CN211195777U - New energy automobile air conditioner compressor overcurrent protection device - Google Patents
New energy automobile air conditioner compressor overcurrent protection device Download PDFInfo
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- CN211195777U CN211195777U CN201922320676.XU CN201922320676U CN211195777U CN 211195777 U CN211195777 U CN 211195777U CN 201922320676 U CN201922320676 U CN 201922320676U CN 211195777 U CN211195777 U CN 211195777U
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- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims 5
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- Air-Conditioning For Vehicles (AREA)
Abstract
The utility model provides an overcurrent protection device for a new energy automobile air conditioner compressor, which comprises a main control chip, a bus current detection circuit and a compressor driving circuit; the bus current detection circuit comprises a current acquisition circuit and a voltage amplification circuit; the input end of the current acquisition circuit is connected with the bus current circuit; the output end of the current acquisition circuit is connected with the input end of the voltage amplification circuit; the output end of the voltage amplifying circuit is connected with the AD detection port of the main control chip; and the input end of the compressor driving circuit is connected with the control signal output end of the main control chip. The utility model discloses a new energy automobile air condition compressor overcurrent protection device can stop compressor work when motor operating current is too big, protects components and parts.
Description
Technical Field
The utility model relates to a new forms of energy electric automobile air condition compressor technical field especially relates to a new forms of energy automobile air condition compressor overcurrent protection device.
Background
New energy automobiles are developed more and more rapidly, and electric automobiles are particularly prominent. At present, in the daily use of an electric automobile, the motor of an air conditioner compressor of the electric automobile is overloaded or the compressor does not work or is damaged due to overlarge pipeline pressure, so that the normal operation of devices is influenced, and meanwhile, internal elements are easily damaged.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a new energy automobile air condition compressor overcurrent protection device can stop compressor work, protection components and parts when motor operating current is too big.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an overcurrent protection device for an air conditioner compressor of a new energy automobile comprises a main control chip, a bus current detection circuit and a compressor driving circuit;
the bus current detection circuit comprises a current acquisition circuit and a voltage amplification circuit; the input end of the current acquisition circuit is connected with the bus current circuit through a sampling resistor; the output end of the current acquisition circuit is connected with the input end of the voltage amplification circuit;
the output end of the voltage amplifying circuit is connected with the AD detection port of the main control chip; and the input end of the compressor driving circuit is connected with the control signal output end of the main control chip.
The circuit is further improved as follows:
the main control chip is a micro control unit.
In the above circuit, preferably, the voltage amplifying circuit includes an operational amplifier.
In the above circuit, preferably, the voltage amplification circuit has a 10-fold amplification factor.
Preferably, the operational amplifier is a differential amplifier.
Preferably, the detection voltage value range of the AD detection port of the main control chip is 0-2.5V.
Preferably, the sampling resistor is 10 Ω.
According to the above technical scheme, the utility model discloses a new energy automobile air condition compressor overcurrent protection device gathers bus current through current acquisition circuit, then after enlargiing through amplifier circuit, judges whether the electric current magnitude exceeds the electric current numerical value of settlement through main control chip again, if then control compressor drive circuit and let the motor get into the stall state at once to reach the motor and overflow protect components and parts.
Drawings
Fig. 1 is a block diagram of an overcurrent protection device of a new energy automobile air conditioner compressor according to an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides an embodiment new energy automobile air conditioner compressor overcurrent protection device's partial circuit diagram.
Detailed Description
The technical solution of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to fig. 2, an embodiment of the present invention will first describe a structure and parameter conditions of the new energy vehicle air conditioner compressor overcurrent protection device of the present invention.
As shown in fig. 1, the overcurrent protection device for the new energy automobile air conditioner compressor of the embodiment includes a main control chip, a current acquisition circuit, a voltage amplification circuit and a compressor driving circuit. The current acquisition circuit, the voltage amplification circuit, the main control chip and the compressor driving circuit are connected in sequence.
As shown in fig. 2, the circuit structure and principle of the technical solution of this embodiment are as follows:
firstly, the current collection principle is as follows:
1. RES _ P and RES _ N are bus currents of the sampling resistors; g is amplification factor, R24, R27, R28, R30, R33, R34 and R36 are resistors; c14, C16, C18 and C20 are capacitors;
2. NCV20034 is a differential amplifier, R24 ═ 20K Ω, R27 ═ 1K Ω, and R33 ═ 1K Ω; the magnification is G is 20/(1+1) is 10 times;
3. REF _2.5V is reference voltage 2.5V, and the range of AD digital-to-analog conversion detection is 0-2.5V; IBUS is the bus current;
4. the sampling resistor R64 is 10 Ω, and the actual current value is AD voltage value/10/0.01.
Second, sample value calculation Process
1，G＝R24/(R27+R33)；
2, IBUS ═ AD/G/R64; AD is a digital-analog value, G is a magnification factor/R64 is a resistance value.
In the embodiment, the power supply of the motor is controlled by utilizing the H-bridge circuit principle, the working principle is 1, when the HINC is at a high level and the L INC is at a low level, the MOS tube U6 is conducted, the MOS tube Q2 is not conducted, and the motor normally works 2, when the HINC is at a low level and the L INC is at a low level, the MOS tube U6 is not conducted, the MOS tube Q2 is not conducted, and the motor stops working.
1. The current collection circuit is used for monitoring the current in the running process of the motor, and the current collection circuit is used for calculating the actual working current value in the running process of the motor.
2. The MCU (micro control unit) obtains a current value through the current acquisition circuit, when the MCU obtains the current value obtained by the current acquisition circuit and is compared with a current value set in the MCU, and when the current in the acquisition circuit is larger than the value set in the MCU, the MCU controls the motor driving pin to give a low level, so that the motor immediately enters a stop running state. When the current in the acquisition circuit is smaller than the value set in the MCU, the value is set according to the overcurrent of the driving circuit, generally 28A, the MCU controls the motor driving pin to output high level, and the motor is enabled to continue to operate immediately. Thereby achieving the overcurrent protection function of the motor.
According to the above technical scheme, the utility model discloses a new energy automobile air condition compressor overcurrent protection device gathers bus current through current acquisition circuit, then after enlargiing through amplifier circuit, judges whether the electric current magnitude exceeds the electric current numerical value of settlement through main control chip again, if then control compressor drive circuit and let the motor get into the stall state at once to reach the motor and overflow protect components and parts.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. The overcurrent protection device for the air conditioner compressor of the new energy automobile is characterized by comprising a main control chip, a bus current detection circuit and a compressor driving circuit;
the bus current detection circuit comprises a current acquisition circuit and a voltage amplification circuit; the input end of the current acquisition circuit is connected with the bus current circuit through a sampling resistor; the output end of the current acquisition circuit is connected with the input end of the voltage amplification circuit;
the output end of the voltage amplifying circuit is connected with the AD detection port of the main control chip; and the input end of the compressor driving circuit is connected with the control signal output end of the main control chip.
2. The overcurrent protection device for the air-conditioning compressor of the new energy automobile as claimed in claim 1, wherein the main control chip is a micro control unit.
3. The overcurrent protection device for the air conditioner compressor of the new energy automobile as claimed in claim 1, wherein the voltage amplification circuit comprises an operational amplifier.
4. The overcurrent protection device for the air-conditioning compressor of the new energy automobile as claimed in claim 3, wherein the amplification factor of the voltage amplification circuit is 10 times.
5. The overcurrent protection device for the air-conditioning compressor of the new energy automobile as claimed in claim 3, wherein the operational amplifier is a differential amplifier.
6. The overcurrent protection device of the air-conditioning compressor of the new energy automobile as claimed in claim 1, wherein the detection voltage value range of the AD detection port of the main control chip is 0-2.5V.
7. The overcurrent protection device for the air-conditioning compressor of the new energy automobile as claimed in claim 1, wherein the sampling resistor is 10 Ω in resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320676.XU CN211195777U (en) | 2019-12-20 | 2019-12-20 | New energy automobile air conditioner compressor overcurrent protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320676.XU CN211195777U (en) | 2019-12-20 | 2019-12-20 | New energy automobile air conditioner compressor overcurrent protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211195777U true CN211195777U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922320676.XU Active CN211195777U (en) | 2019-12-20 | 2019-12-20 | New energy automobile air conditioner compressor overcurrent protection device |
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| Country | Link |
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| CN (1) | CN211195777U (en) |
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2019
- 2019-12-20 CN CN201922320676.XU patent/CN211195777U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A New Energy Vehicle Air Conditioning Compressor Overcurrent Protection Device Effective date of registration: 20231228 Granted publication date: 20200807 Pledgee: Postal Savings Bank of China Limited Wangcheng County sub branch Pledgor: Hunan Haibo Intelligent Control Technology Co.,Ltd. Registration number: Y2023980075069 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |