In this paper an asymmetrical duty cycle control strategy was proposed to the TPTL dc/dc converter. The modified converter remains all the advantages of original control strategy; meanwhile, soft-switching can be achieved using the energy stored in output filter inductance and leakage inductances of transformers (or resonant inductances).Three-phase three-level (TPTL) dc/dc converter has the ad...

This letter proposes a general compensation method to eliminate the impact of parasitic inductances on measurement accuracy on-state voltage power semiconductor devices in operating converters. It is an online and non-invasive by measuring output current inverter device only. The their are verified experimentally through traction system.

cell problem Ω̇ = ǫBΩ + ǫF (t) with an effective matrix B and an explicitly-known F (t). We provide necessary and sufficient condition for the accuracy of the approximation (over a O(ǫ) time-scale), and show how B can be computed (at a cost independent of ǫ). As a direct application, we investigate the possibility of using RLC circuits to harvest the energy contained in small scale oscillations ...

Most simulation models of electric machines use the coupled circuit approach, where the machine is considered as an electric circuit element with time-varying inductances (abc model) or with constant inductances (dq0 model). On the other hand, the rotating magnetic field approach, which considers the electric machine as two groups of windings producing rotating magnetic fields and can give insi...

One of the most promising inductive power transfer applications is the wireless power supply for locomotives which may cancel the need for pantographs. In order to meet the dynamic and high power demands of wireless power supplies for locomotives, a relatively long transmitter track and multiple receivers are usually adopted. However, during the dynamic charging, the mutual inductances between ...

The direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) has become attractive because of its simplicity and fast torque response. However, mechanical sensors have caused problems to the system. It is possible to overcome the disadvantage if the initial rotor position is known. For the initial rotor position detection, the structural and magnetic saturation saliencies are fr...

This paper proposes a novel permanent magnet linear motor possessing two movers and one stator. The two movers are isolated and can interact with the stator poles to generate independent forces and motions. Compared with conventional multiple motor driving system, it helps to increase the system compactness, and thus improve the power density and working efficiency. The magnetic field distribut...