The electrical parameters of the insulated gate bipolar transistor (IGBT) module change over service life. By detecting values these parameters, aging state IGBT can be identified. Bond wire damage is main characteristic degradation, and impedance bond directly affect short-circuit current. In this article, an condition monitoring drive circuit based on a self-excited current designed. connected to module, which obtain data from lowest level determine most quickly. First, relationship...

Permanent magnet linear synchronous motors have the advantages of high thrust density, acceleration, speed, and efficiency, which are widely used in CNC lathes, lithography machines, rail transportation, etc. In high-speed, high-precision servo control systems, detent force fluctuation caused by end effect can easily cause problems such as speed fluctuation, mechanical vibration electromagnetic noise, affect performance permanent motors. Aiming at motor, this paper proposes a stepped double...

By analyzing the traction technologies used in existing locomotives and high speed trains, development current situation of technology were described, some urgent problems which need to be solved presented. Firstly DC motor Chinese railway introduced, process AC summarized. Secondly several types CRH (China Railway High-speed) trains had been compared from various technical aspects such as main circuit structures, MT ratio, link loop. Finally, studies should carried out for future are

Insulated-gate bipolar transistors (IGBTs) always operate in parallel for a large output current modern high-power converter design. Suppressing dynamic imbalance of the paralleled IGBTs is crucial stable operation converters. Though could be suppressed by symmetrical power loop design and consistent control signal, there an inherent parameter difference or gate circuit caused practical factors such as materials, physical dimensions installation methods. The compensated with delay certain...

The Chinese railways are characterized by a wide range of various locomotive series. Nowadays, 80% the locomotives driven electricity run on most main railroads. Most electric designed AC-DC traction system till 2003 while DJ1 manufactured AC-DC-AC system. Power Electronics is one pivotal parts whole equipment, playing important roles in power outputting, torque releasing, brake dynamic inflicting etc. This paper probes into 3 ages electronics technology used electrical China....

The development of high power IGBTs greatly improves the capacity and efficiency electrical converter systems, making inverter systems widely used in most fields modern society. With density, more compacted design structure strength, traction converters could promote faster locomotives. Reliable quality protection for IGBT drivers can lead to best characteristics a module. In this paper, simulation model was built analyze kind failure based on one type locomotive. possible reason fault...

To better develop the arc heater power-supply system, this paper presents an improved plasma model, which is formulated from famous Mayr and Cassie models. Considering real working conditions, disturbance created by unstable mass flow rate taken into account in to improve accuracy. An 18-pulse thyristor rectifier, with constant current output, used as power-supply. The proposed model established MATLAB/Simulink whole power system test implemented. considerable degree of agreement between...

For position sensorless control of permanent magnet synchronous motor (PMSM), a single estimation algorithm is difficult to satisfy the accurate rotor speed and in wide range. In this paper, influence non-ideal factors such as inverter factors, stator resistance changes on accuracy are analyzed. According analyze, pulsating high frequency voltage injection method more suitable for start low The estimated by model reference adaptive system (MRAS) high-speed stage. By using combination MRAS,...

Currently, the auxiliary converter in power supply system of a modern tram adopts Si IGBT as its switching device and with 1700 V/225 A SiC MOSFET module commercially available from Cree, an using all devices is now possible. prototype developed during this study. The author(s) derive loss calculation formula according to topology principle each part can be calculated based on datasheet. Then, static dynamic characteristics used are tested, which aids fully understanding performance provides...

With regard to the auxiliary power systems used in public transport such as hybrid bus, trolleybus, light rail trams, and subways, riding weight volume of equipment need be reduced order accommodate more passengers or provide a comfortable space. A converter with higher capacity density, smaller volume, lower was developed improve vehicle layout design capability. advantages faster switching frequency, losses, working temperature, silicon carbide metal-oxide-semiconductor field-effect...

Abstract Insulated gate bipolar transistors (IGBT) short‐circuit (SC) protection is one of the most important methods for IGBT converter equipment. The fast detection and response time could reduce permanent damage devices, extend their use life cycle. At present, collector emitter voltage v ce desaturation method widely used in commercial drive circuit, which has blanking fault protection. In this paper, an improved adaptive SC proposed to realize adjustment under different conditions. By...

The four-quadrant converters applied to the locomotive traction have higher requirements for power density and reliability. Compared with conventional IGBTs, RC-IGBTs advantages of low thermal resistance high current density. In this paper, RC-IGBT is converter working characteristics pulse distribution under desaturation control are analyzed. model parameters single-phase full-bridge inverter given by using PWM inverter. Combined special gate RC-IGBT, flow implementation method summarized....

Most power systems of modern electric locomotives, EMUs, high-speed trains, urban rail transits and vehicles are composed by IGBT converter. Compared with the general inverter industrial converter, converter has higher requirements in density, volume structure, installation quality other indicators. Reverse Conducting (RC-IGBT) constructs conventional function freewheel diode a single chip, which greater current capacity same package referring to IGBT. Under cooling conditions, RC-IGBT...

6.5 kV level IGBT (Insulated Gate Bipolar Transistor) modules are widely applied in megawatt locomotive (MCUs) traction converters, to achieve an upper 3.5 DC link, which is beneficial for decreasing power losses and increasing the density. Reverse Conducting (RC-IGBT) constructs conventional function freewheel diode a single chip, has greater flow ability same package volume. In cooling conditions, RC-IGBT allows higher operating temperature. this paper, mathematic model developed,...

In the application of vehicle power supply and distributed generation, there are strict requirements for pulse width modulation (PWM) converter regarding density reliability. When compared with conventional insulated gate bipolar transistor (IGBT) module, Reverse Conducting-Insulated Gate Bipolar Transistor (RC-IGBT) same package has a lower thermal resistance higher current tolerance. By applying desaturation control, reverse recovery loss RC-IGBT diode may be reduced. this paper, threshold...

In the application where switching frequency is above 50kHz, pulses that drive high power silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET) need special requirements to be considered for output power. Due affected by characteristics of SiC MOSFET chip, such as small area and current density, device heat serious. When or bridge arm under condition overcurrent short circuit, at moment, driver circuit must response fast possible. Compared with conventional (Si)...

Modern AC traction locomotives, are characteristic of miniaturization, increasing switching frequency and packaging densities, require increased current handling capability packaged devices in applications related to power conversion. These ever-increasing demands pushed the efficiency silicon semiconductor power-device limit. The heat dissipation system must be taken into account. temperature field a product can picked up optimize design improve reliability by technology thermal analysis...

In this paper, the operation control and loss characteristics of a PSFB (Phase-Shifted Full-Bridge) ZVS DC/DC converter applied to auxiliary power system has been investigated. The working characteristics, device losses efficiency circuit topology for 1500Vdc supply using 3300V Si IGBT are studied. One type ISOP (Input-Series Output-Parallel) double bridge 1700V SiC MOSFET is proposed. improved input voltage sharing method used meet requirements capacity it also improves system's rapidity...