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Apparatus for correcting offset of current sensor

一种电流传感器、校正电流的技术，应用在电流控制器、用电装置、只测电流等方向，能够解决不能稳定地控制电机、电机脉动、EV不稳定等问题

Active Publication Date: 2016-10-26
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may cause ripples in the output torque output by the motor and thus the motor cannot be stably controlled
Also, if the physical resonance point of the entire system such as an EV is synchronized with the pulsation frequency of the output torque, the EV may become unstable

Method used

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  • Apparatus for correcting offset of current sensor
  • Apparatus for correcting offset of current sensor
  • Apparatus for correcting offset of current sensor

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Embodiment Construction

[0018] The above objects, features and advantages will be described in detail with reference to the accompanying drawings and thus, the technical idea of ​​the present disclosure can be easily implemented by those having ordinary skill in the art to which the present disclosure pertains. Also, when it is determined that a detailed description of related art related to the present disclosure may obscure the gist of the present disclosure, the detailed description thereof will be omitted.

[0019] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The embodiments of the present disclosure may be modified in many different forms and the scope of the present disclosure should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art. ...

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PUM

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Abstract

Disclosed is an apparatus for correcting an offset of a current sensor. The apparatus includes an inverter, a detector, and a RMS calculator, and a controller. The RMS calculator converts the high frequency component extracted from the filter into an effective (RMS) value. The controller, if the effective (RMS) value of the d-axis or q-axis current transformed by the RMS calculator is larger than a preset reference, increases / decreases a currently-set DC offset of each of the current sensors by a certain amount, and replaces the currently-set DC offsets with a DC offset corresponding to a smallest one of the effective (RMS) values of the d-axis or q-axis transformed by the RMS calculator, thereby correcting each of the current sensors. Accordingly, a pulsation in an output torque in controlling an electric motor can be effectively prevented.

Description

technical field [0001] The invention discloses a device for correcting the offset of a current sensor. More specifically, the present disclosure relates to an apparatus for correcting an offset of a current sensor capable of correcting a DC offset of the current sensor when a motor is driven, which may cause a pulsation of the output torque when the current is measured using the current sensor. This shifting method effectively prevents the output torque from pulsating during the process of controlling the motor. Background technique [0002] Currently, hybrid electric vehicles (HEV) and electric vehicles (EV) are attracting attention as environmentally friendly vehicles. In addition to using a conventional internal combustion engine as a power source, HEVs utilize electric motors powered by electricity. [0003] Specifically, an internal combustion engine is used as a main power source, while an electric motor is used as an auxiliary power source by converting DC power fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25H02M1/00
CPCG01R19/25B60L3/0038G01R31/42G01R35/005G01R19/0092G01R31/006B60L2240/529H02P21/22B60L2240/429B60L2260/42B60L50/51Y02T10/64Y02T10/70H02P27/08H02P6/28
Inventor 李铣佑
Owner LSIS CO LTD