Motor Stop Research Articles

Design and Implementation of a Three-phase Asynchronous Motor Intelligent Test System

Background: The locomotive traction motor has gradually shifted from DC motors to AC motors in high-speed railways, and the traction motor needs to be regularly maintained and tested frequently. Objective: The aim of this study was to test the related motor performance by obtaining and analyzing motor data from the test according to the standard "Three-phase Asynchronous Motor Test Method (GB-T 1032-2012)". The performance of the tested motor has been evaluated to meet the relevant requirements of the application. Thus, reasonable and scientific references have been offered for the maintenance and repair of the motor. Methods: A three-phase AC asynchronous motor test system based on LabVIEW and an AC power dynamometer was constructed based on the needs of the factory and type test of a three-phase AC asynchronous motor. Ambient temperature measurement, insulation resistance measurement, DC resistance measurement, no-load characteristics test, overspeed test, blocking characteristics test, load test, and temperature rise test have been carried out. The data on voltage, current, speed, power, and so on, have been collected. A 125 kW three-phase asynchronous motor was tested with the designed system, and the parameters obtained from the system were compared with those from the motor labels. Results: The three-phase AC asynchronous motor test system was designed based on LabVIEW and AC dynamometer operating on an industrial computer with a precision measuring instrument. The most advanced virtual instrument technology was used to combine the powerful data computing and processing ability with the measurement and control ability of instrument hardware. The software proved to be able to acquire data display, control, storage, and analysis simultaneously. In addition, a high degree of intelligence, an automatic motor start and stop control, automatic synchronous acquisition of test data, automatic data processing and calculation, and automatic test report generation and printing function were covered in this system. The simulated results of the system agreed well with the actual performance of the three-phase asynchronous motor, and helped the motor to operate well. Conclusion: The designed testing system exhibited a high automation ability, reliability, and accuracy. It proved to be a time and manpower-saving technical method, improving the actual test efficiency, and helped to reduce labor intensity dramatically.

Speed Control of D.C Motor using GSM Technique

Electric drive systems employed in several industrial applications need higher performance, responsibleness, and skill to vary the speed. One among the enticing options of the dc motor over all alternative styles of motor is that the relative ease with that speed management may be achieved. During this paper, speed management of dc motor mistreatment GSM technology has been investigated. It's a closed-loop real time system, wherever the feedback circuit is coupled to the motor shaft to produce the feedback speed signal. A mobile phone is hooked up to the feedback circuit that is a trigger. The PWM signal are send to motor driver to vary the voltage provide to motor. GSM (SMS) controlled dc motor is automatic control system which capable of receiving a set of command instructions in the form of short message service and performs the necessary actions like start stop and speed control. We will be using a dedicated modem/mobile at the receiver module i.e., with the robot itself and send the commands using SMS service as per the required actions. The mobile unit which is dedicated at the motor driver is interfaced with an intellectual device called micro controller so that it takes the responsibility of reading the received commands in the form of SMS from the mobile unit and perform the corresponding predefined tasks such as motor start, stop, motor direction and speed control at different levels etc.

Smart Vehicle Automation Using Internet of Things

The field of automobile automation, though relatively new, has taken over the world by storm with the advent of driverless cars and smart vehicles. While these vehicles provide various automation features like autopilot, auto cruise control and automatic braking which enhance the driving experience and ensure safety, there are not many provisions for further safety, driver protection and problem prevention. Keeping this in mind, we have proposed a very inexpensive model to monitor the driver’s state and the in-vehicle safety, with an automatic braking system, using various sensors—gas (detecting highly poisonous toxic gases), IR (seatbelts), alcohol (if the driver is drunk), temperature/flame (for fire inside and temperature recording), humidity, LDR (automatic headlights) and ZIGBEE (automatic braking). A 12 V DC motor (wheel) controlled by L298N. The vehicle status and the motor stop reason is displayed in a basic LCD display. The data collected in all these sensors is displayed in the cloud for analyses. Arduino was used for interconnection, automation and system control. NodeMCU for cloud connection. The whole system is powered by a 5 V power source.

Speed Control of AC Motor Using GSM

GSM (SMS) Controlled AC Motor is automatic control system which capable of receiving a set of command instructions in the form of Short message service(SMS) and performs the necessary actions like Start, Stop and speed control. We have used a dedicated modem/mobile at the receiver module i.e. with the model itself and send the commands using SMS service as per the required actions. The GSM modem which is dedicated at the motor driver is interfaced with an intellectual device called Micro controller so that it takes the responsibility of reading the received commands in the form of SMS from the mobile unit and perform the corresponding predefined tasks such as motor start, stop, motor direction and speed control at different levels. The utilization of GSM modem in this project as it ubiquity standard which enables subscribers to use their phones in many parts of the world, and make international roaming very common between mobile phone operators. This system is extremely handy and convenient to operate at any place for controlling the speed and direction of motor.

Speed control of three phase induction motors using PowerFlex 525 compact AC drive

Most of the control systems have to make things move and that generally involves motors. Lifting, blowers, conveyors, pumping, robotics, and fans – pretty much everything uses a motor of some kind. All-purpose single or three-phase motors are huge for simple on/off systems and Inverter-duty motors are particularly designed for operation with variable frequency drives (VFD). They convert electrical energy into mechanical energy, which produces a mechanical rotary action that does some form of work. Alternating current motors are the common types of motors used in commercial and industrial applications. The fundamentals of drive programming and configuration with the PowerFlex 525 compact Alternating current drive, the CompactLogix PLC and the Studio 5000 Logix Designer software is used for configuring these drives. A characteristic that provides complete parameter groups for all the range applications used for the PowerFlex 525 AC Drive. The PowerFlex drive is used with ControlLogix, CompactLogix controllers and different Allen-Bradley products. Point-to-point positioning mode options used for the accurate motor stop at positioning in that system to save money and time during system operation, development, and maintenance. The addition of Allen-Bradley motor control devices into the Logix control devices helps to reduce programming time, ease startup, commissioning and streamline diagnostics.

PLC Based Multi-Product Vending Machine

The vending machine is a kind of cash driven machine that automatically distributes snacks, drinks and other consumer products automatically. Consumer pay coin into a slot, once a choice is made by pressing the push button, the machine dispenses the item purchased. Money, card or coin-based product vending machine by using embedded microcontrollers; Arduino and Raspberry Pi are currently used in systems. By using these microcontrollers, it is complicated when there was a technical error. In this project, we have created a multi-product coin type vending machine by using Mitsubishi PLC. The Programming Logic Controller (PLC) used automatically to monitor and control with high speed, efficiency, and reliability. Switch ON the power supply. Put the coin in the coin acceptor, and then select the product by pressing push button. The motor starts rotating along with the spring and moves the selected item until it released from the spring. The Hall Effect sensor used to count the rotation with the help of the magnet to sense. When the product released from the spring the motor stop rotating and the released product is ready to dispense. The drawback of the project is the vending machine cannot detect fake coins and the consumer cannot refund the money if they slot a coin when there is no product in the machine. [1],[ 3],[5]

Different Technology In Designing Vending Machine

The vending machine is a kind of cash driven machine that automatically distributes snacks, drinks and other consumer products automatically. Consumer pay coin into a slot, once a choice is made by pressing the push button, the machine dispenses the item purchased. Money, card or coin-based product vending machine by using embedded microcontrollers; Arduino and Raspberry Pi are currently used in systems. By using these microcontrollers, it is complicated when there was a technical error. In this review paper, we have created a multi-product coin type vending machine by using Mitsubishi PLC. The Programming Logic Controller (PLC) used automatically to monitor and control with high speed, efficiency, and reliability. Switch ON the power supply. Put the coin in the coin acceptor, and then select the product by pressing push button. The motor starts rotating along with the spring and moves the selected item until it released from the spring. The Hall Effect sensor used to count the rotation with the help of the magnet to sense. When the product released from the spring the motor stop rotating and the released product is ready to dispense. [1],[ 3],[5]

Mood induction effects on motor sequence learning and stop signal reaction time.

The neurobiological theory of positive affect proposes that positive mood states may benefit cognitive performance due to an increase of dopamine throughout the brain. However, the results of many positive affect studies are inconsistent; this may be due to individual differences. The relationship between dopamine and performance is not linear, but instead follows an inverted "U" shape. Given this, we hypothesized that individuals with high working memory capacity, a proxy measure for dopaminergic transmission, would not benefit from positive mood induction and in fact performance in dopamine-mediated tasks would decline. In contrast, we predicted that individuals with low working memory capacities would receive the most benefit after positive mood induction. Here, we explored the effect of positive affect on two dopamine-mediated tasks, an explicit serial reaction time sequence learning task and the stop signal task, predicting that an individual's performance is modulated not only by working memory capacity, but also on the type of mood. Improvements in explicit sequence learning from pre- to post-positive mood induction were associated with working memory capacity; performance declined in individuals with higher working memory capacities following positive mood induction, but improved in individuals with lower working memory capacities. This was not the case for negative or neutral mood induction. Moreover, there was no relationship between the change in stop signal reaction time with any of the mood inductions and individual differences in working memory capacity. These results provide partial support for the neurobiological theory of positive affect and highlight the importance of taking into account individual differences in working memory when examining the effects of positive mood induction.

Effects of Different Voltage Sag Types on Induction Motor

This paper analyzes effects caused by voltage sag types A, B, C and D on induction motor based on experimental test. The effect can be investigated in term the current peaks and speed variation. The magnitudes depend on magnitude of sag and duration, voltage sag types, during and recovery voltage sag. Several of voltage sag characteristics have been conducted in different magnitude, duration and sag types. The results show that the current peaks generated reach more than 4 times of normal current and it was achieved at recovery voltage instant. Sag magnitude has great influence on the current peak but sag duration is not significantly. Type A voltage sag only can cause the motor stop running and it was achieved when it was subjected to sag magnitude of 10% and 6s in duration. The motor stops running in shorter duration when it was subjected to interruption with sag duration of 4s. Therefore voltage sag of type A lead to more severe on induction motor if compared with other sag type. This is according to number of phase that experience sag. The magnitude and duration of voltage sags have influenced significantly on the motor speed only for low sag magnitude and long sag duration.

Wide speed range for traction motor in braking force of electric braking control system

A vehicle stopping method using an electric brake until a traction motor is stopped is studied. At the moment of vehicle stop, electric brake is changed to control mode where torque is reduced at a low speed. Gradient is controlled by estimating the load torque of motor, thereby traction motor is not rotated after stop. In addition, coasting operation and brake test are performed from normal-opposite operation and start using a small-scale model comprising the inertial load equipment and the power converter. Further, traction motor is made to be equipped with a suspension torque. Pure electric braking that makes traction motor stop by an air brake at the time of stop is also implemented. Constant torque range and constant power range are expanded during braking so that braking force is secured with the electric brakes even in high speed region. Therefore, vehicle reduction effect can be expected by reducing parts related with an air brake which is not used frequently by using a pure electric brake in the M car in wide speed region. Further, maintenance of brake system can be reduced. Besides, ride comfort of passenger in the electric rail car, energy efficiency improvement, and noise reduction effect can be additionally expected. Further, an improved brake method that uses only an electric brake till motor stop is proposed by comparing those in the blending brake that uses an air brake while reducing brake torque at vehicle stop.

Design of Monitoring System to Marine Diesel Engine Supply Units Based on Forcecontrol Monitoring Software

In order to understand the working position of the status of marine diesel oil unit in time, reducing the failure rate and improving fuel supply efficiency, Forcecontrol monitoring system based on PLC and Configuration Software is designed. The lower computer S7-200Smart PLC is collected the signal of the system such as temperature, pressure, viscosity and flow rate sensor periodically, by means of analyzing data, outputting a control signal to control the corresponding valves opening or closing as well as various types of motor start or stop status. A Forcecontrol monitoring configuration software is used as upper computer, to execute remote control and monitoring of the system.The system can realize video surveillance of field apparatus via the Forcecontrol configuration software without adding external devices and keeping high system integration, and achieve application innovation of Forcecontrol monitoring configuration software.

High-Voltage Three-Phase Asynchronous Motor Soft-Starter via Hyristor for Water Cooling System of Steel Mill

This article introduces a high-voltage three-phase asynchronous motor soft-starter via thyristor that is suitable for water cooling system of steel mill. It improves motor start and stop characteristics, effectively eliminates water-hammer" effect caused by traditional direct start and stop, and is making more and more important positive impacts in the water cooling system of steel mill.

PLC Applied in the Three-Phase Stepper-Motor Control System

The paper gives the introduction of characteristics and the work principle of the three-phase stepper motor. A method based on Siemens PLC (programmable logic controller) to the three-phase stepper motor control, PLC controlled the stepper motor by changing the system control parameters corresponding program to realize the three-phase stepper motor start and stop control, positive/negative control and speed control, can improve the control system flexibility and reliability, and obtain good control and accurate position.

Motor Cortex Physiology and Stop Signal Reaction Times as Predictors and Correlates of Atomoxetine Responses in Children with ADHD (P07.179)

Motor Cortex Physiology and Stop Signal Reaction Times as Predictors and Correlates of Atomoxetine Responses in Children with ADHD (P07.179)

Motor Cortex Physiology and Stop Signal Reaction Times as Predictors and Correlates of Atomoxetine Responses in Children with ADHD (IN11-1.008)

Motor Cortex Physiology and Stop Signal Reaction Times as Predictors and Correlates of Atomoxetine Responses in Children with ADHD (IN11-1.008)

Temporary short circuit detection in induction motor winding using combination of wavelet transform and neural network

Monitoring system for induction motor is widely developed to detect the incipient fault. Such system is desirable to detect the fault at the running condition to avoid the motor stop running suddenly. In this paper, a new method for detection system is proposed that emphasizes the fault occurrences as temporary short circuit in induction motor winding. The investigation of fault detection is focused on the transient phenomena during starting and ending points of temporary short circuit. The proposed system utilizes the wavelet transform for processing the motor current signal. Energy level of high frequency signal from wavelet transform is used as the input variable of neural network which works as detection system. Three types of neural networks are developed and evaluated including feed forward neural network (FFNN), Elman neural network (ELMNN) and radial basis functions neural network (RBFNN). The results show that ELMNN is the most simply and accurate system that can recognize all of unseen data test. Laboratory based experimental setup is performed to provide real-time measurement data for this research.

Simulation and Analysis during Conveyor Stop Process Based on AMESim

This paper builds drive system model of belt conveyor during three kinds of stop process based on AMESim, and deduces belt tension equations. A case study on a long belt conveyor dynamic performance concludes that the braking stop process is shortest and motor stop process is longest. Also, the torque change rules of drive pulley among three kinds of stop process are same, that is increase at the beginning and decrease at last. The displacement of gravity take-up is largest during motor stop process, and the gravity moves far from the original point during power-off stop process.

Associations between laboratory measures of executive inhibitory control and self-reported impulsivity

Personality measures of maladaptive behavior often target the notion of impulsivity, which broadly refers to rapid and ill-considered conduct. The underlying cause of impulsive behavior, however, is not well understood, and there are many conflicting results. It has been suggested that impulsivity arises from inhibitory dyscontrol, a neuropsychological notion that is assessed via behavioral measures. We conducted a preliminary investigation of the association between a common self-report measure of impulsivity, the Barratt Impulsiveness Scale, and four behavioral paradigms of inhibitory control (motor inhibition, stop signal, Stroop, and negative priming) in normal adults ( n = 31; age range: 19–51). Stroop conflict correlated significantly with non-planning, attentional, motor, and overall self-reported impulsiveness; motor disinhibition correlated significantly with non-planning impulsiveness; and response variability was associated with motor impulsiveness. Thus, there is evidence to suggest that, among normal adults, impulsivity is associated with some specific measures of inhibitory dyscontrol.

A new mask-antimask coded-aperture telescope for hard X-ray astronomy

A new imaging balloon-borne telescope for hard X-rays in the energy range from 30 to 100 keV is described. The imaging capability is provided by the use of an extended URA-based coded-mask. With only one motor and suitable stop pins, we can rotate a carbon-fiber wheel with most of the mask elements attached to it by 180°, and a bar, which is also part of the mask pattern and is allowed to rotate freely over the wheel, by 90°; this combined rotation creates an antimask of the original mask, except for the central element. This is a novel and elegant manner of providing an antimask without additional weight and complex mechanical manipulations. We show that the use of antimasks is a very effective method of eliminating systematic variations in the background map over the position-sensitive detector area. The expected sensitivity of the instrument for the 30–100 keV range is of the order of 7 × 10-5 photons cm-2 s-1 keV-1, for an integration time of 104 seconds at a residual atmosphere of 3.5 g cm-2. This telescope will provide imaging observations of bright galactic hard X-ray sources with an angular resolution of ∼2° in a 10° by 10° FOV, which is defined by a collimator placed in front of the detector system. We are particularly interested in the galactic center region, where recent imaging results in X-rays have shown the presence of an interesting source field. Results of computer simulations of the imaging system are reported.

Spoken‐instruction controlled system for an automotive vehicle

To avoid pinched fingers, a verbal "Stop Window" command causes a stop and momentary reversal of window motion. A spoken-instruction controlled system for an automotive vehicle which can stop a moving device such as a door window closing device after having driven it reversely for a fixed period when a spoken instruction is inputted thereto through a microphone. In the system according to the present invention, even if there exists a time delay from when the driver utters the spoken instruction to when the device stops perfectly, it is possible to stop the device at or before a position at which the driver utters the spoken instruction. The system according to the present invention comprises at least one motor reversing controller and a timer unit, in addition to the conventional spoken-instruction controller including at least one switch, at least one motor stop controller and a speech recognizer.