CN217590632U - Inverter control circuit - Google Patents
Inverter control circuit Download PDFInfo
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- CN217590632U CN217590632U CN202220683799.9U CN202220683799U CN217590632U CN 217590632 U CN217590632 U CN 217590632U CN 202220683799 U CN202220683799 U CN 202220683799U CN 217590632 U CN217590632 U CN 217590632U
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Abstract
The utility model discloses an inverter control circuit, including power input module, mainboard control module, supplementary power module and drive protection module, power input module respectively with mainboard control module the input electricity of supplementary power module is connected, mainboard control module's control end with drive protection module electricity is connected, supplementary power module's power supply output with drive protection module electricity is connected. The utility model relates to an inverter control circuit, through setting up supplementary power module, can provide the VCC power for the protection circuit or the drive circuit of front and back level, compare in traditional directness and provide each protection circuit by the mainboard, when the system will protect appearing, then can not break off protection circuit's power supply for protection circuit can continuously work, and then makes whole circuit can carry out the protection of each function, thereby can improve circuit's stability and reliability.
Description
Technical Field
The utility model relates to an inverter control field especially relates to an inverter control circuit.
Background
In a traditional inverter circuit, a protection circuit of the inverter circuit is directly powered by VCC on a mainboard, and when protection is needed, the protection circuit can be immediately disconnected, so that the protection of the whole circuit is realized. However, this protection method is easy to cause the whole circuit to directly disconnect the VCC power supply, and the protection circuit may also need to perform various kinds of voltage, current or driving protection, i.e., before disconnecting the VCC power supply, it still needs to detect and protect each stage of circuit first, and then can finally switch off; if VCC is directly turned off, some functional circuits may not be protected, and a large current at the moment of short circuit may break down the switching tube of each functional circuit, thereby reducing the stability of the circuit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide an inverter control circuit.
The purpose of the utility model is realized through the following technical scheme:
an inverter control circuit comprising: the power supply protection device comprises a power supply input module, a mainboard control module, an auxiliary power supply module and a drive protection module, wherein the power supply input module is respectively and electrically connected with the input ends of the mainboard control module and the auxiliary power supply module;
the auxiliary power supply module comprises a filtering unit, a PWM chip unit, an MOS tube switch unit, an isolation transformation unit and a voltage stabilization unit, wherein the input end of the filtering unit is electrically connected with the output end of the power input module, the output end of the filtering unit is electrically connected with the power input end of the PWM chip unit, the PWM chip unit is electrically connected with the G electrode of the MOS tube switch unit, the D electrode of the MOS tube switch unit is electrically connected with the input end of the isolation transformation unit, the output end of the isolation transformation unit is electrically connected with the voltage stabilization unit, and the output end of the voltage stabilization unit is electrically connected with the drive protection module.
Preferably, the filtering unit includes a plurality of filtering capacitors connected in parallel, one end of each filtering capacitor is connected to the output end of the power input module, and the other end of each filtering capacitor is grounded.
Preferably, the PWM chip unit includes a starting resistor R1, a feedback branch and a PWM chip, the power input end of the starting resistor R1 is electrically connected to the filtering unit, the output end of the starting resistor R1 is electrically connected to the PWM chip, the output end of the PWM chip is electrically connected to the MOS transistor switch unit, and the feedback branch is electrically connected to the PWM chip and the isolation transforming unit, respectively.
Preferably, the feedback branch includes a resistor R8, a resistor R9, a resistor R18, and a diode D2, a first end of the resistor R8 outputs a voltage of +12V, a second end of the resistor R8 is electrically connected to the resistor R9 and the resistor R18, respectively, and the other end of the resistor R9 is electrically connected to the Vfb pin of the PWM chip.
Preferably, the MOS transistor switching unit includes a resistor R38, a resistor R58, and a MOS transistor Q5, a first end of the resistor R38 is electrically connected to the control end of the PWM chip, a second end of the resistor R38 is electrically connected to a G electrode of the MOS transistor Q5, a D electrode of the MOS transistor Q5 is electrically connected to the isolation transformer unit, and two ends of the resistor R58 are respectively electrically connected to the second end of the resistor R38 and the S electrode of the MOS transistor Q5.
Preferably, the isolation transforming unit includes a transformer T1, a diode D3 and a capacitor C47, a primary of the transformer T1 is electrically connected to the filtering unit, a secondary of the transformer T1 is electrically connected to the diode D3 and the capacitor C47, respectively, and a cathode of the diode D3 is electrically connected to the voltage stabilizing unit.
Preferably, the voltage stabilizing unit includes an LDO voltage stabilizing branch and a voltage reducing branch, the LDO voltage stabilizing branch is electrically connected to the output end of the isolation transformer unit, the output end of the LDO voltage stabilizing branch is electrically connected to the voltage reducing branch, the LDO voltage stabilizing branch is used for outputting +15V voltage, and the voltage reducing branch is used for outputting +5V voltage.
Preferably, the LDO voltage regulation branch includes an LDO voltage regulation chip, and an input capacitor C22 and an output capacitor C23 connected to the LDO voltage regulation chip.
The utility model discloses compare in prior art's advantage and beneficial effect as follows:
the utility model relates to an inverter control circuit, through setting up supplementary power module, can provide the VCC power for the protection circuit or the drive circuit of front and back level, compare in traditional directness and provide each protection circuit by the mainboard, when the system will protect appearing, then can not break off protection circuit's power supply for protection circuit can continuously work, and then makes whole circuit can carry out the protection of each function, thereby can improve circuit's stability and reliability.
Drawings
Fig. 1 is a schematic structural diagram of an inverter control circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of the auxiliary power module shown in FIG. 1;
FIG. 3 is a circuit diagram of a power input module of the inverter control circuit shown in FIG. 1;
FIG. 4 is a circuit diagram of another embodiment of a power input module;
fig. 5 is a circuit diagram of a driving protection module according to an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, an inverter control circuit includes: the power supply protection device comprises a power supply input module 100, a mainboard control module 200, an auxiliary power supply module 300 and a drive protection module 400, wherein the power supply input module is respectively electrically connected with the mainboard control module and the input end of the auxiliary power supply module, the control end of the mainboard control module is electrically connected with the drive protection module, and the power supply output end of the auxiliary power supply module is electrically connected with the drive protection module. It should be noted that the power input module 100 is configured to output a power voltage; the motherboard control module 200 is used to control each functional module in the circuit, such as a driving protection module; the auxiliary power supply module 300 is used for supplying power to the driving protection module; the driving protection module 400 is used for realizing driving and protection.
The auxiliary power supply module 300 comprises a filtering unit 310, a PWM chip unit 320, a MOS transistor switch unit 330, an isolation transformer unit 340 and a voltage stabilizing unit 350, wherein an input end of the filtering unit is electrically connected with an output end of the power input module, an output end of the filtering unit is electrically connected with a power input end of the PWM chip unit, the PWM chip unit is electrically connected with a G pole of the MOS transistor switch unit, a D pole of the MOS transistor switch unit is electrically connected with an input end of the isolation transformer unit, an output end of the isolation transformer unit is electrically connected with the voltage stabilizing unit, and an output end of the voltage stabilizing unit is electrically connected with the driving protection module. It should be noted that the filtering unit 310 is configured to perform a filtering function, and the PWM chip unit 320 is configured to perform a control on the auxiliary power supply module; the MOS transistor switch unit 330 is used for controlling the on or off of the transformer; the isolation transformation unit 340 is used for playing an isolation role and improving the stability of the circuit; the voltage stabilizing unit 350 is used for stabilizing voltage, stabilizing VCC at 15V voltage and outputting the voltage, and in addition, reducing the voltage to 5V voltage and outputting the voltage.
So, through setting up supplementary power module 300, can provide the VCC power for the protection circuit or the drive circuit of front and back level, compare in traditional direct each protection circuit that is provided by the mainboard, when the system will protect appearing, then can not break off protection circuit's power supply for protection circuit can continuously work, and then makes whole circuit can carry out the protection of each function, thereby can improve the stability and the reliability of circuit.
Further, when being provided with auxiliary power supply module, then can be with the voltage on the mainboard, voltage on the power input module is direct supplies power to each drive protection module through auxiliary power supply module promptly for when needs protect, then protection circuit can continuously protect, can not interrupted, has improved the stability of circuit.
Referring to fig. 2, the filter unit includes a plurality of filter capacitors connected in parallel, one end of each filter capacitor is connected to the output end of the power input module, and the other end of each filter capacitor is grounded. Therefore, the filtering capacitor is arranged, so that the filtering effect can be achieved, and the voltage input into the PWM chip unit is more stable.
Referring to fig. 2, the PWM chip unit includes a starting resistor R1, a feedback branch and a PWM chip, a power input end of the starting resistor R1 is electrically connected to the filtering unit, an output end of the starting resistor R1 is electrically connected to the PWM chip, an output end of the PWM chip is electrically connected to the MOS transistor switch unit, and the feedback branch is electrically connected to the PWM chip and the isolation transformer unit, respectively. Therefore, the PWM chip is arranged to play a role in control.
Further, the feedback branch comprises a resistor R8, a resistor R9, a resistor R18 and a diode D2, wherein a +12V voltage is output from a first end of the resistor R8, a second end of the resistor R8 is electrically connected to the resistor R9 and the resistor R18, respectively, and the other end of the resistor R9 is electrically connected to a Vfb pin of the PWM chip. In this way, by providing the resistor R8, the resistor R9, the resistor R18, and the diode D2, a feedback function can be performed, so that the output voltage is more stable.
Specifically, referring to fig. 2, the MOS switch unit includes a resistor R38, a resistor R58, and a MOS Q5, a first end of the resistor R38 is electrically connected to the control end of the MCU processor, a second end of the resistor R38 is electrically connected to a G electrode of the MOS Q5, a D electrode of the MOS Q5 is electrically connected to the isolation transformer unit, and two ends of the resistor R58 are respectively electrically connected to the second end of the resistor R38 and the S electrode of the MOS Q5. By providing the resistor R38, the resistor R58, and the MOS transistor Q5 in this manner, a switching function can be performed to control whether or not power is supplied to the transformer.
Referring to fig. 2, the isolation transforming unit includes a transformer T1, a diode D3 and a capacitor C47, a primary of the transformer T1 is electrically connected to the PWM chip unit, a secondary of the transformer T1 is electrically connected to the diode D3 and the capacitor C47, respectively, and a cathode of the diode D3 is electrically connected to the voltage stabilizing unit. Therefore, the transformer T1, the diode D3 and the capacitor C47 are arranged, so that the isolation effect can be achieved, and the output voltage is safer and more stable.
Specifically, a primary output end (+ 12V) of the transformer of the isolation transformer unit is output to a front-stage driving chip, and in a primary output end (+ 12V 1) of the transformer in the front-stage driving circuit, a secondary output end of the transformer is output to the driving protection module and the rear-stage MCU processor through the voltage stabilizing unit. In addition, the VDC connected with the filtering unit is input voltage, such as output voltage of a battery and the like, and the VDC is also connected to the singlechip for detecting the input voltage, so that overvoltage and undervoltage protection can be realized.
It should be noted that the voltage stabilizing unit includes an LDO voltage stabilizing branch and a voltage dropping branch, the LDO voltage stabilizing branch is electrically connected to the output end of the isolation transformer unit, the output end of the LDO voltage stabilizing branch is electrically connected to the voltage dropping branch, the LDO voltage stabilizing branch is used to output a voltage of +15V, and the voltage dropping branch is used to output a voltage of + 5V. Therefore, by arranging the LDO voltage stabilizing branch and the voltage reducing branch, the voltages of 15V and 5V can be improved for each level of driving module and control module.
Further, the LDO voltage regulation branch comprises an LDO voltage regulation chip, and an input capacitor C22 and an output capacitor C23 which are connected with the LDO voltage regulation chip. So, through setting up LDO regulator chip, can improve output voltage's stability.
Referring to fig. 3, fig. 3 is a circuit diagram of a power input module of the inverter control circuit shown in fig. 1; the power input module includes an input filter unit, a VCC switch control unit, and a boost conversion filter unit, please refer to fig. 4, fig. 4 is a circuit diagram of the power input module according to another embodiment; fig. 4 shows a boost drive unit including a power input module. Referring to fig. 5, fig. 5 is a circuit diagram of a driving protection module according to an embodiment of the invention.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more 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 (8)
1. An inverter control circuit, comprising: the power supply protection device comprises a power supply input module, a mainboard control module, an auxiliary power supply module and a drive protection module, wherein the power supply input module is respectively and electrically connected with the input ends of the mainboard control module and the auxiliary power supply module;
the auxiliary power supply module comprises a filtering unit, a PWM chip unit, an MOS tube switch unit, an isolation voltage transformation unit and a voltage stabilization unit, wherein the input end of the filtering unit is electrically connected with the output end of the power input module, the output end of the filtering unit is electrically connected with the power input end of the PWM chip unit, the PWM chip unit is electrically connected with the G electrode of the MOS tube switch unit, the D electrode of the MOS tube switch unit is electrically connected with the input end of the isolation voltage transformation unit, the output end of the isolation voltage transformation unit is electrically connected with the voltage stabilization unit, and the output end of the voltage stabilization unit is electrically connected with the drive protection module.
2. The inverter control circuit according to claim 1, wherein the filter unit includes a plurality of filter capacitors connected in parallel, one end of each filter capacitor is connected to the output terminal of the power input module, and the other end of each filter capacitor is grounded.
3. The inverter control circuit according to claim 1, wherein the PWM chip unit includes a starting resistor R1, a feedback branch and a PWM chip, a power input end of the starting resistor R1 is electrically connected to the filtering unit, an output end of the starting resistor R1 is electrically connected to the PWM chip, an output end of the PWM chip is electrically connected to the MOS transistor switching unit, and the feedback branch is electrically connected to the PWM chip and the isolation transformer unit, respectively.
4. The inverter control circuit according to claim 3, wherein the feedback branch comprises a resistor R8, a resistor R9, a resistor R18 and a diode D2, a first end of the resistor R8 outputs +12V voltage, a second end of the resistor R8 is electrically connected to the resistor R9 and the resistor R18, respectively, and the other end of the resistor R9 is electrically connected to the Vfb pin of the PWM chip.
5. The inverter control circuit according to claim 2, wherein the MOS transistor switching unit includes a resistor R38, a resistor R58, and a MOS transistor Q5, a first end of the resistor R38 is electrically connected to the control terminal of the PWM chip, a second end of the resistor R38 is electrically connected to a G electrode of the MOS transistor Q5, a D electrode of the MOS transistor Q5 is electrically connected to the isolation transformer unit, and two ends of the resistor R58 are respectively electrically connected to a second end of the resistor R38 and an S electrode of the MOS transistor Q5.
6. The inverter control circuit according to claim 1, wherein the isolation transforming unit comprises a transformer T1, a diode D3 and a capacitor C47, a primary of the transformer T1 is electrically connected to the filtering unit, a secondary of the transformer T1 is electrically connected to the diode D3 and the capacitor C47, respectively, and a cathode of the diode D3 is electrically connected to the voltage stabilizing unit.
7. The inverter control circuit according to claim 1, wherein the voltage regulation unit comprises an LDO voltage regulation branch and a voltage reduction branch, the LDO voltage regulation branch is electrically connected to the output terminal of the isolation transformer unit, the output terminal of the LDO voltage regulation branch is electrically connected to the voltage reduction branch, and the LDO voltage regulation branch is used for outputting +15V voltage, and the voltage reduction branch is used for outputting +5V voltage.
8. The inverter control circuit of claim 7, wherein the LDO regulation branch comprises an LDO regulation chip and an input capacitor C22 and an output capacitor C23 connected to the LDO regulation chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220683799.9U CN217590632U (en) | 2022-03-25 | 2022-03-25 | Inverter control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220683799.9U CN217590632U (en) | 2022-03-25 | 2022-03-25 | Inverter control circuit |
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| Publication Number | Publication Date |
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| CN217590632U true CN217590632U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220683799.9U Active CN217590632U (en) | 2022-03-25 | 2022-03-25 | Inverter control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115664184A (en) * | 2022-12-23 | 2023-01-31 | 上海芯浦科技有限公司 | Chip unlocking and power supply system |
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2022
- 2022-03-25 CN CN202220683799.9U patent/CN217590632U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115664184A (en) * | 2022-12-23 | 2023-01-31 | 上海芯浦科技有限公司 | Chip unlocking and power supply system |
| CN115664184B (en) * | 2022-12-23 | 2023-04-07 | 上海芯浦科技有限公司 | Chip unlocking and power supply system |
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