CN119582585B - Power supply device and medical system - Google Patents
Power supply device and medical system Download PDFInfo
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- CN119582585B CN119582585B CN202510122993.8A CN202510122993A CN119582585B CN 119582585 B CN119582585 B CN 119582585B CN 202510122993 A CN202510122993 A CN 202510122993A CN 119582585 B CN119582585 B CN 119582585B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
A power supply device and a medical system belong to the technical field of medical power supplies, the power supply device can enable switching between a constant voltage mode and a constant current mode to be more accurate according to judgment conditions of a preset voltage threshold and a preset time period in combination with an applied voltage, the power supply device can be switched to the constant voltage mode only when the applied voltage is lower than the preset voltage threshold and the preset time period is continuous, misjudgment caused by transient voltage fluctuation can be avoided, mode switching stability is ensured, further impedance change of a load in the preset time period is calculated according to the applied voltage and the applied current, when the impedance change is higher than the preset impedance change threshold, the power supply device is switched to the constant current mode, adverse effects on the load caused by severe voltage change are avoided through limiting current, and when the impedance change is lower than or equal to the preset impedance change threshold, the constant voltage mode is maintained, so that stable output of the voltage is ensured, and load requirements are met.
Description
Technical Field
The invention belongs to the technical field of medical power supplies, and particularly relates to a power supply device and a medical system.
Background
Existing power supply devices generally provide only a constant voltage or current. In some application scenarios, however, it may be desirable to provide both constant voltage and current. For example for some sensitive electronic devices or charging devices in medical systems, etc. In order to solve the problem, many developers try to develop power supply devices which can provide constant voltage and constant current, but in the switching process between constant voltage and constant current modes, the problems of unstable control, inaccurate switching and the like often exist, and the use effect and reliability of the power supply devices are affected.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a power supply device and a medical system, which aim to solve the problem that the use effect and the reliability of the power supply device are affected due to inaccurate switching caused by unstable control in the process of switching between a constant voltage mode and a constant current mode of the traditional power supply device.
A first aspect of an embodiment of the present invention provides a power supply apparatus including:
an input terminal for receiving an input voltage;
an output terminal for outputting a set target voltage or a set target current;
a receiving module for receiving an external applied voltage and an applied current;
The switching power supply module is used for generating direct-current voltage according to input voltage and outputting set target voltage through a constant-voltage mode or outputting set target current through a constant-current mode to an output terminal, the control module is used for comparing the applied voltage with a preset voltage threshold value, controlling the switching power supply module to switch to the constant-voltage mode when the applied voltage is lower than the preset voltage threshold value within a preset duration, calculating impedance change of a load according to the applied voltage and the applied current within the preset duration when the applied voltage exceeds the preset voltage threshold value, controlling the switching power supply module to switch to the constant-current mode when the impedance change is higher than the preset impedance change threshold value, and controlling the switching power supply module to keep the constant-voltage mode when the impedance change is lower than or equal to the preset impedance change threshold value.
In one embodiment, the power supply device further comprises an indication voltage generation module for generating an action indication voltage to the control module.
In one embodiment, the indication voltage generation module comprises a signal conversion module, a differential amplifier and an adjustable voltage source, wherein the signal conversion module is used for generating a current indication voltage which is in linear relation with an applied current, and the differential amplifier is used for adding the current indication voltage and the voltage output by the adjustable voltage source to generate an action indication voltage.
In one embodiment, the control module is further configured to determine a current operating state of the power supply device according to the action indication voltage.
In one embodiment, the switching power supply module comprises a switching element, a converter circuit, a current feedback circuit and a voltage feedback circuit, wherein the switching element is used for adjusting on and off time according to a pulse width adjusting signal to ensure that output current is matched with a set target current or to ensure that output voltage is matched with the set target voltage, the converter circuit is used for converting input voltage into output voltage or output current, the current feedback circuit is used for monitoring the output current in real time and generating a first pulse width adjusting signal to the switching element according to the difference between the output current and the set target current, and the voltage feedback circuit is used for monitoring the output voltage in real time and generating a second pulse width adjusting signal to the switching element according to the difference between the output voltage and the set target voltage.
In one embodiment, the current feedback circuit comprises a first current sensor, a first differential amplifier and a first pulse width modulation circuit, wherein the first current sensor is used for monitoring output current, the output current is input to the first differential amplifier, the first differential amplifier is used for comparing the output current with a set target current to generate a current error signal, and the first pulse width modulation circuit is used for generating the first pulse width modulation signal according to the current error signal.
In one embodiment, the voltage feedback circuit comprises a first voltage sensor, a second differential amplifier and a second pulse width modulation circuit, wherein the first voltage sensor is used for monitoring output voltage and inputting the output voltage to the second differential amplifier, the second differential amplifier is used for comparing the output voltage with a set target voltage to generate a voltage error signal, and the second pulse width modulation circuit is used for generating a second pulse width modulation signal according to the voltage error signal.
In one embodiment, the control module comprises a voltage comparison circuit, a programmable logic controller and a control terminal, wherein the voltage comparison circuit is used for comparing an applied voltage within a preset time period with a preset voltage threshold, generating a first control signal to the control terminal when the applied voltage within the preset time period is lower than the preset voltage threshold, inputting the applied voltage within the preset time period and an applied current to the programmable logic controller when the applied voltage exceeds the preset voltage threshold, the programmable logic controller is used for calculating the impedance change of a load according to the applied voltage and the applied current, generating a second control signal to the control terminal when the impedance change is higher than the preset impedance change threshold, generating a first control signal to the control terminal when the impedance change is lower than or equal to the preset impedance change threshold, and the control terminal is connected with the switching power module and used for controlling the switching power module to switch to a constant voltage mode according to the first control signal and controlling a constant current mode switched by the switching power module according to the second control signal.
In one embodiment, the voltage comparison circuit comprises a second voltage sensor, a second current sensor and a logic circuit, wherein the second voltage sensor is used for monitoring the applied voltage, the second current sensor is used for monitoring the applied current, the logic circuit is used for comparing the applied voltage within a preset time period with a preset voltage threshold value and outputting a first control signal according to a comparison result or outputting the applied voltage and the applied current to the programmable logic controller according to the comparison result.
A second aspect of an embodiment of the application provides a medical system comprising a power supply device as described in the first aspect above.
The embodiment of the application has the beneficial effects that the input terminal receives input voltage, the output terminal outputs set target voltage or set target current, the receiving module receives external applied voltage and applied current, the switching power supply module generates direct-current voltage according to the input voltage, the set target voltage is output through the constant-voltage mode or the set target current is output to the output terminal through the constant-current mode, the control module enables the switching between the constant-voltage mode and the constant-current mode to be more accurate through combining a preset voltage threshold value and a judgment condition of preset duration according to the applied voltage, the switching to the constant-voltage mode is only carried out when the applied voltage is lower than the preset voltage threshold value and the preset duration is prolonged, misjudgment caused by instantaneous voltage fluctuation can be avoided, the mode switching stability is ensured, further, the control module calculates the impedance change of a load in the preset duration according to the applied voltage and the applied current, and switches to the constant-current mode when the impedance change is higher than the preset impedance change threshold value, and the constant-voltage mode is kept if the impedance change is lower than or equal to the preset impedance change threshold value, and the power supply output overload or damage caused by overlarge load change can be effectively prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a power supply device according to an embodiment of the application;
Fig. 2 is a schematic circuit diagram of a power supply device according to another embodiment of the present application;
Fig. 3 is a schematic circuit diagram of an indication voltage generating module according to an embodiment of the application;
fig. 4 is a schematic circuit diagram of a switching power module according to an embodiment of the application;
FIG. 5 is a schematic circuit diagram of a current feedback circuit according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a current structure of a voltage feedback circuit according to an embodiment of the application;
fig. 7 is a schematic circuit diagram of a control module according to an embodiment of the application.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
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 application belongs, the terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of embodiments of the present application, the term "multi-frame" refers to more than two (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
The embodiment of the application provides a power supply device and a medical system, wherein the power supply device is applied to the medical system, and is shown in fig. 1, and fig. 1 is a schematic circuit diagram of the power supply device according to an embodiment of the application. As can be seen from fig. 1, the power supply apparatus 10 includes an input terminal 100 for receiving an input voltage, an output terminal 200 for outputting a set target voltage or a set target current, a receiving module 300 for receiving an external applied voltage and an applied current, a switching power supply module 400 for generating a direct current voltage according to the input voltage and outputting the set target voltage through a constant voltage mode or outputting the set target current through a constant current mode to the output terminal 200, a control module 500 for comparing the applied voltage with a preset voltage threshold, controlling the switching power supply module 400 to switch to the constant voltage mode when the applied voltage is lower than the preset voltage threshold for a preset time period, calculating an impedance change of a load according to the applied voltage and the applied current for the preset time period when the applied voltage exceeds the preset voltage threshold for the preset time period, and controlling the switching power supply module 400 to switch to the constant current mode if the impedance change of the load is higher than the preset impedance change threshold, and controlling the switching power supply module 400 to maintain the constant voltage mode if the impedance change is lower than or equal to the preset impedance change threshold.
In the present application, the externally applied voltage is a voltage signal applied to the power supply apparatus 10 by an external system such as a load control device, a monitoring device, or other adjusting means. For example, the load is a medical device, and the control system or monitoring system of the medical device generates a corresponding applied voltage by monitoring the voltage demand of the medical device. The power supply device 10 receives the applied voltage through the receiving module 300 and inputs the applied voltage to the control module 500, so that the control module 500 determines the working state of the power supply device 10 according to the applied voltage. The applied current is a current signal applied by an external system to the power supply device 10, which generally reflects the current demand of the load. The power supply device 10 receives the applied current through the receiving module 300 and inputs the applied current to the control module 500, so that the control module 500 further determines the impedance change of the load according to the applied voltage and the applied current.
And judging the applied voltage by the control module, and controlling to switch to a constant voltage mode when the applied voltage is lower than a preset voltage threshold value within a preset time period. When the applied voltage is higher than a preset voltage threshold value within a preset period, whether the power supply device is switched to a constant current mode is further judged through load impedance change, particularly when the impedance change of a load is higher than the preset impedance change threshold value, the load change is relatively large, and under the condition that the constant voltage mode cannot effectively cope with the severe change of the load, the power supply device is switched to the constant current mode. In the constant current mode, the power supply device supplies power according to the set target current, excessive voltage fluctuation caused by abrupt load change is avoided, the overcurrent problem caused by abrupt load change can be effectively avoided, and when the impedance change of the load is smaller than or equal to a preset impedance change threshold value, the electrical characteristic of the load is stable, and the constant voltage mode is selected to be kept at the moment so as to ensure stable output of the voltage and meet load requirements.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a power supply device according to another embodiment of the application. As can be seen from fig. 2, in the present application, the power supply device 10 further includes an instruction voltage generation module 600 for generating an operation instruction voltage and outputting the operation instruction voltage to the control module 500. The control module 500 is further configured to determine a current operating state of the power supply device 10 according to the action indication voltage, so as to perform corresponding adjustment or response. By feeding back the operation instruction voltage, the control module 500 can detect an abnormal operation or a failure of the power supply device 10 in time. For example, when the power supply apparatus 10 is in an abnormal state, the action indication voltage may deviate from a normal value, and the control module 500 may recognize a fault based on the action indication voltage and take measures such as switching an operation mode or issuing a warning, etc., thereby enhancing self-diagnosis and troubleshooting capabilities of the power supply apparatus 10.
As shown in fig. 3, fig. 3 is a schematic circuit diagram of an indication voltage generating module according to an embodiment of the application. As can be seen from fig. 3, the indication voltage generation module 600 includes a signal conversion module 610, a differential amplifier 620, and an adjustable voltage source 630. The signal conversion module 610 is configured to generate a current indication voltage that is linearly related to an applied current, where the current indication voltage is capable of reflecting a change in a load current. The differential amplifier 620 is configured to add the current indication voltage to the voltage output from the adjustable voltage source 630 to generate an operation indication voltage. Wherein the voltage output by the adjustable voltage source 630 is dynamically adjustable. In the present application, the control module 500 adjusts the voltage output from the adjustable voltage source 630 according to the received applied voltage to reflect the change in the applied voltage. Optionally, the voltage output by the adjustable voltage source 630 is linearly related to the applied voltage, and the differential amplifier 620 adds the current indication voltage to the voltage output by the adjustable voltage source 630 to generate the action indication voltage. The action indication voltage can reflect the combined change in applied current and applied voltage, thereby providing critical operating state feedback information to the control module 500. The control module 500 can determine whether the current operating state of the power supply device meets the load requirement by monitoring the action indication voltage.
In the present application, the current instruction voltage linearly related to the applied current is generated, and the current instruction voltage is added to the voltage linearly related to the applied voltage outputted from the adjustable voltage source 630, thereby generating the operation instruction voltage capable of reflecting the integrated change of the applied current and the applied voltage. The control module 500 determines the current operation mode of the power supply device 10 according to the operation instruction voltage, and determines whether the operation mode needs to be switched. For example, the control module 500 determines the current operation mode of the power supply device 10 by determining whether the operation instruction voltage obtained by superimposing the current instruction voltage and the voltage of the adjustable voltage source 630 satisfies a preset condition, and determines whether the operation mode (for example, switching between the constant voltage mode and the constant current mode) needs to be switched. Because the output voltage of the adjustable voltage source 630 is dynamically adjustable, the power supply device 10 can adjust the output voltage thereof so that the action indication voltage timely reflects the change characteristics of the load, so that the power supply device 10 can quickly and accurately adapt to the requirements of different loads, dynamically adjust the working mode, ensure that the power supply device 10 always operates in the most suitable working mode, and further improve the stability and reliability of the power supply device 10.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of a switching power module according to an embodiment of the application. As can be seen from fig. 4, in the present application, the switching power module 400 includes a switching element 410, a converter circuit 420, a current feedback circuit 430 and a voltage feedback circuit 440, wherein the switching element 410 is used for adjusting on and off time according to a pulse width adjustment signal to ensure that an output current matches a set target current or that an output voltage matches a set target voltage, the converter circuit 420 is used for converting an input voltage into an output voltage or an output current, the current feedback circuit 430 is used for monitoring the output current in real time and generating a first pulse width adjustment signal to the switching element 410 according to a difference between the output current and the set target current, and the voltage feedback circuit 440 is used for monitoring the output voltage in real time and generating a second pulse width adjustment signal to the switching element 410 according to a difference between the output voltage and the set target voltage.
In the present application, by the cooperative operation of the switching element 410, the inverter circuit 420, the current feedback circuit 430, and the voltage feedback circuit 440, it is possible to perform accurate adjustment according to a target voltage or a target current. The on and off time of the switching element 410 is adjusted by the first pulse width adjustment signal or the second pulse width adjustment signal, respectively, so that the stability of output can be ensured, and different load requirements can be satisfied.
The current feedback circuit 430 can monitor the output current in real time, and generate a first pulse width modulation signal according to the difference between the output current and the set target current, so as to adjust the on and off time of the switching element 410, thereby ensuring that the power supply device can maintain the set target current, avoiding the output current from being too large or too small, and effectively reducing the fluctuation caused by the current deviation.
The voltage feedback circuit 440 can monitor the output voltage in real time, and generate a second pulse width modulation signal according to the difference between the output voltage and the set target voltage, so as to adjust the switching period of the switching element 410, and ensure that the output voltage is kept at the set target voltage, so as to adapt to the requirement of load change, and avoid load damage caused by unstable voltage.
As shown in fig. 5, fig. 5 is a schematic circuit diagram of a current feedback circuit according to an embodiment of the application. As can be seen from fig. 5, the current feedback circuit 430 includes a first current sensor 431, a first differential amplifier 432, and a first pulse width modulation circuit 433, wherein the first current sensor 431 is configured to monitor an output current, input the output current to the first differential amplifier 432, the first differential amplifier 432 is configured to compare the output current with a set target current to generate a current error signal, and the first pulse width modulation circuit 433 is configured to generate a first pulse width modulation signal according to the current error signal.
In one embodiment, as shown in fig. 6, fig. 6 is a schematic diagram of a current structure of a voltage feedback circuit according to an embodiment of the application. As can be seen from fig. 6, the voltage feedback circuit 440 includes a first voltage sensor 441, a second differential amplifier 442, and a second pulse width modulation circuit 443, wherein the first voltage sensor 441 is configured to monitor an output voltage and input the output voltage to the second differential amplifier 442, the second differential amplifier 442 is configured to compare the output voltage with a set target voltage to generate a voltage error signal, and the second pulse width modulation circuit 443 is configured to generate a second pulse width modulation signal according to the voltage error signal.
The current feedback circuit 430 monitors the output current in real time and compares the output current with the target current, and generates a first pulse width modulation signal when the output current has an error with the target current. The first pulse width modulation signal increases or decreases the current output by adjusting the on time of the switching element 410. Specifically, the first pulse width modulation signal increases the current output by increasing the on-time of the switching element 410 until the set target current is reached. The first pulse width modulation signal reduces the current output by shortening the on-time of the switching element 410 to keep the current near the target current.
The voltage feedback circuit 440 monitors the output voltage in real time and compares it to a target voltage. And generating a second pulse width modulation signal when the output voltage has an error with the target voltage. The second pulse width modulation signal adjusts the output voltage by adjusting the on time of the switching element 410. Specifically, the second pulse width modulation signal increases the output voltage by increasing the on time of the switching element 410 until the set target voltage is reached. The second pulse width modulation signal reduces the output voltage by shortening the on-time of the switching element 410 to maintain the voltage around the target value.
Specifically, the first pulse width modulation signal and the second pulse width modulation signal respectively implement the adjustment of the on-time of the switching element 410 by different duty ratios. The duty cycle of the first pulse width modulation signal is related to the current error of the output current and the target current, and the duty cycle of the second pulse width modulation signal is related to the voltage error of the output voltage and the target voltage. Illustratively, when the output current is lower than the target current, the duty cycle of the first pulse width modulation signal increases, i.e., the high level duration of the first pulse width modulation signal increases, thereby increasing the current output, and when the output current is higher than the target current, the duty cycle of the first pulse width modulation signal decreases, thereby decreasing the current output. The high level duration of the second pulse width signal increases when the output voltage is lower than the target voltage, thereby increasing the voltage output, and decreases when the output voltage is higher than the target voltage, thereby decreasing the voltage output.
In one embodiment, as shown in fig. 7, fig. 7 is a schematic circuit diagram of a control module according to an embodiment of the present application. As can be seen from fig. 7, the control module 500 includes a voltage comparing circuit 510, a programmable logic controller 520 and a control terminal 530, the voltage comparing circuit 510 is configured to compare an applied voltage with a preset voltage threshold value for a preset time period, generate a first control signal to the control terminal 530 when the applied voltage is lower than the preset voltage threshold value for the preset time period, input an applied voltage and an applied current for the preset time period to the programmable logic controller 520 when the applied voltage exceeds the preset voltage threshold value, the programmable logic controller 520 is configured to calculate an impedance change of the load according to the applied voltage and the applied current, generate a first control signal to the control terminal 530 when the impedance change of the load is lower than or equal to the preset impedance change threshold value, generate a second control signal to the control terminal 530 when the impedance change of the load is higher than the preset impedance change threshold value, and the control terminal 530 is connected to the switching power module 400, and is configured to control the switching power module 400 to switch to a constant voltage mode according to the first control signal and to the constant current mode switched by the switching power module 400 according to the second control signal.
By comparing the applied voltage with a preset voltage threshold and setting a preset time period, misoperation or unnecessary power supply mode switching caused by short-time voltage fluctuation can be effectively avoided. Further, whether the load is in a normal working state is judged by introducing impedance change of the load. If the impedance of the load varies greatly, meaning that the electrical characteristics of the load vary significantly, current and voltage instability may result. In this case, the constant voltage mode may not be effective to cope with a drastic change of the load because the voltage remains unchanged, but the current may go out of the safe range, resulting in damage to the load or overload of the power supply. Therefore, by maintaining the constant voltage mode to ensure stable output of the voltage and meet the load demand in the case where the load impedance variation is small, and by switching to the constant current mode to limit the current when the load impedance variation is large, the adverse effect of the drastic variation of the voltage on the load is avoided.
Illustratively, in the present application, the voltage comparison circuit 510 includes a second voltage sensor for monitoring the applied voltage, a second current sensor for monitoring the applied current, and a logic circuit for comparing the applied voltage for a preset period of time with a preset voltage threshold and outputting a first control signal according to the comparison result or outputting the applied voltage and the applied current to the programmable logic controller according to the comparison result.
According to the analysis, the power supply device provided by the application receives input voltage through the input terminal, the output terminal outputs set target voltage or set target current, the receiving module receives external applied voltage and applied current, the switching power supply module generates direct-current voltage according to the input voltage, outputs the set target voltage through the constant-voltage mode or outputs the set target current to the output terminal through the constant-current mode, the control module enables switching between the constant-voltage mode and the constant-current mode to be more accurate through judging conditions of combining a preset voltage threshold value and a preset duration according to the applied voltage, the switching to the constant-voltage mode is enabled only when the applied voltage is lower than the preset voltage threshold value and lasts for the preset duration, misjudgment caused by transient voltage fluctuation can be avoided, mode switching stability is ensured, further, the control module calculates impedance change of a load in the preset duration according to the applied voltage and the applied current, switches to the constant-current mode when the impedance change is higher than the preset impedance change threshold value, and keeps the constant-voltage mode if the impedance change is lower than or equal to the preset impedance change threshold value. Not only can effectively prevent the overload or damage of the power supply output caused by overlarge load change, but also can ensure the stable output of the voltage and meet the load requirement.
In addition, the embodiment of the application also provides a medical system, which comprises the power supply device shown in the embodiment.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The foregoing embodiments are merely for illustrating the technical solution of the present application, but not for limiting the same, and although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solution described in the foregoing embodiments may be modified or substituted for some of the technical features thereof, and that these modifications or substitutions should not depart from the spirit and scope of the technical solution of the embodiments of the present application and should be included in the protection scope of the present application.
Claims (10)
1. A power supply device, characterized in that the power supply device comprises:
an input terminal for receiving an input voltage;
an output terminal for outputting a set target voltage or a set target current;
a receiving module for receiving an external applied voltage and an applied current;
The switching power supply module is used for generating direct-current voltage according to the input voltage and outputting the target voltage through a constant-voltage mode or outputting the target current to the output terminal through a constant-current mode;
The control module is used for comparing the applied voltage with a preset voltage threshold, controlling the switching power supply module to switch to a constant voltage mode when the applied voltage is lower than the preset voltage threshold within a preset time period, calculating the impedance change of a load according to the applied voltage and the applied current within the preset time period if the applied voltage exceeds the preset voltage threshold, controlling the switching power supply module to switch to a constant current mode if the impedance change is higher than the preset impedance change threshold, and controlling the switching power supply module to keep the constant voltage mode if the impedance change is lower than or equal to the preset impedance change threshold.
2. The power supply apparatus of claim 1, further comprising an indication voltage generation module for generating an action indication voltage to the control module.
3. The power supply device according to claim 2, wherein the indication voltage generation module comprises a signal conversion module, a differential amplifier and an adjustable voltage source, wherein the signal conversion module is used for generating a current indication voltage which is in linear relation with the applied current, and the differential amplifier is used for adding the current indication voltage and the voltage output by the adjustable voltage source to generate the action indication voltage.
4. The power supply device according to claim 2, wherein the control module is further configured to determine a current operating state of the power supply device according to the action indication voltage.
5. The power supply apparatus of claim 1, wherein the switching power supply module comprises a switching element, a converter circuit, a current feedback circuit, and a voltage feedback circuit;
The switching element is used for adjusting the on and off time according to the first pulse width adjusting signal to ensure that the output current is matched with the set target current, or used for adjusting the on and off time according to the second pulse width adjusting signal to ensure that the output voltage is matched with the set target voltage;
the converter circuit is used for converting the input voltage into output voltage or output current;
The current feedback circuit is used for monitoring output current in real time and generating a first pulse width modulation signal to the switching element according to the difference between the output current and the target current;
the voltage feedback circuit is used for monitoring output voltage in real time and generating a second pulse width modulation signal to the switching element according to the difference between the output voltage and the target voltage.
6. The power supply device according to claim 5, wherein the current feedback circuit comprises a first current sensor for monitoring an output current, the first current sensor being configured to input the output current to the first differential amplifier, a first differential amplifier being configured to compare the output current with the target current to generate a current error signal, and a first pulse width modulation circuit being configured to generate the first pulse width modulation signal based on the current error signal.
7. The power supply device according to claim 5, wherein the voltage feedback circuit comprises a first voltage sensor for monitoring an output voltage, a second differential amplifier for comparing the output voltage with the target voltage to generate a voltage error signal, and a second pulse width modulation circuit for generating the second pulse width modulation signal based on the voltage error signal.
8. The power supply device of claim 1, wherein the control module comprises a voltage comparison circuit, a programmable logic controller, and a control terminal;
The voltage comparison circuit is used for comparing the applied voltage with a preset voltage threshold value within a preset time period, and generating a first control signal to the control terminal when the applied voltage is lower than the preset voltage threshold value within the preset time period;
when the applied voltage exceeds the preset voltage threshold, inputting the applied voltage and the applied current in a preset time period to the programmable logic controller;
The programmable logic controller is used for calculating the impedance change of a load according to the applied voltage and the applied current, and generating a second control signal to the control terminal when the impedance change is higher than a preset impedance change threshold value;
the control terminal is connected with the switching power supply module and is used for controlling the switching power supply module to switch to a constant voltage mode according to the first control signal and controlling the switching power supply module to switch to a constant current mode according to the second control signal.
9. The power supply apparatus according to claim 8, wherein the voltage comparing circuit includes a second voltage sensor for monitoring the applied voltage, a second current sensor for monitoring the applied current, and a logic circuit for comparing the applied voltage for a preset period of time with a preset voltage threshold and outputting a first control signal according to the comparison result or outputting the applied voltage and the applied current to the programmable logic controller according to the comparison result.
10. A medical system comprising a power supply device according to any one of claims 1 to 8.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202191603U (en) * | 2011-01-14 | 2012-04-18 | 鼎迈医疗科技(苏州)有限公司 | Implanted double-mode stimulation chip and double-mode nerve stimulation system |
| CN111740602A (en) * | 2019-03-25 | 2020-10-02 | Tdk株式会社 | Power supply device and medical system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008053532A1 (en) * | 2006-10-31 | 2008-05-08 | Olympus Medical Systems Corp. | High frequency cautery electric power source device |
| US7911814B2 (en) * | 2008-05-30 | 2011-03-22 | Active-Semi, Inc. | Constant current and voltage controller in a three-pin package with dual-use power pin |
| US9270202B2 (en) * | 2013-03-11 | 2016-02-23 | Covidien Lp | Constant power inverter with crest factor control |
| US10610285B2 (en) * | 2013-07-19 | 2020-04-07 | Covidien Lp | Electrosurgical generators |
| CN105141137B (en) * | 2015-09-17 | 2017-10-31 | 无锡硅动力微电子股份有限公司 | Control circuit for switching power converters |
| US12057765B2 (en) * | 2022-03-29 | 2024-08-06 | Renesas Electronics America Inc. | Dual-mode high-side power field-effect transistor driver for power regulators |
| CN117318445A (en) * | 2023-09-26 | 2023-12-29 | 赛迪半导体(深圳)有限公司 | Power conversion circuit, control method thereof and chip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202191603U (en) * | 2011-01-14 | 2012-04-18 | 鼎迈医疗科技(苏州)有限公司 | Implanted double-mode stimulation chip and double-mode nerve stimulation system |
| CN111740602A (en) * | 2019-03-25 | 2020-10-02 | Tdk株式会社 | Power supply device and medical system |
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