A motor magnetic encoder

Abstract

The invention provides a motor magnetic encoder. The motor magnetic encoder comprises an encoder chip U1, a quadrature encoding output module and an instrument signal output module, wherein the quadrature encoding output module is used for enlarging an output voltage range of the encoder chip U1 and improving a current driving capability of the encoder chip U1; the encoder chip U1 comprises two paths of output signals; the two paths of output signals comprise a chip output signal A and a chip output signal B; and the chip output signal A and the chip output signal B pass through the quadrature encoding output module to respectively and correspondingly output a phase-A signal and a phase-B signal and the phase-A signal and the phase-B signal are output to a controller. By adopting the quadrature encoding output module, the output voltage range is enlarged and the current driving capability is improved and the driving of the controller can be met under a large-power condition; and the instrument signal output module is used for increasing one path of rotary speed output signal, so that one path of special rotary speed output signal is provided for vehicle instrument display.

Description

technical field [0001] The invention relates to the technical field of motor encoders, in particular to a motor magnetic encoder. Background technique [0002] The magnetic encoder chip has the advantages of high integration and simple peripheral circuit, and is widely used in the detection and control of the position and speed of certain components in the field of industrial control. However, if the magnetic encoder chip is directly used, its output voltage is generally 0-5V, and the driving current is relatively small, only about 20mA, which cannot drive a controller with large power consumption. [0003] In addition, when used in a car, one of the driving signals output by the magnetic encoder is directly fed back to the car meter. When a fault occurs, the car meter cannot display normally, and the circuit of the car meter is more complicated. Contents of the invention [0004] The technical problem to be solved by the present invention is: in order to overcome the dis...

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Problems solved by technology

However, if the magnetic encoder chip is directly used, its output voltage is generally 0-5V, and the driving current is relatively small, only about 20 mA, which cannot drive a controller with a large power consumption.

[0003] In addition, when used in automobiles, one of the driving signals output by the magnetic encoder is directly fed back to the car instrument. When a fault occurs, the car instrument cannot display normally, and the circuit of the car instrument is more complicated.

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