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Permanently excited synchronous motor with ferrite magnets

一种铁氧体磁铁、同步电机的技术，应用在带有静止电枢和旋转磁体的同步电动机、磁路、电动组件等方向，能够解决昂贵等问题

Active Publication Date: 2014-03-26
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However this is very expensive, so try switching to cheap ferrite magnets

Method used

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  • Permanently excited synchronous motor with ferrite magnets
  • Permanently excited synchronous motor with ferrite magnets
  • Permanently excited synchronous motor with ferrite magnets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] figure 1 The longitudinal section in the schematic diagram shows a permanent magnet excited synchronous motor 1 with a stator 2 in which a winding system 8 is embedded in the slot 12 of the laminate of the stator 2. The winding end 9 is constructed at the end face. There is a rotor 3 spaced radially inward from the air gap 10, which is connected to the shaft 4 in a torque-proof manner, and which moves around the rotation axis A along the rotation direction R when the permanent magnet excited synchronous motor 1 is in operation. A bowl-shaped ferrite magnet 5 which is preferably radially magnetized is directly arranged on the soft magnetic shaft 4. The ferrite magnet 5 and the shaft 4 are preferably bonded.

[0035] Similarly, a square ferrite magnet 5 can be used. However, it is positioned on a special polygonal-arranged sleeve, which in turn is connected to the shaft 4 in a torsionally fixed manner. But the shaft 4 may also have a flat surface completed by a material r...

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PUM

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Abstract

The invention relates to a permanently excited synchronous motor (1) which includes a stator (2) and a rotor (3). The stator has a winding system (8) arranged in grooves (12) of a laminated core of the stator (2) and forming winding overhangs (9) on end faces of the laminated core. The rotor (3) is connected in fixed rotative engagement to a shaft (4) and has ferrite magnets (5) which extend axially beyond the stator (2). The rotor electromagnetically interacts with the stator across an air gap there between during operation of the permanently excited synchronous motor to cause a rotation about an axis (A) in a rotation direction (R). A flux concentration element (6) is arranged radially across each of the ferrite magnets (5) of a magnetic pole (11) and bundles magnetic field lines of the ferrite magnet (5) onto an axial length of the laminated core of the stator (2). The flux concentration element is held and positioned by a fixing element (14) on the ferrite magnets (5) of a magnetic pole (11).

Description

Technical field [0001] The invention relates to a permanent magnet excited synchronous motor with a stator and a rotor. The stator has a winding system arranged in a slot of a plate stack. The winding end is formed on the end face of the plate stack. Connection where the rotor has a ferrite magnet. Background technique [0002] In order to obtain a high air gap inductance in a permanent magnet excited synchronous machine, a rare earth magnet is preferably used. However, this is very expensive, so try to switch to low-cost ferrite magnets. In this case, in order to obtain a high air gap inductance, some collecting devices such as those known from EP0126997 are used. This can only achieve sufficient scale when the rotor has a relatively high number of poles. Summary of the invention [0003] Taking this as a starting point, the purpose of the present invention is to obtain a sufficiently high air gap inductance when inexpensive ferrite magnets are used in the air gap of a permane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/27H02K1/28H02K15/03
CPCH02K21/14H02K2201/03H02K1/2766H02K1/272
Inventor 沃尔夫冈·施奈德罗尔夫·福尔默
Owner SIEMENS AG