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

Power supply unit having an off-delay switching circuit

A technology for power supply units and switching elements, applied in the direction of electrical components, electronic switches, output power conversion devices, etc.

Active Publication Date: 2010-08-18
INTERDIGITAL CE PATENT HLDG
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if the unit is completely shut off with the mains switch, then specific circuit components must be present to keep the fan running long enough

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
  • Power supply unit having an off-delay switching circuit
  • Power supply unit having an off-delay switching circuit
  • Power supply unit having an off-delay switching circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] FIG. 1 shows a circuit arrangement in this exemplary embodiment with a first power supply unit I, a mains switch S1 and a switching element, namely a relay R1. The power supply unit I is supplied in known manner with a DC (direct current) voltage U+ by a rectifier BR connected to the mains terminal NA, for example a bridge rectifier, which DC, given a mains alternating (AC) voltage of 230 volts, The voltage is close to 300 volts. Arranged between the rectifier BR and the mains terminal NA is a power factor coil LS for power factor correction. In this case, a power factor coil LS can be arranged in the mains voltage feed line and in the mains voltage return line. However, it is also possible to arrange a power factor coil LS between the rectifier BR and the storage capacitor connected to the downstream unit.

[0017] The rectifier BR also supplies the supply voltage U+ to the second supply unit II and the third supply unit III. In this case, the first power supply uni...

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 circuit arrangement has a power supply unit (I, II, III), a mains switch (S1) and a switching element (Rl), for example a relay, that bridges a first switching contact (1) of the mains switch (S1). A load (L) is coupled to a control terminal (4) of the switching element (R1), so that when the control voltage (US) is turned off for the purpose of opening the switching element (R1), the load (L) is simultaneously turned off. The circuit arrangement contains a microprocessor (UP), in particular, which is supplied with an operating voltage (U1) by the power supply unit (I), and which is coupled to the control terminal (4) of the switching element (R1) for control of the switching element (R1). The load (L) is a fan, for example, which is switched off in a delayed manner when the circuit arrangement is switched off by means of the mains switch (S1).

Description

technical field [0001] The invention is based on a circuit arrangement with a power supply unit, a mains switch and with a switching element bridging a first switching contact of the mains switch. Circuit arrangements of this type are used, for example, in devices belonging to consumer electronics. Background technique [0002] For equipment with relatively high power consumption, specific regulations on harmonic currents of the mains supply have been applied simultaneously in many countries. In this case, the harmonic load of the electrical mains generated by the equipment can be regulated by the so-called power factor. Specifically, in the case of switched-mode power supply units without corresponding circuit measures for improving the power factor, the switched-mode power supply unit generates a strong pulsed load of the mains supply, resulting in the generation of harmonic currents in the mains supply. [0003] Switch-mode power supply units with high power factor are ...

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 Patents(China)
IPC IPC(8): F04D25/08H03K17/28
CPCF04D25/08H02M1/16
Inventor 沃尔夫冈·赫多曼迈克尔·迈茨纳让-保罗·卢维尔
Owner INTERDIGITAL CE PATENT HLDG