Open type winding motor variable structure driving topology

Abstract

The invention discloses an open type winding motor variable structure driving topology comprising an H bridge group (40), a power supply switch group (50), and a power supply group (60). When a number of open-type winding motor phases is 2*N, and the N is greater than and equal to 2, the power supply group (60) comprises N DC power power supplies (61), and each of the DC power power supplies (61) is provided with an output positive terminal and an output negative terminal. The power supply switch group (50) comprises 4N power supply switches (51). The H bridge group (40) comprises 4*2*N power tubes (41) to form 2*N H bridges (42). A left bridge arm and a right bridge arm of each H bridge can be divided by adopting an open type motor as a boundary, and each bridge arm is formed by serially connecting the drain electrodes and the source electrodes of two power tubes, binding posts (43) are disposed between the source electrodes and the drain electrodes, and in addition, the binding posts are connected with the terminals of the winding of the open type winding motor. Two H bridges connected with the two-phase winding terminals of the open type winding motor are in a group, and the power can be supplied by one DC power power supply.

Description

technical field [0001] The invention relates to the field of motor drive control, in particular to a variable structure drive topology. Background technique [0002] In the motor drive, the topology of the driver generally adopts a three-phase full-bridge structure, that is, six power tubes form three bridge arms, and the middle point of each bridge arm is connected to each phase winding terminal of the motor. The advantage of this topology is that the number of power devices is small, the volume is small, and the cost is low, but its disadvantages are also very obvious. Only one of the power tubes fails, and due to the constraint that the sum of the three-phase currents is zero, the other five power tubes Tubes will not work properly, so this topology is inflexible and cannot be reconfigured after a failure. [0003] In open winding motor drives, the driver generally adopts an independent H-bridge structure, that is, the two terminals of each phase winding are all led out ...

AI Technical Summary

Problems solved by technology

However, this independent H-bridge structure overcomes the shortcomings of the three-phase full-bridge structure, and has certain flexibility and can perform fault reconstruction. However, its structure is fixed and cannot better meet the wide range of motor systems. Use requirements, such as high speed, low speed, light load, heavy load, fault and other working conditions

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