CN216086484U - Low-voltage ion wind generator and positive output voltage control circuit thereof - Google Patents
Low-voltage ion wind generator and positive output voltage control circuit thereof Download PDFInfo
- Publication number
- CN216086484U CN216086484U CN202122510231.5U CN202122510231U CN216086484U CN 216086484 U CN216086484 U CN 216086484U CN 202122510231 U CN202122510231 U CN 202122510231U CN 216086484 U CN216086484 U CN 216086484U
- Authority
- CN
- China
- Prior art keywords
- voltage
- unit
- positive
- output
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a low-voltage ion wind generator and a positive output voltage control circuit thereof, wherein the circuit comprises: the conversion unit is used for converting input alternating current into direct current; a conversion unit for converting the direct current into positive and negative square wave voltages; the boosting unit is used for boosting the positive square wave voltage and the negative square wave voltage; the positive voltage output unit is used for converting the positive square wave voltage and the negative square wave voltage subjected to the boosting treatment into direct current positive voltage for output; the isolation feedback unit is used for carrying out isolation sampling on the direct-current positive voltage so as to output a feedback voltage signal; and the control unit is used for generating a control signal according to the feedback voltage signal and controlling the conversion unit according to the control signal so as to adjust the direct-current positive voltage. The circuit can realize higher air outlet speed and accurate air volume control under low voltage by generating direct-current positive pressure and carrying out output feedback control on the direct-current positive pressure, and is suitable for occasions with low voltage, high requirement on air speed, accurate air volume control and low requirement on voltage regulation range.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to a low-voltage ion wind generator and a positive output voltage control circuit thereof.
Background
The ion wind is a phenomenon in which corona discharge occurs in an uneven electric field, so that gas molecules are in an ion state and form a fluid. Generally, if a desired ion wind volume is to be obtained, a voltage of 10KV or even more than 20KV needs to be provided to the ion wind generator, and the high-voltage working environment causes some problems difficult to solve in the aspects of electrode material selection, electromagnetic compatibility, wind outlet speed, output accuracy, and the like.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a positive output voltage control circuit of a low-voltage ion wind generator, which can realize higher wind outlet speed and accurate wind volume control under low voltage by generating direct-current positive voltage and performing output feedback control on the direct-current positive voltage, and is suitable for occasions with low voltage, high requirement on wind speed, accurate wind volume control, but low requirement on voltage regulation range.
The second purpose of the utility model is to provide a low-pressure ion wind generator.
In order to achieve the above object, a first embodiment of the present invention provides a positive output voltage control circuit of a low-voltage ion wind generator, including: the conversion unit is used for converting input alternating current into direct current; the conversion unit is connected with the conversion unit and is used for converting the direct current into positive and negative square wave voltages; the boosting unit is connected with the conversion unit so as to boost the positive square wave voltage and the negative square wave voltage; the positive-voltage output unit is connected with the boosting unit so as to convert the positive and negative square-wave voltage subjected to boosting treatment into direct-current positive voltage for output; the isolation feedback unit is connected with the positive voltage output unit and is used for carrying out isolation sampling on the direct current positive voltage so as to output a feedback voltage signal; and the control unit is respectively connected with the conversion unit and the isolation feedback unit, generates a control signal according to the feedback voltage signal and controls the conversion unit according to the control signal so as to adjust the direct-current positive voltage.
According to the positive output voltage control circuit of the low-voltage ionic wind generator, input alternating current is converted into direct current through the conversion unit, the direct current is converted into positive and negative square wave voltage through the conversion unit, the positive and negative square wave voltage is boosted through the boosting unit, and the positive and negative square wave voltage after boosting is converted into direct current positive voltage through the positive voltage output unit to be output; meanwhile, the isolation feedback unit is used for carrying out isolation sampling on the direct-current positive voltage so as to output a feedback voltage signal, the control unit is used for generating a control signal according to the feedback voltage signal, and the conversion unit is controlled according to the control signal so as to adjust the direct-current positive voltage. The circuit can realize higher air outlet speed and accurate air volume control under low voltage by generating direct-current positive pressure and carrying out output feedback control on the direct-current positive pressure, and is suitable for occasions with low voltage, high requirement on air speed, accurate air volume control and low requirement on voltage regulation range.
According to one embodiment of the present invention, an isolated feedback unit includes: one end of the first resistor is connected with the output end of the positive voltage output unit; one end of the second resistor is connected with the other end of the first resistor and is provided with a first node, and the other end of the second resistor is grounded; the isolation sampling chip is connected with the first node, the output end of the isolation sampling chip is connected with the control unit, and the isolation sampling chip performs isolation sampling on the direct-current positive voltage to output a feedback voltage signal.
According to one embodiment of the present invention, the first resistor is a very high voltage resistor made using a nail of oxide.
According to one embodiment of the utility model, the control unit comprises: the first input end of the comparison module is connected with the output end of the isolation feedback unit, the second input end of the comparison module is connected with the reference voltage end, and the comparison module compares the feedback voltage signal with the reference voltage signal and outputs a voltage error signal; the input end of the PI regulating module is connected with the output end of the comparison module, and the PI regulating module regulates the voltage error signal and outputs a regulating signal; and the main control chip is connected with the output end of the PI regulation module and generates a control signal according to the regulation signal.
According to one embodiment of the utility model, the main frequency of the main control chip is not lower than 32MHZ, and the switching frequency is not higher than 92 KHZ.
According to one embodiment of the utility model, the boosting unit adopts a boosting transformer with multiple wire slots.
According to one embodiment of the utility model, the positive direct voltage is less than 6 KV.
According to an embodiment of the present invention, the conversion unit is configured as any one of a full-bridge driving circuit, a half-bridge push-pull driving circuit, or a single-tube driving circuit.
According to an embodiment of the present invention, when the converting unit is a full-bridge driving circuit, the control unit is further configured to perform phase shift control on the full-bridge driving circuit.
According to one embodiment of the present invention, the positive voltage output unit is a voltage-multiplying output circuit.
In order to achieve the above object, a second embodiment of the present invention provides a low-voltage ion wind generator, which includes the positive output voltage control circuit.
According to the low-voltage ion wind generator provided by the embodiment of the utility model, through the positive output voltage control circuit, the direct-current positive voltage is generated, and the output feedback control is performed on the direct-current positive voltage, so that the higher wind outlet speed and the accurate wind volume control under the low voltage can be realized, and the low-voltage ion wind generator is suitable for occasions with low voltage, high wind speed requirement, accurate wind volume control and low voltage-adjusting range requirement.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
Fig. 1 is a block diagram of a positive output voltage control circuit of a low voltage ion wind generator according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a positive output voltage control circuit of a low voltage ionic wind generator according to a first embodiment of the present invention;
fig. 3 is a circuit diagram of a positive output voltage control circuit of a low voltage ion wind generator according to a second embodiment of the present invention;
fig. 4 is a circuit diagram of a positive output voltage control circuit of a low voltage ion wind generator according to a third embodiment of the present invention;
fig. 5 is a block diagram of a low pressure ionic wind generator according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
A low-voltage ion wind generator and a positive output voltage control circuit thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a block diagram illustrating a positive output voltage control circuit of a low voltage ion wind generator according to an embodiment of the present invention, and referring to fig. 1, the positive output voltage control circuit of the low voltage ion wind generator includes: the device comprises a conversion unit 10, a transformation unit 20, a boosting unit 30, a positive pressure output unit 40, an isolation feedback unit 50 and a control unit 60.
The conversion unit 10 is used for converting input alternating current into direct current; the converting unit 20 is connected with the converting unit 10, and the converting unit 20 is used for converting the direct current into positive and negative square wave voltages; the boosting unit 30 is connected with the converting unit 20 and used for boosting the positive square wave voltage and the negative square wave voltage; the positive voltage output unit 40 is connected with the boosting unit 30 and used for converting the positive and negative square wave voltage subjected to boosting processing into direct-current positive voltage for output; the isolation feedback unit 50 is connected to the positive voltage output unit 40, and the isolation feedback unit 50 is configured to perform isolation sampling on the direct-current positive voltage to output a feedback voltage signal; the control unit 60 is connected to the converting unit 20 and the isolation feedback unit 50, respectively, and the control unit 60 is configured to generate a control signal according to the feedback voltage signal and control the converting unit 20 according to the control signal to adjust the dc positive voltage.
Specifically, the input end of the converting unit 10 is connected to an external ac power source, the converting unit 10 is mainly used for converting ac power into dc power and providing the dc power to the converting unit 20, and specific implementations may include multiple implementations, for example, rectifying ac power to obtain dc power, or outputting dc power with high power and low voltage through a flyback topology circuit, and the like, that is, the dc power input to the converting unit 20 may be a high voltage after ac rectification or a low voltage after voltage reduction conversion, and the implementation is not limited herein.
The input end of the converting unit 20 is connected to the output end of the converting unit 10, the converting unit 20 is mainly used for converting the direct current into positive and negative square wave voltages (i.e. square wave voltages having positive and negative voltages), and the implementation manners may include various ones, for example, the converting unit 20 may include, but is not limited to, a half-bridge push-pull driving circuit, a full-bridge driving circuit, or a single-tube driving circuit, as long as the direct current can be converted into the positive and negative square wave voltages, and the specific implementation is not limited herein.
The input end of the voltage boosting unit 30 is connected to the output end of the transforming unit 20, and the voltage boosting unit 30 is mainly used for amplifying and boosting positive and negative square wave voltages, and can be implemented by a transformer.
The input end of the positive-voltage output unit 40 is connected with the output end of the boosting unit 30, the output end of the positive-voltage output unit 40 is connected with the ion wind generation load, the positive-voltage output unit 40 is mainly used for converting the boosted positive and negative square-wave voltages output by the boosting unit 30 to obtain direct-current positive voltage (namely, forward direct-current voltage), and the direct-current positive voltage can be specifically realized through a voltage doubling circuit, and the voltage doubling coefficient can be set according to actual conditions, for example, the voltage doubling coefficient can be 1, namely, only voltage conversion is performed without voltage doubling, or the voltage doubling coefficient is greater than 1, namely, voltage doubling is performed while voltage conversion is performed.
The input end of the isolation feedback unit 50 is connected with the output end of the positive voltage output unit 40, the output end of the isolation feedback unit 50 is connected with the control unit 60, and the isolation feedback unit 50 is mainly used for sampling the voltage of the direct current positive voltage, isolating high voltage and low voltage, obtaining a feedback voltage signal proportional to the direct current positive voltage, and specifically realizing the isolation by a sampling circuit and an isolation circuit.
The control unit 60 is mainly used for generating a corresponding control signal according to the feedback voltage signal, and then controlling the transformation unit 20 according to the signal to adjust the dc positive voltage, so that the adjusted dc positive voltage is consistent with the target dc positive voltage, thereby realizing stable and accurate voltage output.
When the circuit is powered on and works, input alternating current (such as alternating current of 90V-265V) is converted into direct current DC through the conversion unit 10, the direct current DC is converted into positive and negative square wave voltages through the conversion unit 20, then the positive and negative square wave voltages are subjected to boosting processing through the boosting unit 30, finally the boosted positive and negative square wave voltages are converted through the positive voltage output unit 40 to obtain direct current positive voltage (such as direct current positive voltage smaller than 6 KV), assuming that the effective value of the positive and negative square wave voltages output by the conversion unit 20 is V _ DC0, the effective value of the positive and negative square wave voltages is boosted through the boosting unit 30 to become V _ DC1, and finally the positive voltage output unit 40 is changed into V _ DC2, namely the effective value of the direct current positive voltage is V _ DC 2; meanwhile, the isolation feedback unit 50 performs voltage isolation sampling on the direct current positive voltage to obtain a feedback voltage signal, the control unit 60 obtains the direct current positive voltage according to the feedback voltage signal, and controls the conversion unit 20 according to the direct current positive voltage, for example, an effective value V _ DC2 of the direct current positive voltage can be obtained according to the feedback voltage signal, and then a control signal is generated according to a magnitude relation between the effective value V _ DC2 and a reference voltage value (the reference voltage value is an effective value of a target direct current positive voltage) to control the conversion unit 20.
If the effective value V _ DC2 of the positive DC voltage is greater than the reference voltage value, a step-down control signal is generated to control the transforming unit 20 to decrease the effective value V _ DC2 of the positive DC voltage, for example, when the control signal is a frequency-variable signal or a duty-cycle signal, the frequency of the frequency-variable signal or the duty-cycle of the duty-cycle signal can be reduced by a certain value, and when the control signal is a phase-shift control signal, the phase of the phase-shift control signal can be increased by a certain value, and then the transforming unit 20 is controlled according to the adjusted frequency-variable signal, duty-cycle signal or phase-shift control signal to decrease the effective value V _ DC0 of the positive and negative square wave voltages, so that the effective value V _ DC2 of the positive DC voltage gradually approaches the reference voltage value. If the effective value V _ DC2 of the positive DC voltage is smaller than the reference voltage value, a boost control signal is generated to control the converting unit 20 to increase the effective value V _ DC2 of the positive DC voltage, for example, when the control signal is a variable frequency signal or a duty ratio signal, the frequency of the variable frequency signal or the duty ratio of the duty ratio signal can be increased by a certain value, and when the control signal is a phase shift control signal, the phase of the phase shift control signal can be decreased by a certain value, and then the converting unit 20 is controlled according to the adjusted variable frequency signal, duty ratio signal or phase shift control signal to increase the effective value V _ DC0 of the positive and negative square wave voltages, thereby gradually making the effective value V _ DC2 of the positive DC voltage approach the reference voltage value. If the effective value V _ DC2 of the direct-current positive voltage is equal to the reference voltage value, a voltage keeping control signal is generated, namely, the current frequency conversion signal, the duty ratio signal or the phase-shifting control signal is kept unchanged. In the working process of the circuit, the circuit is circularly executed to realize stable and accurate direct current positive voltage output, for example, the direct current positive voltage output within 6KV can be realized.
In the above embodiment, through the converting unit, the mutual cooperation of boost unit and malleation output unit, can realize direct current malleation output, thereby overcome the problem that air-out speed is low, satisfy higher air-out speed requirement, simultaneously, carry out the voltage isolation sampling to direct current malleation through keeping apart feedback unit, and under the cooperation of the control unit, can realize stable, accurate voltage output, and then realize the accurate control of amount of wind, be applicable to within 6KV, high to the wind speed requirement, air volume control is accurate, nevertheless to the occasion that the range of adjusting pressure required, can cooperate the low pressure ion wind generator to use. That is to say, the circuit can realize the accurate control of higher air outlet speed and air volume under low voltage by generating direct-current positive voltage and carrying out output feedback control on the direct-current positive voltage, and is suitable for occasions with low voltage, high requirement on air speed, accurate air volume control and low requirement on voltage regulation range.
The respective units in the positive output voltage control circuit of the present application are explained below with reference to fig. 2 to 4.
In some embodiments, as shown with reference to fig. 2, the conversion unit 10 may include: a rectifier bridge BR1 and a filter circuit. The input end of the rectifier bridge BR1 is connected with the input alternating current AC and is used for rectifying the input alternating current AC to obtain pulsating direct current; the input end of the filter circuit is connected with the output end of the rectifier bridge BR1, and the output end of the filter circuit is connected with the conversion unit 20, and the filter circuit is used for filtering the pulsating direct current to obtain stable direct current and supplying the stable direct current to the conversion unit 20. Optionally, the filter circuit may include a filter capacitor EC1, and the pulsating direct current is filtered by the filter capacitor EC 1.
The transforming unit 20 may be a full bridge driving circuit, and specifically includes: a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4. The first end of the first switch tube Q1 and the first end of the third switch tube Q3 are connected and then connected with the first output end of the converting unit 10; a first end of the second switch Q2 is connected to a second end of the first switch Q1 and has a second node, and the second node is connected to the first input end of the voltage boost unit 30; a first end of the fourth switching tube Q4 is connected to the second end of the third switching tube Q3 and has a third node, and the third node is connected to the second input end of the voltage boost unit 30; the second end of the second switch tube Q2 is connected to the second end of the fourth switch tube Q4 and then connected to the second output end of the converting unit 10; the control end of the first switching tube Q1, the control end of the second switching tube Q2, the control end of the third switching tube Q3 and the control end of the fourth switching tube Q4 are respectively connected to the control unit 60 to be turned on or off under the control of the control unit 60, so as to convert the direct current provided by the conversion unit 10 into positive and negative square wave voltages and provide the positive and negative square wave voltages to the voltage boost unit 30.
The booster unit 30 may include: one end of a primary winding of the first transformer T1 is connected to a second node in the conversion unit 20, the other end of the primary winding of the first transformer T1 is connected to a third node in the conversion unit 20, one end of a secondary winding of the first transformer T1 is connected to a first input end of the positive voltage output unit 40, the other end of the secondary winding of the first transformer T1 is connected to a second input end of the positive voltage output unit 40, and one end of the primary winding of the first transformer T1 and one end of the secondary winding of the first transformer T1 are homonymous ends. The positive and negative square wave voltages supplied from the converter unit 20 are boosted by the first transformer T1 and supplied to the positive voltage output unit 40. Optionally, the first transformer T1 is a step-up transformer with multiple wire slots, that is, the step-up unit 30 adopts a step-up transformer with multiple wire slots, so that the risk of turn-to-turn short circuit of the winding can be effectively reduced, and the reliability of the whole circuit is further improved.
The positive voltage output unit 40 may be a voltage-doubling output circuit, and specifically may include: a first diode D1, a second diode D2, a first capacitor C1, and a second capacitor C2. Wherein, the cathode of the first diode D1 is connected with one end of the secondary winding of the first transformer T1; one end of a first capacitor C1 is connected to the other end of the secondary winding of the first transformer T1, and the other end of the first capacitor C1 is connected to the anode of the first diode D1; one end of the second capacitor C2 is connected to the cathode of the first diode D1; an anode of the second diode D2 is connected to the other end of the second capacitor C2, and a cathode of the second diode D2 is connected to an anode of the first diode D1. Also, in this example, taking the other end of the second capacitor C2 as a reference ground, a positive dc voltage + HIGHV may be obtained at one end of the first capacitor C1. In this example, the positive voltage output unit 40 can perform double-voltage rectification on the positive and negative square wave voltages output by the voltage boost unit 30 to obtain the direct current positive voltage + HIGHV, and if the single-voltage rectification is required, the voltage doubling is not performed, the second capacitor C2 and the second diode D2 can be removed, and if more double-voltage rectification is required, the capacitors and the diodes can be continuously added to realize more double voltages.
The isolation feedback unit 50 may include: the circuit comprises a first resistor R1, a second resistor R2 and an isolated sampling chip IC 2. One end of the first resistor R1 is connected to the output end of the positive voltage output unit 40, and specifically to one end of the first capacitor C1; one end of the second resistor R2 is connected with the other end of the first resistor R1 and is provided with a first node, and the other end of the second resistor R2 is grounded; the sampling end of the isolation sampling chip IC2 is connected with the first node, the output end of the isolation sampling chip IC2 is connected with the control unit 60, and the isolation sampling chip IC2 conducts isolation sampling on the direct-current positive voltage to output a feedback voltage signal to the control unit 60. It should be noted that, in this example, the first resistor R1 and the second resistor R2 constitute a voltage sampling circuit, so as to sample the dc positive voltage + HIGHV to obtain a sampling signal, and the sampling signal is isolated by the isolation sampling chip IC2 and then transmitted to the control unit 60, so as to implement isolated sampling of the voltage. Optionally, the first resistor R1 is an extra-high voltage resistor, which can be made of a nail oxidized by RuO2, and has a withstand voltage range of 7kV or more and a resistance range of ohm, for example, 72M Ω to 200M Ω. Optionally, the isolation voltage withstand voltage of the isolation sampling chip IC2 is above 5KV, and the temperature drift coefficient is less than 35 ppm/deg.c.
The control unit 60 may include: the voltage regulator comprises a comparison module 61, a PI regulation module 62 and a main control chip IC1, wherein a first input end of the comparison module 61 is connected with an output end of the isolation feedback unit 50, a second input end of the comparison module 61 is connected with a reference voltage end, and the comparison module 61 compares a feedback voltage signal with a reference voltage signal Vref to output a voltage error signal; the input end of the PI adjusting module 62 is connected with the output end of the comparing module 61, and the PI adjusting module 62 adjusts the voltage error signal and outputs an adjusting signal; the main control chip IC1 is connected with the output end of the PI adjusting module 62, and the main control chip IC1 generates a control signal according to the adjusting signal. Optionally, the switching frequency of the main control chip IC1 is not higher than 92KHZ, the main frequency is not lower than 32MHZ, and the number of analog-to-digital conversion bits is not lower than 10 bits.
It should be noted that, in the circuit shown in fig. 2, the control unit 60 may further include a DC/DC conversion circuit 63, an input end of which is connected to an output end of the rectifier bridge BR1, and an output end of which is connected to the main control chip IC1, for converting the high-voltage direct current output by the rectifier bridge BR1 into a low-voltage direct current VCC to supply power to low-voltage loads such as the main control chip IC 1.
When the circuit shown in fig. 2 is powered on and works, input alternating current (for example, alternating current of 90V to 265V) is rectified by a rectifier bridge BR1 and then converted into pulsating high-voltage direct current DC, the pulsating high-voltage direct current DC is filtered by a filter capacitor EC1 and then converted into stable high-voltage direct current DC, the stable high-voltage direct current DC is firstly converted into positive and negative square wave voltage by a full bridge driving circuit, then is subjected to direct current boosting treatment by a first transformer T1, and finally is subjected to voltage doubling rectification by a voltage doubling output circuit and then outputs direct current positive voltage (for example, direct current positive voltage smaller than 6 KV) to supply power for external ion wind generation loads. Meanwhile, the output direct-current positive voltage is divided by the first resistor R1 and the second resistor R2 to obtain a sampling signal, the sampling signal is isolated by the isolation sampling chip IC2 to obtain a feedback voltage signal V0, the comparison module 61 calculates the feedback voltage signal V0 and the reference voltage signal Vref to obtain a voltage error signal, the voltage error signal is adjusted by the PI adjustment module 62 to output an adjustment signal, the main control chip IC1 generates control signals PWM1, PWM2, PWM3 and PWM4 (such as a frequency conversion signal, a duty ratio signal or a phase shift control signal) based on the adjustment signal, and then the first switch tube Q1 to the fourth switch tube Q4 in the full-bridge driving circuit are controlled (such as frequency conversion control, duty ratio control or phase shift control) according to the control signals PWM1, PWM2, PWM3 and PWM 4.
Further, assuming that the switching frequency of the main control chip IC1 is 92KHZ, the main frequency is 32MHZ, and the voltage division ratio (R1+ R2)/R2 is greater than or equal to 1200 (i.e., 6KV/5V), the minimum pulse width recognition voltage Vpwm _ min is (96KHZ/32MHZ) × 5V is 15mV, and the theoretical voltage control error is ± 18V/6KV is ± 0.3%, which indicates that the control precision is high.
In addition, a sampling resistor RS1 may be further disposed in the conversion unit 20, one end of the sampling resistor RS1 is connected to the second output end of the conversion unit 10, the other end of the sampling resistor RS1 is connected to the second end of the second switch tube Q2, the second end of the fourth switch tube Q4, and the main control chip IC1 in the control unit 60, respectively, and the main control chip IC1 obtains the working current of the conversion unit 20 through sampling by the sampling resistor RS1, so as to protect the conversion unit 20 according to the working current.
In the above embodiment, the direct-current positive pressure can be generated through the mutual cooperation of the units, and the direct-current positive pressure is output and fed back for control, so that the accurate control of higher air outlet speed and air volume under low voltage can be realized, and the wind speed regulating device is suitable for occasions with low voltage, high requirement on wind speed, accurate air volume control and low requirement on voltage regulating range.
In other embodiments, referring to fig. 3, compared to the circuit shown in fig. 2, the main difference is that the converting unit 20 is a half-bridge boost-free driving circuit, and the structure and connection relationship of the corresponding boosting unit 30 are also changed.
Specifically, referring to fig. 3, the transform unit 20 may include: a fifth switching tube Q5 and a sixth switching tube Q6, wherein a first end of the fifth switching tube Q5 is connected to the first input end of the voltage boost unit 30; a first end of a sixth switching tube Q6 is connected to the second end of the fifth switching tube Q5 and has a fourth node, the fourth node is connected to the second output end of the converting unit 10, a second end of the sixth switching tube Q6 is connected to the second input end of the voltage boosting unit 30, and the third input end of the voltage boosting unit 30 is further connected to the first output end of the converting unit 10; a control terminal of the fifth switching tube Q5 and a control terminal of the sixth switching tube Q6 are respectively connected to the control unit 60. Further, one end of the sampling resistor RS1 in the transforming unit 20 is connected to the second output terminal of the transforming unit 10, and the other end of the sampling resistor RS1 is connected to the fourth node and the main control chip IC1 in the control unit 60.
The booster unit 30 includes: a first end of a primary winding of the second transformer T2 of the second transformer T2 is connected to a first end of the fifth switching tube Q5, a second end of the primary winding of the second transformer T2 is connected to a second end of the sixth switching tube Q6, a third end of the primary winding of the second transformer T2 is connected to a first output end of the conversion unit 10, a first end of a secondary winding of the second transformer T2 is connected to a first input end of the positive voltage output unit 40, a second end of the secondary winding of the second transformer T2 is connected to a second input end of the positive voltage output unit 40, and the first end and the third end of the primary winding of the second transformer T2 and the first end of the secondary winding of the second transformer T2 are homonymous ends.
It should be noted that, for the description and the working process of each other unit in the circuit, please refer to the circuit shown in fig. 2, and details are not repeated here.
In this embodiment, can produce direct current malleation through mutually supporting of each unit to output feedback control is carried out to this direct current malleation, thereby can realize the accurate control of higher air-out speed and amount of wind under the low-voltage, be applicable to the low-voltage, require high, the amount of wind control is accurate to the wind speed, nevertheless to the occasion that the pressure regulating range requirement is not high, and the cost is lower.
In still other embodiments, referring to fig. 4, the main difference is that the transforming unit 20 is a single-tube driving circuit, compared to the circuit shown in fig. 2.
Specifically, referring to fig. 4, the transform unit 20 may include: the circuit comprises a first inductor L1, a third resistor R3, a third capacitor C3, a third diode D3 and a seventh switch tube Q7. One end of the first inductor L1 is connected to the first output terminal of the converting unit 10, and the other end of the first inductor L1 is connected to the first input terminal of the voltage boosting unit 30; one end of a third resistor R3 is connected with the other end of the first inductor L1, and the other end of the third resistor R3 is connected with the cathode of a third diode D3; the third capacitor C3 is connected with the third resistor R3 in parallel; a first terminal of the seventh switching tube Q7 is connected to the anode of the third diode D3 and the second input terminal of the voltage boost unit 30, respectively, a second terminal of the seventh switching tube Q7 is connected to the second output terminal of the conversion unit 10, and a control terminal of the seventh switching tube Q7 is connected to the control unit 60. Further, one end of the sampling resistor RS1 is connected to the second output terminal of the converting unit 10, and the other end of the sampling resistor RS1 is connected to the second terminal of the seventh switching tube Q7 and the main control chip IC1 in the control unit 60, respectively.
It should be noted that, for the description and the working process of each other unit in the circuit, please refer to the circuit shown in fig. 2, and details are not repeated here.
In this embodiment, can produce direct current malleation through mutually supporting of each unit to output feedback control is carried out to this direct current malleation, thereby can realize the accurate control of higher air-out speed and amount of wind under the low-voltage, be applicable to the low-voltage, require high, the amount of wind control is accurate to the wind speed, nevertheless to the occasion that the pressure regulating range requirement is not high, and the cost is lower, occupation space is little.
In summary, according to the positive output voltage control circuit of the embodiment of the present invention, the converting unit converts the input ac power into the dc power, the converting unit converts the dc power into the positive and negative square wave voltages, the boosting unit boosts the positive and negative square wave voltages, and the positive voltage output unit converts the boosted positive and negative square wave voltages into the dc positive voltage for output; meanwhile, the isolation feedback unit is used for carrying out isolation sampling on the direct-current positive voltage so as to output a feedback voltage signal, the control unit is used for generating a control signal according to the feedback voltage signal, and the conversion unit is controlled according to the control signal so as to adjust the direct-current positive voltage. The circuit can realize the accurate control of higher air outlet speed and air volume under low voltage by generating direct-current positive pressure and carrying out output feedback control on the direct-current positive pressure, and is suitable for occasions with low voltage, high requirement on air speed, accurate air volume control and low requirement on voltage regulation range.
Fig. 5 is a block diagram of a positive pressure ion wind generator according to an embodiment of the present invention, and referring to fig. 5, the low voltage ion wind generator 1000 includes the aforementioned positive output voltage control circuit 100.
In some examples, the low voltage ionic wind generator 1000 may be a generator that can generate ionic wind within 6 KV. It should be noted that the low-voltage ion wind generator 1000 of the present application can be applied to household appliances, such as air conditioners, fans, etc.
According to the low-voltage ion wind generator provided by the embodiment of the utility model, the positive direct-current positive voltage is generated through the positive output voltage control circuit, and the output feedback control is carried out on the positive direct-current positive voltage, so that the higher output speed and the higher wind volume under the low voltage can be accurately controlled, and the low-voltage ion wind generator is suitable for occasions with low voltage, high wind speed requirement, accurate wind volume control and low voltage-adjusting range requirement.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A positive output voltage control circuit for a low voltage ionic wind generator, comprising:
the conversion unit is used for converting input alternating current into direct current;
the conversion unit is connected with the conversion unit and is used for converting the direct current into positive and negative square wave voltages;
the boosting unit is connected with the converting unit so as to boost the positive square wave voltage and the negative square wave voltage;
the positive voltage output unit is connected with the boosting unit so as to convert the positive square wave voltage and the negative square wave voltage subjected to boosting treatment into direct-current positive voltage for output;
the isolation feedback unit is connected with the positive voltage output unit and is used for carrying out isolation sampling on the direct current positive voltage so as to output a feedback voltage signal;
and the control unit is respectively connected with the conversion unit and the isolation feedback unit, generates a control signal according to the feedback voltage signal and controls the conversion unit according to the control signal so as to adjust the direct-current positive voltage.
2. The circuit of claim 1, wherein the isolation feedback unit comprises:
one end of the first resistor is connected with the output end of the positive voltage output unit;
one end of the second resistor is connected with the other end of the first resistor and is provided with a first node, and the other end of the second resistor is grounded;
keep apart the sampling chip, keep apart the sampling end of sampling chip with first node links to each other, keep apart the output of sampling chip with the control unit links to each other, it is right to keep apart the sampling chip the sampling is kept apart to the direct current malleation, with the output feedback voltage signal.
3. The circuit of claim 2, wherein the first resistor is a very high voltage resistor made of a nail of oxide.
4. A circuit according to any one of claims 1-3, characterized in that the control unit comprises:
a first input end of the comparison module is connected with an output end of the isolation feedback unit, a second input end of the comparison module is connected with a reference voltage end, and the comparison module compares the feedback voltage signal with a reference voltage signal and outputs a voltage error signal;
the input end of the PI adjusting module is connected with the output end of the comparison module, and the PI adjusting module adjusts the voltage error signal and outputs an adjusting signal;
and the main control chip is connected with the output end of the PI regulating module and generates the control signal according to the regulating signal.
5. The circuit of claim 4, wherein the main frequency of the main control chip is not lower than 32MHz, and the switching frequency is not higher than 92 KHZ.
6. The circuit of any one of claims 1-3, wherein the boost unit employs a multi-slot boost transformer.
7. The circuit of any one of claims 1-3, wherein the positive direct current voltage is less than 6 KV.
8. The circuit according to any one of claims 1-3, wherein the conversion unit is configured as any one of a full-bridge drive circuit, a half-bridge push-pull drive circuit, or a single-tube drive circuit.
9. The circuit of claim 8, wherein when the transforming unit is the full-bridge driving circuit, the control unit is further configured to perform phase shift control on the full-bridge driving circuit.
10. The circuit according to any one of claims 1 to 3, wherein the positive voltage output unit is a voltage-doubler output circuit.
11. A low voltage ionic wind generator comprising a positive output voltage control circuit according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122510231.5U CN216086484U (en) | 2021-10-18 | 2021-10-18 | Low-voltage ion wind generator and positive output voltage control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122510231.5U CN216086484U (en) | 2021-10-18 | 2021-10-18 | Low-voltage ion wind generator and positive output voltage control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216086484U true CN216086484U (en) | 2022-03-18 |
Family
ID=80639746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122510231.5U Active CN216086484U (en) | 2021-10-18 | 2021-10-18 | Low-voltage ion wind generator and positive output voltage control circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216086484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024093175A1 (en) * | 2022-10-31 | 2024-05-10 | 广东美的制冷设备有限公司 | Streamer discharge driving apparatus, purification device, and streamer discharge driving control method |
-
2021
- 2021-10-18 CN CN202122510231.5U patent/CN216086484U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024093175A1 (en) * | 2022-10-31 | 2024-05-10 | 广东美的制冷设备有限公司 | Streamer discharge driving apparatus, purification device, and streamer discharge driving control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9768700B2 (en) | Hysteretic-mode pulse frequency modulated (HM-PFM) resonant AC to DC converter | |
| JP5701283B2 (en) | Charger | |
| EP1727265B1 (en) | Dc-dc converter | |
| US9667153B2 (en) | Switching power supply apparatus for generating control signal for lowering switching frequency of switching devices | |
| US20140140113A1 (en) | Ac-dc resonant converter that provides high efficiency and high power density | |
| EP2448098A2 (en) | Power supply with single stage converter for performing power factor correction and resonant conversion | |
| US11396241B2 (en) | Power converter controlled capacitor circuits and methods | |
| JP2006067730A (en) | Power factor improving circuit | |
| EP2688189A1 (en) | Hybrid adaptive power factor correction schemes for switching power converters | |
| JP7001896B2 (en) | DC-DC converter | |
| KR20150083039A (en) | Cable compensation by zero-crossing compensation current and resistor | |
| US20210091678A1 (en) | Control method and control circuit | |
| JP2010041891A (en) | Charger | |
| CN216086484U (en) | Low-voltage ion wind generator and positive output voltage control circuit thereof | |
| JPH1198685A (en) | Game machine power supply circuit | |
| CN113189910A (en) | Miniature programmable pulse high-voltage source | |
| CN106533210B (en) | A kind of single-phase falling-rising pressure type AC-DC converter and its control method | |
| CN115995970A (en) | High-voltage ion wind generator, negative output voltage control method and circuit thereof | |
| CN216122221U (en) | Low-voltage ion wind generator and negative output voltage control circuit thereof | |
| CN216122220U (en) | High-voltage ion wind generator and positive output voltage control circuit thereof | |
| CN216122222U (en) | High-voltage ion wind generator and negative output voltage control circuit thereof | |
| CN115995968A (en) | Low-voltage ion wind generator, positive output voltage control method and circuit thereof | |
| CN115995969A (en) | Low-voltage ion wind generator, negative output voltage control method and circuit thereof | |
| US5877610A (en) | Multiple cell boost converter | |
| CN115995971A (en) | High-voltage ion wind generator, positive output voltage control method and circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |