CN210351016U - Power supply circuit and power supply equipment - Google Patents
Power supply circuit and power supply equipment Download PDFInfo
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- CN210351016U CN210351016U CN201921386582.6U CN201921386582U CN210351016U CN 210351016 U CN210351016 U CN 210351016U CN 201921386582 U CN201921386582 U CN 201921386582U CN 210351016 U CN210351016 U CN 210351016U
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Abstract
The utility model relates to a power technical field discloses a power supply circuit and power supply unit. The power circuit comprises a transformer module, a switching circuit and a control circuit, wherein the transformer module comprises a primary winding and a secondary winding, the primary winding is coupled with the secondary winding, the primary winding is used for coupling alternating-current voltage to the secondary winding, the switching circuit is connected with the secondary winding, and the control circuit is connected with the switching circuit and is used for controlling the working state of the switching circuit so as to adjust the equivalent turn ratio of the primary winding to the secondary winding. The equivalent turn ratio of the primary winding and the secondary winding of the transformer module is adjustable, alternating current voltage can be converted into different voltages to be output, the adjustment range of the output voltage can be widened by adjusting the equivalent turn ratio, and large power output can be kept in a wide output voltage range.
Description
Technical Field
The utility model relates to a power technical field especially relates to a power supply circuit and power supply unit.
Background
At present, in order to ensure that a power supply device can provide a large output power in a wide direct current voltage range, the number or capacity of power devices of an isolation transformer is generally redundant, however, the method inevitably causes the increase of cost and the increase of volume.
SUMMERY OF THE UTILITY MODEL
To solve the above technical problem, an object of the embodiments of the present invention is to provide a power supply circuit and a power supply apparatus, which can widen the adjustment range of an output voltage and maintain a large power output in a wide output voltage range, with the addition of a few circuits and cost.
In a first aspect, an embodiment of the present invention provides a power supply circuit, including:
a transformer module comprising a primary winding and a secondary winding, the primary winding coupled with the secondary winding, the primary winding for coupling an alternating voltage to the secondary winding;
a switching circuit connected to the secondary winding;
and the control circuit is connected with the switching circuit and used for controlling the working state of the switching circuit so as to adjust the equivalent turn ratio of the primary winding and the secondary winding.
Optionally, in the secondary winding, the number of turns of the secondary coil coupling the alternating voltage is adjustable.
Optionally, the transformer module comprises at least two transformers, primary windings of the at least two transformers are connected in parallel with each other, and secondary windings of the at least two transformers are connected in series with each other.
Optionally, the switching circuit comprises:
the switch tube comprises a switch tube input end, a switch tube output end and a switch tube control end, and the control circuit is connected to the switch tube control end;
the relay comprises a relay input end, a relay output end and a relay control end, wherein the relay input end is connected with the switch tube input end, the relay output end is connected with the switch tube output end, and the control circuit is connected to the relay control end.
Optionally, the power circuit further includes an inverter circuit, and the inverter circuit is connected to the primary winding of the transformer module.
Optionally, the power supply circuit further includes a rectifying and filtering circuit, and the rectifying and filtering circuit is respectively connected to the switching circuit and the secondary winding, and is configured to perform rectifying and filtering processing on the coupled ac voltage and output a dc voltage.
Optionally, the power circuit further includes a sampling circuit, and the sampling circuit is connected to the control circuit and is configured to collect an electrical signal output by the rectifying and filtering circuit, so that the control circuit adjusts the output of the inverter circuit according to the electrical signal.
Optionally, the power supply circuit further includes an overcurrent protection circuit, where the overcurrent protection circuit is connected to the control circuit and is configured to collect a current signal flowing into the transformer module, so that the control circuit adjusts and outputs the output of the inverter circuit according to the current signal.
Optionally, the control circuit comprises:
a controller;
the switch driving circuit is respectively connected with the switch circuit and the controller and is used for driving the switch circuit to work;
and the inverter driving circuit is respectively connected with the inverter circuit and the controller and is used for driving the inverter circuit to work.
In a second aspect, an embodiment of the present invention provides a power supply apparatus, including the power supply circuit.
The utility model has the advantages that: compared with the prior art, the utility model provides an among the power supply circuit, the transformer module includes primary and secondary, primary and secondary coupling, and primary is used for coupling alternating voltage to secondary, and switch circuit is connected with secondary, and control circuit is connected with switch circuit for control switch circuit's operating condition to adjust primary and secondary equivalent turns ratio between them. The equivalent turn ratio of the primary winding and the secondary winding is adjustable, so that alternating voltage can be converted into different voltages to be output, and under the condition that the capacity of the inverter circuit is not changed, the adjustment range of the output voltage can be widened and large power output can be kept in a wide output voltage range by adjusting the equivalent turn ratio.
Drawings
The embodiments are illustrated by way of example only in the accompanying drawings, in which like reference numerals refer to similar elements and which are not to be construed as limiting the embodiments, and in which the figures are not to scale unless otherwise specified.
Fig. 1 is a schematic circuit block diagram of a power circuit according to an embodiment of the present invention;
FIG. 2 is a schematic block circuit diagram of a control circuit provided in FIG. 1;
fig. 3 is a schematic circuit diagram of a power circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a transformer module according to another embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a switching circuit according to another embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a switching circuit according to another embodiment of the present invention;
fig. 7 is a circuit configuration schematic diagram of the switching circuit provided in fig. 3.
Detailed Description
To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power circuit according to an embodiment of the present invention. As shown in fig. 1, the power supply circuit 100 includes an inverter circuit 10, a transformer module 20, a switch circuit 30, a rectifying and filtering circuit 40, a control circuit 50, a sampling circuit 60, and an overcurrent detection circuit 70.
In some embodiments, the input end of the inverter circuit 10 is connected to the dc power source 200, the output end of the inverter circuit 10 is connected to the primary winding of the transformer module, and the inverter circuit 10 is configured to convert the dc voltage output by the dc power source 200 into an ac voltage.
In order to meet different requirements of different electric equipment on performance parameters of the alternating current power supply, the inverter circuit 10 has developed various circuits, and can be divided into an active inverter circuit and a passive inverter circuit according to the going direction of output electric energy, wherein the electric energy output by the active inverter circuit returns to a public alternating current power grid, and the electric energy output by the passive inverter circuit is directly transmitted to the electric equipment.
The dc power supply 200 may be a battery, a dry battery, a solar cell, or the like.
In some embodiments, the transformer module 20 includes a primary winding and a secondary winding coupled to each other, the primary winding is coupled to the inverter circuit 10, and the primary winding is used for coupling the ac voltage output by the inverter circuit 10 to the secondary winding.
In some embodiments, the number of turns of the secondary coil of the secondary winding that couples the alternating voltage is adjustable.
In order to explain the embodiment of the present invention in detail, the following description is made with reference to fig. 3, and fig. 3 is a schematic circuit structure diagram of a power circuit provided by an embodiment of the present invention. As shown in fig. 3, the transformer module 20 includes a transformer T1 and a transformer T2, the transformer T1 is connected in parallel with the primary winding of the transformer T2 and is connected to the inverter circuit 10, the transformer T1 is connected in series with the secondary winding of the transformer T2, and one end of the secondary winding of the transformer T1 is connected to one end of the switching circuit 30.
Wherein, the transformer module 20 changes the equivalent coil turns in the secondary winding according to the working state of the switch circuit 30, thereby changing the equivalent turn ratio between the primary winding and the secondary winding of the transformer module 20, assuming that the number of turns in the primary winding and the number of turns in the secondary winding of the transformer module 20 are respectively N1 and N2, the ratio N1/N2 of N1 and N2 is equal to the ratio of the input voltage of the primary winding to the output voltage of the secondary winding and to the ratio of the current of the secondary winding to the current of the primary winding, and when the ratio N1/N2 is larger, it can be considered that the equivalent turn ratio is larger, and under the condition that the capacity of the inverter circuit 10 is not changed, the secondary winding can output larger current, the output voltage regulating range is widened, and meanwhile, large power output can be kept in a wide output voltage range.
Because the number of turns of the primary coil of the transformer module 20 is fixed and unchanged, the transformer module 20 determines the number of operations of the transformer connected to the circuit according to the operating state of the switch circuit 30 to change the number of turns of the equivalent secondary coil, so as to change the equivalent turn ratio between the primary winding and the secondary winding of the transformer module 20, and divide the output voltage into different operating sections.
Specifically, assuming that the numbers of turns of the secondary windings of the transformer T1 and the transformer T2 are the same, when the control circuit 50 controls the switching circuit 30 to operate in the on state, the secondary windings of the transformer T1 and the transformer T2 are connected in series, and the total number of turns of the secondary winding resulting in the coupled ac voltage is 2 × N2, and the output voltage is in the high-voltage range; when the output voltage is in the low-voltage range, the control circuit 50 controls the switching circuit 30 to operate in the off state, and the secondary winding of the transformer T1 is open, so that the total number of turns of the secondary winding coupled to the ac voltage is N2, and the output voltage is in the low-voltage range. Therefore, the control circuit 50 can switch between high voltage and low voltage by controlling the operating state of the switch circuit 30.
In some embodiments, as shown in fig. 3, the transformer module 20 includes two transformers, the primary windings of the two transformers are connected in parallel with each other, and the secondary windings of the two transformers are connected in series with each other.
It is to be understood that the number of transformers is not limited to two, and may be three or more.
In some embodiments, please refer to fig. 4, and fig. 4 is a schematic circuit structure diagram of a transformer module according to another embodiment of the present invention. As shown in fig. 4, the transformer module 20 may be a single transformer having a primary winding and a plurality of secondary windings connected in series.
In some embodiments, the switching circuit 30 includes a switch tube and a relay, the switch tube includes a switch tube input terminal, a switch tube output terminal, and a switch tube control terminal; the relay comprises a relay input end, a relay output end and a relay control end.
The switch tube control end and the relay control end are both connected to the control circuit 50, the switch tube input end is connected with the relay input end, and the switch tube output end is connected with the relay output end.
In some embodiments, referring to fig. 7, fig. 7 is a circuit structure diagram of the switch circuit provided in fig. 3. As shown in fig. 7, the switching tube may be any one of a MOS tube or an IGBT, and the relay may be an electromagnetic relay.
To explain the embodiment of the present invention in detail, it is assumed that the switching circuit 30 adopts a combination of a MOS transistor and an electromagnetic relay, as shown in fig. 7, wherein a source of the MOS transistor MOS1 is connected to one end of the secondary winding of the transformer T1 and an input end of the electromagnetic relay RY, a drain of the MOS transistor MOS1 is connected to a drain of the MOS transistor MOS2, and a source of the MOS transistor MOS2 is connected to an output end of the electromagnetic relay RY.
Specifically, the MOS transistor and the electromagnetic relay both function as a switch, and the control circuit 50 respectively provides a switching signal or a breaking signal to the control end of the switching transistor and the control end of the relay to coordinate the MOS transistor and the electromagnetic relay to complete on or off, so that the total loss of the switching circuit 30 can be reduced.
In some embodiments, as shown in fig. 7, the switching circuit 30 may be a combination of two MOS transistors or a combination of two IGBTs, or may be a combination of two MOS transistors, two IGBTs, and an electromagnetic relay.
In some embodiments, the rectifying and filtering circuit 40 is respectively connected to the switching circuit 30 and the secondary winding, and is configured to perform rectifying and filtering processing on the coupled ac voltage and output a dc voltage.
To illustrate the embodiments of the present invention in detail, referring to fig. 3, as shown in fig. 3, the rectifying-filtering circuit 40 includes a rectifying module 41 and a filtering module 42, the rectifying module 41 includes a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, a fourth rectifying diode D4, a fifth rectifying diode D5 and a sixth rectifying diode D6, cathodes of the first rectifying diode D1, the third rectifying diode D3 and the fifth rectifying diode D5 are connected to one input end of the filtering module 42, anodes of the second rectifying diode D2, the fourth rectifying diode D4 and the sixth rectifying diode D6 are connected to the other input end of the filtering module 42, an anode of the first rectifying diode D1 is connected to a cathode of the second rectifying diode D2 and forms a first rectifying node a, an anode of the third rectifying diode D3 is connected to a cathode of the fourth rectifying diode D4 and forms a second rectifying node B, and an anode of the fifth rectifying diode D5 is connected to a cathode of the sixth rectifying diode D6 and forms a third rectifying node C.
Specifically, when the switch circuit 30 is in the on state, the secondary winding of the transformer T1 is connected in series with the secondary winding of the transformer T2, so that a rectifier bridge composed of a first rectifier diode D1, the second rectifier diode D2, the fifth rectifier diode D5 and the sixth rectifier diode D6 is formed for rectification; when the switching circuit 30 is in the off state, the secondary winding of the transformer T1 is open, so that a rectifier bridge composed of the third rectifier diode D3, the fourth rectifier diode D4, the fifth rectifier diode D5 and the sixth rectifier diode D6 is formed for rectification.
It can be understood that, the rectifying module 41 of the rectifying and filtering circuit 40 firstly rectifies the input ac voltage to output a dc voltage, and the dc voltage output by the rectifying module 41 is generally a pulsating dc voltage, although the polarity is constant, the magnitude is fluctuated, and therefore, it needs to be regulated, that is, the rectifying module is connected in series with a filtering module 42, and after the dc voltage output by the rectifying module 41 is subjected to filtering processing, the smoothness is greatly improved, and the normal power demand of the electric equipment can be met.
In some embodiments, as shown in fig. 5, one of the two MOS transistors in the switching circuit 30 may be connected between the cathode of the first rectifying diode D1 and the cathode of the second rectifying diode D2, and the other is connected between the anode of the second rectifying diode D2 and the anode of the fourth rectifying diode D4.
It can be understood that, referring to fig. 6, fig. 6 is a schematic circuit structure diagram of a switching circuit according to another embodiment of the present invention. As shown in fig. 6, one of the two IGBTs of the switching circuit 30 may be connected between the cathode of the first rectifying diode D1 and the cathode of the second rectifying diode D2, and the other is connected between the anode of the second rectifying diode D2 and the anode of the fourth rectifying diode D4.
In some embodiments, the control circuit 50 is connected to the inverter circuit 10, the switch circuit 30, the sampling circuit 60, and the over-current detection circuit 70, respectively.
To illustrate the embodiment of the present invention in detail, referring to fig. 2, as shown in fig. 2, the control circuit includes a controller 51, a switch driving circuit 52 and an inverter driving circuit 53, the switch driving circuit 52 is respectively connected to the switch circuit 30 and the controller 51 for driving the switch circuit 30 to operate, and the inverter driving circuit 53 is respectively connected to the inverter circuit 10 and the controller 51 for driving the inverter circuit 10 to operate.
The controller 51 is a PID controller, which is a negative feedback loop component commonly used in industrial control applications, that compares the collected data to a reference value to obtain a difference value, which is then used to calculate a new input value for the purpose of allowing the data of the system to reach or remain at the reference value. Different from other simple control operations, the PID controller can adjust the input value according to the historical data and the occurrence rate of the difference value, so that the system is more accurate and more stable.
Specifically, the control circuit 50 controls the operating state of the switch circuit 30 according to the voltage value and the set value output by the sampling circuit 60. When switching from a low voltage interval to a high voltage interval, the switching circuit 30 switches to a conducting state, at which time the current output of the control circuit 50 is multiplied by a factor less than 1 to compensate for the effect of the sudden increase in main circuit gain, reducing the positive overshoot of the switching process output voltage, and then the control circuit 50 stabilizes the voltage value at the set value by means of negative feedback; when switching from the high voltage segment to the low voltage segment, the switching circuit 30 switches to an off state, at which time the current output of the control circuit 50 is multiplied by a factor greater than 1 to compensate for the effect of the sudden decrease in main circuit gain, reducing the negative overshoot of the switching process output voltage, and the control circuit 50 then stabilizes the voltage value at the set value by means of negative feedback.
It can be understood that, by combining the control circuit 50 and the switch circuit 30, the transformer module 20 realizes the live-line differential-free switching in different voltage segments, so that the larger current or voltage overshoot caused by the free switching process is reduced, and the stability of the power circuit 100 is improved.
In order to describe the switching process of turning on and off the switch circuit 30 in detail, as shown in fig. 7, when the switch circuit 30 needs to be turned on, the control circuit 50 sends a switching signal to the MOS transistor control terminal and the electromagnetic relay RY control terminal at the same time, the current output of the control circuit 50 is multiplied by a certain coefficient smaller than 1 to compensate for the influence of the sudden increase of the main circuit gain, and then the control circuit 50 adjusts the output voltage to the set value by means of its own negative feedback function, since there is a delay in the mechanical action of the electromagnetic relay RY itself, the contact of the electromagnetic relay RY will be attracted after the MOS transistor is turned on for several ms, so as to short the MOS transistor; when the switch circuit 30 needs to be switched off, the control circuit 50 firstly provides an isolating signal for the control end of the electromagnetic relay RY, current is transferred to the MOS tube from the contact of the electromagnetic relay RY, 10ms delay is carried out to ensure that the contact of the electromagnetic relay RY is reliably isolated, then an isolating signal is provided for the control end of the MOS tube to ensure that the electromagnetic relay RY does not cause arc discharge due to current isolation, at the moment, the current output of the control circuit 50 is correspondingly multiplied by a certain coefficient larger than 1 to compensate the influence caused by sudden reduction of the gain of the main circuit, and then the control circuit 50 quickly adjusts the output voltage to a set value by means of the negative feedback function of the control circuit 50.
It can be understood that the switching circuit 30 can complete the switching without turning off the output during the whole switching process, so that the hot switching is really realized, and the switching process becomes smooth due to the negative feedback action of the control circuit 50 itself; meanwhile, the electromagnetic relay and the semiconductor device are connected in parallel, so that the total loss of the switch circuit 30 can be reduced, and the size of the radiator can be reduced.
In some embodiments, the sampling circuit 60 is connected to the control circuit 50, and is configured to collect the electrical signal output by the rectifying and filtering circuit 40, so that the control circuit 50 adjusts the output of the inverter circuit 10 according to the electrical signal.
The sampling circuit 60 collects and conditions the electrical signal output by the rectifying and filtering circuit 40, so that the output of the rectifying and filtering circuit 40 is matched with the input of the control circuit 50.
In some embodiments, the over-current detection circuit 70 is connected to the control circuit 50 and the inverter circuit 10, respectively, and the over-current detection circuit 70 is configured to collect a current signal flowing into the transformer module 20.
When the overcurrent detecting circuit 70 detects that the current flowing into the transformer module 20 is too large, an enable signal is output to the control circuit 50, so that the control circuit 50 adjusts the output of the inverter circuit 10 according to the enable signal, and components in the switch circuit 30 are prevented from being damaged due to exceeding of a rated current, so that the switch circuit 30 can be operated safely and reliably.
In the power circuit 100, the inverter circuit 10 converts the dc voltage output by the dc power supply 200 into an ac voltage, and outputs an electrical signal after passing through the transformer module 20 and the rectifying and filtering circuit 40, and the sampling circuit 60 collects and conditions the electrical signal and inputs the conditioned electrical signal to the control circuit 50, so that the control circuit 50 adjusts the output of the inverter circuit 10 according to the electrical signal, thereby forming a loop, realizing closed-loop control, and greatly improving the stability and reliability of the power circuit 100. Since the equivalent turn ratio of the primary winding and the secondary winding of the transformer module 20 is adjustable, the transformer module can convert the alternating-current voltage into different voltages for output, and under the condition that the capacity of the inverter circuit is not changed, the adjustment range of the output voltage can be widened by adjusting the equivalent turn ratio, and a large power output can be maintained in a wide output voltage range.
As an embodiment of the utility model provides a on the other hand, the embodiment of the utility model provides a power supply unit is still provided, including foretell power supply circuit, power supply unit wide application in the occasion of wide direct current voltage range output aims at that whole wide direct current voltage within range can both provide great output, like the direct current power supply who is used for switching power supply or inverter development for communication equipment and battery charging's communication power supply, be used for energy transmission between vehicle mounted power source and the consumer and so on.
It can be understood that, in the power circuit of the power supply device, since the equivalent turn ratio of the primary winding and the secondary winding in the transformer module is adjustable, the ac voltage can be converted into different voltages for output only by performing redundancy on the secondary winding in the transformer module, so that the adjustment range of the output voltage can be widened, and a larger output power can be maintained in a wider output voltage range without increasing the capacity of the inverter circuit.
It should be noted that the present invention can be embodied in many different forms and is not limited to the embodiments described in the present specification, which are not intended as additional limitations to the present invention, but rather, are provided for the purpose of providing a more thorough and complete understanding of the present disclosure. In addition, under the idea of the present invention, the above technical features are combined with each other continuously, and many other variations of the present invention in different aspects as described above are considered as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A power supply circuit, comprising:
a transformer module comprising a primary winding and a secondary winding, the primary winding coupled with the secondary winding, the primary winding for coupling an alternating voltage to the secondary winding;
a switching circuit connected to the secondary winding;
and the control circuit is connected with the switching circuit and used for controlling the working state of the switching circuit so as to adjust the equivalent turn ratio of the primary winding and the secondary winding.
2. The power supply circuit according to claim 1, wherein the number of turns of the secondary coil coupling the alternating voltage in the secondary winding is adjustable.
3. The power supply circuit according to claim 1, wherein the transformer module comprises at least two transformers, primary windings of the at least two transformers are connected in parallel with each other, and secondary windings of the at least two transformers are connected in series with each other.
4. The power supply circuit according to claim 1, wherein the switching circuit comprises:
the switch tube comprises a switch tube input end, a switch tube output end and a switch tube control end, and the control circuit is connected to the switch tube control end;
the relay comprises a relay input end, a relay output end and a relay control end, wherein the relay input end is connected with the switch tube input end, the relay output end is connected with the switch tube output end, and the control circuit is connected to the relay control end.
5. The power supply circuit according to any one of claims 1 to 4, further comprising an inverter circuit connected to the primary winding of the transformer module.
6. The power supply circuit according to claim 5, further comprising a rectifying and filtering circuit, connected to the switching circuit and the secondary winding, respectively, for rectifying and filtering the coupled ac voltage to output a dc voltage.
7. The power circuit according to claim 6, further comprising a sampling circuit connected to the control circuit for collecting the electrical signal output by the rectifying and filtering circuit, so that the control circuit adjusts the output of the inverter circuit according to the electrical signal.
8. The power supply circuit according to claim 5, further comprising an over-current detection circuit connected to the control circuit for collecting a current signal flowing into the transformer module, so that the control circuit adjusts an output of the inverter circuit according to the current signal.
9. The power supply circuit according to claim 5, wherein the control circuit comprises:
a controller;
the switch driving circuit is respectively connected with the switch circuit and the controller and is used for driving the switch circuit to work;
and the inverter driving circuit is respectively connected with the inverter circuit and the controller and is used for driving the inverter circuit to work.
10. A power supply device characterized by comprising a power supply circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921386582.6U CN210351016U (en) | 2019-08-23 | 2019-08-23 | Power supply circuit and power supply equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921386582.6U CN210351016U (en) | 2019-08-23 | 2019-08-23 | Power supply circuit and power supply equipment |
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| CN210351016U true CN210351016U (en) | 2020-04-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968609A (en) * | 2021-02-05 | 2021-06-15 | 飞依诺科技(苏州)有限公司 | Flyback switching power supply, control method thereof and ultrasonic equipment |
| CN113381619A (en) * | 2021-07-16 | 2021-09-10 | 辽宁工程技术大学 | Direct current converter with wide gain range |
-
2019
- 2019-08-23 CN CN201921386582.6U patent/CN210351016U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968609A (en) * | 2021-02-05 | 2021-06-15 | 飞依诺科技(苏州)有限公司 | Flyback switching power supply, control method thereof and ultrasonic equipment |
| CN113381619A (en) * | 2021-07-16 | 2021-09-10 | 辽宁工程技术大学 | Direct current converter with wide gain range |
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