A DESIGN CONCEPT OF ELECTRICAL EQUIPMENT FOR DIFFERENT CLASSES OF VEHICLES EQUIPPED WITH A HYBRID POWER INSTALLATION

Abstract

A fundamental approach to calculating the parameters of electric equipment for urban passenger vehicles fitted with a hybrid power installation (HPI) consisting of a generating unit (GU), a traction converter, and an energy storage is described. The following factors accompanying an HPI-based vehicle operation process are considered: the speed of communication, the length of spans, dynamic performance, power reserve, maintenance period, integration into transport infrastructure, electrical safety, reliability and the equipment procurement cost. The scheme of a series-type hybrid power installation containing a GU, a traction converter, an energy storage, and a drive motor is presented. Succession in designing electric traction systems is substantiated. The HPI operation principle is briefly described. The power balance components, the specific features of the parameters corresponding to the standard and critical propulsion cycles, the HPI component efficiencies used for accounting power losses in the HPI, and specific features of the standard propulsion cycle affecting the HPI design (acceleration, deceleration, etc.) are pointed out. The main assumptions are enumerated, and the principles of calculating the HPI parameters for different classes of vehicles are mentioned. The concept of specific units is introduced. Propulsion with a rising slope while maintaining the standard length of span and communications speed is adopted as a critical cycle. A description of selecting the slope value for the critical driving cycle and the requirements for vehicle performance in the critical driving cycle are formulated. The critical cycle characteristic is presented based on which the HPI main components are calculated, selected and optimized: the GU power and the energy storage capacity and power.