功率超声设备中，频率自动跟踪技术是一个重要课题。
It is important that the frequency of ultrasonic generator tracks the transducer mechanical resonance in the power ultrasonic equipment.
采用频率自动跟踪技术来解决信号丢失问题，抑制了各种噪声和干扰。
It tracks the frequency automatically to resolve the dropout of signal and to restrain all kinds of noises and disturbances.
实验结果表明，该电机具有良好的稳定性，利用频率自动跟踪技术对电机转速进行闭环控制，可以将其转速波动稳定在3%之内。
Results show that the motor has good stability. The speed fluctuation is controlled within 3% by the frequency automatic tracking technique.
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