9 results about "Load angle" patented technology

The invention discloses a high-frequency fatigue testing machine applying a magnetic axis type linear motor, and relates to the technical field of linear motor fatigue testing. The device comprises a test bench, a clamping mechanism, a dynamic load part and a load angle adjusting structure. The clamping electric cylinder drives the spline sliding rod to clamp and fix the motor, and the motor does not need to be disassembled. According to the dynamic load part, a load adjusting motor drives a rotating base and a centrifugal power pull rod, variable load is achieved by combining the centrifugal effect of a balancing weight, and the variable load is transmitted to an actuating rod through a load rope. The load angle adjusting electric cylinder can change the stress direction of the actuating rod, so that multi-angle loading is realized. According to the device, a dynamic adjustable load can be applied in real time in the operation process of the motor, aging data are synchronously collected through a temperature sensor and an electrical monitoring means, and multi-dimensional evaluation of motor fatigue is achieved. The device has the advantages of controllable load, adjustable direction, non-destructive installation, real working condition simulation and the like, and is suitable for testing the service life and the fatigue performance of the magnetic axis type linear motor.

The invention provides a two-phase hybrid stepping motor sensorless load angle estimation and locked-rotor detection method, and relates to the technical field of motor control. Firstly, phase voltage and phase current of a motor are collected, a continuous and smooth counter electromotive force signal is obtained by constructing a super-spiral sliding-mode observer, and a self-adaptive strategy of resistance parameter online compensation and sliding-mode coefficient online adjustment is introduced to improve robustness of the sliding-mode observer. And then, extracting a back electromotive force phase angle by using an orthogonal phase-locked loop based on an extended state observer, and calculating a load angle by combining the phase of the stator reference current. And finally, the load angle is compared with a multi-stage early warning threshold value, and real-time monitoring of the motor load and rapid detection of out-of-step and locked-rotor faults are realized. According to the method, the hardware dependence of traditional load angle calculation and locked-rotor detection on a position sensor is eliminated, meanwhile, the problems of high-frequency differential noise, filtering phase lag and the like in a sensorless algorithm are effectively solved, and high-precision load angle estimation and locked-rotor detection are achieved.

A motor controller including load angle error determination circuitry for determining a load angle error based on a difference between a motor load angle and a reference load angle. The motor load angle indicates an angle between a stator magnetic field and a rotor magnetic field of a motor. The motor controller includes current control circuitry for setting a current level for the motor based on the load angle error. The motor controller includes reference load angle control circuitry for setting the reference load angle based on the current level.

This application relates to a design method, system, and medium for a single-input multi-output robust speed controller. The method includes: Step 1, establishing a system model; Step 2, constructing a single-input multi-output controlled object; Step 3, robust speed controller design; Step 4, robustness verification; and Step 5, control command execution. This method, by employing a single-input multi-output structure, fully utilizes multi-dimensional state information such as guide vane position, mechanical power, and load angle as auxiliary feedback, and achieves robustness through systematic H... ∞ The optimized design achieves coordinated optimization of each control channel, resulting in overall performance far exceeding that of a single-variable design.

The invention discloses a synchronous reluctance motor wide speed range control method based on load angle observation and tracking. According to the method, a stator flux linkage vector angle and a load angle are estimated online through a full-speed-domain hybrid flux linkage observer, and a cascade closed-loop control system with voltage saturation as a criterion and the load angle as a regulation and control core is constructed; and furthermore, an optimal current vector angle is dynamically generated, and smooth transition and stable operation of the motor in a constant torque region, a flux weakening region and a maximum torque-voltage ratio region are realized through a unified control framework. According to the invention, high dynamic response performance is ensured, the adaptive ability of the system to change of working conditions such as bus voltage can be effectively improved, and complex mode switching logic in traditional field weakening control is simplified.

A method for controlling an electronic converter, includes: for each of the phases of the electronic converter, measuring an instantaneous current and an instantaneous voltage of the electronic converter; calculating, from the current measurements and voltage measurements: an active power exchanged by the electronic converter and an effective value of voltage of the electronic converter; calculating an effective value of voltage imposed by the conversion step of the electronic converter. The load angle or a load angle-dependent parameter is obtained from the active power, the effective value of voltage and the effective value of imposed voltage; the frequency of a voltage set-point that must be generated by the electronic converter is calculated from the load angle or the load angle-dependent parameter; and the voltage set-point to be generated by the electronic converter is obtained. A system for controlling an electronic converter to carry out the method is also provided.

A control system of a loading machine having a working machine including a bucket includes a control device. The control device detects a first surface of a dug object dug by the bucket in a digging operation; and calculates a digging-in load angle indicating an angle of the first surface with respect to a horizontal plane based on detection data of the first surface; and estimates a weight of the dug object based on the digging-in load angle.

The application provides a kind of two-phase hybrid stepping motor position sensorless load angle estimation and stall detection method, it is related to motor control technical field.First, the phase voltage and phase current of motor are collected, the continuous smooth back electromotive force signal is obtained by constructing supercoil sliding mode observer, and the adaptive strategy of introducing resistance parameter online compensation and sliding mode coefficient online adjustment is introduced to improve the robustness of sliding mode observer.Then, the back electromotive force phase angle is extracted by using the quadrature phase-locked loop based on extended state observer, and the load angle is calculated by combining the phase of stator reference current.Finally, the load angle is compared with the multi-stage early warning threshold, the real-time monitoring of motor load and the rapid detection of out-of-step stall fault are realized.The application eliminates the hardware dependence of traditional load angle calculation and stall detection on position sensor, effectively overcomes the problems of high-frequency differential noise, filter phase lag and other problems in sensorless algorithm, and realizes high-precision load angle estimation and stall detection.

The invention discloses a method for rapidly determining a TiAl alloy lamellar interface and a load angle, and relates to the technical field of material performance tests.According to the technical scheme, the method is characterized in that a TiAl alloy sample containing a lamellar cluster to be observed is prepared, and the sample comprises two adjacent and perpendicular observation planes; grinding and polishing the two observation planes; establishing a space rectangular coordinate system by taking an intersecting line of the two observation planes as a Y axis; carrying out metallographic corrosion on the ground and polished sample; respectively measuring an included angle between the lamellar interface and the X axis in the first observation plane and an included angle between the lamellar interface and the Z axis in the second observation plane; calculating a normal vector of the lamellar interface based on the two included angles; and calculating an included angle between the lamellar interface and the load direction based on the normal vector. The direction vectors of the lamellar interface on different observation planes are obtained through the optical microscope, the included angle between the load direction and the lamellar interface is calculated, and the method has the advantages of being easy and convenient to operate, large in observable area, high in included angle determination speed and the like.