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Motors with flux weakening devices

A magnetic flux and magnetic field technology, applied in synchronous motors with stationary armatures and rotating magnets, synchronous motors with rotating armatures and stationary magnets, electromechanical devices, etc., can solve the problems of inflexibility, complex cost, and high cost , to reduce friction

Active Publication Date: 2020-06-09
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Conventional methods and devices are inflexible, expensive and complex to manufacture and incur significant cost

Method used

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  • Motors with flux weakening devices
  • Motors with flux weakening devices
  • Motors with flux weakening devices

Examples

Experimental program
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Embodiment Construction

[0053] Embodiments of the invention allow a reduction of the influence of the field flux of the electric machine by the reluctance, especially in the spatial region of the leakage flux. In this case, the leakage flux can describe the part of the magnetic flux of the electric machine which extends over parts of the machine which do not directly generate a force or a torque by interaction. In contrast, the magnetic field flux can describe the torque or the magnetic flux portion of the torque which contributes directly to the motor's torque via the Lorentz force.

[0054] exist figure 1 The electrical machine 1 illustrated in longitudinal section in FIG. 2 has a stator 3 , which in particular comprises unillustrated conductors placed around the stator 3 , in particular in slots between the teeth of the stator 3 . The electric machine 1 , in particular embodied as a synchronous machine, furthermore has a rotor 5 which includes a magnetic field generating device 7 with a rotor set...

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Abstract

An electric machine includes a rotor having a magnetic field generating device for generating a magnetic flux. A flux changing apparatus of the electric machine includes an axially displaceable body that is disposed axially outside the magnetic field generating device for changing a magnetic flux within a gap between the rotor and a stator in dependence upon an axial position of the body relative to the rotor. The flux changing apparatus includes an adjusting device for axially adjusting the axial position of the body relative to the rotor. The adjusting device includes an actuator and an adjusting element. The actuator acts on the body via the adjusting element. The adjusting element engages the body and / or the actuator in such a manner that a rotational movement of the body can be decoupled from the adjusting element, a housing of the electric machine, the rotor and / or the actuator.

Description

technical field [0001] The invention relates to an electric machine with a flux changer (Flussänderungsvorrichtung) in order to limit the induced voltage. Background technique [0002] In the case of conventional operation of variable-speed electric machines (eg synchronous machines), the voltage available for the supply (Speisung) can be limited by the inverter upper voltage (Umrichterdeckenspannung). Vehicles with electric motors generally have, for example, a DC voltage store and a DC voltage grid, so that in this case the maximum voltage that can be provided at the terminals of the electric motor is determined. The upper limit voltage of the inverter and the maximum phase current (Phasenstrom) can determine the selection of the structural components of the inverter and its cost. Limit ranges with a constant maximum torque and with a constant maximum power can be provided according to the required torque / speed characteristics. If it is implemented that the drive is supp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/28
CPCH02K21/28H02K1/02H02K1/148H02K1/2766H02K7/125H02K21/027H02K21/028H02K21/042H02K21/16H02K41/03H02P25/08
Inventor H.韦尔-布鲁恩R.普利卡特E.H.蒂姆
Owner VOLKSWAGEN AG