Encoder power supply dynamic compensation device and method

Abstract

The invention relates to the technical field of encoders, and discloses an encoder power supply dynamic compensation device and method. In the embodiment of the invention, the encoder power supply dynamic compensation device comprises an encoder circuit module and an encoder. The encoder circuit module and the encoder form a closed-loop circuit through a cable, and the closed-loop circuit comprises an output voltage provided by the encoder circuit module, an input voltage received by the encoder and a feedback voltage which is received by the encoder circuit module and generated by feedback executed by the encoder according to the input voltage. The encoder circuit module adjusts the output voltage of the closed-loop circuit according to the magnitude relationship between the feedback voltage and a preset reference voltage. Compared with the prior art, according to the embodiment of the invention, the output voltage of the encoder circuit module is flexibly adjusted by detecting the feedback voltage and controlling the closed-loop circuit, so that the dynamic compensation of the input voltage of the encoder is realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of encoders, in particular to a dynamic compensation device and method for an encoder power supply. Background technique [0002] As a key component of speed and position feedback, encoders are commonly used in the case of motor drives. When the encoder is applied, it is installed on the motor body, the motor driver and the encoder are connected through a cable, and the motor driver supplies power to the encoder. [0003] The inventor found that one of the challenges often encountered in this application is that the cable of the encoder is relatively long, and there are many sites with a cable length of more than 100m, and because the material of the cable is different, the impedance is also different, and the code will appear. The input voltage of the encoder is low, which seriously affects the normal operation of the encoder. Since the encoders on site are random, the current co...

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Problems solved by technology

[0003] The inventor found that one of the challenges often encountered in this application is that the cable of the encoder is relatively long, and there are many sites with a cable length of more than 100m, and because the material of the cable is different, the impedance is also different, and the code will appear. The input voltage of the encoder is low, which seriously affects the normal operation of the encoder.

Since the encoders on site are random, the current consumption is not easy to determine, and the cable length is also uncertain

At present, the general practice in the industry is to give a specific voltage value. If the encoder voltage does not meet the requirements on site, the encoder power supply can be realized by temporarily modifying the circuit and increasing the output voltage of the power supply. This method requires manual real-time monitoring on site. Supervision will bring a large labor cost, and at the same time modifying the circuit may easily bring safety hazards

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