CN209250493U - A kind of switching power unit - Google Patents
A kind of switching power unit Download PDFInfo
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- CN209250493U CN209250493U CN201821714423.XU CN201821714423U CN209250493U CN 209250493 U CN209250493 U CN 209250493U CN 201821714423 U CN201821714423 U CN 201821714423U CN 209250493 U CN209250493 U CN 209250493U
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Abstract
The utility model discloses a kind of switching power units, including processor, high-frequency inversion bridge, high frequency transformer, rectification circuit, waveform convertion circuit and waveform convertion driving circuit, the control terminal of high-frequency inversion bridge is connect by high-frequency inversion driving circuit with processor signal；High-frequency inversion bridge is used to adjust the input waveform of power supply, converts waves AC for direct current wave；High frequency transformer is used for the input terminal and output end of isolating switch power device, and energy is transmitted to secondary side from primary side；Rectification circuit is used to adjust the waveform of input voltage；The input terminal and output end of waveform convertion driving circuit are electrically connected with the control terminal of processor and waveform convertion circuit respectively, and waveform convertion driving circuit is used for drive waveforms translation circuit；Waveform convertion circuit is used to that input waveform to be transformed to required output waveform according to the driving signal of waveform convertion driving circuit.The switching power unit energy output voltage and current waveform, the accurate duration for controlling wavelength, meet higher voltage-withstand test, realize high-power output, adapt to plurality of application scenes.
Description
Technical Field
The utility model relates to a power technology field, concretely relates to switching power supply device.
Background
The power supply is a device for providing power for electronic equipment, and is widely applied to the fields of industrial automatic control, military equipment, scientific research equipment, industrial control equipment, computers and computers, communication equipment, power equipment, instruments and meters, medical equipment, semiconductor refrigeration and heating and the like.
The power supply comprises a direct current power supply and an alternating current power supply, wherein the direct current power supply is used for providing a power supply with constant current, and the alternating current power supply is used for providing a power supply with stable voltage and stable frequency. The user selects to use the direct current power supply or the alternating current power supply according to different fields.
Due to different application scenes, the direct current power supply and the alternating current power supply cannot simultaneously meet different application scenes, so that the specification and the model of the direct current power supply and the specification and the model of the alternating current power supply are various. There are dozens of direct current power supplies for different application scenarios, such as AC/DC power supplies, DC/DC power supplies, radio station power supplies, communication power supplies, special power supplies, and the like. The AC/DC power supply obtains energy from a power grid, and outputs one or more stable direct-current voltages through high-voltage rectification and filtering. Even a simple AC/DC power supply requires different types of AC/DC power supplies for different application scenarios due to different requirements for the waveform, pulse width and amplitude of the output DC voltage, so that users have to purchase various types of power supplies to meet different requirements.
The market is only provided with power supplies which can output direct current and alternating current, and the power supplies are not suitable for low-power supplies below safe voltage and high-power supplies above the safe voltage, so that users can meet the requirements of different application scenes on voltage, current and the like by purchasing power supplies of various types, the use is inconvenient, and the cost of the users is directly increased.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a switching power supply device for it is weak to solve current power adaptability, causes the inconvenient problem of use, cost increase for the user.
In order to achieve the above object, an embodiment of the present invention provides a switching power supply device, which includes a processor, a high-frequency inverter bridge, a high-frequency transformer, a rectifier circuit, a waveform conversion circuit, and a waveform conversion driving circuit, wherein a control end of the high-frequency inverter bridge is connected to the processor via a high-frequency inverter driving circuit, and the high-frequency inverter bridge, the high-frequency transformer, the rectifier circuit, and the waveform conversion circuit are electrically connected in sequence;
the high-frequency inverter bridge is used for adjusting the input waveform of the power supply and converting direct current waves into alternating current waves;
the high-frequency transformer is used for isolating the input end and the output end of the switch power supply device and simultaneously transmitting energy from the primary side to the secondary side;
the rectifying circuit is used for adjusting the waveform of the input voltage;
the input end and the output end of the waveform conversion driving circuit are respectively and electrically connected with the processor and the control end of the waveform conversion circuit, and the waveform conversion driving circuit is used for driving the waveform conversion circuit;
the waveform conversion circuit is used for converting an input waveform into a required output waveform according to a driving signal of the waveform conversion driving circuit.
The waveform conversion circuit comprises four switching tubes, the control ends of the four switching tubes are electrically connected with the output end of the waveform conversion driving circuit, the first ends of a first switching tube Q1 and a third switching tube Q3 are electrically connected with the output end Vo1 of the rectification circuit, the second end of the first switching tube Q1 and the first end of a second switching tube Q2 are electrically connected with the output end V of the waveform conversion circuit, and the second end of the third switching tube Q3 and the first end of a fourth switching tube Q4 are electrically connected with the output end V + of the waveform conversion circuit; the second end of the second switching tube Q2 and the second end of the fourth switching tube Q4 are electrically connected to the output end Vgnd of the rectifying circuit.
The waveform conversion circuit comprises a switch tube, the control end of the switch tube is electrically connected with the output end of the waveform conversion driving circuit, the first end of the switch tube is electrically connected with the output end Vo1 of the rectification circuit, the second end of the switch tube is electrically connected with the output end V + of the waveform conversion circuit, and the output end Vgnd of the rectification circuit is used as the output end V-of the waveform conversion circuit.
The switch tube is an MOS tube, an IGBT tube or a triode.
Preferably, the switching power supply device further includes a power supply voltage sampling unit, an output end of the power supply voltage sampling unit is electrically connected to an input end of the processor, and the processor adjusts the driving of the high-frequency inverter bridge according to the voltage value of the power supply obtained by the power supply voltage sampling unit.
Preferably, the switching power supply device further comprises a PFC circuit and a voltage-current sampling circuit, an input end and an output end of the PFC circuit are electrically connected to the power supply and an input end of the high-frequency inverter bridge, respectively, and a control end of the PFC circuit is electrically connected to the processor; the output end of the voltage and current sampling circuit is electrically connected with the input end of the processor, and the voltage and current sampling circuit is used for collecting the voltage and the current at the output end of the rectifying circuit and transmitting a voltage and current sampling value to the processor; and the processor adjusts the output of the high-frequency inverter bridge according to the voltage and current sampling value.
Preferably, the switching power supply device further includes an EMI circuit having an input terminal and an output terminal electrically connected to a power supply and an input terminal of the PFC circuit, respectively, and the EMI is configured to reduce electromagnetic interference.
Preferably, the switching power supply device further comprises an upper computer, wherein the output end of the upper computer is electrically connected with the input end of the processor, and the upper computer is used for man-machine interaction and inputting parameters to the processor.
Wherein, the input power supply is commercial power or a 380V power supply.
The embodiment of the utility model provides a have following advantage:
the embodiment of the utility model provides a switching power supply device passes through treater control high frequency contravariant bridge, high frequency contravariant bridge will adjust the waveform of input power, after rectifier circuit rectification, by the required waveform of waveform transformation circuit transform output again, and waveform transformation circuit is driven by the treater through waveform transformation drive circuit, can control the waveform accuracy that waveform transformation circuit outputs at the millisecond level, and the treater control Pulse Width Modulation (PWM) part of high frequency contravariant bridge, obtain the positive half-wave of sine wave or square wave at waveform transformation circuit's input, can obtain independent positive direction voltage after waveform transformation circuit transform, independent negative direction voltage, positive direction pulse waveform, negative direction pulse waveform, positive direction negative direction combination pulse waveform, the upper half of sine wave, the latter half of sine wave or complete sine wave, and can adjust the duration of waveform, the processor, the high-frequency inverter bridge, the rectifier circuit and the waveform conversion circuit are matched with each other to obtain voltage and current waveforms of different types accurately, so that different application scenes are met, the application range of the switching power supply device is expanded, a user only needs to buy one switching power supply device, the strict requirements of an airport on LED flicker frequency, duration, lamp brightness and light intensity can be met, and the requirements of electroplating occasions on positive and negative voltage waveforms can be met. In addition, the switching power supply device not only can meet the application scene of low power, but also can isolate the input and the output of the switching power supply device through a high-frequency transformer, so that the switching power supply device meets the withstand voltage test of 2000Vac or higher, and the high-power output of more than 20kW is realized. In addition, the switching power supply device controls the waveform duration, frequency and waveform quantity through the processor, avoids deviation caused by artificial interference, improves the performance and quality of products, and improves the quality and positioning of customer products.
As the utility model discloses a preferred embodiment, the output that the high frequency contravariant bridge was adjusted to the voltage value that the treater obtained the power through mains voltage sampling unit makes waveform transformation circuit's input obtain more accurate input waveform to improve switching power supply unit output waveform's precision.
As another more preferred embodiment of the present invention, the switching power supply device sets up the PFC circuit and the voltage current sampling circuit, and the voltage current sampling circuit is used for obtaining the voltage current value of the input end of the waveform conversion circuit, and feeds back the voltage current value to the processor, and the processor adjusts the output waveform of the high-frequency inverter bridge according to the voltage current value of the feedback, further improves the precision of the input waveform of the input end of the waveform conversion circuit, thereby further improving the precision of the output waveform of the switching power supply device.
As another preferred embodiment of the present invention, the switching power supply device is provided with an EMI circuit between the power supply and the PFC circuit, and the EMI circuit can reduce the interference of the power supply and other peripheral electronic products to the switching power supply device, and reduce the interference of the switching power supply device to the power grid.
As the utility model discloses another preferred embodiment, switching power supply unit still includes the host computer, and the host computer, the user passes through the parameter of the required waveform of host computer input, and the required waveform of parameter control high frequency inverter bridge, waveform transformation circuit output according to user input is controlled to the treater, and full automation has improved efficiency and uniformity, has improved the quality of product.
Drawings
Fig. 1 is a schematic structural diagram of a switching power supply device according to embodiment 1 of the present invention.
Fig. 2 is a structural diagram of a waveform conversion circuit in a switching power supply device according to embodiment 1 of the present invention.
Fig. 3 is a waveform diagram of the forward dc voltage output by the switching power supply device according to embodiment 1 of the present invention.
Fig. 4 is a waveform diagram of a negative dc voltage output by a switching power supply device according to embodiment 1 of the present invention.
Fig. 5 is a waveform diagram of a forward pulse dc voltage output by the switching power supply device according to embodiment 1 of the present invention.
Fig. 6 is a waveform diagram of negative-going pulse dc voltage output by the switching power supply device according to embodiment 1 of the present invention.
Fig. 7 is a waveform diagram of a dc voltage of a combination of positive pulses and negative pulses output by the switching power supply device according to embodiment 1 of the present invention.
Fig. 8 is a waveform diagram of a sine wave output by the switching power supply device according to embodiment 1 of the present invention.
Fig. 9 is a schematic structural diagram of a switching power supply device according to embodiment 2 of the present invention.
In the figure: the method comprises the following steps of 1-a processor, 2-a high-frequency inverter bridge, 3-a high-frequency transformer, 4-a rectifying circuit, 5-a waveform conversion circuit, 6-a waveform conversion driving circuit, 7-a high-frequency inverter driving circuit, 8-a power supply voltage sampling unit, 9-a PFC circuit, 10-a voltage and current sampling circuit, 11-an EMI circuit, 12-an upper computer and 13-a power supply.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
Example 1
The present embodiment provides a switching power supply device. As shown in fig. 1, the switching power supply device includes a processor 1, a high-frequency inverter bridge 2, a high-frequency transformer 3, a rectifier circuit 4, a waveform conversion circuit 5, and a waveform conversion drive circuit 6, wherein a control end of the high-frequency inverter bridge 2 is signal-connected to the processor 1 via a high-frequency inverter drive circuit 7, and the high-frequency inverter bridge 2, the high-frequency transformer 3, the rectifier circuit 4, and the waveform conversion circuit 5 are electrically connected in this order. Wherein,
the high-frequency inverter bridge 2 is used for adjusting the input waveform of the power supply and converting direct current waves into alternating current waves. In this embodiment, the power supply is commercial power or 380V power supply, but other types of power supplies may be used. The present embodiment is described with the commercial power as the power source.
The high-frequency transformer 3 is used for isolating the input end and the output end of the switch power supply device and simultaneously transmitting energy from the primary side to the secondary side, so that the switch power supply device meets the withstand voltage test of 2000Vac or higher, and high-power output of more than 20kW is realized.
The rectifier circuit 4 is used to adjust the waveform of the input voltage. The rectifying circuit 4 may be a rectifying circuit commonly used in the art, and is well known in the art, and will not be described in detail herein.
The input end and the output end of the waveform conversion driving circuit 6 are respectively and electrically connected with the processor 1 and the control end of the waveform conversion circuit 5, the processor 1 outputs a waveform driving signal to the waveform conversion driving circuit 6, and the waveform conversion driving circuit 6 drives the waveform conversion circuit 5 according to the driving signal of the processor 1.
The waveform conversion circuit 5 converts an input waveform into a desired output waveform in accordance with a drive signal of the waveform conversion drive circuit 6.
As shown in fig. 2, the waveform conversion circuit 5 includes four switching tubes Q1, Q2, Q3, Q4, and control terminals of the four switching tubes Q1, Q2, Q3, Q4 are electrically connected to the output terminal of the waveform conversion driving circuit 6. The first ends of the first switch tube Q1 and the third switch tube Q3 are electrically connected with the output end Vo1 of the rectification circuit, the second end of the first switch tube Q1 and the first end of the second switch tube Q2 are electrically connected with the output end V-of the waveform transformation circuit, and the second end of the third switch tube Q3 and the first end of the fourth switch tube Q4 are electrically connected with the output end V + of the waveform transformation circuit; the second end of the second switching tube Q2 and the second end of the fourth switching tube Q4 are electrically connected to the output end Vgnd of the rectifying circuit.
In this embodiment, the switching tube is a switching device such as, but not limited to, a MOS tube, an IGBT tube, or a triode.
Preferably, the switching power supply device further comprises a power supply voltage sampling unit 8, an output end of the power supply voltage sampling unit 8 is electrically connected with an input end of the processor 1, and the processor 1 adjusts the driving of the high-frequency inverter bridge 2 according to the voltage value of the power supply obtained by the power supply voltage sampling unit 8, so that the input end of the waveform transformation circuit 5 obtains a more accurate input waveform, and the accuracy of the output waveform of the switching power supply device is improved.
Further preferably, the switching power supply device further comprises a PFC circuit 9 and a voltage-current sampling circuit 10, wherein an input end and an output end of the PFC circuit 9 are respectively and electrically connected to the power supply and an input end of the high-frequency inverter bridge 2, and a BUS current sampling output end of the PFC circuit 9 is electrically connected to the processor 1 and is used for transmitting the acquired current value to the processor 1; the output end of the voltage and current sampling circuit 10 is electrically connected with the input end of the processor 1, and the voltage and current sampling circuit 10 is used for collecting the voltage and the current at the output end of the rectification circuit 4 and transmitting a voltage and current sampling value to the processor 1; the processor 1 adjusts the output waveform of the high-frequency inverter bridge 2 according to the voltage and current sampling value, and further improves the precision of the input waveform of the input end of the waveform conversion circuit, thereby further improving the precision of the output waveform of the switching power supply device.
As a preferred embodiment of this embodiment, the switching power supply device further includes an EMI circuit 11, and an input terminal and an output terminal of the EMI circuit 11 are electrically connected to the power supply and an input terminal of the PFC circuit 9, respectively, so that the EMI circuit 11 can reduce interference of the power supply and other peripheral electronic products to the switching power supply device, and reduce interference of the switching power supply device to the power grid.
As shown in fig. 1, the switching power supply device further includes an upper computer 12, an output end of the upper computer 12 is electrically connected with an input end of the processor 1, the upper computer 12 is used for man-machine interaction and inputting parameters to the processor 1, the processor 1 controls the high-frequency inverter bridge 2 and the waveform transformation circuit 5 to output required waveforms according to the parameters input by a user, and the whole process is automatically controlled, so that the efficiency and the consistency are improved, and the quality of products is improved.
The switching power supply device provided by the embodiment can obtain a plurality of output waveforms on the aspect of maintaining the characteristics of the switching power supply. Such as: a single positive voltage, a single negative voltage, a positive pulse wave, a positive and negative pulse wave, and a sine wave.
The control process of the switching power supply device to obtain different waveforms is described in detail below.
As shown in fig. 3, when the user needs the switching power supply device to output a forward dc waveform, the processor 1 outputs a control signal to simultaneously open the second switching tube Q2 and the third switching tube Q3 of the waveform converting circuit 5 through the waveform converting driving circuit 6, and the output terminal V + of the waveform converting circuit 5 outputs a single forward dc voltage to the output terminal V-.
In the output waveform of the waveform converting circuit 5, the soft start time t1, the dc time t2, the output voltage V, and the number of output pulses are set by the host computer 12.
As shown in fig. 4, when a user needs to output a negative dc waveform from the switching power supply device, the processor 1 outputs a control signal to simultaneously turn on the first switch Q1 and the fourth switch Q4 of the waveform converting circuit 5 through the waveform converting driving circuit 6, and the output terminal V + of the waveform converting circuit 5 outputs a single negative dc voltage to the output terminal V-.
In the output waveform of the waveform converting circuit 5, the soft start time t1, the dc time t2, the output voltage V — and the number n of output pulses are set by the host computer 12.
As shown in fig. 5, when the user needs the switching power supply device to output a forward pulse dc voltage waveform, the processor 1 outputs a control signal, and the waveform conversion driving circuit 6 simultaneously opens the second switching tube Q2 and the third switching tube Q3 in the waveform conversion circuit 5, and after the time t1 when the voltage needs to be output is satisfied, the second switching tube Q2 and the third switching tube Q3 are closed, and when the closing time of the second switching tube Q2 and the third switching tube Q3 reaches t2, the second switching tube Q2 and the third switching tube Q3 are opened again, and the next pulse is output. The output end V + of the waveform conversion circuit 5 outputs an independent forward pulse direct current voltage to the output end V-, wherein the pulse time t1, the turn-off time t2 and the output voltage V in the output waveform of the waveform conversion circuit 5 can be set by the upper computer 12.
As shown in fig. 6, when the user needs the switching power supply device to output a negative-going pulse waveform, the processor 1 outputs a control signal, the waveform conversion driving circuit 6 simultaneously turns on the first switching tube Q1 and the fourth switching tube Q4 in the waveform conversion circuit 5, and after the time t1 that the required output voltage is met, the first switching tube Q1 and the fourth switching tube Q4 are turned off; when the closing time reaches t2, the first switch tube Q1 and the fourth switch tube Q4 are opened again, and the next pulse is output. The output end V + of the waveform conversion circuit 5 outputs independent negative pulse direct-current voltage to the output end V-, wherein the pulse time t1, the turn-off time t2 and the output voltage V can be set by the upper computer 12.
As shown in fig. 7, when the user needs the switching power supply device to output a dc voltage with a waveform of a combination of positive and negative pulses, the processor 1 outputs a control signal to simultaneously turn on the second switching tube Q2 and the third switching tube Q3 in the waveform converting circuit 5 through the waveform converting driving circuit 6, and turns off the second switching tube Q2 and the third switching tube Q3 after the time of outputting the voltage reaches t 1; when the closing time reaches t2, the second switching tube Q2 and the third switching tube Q3 are opened again, the positive pulses are output according to the above mode, after the output number of the positive pulses reaches the preset n, when the negative pulses are prepared to be output, the first switching tube Q1 and the fourth switching tube Q4 are opened simultaneously, and when the time of the output voltage reaches t3, the first switching tube Q1 and the fourth switching tube Q4 are closed; when the closing time reaches t4, the first switch tube Q1 and the fourth switch tube Q4 are opened at the same time again; and circulating the steps until the quantity of the output negative pulse waveforms reaches a preset value n, and closing the output. And the output end V + of the waveform conversion circuit 5 outputs a direct-current voltage combining positive pulses and negative pulses to the output end V-. The first switch Q1 and the fourth switch Q4 are turned on or off at the same time, the second switch Q2 and the third switch Q3 are turned on or off at the same time, and the two sets of switches cannot be turned on at the same time.
As shown in fig. 8, when the user needs the switching power supply device to output a sine waveform, the processor 1 controls the PWM of the high frequency inverter part to continuously generate the upper half waveform of the sine wave between Vo1 and Vgnd, and at the same time, during the upper half cycle of the input sine wave, the processor 1 outputs a control signal to simultaneously turn on the second switching tube Q2 and the third switching tube Q3 in the waveform converting circuit 5 through the waveform converting driving circuit 6, and at this time, the output terminal V + to the output terminal V-is a sine wave of the upper half cycle. In the negative half cycle time of the input sine wave, the processor 1 outputs a control signal, the waveform conversion driving circuit 6 enables the second switching tube Q2 and the third switching tube Q3 in the waveform conversion circuit 5 to be closed, the fourth switching tube Q4 and the first switching tube Q1 are opened at the same time, and the output end V + is a negative sine wave to the output end V-. Through the repeated opening and closing of the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4 and the first switch tube Q1, a stable and continuous sine wave is finally formed between the output end V + and the output end V-.
Example 2
The present embodiment provides another switching power supply device. As shown in fig. 9, the switching power supply device includes a processor 1, a high-frequency inverter bridge 2, a high-frequency transformer 3, a rectifier circuit 4, a waveform conversion circuit 5, a waveform conversion drive circuit 6, a PFC circuit 9, a voltage-current sampling circuit 10, and an EMI circuit 11, wherein a control end of the high-frequency inverter bridge 2 is connected to the processor 1 through a high-frequency inverter drive circuit 7, and the EMI circuit 11, the PFC circuit 9, the high-frequency inverter bridge 2, the high-frequency transformer 3, the rectifier circuit 4, and the waveform conversion circuit 5 are electrically connected in sequence. The structures of the EMI circuit 11, the PFC circuit 9, the high-frequency inverter bridge 2, the high-frequency transformer 3, and the rectifier circuit 4 are the same as those in embodiment 1 except for the waveform conversion circuit 5, and are not described herein again.
In this embodiment, the waveform converting circuit 5 includes a switching tube Q, a control end of the switching tube Q is electrically connected to the output end of the waveform converting driving circuit 6, a first end of the switching tube Q is electrically connected to the output end Vo1 of the rectifying circuit 4, a second end of the switching tube Q is electrically connected to the output end V + of the waveform converting circuit 5, and the output end Vgnd of the rectifying circuit 4 is used as the output end V-of the waveform converting circuit 5.
The present embodiment is described by taking a triode as an example, but this does not mean that other switching devices such as a MOS transistor, an IGBT transistor, etc. cannot be used in the present embodiment.
The base of the switching tube Q is electrically connected with the output end of the waveform conversion driving circuit 6, the collector of the switching tube Q is electrically connected with the output end Vo1 of the rectifying circuit 4, the emitter of the switching tube Q is electrically connected with the output end V + of the waveform conversion circuit 5, and the output end Vgnd of the rectifying circuit 4 is used as the output end V-of the waveform conversion circuit 5.
The waveform conversion circuit 5 of this embodiment has the same working principle as the waveform switch conversion circuit 5 of embodiment 1, and the processor 1 controls the waveform conversion driving circuit 6 to turn on or off the switching tube Q in the waveform driving circuit 5, so as to obtain different output waveforms, and therefore, the description thereof is omitted.
The switching power supply device provided by this embodiment controls the high-frequency inverter bridge through the processor, the high-frequency inverter bridge adjusts the waveform of the input power supply, the waveform is rectified by the rectifier circuit and then converted by the waveform conversion circuit, the waveform conversion circuit is driven by the processor through the waveform conversion driving circuit, the waveform output by the waveform conversion circuit can be accurately controlled to millisecond level, the processor controls the Pulse Width Modulation (PWM) part of the high-frequency inverter bridge, the sine wave or the positive half wave of the square wave is obtained at the input end of the waveform conversion circuit, the single positive voltage, the single negative voltage, the positive pulse waveform, the negative pulse waveform, the positive negative combined pulse waveform, the upper half sine wave, the lower half sine wave or the complete sine wave can be obtained after the conversion of the waveform conversion circuit, and the duration of the waveform can be adjusted, namely, the waveform is rectified by the processor, The high-frequency inverter bridge, the rectifier circuit and the waveform conversion circuit are matched with each other to obtain voltage and current waveforms of different types accurately, so that different application scenes are met, the application range of the switching power supply device is expanded, a user only needs to buy one switching power supply device, the strict requirements of an airport on LED flicker frequency, duration, lamp brightness and light intensity can be met, and the requirements of an electroplating occasion on positive and negative voltage waveforms can be met. In addition, the switching power supply device not only can meet the application scene of low power, but also can isolate the input and the output of the switching power supply device through a high-frequency transformer, so that the switching power supply device meets the withstand voltage test of 2000Vac or higher, and the high-power output of more than 20kW is realized. In addition, the switching power supply device controls the waveform duration, frequency and waveform quantity through the processor, avoids deviation caused by artificial interference, improves the performance and quality of products, and improves the quality and positioning of customer products.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A switching power supply device is characterized by comprising a processor, a high-frequency inverter bridge, a high-frequency transformer, a rectifying circuit, a waveform conversion circuit and a waveform conversion driving circuit, wherein the control end of the high-frequency inverter bridge is in signal connection with the processor through the high-frequency inverter driving circuit, and the high-frequency inverter bridge, the high-frequency transformer, the rectifying circuit and the waveform conversion circuit are sequentially and electrically connected;
the high-frequency inverter bridge is used for adjusting the input waveform of the power supply and converting direct current waves into alternating current waves;
the high-frequency transformer is used for isolating the input end and the output end of the switch power supply device and transmitting energy from the primary side to the secondary side;
the rectifying circuit is used for adjusting the waveform of the input voltage;
the input end and the output end of the waveform conversion driving circuit are respectively and electrically connected with the processor and the control end of the waveform conversion circuit, and the waveform conversion driving circuit is used for driving the waveform conversion circuit;
the waveform conversion circuit is used for converting an input waveform into a required output waveform according to a driving signal of the waveform conversion driving circuit.
2. The switching power supply device according to claim 1, wherein the waveform converting circuit comprises four switching tubes, control ends of the four switching tubes are electrically connected with an output end of the waveform converting driving circuit, first ends of a first switching tube Q1 and a third switching tube Q3 are electrically connected with an output end Vo1 of the rectifying circuit, a second end of the first switching tube Q1 and a first end of a second switching tube Q2 are electrically connected with an output end V "of the waveform converting circuit, and a second end of the third switching tube Q3 and a first end of a fourth switching tube Q4 are electrically connected with an output end V + of the waveform converting circuit; the second end of the second switching tube Q2 and the second end of the fourth switching tube Q4 are electrically connected to the output end Vgnd of the rectifying circuit.
3. The switching power supply device according to claim 1, wherein the waveform converting circuit includes a switching tube, a control terminal of the switching tube is electrically connected to the output terminal of the waveform converting driving circuit, a first terminal of the switching tube is electrically connected to the output terminal Vo1 of the rectifying circuit, a second terminal of the switching tube is electrically connected to the output terminal V + of the waveform converting circuit, and the output terminal Vgnd of the rectifying circuit is used as the output terminal V-of the waveform converting circuit.
4. The switching power supply device according to claim 2 or 3, wherein the switching tube is a MOS tube, an IGBT tube or a triode.
5. The switching power supply device according to claim 1, further comprising a power supply voltage sampling unit, wherein an output terminal of the power supply voltage sampling unit is electrically connected to an input terminal of the processor, and the processor adjusts driving of the high-frequency inverter bridge according to the voltage value of the power supply obtained by the power supply voltage sampling unit.
6. The switching power supply device according to claim 5, further comprising a PFC circuit and a voltage-current sampling circuit, wherein an input terminal and an output terminal of the PFC circuit are electrically connected to the power supply and an input terminal of the high-frequency inverter bridge, respectively, and a signal output terminal of the PFC circuit is electrically connected to the processor; the output end of the voltage and current sampling circuit is electrically connected with the input end of the processor, and the voltage and current sampling circuit is used for collecting the voltage and the current at the output end of the rectifying circuit and transmitting a voltage and current sampling value to the processor; and the processor adjusts the output of the high-frequency inverter bridge according to the voltage and current sampling value.
7. The switching power supply unit according to claim 6, further comprising an EMI circuit having an input terminal and an output terminal electrically connected to a power supply and an input terminal of the PFC circuit, respectively, the EMI circuit being configured to reduce electromagnetic interference.
8. The switching power supply device according to claim 1, further comprising an upper computer, wherein an output end of the upper computer is electrically connected with an input end of the processor, and the upper computer is used for human-computer interaction and inputting parameters to the processor.
9. The switching power supply unit according to claim 1, wherein the power supply is a commercial power or a 380V power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821714423.XU CN209250493U (en) | 2018-10-22 | 2018-10-22 | A kind of switching power unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821714423.XU CN209250493U (en) | 2018-10-22 | 2018-10-22 | A kind of switching power unit |
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| CN209250493U true CN209250493U (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378983A (en) * | 2018-10-22 | 2019-02-22 | 金华诚科技(深圳)有限公司 | A kind of power supply device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378983A (en) * | 2018-10-22 | 2019-02-22 | 金华诚科技(深圳)有限公司 | A kind of power supply device |
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