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Multi-phase motor winding switching circuit

A technology of winding switching and multi-phase motors, which is applied in the direction of AC motor control, electrical components, control systems, etc., can solve the problems of low energy utilization and achieve the effects of small quantity, small influence, and low loss

Active Publication Date: 2013-09-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problem of low energy utilization rate of the existing switching device, and proposes a multi-phase motor winding switching circuit

Method used

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specific Embodiment approach 1

[0034] Specific implementation mode one: see figure 1 Describe this embodiment, the multi-phase motor winding switching circuit described in this embodiment, the multi-phase motor is an m-phase motor, and m≥3, the m-phase motor has n winding units and an inverter, and the inverter It is an m-phase bridge inverter, in which m first ends of each winding unit are connected to m output buses of the inverter, and it includes n winding switching circuit units, and each winding switching circuit unit includes a switching circuit unit and a clamping circuit unit; each switching circuit unit is composed of m switching units, each switching unit is composed of a switching tube, and each clamping circuit unit is composed of m+1 diodes,

[0035] Each tail end of each winding unit is correspondingly connected to the collector of the switching tube of one switching circuit unit of the n winding switching circuit units, and the emitters of the switching tubes of the m switching units of eac...

specific Embodiment approach 2

[0038] Specific implementation mode two: see figure 2 Describe this embodiment, the multi-phase motor winding switching circuit described in this embodiment, the multi-phase motor is an m-phase motor, and m≥3, the m-phase motor has n winding units and an inverter, and the inverter It is an m-phase bridge inverter, in which the corresponding phases of each winding unit are connected in series in sequence, and the m first terminals of the series-connected windings are connected to the m output terminals of the inverter, which includes n winding switching circuit units , each winding switching circuit unit includes a switching circuit unit and a clamping circuit unit; each switching circuit unit is composed of m switching units, each switching unit is composed of 1 switching tube, and each clamping circuit unit is composed of m+1 composed of diodes,

[0039] Each tail end of each winding unit is correspondingly connected to the collector of the switching tube of one switching c...

specific Embodiment approach 3

[0042] Specific implementation mode three: see image 3 Describe this embodiment, the multi-phase motor winding switching circuit described in this embodiment, the multi-phase motor is an m-phase motor, and m≥3, the m-phase motor has n winding units and an inverter, and the inverter It is an m-phase half-bridge inverter powered by positive and negative dual power supplies, in which m first ends of each winding unit are connected to m output busbars of the inverter, and it includes n winding switching circuit units, each Each winding switching circuit unit includes a switching circuit unit and a clamping circuit unit; each switching circuit unit is composed of m switching units, each switching unit is composed of 2 switching tubes, and the emitters of the 2 switching tubes are connected together. A clamping circuit unit consists of 2m diodes,

[0043] The m collectors of the m switching units of each switching circuit unit are respectively connected with the m tail ends of eac...

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Abstract

The invention discloses a multi-phase motor winding switching circuit, which belongs to the field of motor control and solves the problem that the energy utilization rate of an existing switching device is low. m head ends of each winding unit of an m-phase motor are connected to m output bus wires of an inverter, each tail end of each winding unit is correspondingly connected with a collector electrode of a switching tube of one switching circuit unit of n winding switching circuit units, emitting electrodes of switching tubes of m switching units of each switching circuit unit are correspondingly connected with a cathode of one diode of one clamping circuit unit after being connected together, an anode of the diode is connected with a power supply direct-current bus wire cathode which drives the inverter of the m-phase motor together, anodes of other m diodes of each clamping circuit unit are correspondingly connected with collector electrodes of the switching tubes of the m switching units of the switching circuit unit together, m diodes are in common cathodes, and anodes of power supply direct-current bus wires are simultaneously connected together. The multi-phase machine winding switching circuit disclosed by the invention is suitable for a motor drive system.

Description

technical field [0001] The invention relates to a multi-phase motor winding switching circuit, which belongs to the field of motor control. Background technique [0002] In the linear motor drive system with long primary, short secondary and long travel, in order to reduce the capacity of the inverter and reduce system loss, the following method is often adopted: the primary winding is segmented along the direction of motion, and each segment of winding is equivalent to an independent The multi-phase motor detects the position of the mover through the position sensor, and through the winding switching circuit, the winding of the mover reaching the position section is energized, while the windings of the passing section and the non-reaching section are not energized. In this way, the energy loss is reduced, and the mover dragging work is avoided, and the dynamic characteristics and reliability of the system are improved. Figure 9 Shown is a schematic diagram of the compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/18
Inventor 寇宝泉祝贺张超宁张义刘奉海
Owner HARBIN INST OF TECH
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