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

Demagnetization of the rotor of an externally excited synchronous machine

A synchronous motor and rotor technology, which is used in synchronous motors for single-phase current, synchronous motors with stationary armatures and rotating magnets, and AC motor control, etc., can solve problems such as power loss, long demagnetization time, etc. achieve the effect of improving energy efficiency

Pending Publication Date: 2021-03-26
AUDI AG
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages here too, as in option 2, are the long demagnetization times and the loss of available electrical energy

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
  • Demagnetization of the rotor of an externally excited synchronous machine
  • Demagnetization of the rotor of an externally excited synchronous machine
  • Demagnetization of the rotor of an externally excited synchronous machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] figure 1 A circuit diagram of a FSM according to the prior art is shown schematically. Here is a diagram with intermediate circuit capacitor C and switching element S 1 to S 6 circuit, the switching element S 1 to S 6 Drives the stator windings of the FSM. Rotor winding W R The circuit of is connected in parallel with the intermediate circuit capacitor C. The circuit additionally includes switching elements S 7 and S 8 and the diode D 1 and D 2 , by means of which the current flowing through the rotor of the FSM can be adjusted.

[0054] In order to demagnetize the rotor (for example in the event of a collision or other critical driving situation), the following possibilities exist:

[0055] 1. Switch S 7 and S 8 is opened. current then flows through the diode D 1 , intermediate circuit capacitor C and diode D 2 . This continues to charge the capacitor C. An overload of the capacitor C is encountered here. In the worst case, the overload could lead to...

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

The invention relates to a circuit arrangement for demagnetizing a rotor of a separately excited synchronous machine and to a method for operating such a circuit arrangement, comprising at least one switching circuit which is connected to each pole of a rotor winding (WR) of a separately excited synchronous machine, the switching circuit has a diode (D3), a capacitor (CS) arranged downstream of the diode (D3), and a first switch (S9).

Description

technical field [0001] The invention relates to a circuit arrangement for demagnetizing / demagnetizing a rotor of a separately excited synchronous machine and to a method for operating the circuit arrangement. Background technique [0002] In the field of electric motoring, electric machines are usually used for electric traction, usually asynchronous machines (ASM), permanently excited synchronous machines (PSM) or separately excited synchronous machines (FSM). [0003] Separately excited synchronous machines are characterized here in that their rotor is neither a short-circuit cage as in the case of ASM nor an element equipped with permanent magnets as in the case of PSM, but is, briefly, a rotating coil. The current flowing through the coil can be adjusted by corresponding electronics. The current determines the control of the electric motor or the control of the traction of the vehicle. [0004] The regulation of the FSM is usually performed by a pulse inverter (PWR), w...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/022H02M1/34H02J7/34
CPCH02P25/022H02M1/34H02J7/345H02K19/12H02P9/14H01F13/006H02K21/14H02K1/276
Inventor M·席德迈尔S·布鲁塞克
Owner AUDI AG
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com