Unlock instant, AI-driven research and patent intelligence for your innovation.

Synchronous motor

A permanent magnet synchronous motor and mover technology, which is applied to the shape/style/structure of the winding conductor to simplify production tools, reduce complexity, and reduce torque fluctuations

Inactive Publication Date: 2007-08-15
SIEMENS AG
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EMF harmonics can lead to the appearance of swing torque

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synchronous motor
  • Synchronous motor
  • Synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] FIG. 1 shows a permanent magnet synchronous motor 51 having a stator 3 and a mover 5 . The mover 55 has a permanent magnet 57 . The stator has coils 59 , the distribution of the coils 59 in the laminated stator 53 being indicated by dashed lines. A winding is formed by means of the coil 59 . The coil 59 forms an end winding 61 . The permanent magnet synchronous motor 1 is used to drive a shaft 63 .

[0045] FIG. 2 shows a winding connection diagram involving a permanent magnet synchronous motor through which a three-phase current with three phases U, V, W can flow. The winding diagram of the stator of the permanent magnet synchronous motor refers to a stator with 21 slots. The 21 slots are indicated by 1 to 21. The associated mover, not shown in Fig. 2, has 4 poles (magnetic poles), ie 2 pole pairs. According to the winding wiring diagram shown in FIG. 2 , the stator has 9 coils, and any phase of U, V, W shown in FIG. 2 has 3 coils. The winding shown in FIG. 2 ha...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A permanently-excited synchronous motor (51), comprises a stator (53) and a rotor (55), the stator (53) preferably comprising a three-phase alternating current winding and the rotor (55) permanent magnets (57). The stator (53) has 21 grooves (1-21) and the rotor (55) four magnetic poles (39). The grooves of the stator (53) are wound such that a first harmonic is suppressed by a winding pattern and a second harmonic suppressed by magnet geometry.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor and a method for suppressing harmonics. Background technique [0002] Compared with synchronous motors excited by electricity, permanent magnet synchronous motors that excite movers by means of permanent magnets have many advantages. For example, the mover of a permanent magnet synchronous motor does not require any electrical connections. Among them, permanent magnets with high energy density, that is, permanent magnets with a large product of magnetic flux density and field strength, prove to be superior to permanent magnets with lower energy. It is also known that permanent magnets can not only be arranged planarly with respect to the air gap, but can also be positioned in the form of a joint configuration (flux concentration). [0003] Unfavorable oscillating torque occurs in permanent magnet synchronous motors. As described in EP 0545060 B1 for conventional electric motors, a mover o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02K3/28
CPCH02K3/28
Inventor 罗尔夫·沃尔默
Owner SIEMENS AG