) three-layer composite structure; (

**D**) three-layer and edge welding structure.

Busbar | ESL (Simulation) @10 kHz |
---|---|

A | 42 nH |

B | 29 nH |

C | 27 nH |

D | 23 nH |

Busbar | Maximum Voltage at IGBT Power Terminal (V) | ESL (Calculation) (nH) |
---|---|---|

A | 710 | 40 |

B | 692 | 32 |

C | 679 | 30 |

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## Share and Cite

**MDPI and ACS Style**

Zhu, Z.; Zhao, H.; Liu, X.; Wang, H.; Liu, Z.
Intelligent Power Unit Parameters Design and the Influence Analyses. *World Electr. Veh. J.* **2021**, *12*, 238.
https://doi.org/10.3390/wevj12040238

**AMA Style**

Zhu Z, Zhao H, Liu X, Wang H, Liu Z.
Intelligent Power Unit Parameters Design and the Influence Analyses. *World Electric Vehicle Journal*. 2021; 12(4):238.
https://doi.org/10.3390/wevj12040238

**Chicago/Turabian Style**

Zhu, Zhanshan, Huichao Zhao, Xiaolu Liu, Hongbao Wang, and Zhiqiang Liu.
2021. "Intelligent Power Unit Parameters Design and the Influence Analyses" *World Electric Vehicle Journal* 12, no. 4: 238.
https://doi.org/10.3390/wevj12040238