CN211335593U - High-voltage interlocking detection circuit of motor controller - Google Patents
High-voltage interlocking detection circuit of motor controller Download PDFInfo
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- CN211335593U CN211335593U CN201921470531.1U CN201921470531U CN211335593U CN 211335593 U CN211335593 U CN 211335593U CN 201921470531 U CN201921470531 U CN 201921470531U CN 211335593 U CN211335593 U CN 211335593U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model relates to a machine controller high pressure interlocking detection circuitry belongs to the machine control technology field, including Schmidt trigger and optoelectronic coupler, the input and the measured component of Schmidt trigger are connected, and its output is connected with optoelectronic coupler's input, optoelectronic coupler's output is connected with machine controller's main control chip through a pull-up resistance R5. The utility model adds a high-voltage interlocking detection circuit in the motor controller aiming at the defect of slow reaction of the current high-voltage interlocking detection, compared with the prior art, the high-voltage interlocking detection circuit has simple structure and low cost; the motor controller is used for bearing the task of high-voltage interlocking detection, the CAN communication time is saved, the response speed is higher, the failure rate of the MCU during failure CAN be greatly reduced, and the safety of the whole vehicle is improved.
Description
Technical Field
The utility model belongs to the technical field of motor control, especially, relate to a machine controller high pressure interlocking detection circuitry.
Background
With the continuous improvement of policy and regulation of the electric automobile industry in China, the electric automobile industry is more and more mature. In order to popularize and popularize the electric automobile into common people, it is very urgent to reduce the cost and improve the safety of the whole automobile, and the high-voltage interlocking detection system is used as an important component of the safety of the whole electric automobile, and the detection effect and the reaction speed of the high-voltage interlocking detection system directly have great influence on the safety of the pure electric automobile and passengers.
The high-voltage interlocking means that all shunts connected with a high-voltage bus on the electric automobile are checked by using a low-voltage signal, and the electrical connection integrity (continuity) of a system loop including a whole battery system, a lead wire, a connector, DCDC, a motor controller, a high-voltage box, a protective cover and the like is checked. The existing commonly used high-voltage interlocking detection circuit has a complex structure and higher cost. In addition, the high-voltage interlocking detection executing mechanism of the pure electric vehicle on the market at present is generally a BMS (battery management system) or a VCU (vehicle control unit), and when a high-voltage interlocking loop is incomplete, the BMS or the VCU firstly informs an MCU (motor controller) to stop the operation of a driving system through CAN communication, and then the connection of a battery is disconnected, so that the purpose of protecting the safety of the vehicle is achieved. In the process, the time from the occurrence of the fault to the stop of the driving system comprises CAN communication time + MCU execution time, the time delay is long, the reaction speed is slow, and if the high voltage cannot be timely disconnected, the failure of the MCU or the safety accident of the whole vehicle is possibly caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art's problem with regard to, provide a machine controller high pressure interlocking detection circuitry to it is slow to solve present high pressure interlocking detection reaction, and the circuit is complicated, technical problem such as with high costs.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a high-voltage interlocking detection circuit of a motor controller comprises a voltage division circuit consisting of resistors R1 and R2, a Schmidt trigger consisting of a 555 timer and a peripheral circuit thereof, a photoelectric coupler and a pull-up resistor R5, wherein the input end of the 555 timer is connected with a tested element through the voltage division circuit, the output end of the 555 timer is connected with the input end of the photoelectric coupler, and the output end of the photoelectric coupler is connected with a main control chip of the motor controller through the pull-up resistor R5.
Further preferably, one end of the resistor R2 is connected to an external regulated power supply, the other end is connected to the positive detection electrode of the device under test, one end of the resistor R1 is connected to the negative detection electrode of the device under test and the input end of the 555 timer, and the other end is grounded.
Further preferably, the output end of the 555 timer is connected to the input end of the photocoupler through a resistor R3.
Further preferably, the model of the photocoupler is ACPL-M61L, the ACPL-M61L photocoupler comprises AN, CATH, VDD and VO ports, the output end of the 555 timer is connected with a resistor R3 and then is divided into two branches, one branch is directly connected with the AN port of the ACPL-M61L photocoupler, and the other branch is connected with the CATH port of the ACPL-M61L photocoupler through a capacitor C3.
Further preferably, a VDD port of the ACPL-M61L photocoupler is connected to one end of the pull-up resistor R5, a Vo port of the ACPL-M61L photocoupler is connected to the other end of the pull-up resistor R5, and the other branch of the VO port of the ACPL-M61L photocoupler is connected to a general I/O port of a main control chip of the motor controller through a resistor R6.
The principle of the invention is as follows: the Schmidt trigger composed of the 555 timer is connected with the photoelectric coupler, a Vo port of the photoelectric coupler outputs a signal to a general I/O port of the main control chip, and the main control chip judges whether a high-voltage interlocking loop of the whole vehicle is normal or not according to the high and low levels acquired by IO. And the purpose of increasing the isolation optocoupler can reduce the influence of the interference of a high-voltage interlocking loop of the whole vehicle on the main control chip, and the integral anti-interference capability of the motor controller is improved.
The beneficial effects of the utility model reside in that: the utility model adds a high-voltage interlocking detection circuit in the motor controller aiming at the defect of slow reaction of the current high-voltage interlocking detection, and the high-voltage interlocking detection circuit has simple structure and low cost; the motor controller is used for bearing the task of high-voltage interlocking detection, CAN communication time is saved, the reaction speed is higher, once the high-voltage interlocking loop of any node of the electric automobile is detected to be incomplete, the operation of a driving system CAN be immediately stopped, meanwhile, a fault is reported to a VCU, other high-voltage reduction actions are controlled by the VCU, the failure rate of the MCU during the fault CAN be greatly reduced, and the safety of the whole automobile is improved.
Drawings
Fig. 1 is a schematic circuit structure diagram of a high-voltage interlock detection circuit of a motor controller according to the present invention;
FIG. 2 is a schematic diagram of the connection between the whole vehicle to-be-tested component and the high-voltage interlock detection circuit in normal operation;
fig. 3 is a schematic diagram of connection between a finished automobile component to be tested and a high-voltage interlock detection circuit in an abnormal state.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 2 and 3, other parts of the whole vehicle include high-voltage interlocking wires of high-voltage parts such as a high-voltage box, a battery system, DCDC, a vehicle-mounted charger, an air conditioner and the like, which are in the prior art.
The embodiment provides a high-voltage interlock detection circuit of a motor controller, as shown in fig. 1, which includes a voltage dividing circuit composed of resistors R1 and R2, a schmitt trigger composed of a 555 timer and peripheral circuits thereof, a photocoupler and a pull-up resistor R5, wherein:
one end of the resistor R2 is connected with an external voltage-stabilized power supply, the other end of the resistor R2 is connected with the detection anode of the detected element, one end of the resistor R1 is connected with the detection cathode of the detected element and the input end of the 555 timer respectively, and the other end of the resistor R1 is grounded.
The output end of the 555 timer is connected to the input end of the photoelectric coupler through a resistor R3;
the model of the photoelectric coupler is ACPL-M61L, the ACPL-M61L photoelectric coupler comprises AN, CATH, VDD and VO ports, the output end of the 555 timer is connected with a resistor R3 and then is divided into two branches, one branch is directly connected with the AN port of the ACPL-M61L photoelectric coupler, and the other branch is connected to the CATH port of the ACPL-M61L photoelectric coupler through a capacitor C3; the VDD port of the ACPL-M61L photoelectric coupler is connected to one end of a pull-up resistor R5, the Vo port of the ACPL-M61L photoelectric coupler is connected to the other end of the pull-up resistor R5, and the other branch of the VO port of the ACPL-M61L photoelectric coupler is connected to a general I/O port of a main control chip of the motor controller through a resistor R6.
The specific working process is shown in fig. 2 and 3:
when the whole vehicle high-voltage interlocking system is normal, as shown in fig. 2, R1 and R2 form a voltage divider circuit, the voltage of the input 555 pin 2 and pin 6 is 4.16V, which is greater than (2/3) × 5V ═ 3.33V, at this time, the output 555 pin 3 is low level, so that the light emitting diode of the isolation optocoupler is in OFF state, the isolation optocoupler does not work, and then, because the output end of the isolation optocoupler is provided with a pull-up resistor R5, the output of the isolation optocoupler is high level;
when the whole vehicle high-voltage interlock system is abnormal, as shown in fig. 3, that is, the whole vehicle high-voltage interlock series circuit is disconnected at a certain point or the contact resistance of the connector is increased, the high-voltage interlock detection circuit of the motor controller can detect the high-voltage interlock detection circuit. When the whole vehicle high-voltage interlocking system is disconnected at a certain point, the values of the input pins 2 and 6 of 555 are 0V and are lower than (1/3) × 5V which is 1.67V, then, the output of the pin 3 of 555 is high level, so that the light-emitting diode of the isolation optocoupler is in an ON state, the isolation optocoupler normally works, and therefore, the output of the isolation optocoupler is low level.
According to the working principle, the state of the high-voltage interlocking loop of the whole vehicle system can be easily detected.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. The high-voltage interlocking detection circuit of the motor controller is characterized by comprising a voltage division circuit consisting of resistors R1 and R2, a Schmidt trigger consisting of a 555 timer and a peripheral circuit thereof, a photoelectric coupler and a pull-up resistor R5, wherein the input end of the 555 timer is connected with a detected element through the voltage division circuit, the output end of the 555 timer is connected with the input end of the photoelectric coupler, and the output end of the photoelectric coupler is connected with a main control chip of the motor controller through the pull-up resistor R5.
2. The motor controller high-voltage interlock detection circuit according to claim 1, wherein one end of the resistor R2 is connected to an external voltage-stabilized power supply, the other end is connected to a detection positive electrode of the detected element, one end of the resistor R1 is connected to a detection negative electrode of the detected element and an input end of the 555 timer, and the other end is grounded.
3. The motor controller high-voltage interlock detection circuit according to claim 1, wherein the output terminal of the 555 timer is connected to the input terminal of the photocoupler through a resistor R3.
4. The motor controller high-voltage interlock detection circuit of claim 3, wherein the model of the photoelectric coupler is ACPL-M61L, the ACPL-M61L photoelectric coupler comprises AN, CATH, VDD and Vo ports, the output end of the 555 timer is connected with a resistor R3 and then is divided into two branches, one branch is directly connected with the AN port of the ACPL-M61L photoelectric coupler, and the other branch is connected with the CATH port of the ACPL-M61L photoelectric coupler through a capacitor C3.
5. The motor controller high-voltage interlock detection circuit according to claim 4, wherein a VDD port of an ACPL-M61L photocoupler is connected to one end of a pull-up resistor R5, a Vo port of the ACPL-M61L photocoupler is connected to the other end of the pull-up resistor R5, and the other branch of the VO port of the ACPL-M61L photocoupler is connected to a general I/O port of a main control chip of the motor controller through a resistor R6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921470531.1U CN211335593U (en) | 2019-09-05 | 2019-09-05 | High-voltage interlocking detection circuit of motor controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921470531.1U CN211335593U (en) | 2019-09-05 | 2019-09-05 | High-voltage interlocking detection circuit of motor controller |
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| CN211335593U true CN211335593U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858850A (en) * | 2021-01-08 | 2021-05-28 | 胜达克半导体科技(上海)有限公司 | High-voltage module testing method for three-phase direct current motor driving chip |
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2019
- 2019-09-05 CN CN201921470531.1U patent/CN211335593U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858850A (en) * | 2021-01-08 | 2021-05-28 | 胜达克半导体科技(上海)有限公司 | High-voltage module testing method for three-phase direct current motor driving chip |
| CN112858850B (en) * | 2021-01-08 | 2024-06-07 | 胜达克半导体科技(上海)股份有限公司 | High-voltage module testing method for three-phase direct-current motor driving chip |
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Effective date of registration: 20221124 Address after: 239000, No. 314, Lingxi Road, Chuzhou City, Anhui Province Patentee after: ANHUI C-E-CARS YANGZI AUTOMOBILE Co.,Ltd. Address before: 230012 building 15, dormitory building, area E, group A, Xinzhan Industrial Logistics Park, Xinzhan District, Hefei City, Anhui Province Patentee before: Hefei Dedian New Energy Vehicle Co.,Ltd. |
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