阅读说明：本技术 Ipm模块过流保护自动重启方法 (Automatic restarting method for IPM module overcurrent protection ) 是由 迟恒 宋毅龙 邢秀平 于 2019-09-25 设计创作，主要内容包括：本发明涉及IPM模块过流保护自动重启方法,步骤一,首先,故障信号CO经过施密特触发器G1反向运算,其高电位正常导通分频器U1,同时,方波信号PWM信号导入分频器U1；然后,通过分频器U1设置检测时间间隔,并产生周期为方波信号PWM信号整数倍的成倍方波信号,该成倍方波分三路；其次,第一路通过触发器C2-C3与时延电容C1生成窄宽度脉冲方波；再次,通过异或门G5,实现对窄宽度脉冲方波与第二路成倍方波信号进行双脉冲处理；紧接着,与门G6将双脉冲处理后信号与第三路成倍方波信号进行处理生成周期性单脉冲；本发明设计合理、结构紧凑且使用方便。(The invention relates to an IPM module overcurrent protection automatic restarting method, which comprises the following steps that firstly, a fault signal CO is reversely operated through a Schmidt trigger G1, a high potential of the fault signal CO normally conducts a frequency divider U1, and meanwhile, a square wave signal PWM signal is led into the frequency divider U1; then, setting a detection time interval through a frequency divider U1, and generating a multiplied square wave signal with the period being integral multiple of the PWM signal of the square wave signal, wherein the multiplied square wave is divided into three paths; secondly, the first path generates a narrow-width pulse square wave through a trigger C2-C3 and a time delay capacitor C1; thirdly, double pulse processing is carried out on the narrow-width pulse square wave and the second path of multiplied square wave signal through an exclusive-or gate G5; next, the and gate G6 processes the double-pulse processed signal and the third multiplied square wave signal to generate a periodic single pulse; the invention has reasonable design, compact structure and convenient use.)

1. an IPM module over-current protection automatic restart method is characterized in that by means of the IPM module over-current protection automatic restart method comprising an electric control device (2), the method comprises the steps of firstly, overlapping the electric control device (2); then, the following steps are performed;

Firstly, a fault signal CO is subjected to reverse operation through a Schmidt trigger G1, a high potential of the fault signal CO normally conducts a frequency divider U1, and meanwhile, a square wave signal PWM signal is led into the frequency divider U1; then, setting a detection time interval through a frequency divider U1, and generating a multiplied square wave signal with the period being integral multiple of the PWM signal of the square wave signal, wherein the multiplied square wave is divided into three paths; secondly, the first path generates a narrow-width pulse square wave through a trigger C2-C3 and a time delay capacitor C1; thirdly, double pulse processing is carried out on the narrow-width pulse square wave and the second path of multiplied square wave signal through an exclusive-or gate G5; next, the and gate G6 processes the double-pulse processed signal and the third multiplied square wave signal to generate a periodic single pulse;

step two, performing double control processing on the circuit through an AND gate G7 and a frequency divider U1, when the circuit is restarted, a signal closes a logic gate and a trigger to enable a driving device not to be interfered, an input end VCC conducts a driving chip G8 through a pull-up capacitor C2, and the driving chip G8 is isolated through an isolation diode D2; when the AND gate G7 is conducted with the frequency divider U1, step three is executed;

And step three, the AND gate G7 starts the driving device driving chip G8 to restart, the isolation of the input end VCC is realized through the isolation diode D1, and the IPM module is restarted.

2. the IPM module over-current protection automatic restart method of claim 1, wherein if the IPM module over-current condition is eliminated, the second step is executed, the IPM module will work normally;

And if the overcurrent condition is not eliminated, continuously and periodically detecting and executing the step three.

3. The IPM module over-current protection automatic restart method of claim 1, wherein the electric control device (2) comprises a square wave signal PWM, a fault signal CO, an input VCC, Schmidt triggers G1, G2, G3, G4, a frequency divider U1, a grounding capacitor C1, an exclusive-OR gate G5, AND gates G6, G7, a driving chip G8, the fault signal CO is connected with the input of the Schmidt trigger G1, and the output of the Schmidt trigger G1 and the square wave signal PWM are respectively connected with the frequency divider U1; the output of the frequency divider U1 is divided into three paths, the first path is connected with the input end of a Schmitt trigger G2, the output end of the Schmitt trigger G2 is grounded through a grounding capacitor C1 and is connected with one input end of an exclusive-OR gate G5 through the Schmitt trigger G3; the other input end of the second exclusive-or gate G5 is connected; the output end of the exclusive-or gate G5 is connected with one input end of the AND gate G6, and the third path is connected with the other input end of the AND gate G6; the output end of the AND gate G6 is connected with one input end of the AND gate G7; the output end of the Schmitt trigger G1 is also connected with the input end of a Schmitt trigger G4, and the output end of the Schmitt trigger G4 is connected with the other input end of the AND gate G7; the corresponding terminal pins of the driving chip G8 are respectively connected with a square wave signal PWM, an input terminal VCC, an output terminal of an AND gate G7 and an input terminal of a Schmidt trigger G4; the high-voltage power supply further comprises a pull-up capacitor C2, a grounding resistor R1, resistors R2 and R3, an output end Vout, isolation diodes D1-D3, capacitors C3-C5, resistors R5-R9, a voltage regulator tube Z1, an MOS tube Q1 and a regulating diode D4; the driving chip G8 is a driving piece of the driving device (6); the input end VCC is divided into two paths through a pull-up capacitor C2, one path is grounded through a grounding resistor R1, the other path is grounded through an isolation diode D1 and is connected with a corresponding pin of a driving chip G8, the output end of an AND gate G7 is connected with a corresponding pin of a driving chip G8 through an isolation diode D2, the input end VCC is respectively connected with a corresponding pin of a driving chip G8 through resistors R2 and R3, the input end VCC is directly connected with a corresponding pin of a driving chip G8, the input end VCC is grounded through a capacitor C4, the COM end of the driving chip G8 is connected with the input end VCC through a capacitor C3 and is grounded through a resistor R8, the COM end of the driving chip G8 is connected with the G end of an MOS tube Q5 through a capacitor C5, the input end VCC is converged through the output end of a resistor R9 and then is connected with the output end Vout through a resistor R4 and a diode D3, the output end of the driving chip G8 is connected with the G end of the MOS, a regulating diode D4 is connected between the S end and the D end of the MOS transistor Q1; the output end Vout is connected with the D end of the MOS transistor Q1.

4. The IPM module overcurrent protection automatic restart method of claim 1, wherein when the temperature is higher than a set threshold, the temperature controller starts the cooling component; the method comprises the following steps that firstly, a refrigerating sheet (3), a circulating pump body (5) and a fan (4) are driven; then, the refrigerating sheet (3) absorbs heat through thermal contact, and the radiator (8) absorbs the heat of the heat absorption side of the refrigerating sheet (3) through the radiator (8); finally, the heat is output to the radiator (8) and/or the circulation pump body (5) by the fan (4).

5. The IPM module over-current protection automatic restarting method according to claim 1, characterized by further comprising an IPM module over-current protection automatic restarting circuit device comprising a package case (1), a partition plate (7) arranged in the package case (1), an electric control device (2) and a driving device (6) respectively arranged at two sides of the partition plate (7), a cooling fin (3) arranged on the electric control device (2), a radiator (8) arranged at a heat radiation side of the cooling fin (3), a circulation pipeline (9) connected with the radiator (8), a circulation pump body (5) connected with the circulation pipeline (9), and a fan (4) arranged at one side of the radiator (8) and/or the circulation pump body (5); the electric control device (2) is electrically connected with the driving device (6).

Technical Field

The invention relates to an automatic restarting method for IPM module overcurrent protection, belongs to the technical field of power electronics, mainly belongs to the field of high-power control, and particularly relates to a method for automatically restarting a hardware circuit after overcurrent protection of an intelligent power circuit.

background

Future power modules in the power electronics industry are developing towards high voltage resistance, large on-state current, low conduction loss, integration and intellectualization at high speed. The IPM module is a power electronic development direction which has been developed rapidly in recent years. The IPM module is an intelligent power module, which not only integrates a power switch device and a driving circuit, but also integrates a fault detection circuit such as overvoltage, overcurrent, overheat and the like. When overcurrent faults occur, the interior of the IPM module can be processed, and overcurrent fault signals generated in the interior of the IPM can be sent to the MCU unit for processing in an outward sending mode and then sent to the IPM to form closed-loop control. When an overcurrent fault occurs, latching the circuit state is generally a safer method, especially for high-power IPM modules, but this method needs to restart the circuit to enable the IPM module to work again after the overcurrent fault disappears. Aiming at the internal and external processing of overcurrent fault signals of the IPM module, the restart circuit is divided into software control and hardware control. Software control usually handles IPM module overcurrent faults by sending out fault signals, which increases processing time and complexity of IPM peripheral circuits. Usually, the hardware control is to have a restart circuit inside the IPM module, which saves peripheral circuits of the IPM module and processing time. But hardware implementations of the restart circuitry have some difficulty in obtaining periodic nanosecond-level narrow pulses.

Disclosure of Invention

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the present invention.

1. a package housing; 2. an electric control device; 3. a refrigeration plate; 4. a fan; 5. a circulating pump body; 6. a drive device; 7. a partition plate; 8. a heat sink; 9. a circulation line.

Detailed Description

As shown in fig. 1-2, the IPM module overcurrent protection automatic restart circuit apparatus of this embodiment includes a package housing 1, a partition plate 7 disposed in the package housing 1, an electronic control device 2 and a driving device 6 respectively disposed at two sides of the partition plate 7, a cooling fin 3 disposed on the electronic control device 2, a heat sink 8 disposed at a heat dissipation side of the cooling fin 3, a circulation pipeline 9 connected to the heat sink 8, a circulation pump body 5 connected to the circulation pipeline 9, and a fan 4 disposed at one side of the heat sink 8 and/or the circulation pump body 5;

The electronic control device 2 is electrically connected to the drive device 6.

The drive means 6 comprise a motor, a controller or a switch.

the IPM module overcurrent protection automatic restart circuit apparatus of this embodiment includes an electronic control device 2, where the electronic control device 2 includes a square wave signal PWM, a fault signal CO, an input terminal VCC, schmidt triggers G1, G2, G3, G4, a frequency divider U1, a ground capacitor C1, an exclusive or gate G5, and gates G6, G7, a driving chip G8,

the fault signal CO is connected with the input end of a Schmitt trigger G1, and the output end of the Schmitt trigger G1 and the square wave signal PWM are respectively connected with a frequency divider U1;

the output of the frequency divider U1 is divided into three paths, the first path is connected with the input end of a Schmitt trigger G2, the output end of the Schmitt trigger G2 is grounded through a grounding capacitor C1 and is connected with one input end of an exclusive-OR gate G5 through the Schmitt trigger G3; the other input end of the second exclusive-or gate G5 is connected; the output end of the exclusive-or gate G5 is connected with one input end of the AND gate G6, and the third path is connected with the other input end of the AND gate G6; the output end of the AND gate G6 is connected with one input end of the AND gate G7;

the output end of the Schmitt trigger G1 is also connected with the input end of a Schmitt trigger G4, and the output end of the Schmitt trigger G4 is connected with the other input end of the AND gate G7;

The corresponding terminal pins of the driving chip G8 are respectively connected with the square wave signal PWM, the input terminal VCC, the output terminal of the AND gate G7 and the input terminal of the Schmidt trigger G4.

the high-voltage power supply further comprises a pull-up capacitor C2, a grounding resistor R1, resistors R2 and R3, an output end Vout, isolation diodes D1-D3, capacitors C3-C5, resistors R5-R9, a voltage regulator tube Z1, an MOS tube Q1 and a regulating diode D4;

The driving chip G8 is a driving member of the driving device 6;

The input end VCC is divided into two paths through a pull-up capacitor C2, one path is grounded through a grounding resistor R1, the other path is connected with a corresponding pin of a driving chip G8 through an isolating diode D1, the output end of an AND gate G7 is connected with a corresponding pin of a driving chip G8 through an isolating diode D2, the input end VCC is respectively connected with a corresponding pin of a driving chip G8 through resistors R2 and R3, the input end VCC is directly connected with a corresponding pin of the driving chip G8,

The input terminal VCC is connected to ground through a capacitor C4,

the COM terminal of the driving chip G8 is connected to the input terminal VCC through the capacitor C3, and to ground through the resistor R8,

the COM end of the driving chip G8 is connected with the output end Vout through a resistor R4 and a diode D3 after being converged by the capacitor C5 and the output end VCC through a resistor R9,

The output end of the driving chip G8 is connected with the G end of an MOS tube Q1 through the output ends of corresponding resistors R5-R7, and is grounded through a voltage regulator tube Z1, the S end of an MOS tube Q1 is grounded, and a regulating diode D4 is connected between the S end and the D end of an MOS tube Q1;

the output end Vout is connected with the D end of the MOS transistor Q1.

according to the automatic restart method for the IPM module overcurrent protection, by means of the electric control device 2, firstly, the electric control device 2 is lapped; then, the following steps are performed;

firstly, a fault signal CO is subjected to reverse operation through a Schmidt trigger G1, a high potential of the fault signal CO normally conducts a frequency divider U1, and meanwhile, a square wave signal PWM signal is led into the frequency divider U1; then, setting a detection time interval through a frequency divider U1, and generating a multiplied square wave signal with the period being integral multiple of the PWM signal of the square wave signal, wherein the multiplied square wave is divided into three paths; secondly, the first path generates a narrow-width pulse square wave through a trigger C2-C3 and a time delay capacitor C1; thirdly, double pulse processing is carried out on the narrow-width pulse square wave and the second path of multiplied square wave signal through an exclusive-or gate G5; next, the and gate G6 processes the double-pulse processed signal and the third multiplied square wave signal to generate a periodic single pulse;

step two, performing double control processing on the circuit through an AND gate G7 and a frequency divider U1, when the circuit is restarted, a signal closes a logic gate and a trigger to enable a driving device not to be interfered, an input end VCC conducts a driving chip G8 through a pull-up capacitor C2, and the driving chip G8 is isolated through an isolation diode D2; when the AND gate G7 is conducted with the frequency divider U1, step three is executed;

and step three, the AND gate G7 starts the driving device driving chip G8 to restart, the isolation of the input end VCC is realized through the isolation diode D1, and the IPM module is restarted.

If the IPM module is in the over-current working condition, executing the step two, and enabling the IPM module to work normally;

and if the overcurrent condition is not eliminated, continuously and periodically detecting and executing the step three.

when the temperature is higher than a set threshold value, the temperature controller starts the cooling component; firstly, driving a refrigerating sheet 3, a circulating pump body 5 and a fan 4; then, the refrigerating fins 3 realize heat absorption through thermal contact, and the radiator 8 absorbs heat at the heat absorption side of the refrigerating fins 3 through the radiator 8; finally, the heat output is achieved by the fan 4 to the radiator 8 and/or the circulation pump 5. Thereby realizing the cooling and ensuring the low-temperature work of the device. Compared with direct heat dissipation, the vibration of the circuit board is reduced, and the efficiency is high.

The IPM module overcurrent automatic starting circuit comprises a frequency divider, a Schmidt trigger, an exclusive-OR gate, an AND gate and the like.

the frequency divider mainly has the function of setting the detection time, and can be set to be one time period to ten times period of the PWM signal period. The schmitt trigger mainly functions to set the width of a narrow pulse, and different pulse widths can be set through a capacitor. Nanosecond pulse widths may be set. The exclusive-or gate can generate two periodic narrow pulses through logic operation, and the and gate removes one of the narrow pulses to form a periodic single pulse.

the group of circuits is controlled by an overcurrent fault signal, and the group of circuits does not act when the circuits work normally. And when only the module generates overcurrent, the set of circuits is controlled to be started by a fault signal.

firstly, a fault signal enables a frequency divider to start working to generate a square wave, wherein the period of the square wave is usually 1 to 10 times of the period of a PWM waveform, and the period can be adjusted according to actual needs; this newly generated PWM wave is named PWM1, PWM1 enters schmitt trigger, xor gate and gate, respectively; after entering a Schmitt trigger, generating a certain time delay through capacitance adjustment, wherein the length of the time delay is the width of the final narrow pulse and can generate nanosecond pulse width; the time delay generated PWM1 wave and the original PWM1 wave are subjected to exclusive OR operation, and periodic double pulses are generated; the double pulse is anded with the original PWM1 to generate a periodic single pulse. The IPM module can be restarted periodically by the periodic narrow pulse, and if the overcurrent condition of the IPM module is eliminated, the IPM module can work normally. If the over-current condition is not eliminated, periodic detection continues. ,

the invention has the advantages of reasonable design, low cost, firmness, durability, safety, reliability, simple operation, time and labor saving, capital saving, compact structure and convenient use. The method for automatically restarting the circuit device by the IPM module overcurrent protection can simplify peripheral circuits of the IPM module, can accurately control the detection time interval, reduce the processing delay time, meet the requirements of certain driving integrated circuits or latches on nanosecond narrow pulses and realize the intellectualization of the IPM module.