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Device for connection to an impedance having a mainly inductive character

A connected, inductive technology, applied in the field of impedance equipment, can solve the problems of driver heating, speed fluctuation, etc., to achieve the effect of reducing the difference, low pulse frequency, and reducing loss

Inactive Publication Date: 2009-02-04
ATLAS COPCO AIRPOWER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to speed fluctuations and electrical losses which in turn lead to undesired heating of the drive

Method used

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  • Device for connection to an impedance having a mainly inductive character
  • Device for connection to an impedance having a mainly inductive character
  • Device for connection to an impedance having a mainly inductive character

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A schematic diagram of a first embodiment of a device 1 according to the invention is shown, wherein the device 1 is connected to a mainly inductive impedance 2 . The device 1 comprises a reactive element designed as an inductive element, more specifically a transformer 3 . The number of windings on the two arms of the transformer 3 is equal so that a voltage transfer equal to 1 is achieved. The transformer 3 has an input terminal, which is used to input the output signal of the power inverter for parallel power supply, and the output signal is controlled by U 1 and U 2 symbolic representation. The first current I 1 Flows through the first winding of the transformer via the first input terminal, while the second current I 2 via the second input terminal with the first current I 1 The opposite direction flows through the second winding of the transformer 3 . Both ends of the first winding have a voltage U L . I 1 and I 2 The sum signal (also referred ...

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Abstract

The invention relates to a device for connection to an impedance (2) having a mainly inductive character. The device comprises a reactive element (3A, 3B, 3C). Furthermore, the device is provided with inputs (V1, V2, W1, W2, V1, V2) for inputting output signals of electric inverters for parallel supply and at least one output for connection to a supply terminal for a phase of the impedance, such that the device is composed to substantially filter out a high-frequency differential component of at least two output signals during use.

Description

technical field [0001] The invention relates to a device for connection to a predominantly inductive impedance, such as an electric motor. Background technique [0002] For example, an electric drive for a compressor is connected via terminals to an electric actuator unit, which actually includes, for example, an inverter. At higher frequencies, the inverter provides high and low voltage and / or current in pulses. Due to the inductance of the electric drive, an average voltage is generated which, under optimum design conditions, is close to the predetermined reference voltage. [0003] However, in addition to the average voltage of the fundamental frequency, which is the result of the switching action of the inverter, voltage components of higher harmonics are also included. The latter voltage components, referred to simply as higher harmonics, induce high-frequency currents in the electric drive as a result of couple variations. This leads to speed fluctuations and electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
CPCH02M7/49H02M7/493H02M1/12H02M1/126H02M1/0064H02M1/123H02P27/02
Inventor G·特罗德
Owner ATLAS COPCO AIRPOWER NV