CN-224218305-U - Motor control circuit for preventing electric interference

Abstract

The motor control circuit for preventing the electric interference comprises a wire inlet switch QF, an intermediate relay HJ, a button HA, a power end anode, a power end cathode, a relay TJ, a power end anode, a button HA, a time relay KT, a relay T and a time relay KT, wherein the other end of the wire inlet switch QF is connected with the conducting end of the contactor KM, the conducting end of the contactor KM is connected with the motor M through the coil end of the thermal relay KH, the other end of the contactor KM is sequentially connected with the L through the normally-closed end of the thermal relay KH, the normally-closed end of the intermediate relay TJ and the normally-open end of the time relay KT, the normally-open end of the time relay KT is connected with the normally-open end of the contactor KM in parallel, the coil end of the intermediate relay HJ is connected with the coil end of the time relay KT in parallel, one end of the coil end of the intermediate relay HJ is connected with the power end anode, the other end of the intermediate relay HJ is respectively connected with the power end anode through the button HA and the conducting end of the contactor KM, and the other end of the coil end of the intermediate relay TJ is sequentially connected with the power end anode through the button TA.

Inventors

• YUAN KAICHUN
• DAI WEIKUN
• XU ZEFANG
• HUANG XUELIANG
• ZHANG QI

Assignees

• 江西泰豪智能电力科技有限公司

Dates

Publication Date

20260508

Application Date

20250530

Claims (5)

1. 1. The motor control circuit is characterized by comprising a wire inlet switch QF, wherein one end of the wire inlet switch QF receives voltage, the other end of the wire inlet switch QF is connected with a conducting end of a contactor KM, and the conducting end of the contactor KM is connected with a motor M through a coil end of a thermal relay KH; One end of the coil end of the contactor KM is connected with N, and the other end of the coil end of the contactor KM is connected with L through the normally closed end of the thermal relay KH, the normally closed end of the intermediate relay TJ and the normally open end of the time relay KT in sequence, wherein the normally open end of the time relay KT is connected with the normally open end of the contactor KM in parallel; The relay also comprises an intermediate relay HJ, the coil end of the intermediate relay HJ is connected with the coil end of the time relay KT in parallel, one end of a coil end of the intermediate relay HJ is connected with a negative electrode of a power end, and the other end of the coil end of the intermediate relay HJ is connected with a positive electrode of the power end through a button HA and a conducting end of a contactor KM respectively; The coil end one end of intermediate relay TJ is connected with the power end negative pole, and the other end passes through button TA and is connected with the power end positive pole, and the other end still loops through the normally open end of intermediate relay TJ and the normally open end of time relay KT and is connected with the power end positive pole.
2. 2. The motor control circuit for preventing electric interference as set forth in claim 1, wherein the normally open end of the intermediate relay HJ is connected to the positive electrode of the power supply and the other end is connected to the negative electrode of the power supply via the indicator lamp HD.
3. 3. The motor control circuit for preventing electric interference as set forth in claim 2, wherein the normally closed end of the intermediate relay HJ is connected at one end to the positive electrode of the power supply and at the other end to the negative electrode of the power supply via the indicator lamp LD.
4. 4. The motor control circuit for preventing electric interference as set forth in claim 1, further comprising a fuse FU connected to the L.
5. 5. The motor control circuit for preventing electric interference according to claim 3, further comprising a fuse FU1 and a fuse FU2 connected to the power source terminal.

Description

Motor control circuit for preventing electric interference Technical Field The utility model relates to the field of power systems, in particular to a motor control circuit for preventing electric interference. Background Electrical interference is a common phenomenon in electrical power systems, often manifested as a momentary drop or short interruption of the grid voltage, but then returning to normal quickly. The prior proposal for solving the problem of electricity interference mainly uses an anti-electricity interference device, and uses a special module to keep and control the contactor so as to enhance the resistance of the circuit to the electricity interference. The problem of electricity interference can be effectively solved by using the electricity interference prevention device, but the electricity interference prevention device can increase the enterprise cost, especially when the number of the motors is more. Disclosure of utility model In order to solve the problems, the technical scheme provides a motor control circuit for preventing electric interference. In order to achieve the above purpose, the technical scheme is as follows: The motor control circuit for preventing the electric interference comprises an incoming line switch QF, wherein one end of the incoming line switch QF receives voltage, the other end of the incoming line switch QF is connected with a conducting end of a contactor KM, and the conducting end of the contactor KM is connected with a motor M through a coil end of a thermal relay KH; One end of the coil end of the contactor KM is connected with N, and the other end of the coil end of the contactor KM is connected with L through the normally closed end of the thermal relay KH, the normally closed end of the intermediate relay TJ and the normally open end of the time relay KT in sequence, wherein the normally open end of the time relay KT is connected with the normally open end of the contactor KM in parallel; The relay also comprises an intermediate relay HJ, the coil end of the intermediate relay HJ is connected with the coil end of the time relay KT in parallel, one end of a coil end of the intermediate relay HJ is connected with a negative electrode of a power end, and the other end of the coil end of the intermediate relay HJ is connected with a positive electrode of the power end through a button HA and a conducting end of a contactor KM respectively; The coil end one end of intermediate relay TJ is connected with the power end negative pole, and the other end passes through button TA and is connected with the power end positive pole, and the other end still loops through the normally open end of intermediate relay TJ and the normally open end of time relay KT and is connected with the power end positive pole. In some embodiments, one end of the normally open end of the intermediate relay HJ is connected to the positive electrode of the power supply, and the other end is connected to the negative electrode of the power supply through the indicator lamp HD. In some embodiments, one end of the normally closed end of the intermediate relay HJ is connected to the positive electrode of the power supply, and the other end is connected to the negative electrode of the power supply through the indicator lamp LD. In some embodiments, a fuse FU connected to L is also included. In some embodiments, a fuse FU1 connected to the power supply terminal and a fuse FU2 are also included. The application has the beneficial effects that: the application can effectively solve the problem of electricity interference through the control of the time relay, prevent production accidents, avoid unnecessary economic loss and effectively save cost. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. FIG. 1 is a schematic diagram of a main loop structure according to an embodiment of the present utility model; FIG. 2 is a schematic diagram of a circuit structure according to an embodiment of the utility model; fig. 3 is a schematic diagram of a circuit structure according to an embodiment of the utility model. Detailed Description In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. Referring to fig. 1-3, an anti-interference motor control circuit comprises a wire inlet switch QF, wherein one end of the wire inlet switch QF receives voltage, the other end of the wire inlet switch QF is connected with a conducting end of a contactor KM, and the conducting end of the conta