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Common mode filtering device and transmission including the device

A filter device, common mode inductor technology, applied in output power conversion devices, inductors, fixed inductors, etc., can solve problems such as bulky and expensive, and achieve the effect of reducing cost, increasing length, and reducing the number of coil turns

Active Publication Date: 2011-12-14
SCHNEIDER TOSHIBA INVERTER EUROPE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For transmissions with high power consumption, it is also possible to use a two-stage (fourth-order) filter, but at this time the solution is bulky and expensive

Method used

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  • Common mode filtering device and transmission including the device
  • Common mode filtering device and transmission including the device
  • Common mode filtering device and transmission including the device

Examples

Experimental program
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Embodiment Construction

[0020] refer to figure 1 In the simplified circuit diagram in , the gearbox is used to operate a motor M of synchronous or asynchronous type. The transmission comprises an inverter module 10 connected to an electric machine M via a power cable 19 . For each phase of the motor, the inverter module 10 has two semiconductor power electronic devices of the IGBT (Insulated Gate Bipolar Transistor) type or other components capable of delivering pulsed voltages from the DC voltage bus to the motor M in PWM mode (exist figure 1 In order to simplify, the above components are represented by simple switches).

[0021] The transmission also includes a rectifier module 20 upstream of the inverter module 10 for delivering a DC voltage bus to power the inverter module 10 . A ballast capacitor 29 is located between the rectifier module 20 and the inverter module 10 .

[0022] In a TT network such as a grounded neutral point, the rectifier module 20 is supplied by a three-phase AC voltage ...

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Abstract

Two torus (T1-2) are respectively made from a nanocrystalline, and ferrite materials having different magnetic permeabilities. The saturation induction of the nanocrystalline material is equal to or greater than the saturation induction of the ferrite material. Nanocrystalline material magnetic permeability is equal to or greater than three up to 50000 times the ferrite material magnetic permeability at a frequency of 10 kHz of a current flowing through the windings. This feature prevents the common-mode inductor (LF) from saturating in the resonant frequency range of the filter. An independent claim is included for a speed variator.

Description

technical field [0001] The invention relates to a common mode filter, such as an EMC (Electromagnetic Compatibility) filter, for use at the input of a variable frequency transmission powered by an AC power supply and used to control synchronous or asynchronous motors. The invention also relates to a transmission comprising such a filter device. Background technique [0002] As is well known, variable frequency transmissions include rectifier modules delivering DC voltage from an external AC source. The transmission also includes an inverter module (or chopper) with semiconductor power electronics for chopping the DC voltage in PWM (Pulse Width Modulation) mode so that the pulse-modulated variable voltage and variable The rotational frequency of the motor is passed as an output to the motor. In order to be able to operate the motor in PWM mode with a suitable variable voltage, the transmission control device turns on and off the semiconductor devices at a sampling frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/12
CPCH03H1/0007H01F17/062H03H7/427H02M1/44H02M2001/123H02M1/40H01F3/10H01F2017/0093H02M1/123
Inventor 让·拉方丹
Owner SCHNEIDER TOSHIBA INVERTER EUROPE SAS