7 results about "Direct torque control" patented technology

The invention provides a self-adaptive speed regulation method based on conveying belts of multiple movable telescopic belt type reversed loader. The load island phenomenon in the collaborative conveying process of a plurality of movable telescopic belt type reversed loaders can be effectively relieved, the resource utilization rate and the operation efficiency of a conveying system are improved, and meanwhile high-precision and quick-response inter-partition dynamic speed regulation is achieved through direct torque control.

This invention discloses an ALK-PEM electrolysis hydrogen production synchronous control method based on direct torque and droop control, implemented using a "DTC-adaptive droop" dual-loop collaborative control architecture, including: real-time acquisition of the total power P input from wind and solar power sources. total The absolute value of the state of charge and power change rate of the hydrogen storage system, |dP / dt|, is used to generate electrolyzer power commands. The electrolyzer includes an alkaline electrolyzer (ALK) and a proton exchange membrane electrolyzer (PEM). An adaptive droop coefficient is dynamically calculated based on the absolute value of the state of charge and power change rate of the hydrogen storage system, |dP / dt|. The electrolyzer power P of the PEM and ALK is allocated accordingly. PEM and P ALK ; P PEM and P ALK The generated instructions are input to the DTC controller, which produces PWM drive signals to drive the PEM and ALK electrolyzers respectively. The corresponding control system and a hydrogen production device including the control system are also disclosed. The hydrogen production device further includes: a PEM electrolyzer unit, an ALK electrolyzer unit, and a wind and solar power interface.

The application discloses a control system of a distributed drive vehicle and a control method thereof, and comprises a whole vehicle integrated brake controller and a motor controller. The whole vehicle integrated brake controller is used for acquiring vehicle state signals, and the vehicle state signals at least include vehicle speed, wheel speed and motor rotating speed. The motor controller is in communication connection with the whole vehicle integrated brake controller, and the motor controller is integrated with a direct torque control module. The application realizes millisecond-level fast response by sinking the slip rate control to the inside of the motor controller through the direct torque control module, and solves the problems of long control period and slow response of the traditional traction control system.

The application discloses a direct torque control method and system considering DC bus voltage imbalance, and relates to the field of motor control. The method comprises the following steps: determining the distribution law of voltage vectors in the fundamental wave alpha-beta subplane and the harmonic x-y subplane when the DC bus voltage is unbalanced; determining three groups of virtual vector groups according to the distribution law and a set condition; the set condition is that the distribution of three basic voltage vectors in the harmonic x-y subplane is greater than 180 degrees, and the three basic voltage vectors are composed of two large vectors and one medium vector in the fundamental wave alpha-beta subplane; obtaining the optimal virtual vector based on the three groups of virtual vector groups according to the DC bus voltage ratio, the sector K value, the system torque and the flux demand; sorting the switches in two two-level three-phase voltage source inverters according to the action time of the three basic vectors in a control period, obtaining the optimized switch sorting, and then controlling the voltage source inverters. The application can efficiently operate under the DC bus voltage imbalance.

The application relates to a long-distance belt conveyor control system for TBM construction and belongs to the technical field of long-distance belt conveyor control in TBM construction. In view of the technical problem that the long-distance belt conveyor in TBM construction is easily affected by load fluctuation, the technical solution points of the application are as follows: a load detection unit and a speed detection unit are arranged; a central controller is connected with the load detection unit, the speed detection unit and a driving unit containing a frequency converter and a driving motor, a sampling and control cycle of 50ms-200ms is adopted, a model prediction control algorithm is built-in, target torque and speed are output by rolling optimization under the constraints of speed and acceleration absolute values, and the frequency converter adopts vector or direct torque control to drive the motor to operate. The system is mainly used for slag transportation control of the long-distance belt conveyor in TBM construction and realizes efficient and stable operation.

The application relates to the technical field of engineering vehicle control, and discloses a remote control type high-speed aerial platform truck driving energy management system and a control method. The system comprises a vehicle controller, front / rear axle driving motors, a battery management system and a remote controller. The vehicle controller directly maps a remote control rocker travel into driving or braking demand torque, realizing direct torque control. The system receives allowable charging and discharging currents and voltages of the BMS in real time, converts the currents and voltages into dynamic torque limit values based on the law of conservation of energy, and combines one-dimensional interpolation table lookup of high and low speed gears to correct power. When braking, a two-dimensional mapping model of vehicle speed and braking depth is used to give feedback torque. The application solves the problems of response lag of traditional speed loop control and inaccuracy of high-speed operation, guarantees battery safety, and significantly improves energy recovery efficiency and driving stability.