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An encoder zero position signal loss compensation device and method

A technology of zero position signal and compensation device, which is applied in the direction of measuring devices, optical devices to transmit sensing components, instruments, etc., can solve the problems such as Z pulse signal cannot be compensated, and achieve the effect of less cost and lower downtime failure probability

Active Publication Date: 2021-06-22
ZHEJIANG UNIV +1
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Problems solved by technology

The existing technology generally uses DSP to process the speed and detect the Z pulse signal, which cannot compensate the Z pulse signal

Method used

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  • An encoder zero position signal loss compensation device and method
  • An encoder zero position signal loss compensation device and method
  • An encoder zero position signal loss compensation device and method

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] Such as Figure 2-Figure 4 In conjunction with what is shown, the present invention provides a kind of encoder Z pulse loss compensating device 100 for wind power generator and converter system, and it comprises signal interface processing circuit 1, processor 2 (such as CPLD, a kind of Users can construct logic function (programmable...

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Abstract

The invention discloses a compensation device and method for loss of encoder zero position signal. The compensation device is respectively connected with the encoder and the converter; Scale value A pulse signal and B pulse signal; the processor in the compensation device judges whether there is a Z pulse signal at this time, if not, the processor performs Z pulse signal compensation, and automatically generates a Z pulse signal after counting cycles of the zero position signal Z pulse signal is given to the converter. The encoder Z pulse loss compensation method for wind generators and converters of the present invention can reduce the probability of shutdown failure caused by Z pulse loss with less cost.

Description

technical field [0001] The invention relates to the field of wind power generators and converter systems, in particular to a device and method for compensating the loss of an encoder zero position signal (also called Z pulse signal) for the wind power generator and converter systems. Background technique [0002] Speed ​​detection of doubly-fed wind turbine is crucial for motor control. At present, the actual encoder transmits A+, A-, B+, B-, Z+, Z- pulse signals and supplies power to the encoder through an eight-core cable. Among them, the incremental encoder is composed of a grating disk and a photoelectric detection device. When the encoder rotates, due to the existence of the grating, the photoelectric detection device can generate pulse signals A+, A-, B+, B-, Z+, Z-. Among them, the A+ / A-, B+ / B- pulse signals represent the scale of the grating disk, and the continuous pulse output with a phase difference of 90° (0.25 cycle difference) between the two can be used to di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/36G01D5/38G01D5/347
CPCG01D5/3473G01D5/366G01D5/38
Inventor 刘嘉明余诗宝吴立建王海洋崔杰付厚
Owner ZHEJIANG UNIV
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