Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Ruichang, Qiu"'
Publikováno v:
International Journal of Electrical Power & Energy Systems, Vol 162, Iss , Pp 110329- (2024)
Current condition monitoring of three-phase inverters is mainly for DC-link capacitance, with little attention paid to AC-side parameters, and some of these methods require the addition of DC current sensors or changes in operating conditions. In fac
Externí odkaz:
https://doaj.org/article/2967730fac48471e88e1981fc0449c32
Publikováno v:
Sensors, Vol 24, Iss 13, p 4304 (2024)
Capacitors are crucial components in power electronic converters, responsible for harmonic elimination, energy buffering, and voltage stabilization. However, they are also the most susceptible to damage due to their operational environment. Accurate
Externí odkaz:
https://doaj.org/article/019a3ae977ef4fe49f944e1ba559b25e
Publikováno v:
IEEE Access, Vol 11, Pp 19103-19110 (2023)
Currently, the offline manual periodic detection method is a well-established practice in detecting the thermal state of the converter heatsink. This method, however, is huge in maintenance costs. To lower maintenance costs and improve maintenance ef
Externí odkaz:
https://doaj.org/article/4ef11d61fc4446568987534fa7f08413
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-17 (2022)
Abstract The resonant frequency of the transformer contains information related to its structure. It is easier to identify the resonance frequency in the vibration signal during the hammer test and power on than in the operation of the transformer, b
Externí odkaz:
https://doaj.org/article/0938bc6ed5c3458dbcff0e68c01fb282
Publikováno v:
IEEE Access, Vol 10, Pp 58635-58646 (2022)
This paper proposes a new classification method, which can adaptively select effective features and give different classification weights according to the classification ability of features, this method effectively eliminates the influence of invalid
Externí odkaz:
https://doaj.org/article/42e75480a4e948199d808da81e368723
Publikováno v:
IET Power Electronics, Vol 14, Iss 11, Pp 1985-1994 (2021)
Abstract The beat phenomenon can be a critical issue in railway traction applications. This paper proposes a dual‐frequency compensation (DFC) method for the beat‐less algorithm to shift the spectrum of the beat voltages to a higher‐frequency r
Externí odkaz:
https://doaj.org/article/533de4cfccee45849ef2c865558bd30d
Publikováno v:
IEEE Access, Vol 7, Pp 152202-152213 (2019)
Aiming at the high-frequency resonance (HFR) and low-frequency oscillation (LFO) phenomena in high-speed railways, a comprehensive suppression method named voltage constant transient active oscillation compensation (VCT-AOC) is proposed. This method
Externí odkaz:
https://doaj.org/article/d875a1b1ca464e7aa2b90392c2baaa37
Publikováno v:
IEEE Access, Vol 7, Pp 123307-123319 (2019)
It is difficult to estimate and predict the fatigue state of switchgear in traction converter of urban Electric Multiple Unit (EMU). At the same time, this is just the purpose of this paper. Firstly, the power loss and junction temperature of the dev
Externí odkaz:
https://doaj.org/article/6252cf0f39eb4e68b819f5f9328a8a4b
Publikováno v:
IEEE Access, Vol 7, Pp 148934-148949 (2019)
The speed range of the rail transit traction system is very wide and mostly uses the hybrid pulse width modulation. The traditional hybrid pulse width modulation requires different types of modulation strategies to cooperate in switching, which inevi
Externí odkaz:
https://doaj.org/article/d157e034da45440eb0ada1b7a65dd85f
Publikováno v:
IEEE Access, Vol 7, Pp 104478-104488 (2019)
Aiming at the high-frequency resonance instability phenomenon in high-speed railways and traction network (simplified as “train-network”) system, a new modulation strategy is proposed. It is the windowed resonant harmonic elimination pulse width
Externí odkaz:
https://doaj.org/article/aab68f8443344540a197550174b0b66f