Control Strategy of Dual-Winding Motor for Vehicle Electro-Hydraulic Braking Systems

Abstract

The electro-hydraulic brake (EHB) system of a vehicle should operate normally under all circumstances to ensure automotive safety. This redundant system guarantees the minimum required performance in the event of a critical failure of the brake system. In this study, we propose a redundant motor control strategy for the EHB to fully realize a functional safety design. The EHB system is composed of two identical electronic control units (ECUs), a dual three-phase dual-winding permanent magnet synchronous motor (DW-PMSM), and hydraulic components to generate brake pressure through the movement of an actuator. First, we propose a method to acquire the necessary motor current for generating brake pressure. Second, we present an initial driving method for the DW-PMSM for achieving stability before generating the braking pressure that involves setting the actuator’s origin position without a position sensor. Lastly, we describe a redundant motor control strategy for continuous brake operation depending on whether each ECU experiences system failure. The experimental results showed the effectiveness and feasibility of the control strategy of the dual-winding motor for a functional safety design.

Design, Modeling, and Control of Rotating and Linear Electric Machines for Automotive Applications

“…The accepted contributions are listed in the references section [1][2][3][4][5][6][7][8]. They can all be accessed through the following link: https://www.mdpi.com/journal/energies/special_ issues/rotating_and_linear_permanent-magnet_Machines (accessed on 29 July 2023).…”

“…Among the eight accepted papers, seven are research articles [1][2][3][4][5][6][7], and one is a review paper [8]. Contribution [1] presents the control strategy of a fault-tolerant permanent magnet synchronous motor.…”

“…Among the eight accepted papers, seven are research articles [1][2][3][4][5][6][7], and one is a review paper [8]. Contribution [1] presents the control strategy of a fault-tolerant permanent magnet synchronous motor. The fault tolerance is insured by adopting a dual-winding permanent magnet synchronous motor (DW-PMSM), with each winding set being controlled by a separate, fully independent electronic control unit (ECU).…”

“…While contributions [1][2][3][4][6][7][8] concern rotating electric machines, contribution [5] is the only paper dedicated to linear machines. The authors analyzed different single-phase tubular linear permanent magnet machines, and compared different original structures with partitioned stators, and a passive mover was sandwiched between two stators.…”