Integrated soft detection circuit for speed and torque based on armature voltage and current signals

Abstract

The invention discloses an integrated rotating speed-torque soft detection circuit based on an armature voltage and a current signal. The integrated rotating speed-torque soft detection circuit comprises a rotating speed signal processing circuit, an integrated torque signal processing circuit, and a load type selection circuit. A current detection signal terminal of a connection element is connected with one end of an upper input resistor; the other end of the upper input resistor is connected with a positive input terminal of a current follower; a voltage detection signal terminal of the connection element is connected with one end of a lower input resistor; the other end of the lower input resistor is connected with a negative input terminal of a voltage amplifier; an output terminal of an armature amplifier is connected with a rotational speed output signal terminal of the connection element; an output terminal of a torque amplifier is connected with an electromagnetic torque signal terminal of the connector; and an output terminal of an analog switch is connected with a load torque signal terminal of the connection element. The integrated rotating speed-torque soft detection circuit is suitable for an application occasion for real-time soft detection on the rotating speed and mechanical load torque of a direct-current motor. The soft detection circuit has advantages of good real-time performance, small size, low cost, and high universality and reliability and is easy to chip realization.

Description

technical field [0001] The invention belongs to the field of industrial measurement and control, and relates to a circuit, in particular to a comprehensive soft detection circuit for rotational speed and torque based on armature voltage and current signals, which is suitable for real-time soft detection of the rotational speed and mechanical load torque of DC motors application occasions. Background technique [0002] The speed of motion and load torque (also called torque) of rotating machinery are important parameters in electromechanical equipment systems. In many applications, the end of the motion mechanism (controlled point) is equipped with speed and position sensors, and the motor shaft The speed on the motor shaft is an intermediate variable. Due to installation reasons or requirements for miniaturization and optimized structure, it is hoped that the speed control can be realized without installing a speed sensor on the motor shaft. Furthermore, the real-time soft d...

AI Technical Summary

Problems solved by technology

The existing common method is only for the steady load torque, according to the relationship between the electromagnetic torque and the load torque when the DC motor is running at a steady speed, and the relationship between the electromagnetic torque and the armature current is proportional, by detecting the steady-state armature current In order to obtain the steady-state load torque, its main disadvantage is that it cannot detect the load torque and time-varying load torque in the dynamic process of shifting.

In terms of speed soft detection, it is also based on the steady-state armature circuit voltage balance relationship, and the dynamic accuracy is poor.

In addition, high-performance CPUs are used in technical reality, with complex structures and high costs.

Images