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Optical encoder signal input circuit and frequency converter including optical encoder signal input circuit

A signal input circuit, optical encoder technology, applied in the field of frequency converters, can solve problems such as user misoperation

Pending Publication Date: 2018-02-16
BOSCH REXROTH (XIAN) ELECTRIC DRIVES & CONTROLS CO LTD XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method may have serious consequences due to user misuse

Method used

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  • Optical encoder signal input circuit and frequency converter including optical encoder signal input circuit
  • Optical encoder signal input circuit and frequency converter including optical encoder signal input circuit
  • Optical encoder signal input circuit and frequency converter including optical encoder signal input circuit

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Embodiment Construction

[0031] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to only the embodiments set forth herein. The above-mentioned embodiments are given to make the disclosure of this document comprehensive and complete, so as to make the understanding of the protection scope of the present invention more comprehensive and accurate.

[0032] Words such as "comprising" and "comprising" mean that in addition to the units and steps that are directly and explicitly stated in the specification and claims, the technical solution of the present invention does not exclude other elements that are not directly or explicitly stated. Situation of units and steps.

[0033] Words such as "first" and "second" do not denote the order of elements in terms of time, space, size, etc. but are me...

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Abstract

The invention relates to a power electronic technology, in particular to an optical encoder signal input circuit and a frequency converter including the input circuit. The optical encoder signal inputcircuit (30) according to one embodiment of the invention comprises an adaptive unit (320), a current limiting unit (330) and a photoelectric coupling unit (340), wherein the adaptive unit (320) is configured to be capable of converting a bipolar pulse signal from an optical encoder signal into a unipolar pulse signal; the current limiting unit (330) is coupled with the adaptive unit (320), and configured to convert the unipolar pulse signal into a signal with a limited current amplitude; and the photoelectric coupling unit (340) is coupled with the current limiting unit (330), and configuredto convert the signal with the limited current amplitude into an output signal suitable for processing by the frequency converter.

Description

technical field [0001] The invention relates to power electronics technology, in particular to an optical encoder signal input circuit and a frequency converter containing the input circuit. Background technique [0002] The frequency converter is a power control device that uses frequency conversion technology to control the AC motor by changing the operating frequency of the motor. The frequency converter mainly includes components such as rectification and filtering unit, inverter unit, drive unit and control unit. The frequency converter provides variable-frequency voltage to the motor by controlling the on-off of switching devices such as insulated gate bipolar transistors (IGBT) in the inverter unit, thereby realizing speed regulation and torque control. [0003] In the process of speed regulation and torque control, it is necessary to obtain the motor speed as a feedback signal. Typically, an optical encoder is used to measure the motor speed and provide it to the f...

Claims

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Application Information

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IPC IPC(8): H03K11/00H02M1/08H02P27/04
CPCH02P27/045H03K11/00
Inventor 罗斌向礼
Owner BOSCH REXROTH (XIAN) ELECTRIC DRIVES & CONTROLS CO LTD XIAN
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