CN209562148U - A kind of IPM overcurrent and thermal-shutdown circuit - Google Patents
A kind of IPM overcurrent and thermal-shutdown circuit Download PDFInfo
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- CN209562148U CN209562148U CN201920021346.8U CN201920021346U CN209562148U CN 209562148 U CN209562148 U CN 209562148U CN 201920021346 U CN201920021346 U CN 201920021346U CN 209562148 U CN209562148 U CN 209562148U
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Abstract
The utility model relates to a kind of IPM overcurrent and thermal-shutdown circuits; including; the signal input part being connect with IPM module; the signal output end being connect with MCU module; and it is connected to the comparison circuit between signal input part and signal output end; the comparison circuit includes that reference voltage output circuit connects to power supply；Comparator, one input end are connect with reference voltage output circuit, and to receive reference voltage signal, another input terminal is connect by the signal input part with IPM module, and the output end of comparator is connect by the signal output end with MCU module；The signal input part shares delivery outlet with the temperature detection of IPM module and overcurrent signal and connect；The comparator is compared the voltage of reference voltage and signal input part, and comparison result is delivered to MCU module, and the MCU module is made to control the operating status of IPM module according to comparison result.The utility model only takes up a pin of single-chip microcontroller, and is able to achieve and provides protection in overcurrent and excess temperature for IPM.
Description
Technical field
The utility model relates to IPM to protect circuit, especially a kind of IPM overcurrent and thermal-shutdown circuit.
Background technique
With the development of power electronics industry, IPM's is more and more broader using field, relative to the common driving side IGBT+
Case, engineers more focus on this intelligence, the IPM scheme of miniaturization.In IPM in use, needing to protect it, in overcurrent
It in the case where excess temperature, needs that IPM is made to stop working, to avoid its damage.Application No. is 201620760332.4 China is real
A kind of frequency converter protection circuit based on DSP and IPM module is disclosed with new patent, comprising: main controller circuit, IPM mould
Block circuit, overvoltage crowbar, thermal-shutdown circuit, current foldback circuit and failure lockout circuit；It applies the DSP of TI company
The intelligent power module module I RAMS10UP60B for controlling chip TMS320LF2406 and IR company, it is female by sampling direct current
Line voltage, the temperature and current signal of IPM inside modules pass to master controller TMS320LF2406, carry out data comparison and divide
Whether analysis, decision circuitry there are the unsafe conditions such as overvoltage, excessively mild overcurrent, and if there is danger, master controller issues block
Signal FAULT and PDPINTA, wherein FAULT is used to block the SVPWM pulse of IPM module, PDPINTA block
The six road SVPWM pulses that TMS320LF2406 is generated, while TMS320LF2406 issues IPM_EN signal and blocks 74AC244, it is real
Show based on the multi-faceted of software and hardware, multiple closed loop circuit protection realizes the safe and reliable operation of frequency converter.The patent
Thermal-shutdown circuit, current foldback circuit individually occupy an input pin of master controller (single-chip microcontroller), cause pin
The wasting of resources, and its circuit structure is also more complicated.
Given this utility model is proposed.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of IPM overcurrent and overheat protector
Circuit, only takes up a pin of single-chip microcontroller, and is able to achieve and provides protection in overcurrent and excess temperature for IPM.
In order to realize the purpose, the utility model adopts the following technical solution:
A kind of IPM overcurrent and thermal-shutdown circuit, including, the signal input part for being connect with IPM module, for
The signal output end of MCU module connection, and the comparison circuit being connected between signal input part and signal output end, the ratio
Include compared with circuit,
Reference voltage output circuit connects to power supply, and is configured as output to a reference voltage；
Comparator, one input end are connect with reference voltage output circuit, to receive reference voltage signal, another input terminal
It is connect by the signal input part with IPM module, the output end of comparator is connected by the signal output end and MCU module
It connects；
The signal input part shares delivery outlet with the temperature detection of IPM module and overcurrent signal and connect；
The comparator arrangement is to be compared to the voltage of reference voltage and signal input part, and comparison result is conveyed
To MCU module, the MCU module is made to control the operating status of IPM module according to comparison result.
Further, the comparison circuit further includes a comparison resistance R3, and one end of the comparison resistance R3 connects to power supply,
The other end is made up of the thermistor in signal input part and IPM module and is connected in series.
Further, the resistance value of the comparison resistance R3 is configured to identical as resistance value of thermistor at a temperature of certain,
The temperature is the protection temperature of IPM module.
Further, the reference voltage output circuit includes the resistance R1 and resistance R2 being connected in series, the comparator
One input terminal is connected between resistance R1 and resistance R2.
Further, the resistance R1 is identical with the resistance value of resistance R2, and the reference voltage is the 1/2 of supply voltage.
Further, it is logical that resistance a R5, the resistance R5 is additionally provided between the output end and signal output end of the comparator
Resistance R4 is crossed to connect to power supply.
Further, the input terminal of the comparator is also connected by a capacity earth respectively with output end.
Further, the reference voltage is added in the reverse input end of comparator, and the output signal of the IPM module is added in ratio
Compared with the non-inverting input terminal of device.
Further, the temperature detection and overcurrent signal share the VFO delivery outlet that delivery outlet is IPM module, the IPM
The model IKCM15L60 of module.
After technical solution described in the utility model, bring it is following the utility model has the advantages that
The signal output end of the utility model only takes up a pin of MCU module (single-chip microcontroller), in IPM overcurrent and excess temperature
Shi Junneng triggers MCU movement, it is made to control IPM module from service, the protection to IPM module is realized, relative to traditional IPM
For protection circuit needs to occupy at least two MCU pins, since the utility model only takes up a pin of MCU, one
Block MCU module can control more IPM modules, effectively reduce the purchase quantity and use cost of MCU module, and whole electricity
Line structure is simpler, and stability is more preferable.
Detailed description of the invention
Fig. 1: the circuit diagram of the utility model embodiment；
Fig. 2: the internal electric schematic diagram of the IPM module in the utility model embodiment；
Wherein: 1, IPM module 2, comparison circuit 3, MCU module 4, signal input part 5, signal output end.
Specific embodiment
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
As depicted in figs. 1 and 2, a kind of IPM overcurrent and thermal-shutdown circuit, including, for what is connect with IPM module 1
Signal input part 4, the signal output end 5 for being connect with MCU module 3, and it is connected to signal input part 4 and signal output end
Comparison circuit 2 between 5.The model IKCM15L60 of IPM module 1 described in the present embodiment, however, it is not limited to this,
The IPM module 1 of IKCM15L60 type is exported using temperature protection and overcurrent protection as a pin VFO.It is internally provided with temperature-sensitive
Resistance Thermistor, thermistor Thermistor are connected between pin VFO and pin VSS, and wherein pin VSS is grounded.
The comparison circuit 2 includes reference voltage output circuit, comparator ICA and comparison resistance R3.
The reference voltage output circuit is connect with power supply VCC, and is configured as output to a reference voltage.Specifically, described
Reference voltage output circuit includes the resistance R1 and resistance R2 being connected in series, and wherein one end of resistance R1 is connect with power supply VCC, electricity
One end ground connection of R2 is hindered, resistance R1 is identical with the resistance value of resistance R2, and each ohmically voltage is the 1/2 of power supply VCC voltage.
The reverse input end of the comparator ICA is connect with reference voltage output circuit, to receive reference voltage signal, tool
Body is that the reverse input end of comparator ICA is connected between resistance R1 and resistance R2, so that the base of input comparator ICA
Quasi- voltage is the 1/2 of power supply VCC voltage.The non-inverting input terminal of the comparator ICA passes through the signal input part 4 and IPM mould
Block 1 connects, and in particular signal input part 4 shares delivery outlet with the temperature detection of IPM module 1 and overcurrent signal and connect, i.e.,
Pin VFO.The output end of the comparator ICA is connect by the signal output end 5 with MCU module 3.
The effect of the comparator ICA is compared to the voltage of reference voltage and signal input part 4, output end then
With high level or low level to reflect comparison result, and comparison result is delivered to MCU module 3, makes 3 basis of MCU module
The operating status of comparison result control IPM module 1.Specifically, described when the voltage of signal input part 4 is greater than reference voltage
Comparator ICA is configured as output to high level signal, and MCU module 3 controls IPM module 1 and remains operational state；When signal input part 4
Voltage when being less than reference voltage, the comparator ICA is configured as output to low level signal, and MCU module 3 controls IPM module 1 and stops
Only run.
The process of overcurrent protection are as follows: when IPM 1 overcurrent of module, the triggering of ITRIP current detecting causes pin VFO to export
Low level, by being compared with the reference voltage of comparator ICA, output low level to MCU module 3, MCU module 3 is detected
Level overturning, so that shutdown six road PWM output, makes IPM module 1 stop working, and then protect IPM module 1 not damaged.
One end of the comparison resistance R3 is connect with power supply VCC, and the other end passes through in signal input part 4 and IPM module 1
Thermistor Thermistor, which is constituted, to be connected in series, and the resistance value of thermistor Thermistor can occur with the variation of temperature
Change, specifically, thermistor Thermistor is NTC resistance, and resistance value is lower when temperature is higher.Due to thermistor
Thermistor connects with comparison resistance R3, will be so that signal is defeated when the resistance value of thermistor Thermistor changes
The voltage for entering end 4 changes, and when the voltage of signal input part 4 is less than reference voltage, triggering MCU module 3 is controlled IPM mould
Block 1 is out of service.
Preferably, the resistance value of the comparison resistance R3 is configured to the thermistor Thermistor at a temperature of certain
Resistance value is identical, which is the protection temperature of IPM module 1.
The process of overheat protector are as follows: when ambient temperature is higher than protection temperature, the resistance value of thermistor Thermistor will
Less than comparison resistance R3, so that the voltage of signal input part 4 is less than reference voltage, comparator ICA exports low level signal to MCU
Module 3, MCU module 3 detect that level is overturn, so that shutdown six road PWM output, makes IPM module 1 stop working, and then protect
IPM is not damaged.
Preferably, a resistance R5, the resistance are additionally provided between the output end and signal output end 5 of the comparator ICA
R5 is connect by resistance R4 with power supply VCC.
Preferably, the input terminal of the comparator ICA is also connected by a capacity earth respectively with output end, plays blocking
The effect of circulation exchange.
The above is the embodiments of the present invention, it is noted that for the ordinary skill in the art,
Under the premise of not departing from the utility model principle, various deformation and improvement can also be made, this also should be considered as the utility model
Protection scope.
Claims (9)
1. a kind of IPM overcurrent and thermal-shutdown circuit, including, the signal input part for being connect with IPM module, for
The signal output end of MCU module connection, and the comparison circuit being connected between signal input part and signal output end, feature
Be: the comparison circuit includes,
Reference voltage output circuit connects to power supply, and is configured as output to a reference voltage；
Comparator, one input end are connect with reference voltage output circuit, and to receive reference voltage signal, another input terminal passes through
The signal input part is connect with IPM module, and the output end of comparator is connect by the signal output end with MCU module；
The signal input part shares delivery outlet with the temperature detection of IPM module and overcurrent signal and connect；
The comparator arrangement is to be compared to the voltage of reference voltage and signal input part, and comparison result is delivered to
MCU module.
2. a kind of IPM overcurrent according to claim 1 and thermal-shutdown circuit, it is characterised in that: the comparison circuit
It further include a comparison resistance R3, one end of the comparison resistance R3 connects to power supply, and the other end passes through signal input part and IPM mould
Thermistor in block, which is constituted, to be connected in series.
3. a kind of IPM overcurrent according to claim 2 and thermal-shutdown circuit, it is characterised in that: the comparison resistance
The resistance value of R3 be configured to it is identical as resistance value of thermistor at a temperature of certain, the temperature be IPM module protection temperature.
4. a kind of IPM overcurrent according to claim 1 and thermal-shutdown circuit, it is characterised in that: the reference voltage
Output circuit includes the resistance R1 and resistance R2 being connected in series, and an input terminal of the comparator is connected to resistance R1 and resistance R2
Between.
5. a kind of IPM overcurrent according to claim 4 and thermal-shutdown circuit, it is characterised in that: the resistance R1 and
The resistance value of resistance R2 is identical, and the reference voltage is the 1/2 of supply voltage.
6. a kind of IPM overcurrent according to claim 1 and thermal-shutdown circuit, it is characterised in that: the comparator
A resistance R5 is additionally provided between output end and signal output end, the resistance R5 is connected to power supply by resistance R4.
7. a kind of IPM overcurrent according to claim 1 and thermal-shutdown circuit, it is characterised in that: the comparator
Input terminal is also connected by a capacity earth respectively with output end.
8. a kind of IPM overcurrent according to claim 1 and thermal-shutdown circuit, it is characterised in that: the reference voltage
It is added in the reverse input end of comparator, the output signal of the IPM module is added in the non-inverting input terminal of comparator.
9. a kind of IPM overcurrent according to claim 1 and thermal-shutdown circuit, it is characterised in that: the temperature detection
The VFO delivery outlet that delivery outlet is IPM module, the model IKCM15L60 of the IPM module are shared with overcurrent signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920021346.8U CN209562148U (en) | 2019-01-07 | 2019-01-07 | A kind of IPM overcurrent and thermal-shutdown circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920021346.8U CN209562148U (en) | 2019-01-07 | 2019-01-07 | A kind of IPM overcurrent and thermal-shutdown circuit |
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| CN209562148U true CN209562148U (en) | 2019-10-29 |
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| CN201920021346.8U Active CN209562148U (en) | 2019-01-07 | 2019-01-07 | A kind of IPM overcurrent and thermal-shutdown circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659905A (en) * | 2019-01-07 | 2019-04-19 | 山东朗进科技股份有限公司 | A kind of IPM overcurrent and thermal-shutdown circuit |
| CN116093888A (en) * | 2023-04-08 | 2023-05-09 | 辰星（天津）自动化设备有限公司 | Industrial robot power module protection system |
-
2019
- 2019-01-07 CN CN201920021346.8U patent/CN209562148U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659905A (en) * | 2019-01-07 | 2019-04-19 | 山东朗进科技股份有限公司 | A kind of IPM overcurrent and thermal-shutdown circuit |
| CN116093888A (en) * | 2023-04-08 | 2023-05-09 | 辰星（天津）自动化设备有限公司 | Industrial robot power module protection system |
| CN116093888B (en) * | 2023-04-08 | 2023-08-18 | 辰星（天津）自动化设备有限公司 | Industrial robot power module protection system |
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