Double-three-phase permanent magnet synchronous motor
A dual-phase permanent magnet, synchronous motor technology, applied in the shape/style/structure of winding conductors, etc., can solve problems such as poor fault tolerance, performance degradation of permanent magnet synchronous motors, and permanent damage to inverters.
Active Publication Date: 2016-10-26
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology
However, the fault tolerance of the 30° dual-three-phase permanent magnet synchronous motor is poor. When a short-circuit fault occurs, the three-phase transient short-circuit current is very large, causing permanent damage to the inverter, and it is easy to cause irreversible demagnetization of the permanent magnet. And produce a large peak braking torque, which in turn leads to a reduction in the performance of the permanent magnet synchronous motor
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[0043] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0044] In the dual-three-phase permanent magnet synchronous motor disclosed in this embodiment, two sets of three-phase windings are wound in slots of the stator. The first set of three-phase windings includes a first-phase winding, a second-phase winding and a third-phase winding. The first phase winding, the second phase winding and the third phase winding are arranged symmetrically so that the three phases of the first set of three phase windings are 120° electrical angle differe...
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The invention discloses a double-three-phase permanent magnet synchronous motor. The interior of a groove of a stator is provided with two sets of three-phase windings in a winding manner. Three-phase windings of the first set of three-phase windings are arranged symmetrically. Three-phase windings of the second set of three-phase windings are arranged symmetrically. The first set of three-phase windings and the second set of three-phase windings respectively employ a 15-degree winding connection mode, thereby enabling the mutual difference of electrical angles among the corresponding phases of the three-phase windings of the first and second sets of three-phase windings to be 15 degree. The permanent magnet synchronous motor employs a 15-degree winding connection mode, and the windings are large in self-inductance. Moreover, the mutual inductance of the adjacent phases is small. When a short circuit fault happens, an instant peak short circuit current is smaller, so the risk of damage to an inverter is smaller, and the peak braking torque is smaller. In addition, the three-phase winding stator magnetomotive force is smaller in harmonic content in the 15-degree winding connection mode during the short circuit fault, thereby enabling the peak demagnetization stator magnetomotive force to be smaller, enabling the impact on permanent magnetism irreversible demagnetization to be smaller, and improving the performance of the double-three-phase permanent magnet synchronous motor.
Description
technical field [0001] The present application relates to the field of motor structure, and more specifically, relates to a double-three-phase permanent magnet synchronous motor. Background technique [0002] Traditional permanent magnet synchronous motors mainly use three-phase power supply, so they have disadvantages such as poor fault tolerance and large torque ripple. Therefore, multi-phase permanent magnet synchronous motors have been widely studied and applied in recent years. In addition to the advantages of traditional permanent magnet synchronous motors, they also have the advantages of low torque ripple, good fault tolerance, and many degrees of control freedom. Currently, five-phase The research and application of six-phase (that is, double three-phase) motors is the most extensive. Among them, the dual three-phase permanent magnet synchronous motor includes two sets of three-phase windings, and the two sets of three-phase windings can be powered by independent t...
Claims
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Login to View More IPC IPC(8): H02K3/12H02K3/28
CPCH02K3/12H02K3/28
Inventor 冯江华诸自强许培林褚文强王禹陈致初许峻峰郭淑英冯守智史俊旭
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST