Abstract
In silicon carbide (SiC)-based adjustable speed drives, the fast-switching voltage pulses cause power cables to act like transmission lines, leading to severe overvoltage at motor terminals. This letter proposes an active dv / dt filter to mitigate the motor terminal overvoltage due to the reflected wave phenomenon in SiC-based motor drive systems. The active dv / dt filter consists of a T-type inverter and an inductor and capacitor (LC) passive filter, where the T-type inverter generates the quasi-three-level (Q3L) pulse width modulation (PWM) voltage to actively regulate the dv / dt of the voltage supplied to the adjustable speed drives. The operation mechanism of the active dv / dt filter is mathematically derived and experimentally verified. The analysis shows that when the dwell time of the Q3L PWM voltage aligns with half of the resonant period of the LC network, the dv / dt of the inverter output voltage can be actively controlled. The experimental results show that the active dv / dt filter can mitigate the overvoltage at motor terminals within 1.15 pu, compared with the conventional two-level inverter.
| Original language | English |
|---|---|
| Pages (from-to) | (In-Press) |
| Number of pages | 6 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | (In-Press) |
| Early online date | 18 Jun 2024 |
| DOIs | |
| Publication status | E-pub ahead of print - 18 Jun 2024 |
Bibliographical note
© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.
This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.
Funder
This work was supported in part by the UK EPSRC under grant EP/S00081X/1.Funding
This work was supported in part by the UK EPSRC under grant EP/S00081X/1.
| Funders | Funder number |
|---|---|
| Engineering and Physical Sciences Research Council | EP/S00081X/1 |
Keywords
- Active dv/dt filter
- adjustable speed drives
- overvoltage
- reflected wave phenomenon
- SiC metal-oxidesemiconductor field-effect transistors (MOSFETs)