8results about How to "Increase margin" patented technology

The excavating device of the present invention includes a lower arm having a width gradually increasing from one end toward the other end, a fixing hole formed in the outer circumferential surface at the other end, a rotary arm support in a disc shape located on the other end of the lower arm and fixed to the lower arm, an upper arm located on and fixed to the rotary arm support, a guide hole formed in the outer circumferential surface of the rotary arm support, a center joint surrounded by the lower arm, the rotary arm support and the upper arm and exposed to the outside through the fixing hole of the lower arm and the guide hole of the upper arm, and a slip ring inserted into or separated from the center joint through the guide hole of the upper arm.

The application provides a chip junction temperature estimation method, device and equipment of a power module and a medium, the method comprises the following steps: acquiring physical parameters, reference point temperature and loss power of each chip in the power module; establishing a simulation model based on the physical parameters; applying the loss power to the simulation power module in the simulation model to obtain simulation junction temperature data; obtaining a thermal impedance matrix based on the simulation junction temperature data, the loss power and the reference point temperature; establishing a thermal network model for estimating the chip junction temperature; comparing the output result of the thermal network model with the actual junction temperature result of the test to correct the thermal impedance matrix; predicting the life of the power module to obtain the aging relationship between the life and the thermal impedance matrix; and estimating the junction temperature of the chip of the power module with different life cycles according to the aging relationship; the reliability and stability of the chip junction temperature estimation are improved, the accuracy of the chip junction temperature estimation is ensured, and the automobile can be safely and reliably driven.

The utility model provides a high-flexibility STP cable for a vehicle. The high-flexibility STP cable sequentially comprises twisted-pair wire cores, a metal shielding layer, a shielding braid layer and a sheath from inside to outside, and the shielding braid layer is formed by weaving an Alu Coat aluminum coating basalt fiber shielding braid layer on the surface of the metal shielding layer, and adopts 24 ingots and 10 Alu Coat aluminum coating basalt fiber conductors with the monofilament diameter of 0.23 [mu] m to be uniformly attached to the surface of the metal shielding layer. The wire core is composed of seven tinned copper conductors and a foamed PP insulating layer, wherein the maximum diameter of each tinned copper conductor is 0.16 mm, and the outer diameter of each tinned copper conductor is 1.3-2.6 mm. And the sheath is made of a TPU (Thermoplastic Polyurethane) material. The utility model provides the high-flexibility STP cable for the vehicle, which is light in weight, low in cost and stable in structure.

The application discloses a kind of BOSA optical device light beam focal length controllable system and its implementation method, it is related to optical communication technical field, it is solved in prior art because of environmental temperature fluctuation and leads to focal length drift, light beam quality drops and the problem of poor eye diagram quality;Including first focal length quality analysis module, second focal length quality analysis module, intelligent focal length adjustment module and signal optimization module;First focal length quality analysis module predicts future environmental temperature change through long short-term memory network, and plans the best focal length path in advance;Second focal length quality analysis module identifies light beam characteristic parameters using a depth image recognition algorithm, and performs multi-objective optimization in combination with environmental temperature change trend;Intelligent focal length adjustment module dynamically adjusts focal length according to optimization suggestions;Signal optimization module applies a deep learning network for waveform shaping and noise suppression, significantly improving eye diagram quality;The application greatly improves the focal length stability of the system, enhances the performance and reliability of optical communication system.

The invention relates to the technical field of motors, in particular to a high-magnetism-gathering anti-saturation less rare earth permanent magnet and electromagnetic salient pole hybrid excitation motor which comprises a front end cover, a machine shell, a rear end cover, a rotating shaft, a stator and a rotor. The rotor is composed of a rotor iron core, neodymium iron boron permanent magnet steel, ferrite permanent magnet steel and an excitation winding, an even number of salient poles are uniformly distributed on the rotor iron core, arc-shaped contours are processed on two sides of a pole body of each salient pole to form a gourd-like excitation winding groove, the excitation winding is wound in the gourd-like excitation winding groove, and the excitation winding is wound in the excitation winding groove. Magnetic steel grooves for placing ferrite permanent magnet steel are formed in the outer sides of the gourd-like excitation winding grooves; and magnetic steel grooves for placing neodymium iron boron permanent magnet steel and arc-shaped magnetic isolation grooves are formed in the salient pole shoes. According to the invention, the magnetism gathering performance of the salient pole rotor can be effectively improved, the air gap flux density waveform can be improved, the distortion rate can be reduced, and the design of the gourd-like excitation winding grooves can effectively reduce the magnetic circuit saturation of the rotor and improve the torque performance of the motor.

This invention provides a fault-tolerant control system and method for a magnetic levitation motor based on virtual sensing technology, relating to the field of magnetic levitation motor technology. The system includes a magnetic levitation motor body, a turbine expander, a measurement and monitoring unit, a power amplification and power supply unit, and a digital controller. The digital controller receives multi-source signals synchronously acquired by the measurement and monitoring unit to obtain the physical measured displacement of the rotor. It performs a mechanism-data dual-drive composite aerodynamic disturbance estimation for the magnetic levitation motor to obtain the aerodynamic compensation force and calculate the virtual displacement of the magnetic levitation rotor. It performs orthogonal reconstruction of the physical measured displacement and the virtual displacement to obtain the reconstructed displacement feedback signal for the digital controller to control the rotor. The digital controller calculates the basic feedback control quantity based on the closed-loop error according to the reference levitation control law. The digital controller reassembles the feedback source, aerodynamic compensation force, and control parameters of the basic feedback control quantity online to form the final control output.

This invention provides a pressure detection system, control method, and vehicle for an EGR valve, relating to the field of vehicle technology. The EGR valve pressure detection system includes a pressure measuring device, a first air pipe, a second air pipe, and a cleaning device. The pressure measuring device includes an inner cavity and a detection unit disposed within the inner cavity. The inner cavity is connected to the inlet and outlet ends of the EGR valve via the first and second air pipes, respectively. The detection unit is used to detect the pressure in the first and second air pipes within the inner cavity. The cleaning device is connected to the inner cavity and is used to clean the inner cavity with gas. The beneficial effect of this invention is that it can reduce the margin in the EGR rate calibration, thereby improving engine thermal efficiency.

The invention discloses a transient stability adaptive damping control method and system for a multi-network power supply system. The method comprises the following steps: acquiring an adaptive coefficient of a virtual synchronous machine of the multi-network power supply system under a current working condition; obtaining an angular frequency deviation according to the converter output angular frequency instruction value and the converter output angular frequency actual value at the previous moment; obtaining a dynamic damping increment according to the adaptive coefficient and the angular frequency deviation; equivalent damping is obtained according to the virtual damping and the dynamic damping increment; and according to the equivalent damping, the virtual inertia, a converter output active power actual value and an active power instruction value, a converter output angular frequency instruction value and a converter output angular frequency actual value at the previous moment, performing active power control of the virtual synchronous machine by using an active power control equation after the self-adaptive damping coefficient is introduced. And obtaining a current converter output angular frequency actual value.