CN110289598B - Comprehensive protection device and method applied to full-bridge inverter circuit - Google Patents
Comprehensive protection device and method applied to full-bridge inverter circuit Download PDFInfo
- Publication number
- CN110289598B CN110289598B CN201910568180.6A CN201910568180A CN110289598B CN 110289598 B CN110289598 B CN 110289598B CN 201910568180 A CN201910568180 A CN 201910568180A CN 110289598 B CN110289598 B CN 110289598B
- Authority
- CN
- China
- Prior art keywords
- unit
- input
- module
- output end
- fault
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a comprehensive protection device and a method applied to a full-bridge inverter circuit, wherein the device comprises a full-bridge inverter unit, a driving unit, a fault latch unit, a comprehensive protection unit, a controllable level conversion unit and a comparison unit; the driving unit is used for sending a driving unit electric signal to the comprehensive protection unit according to the fault type; the fault latch unit is used for automatically recording and manually clearing fault information; the comprehensive protection unit is used for sending a protection unit electric signal to the controllable level conversion unit and the fault latch unit; the controllable level conversion unit is used for switching on or off the input end of the controllable level conversion unit; the comparison unit is used for comparing the voltage of the full-bridge inversion unit with a reference source voltage; the device solves the problems that the fault type is single, the fault cannot be recorded in a refined mode in real time and the like in the prior art, and achieves the purposes of rapidly removing various faults, classifying the faults in a refined mode and recording the faults in real time.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a comprehensive protection device and method applied to a full-bridge inverter circuit.
Background
With the rapid development of industry, the important function of electric energy sources in various industry fields is particularly prominent. The full-bridge inverter circuit is one of important means for converting an alternating current power supply into a direct current power supply, and plays a central role in electronic power equipment such as a direct current power supply, a frequency converter, a UPS (uninterrupted power supply), an induction heating power supply and the like.
In the application of the full-bridge inverter circuit, one or more faults such as direct connection of upper and lower bridge arms, software and hardware problems of IGBT desaturation and the like exist. Because the same fault may be caused by different reasons, the prior art can remove a certain type of fault, but can not remove other faults and can not finely classify the faults. When the application occasion is special, the external environment is harsh, the requirement on the reliability of the circuit is high, or the fault reason needs to be quickly searched in real time, the prior art cannot meet the requirement. Therefore, a comprehensive protection device is needed to rapidly relieve various faults, finely classify the faults and record the faults.
Disclosure of Invention
In order to solve the problems that multiple faults in a full-bridge inverter circuit cannot be simultaneously relieved and the faults cannot be finely classified in the prior art, the invention provides a comprehensive protection device applied to the full-bridge inverter circuit, which comprises:
the input end of the full-bridge inversion unit is connected with the output end of the driving unit, and the output end of the full-bridge inversion unit is connected with the input end of the comparison unit; the full-bridge inversion unit is used for receiving the driving unit electric signal sent by the driving unit and inverting the direct current into alternating current according to the driving unit electric signal;
the input end of the driving unit is connected with the controllable level conversion unit, and the output end of the driving unit is respectively connected with the full-bridge inversion unit and the comprehensive protection unit; the driving unit is used for receiving the conversion unit electric signal sent by the controllable level conversion unit and sending the conversion unit electric signal to the full-bridge inversion unit; the driving unit is used for sending a driving unit electric signal to the comprehensive protection unit according to the fault type;
the input end of the fault latch unit is connected with the comprehensive protection unit; the fault latch unit is used for automatically recording and manually clearing fault information according to the protection unit electric signal sent by the comprehensive protection unit;
the input end of the comprehensive protection unit is respectively connected with the output end of the controllable level conversion unit, the output end of the driving unit and the output end of the comparison unit; the output end of the comprehensive protection unit is respectively connected with the enabling end of the controllable level conversion unit and the input end of the fault latch unit; the comprehensive protection unit is used for receiving the conversion unit electric signal sent by the controllable level conversion unit, the driving unit electric signal sent by the driving unit and the comparison unit electric signal sent by the comparison unit, and sending the corresponding protection unit electric signal to the controllable level conversion unit and the fault latch unit according to the conversion unit electric signal, the driving unit electric signal and the comparison unit;
the output end of the controllable level conversion unit is respectively connected with the input end of the driving unit and the input end of the comprehensive protection unit, and the enabling end of the controllable level conversion unit is connected with the output end of the comprehensive protection unit; the controllable level conversion unit is used for converting the voltage amplitude of the input end and sending the converted conversion unit electric signal to the input end of the driving unit and the input end of the comprehensive protection unit; the controllable level switching unit is used for receiving the protection unit electric signal sent by the comprehensive protection unit and controlling the input end of the controllable level switching unit to be switched on or switched off according to the protection unit electric signal;
the input end of the comparison unit is connected with the full-bridge inversion unit, and the output end of the comparison unit is connected with the comprehensive protection unit; the comparison unit is used for comparing the voltage of the full-bridge inversion unit with the reference source voltage and sending a comparison unit electric signal to the comprehensive protection unit according to a comparison result.
Further, the full-bridge inverter unit includes:
the bridge arm module comprises a first bridge arm module, a second bridge arm module and a third bridge arm module, wherein the first bridge arm module comprises a first switching tube and a second switching tube; the first switch tube and the second switch tube are connected and are respectively connected with the output end of the driving unit; the first switching tube and the second switching tube are used for receiving the driving unit electric signal sent by the driving unit and inverting the direct current into alternating current according to the driving unit electric signal;
the second bridge arm module comprises a third switching tube and a fourth switching tube; the third switching tube and the fourth switching tube are connected and are respectively connected with the output end of the driving unit; the third switch tube and the fourth switch tube are used for receiving the driving unit electric signal sent by the driving unit and inverting the direct current into alternating current according to the driving unit electric signal.
Further, the full-bridge inverter unit further includes:
the load module is connected between the common connection end of the first switching tube and the second switching tube and the common connection end of the third switching tube and the fourth switching tube; the load module is used for protecting the full-bridge inversion unit.
Further, the driving unit includes:
the output end of the first signal driving module is connected with the first switching tube; the first signal driving module is used for sending a driving unit signal to the first switching tube;
the output end of the second signal driving module is connected with the second switching tube; the second signal driving module is used for sending a driving unit signal to the second switching tube;
the output end of the third signal driving module is connected with the third switching tube; the third signal driving module is used for sending a driving unit signal to the third switching tube;
the output end of the fourth signal driving module is connected with the fourth switching tube; the fourth signal driving module is used for sending a driving unit signal to the fourth switching tube;
the first, second, third and fourth signal driving modules comprise an RDY pin and an FLT pin; the RDY pin is used for sending a corresponding driving unit signal to the comprehensive protection unit according to the internal working condition of the driving chip; and the FLT pin is used for sending a corresponding driving unit signal to the comprehensive protection unit according to the desaturation condition of the IGBT switching tube.
Further, the fail latch unit includes:
the input end of the first NOR gate module is respectively connected with the output end of the comprehensive protection unit and the output end of the second NOR gate module, and the output end of the first NOR gate module is respectively connected with the input end of the second NOR gate module and the input end of the latch module; the first NOR gate module is used for sending a first NOR gate electrical signal to the latch module according to the protection unit electrical signal sent by the comprehensive protection unit and a second NOR gate electrical signal sent by the second NOR gate module;
the input end of the second NOR gate module is respectively connected with the output end of the first NOR gate module and the output end of the reset circuit module; the output end of the second NOR gate module is connected with the input end of the first NOR gate module; the second nor gate module is used for sending a second nor gate electric signal to the first nor gate module according to the first nor gate electric signal sent by the first nor gate module and the reset electric signal sent by the reset circuit module;
the input end of the latch module is respectively connected with the output end of the first NOR gate module and the comprehensive protection unit; the latch module is used for automatically recording and manually clearing fault information according to a first NOR gate electric signal and a protection unit electric signal sent by the first NOR gate module;
the output end of the reset circuit module is connected with the input end of the second NOR gate module; the reset circuit module is used for sending a reset electric signal to the second NOR gate module.
Further, the integrated protection unit includes:
the input end of the first two-input AND gate module is connected with the controllable level unit, and the output end of the first two-input AND gate module is connected with the two-input OR gate module;
the input end of the second two-input AND gate module is connected with the controllable level unit, and the output end of the second two-input AND gate module is connected with the two-input OR gate module
The input end of the first four-input OR gate module is connected with the driving unit; the output end of the first four-input OR gate module is respectively connected with the input end of the four-input OR gate module and the input end of the fault latch unit;
the input end of the second four-input OR gate module is connected with the driving unit; the output end of the second four-input OR gate module is respectively connected with the input end of the four-input OR gate module and the input end of the fault latch unit;
the input ends of the two input or gate modules are respectively connected with the output ends of the first two input and gate module and the output end of the second two input and gate module; the output end of the two-input OR gate module is connected with the four-input NOR gate module;
a four-input nor module, an input end of which is respectively connected with an output end of the first four-input or gate module, an output end of the second four-input or gate module, an output end of the two-input or gate module and an output end of the comparison unit; and the output end of the four-input NOR gate module is respectively connected with the enabling end of the controllable level conversion unit and the input end of the fault latch unit.
Further, the comparison unit includes:
a voltage reference source, a current sensor and an operational amplifier; the output ends of the voltage reference source and the current sensor are respectively connected with the operational amplifier; the current sensor is used for detecting the current of the direct current loop and converting a current signal into a voltage signal; the operational amplifier is used for comparing the voltage reference source with the voltage signal and outputting a comparison unit electric signal according to a comparison result.
Further, the current sensor includes a hall current sensor.
Further, the fault information includes: one or more of drive board hardware fault information, drive chip fault information, overload fault information, and software fault information.
The protection method applied to any one of the comprehensive protection devices comprises the following steps:
receiving a fault electric signal sent out due to the occurrence of a fault;
sending a disconnection signal to disconnect the voltage signal input;
and automatically recording and manually clearing fault information according to the fault electric signal.
Further, the receiving the fault electrical signal generated by the fault comprises:
receiving a hardware fault electrical signal generated due to a hardware fault;
receiving a driving chip fault electric signal generated by a driving chip fault;
receiving an overload fault electrical signal generated by an overload fault;
a software fault electrical signal generated by a software fault is received.
Further, the fault information includes: one or more of driver board hardware fault information, driver chip fault information, overload fault information, and software fault information.
The invention has the beneficial effects that: the technical scheme of the invention provides a comprehensive protection device and a comprehensive protection method applied to a full-bridge inverter circuit, wherein the device comprises a full-bridge inverter unit, a driving unit, a fault latch unit, a comprehensive protection unit, a controllable level conversion unit and a comparison unit; the driving unit is used for sending a driving unit electric signal to the comprehensive protection unit according to the fault type; the fault latch unit is used for automatically recording and manually clearing fault information; the comprehensive protection unit is used for sending the protection unit electric signal to the controllable level conversion unit and the fault latch unit; the controllable level conversion unit is used for switching on or off the input end of the controllable level conversion unit; the device solves the problems that the fault type is single, the fault cannot be recorded in a refined mode in real time and the like in the prior art, and achieves the purposes of rapidly removing various faults, classifying the faults in a refined mode and recording the faults in real time.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a structural diagram of an integrated protection device applied to a full-bridge inverter circuit according to an embodiment of the present invention;
FIG. 2 is a block diagram of a comparison circuit unit according to an embodiment of the present invention;
FIG. 3 is a block diagram of a fail latch unit according to an embodiment of the present invention;
fig. 4 is a flowchart of a comprehensive protection method applied to a full-bridge inverter circuit according to the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a structural diagram of an integrated protection device applied to a full-bridge inverter circuit according to an embodiment of the present invention. Fig. 2 is a block diagram of a comparison circuit unit according to an embodiment of the present invention. Fig. 3 is a structural diagram of a fail latch unit according to an embodiment of the present invention. As shown in fig. 1, 2 and 3, the apparatus includes:
the input end of the full-bridge inversion unit 1 is connected with the output end of the driving unit 2, and the output end of the full-bridge inversion unit 1 is connected with the input end of the comparison unit 6; the full-bridge inversion unit 1 is used for receiving the driving unit electrical signal sent by the driving unit 2 and inverting the direct current into alternating current according to the driving unit electrical signal;
further, the full-bridge inverter unit 1 includes:
the bridge arm module comprises a first switch tube 11 and a second switch tube 12; the first switch tube 11 and the second switch tube 12 are connected and are respectively connected with the output end of the driving unit 2; the first switch tube 11 and the second switch tube 12 are used for receiving the driving unit electrical signal sent by the driving unit 2 and inverting the direct current into alternating current according to the driving unit electrical signal;
the second bridge arm module comprises a third switching tube 13 and a fourth switching tube 14; the third switch tube 13 and the fourth switch tube 14 are connected and are respectively connected with the output end of the driving unit 2; the third switching tube 13 and the fourth switching tube 14 are configured to receive the driving unit electrical signal sent by the driving unit 2, and invert the direct current into an alternating current according to the driving unit electrical signal.
Further, the full-bridge inverter unit 1 further includes:
the load module 15 is connected between the common connection end of the first switching tube 11 and the second switching tube 12 and the common connection end of the third switching tube 13 and the fourth switching tube 14; the load module 15 is used for protecting the full-bridge inverter unit 1.
The input end of the driving unit 2 is connected with the controllable level conversion unit 5, and the output end of the driving unit 2 is respectively connected with the full-bridge inversion unit 1 and the comprehensive protection unit 4; the driving unit 1 is configured to receive the conversion unit electrical signal sent by the controllable level conversion unit 5, and send the conversion unit electrical signal to the full-bridge inversion unit 1; the driving unit 2 is used for sending a driving unit electric signal to the comprehensive protection unit 4 according to the fault type;
further, the driving unit 2 includes:
the output end of the first signal driving module is connected with the first switching tube 11; the first signal driving module is used for sending a driving unit signal to the first switching tube 11;
the output end of the second signal driving module is connected with the second switching tube 12; the second signal driving module is configured to send a driving unit signal to the second switching tube 12;
the output end of the third signal driving module is connected with the third switching tube 13; the third signal driving module is used for sending a driving unit signal to the third switching tube 13;
the output end of the fourth signal driving module is connected with the fourth switching tube 14; the fourth signal driving module is used for sending a driving unit signal to the fourth switching tube 14;
the first, second, third and fourth signal driving modules comprise an RDY pin and an FLT pin; the RDY pin is used for sending a corresponding driving unit signal to the comprehensive protection unit according to the internal working condition of the driving chip; the FLT pin is used for sending a corresponding driving unit signal to the comprehensive protection unit according to the desaturation condition of the IGBT switching tube;
in this example, when the driver chip normally works inside, the RDY pin will output a low level; when the IGBT switching tube has desaturation fault, the FLT pin outputs high level.
The input end of the fault latch unit 3 is connected with the comprehensive protection unit 4; the fault latch unit 3 is used for automatically recording and manually clearing fault information according to the protection unit electric signal sent by the comprehensive protection unit 4;
further, the fail latch unit 3 includes:
a first nor module 31, wherein an input end of the first nor module 31 is respectively connected to an output end of the integrated protection unit 3 and an output end of the second nor module 32, and an output end of the first nor module 31 is respectively connected to an input end of the second nor module 32 and an input end of the latch module 33; the first nor gate module 31 is configured to send a first nor gate electrical signal to the latch module 33 according to the protection unit electrical signal sent by the comprehensive protection unit 4 and the second nor gate electrical signal sent by the second nor gate module 32;
a second nor gate module 32, wherein an input end of the second nor gate module 32 is respectively connected with an output end of the first nor gate module 31 and an output end of the reset circuit module 34; the second nor module output 32 is connected to the input of the first nor module 31; the second nor gate module 32 is configured to send a second nor gate signal to the first nor gate module 31 according to the first nor gate signal sent by the first nor gate module 31 and the reset signal sent by the reset circuit module 34;
a latch module 33, wherein an input end of the latch module 33 is respectively connected with an output end of the first nor module 31 and the comprehensive protection unit 4; the latch module 33 is configured to automatically record and manually clear fault information according to the first nor gate electrical signal and the protection unit electrical signal sent by the first nor gate module 31; in this example, the latch is an eight-way transparent D-type latch with three-state output;
the output end of the reset circuit module 34 is connected with the input end of the second nor gate module 32; the reset circuit module 34 is configured to send a reset electrical signal to the second nor gate module 32.
In this example, during normal operation, the input ERROR pin is at low level, the output of the second two-input nor gate module 32 is at low level, the output of the first two-input nor gate module 31 is at high level, the LE pin is at high level, and the output Q follows the input D; when a fault occurs, the input ERROR pin is at a high level, the output of the first two-input nor gate module 31 is at a low level, the output of the second two-input nor gate module 32 is at a high level, the LE pin is at a low level, and the output Q latches the input D at the moment after the fault occurs; at this time, the level of the reset terminal is pulled high, if the fault disappears, the input ERROR pin is a low level, so the output of the second two-input nor gate module is a low level, the output of the first two-input nor gate module 31 is a high level, the LE pin is a high level, the output Q follows the input D, and the fault is relieved; in conclusion, the fault latch circuit has the functions of automatically recording and manually clearing fault information.
The input end of the comprehensive protection unit 4 is respectively connected with the output end of the controllable level conversion unit 5, the output end of the driving unit 2 and the output end of the comparison unit 6; the output end of the comprehensive protection unit 4 is respectively connected with the enabling end of the controllable level conversion unit 5 and the input end of the fault latch unit 3; the comprehensive protection unit 4 is configured to receive the conversion unit electrical signal sent by the controllable level conversion unit 5, the driving unit electrical signal sent by the driving unit 2, and the comparison unit electrical signal sent by the comparison unit 6, and send a corresponding protection unit electrical signal to the controllable level conversion unit 5 and the fault latch unit 3 according to the conversion unit electrical signal, the driving unit electrical signal, and the comparison unit;
further, the comprehensive protection unit 4 includes:
the input end of the first two-input and gate module 44 is connected with the controllable level unit 5, and the output end of the first two-input and gate module 44 is connected with the two-input or gate module 43;
a second two-input and gate module 45, wherein an input end of the second two-input and gate module 45 is connected with the controllable level unit 5, and an output end of the second two-input and gate module 45 is connected with the two-input or gate module 43;
a first four-input or gate module 41, an input end of the first four-input or gate module 41 is connected with the FLT pin of the driving unit 2; the output end of the first four-input or gate module 41 is respectively connected with the input end of a four-input nor gate module 46 and the input end of the fault latch unit 3;
a second four-input or gate module 42, an input end of the second four-input or gate module 42 is connected with an RDY pin of the driving unit 2; the output end of the second four-input or gate module 42 is respectively connected with the input end of the four-input nor gate module 46 and the input end of the fault latch unit 3;
the input ends of the two input or gate modules 43 are respectively connected with the output ends of the first two input and gate module 44 and the output end of the second two input and gate module 45; the output end of the two-input or gate module 43 is connected with the four-input nor gate module 46;
a four-input nor module 46, wherein an input end of the four-input nor module 46 is respectively connected to an output end of the first four-input or module 41, an output end of the second four-input or module 42, an output end of the two-input or module 43, and an output end of the comparing unit 6; the output end of the four-input nor gate module 46 is respectively connected with the enable end of the controllable level converting unit 5 and the input end of the fault latch unit 3;
in this example, the integrated protection unit divides the failure into four types, namely a drive board hardware failure, a drive chip failure, an overload failure and a software failure.
The output end of the controllable level conversion unit 5 is respectively connected with the input end of the driving unit 2 and the input end of the comprehensive protection unit 4, and the enable end of the controllable level conversion unit 5 is connected with the output end of the comprehensive protection unit 4; the controllable level conversion unit 5 is used for converting an input end voltage amplitude value and sending a converted conversion unit electric signal to the input end of the driving unit 2 and the input end of the comprehensive protection unit 4; the controllable level switching unit 5 is configured to receive the protection unit electrical signal sent by the comprehensive protection unit 4, and control an input end of the controllable level switching unit 5 to be switched on or off according to the protection unit electrical signal;
in this example, the controllable level shift unit 5 has a level shift function, converts an input 3.3V PWM wave signal into 5V, and inputs the voltage-converted PWM signal to the driving unit 2 and the integrated protection unit 4.
The input end of the comparison unit 6 is connected with the full-bridge inversion unit 1, and the output end of the comparison unit 6 is connected with the comprehensive protection unit 4; the comparison unit 6 is used for comparing the voltage of the full-bridge inverter unit 1 with a reference source voltage and sending a comparison unit electric signal to the comprehensive protection unit 4 according to a comparison result;
further, the comparing unit 6 includes:
a voltage reference source 61, a current sensor 62, and an operational amplifier 63; the output ends of the voltage reference source 61 and the current sensor 62 are respectively connected with the operational amplifier 63; the current sensor 62 is configured to detect a dc loop current and convert a current signal into a voltage signal; the operational amplifier 63 is used for comparing the voltage reference source 61 with the voltage signal and outputting a comparison unit electric signal according to a comparison result;
further, the current sensor 62 includes a hall current sensor;
further, the fault information includes: one or more of drive board hardware fault information, drive chip fault information, overload fault information, and software fault information.
Fig. 4 is a flowchart of a protection method applied to any one of the integrated protection devices according to the present invention. As shown in fig. 4, the method includes:
Claims (12)
1. An integrated protection device applied to a full-bridge inverter circuit, the integrated protection device is characterized by comprising:
the input end of the full-bridge inversion unit is connected with the output end of the driving unit, and the output end of the full-bridge inversion unit is connected with the input end of the comparison unit; the full-bridge inversion unit is used for receiving the driving unit electric signal sent by the driving unit and inverting the direct current into alternating current according to the driving unit electric signal;
the input end of the driving unit is connected with the controllable level conversion unit, and the output end of the driving unit is respectively connected with the full-bridge inversion unit and the comprehensive protection unit; the driving unit is used for receiving the conversion unit electric signal sent by the controllable level conversion unit and sending the conversion unit electric signal to the full-bridge inversion unit; the driving unit is used for sending a driving unit electric signal to the comprehensive protection unit according to the fault type;
the input end of the fault latch unit is connected with the comprehensive protection unit; the fault latch unit is used for automatically recording and manually clearing fault information according to the protection unit electric signal sent by the comprehensive protection unit;
the input end of the comprehensive protection unit is respectively connected with the output end of the controllable level conversion unit, the output end of the driving unit and the output end of the comparison unit; the output end of the comprehensive protection unit is respectively connected with the enabling end of the controllable level conversion unit and the input end of the fault latch unit; the comprehensive protection unit is used for receiving the conversion unit electric signal sent by the controllable level conversion unit, the driving unit electric signal sent by the driving unit and the comparison unit electric signal sent by the comparison unit, and sending the corresponding protection unit electric signal to the controllable level conversion unit and the fault latch unit according to the conversion unit electric signal, the driving unit electric signal and the comparison unit;
the output end of the controllable level conversion unit is respectively connected with the input end of the driving unit and the input end of the comprehensive protection unit, and the enabling end of the controllable level conversion unit is connected with the output end of the comprehensive protection unit; the controllable level conversion unit is used for converting the voltage amplitude of the input end and sending the converted conversion unit electric signal to the input end of the driving unit and the input end of the comprehensive protection unit; the controllable level switching unit is used for receiving the protection unit electric signal sent by the comprehensive protection unit and controlling the input end of the controllable level switching unit to be switched on or switched off according to the protection unit electric signal;
the input end of the comparison unit is connected with the full-bridge inversion unit, and the output end of the comparison unit is connected with the comprehensive protection unit; the comparison unit is used for comparing the voltage of the full-bridge inversion unit with the reference source voltage and sending a comparison unit electric signal to the comprehensive protection unit according to a comparison result.
2. The apparatus of claim 1, wherein the full-bridge inverting unit comprises:
the bridge arm module comprises a first switch tube and a second switch tube;
the first switch tube and the second switch tube are connected and are respectively connected with the output end of the driving unit; the first switching tube and the second switching tube are used for receiving the driving unit electric signal sent by the driving unit and inverting the direct current into alternating current according to the driving unit electric signal;
the second bridge arm module comprises a third switching tube and a fourth switching tube; the third switching tube and the fourth switching tube are connected and are respectively connected with the output end of the driving unit; the third switch tube and the fourth switch tube are used for receiving the driving unit electric signal sent by the driving unit and inverting the direct current into alternating current according to the driving unit electric signal.
3. The apparatus of claim 2, wherein the full-bridge inverter unit further comprises:
the load module is connected between the common connecting end of the first switching tube and the second switching tube and the common connecting end of the third switching tube and the fourth switching tube; the load module is used for protecting the full-bridge inversion unit.
4. The apparatus of claim 2, wherein the drive unit comprises:
the output end of the first signal driving module is connected with the first switching tube; the first signal driving module is used for sending a driving unit signal to the first switching tube;
the output end of the second signal driving module is connected with the second switching tube; the second signal driving module is used for sending a driving unit signal to the second switching tube;
the output end of the third signal driving module is connected with the third switching tube; the third signal driving module is used for sending a driving unit signal to the third switching tube;
the output end of the fourth signal driving module is connected with the fourth switching tube; the fourth signal driving module is used for sending a driving unit signal to the fourth switching tube;
the first, second, third and fourth signal driving modules comprise an RDY pin and an FLT pin; the RDY pin is used for sending a corresponding driving unit signal to the comprehensive protection unit according to the internal working condition of the driving chip; the FLT pin is used for sending a corresponding driving unit signal to the comprehensive protection unit according to the desaturation condition of the IGBT switch tube.
5. The apparatus according to claim 1, wherein the fail latch unit comprises:
the input end of the first NOR gate module is respectively connected with the output end of the comprehensive protection unit and the output end of the second NOR gate module, and the output end of the first NOR gate module is respectively connected with the input end of the second NOR gate module and the input end of the latch module; the first NOR gate module is used for sending a first NOR gate electrical signal to the latch module according to the protection unit electrical signal sent by the comprehensive protection unit and a second NOR gate electrical signal sent by the second NOR gate module;
the input end of the second NOR gate module is respectively connected with the output end of the first NOR gate module and the output end of the reset circuit module; the output end of the second NOR gate module is connected with the input end of the first NOR gate module; the second nor gate module is used for sending a second nor gate electric signal to the first nor gate module according to the first nor gate electric signal sent by the first nor gate module and the reset electric signal sent by the reset circuit module;
the input end of the latch module is respectively connected with the output end of the first NOR gate module and the comprehensive protection unit; the latch module is used for automatically recording and manually clearing fault information according to a first NOR gate electric signal and a protection unit electric signal sent by the first NOR gate module;
the output end of the reset circuit module is connected with the input end of the second NOR gate module; the reset circuit module is used for sending a reset electric signal to the second NOR gate module.
6. The apparatus of claim 2, wherein the integrated protection unit comprises:
the input end of the first two-input AND gate module is connected with the controllable level unit, and the output end of the first two-input AND gate module is connected with the two-input OR gate module;
the input end of the second two-input AND gate module is connected with the controllable level unit, and the output end of the second two-input AND gate module is connected with the two-input OR gate module;
the input end of the first four-input OR gate module is connected with the driving unit; the output end of the first four-input OR gate module is respectively connected with the input end of the four-input OR gate module and the input end of the fault latch unit;
the input end of the second four-input OR gate module is connected with the driving unit; the output end of the second four-input OR gate module is respectively connected with the input end of the four-input OR gate module and the input end of the fault latch unit;
the input ends of the two input OR gate modules are respectively connected with the output ends of the first two input AND gate module and the output end of the second two input AND gate module; the output end of the two-input OR gate module is connected with the four-input NOR gate module;
a four-input nor module, an input end of which is respectively connected with an output end of the first four-input or gate module, an output end of the second four-input or gate module, an output end of the two-input or gate module and an output end of the comparison unit; and the output end of the four-input NOR gate module is respectively connected with the enabling end of the controllable level conversion unit and the input end of the fault latch unit.
7. The apparatus of claim 1, wherein the comparison unit comprises:
a voltage reference source, a current sensor and an operational amplifier; the output ends of the voltage reference source and the current sensor are respectively connected with the operational amplifier; the current sensor is used for detecting the current of the direct current loop and converting a current signal into a voltage signal; the operational amplifier is used for comparing the voltage reference source with the voltage signal and outputting a comparison unit electric signal according to a comparison result.
8. The apparatus of claim 7, wherein the current sensor comprises a hall current sensor.
9. The apparatus of claim 1, wherein the fault information comprises: one or more of drive board hardware fault information, drive chip fault information, overload fault information, and software fault information.
10. A protection method applied to an integrated protection device according to any one of claims 1 to 9, characterized in that the method comprises:
receiving a fault electric signal sent out due to the occurrence of a fault;
sending a disconnection signal to disconnect the voltage signal input;
and automatically recording and manually clearing fault information according to the fault electric signal.
11. The method of claim 10, wherein receiving a fault electrical signal due to a fault comprises:
receiving a hardware fault electrical signal generated due to a hardware fault;
receiving a driving chip fault electric signal generated by a driving chip fault;
receiving an overload fault electrical signal generated by an overload fault;
a software fault electrical signal generated by a software fault is received.
12. The method of claim 10, wherein the fault information comprises:
one or more of drive board hardware fault information, drive chip fault information, overload fault information, and software fault information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910568180.6A CN110289598B (en) | 2019-06-27 | 2019-06-27 | Comprehensive protection device and method applied to full-bridge inverter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910568180.6A CN110289598B (en) | 2019-06-27 | 2019-06-27 | Comprehensive protection device and method applied to full-bridge inverter circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110289598A CN110289598A (en) | 2019-09-27 |
| CN110289598B true CN110289598B (en) | 2022-09-20 |
Family
ID=68019920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910568180.6A Active CN110289598B (en) | 2019-06-27 | 2019-06-27 | Comprehensive protection device and method applied to full-bridge inverter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110289598B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100689328B1 (en) * | 2005-12-02 | 2007-03-08 | 엘에스산전 주식회사 | Protection apparatus for inverter |
| CN102377326A (en) * | 2010-08-20 | 2012-03-14 | 深圳市澳地特电气技术有限公司 | Insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and protection module thereof |
| CN203933437U (en) * | 2014-07-15 | 2014-11-05 | 湖南大学 | A kind of universal bridge-type inverter control circuit board based on two DSP |
| CN204012661U (en) * | 2014-05-28 | 2014-12-10 | 浙江西子富沃德电机有限公司 | A kind of motor driving protection circuit |
| CN104348142A (en) * | 2013-08-08 | 2015-02-11 | 上海诺奉新能源技术有限公司 | Power tube over-current protecting circuit |
| CN105391310A (en) * | 2015-12-19 | 2016-03-09 | 蒋小春 | Intelligent power unit for high-power converter device and control method |
| CN106921308A (en) * | 2015-12-24 | 2017-07-04 | 哈尔滨善道信息技术有限公司 | A kind of Novel Three-phase Inverter and control method |
-
2019
- 2019-06-27 CN CN201910568180.6A patent/CN110289598B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100689328B1 (en) * | 2005-12-02 | 2007-03-08 | 엘에스산전 주식회사 | Protection apparatus for inverter |
| CN102377326A (en) * | 2010-08-20 | 2012-03-14 | 深圳市澳地特电气技术有限公司 | Insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and protection module thereof |
| CN104348142A (en) * | 2013-08-08 | 2015-02-11 | 上海诺奉新能源技术有限公司 | Power tube over-current protecting circuit |
| CN204012661U (en) * | 2014-05-28 | 2014-12-10 | 浙江西子富沃德电机有限公司 | A kind of motor driving protection circuit |
| CN203933437U (en) * | 2014-07-15 | 2014-11-05 | 湖南大学 | A kind of universal bridge-type inverter control circuit board based on two DSP |
| CN105391310A (en) * | 2015-12-19 | 2016-03-09 | 蒋小春 | Intelligent power unit for high-power converter device and control method |
| CN106921308A (en) * | 2015-12-24 | 2017-07-04 | 哈尔滨善道信息技术有限公司 | A kind of Novel Three-phase Inverter and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110289598A (en) | 2019-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200350903A1 (en) | Igbt drive circuit for motor controller, and motor controller | |
| US9748831B2 (en) | Power conversion device and method for transmitting protection signal using the same | |
| CN107316598B (en) | Hot-plug short circuit control device and method | |
| CN102377326B (en) | Insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and protection module thereof | |
| CN103797714A (en) | Gate control circuit, power module and associated method | |
| US9772675B2 (en) | Power supply system of electronic device | |
| JP5064762B2 (en) | Discharge lamp drive unit | |
| CN217954698U (en) | Broken wire detection circuit | |
| CN110289598B (en) | Comprehensive protection device and method applied to full-bridge inverter circuit | |
| CN113364249A (en) | Protection device and method for IGBT (insulated gate bipolar transistor) driving board and frequency converter | |
| WO2015176523A1 (en) | Drive signal wave loss detection circuit and switching tube drive circuit | |
| CN110412341B (en) | IPM over-current detection circuit | |
| US7755432B1 (en) | Short circuit protection circuits and methods | |
| CN111404423A (en) | Safe torque turn-off control method and circuit and motor controller | |
| JP2012080156A (en) | Signal transmission circuit, switching element drive circuit and power conversion apparatus | |
| CN108137070B (en) | Contact input control device | |
| CN209673929U (en) | A kind of IGBT short-circuit detecting circuit | |
| CN110690883A (en) | EC reset circuit and electronic equipment based on composite signal | |
| TWI818657B (en) | Power circuit and electronic device having the same | |
| US10069401B2 (en) | Protection circuit | |
| CN210518243U (en) | EC reset circuit and electronic equipment based on composite signal | |
| CN111879987B (en) | High-voltage-resistant isolated contact detection circuit | |
| CN116723606B (en) | Breakpoint continuous transmission module based on serial system | |
| CN113839653B (en) | SiC MOSFET driving circuit based on overcurrent protection of pure hardware device | |
| CN104160602A (en) | Method for remote control of a power converter module and a device therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |