CN218646468U - Temperature detection device of power device - Google Patents
Temperature detection device of power device Download PDFInfo
- Publication number
- CN218646468U CN218646468U CN202222564253.4U CN202222564253U CN218646468U CN 218646468 U CN218646468 U CN 218646468U CN 202222564253 U CN202222564253 U CN 202222564253U CN 218646468 U CN218646468 U CN 218646468U
- Authority
- CN
- China
- Prior art keywords
- resistor
- temperature
- sampling circuit
- capacitor
- grounded
- 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
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
The utility model provides a temperature-detecting device of power device is applicable to new energy automobile motor controller, include: the temperature sensor comprises an aluminum substrate and a control board, wherein a temperature resistor NTC or PTC is placed on the aluminum substrate and used for identifying temperature; the control panel is provided with a plurality of AD sampling circuits for measuring the voltage of the AD port. The device is used for measuring and calculating temperature sets corresponding to different bridge arms of the power device, then judging the maximum value and the minimum value, and combining corresponding parameters to finely control an output load curve, so that the overload curve of the motor controller has pertinence and rationality.
Description
Technical Field
The utility model relates to a power device application especially relates to a temperature-detecting device of power device.
Background
When the power semiconductor is used, attention is usually paid to temperature control of the power semiconductor, and the power semiconductor needs to be loaded in a proper temperature range, so that the overload curve of the motor controller is more targeted and reasonable.
However, in the basic method for detecting the temperature of the power semiconductor at present, one temperature sensor is used for detecting the temperature of the radiator or a plurality of temperature sensors are used for carrying out temperature control by taking the maximum value, for example, CN208847367U "a temperature detection circuit", a plurality of temperature sensors are used for detecting, when the parameter margin of the device is enough, the simple processing has no problem, but when the parameter margin selectable by the device on the market is not large, the use condition must be strictly controlled.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a temperature-detecting device of power device for solve the problem that traditional temperature detection method can not be suitable for when device parameter surplus is not enough.
The technical scheme of the utility model is realized like this: a temperature detection apparatus of a power device, comprising: aluminium base board and control panel.
A temperature resistor NTC or PTC is arranged on the aluminum substrate and used for identifying temperature;
the control panel is provided with a plurality of AD sampling circuits for measuring the voltage of an AD port.
Preferably, the sampling circuits include three sampling circuits, which are respectively a first AD sampling circuit, a second AD sampling circuit and a third AD sampling circuit, and the first AD sampling circuit, the second AD sampling circuit and the third AD sampling circuit are independently arranged in each bridge arm to collect a voltage value corresponding to the temperature of each bridge arm.
Preferably, the first AD sampling circuit includes;
a resistor R158, a resistor R159, a resistor R8 and a capacitor C176;
the V _3V3 \ D end inputs a signal to one end of a resistor R158, the other end of the resistor R158 is electrically connected with one ends of a resistor R8 and a resistor R159, the other end of the resistor R159 is electrically connected with one end of a capacitor C176 and an output end TC1782, the other end of the capacitor C176 is grounded, and the other end of the resistor R8 is grounded.
Preferably, the second AD sampling circuit includes;
a resistor R162, a resistor R163, a resistor R6, and a capacitor C179;
the V _3v3 _dterminal inputs a signal to one end of the resistor R162, the other end of the resistor R162 is electrically connected to one ends of the resistor R6 and the resistor R163, the other end of the resistor R163 is electrically connected to one end of the capacitor C179 and the output terminal TC1782, the other end of the capacitor C179 is grounded, and the other end of the resistor R6 is grounded.
Preferably, the third AD sampling circuit includes;
a resistor R167, a resistor R168, a resistor R7 and a capacitor C181;
the V _3V3 \ D end inputs a signal to one end of a resistor R167, the other end of the resistor R167 is electrically connected with one ends of a resistor R7 and a resistor R168, the other end of the resistor R168 is electrically connected with one end of a capacitor C181 and an output end TC1782, the other end of the capacitor C181 is grounded, and the other end of the resistor R7 is grounded.
Preferably, the resistors R8, R6 and R7 are temperature sensitive resistors, and the voltage value obtained in the circuit is inversely proportional to the temperature.
Preferably, the first AD sampling circuit, the second AD sampling circuit, and the third AD sampling circuit are simultaneously connected to different arms of the power device, and the temperature value corresponding to each arm is calculated according to voltages at two ends of the temperature sensitive resistors R8, R6, and R7.
The utility model provides a pair of power device's temperature-detecting device for prior art, has following beneficial effect:
(1) A plurality of temperatures are detected by using a multi-channel AD sampling circuit, the maximum value and the minimum value are judged, and the output load curve is finely controlled by combining parameters of a power device, so that the motor controller is ensured to operate more reliably and safely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of a first AD sampling circuit of a temperature detection device of a power device according to the present invention;
fig. 2 is a circuit diagram of a second AD sampling circuit of the temperature detection device of the power device according to the present invention;
fig. 3 is a circuit diagram of a third AD sampling circuit of the temperature detection device of the power device of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
Example one
Provided is a temperature detection apparatus of a power device, including;
aluminium base board and control panel.
A temperature resistor NTC or PTC is arranged on the aluminum substrate and used for identifying temperature;
the control panel is provided with a plurality of AD sampling circuits for measuring the voltage of an AD port.
The plurality of AD sampling circuits include a first AD sampling circuit, a second AD sampling circuit, and a third AD sampling circuit.
The first AD sampling circuit, the second AD sampling circuit and the third AD sampling circuit simultaneously acquire the voltages of temperature-sensitive resistors corresponding to a plurality of bridge arms of the power device, calculate and record temperature values corresponding to the voltages, and then judge the maximum value and the minimum value from the temperatures.
A first AD sampling circuit, as shown in fig. 1, including;
a resistor R158, a resistor R159, a resistor R8 and a capacitor C176;
the V _3V3_D end inputs a signal to one end of a resistor R158, the other end of the resistor R158 is electrically connected with one ends of a resistor R8 and a resistor R159, the other end of the resistor R159 is electrically connected with one end of a capacitor C176 and an output end TC1782, the other end of the capacitor C176 is grounded, and the other end of the resistor R8 is grounded.
The NTC1+ end is grounded through a temperature detection resistor R8, and a voltage value is generated by voltage division of a resistor R158 and the temperature detection resistor R8; the capacitor C176 is equivalent to an open circuit and forms an RC filter circuit with the resistor R159, so that current cannot reach the ground through the capacitor C176 and only is added to the resistor R159, the voltage of the resistor R158 and the temperature detection resistor R8 is divided, the divided voltage is sent to an AD sampling port of the MCU control chip for sampling after RC filtering, the voltage at two ends of the temperature detection resistor R8 is detected, and a corresponding temperature value is calculated and recorded.
A second AD sampling circuit, as shown in fig. 2, including;
a resistor R162, a resistor R163, a resistor R6, and a capacitor C179;
the V _3v3 _dterminal inputs a signal to one end of the resistor R162, the other end of the resistor R162 is electrically connected to one ends of the resistor R6 and the resistor R163, the other end of the resistor R163 is electrically connected to one end of the capacitor C179 and the output terminal TC1782, the other end of the capacitor C179 is grounded, and the other end of the resistor R6 is grounded.
The NTC2+ end is grounded through a temperature detection resistor R6, and the resistor R162 and the temperature detection resistor R6 divide voltage to generate a voltage value; the capacitor C179 is equivalent to an open circuit and forms an RC filter circuit with the resistor R163, so that current cannot be transmitted to the ground through the capacitor C179 but only is added to the resistor R163, the voltage of the resistor R162 and the temperature detection resistor R6 is divided, the divided voltage is transmitted to an AD sampling port of the MCU control chip for sampling after RC filtering, the voltage at two ends of the temperature detection resistor R8 is detected, and a corresponding temperature value is calculated and recorded.
A third AD sampling circuit, as shown in fig. 3, including;
a resistor R167, a resistor R168, a resistor R7 and a capacitor C181;
the V _3V3 \ D end inputs a signal to one end of a resistor R167, the other end of the resistor R167 is electrically connected with one ends of a resistor R7 and a resistor R168, the other end of the resistor R168 is electrically connected with one end of a capacitor C181 and an output end TC1782, the other end of the capacitor C181 is grounded, and the other end of the resistor R7 is grounded.
The NTC3+ end is grounded through a temperature detection resistor R7, and the resistor R167 and the temperature detection resistor R7 divide voltage to generate a voltage value; the capacitor C181 is equivalent to an open circuit, and forms an RC filter circuit with the resistor R168, so that the current cannot reach the ground through the capacitor C181 but is only added to the resistor R168, and the voltage divided by the resistor R167 and the temperature detection resistor R7 is sent to an AD sampling port of the MCU control chip for sampling after RC filtering, the voltage at two ends of the temperature detection resistor R8 is detected, and the corresponding temperature value is calculated and recorded.
The three AD sampling circuits are mutually independent and do not influence each other.
And judging the maximum value and the minimum value according to the temperature values obtained by the three AD sampling circuits.
Analyzing preset functions of the power device in a low-temperature state, such as a function at the temperature of-40 ℃ to-30 ℃, a function at the temperature of-30 ℃ to-20 ℃, a function at the temperature of-20 ℃ to-10 ℃, and a function at the temperature of-10 ℃ to 0 ℃; or a unified function is set between-40 ℃ and 0 ℃, and the temperature range value of the specific function is adjusted according to the application condition. The voltage spike generated by the operating current threshold value and the overcurrent point value corresponding to each temperature is lower than the withstand voltage value of the power device at the same temperature.
For the power device in a high-temperature state, heating temperature data is collected, a test is output under the maximum full load, the heating condition of the power device is tested, and the time for the device to be cooled to a proper temperature is tested, such as 0-20 ℃, 20-40 ℃ and 40-85 ℃, the temperature range is exemplified, and the specific temperature range is adjusted according to the application condition.
The fast recovery diode is assumed as the most key point device, the protection temperature is 90 ℃, the recovery temperature is 80 ℃, and the overload curve corresponding to the temperature is set under the high-temperature curve through data acquisition, so that the high-temperature overload protection cannot occur in normal operation.
And the parameters of the power device are combined for fine control, the parameters comprise ID drain current and VDS drain-source voltage, and a load curve is output, so that the overload curve of the motor controller has pertinence and rationality. Therefore, the motor controller can run more reliably and safely, and the power is improved more stably and efficiently.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A temperature detection device of a power device is characterized in that: comprises an aluminum substrate and a control panel,
a temperature resistor NTC or PTC is arranged on the aluminum substrate and used for identifying temperature;
and the control board is provided with a plurality of AD sampling circuits for measuring the voltage of an AD port.
2. The temperature detection device of claim 1, wherein the sampling circuits include three sampling circuits, which are a first AD sampling circuit, a second AD sampling circuit, and a third AD sampling circuit, respectively, and the first AD sampling circuit, the second AD sampling circuit, and the third AD sampling circuit are independently disposed in each bridge arm to collect a voltage value corresponding to a temperature of each bridge arm.
3. The apparatus according to claim 2, wherein the first AD sampling circuit comprises;
a resistor R158, a resistor R159, a resistor R8 and a capacitor C176;
the V _3V3 \ D end inputs a signal to one end of a resistor R158, the other end of the resistor R158 is electrically connected with one ends of a resistor R8 and a resistor R159, the other end of the resistor R159 is electrically connected with one end of a capacitor C176 and an output end TC1782, the other end of the capacitor C176 is grounded, and the other end of the resistor R8 is grounded.
4. The apparatus according to claim 3, wherein the second AD sampling circuit comprises;
a resistor R162, a resistor R163, a resistor R6, and a capacitor C179;
the V _3v3 _dterminal inputs a signal to one end of the resistor R162, the other end of the resistor R162 is electrically connected to one ends of the resistor R6 and the resistor R163, the other end of the resistor R163 is electrically connected to one end of the capacitor C179 and the output terminal TC1782, the other end of the capacitor C179 is grounded, and the other end of the resistor R6 is grounded.
5. The apparatus for detecting temperature of a power device according to claim 4, wherein said third AD sampling circuit includes;
a resistor R167, a resistor R168, a resistor R7 and a capacitor C181;
the V _3V3 \ D end inputs a signal to one end of a resistor R167, the other end of the resistor R167 is electrically connected with one ends of a resistor R7 and a resistor R168, the other end of the resistor R168 is electrically connected with one end of a capacitor C181 and an output end TC1782, the other end of the capacitor C181 is grounded, and the other end of the resistor R7 is grounded.
6. The apparatus as claimed in claim 5, wherein the resistors R8, R6 and R7 are temperature sensitive resistors, and the voltage value obtained in the circuit is inversely proportional to the temperature.
7. The device for detecting the temperature of the power device according to claim 6, wherein the first AD sampling circuit, the second AD sampling circuit and the third AD sampling circuit are simultaneously connected to different bridge arms of the power device, and the temperature value corresponding to each bridge arm is calculated according to voltages at two ends of the temperature sensitive resistors R8, R6 and R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222564253.4U CN218646468U (en) | 2022-09-27 | 2022-09-27 | Temperature detection device of power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222564253.4U CN218646468U (en) | 2022-09-27 | 2022-09-27 | Temperature detection device of power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218646468U true CN218646468U (en) | 2023-03-17 |
Family
ID=85493580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222564253.4U Active CN218646468U (en) | 2022-09-27 | 2022-09-27 | Temperature detection device of power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218646468U (en) |
-
2022
- 2022-09-27 CN CN202222564253.4U patent/CN218646468U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6888469B2 (en) | Method and apparatus for estimating semiconductor junction temperature | |
| Schweighofer et al. | Modeling of high power automotive batteries by the use of an automated test system | |
| CA1191201A (en) | Automotive battery test apparatus | |
| US4680528A (en) | Battery charging device | |
| US9612290B2 (en) | Reducing or avoiding noise in measured signals of a tested battery cell(s) in a battery power system used to determine state of health (SOH) | |
| EP3767312B1 (en) | Current sampling method and current sampling circuit | |
| CN110311351A (en) | Current foldback circuit and load circuit | |
| CN106875619B (en) | Combined type electric fire monitoring detector | |
| US11774470B2 (en) | Load detection system and load detection method thereof | |
| CN105044622A (en) | Test instrument power supply power self-detection device and self-detection method | |
| CN218646468U (en) | Temperature detection device of power device | |
| CN210835171U (en) | Battery voltage detection circuit and battery voltage detection device | |
| JP2000194456A (en) | Battery monitoring device | |
| CN109656276B (en) | Automatic driving system working assembly, temperature adjusting method, system and storage medium | |
| CN116754915A (en) | Working junction temperature monitoring system and method of semiconductor switching device | |
| CN208421141U (en) | A kind of Partial discharge signal simulator with temperature protection and overvoltage protection | |
| CN111781512A (en) | Battery testing device | |
| JP3238135B2 (en) | Automatic power turn-on circuit for battery-powered voltage measuring devices | |
| WO2021088516A1 (en) | Detection circuit and integrated circuit | |
| CN103852683B (en) | A kind of detection circuit and method | |
| CN208508828U (en) | Sample circuit and electric machine control system | |
| CN112918111B (en) | Printing head resistance value determining device and method and printer | |
| CN117254747B (en) | Temperature detection device of frequency converter, control method thereof and frequency converter | |
| CN118112389B (en) | On-line junction temperature detection circuit and method for power semiconductor device | |
| CN220983381U (en) | Household high-power charging load data recording device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |