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Predictive maintenance of the input and output circuit of inverters and power feed-in elements

A technology of intermediate circuits and electrical components, which is applied in the field of predictive maintenance of input circuits and intermediate circuits of inverters and feed power components, and can solve problems such as resistance aging and inaccurate calculations

Inactive Publication Date: 2020-08-21
HEIDELBERGER DRUCKMASHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A disadvantage of the method according to the prior art is that with this method only the aging of electrolytic capacitors can be detected, wherein the ascertainment is also relatively inaccurate, since it assumes a constant resistance value of the precharging resistor, whereas in practice This is not the case as resistors also age over time

Method used

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  • Predictive maintenance of the input and output circuit of inverters and power feed-in elements
  • Predictive maintenance of the input and output circuit of inverters and power feed-in elements
  • Predictive maintenance of the input and output circuit of inverters and power feed-in elements

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Embodiment Construction

[0019] exist figure 1 The direct voltage intermediate circuit depicted in is part of the voltage supply device 1 , wherein the direct voltage intermediate circuit is connected via a rectifier bridge to the conductors L1 , L2 , L3 of the three-phase alternating voltage network. The rectifier bridge also has starting thyristors D1, D2 and a choke coil DR1. The DC voltage intermediate circuit itself has a starting resistor R1, a braking resistor R2 and a braking transistor T1, which is connected to the braking resistor R2. The starting resistor R1 is connected through the relay K1. The DC voltage intermediate circuit also contains an intermediate circuit capacitor C_ZWK, which is required for the charging process. The electronic components D1 , D2 , T1 and the relay K1 are controlled by the control computer 2 . Furthermore, connected to the control computer 2 are a plurality of measuring elements 3 which detect the voltage and current in the direct voltage intermediate circuit...

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Abstract

The invention relates to a method for determining a state and a fault probability of an electrical component in a DC voltage intermediate circuit of a voltage supply device (1) by means of a computer(2) and a measuring element (3). The invention is characterized in that, in the DC voltage intermediate circuit, in a defined operating state of the DC voltage intermediate circuit, a voltage (U_ZWK)and / or a current (I_ZWK) is measured by means of the measuring element (3), as a result of which a current value of the electrical component (R1, R2, C_ZWK) is calculated and stored in the computer (2), and comparing the current value with a corresponding stored value of the electrical component (R1, R2, C_ZWK).

Description

technical field [0001] The invention relates to a method for determining the state and the failure probability of electrical components in a direct voltage intermediate circuit in a voltage supply system by means of a computer and measuring elements. Background technique [0002] Such voltage supply devices are used in many electrical installations and machines, especially in the form of rectifier circuits or inverter circuits as well as converter circuits. The voltage supply device is used in particular to electronically adjust the rotational speed of the electric drive motor. These voltage supply devices have for this purpose a DC voltage intermediate circuit which is supplied with rectified line voltage (Netzspannung) from the AC voltage network and which has a semiconductor bridge circuit on the output side to enable rotational speed The electric drive motor is operated variably. To this end, the voltage supply device has a plurality of electrical and electronic compon...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00G01R31/3278G01R31/40G01R31/64H02M1/36H02M7/155H02M1/0085H02M1/322
Inventor K·科拉尔J·赖特尔R·维尔豪尔M·雅诺恰
Owner HEIDELBERGER DRUCKMASHINEN AG