Application Cases

Torque Exciters are devices attached to certain machinery and equipment to generate excitatory forces and are important components utilizing mechanical vibrations. Exciters can impart specific forms and magnitudes of vibration to objects, thereby conducting vibration and strength tests on objects or calibrating vibration testing instruments and sensors. Exciters can also serve as excitatory components in vibrating machinery to achieve tasks such as conveying, screening, compacting, forming materials or objects, and tamping soil and gravel. Depending on the type of excitation, exciters are categorized into inertial, electric, electromagnetic, electrohydraulic, pneumatic, and hydraulic types. Exciters can produce unidirectional or multidirectional, harmonic or non-harmonic excitatory forces.

ATA-3000 Series Power Amplifiers from Aigtek can provide an AC voltage of up to 100Vpp and a current of 20Ap. They can apply AC superimposed on DC signals to create an experimental environment, observe the vibration amplitude and rotational speed of the motor under different currents, and then adjust the frequency to observe the vibration amplitude and rotational speed of the motor under different frequencies.

Experiment Name: Study of Torque Exciters Driven by Direct Current Brushed Motors

Experiment Principle: The signal source provides a DC superimposed on an AC signal to excite the motor through the ATA-3090B power amplifier. The voltage and frequency applied to the motor are monitored using an oscilloscope to observe the motor's rotational speed and fluctuating torque and vibration amplitude under different frequencies, serving as a fundamental study for torque exciters.

Testing Equipment: High-voltage amplifier, signal generator, oscilloscope, etc.

Figure: Block Diagram of the Experimental System

Experiment Process:

A signal generator outputs a 1Vpp AC signal superimposed on a 3V DC signal, a sine wave at a frequency of 10Hz, which is then amplified by the ATA-3090B. The vibration amplitude and rotational speed of the motor under different currents are observed, and then the frequency is adjusted to observe the vibration amplitude and rotational speed of the motor under different frequencies.

Experimental Results:

The vibration effect of the motor is weaker as the frequency approaches 50Hz and more pronounced at lower frequencies. The higher the DC signal, the higher the motor's rotational speed.

Role of the Power Amplifier: To provide a current of 10Ap and a high stability, low-distortion AC superimposed on DC signal to drive the direct current brushed motor.

Figure: Specification Parameters of the ATA-3000 Series Power Amplifiers

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