A reconfigurable structure electronic commutator for a dual BLDC motor EV drive

Abstract

Abstract. An electronic commutator that can drive a PM BLDC motor either in the full bridge or half bridge configuration has been developed. This commutator allows increasing the motor speed over the nominal value, hence the motor is able to operate within a wide constant power speed range. An application of the commutator with a reconfigurable structure for the double drive of a small electric vehicle Elipsa has been presented. The driveline consists of two independent commutators feeding the motors coupled by gears with rear wheels of the vehicle. Both commutators are controlled by a common control system based on a signal microcontroller. The results of road tests indicate new areas of BLCD motor drives application. The fact that the BLCD motor work in the second speed range does not require any changes in the motor construction and at the same time does not significantly deteriorate the drive efficiency is an indisputable advantage of the presented solution.

Recovery braking of variable-structure electronic commutator for BLDC motor

“…It was shown that this difficulty could be eliminated by appropriate switching of the modes of converter's transistors control in a cycle: braking→motor's work→braking. The solutions of both problems were registered for patent protection [13].…”

“…To counteract this phenomenon, it was proposed to control the commutator's switches in a way enabling work with electric braking [13]. This method requires the braking operation mode and motor operation mode to be periodically switched over.…”

Performance evaluation of electric vehicle brushless direct current motor with a novel high-performance control strategy with experimental implementation

“…However, this method necessitates additional sources selection switches, an electronic gearshift, and requires access to the different connection of the motor winding. An electronic commutator based on a reconfigurable structure of the BLDC motor inverter is presented in Biskup et al 14 Additional switches are added to achieve higher speed operation. Nonetheless, this structure needs the motor neutral connection, which is not always easy to access.…”

Control method of one-branch controlled three-phase rectifier with no rotor position detection

“…Therefore, they are commonly applied in military, industrial and domestic equipment. Modern PM motors usually cooperate with different type of power converters to obtain high efficiency across a wide range of electromechanical characteristics [1][2][3][4][5][6][7][8]. The full-bridge controlled converter is a widely used solution for PM motors which associate two other phases with the highest instantaneous value of back EMF voltages [9].…”