CN217282691U - Soft switch distributed energy supply converter startup peak suppression circuit - Google Patents
Soft switch distributed energy supply converter startup peak suppression circuit Download PDFInfo
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- CN217282691U CN217282691U CN202220456660.0U CN202220456660U CN217282691U CN 217282691 U CN217282691 U CN 217282691U CN 202220456660 U CN202220456660 U CN 202220456660U CN 217282691 U CN217282691 U CN 217282691U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a soft switch distributed energy supply converter startup peak suppression circuit, which comprises a controller, an energy supply power supply, a driver, a switch module, a peak suppression module, a temperature detection module and an energy supply conversion module; the driver is connected with the controller; the switch module is respectively connected with the driver and the energy supply power supply; the peak suppression module is connected with the switch module; the temperature detection module is connected with the controller; and the energy supply conversion module is respectively connected with the switch module and the energy supply output port. The utility model discloses a set up temperature detection module, can play the guard action when converter abnormal work is under hard on-off state, in time convert soft switch or close the driver output into to guarantee that power device is not damaged.
Description
Technical Field
The utility model relates to a soft switch resonant converter technical field especially relates to a soft switch distributing type energy supply converter plays machine peak suppression circuit.
Background
The existing soft switching converter is mainly realized through resonance, but soft switching cannot be realized in a startup stage, and a high peak voltage is generated on a power device (such as a MOS transistor) to cause damage to the power device.
Most solutions mainly avoid the hard switching problem in the startup stage by selecting a power device with higher withstand voltage or adding a larger RC absorption circuit, but the manufacturing cost is too high, the circuit is complex, the reliability is low, and the converter cannot play a role in protection when abnormally working in a hard switching state.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a soft switch distributing type energy supply converter plays quick-witted peak suppression circuit aims at solving prior art, can't play the problem of guard action when converter abnormal work is under hard on-off state.
The embodiment of the utility model provides a soft switch distributing type energy supply converter plays machine peak suppression circuit, include:
a controller;
an energy supply source;
the driver is connected with the controller;
the switch module is respectively connected with the driver and the energy supply power supply, and the controller controls the driver to drive the switch module to carry out switching operation;
the peak suppression module is connected with the switch module and used for absorbing and suppressing a peak voltage generated by the switch module in a starting stage;
the temperature detection module is connected with the controller and used for detecting the temperature of the spike suppression module and sending a judgment signal to the controller, and the controller controls the driver to drive the switch module to carry out switching operation based on the judgment signal;
energy supply transform module connects respectively switch module and energy supply output port, energy supply transform module is used for when switch module opens, right energy supply power carries out energy conversion, in order to right energy supply output port output.
The peak voltage generated by the power device on the switch module is absorbed and suppressed through the peak suppression module, the damage of the power device is avoided, the working state of the peak suppression module is monitored through the temperature detection module, the working state of the peak suppression module is fed back in real time, when the converter works in a hard switch state in a non-startup stage, the working state can be fed back to the controller in time, the controller judges according to a preset flow, the closed-loop control circuit returns to a soft switch, or the driver is driven to close the output control of the switch module.
In the circuit, because the peak suppression module is arranged, the switch module can use power device MOS tubes with lower manufacturing cost, and the like, the cost is reduced, and the circuit is simple to realize (the peak suppression module can be TVS and other similar devices, and the temperature detection module can be composed of a thermistor and other detection circuits); the protection function can be realized when the converter abnormally works in a hard switching state, and the converter is timely converted into a soft switching state or the driver output is closed, so that the power device is prevented from being damaged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a soft-switching distributed energy supply converter startup spike suppression circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a soft-switching distributed energy supply converter startup spike suppression circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a hardware over-temperature protection circuit of a soft-switch distributed energy supply converter startup spike suppression circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that 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 in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1-2, a soft-switching distributed energy converter start-up spike suppression circuit includes:
a controller;
an energy supply source;
the driver is connected with the controller;
the switch module is respectively connected with the driver and the energy supply power supply, and the controller controls the driver to drive the switch module to carry out switching operation;
the peak suppression module is connected with the switch module and used for absorbing and suppressing a peak voltage generated by the switch module in a starting stage;
the temperature detection module is connected with the controller and used for detecting the temperature of the spike suppression module and sending a judgment signal to the controller, and the controller controls the driver to drive the switch module to carry out switching operation based on the judgment signal;
energy supply transform module connects respectively switch module and energy supply output port, energy supply transform module is used for when switch module opens, it is right energy conversion is carried out to the energy supply power, in order to right energy supply output port output.
In one embodiment, peak voltage generated by a power device on a switch module is absorbed and suppressed through a peak suppression module, so that the power device is prevented from being damaged, the working state of the peak suppression module is monitored through a temperature detection module, the working state (temperature) of the peak suppression module is fed back in real time, when a converter works in a hard switch state in a non-startup stage abnormally, a temperature signal can be fed back to a controller in time, the controller judges according to a preset flow, a closed-loop control circuit returns to a soft switch, or a driver is driven to close output control to the switch module.
In the circuit, because the peak suppression module is arranged, the switch module can use power device MOS tubes with lower manufacturing cost, and the like, the cost is reduced, and the circuit is simple to realize (the peak suppression module can be TVS and other similar devices, and the temperature detection module can be composed of a thermistor and other detection circuits); the protection function can be realized when the converter abnormally works in a hard switching state, and the converter is timely converted into a soft switching state or the driver output is closed, so that the power device is prevented from being damaged.
Specifically, the controller controls the driver through the first control signal, and the driver drives the switch module through the second control signal.
Wherein, the controller may be an MCU.
The switch module can be an MOS tube.
Wherein, the energy supply conversion module is a resonant converter.
In the following description, since most circuits are symmetrical, it is sometimes stated that 1 and 2 in the device are not distinguished and will not be understood as misleading.
In an embodiment, the switch module includes an NMOS transistor QT1 and an NMOS transistor QT2, gates of the NMOS transistor QT1 and the NMOS transistor QT2 are respectively connected to the driver, sources of the NMOS transistor QT1 and the NMOS transistor QT2 are respectively connected to a negative electrode of the energy supply, drains of the NMOS transistor QT1 and the NMOS transistor QT2 are respectively connected to a positive electrode of the energy supply through the energy supply conversion module.
In the embodiment, in the hard switching state in the startup phase, the NMOS transistor QT1 and the NMOS transistor QT2 generate a high spike voltage, and absorption suppression is performed by the spike suppression module.
Specifically, the energy supply power supply is an input power supply of the energy supply converter so as to provide corresponding energy which is converted by the energy supply conversion module and then output.
In an embodiment, the spike suppression module includes a transient suppression diode TVS1 and a transient suppression diode TVS2, an anode of the transient suppression diode TVS1 is connected to the source of the NMOS transistor QT1, a cathode of the transient suppression diode TVS1 is connected to the drain of the NMOS transistor QT1, an anode of the transient suppression diode TVS2 is connected to the source of the NMOS transistor QT2, and a cathode of the transient suppression diode TVS2 is connected to the drain of the NMOS transistor QT 2.
In this embodiment, the transient suppression diode TVS1 and the transient suppression diode TVS2 respectively absorb and suppress spike voltages generated by the two groups of NMOS transistors, thereby preventing the NMOS transistors from being damaged due to higher spike voltages.
In an embodiment, the energy conversion module includes a transformer TF1, the input winding of the transformer TF1 includes a first input winding and a second input winding, the first input winding is respectively connected to the drain of the NMOS transistor QT1 and the anode of the energy supply, and the second input winding is respectively connected to the drain of the NMOS transistor QT2 and the anode of the energy supply.
In this embodiment, only the connection relationship between the devices of the partial resonant converter and each module is disclosed, and the specific implementation of the resonant converter may refer to the existing resonant converter or refer to the drawings.
In an embodiment, the switch module includes a resistor R3, a resistor R4, a resistor R5, and a resistor R6, the resistor R3 is disposed between the gate of the NMOS transistor QT1 and the driver, and the resistor R4 is disposed between the gate of the NMOS transistor QT1 and the source of the NMOS transistor QT 1;
the resistor R5 is arranged between the grid of the NMOS tube QT2 and the driver, and the resistor R6 is arranged between the grid of the NMOS tube QT2 and the source of the NMOS tube QT 2.
In one embodiment, a polarity capacitor E1 is disposed between the positive electrode and the negative electrode of the energy supply source, the positive electrode of the polarity capacitor E1 is connected to the positive electrode of the energy supply source, and the negative electrode of the polarity capacitor E1 is connected to the negative electrode of the energy supply source.
In the present embodiment, the filtering is performed by a polar capacitor E1.
In one embodiment, the temperature detection module comprises a thermistor NTC1 and a thermistor NTC2, one end of each of the thermistor NTC1 and the thermistor NTC2 is grounded, the other end of the thermistor NTC1 is connected with a pull-up power supply through a resistor R1, the other end of the thermistor NTC1 is connected with the controller, the other end of the thermistor NTC2 is connected with the pull-up power supply through a resistor R2, and the other end of the thermistor NTC2 is connected with the controller.
In this embodiment, by setting the pull-up power supply, the controller always detects a higher voltage when the thermistor normally works, and the resistance value of the thermistor is gradually reduced as the detected temperature rises, so that the voltage at the end of the thermistor connected with the controller is gradually reduced; because the resistance value of the thermistor is continuously changed in the temperature rise process, the controller can judge the absolute temperature and the temperature climbing slope according to the detected voltage change curve, judge whether the controller works in an abnormal state or not, and carry out closed-loop control on the controller if the controller works in the abnormal state, so that the controller returns to a soft switching state, and the temperature of the peak suppression module is reduced.
Referring to fig. 3, in an embodiment, the temperature detecting module further includes a comparator U1A and a comparator U1B, a positive input pin of the comparator U1A is connected to the other end of the thermistor NTC1, a negative input pin of the comparator U1A is connected to the pull-up power source through a resistor R7, a negative input pin of the comparator U1A is grounded through a resistor R8, and an output terminal of the comparator U1A is connected to the OTP pin of the controller through a reverse diode D5;
the positive input pin of the comparator U1B is connected with the other end of the thermistor NTC2, the negative input pin of the comparator U1B is connected with the negative input pin of the comparator U1A, and the output end of the comparator U1B is connected with the OTP pin of the controller through a reverse diode D6;
the OTP pin of the controller is connected with the pull-up power supply through a resistor R11.
In this embodiment, by setting the comparator, after the thermistor is heated to a certain over-temperature threshold, a lower voltage (which may be called as a preset voltage, and the voltage may be adjusted according to actual conditions, and is specifically related to a voltage value on the negative input pin of the comparator) is formed at one end (a positive input pin of the comparator) where the thermistor is connected to the comparator, that is, when the voltage value of the positive input pin of the comparator is smaller than the voltage value of the negative input pin of the corresponding comparator, the output end of the corresponding comparator outputs a low level, and otherwise outputs a high level), at this time, the output end of the comparator generates a low level, and the OTP pin of the controller is synchronously set to the low level.
Specifically, in the previous embodiment (software protection mode), if the temperature continues to rise after adjustment, and reaches a preset over-temperature threshold, the OTP signal for hardware over-temperature protection in this embodiment is triggered (changed to a low level), and the MCU drives the driver to turn off the driving signal of the switch module after receiving the OTP signal.
Specifically, the negative input pin of the comparator always has a voltage greater than 0 by pulling up the power supply and the resistor R8.
The voltage at the end (positive input pin of the comparator) where the thermistor is connected with the comparator becomes gradually smaller, and when the voltage value of the positive input pin of the comparator is smaller than that of the negative input pin of the comparator, the output end of the comparator outputs a low level, and at the moment, the OTP pin receives a low level signal.
Specifically, the power supply access port of the comparator is respectively connected with a pull-up power supply and a ground, and one end of the pull-up power supply is connected with a grounded capacitor C100 in parallel.
Specifically, in fig. 3, the comparator U1B and the comparator U1A are 8-pin devices.
In one embodiment, a resistor R9 is disposed between the positive input pin of the comparator U1A and the thermistor NTC 1:
a resistor R10 is arranged between the positive input pin of the comparator U1B and the thermistor NTC 2;
the positive input pin of the comparator U1A is grounded through a capacitor C120;
the positive input pin of the comparator U1B is connected to ground through a capacitor C110.
In the present embodiment, resistor R9 and capacitor C120 form an RC filter.
Resistor R10 and capacitor C110 form an RC filter.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A soft-switching distributed energy converter startup spike suppression circuit, comprising:
a controller;
an energy supply source;
the driver is connected with the controller;
the switch module is respectively connected with the driver and the energy supply power supply, and the controller controls the driver to drive the switch module to carry out switching operation;
the peak suppression module is connected with the switch module and used for absorbing and suppressing a peak voltage generated by the switch module in a starting stage;
the temperature detection module is connected with the controller and is used for detecting the temperature of the spike suppression module and sending a judgment signal to the controller, and the controller controls the driver to drive the switch module to carry out switching operation based on the judgment signal;
energy supply transform module connects respectively switch module and energy supply output port, energy supply transform module is used for when switch module opens, it is right energy conversion is carried out to the energy supply power, in order to right energy supply output port output.
2. The soft-switched distributed energy converter startup spike suppression circuit of claim 1, wherein: the switch module comprises an NMOS tube QT1 and an NMOS tube QT2, the grids of the NMOS tube QT1 and the NMOS tube QT2 are respectively connected with the driver, the sources of the NMOS tube QT1 and the source of the NMOS tube QT2 are respectively connected with the negative electrode of the energy supply source, and the drain electrodes of the NMOS tube QT1 and the drain electrode of the NMOS tube QT2 are respectively connected with the energy supply conversion module.
3. The soft-switched distributed energy converter startup spike suppression circuit of claim 2, wherein: the peak suppression module comprises a transient suppression diode TVS1 and a transient suppression diode TVS2, the anode of the transient suppression diode TVS1 is connected with the source electrode of the NMOS tube QT1, the cathode of the transient suppression diode TVS1 is connected with the drain electrode of the NMOS tube QT1, the anode of the transient suppression diode TVS2 is connected with the source electrode of the NMOS tube QT2, and the cathode of the transient suppression diode TVS2 is connected with the drain electrode of the NMOS tube QT 2.
4. The soft-switched distributed power converter startup spike suppression circuit of claim 2, wherein: the energy supply conversion module comprises a transformer TF1, the input winding of the transformer TF1 comprises a first input winding and a second input winding, the first input winding is connected with the drain of the NMOS pipe QT1 and the anode of the energy supply source respectively, and the second input winding is connected with the drain of the NMOS pipe QT2 and the anode of the energy supply source respectively.
5. The soft-switched distributed power converter startup spike suppression circuit of claim 3, wherein: the switch module comprises a resistor R3, a resistor R4, a resistor R5 and a resistor R6, wherein the resistor R3 is arranged between the gate of the NMOS tube QT1 and the driver, and the resistor R4 is arranged between the gate of the NMOS tube QT1 and the source of the NMOS tube QT 1;
the resistor R5 is arranged between the grid electrode of the NMOS tube QT2 and the driver, and the resistor R6 is arranged between the grid electrode of the NMOS tube QT2 and the source electrode of the NMOS tube QT 2.
6. The soft-switched distributed energy converter startup spike suppression circuit of claim 1, wherein: set up polarity electric capacity E1 between the positive pole and the negative pole of energy supply, the anodal connection of polarity electric capacity E1 the positive pole of energy supply, the negative pole of polarity electric capacity E1 is connected the negative pole of energy supply.
7. The soft-switched distributed energy converter startup spike suppression circuit of claim 1, wherein: the temperature detection module includes thermistor NTC1 and thermistor NTC2, thermistor NTC1 and thermistor NTC 2's one end ground connection respectively, thermistor NTC 1's the other end passes through resistance R1 and connects and draw the power, thermistor NTC 1's the other end is connected the controller, thermistor NTC 2's the other end passes through resistance R2 and connects draw the power, thermistor NTC 2's the other end is connected the controller.
8. The soft-switched distributed energy converter startup spike suppression circuit of claim 7, wherein: the temperature detection module further comprises a comparator U1A and a comparator U1B, wherein a positive input pin of the comparator U1A is connected with the other end of the thermistor NTC1, a negative input pin of the comparator U1A is connected with the pull-up power supply through a resistor R7, a negative input pin of the comparator U1A is grounded through a resistor R8, and an output end of the comparator U1A is connected with an OTP pin of the controller through a reverse diode D5;
the positive input pin of the comparator U1B is connected with the other end of the thermistor NTC2, the negative input pin of the comparator U1B is connected with the negative input pin of the comparator U1A, and the output end of the comparator U1B is connected with the OTP pin of the controller through a reverse diode D6;
the OTP pin of the controller is connected with the pull-up power supply through a resistor R11.
9. The soft-switched distributed energy converter startup spike suppression circuit of claim 8, wherein:
a resistor R9 is arranged between the positive input pin of the comparator U1A and the thermistor NTC 1;
a resistor R10 is arranged between the positive input pin of the comparator U1B and the thermistor NTC 2;
the positive input pin of the comparator U1A is grounded through a capacitor C120;
the positive input pin of the comparator U1B is connected to ground through a capacitor C110.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220456660.0U CN217282691U (en) | 2022-03-03 | 2022-03-03 | Soft switch distributed energy supply converter startup peak suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220456660.0U CN217282691U (en) | 2022-03-03 | 2022-03-03 | Soft switch distributed energy supply converter startup peak suppression circuit |
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| CN217282691U true CN217282691U (en) | 2022-08-23 |
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| CN202220456660.0U Active CN217282691U (en) | 2022-03-03 | 2022-03-03 | Soft switch distributed energy supply converter startup peak suppression circuit |
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