CN211018273U - Reverse connection prevention direct-current high-voltage power supply control system - Google Patents
Reverse connection prevention direct-current high-voltage power supply control system Download PDFInfo
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- CN211018273U CN211018273U CN201922364759.9U CN201922364759U CN211018273U CN 211018273 U CN211018273 U CN 211018273U CN 201922364759 U CN201922364759 U CN 201922364759U CN 211018273 U CN211018273 U CN 211018273U
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Abstract
The utility model provides an anti-reverse direct current high voltage power supply control system, which comprises a thyristor high voltage anti-reverse connection circuit, a microcontroller, a high voltage bootstrap circuit module, a high voltage front acquisition module and a high voltage rear acquisition module; the thyristor high-voltage reverse connection preventing circuit is respectively connected with the direct-current high-voltage power supply input, the high-voltage bootstrap circuit module and the load; the high-voltage front acquisition module is respectively connected with the input end of the direct-current high-voltage power supply and the microcontroller and is used for acquiring the voltage of the input end of the direct-current high-voltage power supply; the high-voltage post-acquisition module is respectively connected with the load and the microcontroller and acquires the voltage of a load end; the high-voltage bootstrap circuit module is respectively connected with the thyristor high-voltage anti-reverse connection circuit and the microcontroller and controls the on-off of the thyristor high-voltage anti-reverse connection circuit. The utility model discloses a prevent reverse direct current high voltage power supply control system can make load system efficiency higher, more safe and reliable.
Description
Technical Field
The utility model relates to a new energy automobile high voltage power supply technical field especially relates to an it prevents direct current high voltage power supply control system to connect.
Background
In the new energy automobile, a trend of automobile development at present is that a direct current power supply is used as a power supply with more use, a diode reverse connection preventing circuit is generally used for reverse connection prevention measures under a high-voltage condition, and a heavy current system of the diode reverse connection preventing circuit is large in power consumption and serious in heating, so that a load system is low in efficiency and poor in safety performance, and cannot meet the increasing use requirements.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a prevent reverse connection direct current high voltage power supply control system can make load system efficiency higher, more safe and reliable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a reverse connection prevention direct current high-voltage power supply control system comprises a thyristor high-voltage reverse connection prevention circuit, a microcontroller, a high-voltage bootstrap circuit module, a high-voltage front acquisition module and a high-voltage rear acquisition module;
the thyristor high-voltage reverse connection preventing circuit is respectively connected with the direct-current high-voltage power supply input, the high-voltage bootstrap circuit module and the load;
the high-voltage front acquisition module is respectively connected with the input end of the direct-current high-voltage power supply and the microcontroller and is used for acquiring the voltage of the input end of the direct-current high-voltage power supply; the high-voltage post-acquisition module is respectively connected with the load and the microcontroller and acquires the voltage of a load end;
the high-voltage bootstrap circuit module is respectively connected with the thyristor high-voltage anti-reverse connection circuit and the microcontroller and controls the on-off of the thyristor high-voltage anti-reverse connection circuit.
The circuit is further improved as follows:
the device also comprises a low-voltage auxiliary power supply; the low-voltage auxiliary power supply is connected with the microcontroller.
In the above circuit, preferably, the thyristor high-voltage reverse connection preventing circuit includes a thyristor, a switching diode and a gate current limiting resistor;
the gate pole of the thyristor is connected with the gate pole current-limiting resistor; the anode of the thyristor is connected with the input of a direct-current high-voltage power supply; the cathode of the thyristor is connected with a load;
the gate pole current-limiting resistor is connected with the cathode of the switch diode; and the anode of the switching diode is connected with the high-voltage bootstrap circuit module.
In the above circuit, preferably, the circuit further includes a high-voltage low-current starting module; the high-voltage low-current starting module is respectively connected with a direct-current high-voltage power supply input and the high-voltage bootstrap circuit module.
Preferably, the device further comprises a thyristor protection module; the thyristor protection module is respectively connected with the thyristor gate pole and the anode of the load.
Preferably, the gate current limiting resistor is 255 ohms.
Preferably, the microcontroller is a single chip microcomputer.
According to the above technical scheme, the utility model discloses a prevent reverse connection direct current high voltage power supply control system adopts the high pressure, and the heavy current, the thyristor of low internal resistance constitutes main part thyristor high pressure and prevents reverse connection circuit, produces the bootstrap voltage that is higher than high-pressure input power through microcontroller control bootstrap circuit and opens and close the thyristor circuit, and effectual constitution direct current power supply prevents reverse connection to can freely control the circuit of turn-offs/opening high voltage power supply. The voltage of the direct-current high-voltage input end and the voltage reaching the load end are collected through the high-voltage front collecting module and the high-voltage rear collecting module, and the judgment is carried out through the microcontroller, so that whether the power supply is turned off or not is controlled, and the load system is higher in efficiency, safer and more reliable.
Drawings
Fig. 1 is a block diagram of an anti-reverse connection dc high-voltage power supply control system according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the present invention, which is used for preventing reverse connection of the dc high-voltage power supply control system.
Wherein R1-R20 are resistors; u1, U3 and U4 are thyristors; u2 is a precursor chip; D1-D10 are diodes; C1-C10 are capacitors; the ADC2_ MCU and the ADC1_ MCU are connected with the MCU.
Detailed Description
The technical solution of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to fig. 2, an embodiment of the present invention will first explain a structure and parameter conditions of an anti-reverse connection dc high-voltage power supply control system of the present invention.
As shown in fig. 1, the reverse connection prevention direct current high voltage power supply control system of the present embodiment;
the whole system consists of a thyristor high-voltage reverse-connection-preventing circuit, a microcontroller, a high-voltage bootstrap circuit module, a high-voltage front acquisition module, a high-voltage rear acquisition module and a low-voltage auxiliary power supply.
The high-voltage reverse connection preventing circuit of the thyristor abandons a reverse connection preventing circuit formed by a traditional diode, the thyristor with high voltage, large current and low internal resistance forms a main circuit, the microcontroller controls the high-voltage bootstrap circuit module to generate bootstrap voltage higher than a high-voltage input power supply to start and close the thyristor circuit, and a direct-current power supply reverse connection preventing circuit with low static state and free control of turning off/on of the high-voltage power supply is effectively formed. The high-voltage front acquisition system and the high-voltage rear acquisition system effectively acquire the voltage of the direct-current high-voltage input end and the voltage reaching the load end, and whether the power supply is turned off or not is effectively controlled through micro-control and accurate judgment.
The low-voltage auxiliary power supply only needs dozens of mA of current to work for the low-voltage control high voltage of the whole system.
Referring to fig. 2, fig. 2 is a specific circuit structure diagram of the reverse connection prevention dc high voltage power supply control system of the present embodiment. Wherein R1-R20 are resistors; u1, U3 and U4 are thyristors; u2 is a chip; D1-D10 are diodes; C1-C10 are capacitors; the ADC2_ MCU and the ADC1_ MCU are connected with the chip. The high-voltage starting bootstrap module comprises a microcontroller and a high-voltage bootstrap circuit module (hereinafter referred to as bootstrap circuit).
The working principle is that the high-voltage front acquisition module is composed of voltage dividing resistors R5, R7 and R11, filter capacitors C3 and C4 and a pulse protection diode D7, analog signals which can be detected by an MCU (microcontroller) are processed, the MCU judges the magnitude of input voltage according to the detected voltage value, so that whether a bootstrap circuit is started or not is judged, and when the input voltage is detected to be in a normal range, the MCU controls the bootstrap circuit and sequentially turns on U3 and U4. The C8 and C9 are charged and discharged, so that a bootstrap voltage higher than the input high voltage is generated. The high-voltage small-current starting module is composed of D5, R3, R4 and C2, and the R3, R4 and C2 are used for limiting current and filtering power-on ripples, so that an original safe starting high voltage of small current is provided to maintain a high-voltage source required by starting the bootstrap circuit. But not to damage the load as a result. The principle of the high-voltage rear acquisition module is the same as that of the high-voltage front acquisition module, and the MCU can judge whether the thyristor is in a cut-off state or a conducting state according to the voltage output by the ADC2_ MCU. The thyristor direction switch module is composed of a high-voltage and high-current thyristor, gate limiting resistors R1 and R2 and a fast switching diode D1, and specific parameters are adjusted according to the range of input voltage. When the MCU starts the bootstrap circuit to generate bootstrap voltage, the thyristors are started through D1, R1 and R2, at the moment, the thyristor U1 is completely conducted, and stable direct-current high-voltage is provided for a load. And ensuring the effective operation of the load. Meanwhile, the thyristor protection module formed by D4 and C1 stabilizes the thyristor turn-on voltage in a controllable range, thereby ensuring the long-term operation of the thyristor. The low voltage auxiliary power required by the MCU, VCC15V, may be provided by a common isolator power supply. The auxiliary power supply can be isolated by an electronic transformer to avoid abnormal high-voltage interference from being connected in series with the low-voltage system, thereby damaging the low-voltage system.
When the input of a system direct-current high-voltage power supply is reversely connected, the U1 thyristor is not conductive, no power supply is provided for the system, the unidirectional type of the unidirectional thyristor can effectively prevent the reverse connection of the power supply from burning out a power supply, when high-voltage direct current needs to be provided for a load, the microcontroller controls and collects signals of the ADC1_ MCU and the ADC2_ MCU so as to judge the high-voltage input state, the rectifier diode D5, the current-limiting resistors R2 and R4 and the high-voltage capacitor C2 form high impedance, the low-current high-voltage power supply for limiting current is used for providing a safe high-voltage power supply for the load system, and a starting ripple is filtered.
The reverse connection prevention direct-current high-voltage power supply control system of the embodiment enables a high-voltage output system to be safer, and solves the problem of serious heating caused by large voltage drop of the diode under a large current state. Therefore, the load system has higher efficiency and is safer and more reliable.
According to the above technical scheme, the utility model discloses a prevent reverse connection direct current high voltage power supply control system adopts the high pressure, and the heavy current, the thyristor of low internal resistance constitutes main part thyristor high pressure and prevents reverse connection circuit, produces the bootstrap voltage that is higher than high-pressure input power through microcontroller control bootstrap circuit and opens and close the thyristor circuit, and effectual constitution direct current power supply prevents reverse connection to can freely control the circuit of turn-offs/opening high voltage power supply. The voltage of the direct-current high-voltage input end and the voltage reaching the load end are collected through the high-voltage front collecting module and the high-voltage rear collecting module, and the judgment is carried out through the microcontroller, so that whether the power supply is turned off or not is controlled, and the load system is higher in efficiency, safer and more reliable.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A reverse connection prevention direct current high-voltage power supply control system is characterized by comprising a thyristor high-voltage reverse connection prevention circuit, a microcontroller, a high-voltage bootstrap circuit module, a high-voltage front acquisition module and a high-voltage rear acquisition module;
the thyristor high-voltage reverse connection preventing circuit is respectively connected with the direct-current high-voltage power supply input, the high-voltage bootstrap circuit module and the load;
the high-voltage front acquisition module is respectively connected with the input end of the direct-current high-voltage power supply and the microcontroller and is used for acquiring the voltage of the input end of the direct-current high-voltage power supply; the high-voltage post-acquisition module is respectively connected with the load and the microcontroller and acquires the voltage of a load end;
the high-voltage bootstrap circuit module is respectively connected with the thyristor high-voltage anti-reverse connection circuit and the microcontroller and controls the on-off of the thyristor high-voltage anti-reverse connection circuit.
2. The reverse-connection-prevention direct-current high-voltage power supply control system according to claim 1, further comprising a low-voltage auxiliary power supply; the low-voltage auxiliary power supply is connected with the microcontroller.
3. The reverse-connection-prevention direct-current high-voltage power supply control system according to claim 1, wherein the thyristor high-voltage reverse-connection-prevention circuit comprises a thyristor, a switching diode and a gate limiting resistor;
the gate pole of the thyristor is connected with the gate pole current-limiting resistor; the anode of the thyristor is connected with the input of a direct-current high-voltage power supply; the cathode of the thyristor is connected with a load;
the gate pole current-limiting resistor is connected with the cathode of the switch diode; and the anode of the switching diode is connected with the high-voltage bootstrap circuit module.
4. The reverse-connection-prevention direct-current high-voltage power supply control system according to claim 1, characterized by further comprising a high-voltage low-current starting module; the high-voltage low-current starting module is respectively connected with a direct-current high-voltage power supply input and the high-voltage bootstrap circuit module.
5. The reverse-connection-prevention direct-current high-voltage power supply control system according to claim 3, further comprising a thyristor protection module; the thyristor protection module is respectively connected with the thyristor gate pole and the anode of the load.
6. The system according to claim 3, wherein the gate current limiting resistor has a resistance of 255 ohms.
7. The reverse-connection-prevention direct-current high-voltage power supply control system according to claim 1, wherein the microcontroller is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922364759.9U CN211018273U (en) | 2019-12-25 | 2019-12-25 | Reverse connection prevention direct-current high-voltage power supply control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922364759.9U CN211018273U (en) | 2019-12-25 | 2019-12-25 | Reverse connection prevention direct-current high-voltage power supply control system |
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| CN211018273U true CN211018273U (en) | 2020-07-14 |
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| CN201922364759.9U Active CN211018273U (en) | 2019-12-25 | 2019-12-25 | Reverse connection prevention direct-current high-voltage power supply control system |
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Denomination of utility model: A Control System for Anti Reverse Connection DC High Voltage Power Supply Effective date of registration: 20231228 Granted publication date: 20200714 Pledgee: Postal Savings Bank of China Limited Wangcheng County sub branch Pledgor: Hunan Haibo Intelligent Control Technology Co.,Ltd. Registration number: Y2023980075069 |