CN214412622U - Device and circuit for safely switching off double-winding motor - Google Patents
Device and circuit for safely switching off double-winding motor Download PDFInfo
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- CN214412622U CN214412622U CN202022547917.7U CN202022547917U CN214412622U CN 214412622 U CN214412622 U CN 214412622U CN 202022547917 U CN202022547917 U CN 202022547917U CN 214412622 U CN214412622 U CN 214412622U
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Abstract
The utility model relates to a device and circuit that duplex winding motor safety turn-off. The utility model provides a device that two winding motor safety shut-off, includes three switch, and every switch all has three binding post, is 1 number terminal respectively, is used for the 2 number terminals that link to each other in the three-phase of motor and is used for the 3 number terminals that link to each other with control scheme, and 1 number terminal interconnect of three switch. The utility model discloses a device makes and to control mutual break-make between the inside winding of doubly-wound motor, has improved the flexibility of doubly-wound motor control, and the motor lock when having avoided the motor looks short circuit. The utility model discloses a circuit has adopted foretell device, and has still set up three-phase parallel switch between controller and motor, has avoided induced voltage's anti-irritating, and under this kind of topology, only the short circuit takes place at the winding both ends, just probably forms the return circuit, and this kind of condition possibility is minimum, has greatly promoted the reliability of current cutting-off function.
Description
Technical Field
The utility model belongs to the technical field of motor control, specifically speaking relates to a device and circuit that duplex winding motor safety was turn-offed.
Background
The vehicle steering system is closely related to driving safety. The steering system is invalid, and the safety risk is extremely high. The replacement of a single-winding motor into a double-motor and double-winding motor is a solution which is increasingly widely applied in the industry. When the vehicle runs normally, the main motor or the winding is used as a steering main loop, and the auxiliary motor or the winding is used as an emergency safety backup loop; when the main loop breaks down or fails, the auxiliary driving loop is connected in time to ensure the operation of the steering system and further ensure the driving safety. Compared with the prior art, the double-winding motor has more advantages in cost and volume because the double-winding motor shares a rotor and a shell, and the like, but the double-winding scheme has the problems to be solved, and mainly reflects the related problems caused by double-winding electromagnetic and mechanical coupling.
The double windings are electromagnetically coupled, similar to the transformer principle, when one winding works, current can induce voltage on the other path; when the voltage exceeds a certain value, the storage battery can be charged through reverse rectification of the freewheeling diode, and the storage battery can potentially generate heat and potentially affect the safety of equipment and personnel. In addition, in the double-winding motor, when one winding is in short circuit, induced voltage forms a loop to block the rotation of the rotor and even lock the motor, so that the steering cannot be operated.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a first purpose provides a device that double winding motor safety was turn-offed, and this device can make the inside winding disconnection of double winding motor or closed, the utility model discloses a second purpose provides a circuit that double winding motor safety was turn-offed, and this circuit can effectively avoid the motor locking, improves the security performance. In order to realize the purpose of the first utility model, the utility model adopts the following technical scheme:
the utility model provides a device that two winding motor safety shut-off, includes three switch, and every switch all has three binding post, is 1 number terminal respectively, is used for the 2 number terminals that link to each other in the three-phase of motor and is used for the 3 number terminals that link to each other with control scheme, and 1 number terminal interconnect of three switch.
The utility model provides a device that two winding motor safety shut-off, includes three switch, every switch all has three binding post, is No. 1 terminal, No. 2 terminal respectively and is used for No. 3 terminals that link to each other with control scheme, establishes ties the three-phase of motor through No. 1 terminal, No. 2 terminal of three switch.
As a preferable scheme: the three switches are all relay switches, MOS switches, IGBT switches, SiC switches or GaN switches.
In order to realize the purpose of the second utility model, the utility model adopts the following technical scheme:
the utility model provides a circuit that two winding motor safety was shut off, includes battery, controller, three-phase parallel switch, two winding motor and as above the device, the two winding motor is including main stator winding of driving and the supplementary stator winding of driving, and main stator winding of driving and the supplementary stator winding of driving are located main circuit of driving and the supplementary circuit of driving respectively, be connected with the device on one side of main stator winding of driving and the supplementary stator winding of driving respectively, main stator winding of driving and the supplementary opposite side of driving the stator winding are connected with three-phase parallel switch respectively, and the controller in every return circuit all includes control circuit and power circuit, control circuit drive three-phase parallel switch with the device, two sets of batteries are main circuit of driving and the supplementary power supply of driving respectively.
As a preferable scheme: the power circuit is controlled by the control circuit, converts direct current into alternating current, and drives the motor shaft after passing through the main drive stator winding or the auxiliary drive stator winding.
As a preferable scheme: the control circuit is also provided with sensors for monitoring the states of the respective controllers and the motor windings.
As a preferable scheme: the power circuit adopts a motor drive bridge circuit formed by six groups of MOSFETs.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a device makes and to control mutual break-make between the inside winding of doubly-wound motor, has improved the flexibility of doubly-wound motor control, and the motor lock when having avoided the motor looks short circuit. The utility model discloses a circuit has adopted foretell device, and has still set up three-phase parallel switch between controller and motor, has avoided induced voltage's anti-irritating, and under this kind of topology, only the short circuit takes place at the winding both ends, just probably forms the return circuit, and this kind of condition possibility is minimum, has greatly promoted the reliability of current cutting-off function.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is an overall schematic diagram of the circuit of the present invention;
fig. 2 is a schematic diagram of a control method of the circuit for the safety shutdown of the double-winding motor of the present invention;
fig. 3 is a schematic diagram of the terminal connections of the device of the present invention;
fig. 4 is a schematic diagram of a specific structure of the device of the present invention;
fig. 5 is a schematic diagram of the connection of the power circuit, three-phase parallel switch, main drive stator winding and device of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 1 to 5, the present embodiment provides a circuit for safely turning off a double-winding motor, which includes a storage battery, a controller, three-phase parallel switches, a double-winding motor and a device, as shown in fig. 4, when a stator of the double-winding motor is wound to form a star connection, the device includes three switches, each switch has three connection terminals, which are respectively a terminal No. 1, a terminal No. 2 for connecting with a certain phase of the three phases of the motor, and a terminal No. 3 for connecting with a control circuit, and the terminals No. 1 of the three switches are connected with each other; when the stator of the double-winding motor is wound to form a triangular connection, the device comprises three switches, each switch is provided with three wiring terminals which are respectively a No. 1 terminal, a No. 2 terminal and a No. 3 terminal connected with a control circuit, and three phases of the motor are connected in series through the No. 1 terminal and the No. 2 terminal of the three switches. Three switches of the device are all relay switches, MOS switches, IGBT switches, SiC switches or GaN switches.
The double-winding motor comprises a main drive stator winding and an auxiliary drive stator winding, the main drive stator winding and the auxiliary drive stator winding are respectively located in a main drive loop and an auxiliary drive loop, one side of the main drive stator winding and one side of the auxiliary drive stator winding are respectively connected with a device, the other side of the main drive stator winding and the other side of the auxiliary drive stator winding are respectively connected with a three-phase parallel switch, a controller in each loop comprises a control circuit and a power circuit, the control circuit drives the three-phase parallel switch and the devices, and two groups of storage batteries respectively supply power for the main drive loop and the auxiliary drive loop.
The power circuit is controlled by the control circuit, converts direct current into alternating current, and drives the motor shaft after passing through the main drive stator winding or the auxiliary drive stator winding. The control circuit is also provided with sensors for monitoring the states of the respective controllers and the motor windings. The power circuit adopts a motor drive bridge circuit formed by six groups of MOSFETs.
As shown in fig. 2, a method for controlling a circuit for safely turning off a dual-winding motor includes the following steps
Firstly, starting: starting two groups of storage batteries, and respectively electrifying the main drive circuit and the auxiliary drive circuit for operation;
secondly, self-checking: the main drive loop and the auxiliary drive loop respectively carry out self-checking,
if the main drive circuit has no fault, entering a normal working condition mode; in a normal working condition mode, the three-phase parallel switch and the device on the main drive loop are closed, and the control circuit in the main drive loop drives the corresponding power circuit so as to drive the main drive stator winding to work and respond to a signal of the vehicle controller to steer; the three-phase parallel switch and the device in the auxiliary driving loop are disconnected, and the controller and the auxiliary driving stator winding in the auxiliary driving loop do not work; a control circuit of the main drive loop simultaneously monitors whether the main drive loop has a fault; the control circuit of the auxiliary drive loop is communicated with the controller of the main drive loop;
if the main drive circuit is in fault, entering an emergency working condition mode; and in the emergency working condition mode, the three-phase parallel switch and the device on the main drive loop are both switched off, and the controller on the auxiliary drive loop is informed, controls the three-phase parallel switch and the device to be switched on, drives the auxiliary drive stator winding to work, and responds to the signal of the whole vehicle controller to steer.
As a preferred scheme, in the self-checking step, if the auxiliary drive circuit fails and the main drive circuit does not have a fault, the vehicle enters a normal working condition mode, and fault information is reported to the vehicle controller.
In conclusion, as shown in fig. 1, the switches K1 and K3 or K2 and K4 work in a linked manner, so that the physical isolation of electricity and electromagnetism is ensured, the electric and magnetic fields of the main and auxiliary driving windings are not coupled, and unexpected states such as current backflow and locking cannot occur.
Claims (7)
1. A device for safely switching off a double-winding motor is characterized in that: including three switch, every switch all has three binding post, is 1 number terminal respectively, is used for the No. 2 terminal that links to each other in the three-phase of motor and is used for 3 terminals that link to each other with control scheme, No. 1 terminal interconnect of three switch.
2. A device for safely shutting down a two-winding motor according to claim 1, wherein: the three switches are all relay switches, MOS switches, IGBT switches, SiC switches or GaN switches.
3. A device for safely switching off a double-winding motor is characterized in that: including three switch, every switch all has three binding post, is No. 1 terminal, No. 2 terminal respectively and is used for the No. 3 terminal that links to each other with control scheme, establishes ties the three-phase of motor through No. 1 terminal, No. 2 terminal of three switch.
4. A circuit that two winding motor safety shut off which characterized in that: the double-winding motor comprises a storage battery, a controller, a three-phase parallel switch, a double-winding motor and a device according to any one of claims 1 to 3, wherein the double-winding motor comprises a main driving stator winding and an auxiliary driving stator winding, the main driving stator winding and the auxiliary driving stator winding are respectively positioned in a main driving loop and an auxiliary driving loop, the device is respectively connected to one side of the main driving stator winding and one side of the auxiliary driving stator winding, the other side of the main driving stator winding and the other side of the auxiliary driving stator winding are respectively connected with the three-phase parallel switch, the controller in each loop comprises a control circuit and a power circuit, the control circuit drives the three-phase parallel switch and the device, and the two groups of storage batteries respectively supply power for the main driving loop and the auxiliary driving loop.
5. A circuit for safely shutting down a two-winding motor according to claim 4, wherein: the power circuit is controlled by the control circuit, converts direct current into alternating current, and drives the motor shaft after passing through the main drive stator winding or the auxiliary drive stator winding.
6. A circuit for safely shutting down a two-winding motor according to claim 4, wherein: the control circuit is also provided with sensors for monitoring the states of the respective controllers and the motor windings.
7. A circuit for safely shutting down a two-winding motor according to claim 4, wherein: the power circuit adopts a motor drive bridge circuit formed by six groups of MOSFETs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022547917.7U CN214412622U (en) | 2020-11-06 | 2020-11-06 | Device and circuit for safely switching off double-winding motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022547917.7U CN214412622U (en) | 2020-11-06 | 2020-11-06 | Device and circuit for safely switching off double-winding motor |
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| Publication Number | Publication Date |
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| CN214412622U true CN214412622U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022547917.7U Active CN214412622U (en) | 2020-11-06 | 2020-11-06 | Device and circuit for safely switching off double-winding motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491329A (en) * | 2020-11-06 | 2021-03-12 | 丽水方德智驱应用技术研究院有限公司 | Device for safely switching off double-winding motor, application circuit and control method |
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- 2020-11-06 CN CN202022547917.7U patent/CN214412622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491329A (en) * | 2020-11-06 | 2021-03-12 | 丽水方德智驱应用技术研究院有限公司 | Device for safely switching off double-winding motor, application circuit and control method |
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