Ground wire short circuit protection circuit, automobile motor controller and electric automobile

Abstract

The invention provides a ground wire short-circuit protection circuit, a ground wire is connected between a sensor and a controller, the protection circuit comprises an execution module and a control module, the execution module is connected in series in the ground wire, and the control module is connected with the ground wire and used for detecting whether the voltage value of the ground wire is abnormal or not. The control module is connected with the control end of the execution module and used for controlling on-off of the execution module, if the voltage value of the ground wire is abnormal, the control module disconnects the execution module to disconnect the ground wire, and if the voltage value of the ground wire is normal, the control module connects the execution module to connect the ground wire. According to the invention, the problem that wrong trigger protection is easy to cause due to large resistance change of the thermistor along with temperature change is solved. The invention further provides an automobile motor controller and an electric automobile.

Description

technical field

[0001] The invention relates to the technical field of circuits, in particular to a ground wire short-circuit protection circuit, an automobile motor controller and an electric vehicle. Background technique

[0002] In the traditional signal acquisition system, the controller generally provides power to the external sensors, and collects feedback signals from the sensors to achieve the purpose of measurement. To collect feedback signals, a common reference ground wire is required between the sensor and the controller. Generally, the common reference ground wire is the power ground wire. The power supply ground wire of the sensor and the reference ground wire of the controller are equipotential bonding. In the event of a short circuit in the sensor circuit, etc., excessive current may flow through the sensor supply ground. The fault state of the circuit can be detected by detecting the voltage value of the power supply ground terminal, and then measures are ...

Examples

Embodiment Construction

[0025] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0026] refer to figure 1 , this embodiment provides a ground wire short-circuit protection circuit, wherein the ground wire is connected between the sensor 1 and the controller 2, the protection circuit includes an execution module 3 and a control module 4, and the execution module 3 is connected in series in the ground wire...

technical field

[0001] The invention relates to the technical field of circuits, in particular to a ground wire short-circuit protection circuit, an automobile motor controller and an electric vehicle. Background technique

[0002] In the traditional signal acquisition system, the controller generally provides power to the external sensors, and collects feedback signals from the sensors to achieve the purpose of measurement. To collect feedback signals, a common reference ground wire is required between the sensor and the controller. Generally, the common reference ground wire is the power ground wire. The power supply ground wire of the sensor and the reference ground wire of the controller are equipotential bonding. In the event of a short circuit in the sensor circuit, etc., excessive current may flow through the sensor supply ground. The fault state of the circuit can be detected by detecting the voltage value of the power supply ground terminal, and then measures are ...

Examples

Embodiment Construction

[0025] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0026] refer to figure 1 , this embodiment provides a ground wire short-circuit protection circuit, wherein the ground wire is connected between the sensor 1 and the controller 2, the protection circuit includes an execution module 3 and a control module 4, and the execution module 3 is connected in series in the ground wire...

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