Device for safely turning off double-winding motor, application circuit and control method
A motor safety and double-winding technology, which is applied in motor control, AC motor control, electrical components, etc., can solve problems affecting equipment, personnel safety, hindering rotor rotation, and steering failure, so as to improve reliability and avoid motor lock. dead, to avoid the effect of backfeeding
Pending Publication Date: 2021-03-12
丽水方德智驱应用技术研究院有限公司
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Problems solved by technology
[0003] The electromagnetic coupling between the double windings is similar to the principle of a transformer. When one winding is working, the current will induce a voltage in the other path; when the voltage exceeds a certain value, it can be reversely rectified through the freewheeling diode to charge the battery, potentially generating heat. And potentially affect the safety of equipment and personnel
In addition, in a double-winding motor, when a short circuit occurs in one winding, the induced voltage forms a loop, hindering the rotation of the rotor, or even locking the motor, making the steering unable to operate.
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] like Figure 1 to Figure 5 As shown, this embodiment provides a circuit for safely shutting down a double-winding motor, including a battery, a controller, a three-phase parallel switch, a double-winding motor and devices, such as Figure 4 As shown, when the stator windings of the double-winding motor form a star connection, the device includes three switches, and each switch has three terminals, which are respectively No. The connected No. 2 terminal and the No. 3 terminal used to connect with the control circuit, the No. 1 terminals of the three switches are connected to each other; correspondingly, when the stator windings of the double-winding motor are connected in a delta shape, the device includes three switches , each switch has three terminals, which are terminal No. 1, terminal No. 2, and terminal No. 3 used to connect with the contro...
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The invention relates to a device for safely turning off a double-winding motor, an application circuit and a control method. A device for safely turning off a double-winding motor comprises three switches, each switch is provided with three wiring terminals, namely a first terminal, a second terminal used for being connected with a certain phase in three phases of the motor and a third terminal used for being connected with a control circuit, and the first terminals of the three switches are connected with one another. According to the device, mutual on-off of windings in the double-winding motor can be controlled, the control flexibility of the double-winding motor is improved, and motor locking during motor phase short circuit is avoided. The device is adopted in the circuit, the three-phase parallel switch is further arranged between the controller and the motor, reverse flowing of induced voltage is avoided, under the topology, a loop can be formed only when the two ends of the winding are short-circuited, the possibility of the situation is extremely low, and the reliability of the current cut-off function is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a device, an application circuit and a control method for safely shutting down a double-winding motor. Background technique [0002] Vehicle steering system is closely related to driving safety. The steering system fails, and the safety risk is extremely high. Replacing single-winding motors with dual-motors and double-winding motors is a solution that is increasingly used in the industry. During normal driving, the main motor or winding is used as the main steering circuit, and the auxiliary motor or winding is used as the emergency safety backup circuit; when the main circuit fails or fails, the auxiliary drive circuit is connected in time to ensure the operation of the steering system, thereby ensuring driving safety. In comparison, the double-winding motor has more advantages in cost and volume due to the shared rotor and housing, but at the same time, the...
Claims
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IPC IPC(8): H02P29/028H02P25/22B62D5/04
CPCH02P29/028H02P25/22B62D5/0487
Inventor 游韬曹艺程德祥夏兵
Owner 丽水方德智驱应用技术研究院有限公司