CN102401665A - New motor magnetic encoder - Google Patents

Abstract

The invention discloses a new motor magnetic encoder, wherein the motor magnetic encoder, comprising a permanent magnet for generating a radial magnetization of the sinusoidal magnetic field, an AS5035 chip, an AM26C31 chip, an HEADER5 module and an HEADER8 module, wherein the permanent magnet is fixed at top end of the motor rotary shaft and is arranged on the upper part of the AS5035 chip. The invention has small volume so that the coded disc is unnecessary, and also has high precision angle position information and can output a score checking signal.

Description

A kind of New-type electric machine magnetic coder

Technical field

The present invention relates to a kind of motor magnetic coder.

Background technology

Magnetic coder is a kind of scrambler of using magnetoresistance effect, and being widely used in servomotor, numerically-controlled machine etc. need be with in the device of physical quantity (like rotating speed, corner) with numerical code expression that rotates.Compare with the scrambler of other types, the magnetic coder high frequency characteristics is good, so response speed is fast; Contactless position sensing can perfectly be applied under the rugged environments such as oil, dust, temperature Change is big, because without light emitting diode, so little power consumption, long service life; Simple in structure, shock resistance, reliability is high.In addition, magnetic coder is realized the precise combination of magnetoresistive element easily, than constituting new function element and multifunction device more easily with photoelectric encoder or semiconductor coding device.Therefore, magnetic coder becomes the up-and-coming youngster of scrambler research field in recent years.

Motor encoder is mounted in a kind of sensor that is used for measuring position of magnetic pole and motor corner and rotating speed on the motor; Divide from physical medium; Can be divided into photoelectric encoder and magnetism encoder, traditional photoelectric encoder comes computational accuracy through groove on code-disc, so the high more code-disc of precision will be big more; The volume of scrambler also can be big more, and precision neither be continuous.

Summary of the invention

In order to overcome the above-mentioned deficiency of existing traditional photoelectric encoder, the present invention provides a kind of have differential signal output, the less New-type electric machine magnetic coder of volume.

The technical scheme that the present invention solves its technical matters is: a kind of New-type electric machine magnetic coder, this motor magnetic coder comprise permanent magnet, AS5035 chip, AM26C31 chip, HEADER 5 modules and the HEADER8 module of the diametrical magnetization that can produce sinusoidal magnetic field;

Described permanent magnet is fixed in the top of machine shaft, and this permanent magnet is positioned at the top of said AS5035 chip.

The VDD3V3 pin place of said AS5035 chip installs the buffer capacitor of one 10 μ F additional, and the VDD5V pin of said AS5035 chip installs an electric capacity again additional after connecting positive supply;

The NC pin of said AS5035 chip, OTP_DO pin keep open circuit, and the VSS pin of said AS5035 chip, PROG pin, CSn pin, OPT_CLK pin connect power supply ground;

The A pin of said AS5035 chip, B pin, index pin link to each other with 2 pins, 3 pins, 4 pins of HEADER5 module respectively, to export to the scrambler circuit external to A, B, index pulse signal; The MagINCn pin of said AS5035 chip and MagDECn pin are open-drain output, and use pull-up resistor to be connected on the positive supply of pin VDD5V;

The A pin of said AS5035 chip, B pin, index pin link to each other with 1A pin, 2A pin, the 3A pin of AM26C31 chip respectively again; Input as the AM26C31 chip; Advanced the processing of AM26C31 chip; Output A_1, A_2, B_1, B_2, C_1, C_2 differential signal; These signals link to each other with pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 pins of HEADER8 module via AM26C31 pin of chip 2, pin 3, pin 5, pin 6, pin 10, pin 11 respectively, to scrambler external circuit output differential signal;

Said AM26C31 pin of chip 1, pin 4, pin 7, pin 9, pin 16 connect positive supplies; Said AM26C31 pin of chip 8 connects power supply ground; The pin 5 of said HEADER5 connects positive supply, and the pin 1 of said HEADER5 connects power supply ground, and the pin 1 of said HEADER8 connects power supply ground; The pin 8 of said HEADER8 connects positive supply, and the pin 8 of HEADER8 connects a pull-up resistor simultaneously.

Further, described permanent magnet is positioned at the RC top of said AS5035 chip.

The present invention is through the alnico magnets that produce radial magnetic field are installed on the machine shaft top, and along with the rotation of motor, magnet is around the rotation of AS5035 chip center.Through the processing of the integrated Hall element of AS5035 chip, AFE(analog front end) and DSP, can export A, B, index pulse signal to external circuit, in conjunction with external circuit, can obtain the high precision angle information of motor.Simultaneously, the present invention has used the AM26C31 chip, can export differential signal to external circuit, makes the present invention have the plurality of advantages of differential signal output.

Beneficial effect of the present invention is: code-disc need be set, volume is less, and can obtain the high precision angle information of motor equally, simultaneously the exportable signal of checking the mark.

Description of drawings

Fig. 1 is a schematic diagram of the present invention.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.

With reference to Fig. 1; A kind of New-type electric machine magnetic coder, this motor magnetic coder comprise permanent magnet, AS5035 chip 1, AM26C31 chip 2, HEADER 5 modules 3 (i.e. the connector of 5 pins) and the HEADER8 module 4 (i.e. the connector of 8 pins) of the diametrical magnetization that can produce sinusoidal magnetic field;

Described permanent magnet is fixed in the top of machine shaft, and this permanent magnet is positioned at the top of said AS5035 chip 1.In the present embodiment, described permanent magnet is positioned at the RC top of said AS5035 chip 1.

The VDD3V3 pin place of said AS5035 chip 1 installs the buffer capacitor of one 10 μ F additional, and the VDD5V pin of said AS5035 chip 11 installs an electric capacity again additional after connecting positive supply;

The NC pin of said AS5035 chip 1, OTP_DO pin keep open circuit, and the VSS pin of said AS5035 chip 11, PROG pin, CSn pin, OPT_CLK pin connect power supply ground;

The A pin of said AS5035 chip 1, B pin, index pin link to each other with 2 pins, 3 pins, 4 pins of HEADER5 module 3 respectively, to export to the scrambler circuit external to A, B, index pulse signal; The MagINCn pin of said AS5035 chip 1 and MagDECn pin are open-drain output, and use pull-up resistor to be connected on the positive supply of pin VDD5V; MagINCn and MagDECn pin are open-drain output; Require to connect external pull-up resistor; In order to ensure occurring enough low low level after the power failure of AS5035 chip 1, MagINCn and MagDECn pin pin must use pull-up resistor to be connected on the positive supply of pin VDD5V.

The A pin of said AS5035 chip 1, B pin, index pin link to each other with 1A pin, 2A pin, the 3A pin of AM26C31 chip 2 respectively again; Input as AM26C31 chip 2; Advanced the processing of AM26C31 chip 2; Output A_1, A_2, B_1, B_2, C_1, C_2 differential signal; These signals link to each other with pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 pins of HEADER8 module 4 via pin 2, pin 3, pin 5, pin 6, pin 10, the pin 11 of AM26C31 chip 2 respectively, to scrambler external circuit output differential signal;

The pin 1 of said AM26C31 chip 2, pin 4, pin 7, pin 9, pin 16 connect positive supply; The pin 8 of said AM26C31 chip 2 connects power supply ground; The pin 5 of said HEADER5 connects positive supply, and the pin 1 of said HEADER5 module 3 connects power supply ground, and the pin 1 of said HEADER8 module 4 connects power supply ground; The pin 8 of said HEADER8 module 4 connects positive supply, and the pin 8 of HEADER8 module 4 connects a pull-up resistor simultaneously.

The present invention is through the alnico magnets that produce radial magnetic field are installed on the machine shaft top, and along with the rotation of motor, magnet rotates around AS5035 chip 1 center.Through the processing of integrated Hall element, AFE(analog front end) and DSP of AS5035 chip 1, can export A, B, index pulse signal to external circuit, in conjunction with external circuit, can obtain the high precision angle information of motor.Simultaneously, the present invention has used AM26C31 chip 2, can export differential signal to external circuit, makes the present invention have the plurality of advantages of differential signal output.

Claims (2)

1. New-type electric machine magnetic coder, it is characterized in that: this motor magnetic coder comprises permanent magnet, AS5035 chip, AM26C31 chip, HEADER 5 modules and the HEADER8 module of the diametrical magnetization that can produce sinusoidal magnetic field;

Described permanent magnet is fixed in the top of machine shaft, and this permanent magnet is positioned at the top of said AS5035 chip;

The VDD3V3 pin place of said AS5035 chip installs the buffer capacitor of one 10 μ F additional, and the VDD5V pin of said AS5035 chip installs an electric capacity again additional after connecting positive supply;

The NC pin of said AS5035 chip, OTP_DO pin keep open circuit, and the VSS pin of said AS5035 chip, PROG pin, CSn pin, OPT_CLK pin connect power supply ground;

The A pin of said AS5035 chip, B pin, index pin link to each other with 2 pins, 3 pins, 4 pins of HEADER5 module respectively, to export to the scrambler circuit external to A, B, index pulse signal; The MagINCn pin of said AS5035 chip and MagDECn pin are open-drain output, and use pull-up resistor to be connected on the positive supply of pin VDD5V;

The A pin of said AS5035 chip, B pin, index pin link to each other with 1A pin, 2A pin, the 3A pin of AM26C31 chip respectively again; Input as the AM26C31 chip; Advanced the processing of AM26C31 chip; Output A_1, A_2, B_1, B_2, C_1, C_2 differential signal; These signals link to each other with pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 pins of HEADER8 module via AM26C31 pin of chip 2, pin 3, pin 5, pin 6, pin 10, pin 11 respectively, to scrambler external circuit output differential signal;

Said AM26C31 pin of chip 1, pin 4, pin 7, pin 9, pin 16 connect positive supplies; Said AM26C31 pin of chip 8 connects power supply ground; The pin 5 of said HEADER5 connects positive supply, and the pin 1 of said HEADER5 connects power supply ground, and the pin 1 of said HEADER8 connects power supply ground; The pin 8 of said HEADER8 connects positive supply, and the pin 8 of HEADER8 connects a pull-up resistor simultaneously.

2. New-type electric machine magnetic coder as claimed in claim 1 is characterized in that: described permanent magnet is positioned at the RC top of said AS5035 chip.

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