Speed Synchronous Control of Multiple Permanent Magnet Synchronous Motors Based on an Improved Cross-Coupling Structure

Abstract

Abstract:Regarding the shortcomings of the cross-coupling control structure during the start-up of a multi-motor with load-namely, a large synchronization error and a long start-up time-this paper proposes a fuzzy self-adjusting cross-coupling control structure. This structure combines a fuzzy self-adjusting filter and an advanced synchronization compensator. The fuzzy self-adjusting filter adjusts the "softened speed", a newly established concept, so that each motor follows the trajectory of the softened speed during start-up, thus effectively reducing the synchronization error of the starting process. The advanced synchronization compensator is added to shorten the adjusting time of the motors. In addition, this paper analyzes the synchronization performance of the structure when the steady state is interrupted by a sudden step of load. Finally, this paper establishes an experimental platform for a synchronous speed control system for a permanent magnet synchronous motor, and verifies the effectiveness of the proposed structure and the correctness of the theoretical analysis through performing experiments.

Towards a generic optimal co-design of hardware architecture and control configuration for interacting subsystems

“…As a result, reference feedforward or disturbance feedforward can be obtained [47]. Finally, also synchronizing control (also known as cross-coupling) can be used as a control architecture, referring to a control loop extension used to improve output synchronization between coupled subsystems that are both parts of a larger system [48]. Thereby, the synchronous control of subsystem outputs is improved by taking into account the output deviations.…”

“…This can be applied by adding separate controllers (e.g., P/PI/PID) acting on the relative fault signals between different actuators. This can reduce the error between the different outputs when one or more subsystems are disturbed internally or externally [48].…”

Speed Tracking and Synchronization of a Multimotor System Based on Fuzzy ADRC and Enhanced Adjacent Coupling Scheme

“…where λ > 0 denotes a tuning parameter. From (8) and (23), the general sliding mode surface controller based on ESO is given as…”

“…Some effective synchronous control strategies have been investigated in recent decades, such as master-slave synchronization strategy [4], adjacent coupling control [5], ring coupling synchronization technique [6], cross-coupling synchronization strategy [7,8], virtual line-shaft synchronization scheme [9], and relative coupling synchronization method [10]. Among all the above mentioned synchronization schemes, adjacent coupling control is designed based on minimum relative axial thought, which means that the torque of each motor should be able to make the tracking error of itself converge to zero and lead the synchronization error to converge to zero stably between any motor and adjacent motors.…”

Stabilization and Speed Control of a Permanent Magnet Synchronous Motor with Dual-Rotating Rotors

“…In order to guarantee the stable operation of the multiple motors, connected in parallel, Bidart et al [13] proposed a scheme of selecting one of the motors as the master motor. Based on an improved cross-coupling structure [14], Wei C. et al adopted a fuzzy self-adjusting cross-coupling control structure to control speed synchronism for the multiple permanent magnet synchronous motors that were connected in parallel. For the multi-PMSM system connected in series, Chiasson et al [15] presented a strategy to control each motor's quadrature current.…”