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

Electronic intermediate DC circuit

A DC intermediate circuit and electronic technology, applied in the direction of AC motor control, high-efficiency power electronic conversion, electrical components, etc.

Inactive Publication Date: 2011-03-16
VORWERK & CO INTERHOLDING GMBH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the instantaneous value of the supplied mains sinusoidal voltage now rises above this voltage level again, the capacitor starts to recharge, which leads to a non-sinusoidal current jump in the energy supply network

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
  • Electronic intermediate DC circuit
  • Electronic intermediate DC circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The circuit is configured to supply an electric motor 1 (here polyphase) from an energy supply network 2 into which a DC intermediate circuit 3 is inserted.

[0010] A rectifier bridge 5 consisting of diodes 4 serves as the initial stage for the sinusoidal voltage of the mains supply. The two capacitors 6 and 7 connected in parallel are provided by the two-way bridge rectifier. Capacitor 6 is a film capacitor with a low capacitance of a few microfarads. An electrolytic capacitor is provided as the second capacitor 7 . Capacitor 7 has a significantly higher capacitance than capacitor 6 . It is several microfarads, such as 500 μF.

[0011] The two capacitors 6 and 7 are connected to each other via a blocking diode 8 in such a way that, seen from the supply side, only the film capacitor 6, which forms the input capacitor, is active, the capacitor 6 has a small capacitance, and the harmonic From the point of view of wave standards, this capacitance is not critical. The...

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 an electronic intermediate DC circuit which is to be used in brushless electric motors (1) such as reluctance motors and comprises a rectifier bridge (5) composed of diodes (4) and a capacitor that is connected downstream from the rectifier bridge (5). In order to improve the design of a circuit of said type in a structurally simple manner, two capacitors (6, 7) which have different capacities are connected downstream from the rectifier bridge (5).

Description

technical field [0001] The invention relates to an electronic DC intermediate circuit for use with a brushless motor such as a reluctance motor, comprising a rectifier bridge consisting of diodes and a capacitor connected downstream of the rectifier bridge, the two capacitors being connected downstream of the rectifier bridge , and the two capacitors have different capacitances. Background technique [0002] In the case of brushless motors such as reluctance motors (which are further used in household appliances such as household vacuum cleaners), the power supply is influenced by a DC intermediate circuit. A passive DC bridge is used as the initial stage of the mains sine wave voltage, which charges the electrolytic capacitor bank to the peak value of the input voltage. This intermediate circuit can act as an energy store from which the electric motor draws energy via the rectifier and to which the electric motor can also return its freewheel energy. Harmonics in the ener...

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): H02P25/08H02P25/04H02M1/42
CPCY02B70/126H02P25/04H02P25/08H02M1/4208Y02B70/10
Inventor 冈特·波彭尤维·考尔德维托斯滕·兰
Owner VORWERK & CO INTERHOLDING GMBH