Apparatus for driving piezoelectric transformers专利检索-压电变压器变压器和转换设备专利检索查询-专利查询网

Apparatus for driving piezoelectric transformers

阅读：285发布：2022-06-30

专利汇可以提供Apparatus for driving piezoelectric transformers专利检索，专利查询，专利分析的服务。并且In apparatus for driving a transducer including a pair of electrodes there are provided a resonance circuit comprised by an inductance and a capacitance connected in parallel and connected across the input electrodes of the transducer, and means for supplying a periodic pulse current of narrow width to the resonance circuit thereby driving the piezoelectric transducer by the energy delivered by the resonance circuit.，下面是Apparatus for driving piezoelectric transformers专利的具体信息内容。

权利要求

1. Apparatus for driving a piezoelectric transformer including a pair of input electrodes, said apparatus comprising: a resonance circuit connected across said input electrodes, said resonance circuit including an inductance and a capacitance which are connected in parallel and said resonance circuit having a resonance frequency equal to or substantially equal to the mechanical resonance frequency or its integer multiple of said piezoelectric transformer; means for supplying periodic current pulses to said resonance circuit at a frequency equal to or substantially equal to said mechanical frequency of said transformer or an integer multiple thereof and at a frequency equal to or less than said frequency of said resonance circuit to cause said resonance circuit to resonate to drive said transformer, said pulse supplying means comprising a switching element having a control electrode and means for applying a periodic pulse current signal to said control electrode to render said switching element periodically conductive at the frequency of said pulse supplying means; and a diode connected between said switching element and said resonance circuit to prevent said switching element from stopping oscillation of said resonance circuit when said switching element is not conducting.

2. The apparatus according to claim 1 wherein said switching element comprises a transistor.

3. The apparatus according to claim 1 including a source of DC to energize said resonance circuit and wherein said diode is connected between said switching element and said resonance circuit with a polarity forward with respect to the polarity of said source.

4. The apparatus according to claim 1 wherein said inductor of said resonance circuit is provided with an intermediate tap which is connected to said switching element through said diode.

5. The apparatus according to claim 1 wherein said means for applying a periodic pulse current signal to the control electrode of said switching element is adapted to apply each pulse in said signal at a time when the output of said resonance circuit is zero or of a polarity opposite to that of said pulse.

6. The apparatus as recited in claim 5 wherein said means for applying a periodic pulse current signal to the control electrode of said switching element controls the width of the pulses in said signal so that the pulses are applied at a time when the output of said resonance circuit is zero or of a polarity opposite to that of said pulse.

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Apparatus for driving piezoelectric transformers

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