Showing papers by "Juan Carlos Balda published in 2002"

A versatile laboratory test bench for developing powertrains of electric vehicles

Abstract: This paper describes the implementation of a flexible laboratory test bench for developing electric vehicle (EV) and hybrid electric vehicle (HEV) powertrains in a university environment. The test bench, which is implemented using relatively low-cost off-the-shelf products, is capable of serving a broad variety of purposes ranging from the design and test of propulsion motor drives to the implementation of hardware-in-the-loop (HIL) powertrain control strategies. This paper illustrates the test bench capabilities by (a) simulating the Jeep Commander II, a fuel cell sport utility vehicle (SUV) from Daimler-Chrysler, performing the urban dynamometer driving schedule (UDDS), (b) simulating the Prius, a commercially available gasoline-electric hybrid compact car from Toyota, performing the Japanese "10-15 mode" driving schedule, and (c) determining the efficiency map of a three-phase induction motor (IM). Additionally, the test bench could be also used as a dynamic simulator for renewable energy sources such as wind turbine generators.

Analyzing common-mode chokes for induction motor drives

Abstract: This paper first analyzes the required characteristics of common-mode (CM) chokes for induction motor (IM) drive applications. It then presents an approach for specifying CM chokes in order to achieve specified CM-current reductions. To this end, a high-frequency IM model based on the IM zero-sequence impedance is suggested. The CM choke specification should be based on its particular application due to the unique characteristics of the CM currents. The ideas are verified by laboratory experiments.

Analysis, dimensional sizing and configuration comparison of switched-reluctance motors operating under multiphase excitation

Abstract: The paper presents a simple approach for analyzing switched reluctance motors (SRMs) operating under multiphase excitation. The analysis results in specific design coefficients [derived from the SRM flux and magnetomotive force (MMF) distributions that can be used in a methodology] to calculate the SRMs initial dimensions while taking into account the magnetic loading and electric loading. Finally, the approach enables comparison of SRM configurations for an application without performing complete designs. The magnetic loading (i.e., saturation) and torque of various SRM configurations designed using the proposed approach are verified through finite-element analysis (FEA).

Feedback control of an 8/6 SRM under multiphase excitation mode with short flux paths

Abstract: A switched reluctance motor (SRM) operating under multiphase excitation mode with short flux paths can achieve higher torque density. This has been indicated in the literature by numerical analysis, simulation and measurement of static torque. However, the design of controllers for real-time operation of such a SRM is quite difficult due to the nonlinearity and mutual coupling arising from multiphase excitation. On the other hand, most of previous investigations regarding control of a SRM are only for single-phase excitation. In this paper, a simple but effective design approach for the current and speed controllers of an 8/6 SRM under multiphase excitation mode with short flux paths is proposed in the low and intermediate speed ranges based on some reasonable assumptions and simplifications. Using a fixed-point DSP, the real-time operation and control of the SRM are implemented by means of linearized controllers. Our experimental results verify the effectiveness of this method.