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Method for determining phase currents of inverter, equipment and vehicle

A phase current and inverter technology, applied in the direction of converting AC power input to DC power output, electrical components, AC motor control, etc., can solve problems such as limiting output

Pending Publication Date: 2022-02-18
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, phase current determination is no longer possible from a determined output, thereby limiting the output

Method used

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  • Method for determining phase currents of inverter, equipment and vehicle
  • Method for determining phase currents of inverter, equipment and vehicle
  • Method for determining phase currents of inverter, equipment and vehicle

Examples

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Embodiment Construction

[0026] The example set forth below is a preferred embodiment of the invention. In the present exemplary embodiment, the described components of this embodiment are each individual features of the invention that are to be considered independently of one another, which in each case also expand the invention independently of one another and can therefore also be used alone or in combination with the illustrations. Combinations different from the ones listed are considered to be part of the invention. Furthermore, the described embodiments can also be supplemented by other already described features of the invention.

[0027]In the figures, functionally identical elements are provided with the same reference symbols.

[0028] figure 1 The inverter is shown. The inverter 1 of the device 2 can have a DC voltage bus 3 which can be electrically conductively connected to a DC power source 4 , and the inverter 1 can be configured to provide a multiphase current I2 at a multiphase bu...

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Abstract

The invention relates to a method for determining phase currents of an inverter (1), in which an input DC voltage applied to a DC voltage bus (3) of the inverter (1) is repeatedly modulated by means of pulse width modulation by means of the inverter (1) in order to generate a multi-phase current (I2) comprising at least three phases with respective phase currents. During a modulation period of the pulse width modulation, at least two phase current values are measured by a current measuring device (7) of the inverter, and the at least three phase currents are determined from the at least two phase current values by a control unit. According to the invention, a respective replacement phase current value is determined by the control unit (9) on the basis of the phase current of at least one preceding modulation cycle by means of a predetermined mathematical model, and the respective replacement phase current value is assigned to the respective phase current when the measurement of at least two of the phase current values of the modulation cycle is determined to be incorrect.

Description

technical field [0001] The invention relates to a method for determining phase currents of an inverter, a device for determining phase currents of an inverter, and a vehicle having the device. Background technique [0002] Motors are typically driven with three-phase current. The magnetic flux density and torque are adjusted by corresponding phase currents of the three-phase currents. In this case, the corresponding phase currents flow through the corresponding coils of the electric machine. The three-phase current is supplied by an inverter, which is also called a converter or a rotary rectifier. An intermediate circuit is attached to the inverter, which intermediate circuit connects the DC voltage source to the input voltage bus of the inverter. Therefore, the inverter is connected to a positive input potential and a negative input potential. The multiphase current is supplied to the multiphase bus of the inverter, wherein the corresponding phase is assigned to the cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02M7/5395H02M7/5387
CPCH02P27/085H02M7/5395H02M7/53871
Inventor M·莱布A·米斯特雷克J·劳默
Owner VTESCO TECH GMBH
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