CN209751950U - output power regulating circuit and frequency spectrum therapeutic instrument - Google Patents
output power regulating circuit and frequency spectrum therapeutic instrument Download PDFInfo
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- CN209751950U CN209751950U CN201920042214.3U CN201920042214U CN209751950U CN 209751950 U CN209751950 U CN 209751950U CN 201920042214 U CN201920042214 U CN 201920042214U CN 209751950 U CN209751950 U CN 209751950U
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Abstract
The utility model discloses an output power regulating circuit, on the basis of prior art's zero crossing point detection circuitry, thyristor control circuit and controller, zero crossing point detection circuitry includes two-way opto-coupler and pull-up resistance, and the input and the alternating current power supply of two-way opto-coupler are connected, and the collecting electrode of the phototransistor of two-way opto-coupler output passes through pull-up resistance and is connected with the controller, the projecting pole ground connection of transistor. The bidirectional optocoupler is stopped at the alternating current zero crossing point moment, outputs a high level to the controller through the pull-up resistor, is switched on at other moments, outputs a low level to the controller, does not need to be provided with a complex circuit for distinguishing a positive half-cycle negative half shaft of the alternating current, avoids the deviation of a zero crossing point detection value caused by improper setting of capacitance parameters, greatly simplifies a zero crossing point detection circuit, reduces element interference, and enables the output power regulating circuit to realize a good control effect more easily. The utility model also discloses a frequency spectrum therapeutic instrument has above-mentioned beneficial effect.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to an output power regulating circuit and frequency spectrum therapeutic instrument.
Background
The output power regulating circuit generally includes a zero-crossing point detecting circuit connected to the ac power supply, a thyristor control circuit connected to the ac power supply, and a controller provided between the zero-crossing point detecting circuit and the thyristor control circuit, and the controller controls the output power of the thyristor control circuit according to a preset output power set value when the zero-crossing point detecting circuit detects the zero-crossing point of the ac power.
fig. 1 is a circuit diagram of a zero crossing detection circuit of an output power regulating circuit in the prior art. As shown in fig. 1, in the prior art, a zero-crossing point detection circuit of an output power adjustment circuit mainly includes a unidirectional optocoupler U1, a resistor R5, a diode D1, a diode D3, a capacitor C4, a resistor R7, a diode D4, a diode D2, a resistor R6, a transistor Q1, and a resistor R8, and a charge-discharge circuit mainly including a transistor C4 is used to turn on or off the optocoupler U1.
in the positive half cycle of the alternating current power supply, when the voltage of the alternating current power supply charges the capacitor C4 through a loop of the resistor R5 → the diode D1 → the capacitor C4 → the diode D4 → the diode D2 → the resistor R6, the diode D4 enables the base of the triode Q1 to be reversely biased, the triode Q1 is cut off, the optocoupler U1 is cut off, the output voltage is connected with the direct current voltage Vcc through the pull-up resistor R9, and the high level is output at the end U _ in; in the negative half cycle of the alternating current power supply, the diode D1 and the diode D2 are reversely biased to be cut off, one path of the electric energy stored in the capacitor C4 forms a loop through the positive electrode of the capacitor C4 → the resistor R7 → the base electrode of the triode Q1 → the emitter electrode of the triode Q1 → the negative electrode of the capacitor C4, so that the triode Q1 is forward biased to be conducted, the other path forms a loop through the positive electrode of the capacitor C4 → the resistor R8 → the photocoupler U1 → the collector electrode of the triode Q1 → the emitter electrode of the triode Q1 → the negative electrode of the capacitor C4, so that the photocoupler U1 is conducted, the output voltage is grounded through the photocoupler U1, and the.
In specific application, the zero-crossing point detection circuit in the output power regulation circuit is complex in structure, the requirement on selection of capacitance parameters of the capacitor C4 is high, and if the selection is improper, the situation that the capacitor C4 is already discharged and ends when a negative half cycle does not end and a positive half cycle does not come yet occurs, so that output waveforms are different every time, and the like can occur.
Therefore, how to simplify the setting of the zero-crossing detection circuit on the basis of avoiding the deviation of the detection value of the zero-crossing detection circuit, so that the output power regulation circuit can more easily realize a good control effect, which is a technical problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an output regulating circuit and frequency spectrum therapeutic instrument for avoid appearing crossing the setting that detection circuit detection value simplified zero crossing point detection circuit on the basis of deviation appears, make output regulating circuit realize good control effect more easily.
in order to solve the technical problem, the utility model provides an output power regulating circuit, which comprises a zero crossing point detection circuit connected with an alternating current power supply, a thyristor control circuit connected with the alternating current power supply, and a controller arranged between the zero crossing point detection circuit and the thyristor control circuit;
The controller is used for controlling the thyristor control circuit to output power corresponding to the output power set value according to the output power set value when receiving a circuit zero crossing signal detected by the zero crossing detection circuit;
The zero crossing point detection circuit comprises a bidirectional optical coupler and a pull-up resistor, wherein the input end of the bidirectional optical coupler is connected with the alternating current power supply, the collector of a photosensitive transistor at the output end of the bidirectional optical coupler is connected with the controller through the pull-up resistor, and the emitter of the photosensitive transistor is grounded.
Optionally, the zero-crossing point detection circuit further includes a current-limiting resistor disposed between the ac power supply and the input end of the bidirectional optocoupler.
Optionally, the thyristor control circuit specifically includes:
The input end of the bidirectional thyristor drive optocoupler is connected with the controller, and the bidirectional thyristor is respectively connected with the output end of the bidirectional thyristor drive optocoupler and the load.
Optionally, the thyristor control circuit further includes:
The voltage-sensitive resistor is connected with the bidirectional controllable silicon in parallel, and the resistor-capacitor circuit is arranged between the bidirectional controllable silicon and the alternating current power supply.
Optionally, the triac driving optocoupler is specifically an MOC 3021.
Optionally, the method further includes:
And the power adjusting circuit is connected with the controller and used for receiving the output power set value.
Optionally, the power adjusting circuit is specifically a multiplexer;
The multi-path selector comprises a plurality of selector switches, one end of each selector switch is grounded, the other end of each selector switch is connected with the controller, and one selector switch corresponds to one set value of the output power.
Optionally, the method further includes:
And the power supply conversion circuit is respectively connected with the alternating current power supply, the zero-crossing detection circuit, the thyristor control circuit and the controller and is used for converting the input voltage of the alternating current power supply into the working voltage of the zero-crossing detection circuit, the working voltage of the thyristor control circuit and the working voltage of the controller.
optionally, the power conversion circuit specifically includes:
the input end of the AC-DC isolation power supply module is connected with the AC power supply, and the linear power supply is connected with the AC-DC isolation power supply module.
In order to solve the above technical problem, the utility model also provides a frequency spectrum therapeutic apparatus, including the aforesaid arbitrary one output power regulating circuit.
The utility model provides an output power regulating circuit, include the zero crossing detection circuitry who is connected with alternating current power supply, the thyristor control circuit who is connected with alternating current power supply, and locate the controller between zero crossing detection circuitry and the thyristor control circuit, the controller is used for when receiving the circuit zero crossing signal that zero crossing detection circuitry detected, according to the power that output power setting value control thyristor control circuit output corresponds with the output power setting value, on this basis, zero crossing detection circuitry includes two-way opto-coupler and pull-up resistance, the input and the alternating current power supply of two-way opto-coupler are connected, the collecting electrode of the phototransistor of two-way opto-coupler output passes through pull-up resistance and is connected with the controller, the projecting pole ground connection of transistor. When the zero crossing point moment of the alternating current arrives, the bidirectional optocoupler is cut off, and a high level is output to the controller through the pull-up resistor; and at other moments, the bidirectional optical coupler is switched on and outputs low level to the controller. The alternating current zero crossing point detection is realized through the bidirectional optical coupler, a complex circuit which is formed by a diode, a capacitor and the like and used for distinguishing a positive half cycle and a negative half cycle of the alternating current is not needed to be arranged, the deviation of a zero crossing point detection value caused by improper setting of capacitance parameters is avoided, the zero crossing point detection circuit is greatly simplified, the element interference is reduced, and the whole output power regulating circuit is easy to realize a good control effect. The utility model discloses still provide a frequency spectrum therapeutic instrument, have above-mentioned beneficial effect, no longer give unnecessary details here.
Drawings
In order to clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a circuit diagram of a zero crossing point detection circuit of an output power regulation circuit in the prior art;
Fig. 2 is a schematic block diagram of an output power adjusting circuit according to an embodiment of the present invention;
Fig. 3 is a circuit diagram of an output power regulating circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of waveform conversion of an output power adjusting circuit according to an embodiment of the present invention.
Detailed Description
The core of the utility model is to provide an output regulating circuit and frequency spectrum therapeutic instrument for avoid appearing crossing the setting that detection circuit detection value simplified zero crossing detection circuit on the basis that the deviation appears, make output regulating circuit export ideal waveform more easily.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 2 is a schematic block diagram of an output power adjusting circuit according to an embodiment of the present invention; fig. 3 is a circuit diagram of an output power regulating circuit according to an embodiment of the present invention; fig. 4 is a schematic diagram of waveform conversion of an output power adjusting circuit according to an embodiment of the present invention.
as shown in fig. 2, the output power adjusting circuit includes a zero-crossing point detecting circuit 1 connected to an alternating current power supply (L pole, N pole), a thyristor control circuit 2 connected to the alternating current power supply, and a controller 3 provided between the zero-crossing point detecting circuit 1 and the thyristor control circuit 2;
the controller 3 is configured to control the thyristor control circuit 2 to output power corresponding to an output power set value according to the output power set value when receiving a circuit zero crossing signal detected by the zero crossing detection circuit 1;
As shown in fig. 3, the zero-crossing point detection circuit 1 in fig. 2 includes a bidirectional optical coupler U2 and a pull-up resistor R1, an input end of the bidirectional optical coupler is connected to an ac power supply, a collector of a phototransistor at an output end of the bidirectional optical coupler U2 is connected to the controller 3 through the pull-up resistor R1, and an emitter of the phototransistor is grounded.
In a specific implementation, the bidirectional optocoupler U2 may employ a TLP 620. In order to prevent the bidirectional optocoupler U2 from being damaged due to overhigh voltage, the zero-crossing detection circuit 1 further comprises a current-limiting resistor arranged between an alternating-current power supply and the input end of the bidirectional optocoupler U2. The current limiting resistor may specifically be three resistors with a resistance of 200k Ω connected in parallel between the ac power supply and the input end of the bidirectional optocoupler U2. Pin 1 of the bidirectional optical coupler U2 is connected with the common end of the current-limiting resistor, pin 2 of the bidirectional optical coupler U2 is connected with the N pole of the alternating current power supply, pin 3 of the bidirectional optical coupler U2 is grounded, and pin 4 of the bidirectional optical coupler U2 is connected with PA15 of the CPU of the finger controller 3 through a pull-up resistor R1.
The thyristor control circuit 2 may specifically include a triac driving optocoupler U3 having an input connected to the controller 3, and a triac Q2 connected to an output of the triac driving optocoupler 3 and to a load J1, respectively. The triac Q2 is connected between the L pole and the N pole of the ac power source. The controller 3 controls the on-off of the bidirectional thyristor driving optocoupler U3 to control the conduction angle of the bidirectional thyristor Q2 so as to adjust the output power.
In order to prevent the triac Q2 from being damaged due to overcurrent, the thyristor control circuit 2 may further include a voltage dependent resistor NR2 connected in parallel with the triac Q2 and a resistor-capacitor circuit (including a resistor R3, a resistor R4 and a capacitor C1) provided between the triac Q2 and the ac power supply, the former can prevent the triac Q2 from being burned out due to overvoltage occurring when the triac Q2 is turned on or off, and the latter has the functions of absorbing higher harmonics and improving the anti-interference capability of the triac Q2.
In practical application, the triac driving optocoupler U3 can adopt an MOC series optocoupler, such as MOC 3021. A triac Q2 (i.e., a thyristor) employs a BTA 16-600.
the CPU in the controller 3 may employ STM32F103C8T6, which includes a resistor, a capacitor, a crystal oscillator, and the like, in addition to the CPU.
When receiving the circuit zero crossing signal detected by the zero crossing detection circuit 1, the controller 3 controls the thyristor control circuit 2 to output power corresponding to the output power set value according to the output power set value, which can be implemented by referring to the method in the prior art. The set value of the output power is input to the controller 3 by an input device, which may be a mechanical button, a touch screen, or the like. In a specific implementation, the output power adjusting circuit may further include a power adjusting circuit 4 connected to the controller 3 for receiving the output power set value.
The power adjusting circuit 4 is embodied as a multiplexer including a plurality of selection switches having one end grounded and the other end connected to the controller, one selection switch corresponding to one output power setting value (e.g., 50W, 100W, 150W, 200W). Each selector switch is connected to a different interface of the controller 3, and each interface corresponds to an output power set value of the selector switch connected thereto. After a certain selection switch is closed, the controller 3 receives a signal of an interface connected with the selection switch, and analyzes the signal to obtain an output power set value corresponding to the signal.
The principle of the output power regulating circuit is shown in fig. 4. Based on the embodiment of the utility model provides an output power regulating circuit, 220V's alternating current (A waveform) inputs zero crossing detection circuitry 1, output B waveform input controller 3's GPIO interface, controller 3 can judge the zero crossing moment through GPIO's rising edge detection, judge power output circuit's setting value simultaneously (for example: 50W, 100W, 150W, 200W), thyristor control circuit 2 is sent into to 3 output C wave forms of controller, thereby thyristor control circuit 2 control output D wave forms, controller 3 controls the shadow part size in the D wave form through control thyristor on-time t (controller 3 receives the zero crossing detection signal to 3 output pulse signal's of controller time), thereby realize the regulation to output power size.
The embodiment of the utility model provides an output power regulating circuit, include the zero crossing detection circuitry who is connected with alternating current power supply, the thyristor control circuit who is connected with alternating current power supply, and locate the controller between zero crossing detection circuitry and the thyristor control circuit, the controller is used for when receiving the circuit zero crossing signal that zero crossing detection circuitry detected, according to the power that output setting value control thyristor control circuit output corresponds with the output setting value, on this basis, zero crossing detection circuitry includes two-way opto-coupler and pull-up resistance, the input and the alternating current power supply of two-way opto-coupler are connected, the collecting electrode of the phototransistor of two-way opto-coupler output passes through pull-up resistance and is connected with the controller, the projecting pole ground connection of transistor. When the zero crossing point moment of the alternating current arrives, the bidirectional optocoupler is cut off, and a high level is output to the controller through the pull-up resistor; and at other moments, the bidirectional optical coupler is switched on and outputs low level to the controller. The alternating current zero crossing point detection is realized through the bidirectional optical coupler, a complex circuit which is formed by a diode, a capacitor and the like and used for distinguishing a positive half cycle and a negative half cycle of the alternating current is not needed to be arranged, the deviation of a zero crossing point detection value caused by improper setting of capacitance parameters is avoided, the zero crossing point detection circuit is greatly simplified, the element interference is reduced, and the whole output power regulating circuit is easy to realize a good control effect. On this basis, the embodiment of the utility model provides a still provide the concrete realization circuit of each part of output power regulating circuit, compared in prior art and can reach better output power regulating effect.
On the basis of the above embodiment, in another embodiment, as shown in fig. 2, in order to improve the practicability, the output power adjusting circuit further includes a power conversion circuit 5, which is respectively connected to the ac power supply, the zero-crossing point detecting circuit 1, the thyristor control circuit 2 and the controller 3, and is configured to convert the input voltage of the ac power supply into the operating voltage of the zero-crossing point detecting circuit 1, the operating voltage of the thyristor control circuit 2 and the operating voltage of the controller 3, so as to provide system power (e.g., 3.3V, 5V).
As shown in fig. 3, the power conversion circuit may specifically include an AC-DC isolated power supply module (which may include HLK-PM01) having an input terminal connected to an AC power source, and a linear power supply (e.g., LM1117-3.3) connected (LD0) to the AC-DC isolated power supply module.
The embodiment of the utility model provides an output power regulating circuit still includes power supply converting circuit. Because the CPU of the controller and other elements need low-voltage power supply, the addition of the power conversion circuit is more beneficial to the practical application of the output power conversion circuit.
The above has detailed each embodiment that output power regulating circuit corresponds, on this basis, the utility model also discloses the spectrum therapeutic instrument that corresponds with above-mentioned output power regulating circuit, this spectrum therapeutic instrument can include above-mentioned embodiment output power regulating circuit.
Since the embodiment of the spectrum therapeutic apparatus portion corresponds to the embodiment of the output power adjusting circuit portion, please refer to the description of the embodiment of the output power adjusting circuit portion for the embodiment of the spectrum therapeutic apparatus portion, which is not repeated herein.
In the embodiments provided in the present application, it should be understood that the disclosed output power regulating circuit and spectral therapeutic apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules is merely a division of logical functions, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
in addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module.
It is right above that the utility model provides an output power regulating circuit and frequency spectrum therapeutic instrument have introduced in detail. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. an output power regulating circuit is characterized by comprising a zero crossing point detection circuit connected with an alternating current power supply, a thyristor control circuit connected with the alternating current power supply and a controller arranged between the zero crossing point detection circuit and the thyristor control circuit;
The controller is used for controlling the thyristor control circuit to output power corresponding to the output power set value according to the output power set value when receiving a circuit zero crossing signal detected by the zero crossing detection circuit;
The zero crossing point detection circuit comprises a bidirectional optical coupler and a pull-up resistor, wherein the input end of the bidirectional optical coupler is connected with the alternating current power supply, the collector of a photosensitive transistor at the output end of the bidirectional optical coupler is connected with the controller through the pull-up resistor, and the emitter of the photosensitive transistor is grounded.
2. the output power regulating circuit according to claim 1, wherein the zero crossing detection circuit further comprises a current limiting resistor disposed between the ac power source and the input of the bidirectional optocoupler.
3. The output power regulating circuit according to claim 1, wherein the thyristor control circuit comprises in particular:
the input end of the bidirectional thyristor drive optocoupler is connected with the controller, and the bidirectional thyristor is respectively connected with the output end of the bidirectional thyristor drive optocoupler and the load.
4. the output power regulation circuit of claim 3, wherein the thyristor control circuit further comprises:
The voltage-sensitive resistor is connected with the bidirectional controllable silicon in parallel, and the resistor-capacitor circuit is arranged between the bidirectional controllable silicon and the alternating current power supply.
5. The output power regulating circuit according to claim 3, wherein the triac driven optocoupler is in particular a MOC 3021.
6. The output power regulation circuit of claim 1, further comprising:
And the power adjusting circuit is connected with the controller and used for receiving the output power set value.
7. The output power regulating circuit according to claim 6, wherein the power regulating circuit is embodied as a multiplexer;
the multi-path selector comprises a plurality of selector switches, one end of each selector switch is grounded, the other end of each selector switch is connected with the controller, and one selector switch corresponds to one set value of the output power.
8. The output power regulation circuit of claim 1, further comprising:
And the power supply conversion circuit is respectively connected with the alternating current power supply, the zero-crossing detection circuit, the thyristor control circuit and the controller and is used for converting the input voltage of the alternating current power supply into the working voltage of the zero-crossing detection circuit, the working voltage of the thyristor control circuit and the working voltage of the controller.
9. the output power regulating circuit according to claim 8, wherein the power conversion circuit specifically comprises:
The input end of the AC-DC isolation power supply module is connected with the AC power supply, and the linear power supply is connected with the AC-DC isolation power supply module.
10. A spectral therapy apparatus comprising an output power regulating circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920042214.3U CN209751950U (en) | 2019-01-10 | 2019-01-10 | output power regulating circuit and frequency spectrum therapeutic instrument |
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| CN201920042214.3U CN209751950U (en) | 2019-01-10 | 2019-01-10 | output power regulating circuit and frequency spectrum therapeutic instrument |
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| CN209751950U true CN209751950U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109568788A (en) * | 2019-01-10 | 2019-04-05 | 河南翔宇医疗设备股份有限公司 | Output power regulating circuit and frequency spectrum therapeutic instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109568788A (en) * | 2019-01-10 | 2019-04-05 | 河南翔宇医疗设备股份有限公司 | Output power regulating circuit and frequency spectrum therapeutic instrument |
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