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

Protective circuit for intrinsically safe electromagnetic actuators, and protective circuit for intrinsically safe energy supply systems

A technology for protecting circuits and actuators, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, protection against overcurrent, emergency protection devices for automatic disconnection, etc. pulse etc.

Inactive Publication Date: 2006-09-06
CATERPILLER GLOBAL MINING EURO GMBH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in downhole power supply systems with many electromagnetic actuators to be operated simultaneously, the residual energy pulses that interrupt the electrical energy, for example in the event of a cable break or the like, which is reduced by the self-oscillating diodes, can themselves lead to an impermissible according to ignition protection conditions. total pulse

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
  • Protective circuit for intrinsically safe electromagnetic actuators, and protective circuit for intrinsically safe energy supply systems
  • Protective circuit for intrinsically safe electromagnetic actuators, and protective circuit for intrinsically safe energy supply systems
  • Protective circuit for intrinsically safe electromagnetic actuators, and protective circuit for intrinsically safe energy supply systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] exist figure 1An underground, self-safe power supply system is indicated generally in a circuit diagram with the reference numeral 10 . The power supply system 10 comprises a self-safe power supply unit (Netzteil) 1 approved for operation in underground mining as a 12V DC power supply with a first potential 2 at +12V and a second ground conductor Potential 3, hereinafter referred to as GND potential. Both the first 12V potential 2 and the second GND potential 3 are delivered to the downhole power supply system 10 via the branch line 4 or 5 and via the supply line 7 or 8 respectively leading to an electronic controller 6 and via the potential lines 7A, 8A. All electrical consumers9. As consumers, a number of conventional electrohydraulic valves 9 are connected to each electronic controller 6, wherein each electrohydraulic valve 9 comprises a coil 11 as an inductive load and an electromagnetic actuator (Elektromagnetaktor) and at least one coil with A self-oscillating ...

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 present invention relates to a protective circuit ( 30 ) for intrinsically safe electromagnetic actuators operating at the voltage of a power supply approved for underground mining, for switching electrohydraulic valves in underground mining, comprising a coil ( 11 ) connected to a first potential ( 2 ) and a second potential ( 3 ) of the power supply and associated with at least two spaced-apart short-circuit means ( 12 ) connected in parallel with the electromagnetic actuator coil ( 11 ) for short-circuiting the coil in the event of a reversal of the potential of the coil voltage. In accordance with the present invention the protective circuit comprises a semiconductor switch (T3 ) which is inserted between the coil ( 11 ) and the second potential ( 3 ) and, in the event of a voltage reduction or potential reversal, isolates the coil ( 11 ) from the second potential, so that the discharge from the coil ( 11 ) has no adverse effect on the energy supply system or the intrinsic safety.

Description

technical field [0001] The invention relates to a protective circuit for an electromagnetic actuator which is self-safe and can be driven by a voltage from a power supply unit approved for underground mining, said electromagnetic actuator for operating electrohydraulic valves in underground mining, The protective circuit has a coil connected to a first potential and a second potential of the power supply unit, to which coil is assigned at least two short-circuit means formed independently of each other and connected in parallel to the coil of the electromagnetic actuator for The coil is short-circuited when the potential of the coil voltage is reversed. The invention also relates to a protective circuit for self-safe, underground power supply systems, which has a plurality of electronic controllers connected to the power supply lines of a common power supply unit permitted for underground mining, for activating the separately connected Electromagnetic actuators on the control...

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): H02H3/08H02H3/18H02H7/00F16K31/06
CPCH01F7/18H02H3/025H02H9/008H02H9/047
Inventor J·蒂舍特A·松德尔曼
Owner CATERPILLER GLOBAL MINING EURO GMBH
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