4 results about "Motor time" patented technology

The invention provides a motor fault detection method and system based on vibration and current double-domain fusion, and relates to the technical field of motor fault detection.The method comprises the steps that an electric vehicle motor serves as a fault traceability root node, hierarchical progressive structured association topology pruning is conducted, and a minimum complete diagnosis topology is output; backtracking motor time sequence fault records to carry out fault association mining, and constructing an association fault probability matrix; probability graph model parameterization is carried out to obtain a fault probability association topology; executing multi-thread cross-modal feature tracking identification, and outputting a real-time motor fault prediction result and K associated fault prediction results; performing Bayesian inverse probability derivation, and outputting a real-time motor fault probability; and binding as a fusion diagnosis conclusion and outputting. According to the invention, the technical problem of inaccurate fault diagnosis caused by the fact that a single signal monitoring method in the prior art cannot accurately identify multiple fault modes when facing complex motor faults is solved.

The invention discloses a control method for a cold and hot vehicle of a carding machine and belongs to the technical field of carding machines. The control method comprises the steps of setting threshold parameters for judging cold and hot vehicle states, collecting actual operation parameters of the carding machine, judging whether the carding machine is in a cold vehicle state or a hot vehicle state currently according to the threshold parameters and the actual operation parameters, and controlling the production speed of the doffer according to the judgment result. And in the operation process, actual operation parameters are continuously monitored, and switching between the cold and hot vehicle states is achieved. The threshold value parameters comprise a downtime threshold value, a driving time threshold value and a temperature threshold value, and the actual operation parameters comprise the actual downtime and the actual driving time of the doffer and the actual temperature of the key position. According to the invention, automatic identification of the cold and hot vehicle state of the carding machine and self-adaptive control of the speed are realized, and the accuracy of cold and hot vehicle state discrimination and the automation level of the production process are improved.

The present invention relates to motor timed shutdown of power tools. When the trigger of a tool is accidentally actuated, power is provided to the motor of the tool, causing the output assembly of the tool to operate. This can be problematic when the tool is being stored. To address this, the tool starts or initiates a motor timer when the motor is operating at any non-zero speed. If the trigger remains actuated and the motor is simultaneously operating at any non-zero speed and the motor timer reaches a threshold limit, the tool stops or interrupts the provision of power to the motor, thereby shutting down the motor. This reduces the probability of accidental release of power from the power source and accidental damage to the output assembly of the tool to the storage mechanism or other environment.

This invention relates to a novel auxiliary and main drive motor driven 1INV-nEM system, which employs a single centralized inverter to drive multiple distributed motors, i.e., a 1INV-nEM architecture. The inverter's three-phase output is connected via split buses to multiple motor selection units composed of controllable switching modules. Each motor selection unit selectively couples the inverter's output to a corresponding motor. The control unit receives feedback signals from all motors and achieves time-sharing multiplexing control of multiple motors by controlling the on / off states of the motor selection units. This invention also provides a corresponding torque pulse width modulation (PWM) time-sharing control algorithm. By employing this novel auxiliary and main drive motor driven 1INV-nEM system, motor time-sharing control method, and vehicle, through hardware integration and software time-sharing control, system cost, weight, and wiring complexity are significantly reduced, effectively achieving concurrent control of multiple motors by a single inverter.