CN221127151U - Circuit for driving piezoelectric ceramics to work - Google Patents
Circuit for driving piezoelectric ceramics to work Download PDFInfo
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- CN221127151U CN221127151U CN202322689185.9U CN202322689185U CN221127151U CN 221127151 U CN221127151 U CN 221127151U CN 202322689185 U CN202322689185 U CN 202322689185U CN 221127151 U CN221127151 U CN 221127151U
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- 239000003990 capacitor Substances 0.000 claims description 31
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- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
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Abstract
The utility model relates to a circuit for driving piezoelectric ceramics to work, which comprises a main control unit, a switching power supply module, a voltage boosting circuit and a residual electricity bleeder circuit, wherein the switching power supply module is configured to receive a control signal of the main control unit and transmit a power supply control voltage to the voltage boosting circuit; when the residual electricity bleeder circuit receives the piezoelectric ceramic working voltage, the residual electricity bleeder circuit transmits the piezoelectric ceramic working voltage to the piezoelectric ceramic load circuit, and when the residual electricity bleeder circuit does not receive the piezoelectric ceramic working voltage, the residual electricity bleeder circuit is closed to stop transmitting the voltage; on the basis of realizing the PZT driving function, the power supply control is added, so that the product can be controlled more simply and conveniently, and the miniaturization and portability of the product are further improved.
Description
Technical Field
The utility model relates to a micro-driving element driving circuit, in particular to a circuit for driving piezoelectric ceramics to work.
Background
Piezoelectric ceramics are used as a micro-driving element and are functional ceramic materials for mutually converting mechanical energy and electric energy; the piezoelectric ceramic driving power supply is made by using the characteristics that the material is polarized due to the relative displacement of positive and negative charge centers inside the material under the action of mechanical stress, so that bound charges with opposite signs appear on the surfaces of two ends of the material, namely a piezoelectric effect, and has sensitive characteristics, so that the piezoelectric ceramic driving power supply has the characteristics of small output ripple voltage, high output voltage, rapid discharge of capacitive load, controllable power supply voltage and the like.
The driving power supply circuit commonly used in the market at present has a complex structure and a large volume (as in patent CN206835010U, CN 110401375A); or the input power is alternating current, and the volume is further increased after the transformer is used (as in patent CN113193765A, CN 110401375A). The large-volume heat-generating device can generate large heat, so that the large-volume heat-generating device cannot be integrated in a miniaturized low-voltage input product, and is easy to generate quality change due to heat.
Disclosure of utility model
The utility model aims to provide a circuit for driving piezoelectric ceramics to work, which reduces the requirement on the use environment on the basis of realizing the driving function and realizes the miniaturization of products.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
The utility model provides a circuit for driving piezoelectric ceramics to work, which comprises a main control unit, a switching power supply module, a booster circuit and a residual electricity bleeder circuit, wherein
The switch power supply module is configured to receive a control signal of the main control unit and transmit a power supply control voltage to the boost circuit;
The booster circuit is configured to receive the power supply control voltage and boost the power supply control voltage to the piezoelectric ceramic working voltage, and an output end of the booster circuit is configured to output the piezoelectric ceramic working voltage to the residual electricity bleeder circuit;
The residual electricity bleeder circuit is configured to transmit the piezoelectric ceramic working voltage to the piezoelectric ceramic load circuit when the piezoelectric ceramic working voltage is received, and is closed to stop transmitting the voltage when the piezoelectric ceramic working voltage is not received.
Preferably, the switch power supply module comprises an NMOS transistor and a PMOS transistor, wherein the G pole of the NMOS is connected with the input end of the main control unit, the D pole of the NMOS is connected with the G pole of the PMOS transistor, the G pole of the PMOS transistor is connected with a power supply of a circuit for driving the piezoelectric ceramics to work through a capacitor, the S pole of the PMOS transistor is also connected with the power supply of the circuit for driving the piezoelectric ceramics to work, and the D pole of the NMOS transistor is connected with the output end of the switch power supply module.
Preferably, the switching power supply module comprises an NPN-type transistor and a PMOS transistor, wherein the base electrode of the NPN-type transistor is connected with the input end of the main control unit, the collector electrode of the NPN-type transistor is connected with the G electrode of the PMOS transistor, the G electrode of the PMOS transistor is connected with a power supply of a circuit for driving the piezoelectric ceramics to work through a capacitor, the S electrode of the PMOS transistor is also connected with the power supply of the circuit for driving the piezoelectric ceramics to work, and the D electrode of the NPN-type transistor is connected with the output end of the switching power supply module.
The boost circuit comprises a first input filter capacitor which is arranged in parallel, the output end of the first input filter capacitor is connected with the input end of a first boost control component, the first boost control component is configured to receive the voltage output by the first input filter capacitor and output a switching signal to the control end of a switching tube, the input end of the switching tube is connected with an inductor, the output end of the switching tube is connected with the positive electrode of a first freewheeling diode, the negative electrode of the first freewheeling diode is connected with an output filter capacitor, and the filter output capacitor is connected with a divider resistor in parallel.
The boost circuit comprises a second input filter capacitor which is arranged in parallel, the input end of the boost circuit is sequentially connected with the second input filter capacitor and a second boost control component, the output end of the second boost control component is connected with the positive electrode of a second freewheeling diode, the negative electrode of the second freewheeling diode is connected with the output end of the boost circuit, the output end of the boost circuit is connected with an output filter circuit in parallel, and the positive electrode of the second freewheeling diode is also connected with a boost inductor.
The bleeder circuit comprises a PNP type tertiary pipe and a diode, wherein the input end of the bleeder circuit is connected with the base electrode of the PNP type tertiary pipe through a resistor, and is connected with the emitter through a forward diode and a piezoelectric ceramic load circuit.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
The circuit comprises a control unit and a boost unit, wherein the control unit comprises a main control unit and a switch power supply module, the boost unit comprises a boost circuit and a residual electricity rapid bleeder circuit, an output signal is controlled to the switch power supply module through the main control unit, the switch power supply module transmits the square wave signal to the boost circuit, and when receiving the square wave signal, the boost circuit is started, otherwise, the boost circuit is closed; the voltage boosting circuit boosts the power supply control voltage to the piezoelectric ceramic working voltage, so that the voltage boosting effect is realized; the residual electricity quick release circuit converts electric energy into heat energy or other forms of energy through a simple energy conversion principle, and when the piezoelectric ceramic load circuit is normally discharged, the voltage used by the piezoelectric ceramic load circuit is transferred to a ceramic plate, and when a power supply is closed, the circuit is rapidly disconnected, and the working circuit does not transmit voltage to the piezoelectric ceramic load circuit any more, so that the condition that the voltage drop is slow due to a large capacitance in the load circuit, and the circuit cannot be normally reset due to the fact that the circuit is opened again can be avoided. Meanwhile, on the basis of guaranteeing the function of driving the piezoelectric ceramic load circuit, the power supply control is added, so that the product can be controlled more simply and conveniently, and the miniaturization and portability of the product are further improved.
Drawings
Some specific embodiments of the utility model will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic block diagram of an embodiment of the present utility model;
fig. 2 is a circuit diagram of the switch circuit module in embodiment 1, embodiment 3, embodiment 4 of the present utility model;
Fig. 3 is a circuit diagram of a switch circuit module in embodiment 2 of the present utility model;
Fig. 4 is a circuit diagram of the booster circuits of embodiment 1, embodiment 2 and embodiment 4 of the present utility model;
Fig. 5 is a circuit diagram of a booster circuit according to embodiment 3 of the present utility model;
fig. 6 is a circuit diagram of the residual current circuit module of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
As shown in fig. 1, the utility model comprises a control unit and a boost unit, wherein the control unit comprises a main control unit and a switching power supply module, and the boost unit comprises a boost circuit and a residual electricity rapid bleeder circuit. The switch power supply module receives a control signal of the main control unit, the control signal and the frequency of the main control unit transmit a start signal and a power supply control voltage to the switch power supply module, the switch power supply module transmits the power supply control voltage to the booster circuit after receiving the control signal, the booster circuit boosts the power supply control voltage to the piezoelectric ceramic working voltage, and the booster circuit drives the piezoelectric ceramic load circuit through the residual electricity bleeder circuit after boosting the piezoelectric ceramic working voltage. When the circuit is normally input, the residual electricity bleeder circuit inputs the working voltage of the piezoelectric ceramic to the piezoelectric ceramic load circuit completely, and when the circuit power supply is closed, the voltage is rapidly released, so that the circuit is rapidly disconnected, and the piezoelectric ceramic load circuit is not influenced.
Example 1:
As shown in fig. 2, the switching power supply module includes an NMOS transistor Q3 and a PMOS transistor Q1, where the G pole of the NMOS is connected to the input end of the main control unit, the D pole is connected to the G pole of the PMOS transistor, the G pole of the PMOS transistor is connected to the power supply of the circuit for driving the piezoelectric ceramic to operate through a capacitor, the S pole is also connected to the power supply of the circuit for driving the piezoelectric ceramic to operate, the D pole is connected to the output end of the switching power supply module, and the Q3 is responsible for performing level conversion to drive the switching of Q1. When the level of the output end of the main control unit is 0, Q3 is turned off, the G pole level of Q1 is pulled up to be the power supply of a circuit operated by piezoelectric ceramics, at the moment, the output end of the switching power supply module is connected with a non-output signal due to the characteristic Q1 of a transistor, the boosting unit does not receive the signal and the voltage, and the load is stopped; when the level of the output end of the main control unit is 0 and 1, at the moment, Q3 is switched on, the G pole level of Q1 is pulled down to 0, at the moment, vgs of Q1 is smaller than the conducting threshold value, Q3 is switched on, the output end of the switching power supply module is connected with an output signal, and the boosting unit receives the signal and the voltage and loads work.
As shown in fig. 4, the boost circuit includes a first input filter capacitor disposed in parallel, an output end of the first input filter capacitor is connected to an input end of a first boost control component, the first boost control component is configured to receive a voltage output by the first input filter capacitor and output a switching signal to a control end of a switching tube, an input end of the switching tube is connected to an inductor, an output end of the switching tube is connected to an anode of a first freewheeling diode, a cathode of the first freewheeling diode is connected to an output filter capacitor, and a voltage dividing resistor is connected in parallel to the filter output capacitor; the input voltage received by the input end of the boost circuit is input to the first boost control component after passing through the first filter capacitors C11 and C13, and the first control component outputs the input voltage to the control end of the switching tube Q5 through the output end to control the switching tube Q5 to be opened and closed, and the switching tube is controlled to be opened and closed continuously according to the square wave waveform. When the switching tube Q5 is in a conducting state, the current in the inductor L1 is increased, and is transmitted to the output end of the boost circuit through the first freewheeling diode, and then is transmitted to the load circuit, and when the load circuit is transmitted, the charge energy is stored in the output filter capacitor C14 due to the parallel voltage dividing resistance. When the switching tube Q5 is in the off state, since the current in the inductor L1 cannot instantaneously disappear in a short time, it generates an induction electromotive force until the capacitor C14 reaches the piezoelectric ceramic operating voltage.
As shown in fig. 6, the bleeder circuit includes a PNP-type transistor and a diode, the input end of the bleeder circuit is connected to the base electrode of the PNP-type transistor through a resistor, connected to the emitter electrode through a forward diode and a piezoelectric ceramic load circuit, and the collector electrode of the PNP-type transistor is grounded, when the working circuit in this example outputs the working voltage of the piezoelectric ceramic, the input end of the bleeder circuit receives the voltage of the booster circuit, the base electrode b of the PNP-type transistor is at a high level, so that the PNP-type transistor Q6 is turned off, and the input end of the bleeder circuit is transferred to the ceramic chip load circuit through the diode D2 to output the working voltage of the piezoelectric ceramic; when the output voltage of the working circuit in the example is low level, the input end voltage of the bleeder circuit is the residual voltage on the piezoelectric ceramic, at the moment, the base b of the triode Q6 is pulled down by the resistor R9, the PNP triode is conducted, and the voltage of the piezoelectric ceramic is rapidly discharged to the ground through the PNP triode and the resistor, so that a final loop is formed.
Example 2: in this example, the structure and connections are the same except that the switching power module is different from that of embodiment 1. In this example, as shown in fig. 3, the switching power supply module comprises an NPN-type transistor and a PMOS transistor, wherein the base electrode of the NPN-type transistor is connected with the input end of the main control unit, the collector electrode of the NPN-type transistor is connected with the G electrode of the PMOS transistor, the G electrode of the PMOS transistor is connected with the power supply of the circuit for driving the piezoelectric ceramic to work through a capacitor, the S electrode of the PMOS transistor is also connected with the power supply of the circuit for driving the piezoelectric ceramic to work, and the D electrode of the NPN-type transistor is connected with the output end of the switching power supply module; the NPN triode is responsible for level conversion to drive the PMOS switch. When the level of the output end of the main control unit is 0, the triode is turned off, the G pole level of the PMOS transistor is pulled up to be the power supply of the circuit operated by the piezoelectric ceramics, at the moment, the PMOS transistor is turned off due to the characteristics of the transistor, the output end of the switch power supply module is connected with a non-output signal, the boosting unit does not receive the signal and the voltage, and the load is stopped; when the level of the output end of the main control unit is 0 and 1, the triode is turned on, the G pole level of the PMOS transistor is pulled down to 0, the Vgs of the PMOS transistor is smaller than the conducting threshold value, the PMOS transistor is turned on, the output end of the switching power supply module is connected with an output signal, and the boosting unit receives the signal and the voltage and works as a load.
Example 3: in this example, the configuration and connection are the same except that the booster circuit is different from that of embodiment 1. In this example, the boost circuit includes a second input filter capacitor arranged in parallel, the input end of the boost circuit is sequentially connected with the second input filter capacitor and a second boost control component, the output end of the second boost control component is connected with the positive electrode of a second freewheeling diode, the negative electrode of the second freewheeling diode is connected with the output end of the boost circuit, the output end of the boost circuit is connected with the output filter circuit in parallel, the positive electrode of the second freewheeling diode is also connected with a boost inductor, in the boost circuit of this example, the voltage input by the input end is input into the second boost control component after passing through the filter capacitor, and is output after being calculated by the second boost control component, at this time, the output voltage of the second boost component is related to the reference voltage inside the second boost control component, the ratio of the internal switching frequency and the voltage dividing resistance, and the second boost component is an existing operation component, and is not described herein.
Example 4: in this example, except for the difference between the switching power supply module and the boost circuit, the other structures and connections are the same, the switching power supply module structure in this example is the same as the switching power supply module in embodiment 2, and the boost circuit structure is the same as the boost circuit in embodiment 3, and the details are not repeated here because the structures are the same.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.
Claims (6)
1. The circuit for driving the piezoelectric ceramic to work is characterized by comprising a main control unit, a switching power supply module, a boosting circuit and a residual electricity bleeder circuit, wherein
The switch power supply module is configured to receive a control signal of the main control unit and transmit a power supply control voltage to the boost circuit;
The booster circuit is configured to receive the power supply control voltage and boost the power supply control voltage to the piezoelectric ceramic working voltage, and an output end of the booster circuit is configured to output the piezoelectric ceramic working voltage to the residual electricity bleeder circuit;
The residual electricity bleeder circuit is configured to transmit the piezoelectric ceramic working voltage to the piezoelectric ceramic load circuit when the piezoelectric ceramic working voltage is received, and is closed to stop transmitting the voltage when the piezoelectric ceramic working voltage is not received.
2. A circuit for driving a piezoelectric ceramic to operate according to claim 1, wherein: the switch power supply module comprises an NMOS transistor and a PMOS transistor, wherein the G electrode of the NMOS is connected with the input end of the main control unit, the D electrode of the NMOS is connected with the G electrode of the PMOS transistor, the G electrode of the PMOS transistor is connected with a power supply of a circuit for driving the piezoelectric ceramics to work through a capacitor, the S electrode of the PMOS transistor is also connected with the power supply of the circuit for driving the piezoelectric ceramics to work, and the D electrode of the NMOS is connected with the output end of the switch power supply module.
3. A circuit for driving a piezoelectric ceramic to operate according to claim 1, wherein: the switching power supply module comprises an NPN type transistor and a PMOS transistor, wherein the base electrode of the NPN type transistor is connected with the input end of the main control unit, the collector electrode of the NPN type transistor is connected with the G electrode of the PMOS transistor, the G electrode of the PMOS transistor is connected with a power supply of a circuit for driving the piezoelectric ceramics to work through a capacitor, the S electrode of the PMOS transistor is also connected with the power supply of the circuit for driving the piezoelectric ceramics to work, and the D electrode of the NPN type transistor is connected with the output end of the switching power supply module.
4. A circuit for driving a piezoelectric ceramic to operate according to claim 1, wherein: the boost circuit comprises a first input filter capacitor which is arranged in parallel, the output end of the first input filter capacitor is connected with the input end of a first boost control component, the first boost control component is configured to receive the voltage output by the first input filter capacitor and output a switching signal to the control end of a switching tube, the input end of the switching tube is connected with an inductor, the output end of the switching tube is connected with the positive electrode of a first freewheeling diode, the negative electrode of the first freewheeling diode is connected with an output filter capacitor, and the filter output capacitor is connected with a divider resistor in parallel.
5. A circuit for driving a piezoelectric ceramic to operate according to claim 1, wherein: the boost circuit comprises a second input filter capacitor which is arranged in parallel, the input end of the boost circuit is sequentially connected with the second input filter capacitor and a second boost control component, the output end of the second boost control component is connected with the positive electrode of a second freewheeling diode, the negative electrode of the second freewheeling diode is connected with the output end of the boost circuit, the output end of the boost circuit is connected with an output filter circuit in parallel, and the positive electrode of the second freewheeling diode is also connected with a boost inductor.
6. A circuit for driving a piezoelectric ceramic to operate according to claim 1, wherein: the bleeder circuit comprises a PNP type tertiary pipe and a diode, wherein the input end of the bleeder circuit is connected with the base electrode of the PNP type tertiary pipe through a resistor, is connected with the emitter through a forward diode and a piezoelectric ceramic load circuit, and is grounded at the collector electrode of the PNP type tertiary pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322689185.9U CN221127151U (en) | 2023-10-08 | 2023-10-08 | Circuit for driving piezoelectric ceramics to work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322689185.9U CN221127151U (en) | 2023-10-08 | 2023-10-08 | Circuit for driving piezoelectric ceramics to work |
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| Publication Number | Publication Date |
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| CN221127151U true CN221127151U (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322689185.9U Active CN221127151U (en) | 2023-10-08 | 2023-10-08 | Circuit for driving piezoelectric ceramics to work |
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| CN (1) | CN221127151U (en) |
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2023
- 2023-10-08 CN CN202322689185.9U patent/CN221127151U/en active Active
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