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Load torque detection circuit based on armature current and rotation speed signal

A technology of speed signal and load torque, which is applied in the direction of motor generator testing, components of electrical measuring instruments, and measuring electricity. Low, high reliability, small size effect

Active Publication Date: 2017-12-19
北京中知中科技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is that it cannot detect the load torque and time-varying load torque in the dynamic process of speed change. In addition, in technical reality, it generally requires a high-performance CPU, which has a complex structure and high cost.

Method used

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  • Load torque detection circuit based on armature current and rotation speed signal
  • Load torque detection circuit based on armature current and rotation speed signal
  • Load torque detection circuit based on armature current and rotation speed signal

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the drawings.

[0012] Such as figure 1 As shown, the load torque detection circuit based on armature current and speed signals includes a torque signal processing circuit and a load selection circuit.

[0013] The torque signal processing circuit includes connectors CN1, current amplifier IC1, torque amplifier IC2, speed follower IC3, differential amplifier IC4, load follower IC7, upper input resistance R1, upper feedback resistance R2, upper ground resistance R3, upper negative Terminal resistance R4, upper output resistance R5, upper positive terminal resistance R6, lower input resistance R7, proportional resistance R8, differential resistance R9, filter resistance R10, balance resistance R11, current limiting resistance R12, lower positive terminal resistance R13, upper filter capacitor C1, lower filter capacitor C2, differential capacitor C3, positive power supply capacitor C7, negative power supp...

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Abstract

The invention relates to a load torque detection circuit based on armature current and a rotation speed signal. The circuit comprises a torque signal processing circuit and a load selection circuit. Specifically, a current detection signal end of a connector is connected to one end of an upper input resistor, the other end of the upper input resistor is connected to a negative input end of a current amplifier, an output end of a torque amplifier is connected to an electromagnetic torque signal end of the connector, a rotation speed detection signal end of the connector is connected to one end of a lower input resistor, the other end of the lower input resistor is connected to a positive input end of a rotation speed follower, an output end of a differential amplifier is connected to one end of a current limiting resistor, an output end of a forward comparator is connected to an output end of a reverse comparator, and an output end of a load follower is connected to a load torque signal end of the connector. The circuit is suitable for an application occasion of carrying out real-time detection of a mechanical load torque of a DC motor. The circuit has the advantages of high real-time performance, a small volume, low cost, good universality, high reliability, and easy implementation in a chip.

Description

Technical field [0001] The invention belongs to the field of industrial measurement and control, and relates to a circuit, in particular to a load torque detection circuit based on armature current and speed signals, and is suitable for real-time detection of the mechanical load torque of a DC motor. Background technique [0002] Mechanical load torque (also called torque) is an important parameter in the electromechanical system, especially for the operation and control performance of the electromechanical equipment controlled by the DC motor. However, the existing electromechanical systems are unable to transfer dynamic and static loads. Real-time monitoring of moments restricts the improvement of the measurement and control performance of the electromechanical system. Therefore, how to detect the load torque in real time is an important prerequisite for improving the performance of the electromechanical system. The existing common methods are only for the steady load torque. ...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01R1/30
CPCG01R1/30G01R31/343
Inventor 陈德传杨波张凯楠
Owner 北京中知中科技术开发有限公司
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