CN115912884A - Soft start control circuit and method - Google Patents
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Abstract
The embodiment of the application discloses a soft start control circuit and a method, wherein the method comprises the following steps: collecting a first capacitor voltage and a battery voltage to respectively obtain a first voltage and a second voltage, wherein the first capacitor voltage is obtained by charging a soft start module; closing the controllable switch according to the first voltage and the second voltage; collecting the first capacitor voltage to obtain a third voltage, wherein the third voltage is obtained by supplying power to the battery after the controllable switch is closed; analyzing whether the soft start control circuit is in an abnormal state or not according to the third voltage; and if the soft start control circuit is in an abnormal state, the controllable switch is disconnected. By adopting the embodiment of the application, the power supply of the storage battery can be stopped in time when the soft start is abnormal, the electric quantity of the storage battery is prevented from being excessively consumed, and the service life of the storage battery is further prolonged.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a soft start control circuit and method.
Background
The energy storage converter is an electronic power device capable of realizing energy bidirectional transmission, and can control charging and discharging of a storage battery and change of alternating current and direct current. However, in the operation process of the energy storage converter, an impact current may be generated, and under the condition that the impact current is too large, the direct current side main power relay controllable switch or the alternating current side power relay controllable switch of the energy storage converter may be damaged by overcurrent.
Therefore, a soft-start control circuit is usually provided in the energy storage converter to buffer the current surge generated by the energy storage converter. However, in actual operation, the existing soft start control circuit may have abnormal conditions, which may cause a failure of soft start, and in this process, the electric quantity of the storage battery is consumed all the time, which seriously affects the service life of the storage battery.
Disclosure of Invention
The application provides a soft start control circuit and method, can in time stop the battery power supply when the soft start takes place unusually, prevent to excessively consume the electric quantity of battery, and then prolong the life of battery.
In a first aspect of the present application, a soft-start control circuit is provided, which includes a soft-start module, a battery, a controllable switch, a first capacitor, an auxiliary power supply, and a controller, wherein:
one end of the soft start module is connected with one end of the first capacitor, the first end of the auxiliary power supply, the first end of the controller and the first end of the controllable switch respectively, and the other end of the soft start module is connected with the positive electrode of the battery and the second end of the controllable switch respectively;
the negative electrode of the battery is respectively connected with the other end of the first capacitor and the second end of the auxiliary power supply;
the third end of the auxiliary power supply is connected with the second end of the controller;
and the third end of the controller is connected with the third end of the controllable switch.
Through the technical scheme, the controller judges whether the soft start switch is started or not according to the voltage between the first capacitor and the battery, and then the controllable switch is controlled to be closed; the controller judges whether the soft start is abnormal or not according to the voltage of the first capacitor, and if the soft start is abnormal, the controller can further control the controllable switch to be switched off, and the battery is stopped to supply power in time, so that the electric quantity of the battery is prevented from being excessively consumed, and the service life of the battery is further prolonged.
Optionally, the soft start module includes a first switch, a first resistor, a second resistor, a third resistor, a second capacitor, a third capacitor, a first triode, and a first diode, wherein:
one end of the first resistor is connected with the cathode of the first diode, and the other end of the first resistor is respectively connected with the first end of the auxiliary power supply, the first end of the controller and one end of the first capacitor;
an emitter of the first triode is respectively connected with an anode of the first diode, one end of the second capacitor and one end of the third capacitor; a collector of the first triode is respectively connected with the anode of the battery and one end of the third resistor, and a base of the first triode is respectively connected with the other end of the third capacitor and one end of the first switch;
the other end of the first switch is connected with one end of the second resistor;
the other end of the second resistor is connected with the other end of the second capacitor and the other end of the third resistor respectively.
By adopting the technical scheme, the anode of the battery is connected with the second capacitor and supplies power to the second capacitor, and after the first switch is closed, the second capacitor supplies stored electric energy to the third capacitor, so that the emitter of the first triode is conducted with the collector, and the battery directly supplies power to the first capacitor.
Optionally, the soft start module further includes a fourth resistor and a fourth capacitor, where:
one end of the fourth resistor is connected with a connection point of the first switch and the third capacitor, one end of the fourth capacitor and a collector of the first triode, and the other end of the fourth resistor is respectively connected with a connection point of the second capacitor and the third capacitor, the other end of the fourth capacitor, a connection point of an emitter of the first triode and an anode of the first diode.
Through adopting above-mentioned technical scheme, fourth electric capacity and fourth resistance constitute filter circuit, can strain the burr that produces when first switch is closed.
Optionally, the soft start module further includes a first zener diode, wherein:
the anode of the first voltage stabilizing diode is connected with the connection point of the third resistor and the second capacitor, and the cathode of the first voltage stabilizing diode is connected with the connection point of the second capacitor and the fourth capacitor.
By adopting the technical scheme, the first voltage stabilizing diode is connected in series with the third resistor to form overvoltage protection.
Optionally, the controllable switch is one of a relay, a BJT, an SCR, a GTO, a P-MOSFET, an IGBT, an MCT, a SIT, and a BJT.
By adopting the technical scheme, the controllable switch is set to be a switch which can be controlled by the controller, and when the soft start is abnormal, the controller can timely control the disconnection of the switch, so that the electric quantity of the battery is prevented from being excessively consumed.
In a second aspect of the present application, a soft start control method is provided, which is applied to a controller in a soft start control circuit, and includes:
collecting a first capacitor voltage and a battery voltage to respectively obtain a first voltage and a second voltage, wherein the first capacitor voltage is obtained by charging a soft start module;
closing the controllable switch according to the first voltage and the second voltage;
collecting the first capacitor voltage to obtain a third voltage, wherein the third voltage is obtained by supplying power to the battery after the controllable switch is closed;
analyzing whether the soft start control circuit is in an abnormal state or not according to the third voltage;
and if the soft start control circuit is in an abnormal state, the controllable switch is disconnected.
According to the technical scheme, the controller judges whether the soft start switch is started or not according to the voltage between the first capacitor and the battery, and then controls the controllable switch to be closed; the controller judges whether the soft start is abnormal or not according to the voltage of the first capacitor, and if the soft start is abnormal, the controller can further control the controllable switch to be switched off, and the battery is stopped to supply power in time, so that the electric quantity of the battery is prevented from being excessively consumed, and the service life of the battery is further prolonged.
Optionally, the closing the controllable switch according to the first voltage and the second voltage includes:
subtracting the first voltage from the second voltage to obtain a voltage difference value;
judging whether the voltage difference value is smaller than a starting threshold value or not;
and if the voltage difference value is smaller than the opening threshold value, closing the controllable switch.
By adopting the technical scheme, the controllable switch is controlled to be closed according to the voltage difference value, and the first triode can be automatically cut off within a certain time, so that the battery charges the first capacitor through the circuit where the controllable switch is located.
Optionally, the analyzing, according to the third voltage, whether the soft-start control circuit is in an abnormal state includes:
judging whether the third voltage is reduced to a closing threshold value of the auxiliary power supply;
if the first voltage drops to the closing threshold value of the auxiliary power supply, judging that the soft start control circuit is in an abnormal state;
and if the first voltage does not drop to the closing threshold of the auxiliary power supply, judging that the soft start control circuit is in a normal state.
Through the technical scheme, whether the soft start is abnormal or not is judged according to the voltage of the first capacitor, and the controllable switch is timely disconnected when the soft start is abnormal, so that the excessive consumption of the battery can be effectively prevented.
Optionally, if the soft start control circuit is in an abnormal state, after the controllable switch is turned off, the method further includes:
and when the auxiliary power supply consumes the first capacitance electric quantity, stopping the operation of the auxiliary power supply, wherein the first capacitance electric quantity is obtained by supplying power to the battery before the controllable switch is switched off.
Through the technical scheme, the auxiliary power supply stops working after the auxiliary power supply consumes the electric quantity of the first capacitor, and the first capacitor is prevented from generating a capacitance effect.
Optionally, if the soft start control circuit is in an abnormal state, after the controllable switch is turned off, the method further includes:
and generating an abnormity prompt and sending the abnormity prompt to professional maintenance personnel.
Through the technical scheme, the abnormity prompt is sent to professional maintenance personnel, and the soft start control circuit can be maintained in time.
In summary, the present application includes at least one of the following benefits:
1. through the technical scheme, the controller judges whether the soft start switch is started or not according to the voltage between the first capacitor and the battery, and then the controllable switch is controlled to be closed; the controller judges whether the soft start is abnormal or not according to the voltage of the first capacitor, and then controls the controllable switch to be switched off, and the battery is stopped to supply power in time, so that the electric quantity of the battery is prevented from being excessively consumed, and the service life of the battery is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a soft-start control circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a soft start module according to an embodiment of the present application;
FIG. 3 is a schematic diagram of another soft start module provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of another soft start module provided in an embodiment of the present application;
fig. 5 is a schematic flowchart of a soft start control method according to an embodiment of the present application;
fig. 6 is a schematic diagram of a soft-start control circuit provided in an embodiment of the present application.
Description of reference numerals: 1. a soft start control circuit; 10. a controller; 20. an auxiliary power supply; 30. a battery; 40. and a soft start module.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
In the description of the embodiments of the present application, the words "exemplary," "such as," or "for example" are used to indicate examples, illustrations, or illustrations. Any embodiment or design described herein as "exemplary," "e.g.," or "e.g.," is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary," "such as," or "for example" are intended to present relevant concepts in a concrete fashion.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time. In addition, the term "plurality" means two or more unless otherwise specified. For example, the plurality of systems refers to two or more systems, and the plurality of screen terminals refers to two or more screen terminals. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the indicated technical feature. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The present application will be described in detail with reference to specific examples.
The embodiment of the application discloses a soft start control circuit, as shown in fig. 1, a soft start control circuit 1 includes a soft start module 40, a battery 30, a controllable switch K2, a first capacitor C1, an auxiliary power supply 20 and a controller 10, wherein:
one end of the soft start module 40 is connected to one end of the first capacitor C1, the first end of the auxiliary power supply 20, the first end of the controller 10, and the first end of the controllable switch K2, respectively, and the other end of the soft start module 40 is connected to the positive electrode of the battery 30 and the second end of the controllable switch K2, respectively;
the negative electrode of the battery 30 is connected to the other end of the first capacitor C1 and the second end of the auxiliary power supply 20;
the third terminal of the auxiliary power supply 20 is connected with the second terminal of the controller 10;
a third terminal of the controller 10 is connected to a third terminal of the controllable switch K2.
Illustratively, when the soft start is turned on, the soft start module 40 charges the first capacitor C1, and the controller 10 simultaneously detects the voltages of the first capacitor C1 and the auxiliary power supply 20. When the voltage difference between the first capacitor C1 and the auxiliary power supply 20 reaches the threshold, the controller 10 controls the controllable switch K2 to be turned on, and at this time, the branch where the soft start module 40 is located is turned off, and the battery 30 can directly supply power to the first capacitor C1 through the branch where the controllable switch K2 is located. The controller 10 monitors the voltage of the first capacitor C1 in real time, and when it is monitored that the voltage of the first capacitor C1 decreases to the shutdown threshold of the auxiliary power supply 20, it is determined that the soft start is abnormal, and the controller 10 controls the controllable switch K2 to be turned off. When the soft start process is abnormal, the battery 30 is stopped to supply power to the first capacitor C1 in time, so as to prevent the electric quantity of the battery 30 from being excessively consumed, and further prolong the service life of the battery 30.
In another embodiment, as shown in fig. 2, the soft-start module 40 includes a first switch K1, a first resistor R1, a second resistor R2, a third resistor R3, a second capacitor C2, a third capacitor C3, a first transistor Q1, and a first diode D1, wherein:
one end of the first resistor R1 is connected to the cathode of the first diode D1, and the other end of the first resistor R1 is connected to the first end of the auxiliary power supply 20, the first end of the controller 10, and one end of the first capacitor C1, respectively;
an emitting electrode of the first triode Q1 is respectively connected with an anode of the first diode D1, one end of the second capacitor C2 and one end of the third capacitor C3; a collector of the first triode Q1 is respectively connected with the positive electrode of the battery 30 and one end of the third resistor R3, and a base of the first triode Q1 is respectively connected with the other end of the third capacitor C3 and one end of the first switch K1;
the other end of the first switch K1 is connected with one end of a second resistor R2;
the other end of the second resistor R2 is connected to the other end of the second capacitor C2 and the other end of the third resistor R3, respectively.
Illustratively, as shown in fig. 2, the battery 30 supplies power to the second capacitor C2, and the second capacitor C2 stores electric energy; in the embodiment of the present application, the first switch K1 may be understood as a soft start switch, when the first switch K1 is closed, the second capacitor C2 stores energy for the third capacitor C3, and one end of the third capacitor C3 is connected to the base of the first triode Q1; when the third capacitor C3 reaches a certain voltage, that is, the on-state voltage of the first triode Q1 is reached, the collector and emitter of the first triode Q1 are in an on-state, and at this time, the battery 30 directly supplies power to the first capacitor through the branch where the collector, emitter, first diode D1 and first resistor R1 are located, wherein the first resistor R1 serves as a load, and the first diode D1 plays a role in stabilizing voltage; when the voltage difference between the first capacitor C1 and the auxiliary power supply 20 reaches the threshold value, the controller 10 controls the controllable switch K2 to be closed, and the soft start starts to operate.
In another embodiment, as shown in fig. 3, the soft-start module 40 further includes a fourth resistor R4 and a fourth capacitor C4, where:
one end of a fourth resistor R4 is connected with a connection point of the first switch K1 and the third capacitor C3, one end of the fourth capacitor C4 and a collector of the first triode Q1, and the other end of the fourth resistor R4 is connected with a connection point of the second capacitor C2 and the third capacitor C3, the other end of the fourth capacitor C4 and a connection point of an emitter of the first triode Q1 and an anode of the first diode D1 respectively.
Illustratively, a key may be used as the first switch K1, and when the key is pressed, the first switch K1 may be closed, and when the key is pressed, the first switch K1 may be considered to be opened. However, since the switches used in the conventional push button switch are all mechanical elastic switches, when the mechanical contacts are opened and closed, one push button switch is not immediately and stably turned on when the mechanical contacts are closed, and is not immediately and completely turned off when the mechanical contacts are opened, but a series of shakes are generated at the moment of closing and opening.
In the embodiment of the application, the fourth capacitor C4 and the fourth resistor R4 are connected in parallel to form a filter unit by utilizing the charge-discharge characteristic of the capacitor, the filter unit is connected with the first switch K1 in parallel, the filter unit can be connected with two ends of the mechanical contact in parallel by the characteristic that the voltage at two ends of the fourth capacitor C4 can not change suddenly, burrs generated by shaking of the key can be eliminated, and therefore hardware shaking can be eliminated.
In another embodiment, as shown in fig. 4, the soft start module 40 further includes a first zener diode Z1, wherein:
the anode of the first zener diode Z1 is connected to the connection point of the third resistor R3 and the second capacitor C2, and the cathode of the first zener diode Z1 is connected to the connection point of the second capacitor C2 and the fourth capacitor C4.
Illustratively, the voltage of the second capacitor C2 can be effectively kept stable by the first zener diode Z1.
On the basis of the above embodiment, as an alternative embodiment, the controllable switch K2 may be one of a relay, a BJT, an SCR, a GTO, a P-MOSFET, an IGBT, an MCT, a SIT, and a BJT.
The relay is an electric control device, and when the change of the input quantity reaches a certain degree, the controlled quantity is changed into an electric appliance with preset step change in an output circuit; the BJT is a current type full-control device, when current flows through a base electrode of the BJT, the BJT is conducted, and the base electrode is disconnected when no current flows through the base electrode, and under the conduction state, the voltage drop is small and the loss is small; the SCR is a current type semi-controlled device, the conduction of the SCR can be controlled by using positive pulse gate current, the switching frequency of the SCR is low, and the SCR has low voltage drop and low loss in a conduction state; GTO is a current type full-control device, can be switched on by using positive pulse gate current and switched off by using negative pulse gate current, has small GTO switching frequency, and has small voltage drop and low loss under the switching-on condition; the P-MOSFET is a voltage type full-control device, and can be controlled to be switched on by using positive continuous grid voltage and switched off by using negative continuous grid voltage; the P-MOSFET has high switching frequency, high input impedance, low driving power and high working frequency; the IGBT is a voltage type full-control device, can be controlled to be switched on by using positive continuous grid voltage, and can be controlled to be switched off by using negative continuous grid voltage, and has high input impedance, small driving power and high working frequency; the MCT is a voltage type full-control device, can be controlled to be switched on by positive pulse voltage, and can be controlled to be switched off by negative pulse voltage, and has high input impedance, low driving power and high working frequency; the SIT is a voltage type full-control device, can be continuously switched on or switched off by voltage control, and has high input impedance, small driving power and high working frequency.
In another embodiment, as shown in fig. 5, a flow diagram of a soft start control method is specifically provided, and the method is mainly applied to a controller 10 in a soft start control circuit, and may also be implemented by relying on a computer program or a single chip microcomputer. The computer program may be integrated into the application or may run as a separate tool-like application.
Specifically, the soft start control method includes:
step 101: the voltage of the first capacitor C1 and the voltage of the battery 30 are collected to obtain a first voltage and a second voltage respectively, and the voltage of the first capacitor C1 is obtained by charging the soft start module 40.
Referring to fig. 6, which shows a soft-start control circuit diagram of an embodiment of the present application, the first switch K1 may be understood as a soft-start switch in the embodiment of the present application, and the battery 30 charges the second capacitor C2 before the first switch K1 is closed. When the first switch K1 is closed, the soft start is turned on, the second capacitor C2 supplies the stored electric energy to the third capacitor C3, and when the third capacitor C3 is charged to reach the on-state voltage of the first triode Q1, the collector and the emitter of the first triode Q1 are in an on-state, and the battery 30 supplies power to the first capacitor C1 through the soft start module 40.
Step 102: the controllable switch K2 is closed according to the first voltage and the second voltage.
Illustratively, the battery 30 continuously charges the first capacitor C1 through the soft start module 40, the controller 10 collects the voltage of the first capacitor C1 to obtain a first voltage, and may determine whether the soft start state is normal through the first voltage, and if the soft start state is normal, the controllable switch K2 is closed.
Specifically, whether the soft start state is normal is judged according to the voltage of the first capacitor C1, and the voltage of the battery 30 can be used as a reference, in a feasible implementation manner, the voltage of the battery 30 and the voltage of the first capacitor C1 are collected by the controller 10 to obtain a first voltage and a second voltage respectively, the first voltage and the second voltage are subjected to difference to obtain a voltage difference value, the smaller the voltage difference value is, the closer the voltage of the first capacitor C1 and the voltage of the battery 30 is, and the closing of the controllable switch K2 can be further controlled by judging whether the voltage difference value is smaller than a starting threshold value.
When the voltage difference is smaller than the turn-on threshold, the controller 10 controls the controllable switch K2 to be turned on, at this time, the circuit where the first triode Q1 is located is short-circuited, and the battery 30 charges the first capacitor C1 through the circuit where the controllable switch is located.
Step 103: and collecting the voltage of the first capacitor to obtain a third voltage, wherein the third voltage is obtained by supplying power to the battery after the controllable switch is closed.
For example, after the controllable switch K2 is closed, the battery 30 directly supplies power to the first capacitor C1 through a loop where the controllable switch K2 is located, and the controller 10 collects the voltage of the first capacitor C1 at this time.
Step 104: and analyzing whether the soft start control circuit 1 is in an abnormal state or not according to the third voltage, and if the soft start control circuit 1 is in the abnormal state, disconnecting the controllable switch K2.
Illustratively, when the soft-start control circuit 1 is in operation, it is necessary to determine whether the soft-start control circuit 1 is in an abnormal state, and if the soft-start control circuit 1 is in the abnormal state, the controllable switch K2 needs to be turned off in time, so as to stop the battery 30 to continue supplying power to the first capacitor C1, thereby preventing the electric quantity of the battery 30 from being excessively consumed, and further prolonging the service life of the battery 30.
Specifically, the voltage of the first capacitor C1 after the controllable switch K2 is closed is collected by the controller 10 to obtain a third voltage, and since the first capacitor C1 supplies power to the auxiliary power supply, if the voltage of the first capacitor C1 is not enough to maintain the operation of the auxiliary power supply 20, it is determined that the soft start control circuit 1 is in an abnormal state. Further, the state of the soft-start control circuit 1 can be determined by determining whether the third voltage drops to the turn-off threshold of the auxiliary power supply 20.
When the soft start control circuit 1 is abnormal, the voltage of the first capacitor C1 can be detected and judged, and if the third voltage drops to the shutdown threshold of the auxiliary power supply 20, the soft start control circuit 1 is judged to be in an abnormal condition; if the third voltage does not drop, or the third voltage does not drop to the shutdown threshold of the auxiliary power supply 20, it is determined that the soft-start control circuit 1 is in the normal state.
When the soft start control circuit 1 is in an abnormal state, the controllable switch K2 is controlled to be turned off, and the battery 30 is stopped to supply power to the first capacitor C1. Due to the loss of electric energy of the first triode K1, when the electric energy is not lost enough to maintain the conduction, the collector and the emitter of the first triode K1 are cut off. That is, if the controllable switch K2 is turned off, the battery 30 cannot charge the first capacitor C1 through the loop of the first transistor K1.
On the basis of the above embodiments, as an optional embodiment, after the soft start control circuit 1 is in an abnormal state and the controllable switch K2 is turned off, the method further includes:
and when the auxiliary power supply 20 consumes the electric quantity of the first capacitor C1, stopping the operation of the auxiliary power supply 20, wherein the electric quantity of the first capacitor C1 is obtained by supplying power to the battery 30 before the controllable switch K2 is switched off.
For example, since the capacitance effect of the capacitor may affect human health, it is necessary to completely discharge the electric quantity of the disconnected first capacitor C1. Because the first capacitor C1 is connected with the auxiliary power supply 20, the auxiliary power supply 20 consumes the electric quantity of the first capacitor C1, the controller 10 can collect the voltage of the first capacitor C1 in real time, and judge whether the discharging of the first capacitor C1 is finished through the voltage of the first capacitor C1. When the auxiliary power supply 20 consumes the electric quantity of the first capacitor C1 when the soft start control circuit 1 is abnormal, and when the controller 10 determines that the residual electric quantity of the first capacitor C1 is completely consumed, the auxiliary power supply 20 is controlled to stop working.
On the basis of the above embodiments, as an optional embodiment, after the soft-start control circuit 1 is in the abnormal state and the controllable switch K2 is turned off, the method further includes:
and generating an abnormity prompt, and sending the abnormity prompt to professional maintenance personnel so that the professional maintenance personnel can maintain the abnormal soft start control circuit in time.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure should not be limited thereby. It is intended that all equivalent variations and modifications made in accordance with the teachings of the present disclosure be covered thereby. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.
Claims (10)
1. A soft start control circuit comprising a soft start module (40), a battery (30), a controllable switch, a first capacitor, an auxiliary power supply (20), and a controller (10), wherein:
one end of the soft start module (40) is respectively connected with one end of the first capacitor, the first end of the auxiliary power supply (20), the first end of the controller (10) and the first end of the controllable switch, and the other end of the soft start module (40) is respectively connected with the anode of the battery (30) and the second end of the controllable switch;
the negative electrode of the battery (30) is respectively connected with the other end of the first capacitor and the second end of the auxiliary power supply (20);
the third end of the auxiliary power supply (20) is connected with the second end of the controller (10);
the third terminal of the controller (10) is connected with the third terminal of the controllable switch.
2. The soft start control circuit of claim 1, wherein the soft start module (40) comprises a first switch, a first resistor, a second resistor, a third resistor, a second capacitor, a third capacitor, a first transistor, and a first diode, wherein:
one end of the first resistor is connected with the cathode of the first diode, and the other end of the first resistor is respectively connected with the first end of the auxiliary power supply (20), the first end of the controller (10) and one end of the first capacitor;
an emitter of the first triode is respectively connected with an anode of the first diode, one end of the second capacitor and one end of the third capacitor; a collector of the first triode is respectively connected with the anode of the battery (30) and one end of the third resistor, and a base of the first triode is respectively connected with the other end of the third capacitor and one end of the first switch;
the other end of the first switch is connected with one end of the second resistor;
the other end of the second resistor is connected with the other end of the second capacitor and the other end of the third resistor respectively.
3. The soft-start control circuit of claim 2, wherein the soft-start module (40) further comprises a fourth resistor and a fourth capacitor, wherein:
one end of the fourth resistor is connected with a connection point of the first switch and the third capacitor, one end of the fourth capacitor and a collector of the first triode, and the other end of the fourth resistor is respectively connected with a connection point of the second capacitor and the third capacitor, the other end of the fourth capacitor, a connection point of an emitter of the first triode and an anode of the first diode.
4. The soft-start control circuit of claim 2, wherein the soft-start module (40) further comprises a first zener diode, wherein:
the anode of the first voltage stabilizing diode is connected with the connection point of the third resistor and the second capacitor, and the cathode of the first voltage stabilizing diode is connected with the connection point of the second capacitor and the fourth capacitor.
5. The soft-start control circuit of claim 1, wherein the controllable switch is one of a relay, a BJT, an SCR, a GTO, a P-MOSFET, an IGBT, an MCT, a SIT, and a BJT.
6. A soft-start control method, characterized by being applied to a controller (10) in a soft-start control circuit (1) of any one of claims 1-5, the method comprising:
collecting voltages of a first capacitor and a battery (30) to respectively obtain a first voltage and a second voltage, wherein the first capacitor voltage is obtained by charging a soft start module (40);
closing the controllable switch according to the first voltage and the second voltage;
collecting the first capacitor voltage to obtain a third voltage, wherein the third voltage is obtained by supplying power to the battery (30) after the controllable switch is closed;
analyzing whether the soft start control circuit (1) is in an abnormal state or not according to the third voltage;
and if the soft start control circuit (1) is in an abnormal state, the controllable switch is disconnected.
7. The soft-start control method of claim 6, wherein closing the controllable switch according to the first voltage and the second voltage comprises:
subtracting the first voltage from the second voltage to obtain a voltage difference value;
judging whether the voltage difference value is smaller than a starting threshold value or not;
and if the voltage difference value is smaller than the opening threshold value, closing the controllable switch.
8. The soft-start control method according to claim 6, wherein the analyzing whether the soft-start control circuit (1) is in an abnormal state according to the third voltage includes:
determining whether the third voltage drops to a shutdown threshold of the auxiliary power supply (20);
determining that the soft-start control circuit (1) is in an abnormal state if the third voltage drops to the shutdown threshold of the auxiliary power supply (20);
determining that the soft-start control circuit (1) is in a normal state if the third voltage does not drop to the shutdown threshold of the auxiliary power supply (20).
9. The soft-start control method according to claim 6, wherein, after the step of turning off the controllable switch if the soft-start control circuit is in an abnormal state, the method further comprises:
and when the auxiliary power supply (20) consumes the first capacitance electric quantity, stopping the operation of the auxiliary power supply (20), wherein the first capacitance electric quantity is obtained by supplying power to the battery (30) before the controllable switch is disconnected.
10. The soft-start control method according to claim 6, wherein the step of, after turning off the controllable switch if the soft-start control circuit (1) is in an abnormal state, further comprises:
and generating an abnormity prompt and sending the abnormity prompt to professional maintenance personnel.
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