34 results about "Motor time" patented technology

The invention discloses a networked brushless direct current motor time-delay compensation and control method using the active-disturbance-rejection control technology. The method comprises the steps of (1) establishing a brushless direct current motor control system model containing time-varying network-induced delay, wherein the brushless direct current motor control system is described as a discrete time linear time-varying system containing single-step input time lag, and then the uncertain dynamic state, caused by time-varying delay, of the system is partially described as the additive noise of the system; (2) designing an extended state observer which is used for estimating the uncertain dynamic state caused by time-varying delay as a part of total disturbance; (3) conducting compensation on the time-varying delay item in the brushless direct current motor control system. The method can be used for effectively conducting real-time estimation and compensation on the uncertain dynamic state caused by time-varying network-induced delay by means of the extended state observer, and can well restrain the uncertainty caused by time delay, internal and external disturbance of the system and model uncertainty.

The invention discloses a multifunctional communication method for an integrated variable frequency motor and relates to a variable frequency motor communication method. For monitoring and control on a common motor, fault feedback is realized only through a relay, real-time monitoring on each motor state in a group can not be realized, and reasonable distribution of the motor time and a rotation speed on the basis of external factors can not be realized. According to the multifunctional communication method, a communication protocol for data transmission between an integrated variable frequency motor system and a host computer is set to realize monitoring and control on the integrated variable frequency motor, monitoring and control authorities are divided, and monitoring and control in corresponding grades are respectively carried out by the host computer according to different authorities. According to the method, polling for each motor state in the group can be realized through communication monitoring, during communication abnormity, the motor automatically shuts down to protect the system, so safety and reliability are realized.

A method for recognizing an obstructed situation of a traveling element. The method includes evaluating a variable containing information about the motor's rotational speed as the motor is driving the element. Starting from a current detection time point, the sequence of values of the variable determined at immediately preceding detection time points are observed. Change in behavior of the sequence of observed values of the variable with respect to one another over time are then compared with a value range of the variable that is indicative of the element being obstructed. A sufficient match between the value range of the variable and the sequence of observed values of the variable exists if at least three successive observed values of the variable fall within the variable value range. The element is determined to be obstructed upon the existence of a sufficient match. The variable includes the duration of motor time periods.

A three-phase AC asynchronous motor time-sharing start-up method is a start-up method of controlling the voltage. When the three-phase asynchronous motor starts, we control the alternating current sine voltage of the three-phase power supply time-sharingly and input it into the carry-in terminal of the motor. When the instantaneous voltage difference of any two phases in the three phases, A, B and C, is zero, we turn on the two phases' voltage and impose them on the two corresponding carry-in terminal of the motor. We don't turn on the other phase's voltage until its instantaneous voltage is zero after a short time. The invention decreases the start-up current greatly on the foundation of guaranteeing that the three-phase asynchronous motor has enough start-up torsion.

The present invention provides a system and method for informing public transport vehicle arrival information, the system comprising: a plurality of on-board devices installed on respective public transport vehicles, each of the on-board device having a transceiver for transmitting and receiving data from and to public transport vehicle stops along a public transport vehicle line, a first processing unit programmed to store and process the received data, and a first display module which is operatively coupled to the first processing unit and is for displaying the data, wherein the data includes identification of the vehicle, schedule time frame and next schedule departure time of a following vehicle, the schedule time frame being obtained by subtracting a current departure time at a vehicle terminus from a next schedule departure time,- and a plurality of public transport vehicle stop devices installed in the respective vehicle stops, each of the public transport vehicle stop device having a preset vehicle identification therein and having a transceiver for transmitting and receiving the data from and to the on-board device if the preset vehicle identification matches the vehicle identification of the on-board device, a second processing unit programmed to store and update the received data to count down a waiting time of the vehicle till zero and then, if necessary, switch to count up a delay time, and a second display module which is operatively coupled to the second processing unit and is for displaying the waiting time or the delay time and other information.

The present invention belongs to the field of separation technology, and is especially vacuum pumping unit for decompression distilling apparatus. The vacuum pumping unit includes condenser with hot medium inlet connected to the outlet pipe of the decompression distilling tower and Roots-water ring vacuum set or Roots-reciprocating vacuum set in the outlet pipeline of hot medium outlet of the condenser. Adopting vacuum set to provide negative pressure source for the decompression apparatus makes the present invention has high pumping rate, fast starting, powerful adaptability, shortened operation time, stable operation state and other advantages. The present invention may be used widely in atmospherical and vacuum unit of petrochemical industry.

The invention discloses a networked brushless direct current motor time-delay compensation and control method using the active-disturbance-rejection control technology. The method comprises the steps of (1) establishing a brushless direct current motor control system model containing time-varying network-induced delay, wherein the brushless direct current motor control system is described as a discrete time linear time-varying system containing single-step input time lag, and then the uncertain dynamic state, caused by time-varying delay, of the system is partially described as the additive noise of the system; (2) designing an extended state observer which is used for estimating the uncertain dynamic state caused by time-varying delay as a part of total disturbance; (3) conducting compensation on the time-varying delay item in the brushless direct current motor control system. The method can be used for effectively conducting real-time estimation and compensation on the uncertain dynamic state caused by time-varying network-induced delay by means of the extended state observer, and can well restrain the uncertainty caused by time delay, internal and external disturbance of the system and model uncertainty.

A three-phase AC asynchronous motor time-sharing start-up method is a start-up method of controlling the voltage. When the three-phase asynchronous motor starts, we control the alternating current sine voltage of the three-phase power supply time-sharingly and input it into the carry-in terminal of the motor. When the instantaneous voltage difference of any two phases in the three phases, A, B and C, is zero, we turn on the two phases' voltage and impose them on the two corresponding carry-in terminal of the motor. We don't turn on the other phase's voltage until its instantaneous voltage is zero after a short time. The invention decreases the start-up current greatly on the foundation of guaranteeing that the three-phase asynchronous motor has enough start-up torsion.

The invention discloses a multifunctional communication method for an integrated variable frequency motor and relates to a variable frequency motor communication method. For monitoring and control on a common motor, fault feedback is realized only through a relay, real-time monitoring on each motor state in a group can not be realized, and reasonable distribution of the motor time and a rotation speed on the basis of external factors can not be realized. According to the multifunctional communication method, a communication protocol for data transmission between an integrated variable frequency motor system and a host computer is set to realize monitoring and control on the integrated variable frequency motor, monitoring and control authorities are divided, and monitoring and control in corresponding grades are respectively carried out by the host computer according to different authorities. According to the method, polling for each motor state in the group can be realized through communication monitoring, during communication abnormity, the motor automatically shuts down to protect the system, so safety and reliability are realized.

The invention relates to a variable-step-length dynamic compression method for real-time monitored data in a mine environment, belonging to a time sequence data compression method. The method is a variable-step-length data compression method, which is designed for the real-time performance, the timeliness, the multi-source performance and the massive performance of monitored data of a mine hydrological sensor; sample characteristics of monitored data of the mine environment are analyzed, so that an real-time early warning level dividing point of the mine environment is calculated; the event early warning level of the mine environment is comprehensively calculated; compression step lengths of real-time and historical monitored data are respectively calculated; and a compression algorithm of the historical and real-time monitored data is designed. By means of the variable-step-length dynamic compression method for the real-time monitored data in the mine environment disclosed by the invention, a monitored data sample of the mine environment can be dynamically adjusted; the event early warning level of the mine environment is calculated; a monitored data compression function having the variable compression step length can be realized; by means of the method, the change tendency of the monitored data can be reflected as much as possible; while motored time sequence data characteristics are reserved, the data storage space and the time can be simplified; and the monitored data inquiry and display efficiency can be increased.

The invention discloses an engineering vehicle safety running monitoring method. The engineering vehicle safety running monitoring method comprises the following steps that shape change sensor signalsare collected, and whether no load exists or not is judged; if no load exists, no control signals are output; if no load does not exist, the next step is conducted; the vehicle running state is detected, and whether running is conducted or not is judged; if running is not conducted, no control signals are output; if running is conducted, the next step is conducted; driver card information is read, and whether the driver card information is legal or not is judged; if the driver card information is illegal, refueling and gear increasing are stopped; if the driver card information is legal, no control signals are output, and the next step is conducted; the driver continuous driving time is detected, and whether fatigue driving exists or not is judged; if fatigue driving exists, refueling andgear increasing are stopped; if fatigue driving does not exist, no control signals are output, and the next step is conducted; the tilt angle sensor information is collected, and whether the tilt angle is smaller than 5 degrees or not is judged; if the tilt angle is smaller than 5 degrees, the vehicle speed is controlled to be smaller than 60 km / h; if the tilt angle is not smaller than 5 degrees,whether downhill exists or not is continuously conducted; if downhill does not exist, no control signals are output; and if downhill exists, gear increasing is stopped, and the vehicle speed is controlled to be smaller than 30 km / h.

The invention discloses a multivariable fitting-based parameter optimization modeling method for a generator speed regulating system. The method comprises the following steps: firstly, by a multivariable fitting method, fitting the relationship between three performance indexes, namely percent overshoot, rise time and regulating time, of primary frequency modulation of a generator and four control parameters, namely unit regulation power, a hydraulic servo-motor time constant, a turbine steam time constant and a generator inertia time constant; with the obtained multivariable fitting formula of the primary frequency modulation as an equality constraint, control parameter value ranges and other conditions as inequality constraints and the optimal primary frequency modulation performance of the fine speed regulating system as a final target, searching the speed regulating system parameter with the optimal primary frequency modulation performance by a multi-target and multi-constraint nonlinear optimization method; and building an optimized generator speed regulating system model.

The invention relates to a method for controlling the time operation of a DC motor of a vehicle-mounted air conditioner controller. End open-circuit voltage position, feedback end short-circuit voltage position and the running distance of each cycle, read the current DC motor feedback end voltage position, (2) motor start judgment, (3) motor operation, (4) motor time learning, using the above The technical solution, the present invention provides a method for controlling the time operation of the DC motor of the vehicle-mounted air conditioner controller, regardless of whether the DC motor has a feedback terminal, and regardless of whether the feedback terminal fails, the DC motor can continue to run according to the time, thereby ensuring that the vehicle The air conditioning system can work normally, which improves the safety factor of driving.

The invention discloses a method and system for eliminating motor instability data based on electrical distortion analysis, including: setting motor operating state threshold data according to the magnitude of electromagnetic interference at the on-site signal acquisition end, and judging the current state of the motor; using limiting filtering and two-order Jump limit filtering algorithm, filter data and extract the characteristics of the motor running state; capture the characteristic points of the motor time, calculate the motor start start, start end, stop start, stop end time, judge the current sampling data stable operation data length and analyze and identify the current time Data, keep high-quality data. The present invention provides high-quality sampling data for motor fault diagnosis and prediction tasks, effectively improving motor fault diagnosis and prediction systems and other motor on-line monitoring systems in practical applications due to low data quality resulting in fault misjudgments and missed judgments, and fault evolution trends are not stable. Accuracy and other issues have improved the application value of this type of system in engineering practice.