CN111016681A - Active discharge device for electric automobile and using method thereof - Google Patents
Active discharge device for electric automobile and using method thereof Download PDFInfo
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- CN111016681A CN111016681A CN201911361711.0A CN201911361711A CN111016681A CN 111016681 A CN111016681 A CN 111016681A CN 201911361711 A CN201911361711 A CN 201911361711A CN 111016681 A CN111016681 A CN 111016681A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/427—Voltage
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to the field of controlling electric vehicle driving, in particular to an active discharging device for an electric vehicle and a using method thereof, wherein the active discharging device for the electric vehicle comprises a three-phase motor (1), a voltage sensor (21) and a current sensor (22), and is characterized by further comprising a discharging circuit (3), a voltage regulator (41), a torque regulator (42) and an MCU (5), one end of the discharging circuit (3) is connected with a rotor coil of the three-phase motor (1), and the other end of the discharging circuit (3) is connected with the MCU (5) through a signal line.
Description
Technical Field
The invention relates to the field of controlling the driving of an electric vehicle, in particular to an active discharging device for an electric vehicle and a using method thereof.
Background
With the deepening of the concept of energy conservation and emission reduction, electric automobiles are increasingly widely applied. The electric automobile drives the wheels by the motor, and has the advantages of simple structure, convenient operation, low noise, less pollution and the like compared with a fuel automobile. When the electric automobile encounters an emergency situation such as an obstacle collision or an impact, emergency braking is needed to avoid damage expansion, however, the voltage of the existing electric automobile is generally controlled to be below 60V within a specified time by means of a collision signal, and a motor can still keep rotating after the collision signal is received, so that potential safety hazards exist.
Disclosure of Invention
The invention discloses an active discharging device for an electric automobile and a using method thereof, aiming at overcoming the defects of the prior art and providing a control device which is rapid in response, safe and reliable.
The invention achieves the purpose by the following technical scheme:
the utility model provides an initiative discharging device for electric automobile, includes three-phase motor, voltage sensor and current sensor, is equipped with voltage sensor and current sensor on the three-phase motor, characterized by: also comprises a discharge circuit, a voltage regulator, a torque regulator and an MCU,
one end of the discharge circuit is connected with a rotor coil of the three-phase motor, the other end of the discharge circuit is connected with the MCU through a signal wire, the voltage sensor and the current sensor are respectively connected with the MCU through signal wires, and the voltage regulator and the torque regulator are respectively connected with the three-phase motor and the MCU through signal wires.
The active discharging device for the electric automobile is characterized in that: the method is implemented in sequence according to the following steps:
① when the MCU of the electric automobile receives the collision signal, it sends the discharge signal to the discharge circuit immediately;
② MCU judges whether the bus voltage is larger than 60V, if so, executes step ③, otherwise, executes step ④;
③ MCU judges whether the control mode is torque loop, if yes, executing step ⑤, otherwise executing step ⑥;
the moment ring control is to synthesize a given voltage for the stator of the motor, so that the moment corresponding to the current generated after the counter electromotive force of the motor is offset by the given voltage is just balanced with the external load dragged by the motor;
④ MCU starts active short circuit function to make three-phase short circuit of three-phase motor, the residual voltage discharges through three-phase motor rotor coil;
⑤ MCU (2) converts the control mode into voltage ring, the voltage ring control, the voltage of the motor is stabilized at 60V by the voltage control of the outer ring and the moment control of the inner ring;
the MCU stores a voltage set value V0 of the three-phase motor and a torque set value M0 of the whole vehicle, the MCU (2) receives a voltage sampling value V measured by the voltage sensor, the MCU also receives a current sampling value measured by the current sensor and converts the current sampling value into a torque estimated value M,
the MCU regulates the voltage of the three-phase motor through the voltage regulator according to the difference between the voltage given value V0 and the voltage sampling value V, the MCU regulates the torque of the three-phase motor through the torque regulator according to the difference between the vehicle torque given value M0 and the torque estimated value M,
the MCU (2) keeps the three-phase motor at a given voltage of 60V by adjusting voltage and torque;
⑥ stopping the discharge until the three-phase motor stops;
according to the control requirement of the ASC (all active short control), the end condition of the ASC is that the motor is stopped, and if the motor is running, the ASC is always in the ASC state.
The invention releases residual voltage through the motor, has the advantages of quick and thorough discharge, has the reaction time not more than 0.5sec, can reduce the voltage to below 60V within 2sec, and has the advantages of quick reaction, safety and reliability.
Drawings
FIG. 1 is a schematic connection diagram of the present invention;
FIG. 2 is a schematic flow chart of the present invention in use;
fig. 3 is a schematic flow chart of voltage loop control in use of the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
An active discharge device for an electric automobile comprises a three-phase motor 1, a voltage sensor 21, a current sensor 22, a discharge circuit 3, a voltage regulator 41, a torque regulator 42 and an MCU5, and is specifically structured as shown in FIG. 1:
the three-phase motor 1 is provided with a voltage sensor 21 and a current sensor 22,
one end of the discharge circuit 3 is connected to the rotor coil of the three-phase motor 1, the other end of the discharge circuit 3 is connected to the MCU5 through a signal line, the voltage sensor 21 and the current sensor 22 are connected to the MCU5 through signal lines, and the voltage regulator 41 and the torque regulator 42 are connected to the three-phase motor 1 and the MCU5 through signal lines.
In use, the present embodiment is as shown in fig. 2: the method is implemented in sequence according to the following steps:
① when the MCU5 of the electric automobile receives the collision signal, the electric automobile immediately sends a discharge signal to the discharge circuit 3;
② MCU5 judges whether the bus voltage is larger than 60V, if so, the ③ step is executed, otherwise, the ④ step is executed;
③ MCU5 judges whether the control mode is a torque loop, if yes, step ⑤ is executed, otherwise step ⑥ is executed;
the moment ring control is to synthesize a given voltage for the stator of the motor, so that the moment corresponding to the current generated after the counter electromotive force of the motor is offset by the given voltage is just balanced with the external load dragged by the motor;
④ MCU5 starts an active short circuit function to short-circuit the three phases of the three-phase motor 1, and the residual voltage is discharged through the rotor coil of the three-phase motor 1;
⑤ MCU2 converts the control mode into a voltage ring, the voltage ring control is as shown in figure 3, the voltage of the motor is stabilized at 60V by the voltage control of the outer ring and the torque control of the inner ring:
the MCU5 stores a voltage set value V0 of the three-phase motor 1 and a torque set value M0 of the whole vehicle, the MCU2 receives a voltage sampling value V measured by the voltage sensor 21, the MCU5 also receives a current sampling value measured by the current sensor 22 and converts the current sampling value into a torque estimated value M,
the MCU5 adjusts the voltage of the three-phase motor 1 through the voltage regulator 41 according to the difference between the voltage given value V0 and the voltage sampling value V, the MCU5 adjusts the torque of the three-phase motor 1 through the torque regulator 42 according to the difference between the vehicle torque given value M0 and the torque estimated value M,
the MCU2 keeps the three-phase motor 1 at a given voltage of 60V by adjusting the voltage and torque;
⑥ until the three-phase motor 1 stops rotating and the discharge ends;
according to the control requirement of the ASC (all active short control), the end condition of the ASC is that the motor is stopped, and if the motor is running, the ASC is always in the ASC state.
Claims (2)
1. The utility model provides an initiative discharge device for electric automobile, includes three-phase motor (1), voltage sensor (21) and current sensor (22), is equipped with voltage sensor (21) and current sensor (22) on three-phase motor (1), characterized by: also comprises a discharge circuit (3), a voltage regulator (41), a moment regulator (42) and an MCU (5),
one end of the discharge circuit (3) is connected with a rotor coil of the three-phase motor (1), the other end of the discharge circuit (3) is connected with the MCU (5) through a signal line, the voltage sensor (21) and the current sensor (22) are respectively connected with the MCU (5) through signal lines, and the voltage regulator (41) and the torque regulator (42) are respectively connected with the three-phase motor (1) and the MCU (5) through signal lines.
2. The active discharge device for electric vehicles according to claim 1, wherein: the method is implemented in sequence according to the following steps:
① when the MCU (5) of the electric automobile receives the collision signal, it immediately sends a discharge signal to the discharge circuit (3);
② MCU (5) judges whether bus voltage is larger than 60V, if so, executing step ③, otherwise, executing step ④;
③ MCU (5) judges whether the control mode is torque loop, if yes, executing step ⑤, otherwise executing step ⑥;
the moment ring control is to synthesize a given voltage for the stator of the motor, so that the moment corresponding to the current generated after the counter electromotive force of the motor is offset by the given voltage is just balanced with the external load dragged by the motor;
④ the MCU (5) starts the active short circuit function to make the three phases of the three-phase motor (1) short circuit, the residual voltage discharges through the rotor coil of the three-phase motor (1);
⑤ MCU (2) converts the control mode into voltage ring, the voltage ring control, the voltage of the motor is stabilized at 60V by the voltage control of the outer ring and the moment control of the inner ring;
the MCU (5) stores a voltage set value V0 of the three-phase motor (1) and a torque set value M0 of the whole vehicle, the MCU (2) receives a voltage sampling value V measured by the voltage sensor (21), the MCU (5) also receives a current sampling value measured by the current sensor (22) and converts the current sampling value into a torque estimated value M,
the MCU (5) adjusts the voltage of the three-phase motor (1) through the voltage regulator (41) according to the difference between the voltage given value V0 and the voltage sampling value V, the MCU (5) adjusts the torque of the three-phase motor (1) through the torque regulator (42) according to the difference between the vehicle torque given value M0 and the torque estimated value M,
the MCU (2) enables the three-phase motor (1) to be kept at a given voltage of 60V by adjusting voltage and torque;
⑥ until the three-phase motor (1) stops rotating, and the discharge is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911361711.0A CN111016681B (en) | 2019-12-25 | 2019-12-25 | Active discharging device for electric automobile and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911361711.0A CN111016681B (en) | 2019-12-25 | 2019-12-25 | Active discharging device for electric automobile and using method thereof |
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| Publication Number | Publication Date |
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| CN111016681A true CN111016681A (en) | 2020-04-17 |
| CN111016681B CN111016681B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911361711.0A Active CN111016681B (en) | 2019-12-25 | 2019-12-25 | Active discharging device for electric automobile and using method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354556A (en) * | 2001-11-28 | 2002-06-19 | 深圳安圣电气有限公司 | Method for preventing bus voltage from excessing |
| JP2005020952A (en) * | 2003-06-27 | 2005-01-20 | Toyota Motor Corp | Vehicle control device |
| CN102897114A (en) * | 2011-07-28 | 2013-01-30 | 现代自动车株式会社 | Discharge technique for residual high voltage in hybrid vehicle and method thereof |
| CN103660996A (en) * | 2012-09-19 | 2014-03-26 | 福特全球技术公司 | Vehicle electric machine control strategy |
| CN103889769A (en) * | 2011-10-18 | 2014-06-25 | 丰田自动车株式会社 | Motor vehicle having traction motor |
| CN106183820A (en) * | 2014-08-28 | 2016-12-07 | 株式会社京滨 | Discharge control device |
| CN108123428A (en) * | 2016-11-29 | 2018-06-05 | 长城汽车股份有限公司 | Voltage drainage method, system and the vehicle of electric machine controller |
| CN108482160A (en) * | 2018-04-17 | 2018-09-04 | 浙江吉利控股集团有限公司 | A kind of repid discharge method, apparatus and system |
-
2019
- 2019-12-25 CN CN201911361711.0A patent/CN111016681B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354556A (en) * | 2001-11-28 | 2002-06-19 | 深圳安圣电气有限公司 | Method for preventing bus voltage from excessing |
| JP2005020952A (en) * | 2003-06-27 | 2005-01-20 | Toyota Motor Corp | Vehicle control device |
| CN102897114A (en) * | 2011-07-28 | 2013-01-30 | 现代自动车株式会社 | Discharge technique for residual high voltage in hybrid vehicle and method thereof |
| CN103889769A (en) * | 2011-10-18 | 2014-06-25 | 丰田自动车株式会社 | Motor vehicle having traction motor |
| CN103660996A (en) * | 2012-09-19 | 2014-03-26 | 福特全球技术公司 | Vehicle electric machine control strategy |
| CN106183820A (en) * | 2014-08-28 | 2016-12-07 | 株式会社京滨 | Discharge control device |
| CN108123428A (en) * | 2016-11-29 | 2018-06-05 | 长城汽车股份有限公司 | Voltage drainage method, system and the vehicle of electric machine controller |
| CN108482160A (en) * | 2018-04-17 | 2018-09-04 | 浙江吉利控股集团有限公司 | A kind of repid discharge method, apparatus and system |
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| CN111016681B (en) | 2023-04-18 |
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