Development of an Experimental Platform to Drive the Switched Reluctance Machine

Abstract

Abstract. This paper presents the implementation of an experimental platform for the study and drive the Switched Reluctance Machine (SRM) 6x4 as generator and motor. The platform allows trials for the reluctance machine under various operating conditions such as speed, excitement and magnetization variable angles (θoff), allowing study their behavior in wind generation. The test parameters are fully configurable through an application developed specifically for this job. It was also used a system of acquisition and processing of low-cost and high-performance data (DSP / FPGA), which guarantees the precise activation and control of all experimental platform. The experimental results are presented and discussed.

Proposal of a Test Bench for Switched Reluctance Machine 8/6 for Wind Energy Application

“…In operation, the SRM needs a converter that provides excitement for it. The literature shows a variety of topologies of converters used for machine operation, however the most widely used due to operational characteristics is the Half-Bridge (HB) [1], [2], [3], [4], [6] and [7].…”

“…Figure 9 shows the circuit used in the converter for a single phase, others phases have a similar circuit, which is an adaptation of the converter used in [1], [2], [3], [4] for four phases and with two bus, one for excitement and other for Load.…”

“…On generation, despite the diversity of alternative sources available, rotating electrical generator are responsible for almost all of the electricity produced. Giving unparalleled importance do electrical machines [1]. Thus, the electrical must be under constant investigation, in the search for better indices of efficiency and performance.…”

Voltage Behavior in the Switched Reluctance Generator Due to Different Speed Profiles Aimed at Use in Small Wind Turbines

“…When one of the rotor poles is aligned with the stator pole excited, a stable equilibrium is created, causing a natural tendency of the rotor to align with the excited pole, which causes an increase in the inductance in this phase. The figure 2 shows the inductance profile obtained from SRM that depend mainly on the rotor shaft position and machine excitation current, the curve was obtained by finite element method and is presented in [1]. The curve represents a quarter turn, repeating the same behavior over the course of a ride, for all other stages the curve is shifted by 30 and 60 degrees.…”

“…In operation the SRM needs a converter that provides excitement for it. The literature shows a variety of topologies of converters used for machine operation, however the most widely used due to operational characteristics is the Half-Bridge (HB) [1], [2], [4] e [7]. Figure 04 shows the circuit of this converter to drive an MRV 6x4 with a relay to determine the type of actuator to be held, motor or generator.…”