Protection circuit and circuit protection method applied to protection circuit
A technology for protecting circuits and starting circuits, which is applied in emergency protection circuit devices, circuit devices, and automatic disconnection emergency protection devices, etc., can solve the problems of high failure rate of the power system of excavators and bad usage habits.
Pending Publication Date: 2021-10-22
SANY HEAVY MACHINERY
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[0004] Embodiments of the present invention provide a protection circuit and a circuit protection method applied to the protection circuit, which are used to solve the defect in the prior art that the power system of the excavator has a high failure rate due to bad usage habits of users, and realize adaptability Various usage habits of users
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[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0049] Combine below Figure 1 to Figure 3 The protection circuit of the embodiment of the present invention is described.
[0050] An embodiment of the present invention provides a protection circuit, which is applied to electric working machines, such as hydraulic excavators, electric excavators, electric hydraulic excavators, etc., the circuit...
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The embodiment of the invention provides a protection circuit and a circuit protection method applied to the protection circuit. The protection circuit comprises a starting module, a power-on circuit, a starting circuit, a control module and a motor, wherein the starting module is electrically connected with the control module, the control module is electrically connected with the power-on circuit and the starting circuit, the starting circuit is electrically connected with the motor, the starting module is used for providing electric signals for the control module, the control module is used for outputting a first high-level signal or outputting a first low-level signal to the power-on circuit, the power-on circuit is used for powering on electric working machinery or powering off the electric working machinery, the control module is also used for outputting a second high-level signal or outputting a second low-level signalto the starting circuit, and the starting circuit is used for starting the motor or closing the motor. The protection circuit is used for overcoming the defect that in the prior art, the failure rate of a power system of an excavator is high due to poor use habits of a user.
Description
technical field [0001] The invention relates to the technical field of protection circuits, in particular to a protection circuit and a circuit protection method applied to the protection circuit. Background technique [0002] Hydraulic excavator is a kind of construction machinery widely used in construction fields such as urban infrastructure construction. With the increase of national infrastructure construction and the increase of energy demand such as minerals, hydraulic excavator has become a hot construction machinery. Among them, the power system of the electro-hydraulic excavator is the power source of the entire excavator. Whether the power system can operate normally directly affects the operation of the whole excavator. [0003] However, due to bad usage habits of users, the failure rate of the power system of the excavator is relatively high. Therefore, how to make the power system of the excavator adapt to various usage habits of users is an urgent problem to b...
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IPC IPC(8): H02H3/00H02H7/08
CPCH02H3/00H02H7/08
Inventor 张鑫明巧红崔会喜
Owner SANY HEAVY MACHINERY