Research on Engine Cranking Process in Downhill Braking Condition for an Electric Drive Underground Dump Truck

2013 ◽  
Vol 364 ◽  
pp. 92-96 ◽  
Author(s):  
Shu Yang Zheng ◽  
Chun Jin
Keyword(s):  
Electric Drive ◽  
High Speed ◽  
Synchronous Motor ◽  
Dump Truck ◽  
Zero Crossing ◽  
Energy Feedback ◽  
Braking System ◽  
Speed Sensor ◽  
Ac Power ◽  
Searching Method

The retarder braking system of an electric drive dump truck is introduced in this paper. When the truck is going downhill at a low speed, part of the braking energy is consumed by braking resistance system, other energy is changed into AC power by inverter module, the diesel engine is dragged from an idling speed to a high speed by the synchronous motor, energy feedback is realized. In this paper, to achieve synchronous motor starting, a zero crossing detection and frequency searching method based on rotor speed sensor is used,.The experiment shows the engine is started steadily and the current shock becomes flat.

scholarly journals Synthesis of the finite controller for the servo drive with the synchronous motor

2021 ◽  
Vol 29 (2) ◽  
pp. 145-157
Author(s):  
Alexander V. Starikov ◽  
Viktor A. Kirdyashev
Keyword(s):  
Transfer Function ◽  
Electric Drive ◽  
High Speed ◽  
Block Diagram ◽  
Sampling Period ◽  
Synchronous Motor ◽  
Power Converter ◽  
Transient Processes ◽  
Positioning Error ◽  
Servo Drive

The paper is devoted to the synthesis of a finite controller for a digital servo drive with a synchronous motor, as well as to the determination of the possibility and area of its application. A block diagram of the single-loop servo drive is considered, which contains a digital finite controller that ensures the completion of transient processes in a strictly defined number of clock cycles of the sampling period. The form of the discrete transfer function of the finite controller is proposed. The transfer function of the closed-loop electric drive with the proposed type of controller is found. The system of equations was compiled and solved, which makes it possible to determine the tuning parameters of the finite controller for the servo drive with the synchronous motor. The results of computer simulation are given, showing that the transient processes in the control and disturbing effects in the servo drive are completed in 6 clock cycles of the sampling period. A formula is obtained for calculating the output signal of a finite controller for digital technical implementation on a microcontroller. A computational model of the considered digital electric drive has been developed, taking into account the limitation of current and voltage in the power converter. At small sampling periods, a servo drive with the finite controller is shown to require current limitation at the level of 16 nominal values. At low limiting values, the drive becomes unstable. To ensure the operability of an electric drive with the finite controller, it is proposed to increase the sampling period. It is shown that, in this case the servo drive remains stable in the entire range of displacements even under current and voltage limitations at the level of nominal values. The simulation results made it possible to conclude that the developed electric drive has a high speed of response, since during the development of the control action, the entry into the zone of 1 discrete from the set value is 0.022 s. It is shown that the presence of a static positioning error, which increases with an increase in the sampling period, is a negative effect of the finite control application in the servo drive with the synchronous motor. The electric drive in question is proposed to be supplied with one more position loop with an integral controller, which allows to compensate for the static positioning error.

Investigation on the Output Signal of Rotational Speed Sensor for Different Flux Surfaces between Gear Wheel and Sensor

2016 ◽  
Vol 850 ◽  
pp. 172-178
Author(s):  
Ugur Demir ◽  
Pelin Süle ◽  
Mustafa Caner Aküner
Keyword(s):  
Rotational Speed ◽  
Output Signal ◽  
High Speed ◽  
Gear Wheel ◽  
Automotive Application ◽  
Electronic Control ◽  
Braking System ◽  
Speed Sensor ◽  
Speed Measurement ◽  
Control Units

Rotational Speed Sensors are typically used to measure rotational speed in automotive application such as ABS (Anti-lock Braking System), ASR (Anti Slip Regulation) or Gear Box. In terms of application area, rotational speed sensors transmit very important signal from gear wheel to ECU (Electronic Control Units). The output signal of rotational speed sensor (RSS) may not provide exact solution in high speed situation because RSS is a kind of inductive sensor which has discharge and charge time. Thus, response time of RSS may lead a problem for exact speed measurement while the output signal is settling. In this study to evaluate different flux surfaces, both low speed @0.8RPM and high speed @3992 RPM, 6 experiments were performed for normal, convex and concave teeth setups. It has been seen that the output signal form of convex teeth setup is more appropriate than normal teeth setup and concave teeth setup for sinus signal.

Interior Winding Synchronous Motor for Reducing Iron Loss at Ultra-High-Speed

2020 ◽  
Author(s):  
Ryoken Masuda ◽  
Manabu Horiuchi ◽  
Mitsuhide Sato ◽  
Yinggang Bu ◽  
Masami Nirei ◽  
...  
Keyword(s):  
High Speed ◽  
Synchronous Motor ◽  
Iron Loss ◽  
Ultra High Speed

Ultrasonic sensor system for the uses in intelligent motion control system of a mobile robots group

2010 ◽  
Vol 7 ◽  
pp. 109-117
Author(s):  
O.V. Darintsev ◽  
A.B. Migranov ◽  
B.S. Yudintsev
Keyword(s):  
Control System ◽  
Mobile Robot ◽  
Mobile Robots ◽  
Motion Control ◽  
High Speed ◽  
Ultrasonic Sensor ◽  
Sensor System ◽  
Motion Control System ◽  
Speed Sensor ◽  
Working Space

The article deals with the development of a high-speed sensor system for a mobile robot, used in conjunction with an intelligent method of planning trajectories in conditions of high dynamism of the working space.

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