Decoding device of sine and cosine encoder, driving device and parameter determination method thereof

Abstract

The invention discloses a decoding device of a sine and cosine encoder, driving equipment and a parameter determination method thereof, and the device comprises the components of a sine and cosine encoder which detects rotor position information of a motor and outputs a sine and cosine differential signal; the differential operational amplifier unit is used for carrying out differential operational amplifier processing on the sine and cosine differential signal to obtain a sine and cosine analog signal; the sine and cosine analog signals are divided into two paths; the interlaced triggering unit is used for performing interlaced triggering on a sine signal and a cosine signal in the first path of sine and cosine analog signal to obtain a sine and cosine square wave signal; the ADC unit is used for performing analog-to-digital conversion processing on the second path of sine and cosine analog signal to obtain a sine and cosine digital signal; and the control unit determines rotor position information of the motor according to the sine and cosine square wave signals and the sine and cosine digital signals. According to the scheme, the influence of interference on pulse counting is eliminated by using the interlaced trigger unit, so that the accuracy of the angular position information of the motor acquired by the servo driver is improved, and the control precision of the servo driver is improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a decoding device for a sine and cosine encoder, a driving device and a parameter determination method thereof, and in particular to a sine and cosine encoder decoding circuit capable of anti-interference, which has the A driving device (such as a frequency converter, a servo driver, a motor controller, etc.) of a circuit, and a method for determining parameters of the driving device. Background technique [0002] In the servo system with high precision and high dynamic performance requirements, the position and speed of the rotor in the motor must be measured in real time and accurately. Sincos encoders are widely used in scientific and technological fields such as precision measurement and real-time control due to their high resolution and high precision. [0003] In the related scheme, the angular position information (such as motor angular position, angular...

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Problems solved by technology

[0006] The object of the present invention is to provide a decoding device for a sine-cosine encoder, a driving device and a method for determining its parameters, so as to solve the problem of the alternating current of the switching power supply, power module, power transmission line, and motor in the servo drive of the servo drive device. Interference is generated, and the sine-cosine encoder will cause pulse count errors due to these interferences, which will lead to a large deviation in the angular position information of the motor obtained by the servo drive, which affects the control accuracy of the servo drive. By improving the sine-cosine encoder decoding circuit Anti-interference performance to eliminate the influence of interference on pulse counting, thereby improving the accuracy of the angular position information of the motor obtained by the servo drive, and improving the control accuracy of the servo drive

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