Innovation has only a beginning, not an end

"Gou Rixin, and new, and new day by day", this is the words engraved on the bath plate by the king of Shang and Tang thousands of years ago to encourage ourselves: the passage of time is like this. Only by constantly changing ourselves can we keep up with the pace of the world.Hepmount has also been demanding itself with the spirit of innovation, pursuing the innovation of innovation, and trying to be a directional and capable leader in the field of industrial automation control.

1. Resonance frequency detection, mechanical resonance suppression method, device and medium

A method, device and medium for detecting resonance frequency and suppressing mechanical resonance: first, input a given speed, sample the current output by the servo motor in real time, then detect whether the servo system has mechanical resonance according to the sampled current and preset logic, and obtain the resonance frequency when the servo system has mechanical resonance.

By sampling the current output by the servo motor to obtain the resonance frequency, the current value can be obtained directly and quickly. Compared with calculating the resonance frequency through the motor speed, the accuracy of the obtained current value is higher, and the accuracy of the obtained resonance frequency is also higher.

2. Communication connection device, programmable logic controller, communication method and product

The invention relates to a communication connection device, a programmable logic controller, a communication method and a product. The main module and the expansion module have an inherent standard interface, and the inherent standard interface includes a chip selection interface, a communication interface and a control interface.

The inherent interface of the main module is connected with the inherent interface of the expansion module through the communication connection device to connect the main module of the programmable logic controller and at least one expansion module.

3.  Frequency converter for film blowing machine and its Mick weight control method

The invention relates to a frequency converter for a film blowing machine and a Mick weight control method thereof. The frequency converter is used to sample the material weight and calculate the weight of the output film, and realize the accurate and stable control of the film thickness.

The above method makes full use of the resources of the frequency converter itself, gives full play to the control and operation advantages of the frequency converter, improves the sampling circuit of the analog input terminal, combines the PID control of the frequency converter with the film control of the film blowing machine, maintains a balance according to the feed volume and output film weight of the film blowing machine system, and realizes the integrated frequency converter of Mick weight control of the film blowing machine.

4.  Flux linkage angle limiting processing, speed sensorless vector control method and system

The invention relates to a flux angle limiting processing and speed sensorless vector control method and system, which obtains the motor frequency of the current sampling period. When the motor frequency is less than the preset threshold frequency, it is necessary to limit the estimated rotor flux angle.

By limiting the rotor flux linkage angle under low torque low frequency, the problems of large fluctuation of motor output torque and abnormal forward and reverse rotation of motor under low torque ultra-low frequency are solved.

5.  Rope breaking detection method and device of rope saw

The invention relates to a rope breaking detection method and device of a rope saw, which relates to the field of mining equipment.

The invention judges whether the rope saw motor is broken by detecting and comparing the output torque current value and the output torque current conversion rate of the rope saw motor, effectively detects the rope breaking fault of the rope saw, and can distinguish the rope breaking state from the cutting completion state, avoid false alarm and improve the production efficiency.

6.  Control method, device, computer equipment and medium of winding frequency converter of wire drawing machine

The invention relates to a control method, device, computer equipment and medium of a winding frequency converter of a wire drawing machine, which comprises: obtaining the actual time of the tension swing rod of the wire drawing machine from the lowest point to the equilibrium point; According to the actual time and preset measurement parameters, the actual winding diameter of the take-up roll of the wire drawing machine is obtained; According to the preset control parameters, actual winding diameter and preset measurement parameters, the actual required control parameters are obtained; The operation of the winding roller is controlled according to the actual required control parameters.

The above methods, devices, computer equipment and media only need to measure the actual time of the tension swing rod from the lowest point to the equilibrium point in the actual working process, and the actual control parameters can be obtained according to the obtained actual time, preset measurement parameters and control parameters. There is no need to input complex mechanical parameters and adjust the preset control parameters. Compared with the control of winding frequency converter in traditional wire drawing machine, it has the advantages of high operation convenience.

7.  Display screen power supply circuit and display device

The utility model discloses a display screen power supply circuit and a display device. When the display screen crashes, the power on control circuit outputs the second control voltage, and the voltage conversion circuit stops working. At this time, the voltage conversion circuit cannot supply power to the display screen, and the display screen is in a power-off state.

Then, the power on control circuit outputs the first control voltage, the voltage conversion circuit returns to the normal working state, converts the received voltage into a preset voltage to supply power to the display screen, and the display screen is automatically powered on again to continue to work normally.

8.  A new PCBA sheet metal mounting structure

The utility model discloses an installation structure for a circuit board, which comprises a first fixed board, a second fixed board and a connecting board.

The installation structure can meet the use requirements of high-power servo driver, improve the space utilization of servo driver, and is suitable for small-scale production.

9.  Grounding device, frequency converter and industrial equipment

The utility model provides a grounding device, a frequency converter and industrial equipment. The grounding device comprises a control module, a driving module and a metal shrapnel.

The control module and the drive module are connected by compressing the metal shrapnel to realize the grounding continuity of the frequency converter, and this connection method reduces the use of screws, simple assembly and higher efficiency.

10.  Frequency converter control keyboard

This design product is used for frequency converter driver control operation. The design key points of the appearance design: the appearance and structure of the product. The picture or photo that can best show the main points of the design: stereogram.