679 results about "Motor activation" patented technology

A position sensor-free double closed-loop speed regulation control method for a brushless DC motor comprises the following steps: (1) initializing functional modules and peripherals; (2) opening AD (Analog-Digital) interruption and protection interruption; (3) detecting the start key of the motor, judging whether to start the motor, if yes, executing the next step, and if not, continuing to execute the step; (4) starting voltage detection, judging whether the voltage of a main circuit is larger than starting voltage, if yes, executing the next step, and if not, returning to the step (3); (5) entering a motor starting subprogram and beginning operating the motor; (6) entering a double closed-loop speed regulation subprogram, and regulating the rotational speed and the current of the motor according to voltage value; and (7) detecting a motor brake key, judging whether to press the key, if yes, entering a motor brake subprogram, and if not, returning to the step (3). The method provided by the invention overcomes the defects of larger size, low rotational speed accuracy and the like of the conventional motor controller, can accurately control different rotational speeds of the motor, and can simultaneously realize counter electromotive force zero-cross comparison position sensor-free reversing and Hall position signal reversing.

Disclosed is a sanitary or no-touch dispenser which dispenses sheets of a web material, such as a paper towel. The disclosed dispenser provides the web material to a user by using both manual and electronic means to dispense the sheet. This is accomplished by having a motor engagably connected to an actuator roller. The motor is activated by a motor activation means, such as a switch. The motion of the actuator roller, which is started by the user grabbing and pulling a tail of the web material extending from the dispenser, causes the motor activation means to activate the motor which in turn drives the actuator roller to continue it its rotation motion to dispense the sheet from the dispenser.

The invention discloses a fan start state detection and start control method. A fan comprises a direct current motor; the direct current motor comprises an MCU processor and an IGBT. The method comprises: firstly, detecting the start state of the direct current motor, and then controlling the start of the direct current motor. According to the fan start state detection and start control method provided by the invention, the start reliability of the motor of the fan on various complex operation occasions is improved; the start universality of the fan is improved; and matching of different inertia fan loads is realized.

the invention relates to a performance testing system and a performance testing method for a portable motor, belongs to the field of performance testing of motors, and aims at solving the problem that a miniature special motor under 2Nm can not be tested by the existing measuring device. The performance testing system comprises a device bracket, a power unit, a frication unit, a measuring unit, an elastic loading unit and an electronic control unit, wherein the device bracket provides support and positioning for the power unit, the frication unit, the elastic loading unit, the pressure measuring unit, and the electronic control unit. The performance testing method comprises the following steps of: carrying out system initialization, starting the tested motor, driving an electronic drive pusher to push by a pusher motor driving circuit so as to carry out loading testing, obtaining corresponding rotation speeds and currents by testing, and drawing a current-torque curve of the tested motor according to all the obtained loading testing, thus obtaining the performance of the tested motor. The system and the method are used for testing the mechanical properties of the miniature special motor under 2Nm.

The invention discloses an electromobile driving system vector control method using double inverters. The electromobile driving system vector control method includes the following steps: collecting three-phase stator current, rotor position and rotating speed in an unwinding permanent magnetic synchronous motor, wherein the three-phase current is subjected to 3S/2R conversion to acquire current under a two-phase rotating coordinate system. A system adopts the vector control method with id equal to 0, a stator voltage instruction under the two-phase rotating coordinate system is acquired through double closed-ring control of a rotating speed outer ring and a current inner ring, stator voltage under the two-phase static coordinate system is acquired through 2R/2S coordinate conversion, control pulse of the double inverters is acquired through a single-power-source double-inverter SVPWM (space vector pulse width modulation) module, and switch devices of the double inverters are triggered to realize vector control of double-inverter SVPWM of the unwinding permanent magnetic synchronous motor. The electromobile driving system vector control method has the advantages that the unwinding permanent magnetic synchronous motor is quick to start, high in overload capability and good in speed adjusting performance; due to the single-power-source double-inverter SVPWM, voltage level of the system is increased, and safety and reliability of the system are guaranteed.

The invention discloses an electric bicycle control method based on a permanent magnet brushless direct current motor. According to the method, subdivided rotor position information is used for directly starting the motor, and the switching procedure from square wave starting to sine wave starting in a traditional control method is omitted. The electric bicycle control method relates to a rotor section calculation module, a speed calculation module, an angle subdivision module, a phasing adjustment module, a speed control module, a current-limiting control module, a waveform modulation module, a three-phase inverter and a motor starting module. By the adoption of the method, control efficiency and control performance are improved, and currents passing through a motor winding are in a sine wave mode when the motor operates; compared with a traditional square wave control method, torque pulsation is small, motor running noise is low, and the service life of the motor can be prolonged; compared with a traditional space vector control method, the algorithm is simple, implementation is easy, the requirement for a microprocessor is low, and high cost performance is achieved.

The invention discloses a starting method of a senseless permanent magnet synchronous motor, comprising the following steps: S10), after short-circuiting a motor winding, detecting a motor induced current by driving a sampling module of a controller; S20), determining whether the motor induced current is less than a predetermined value of induced current, if so, proceeding to step S30), or if not,proceeding to step S40); S30), performing open-loop start control; S40), determining whether the motor is in a forward or reverse rotation state, if in the forward rotation state, proceeding to stepS50), if not, proceeding to step S60); S50), performing forward rotation closed-loop vector start control; and S60), performing reverse rotation closed-loop vector start control. The starting method ensures the fast and low-current high-efficiency start when the permanent magnet synchronous motor is stationary or tends to be stationary, realizes fast closed-loop vector control under strong downwind or upwind conditions, reduces energy consumption, shortens start time, and makes motor start smooth.

The invention discloses an electronic control hydraulic driving system used for industrial vehicles. Functions such as walking, slope sliding, speed limiting, oil adding, steering, lifting and inclining of the vehicles are achieved by using a motor, a controller and a variable hydraulic system only, and meanwhile kinetic energy recycling, potential energy heavy load recycling and light load unloading are achieved. The system has the advantages that by means of a walking speed limiting device, the speed of the vehicles is limited, walking of the vehicles is stable, and automatic oil supplying can be conducted by the hydraulic system in the process of the slope sliding and braking; by adopting a combination type oil tank, oil cooling type installation of mechanical and electrical integration can be achieved, electric elements are not in contact with air, noise of the hydraulic system is reduced, and functions of water proofing, explosion proofing and cooling are achieved; interlocking is carried out on a walking device, a lifting device and an inclining device by the hydraulic system, so that the walking, the lifting and the inclining cannot be conducted at the same time, superposed large currents do not exist, and the discharge capacity efficiency of a storage battery is improved; startup from zero to load currents is completed in 600 millimeters by starting currents of the motor, large starting currents do not exist, and the energy can be saved by more than 15%.

A device controller synchronizes a counter to the detection of sunrise or sunset by photoelectrically sensing daylight, thereby establishing an approximate time reference for scheduling the timing of device activations to occur at any time of day or night. An uncalibrated method of measuring sunlight yields more reliable scheduling, relative to sunrise and sunset events. The integral approximate time reference is kept synchronized, even if occasional faults in detection of sunrise or sunset occur. The rules employed to establish and maintain synchronization, and the dynamically variable rules of evaluating changes in light intensity, contribute to the reliable performance of the controller apparatus. Inherently self-adapting and automatic, a potentiometer for setting a time parameter input and a push-button for setting a time parameter input are combined in the apparatus in such a way to yield further utility without complicating the programmability. Additionally, for animal feeder applications, a test mode utilizes <DEL-S DATE="20030318" ID="DEL-S-00001"/>a modulates<DEL-E ID="DEL-S-00001"/> activation of the feed motor to produce audible warning of imminent motor activation.

The invention comprises a programmable emergency-stop circuit apparatus and method that provides advanced functions not found in other systems. The circuit centralizes the control of high voltage motor power into one place, by providing connections for, in its minimum configuration, several different kill switches, a motors-on button, and an AC motor power relay coil. In the present invention, kill switches, emergency-stop and motors-on buttons, computer ready and watchdog signals are all conveniently connected in one location, alongside the AC motor power relay coil driver.

A system used in a protective relay for motors for transitioning the value of the trip threshold to a motor start (stall) condition. The calculated transition trip threshold value follows I²t, specifically, the current to the motor. The transition trip threshold value includes a small fixed initial (offset) value, so that the increase in the trip threshold during transition to the actual start condition threshold value is always slightly ahead of the increase in the I²t value, preventing a trip until the input current exceeds the final trip threshold for the start condition.

The invention discloses a double clutch-based torque precontrol system and method. The system comprises a transmission control unit, double clutches, a transmission and a motor control unit; the double clutches are connected with a motor; a first clutch in the motor is connected with an engine; the transmission control unit determines whether to carry out torque precontrol on a target clutch of the double clutches or not according to a rotational speed of the motor, the electric quantity of the motor or the opening degree of an accelerator and according to whether the first clutch normally works or not, whether a working state of the first clutch is non disengaging or not and whether a hybrid vehicle is in electric-only drive or not; and if yes, a first control signal is output to lower the working pressure of the target clutch until a difference between the rotational speed of the motor and the rotational speed of the transmission is kept in a preset range, a torque value of the target clutch is maintained, and a starting signal is sent to the motor control unit. By applying the embodiment of the invention, the comfort of the whole vehicle in the process of starting the engine by the motor is improved.

An electrical motor activation method for an electric motor including a rotor, connected to a motor shaft, and a stator having brushes. The stator comprises multiple commutator laminations for the commutation of windings disposed on the rotor and is activated by a pulsed or linearly controllable power source. The motor shaft is connected to a radially driven load, in particular a pump, which has a nonlinear torque curve via a motor revolution. A waviness signal is obtained from a voltage potential applied to the motor and/or from the motor current and rotor position information is obtained from the curve of said waviness signal.

The invention relates to an electric tool and electric tool control method. The electric tool consists of a working head, a motor which drives working head to output power, a power supply which provides power for motor, detecting elements which detect the parameter for load of characterization working head and output detection signal, a control module which receives detection signal and controls working head discontinuously output power depending on detection signal to judge the decrease of load for working head. The electric tools, with the situation which the load of working head decreases during the installation process, detecting element can detect the parameter for load of characterization working head changed for the changing of the installing condition of screw, and then output detection signal to control module. Control module discontinuously outputs power depending on the detect sent by detecting element, thereby achieving the goal that monitors screw slip or working head jumps out recessed groove of screw head, changes the working condition of the electric tool and improves the working efficiency in installing screws.

The invention discloses a control method for quick starting of an engine of a hybrid electric vehicle. According to the method, the driving mode is firstly selected to be the ECO mode or the SPORT mode, then an engine starting instruction is given for starting, during starting, the starting torque of a high-voltage generator is adjusted firstly until the rotating speed of the engine is in the expected rotating speed range, when normal oil injection of the engine is realized, the high-voltage generator is switched from the electric mode to the generation mode, and meanwhile, an electric energycompensation mechanism is triggered, so that electric energy consumed by the high-voltage generator during quick starting is quickly compensated, and the over-discharge fault of a battery is avoided until the high-voltage generator enters the normal generation working state, and quick starting is completed at the moment. By the aid of the design, on the basis that the driving intention of a driverand real-time working conditions of the vehicle are identified effectively, quick starting of the engine can be realized, the ultimate power requirement can be met, and failure of a high-voltage power system and mechanical power components can be avoided.

The invention discloses an intelligent control method for an automobile electric window. The intelligent control method comprises the following steps of: I, starting an electric window motor, starting a learning program, acquiring a current feedback value with an MCU (Micro Controller Unit), selecting peak value current IInrush from the acquired current feedback value, computing the motor locked-rotor current value of the action according to a formula, i.e., IStall:IStall is approximately equal to IInrush*P, taking 80-85 percent of P serving as a motor parameter, and storing the motor parameter into a temporary storage unit of the MCU; and II, acquiring the current feedback value of the motor at a certain time interval at the end of the learning program, comparing the current feedback value with the locked-rotor current value, stopping motor driving output if the current feedback value is greater than or equal to the locked-rotor current value, and continuing to perform the step II if the current feedback value is smaller than the locked-rotor current value. In the invention, intelligent control is performed by using the MCU, so that automatic correction of the motor locked-rotor current value is driven by using the electric window, and the service life of the electric window is prolonged.

The invention discloses a partial discharge ultrasonic detection device, belongs to the technical field of ultrasonic detection, and solves the problems of manual test and low detection precision in the existing partial discharge ultrasonic detection. The device has the technical key points that the partial discharge ultrasonic detection device comprises a base, universal wheels are pushed to facilitate movement of the device, a suction cup is in contact with a to-be-detected shell, an electric telescopic rod drives a rack to stretch out and draw back to enable a cam to rotate, so that a piston plate is subjected to pressure suction, an annular magnet reinforces stability, a first motor is started to drive connecting bases to get close to and get away from each other, the position of an ultrasonic sensor is conveniently adjusted, and pitching adjustment detection of the ultrasonic sensor is conveniently achieved through a hinge base and an air cylinder; a second motor is started to drive a lifting column to drive the ultrasonic sensor to perform lifting adjustment in the height direction, a third motor is started to drive a lifting base to drive the ultrasonic sensor to perform rotation detection under the action of a connecting shaft and a sliding block, and the device has the advantages of saving labor and being high in detection precision.

The invention relates to a method and device for testing startup characteristics of an ultrasonic motor based on single electrode feedback. The device is composed of an ultrasonic motor, a single electrode signal detecting and processing module, a load disk, a weight, a transmission shaft, an external fixed pulley and a high-precision photoelectric encoder. The load is changed through changing the weight hanging mode of the external fixed pulley, and thus startup characteristics of the ultrasonic motor under different loads are tested. According to the method and device, a single electrode feedback signal is utilized to act as a starting point signal for testing the startup characteristics of the ultrasonic motor, that is, the moment when the signal is acquired is defined as a starting point of a startup characteristic test for the ultrasonic motor, and the moment when the output of the ultrasonic motor reaches 95% of the target speed act as a termination point of the startup characteristic test for the ultrasonic motor. At present, tests for the startup response time of the ultrasonic motor mainly use the moment when 5% of the average speed is reached of motor startup as a startup starting point, the method and device provided by the invention consider that the period of time from acquisition of an electric signal from the ultrasonic signal to the moment when 5% of the target speed is reached should also be included in the startup response time of the ultrasonic motor.

The invention discloses a force moment zero-searching method for an elastic drive joint. The method comprises the following steps of: systemically electrifying the elastic drive joint, and starting a motor; positively or negatively rotating the motor at low speed, and stopping rotation of the motor when current of the motor is greater than a current threshold value; obtaining feature motor current when the motor reaches a feature point, a feature relative motor rotation angle measured by an incremental coder and a feature joint angle measured by an absolute type position sensor in a rotation process of the motor; and determining a relative angle between an electrifying reference zero point and an absolute zero point on the incremental coder according to the feature motor current, the feature relative motor rotation angle, the feature joint angle as well as a pre-determined first feature relative angle when the motor reaches a feature point and an absolute zero point at the first time after starting. The force moment zero-searching method disclosed by the invention realizes zero-searching of the incremental coder, so that the incremental coder can be used for measuring deformation amount of an elastomer; and moreover, an SEA joint structure is simplified, and the production cost is reduced.

The invention discloses a yard container crane heize device, which is characterized by the following: the double side of the heize device installs two cable drums connect to the decelerator; the central bearing of the two cable drums are fixed on both extremities of supporting rack; the armored rope on the surface of cable drum is the symmetrical double end arrangement; the lower part of the two cable drums (4,5) installs sling boarding or sling; two blocks are installed on the sling boarding or the two extremities of the sling; the double armored rope on the surface of cable drum cross the corresponding block directly; the whole device is placed in the middle of the small car frames, which uses the sling central lines as baseline; the armored rope crosses from the small car frame to sling top sheave; the motor activation decelerator takes the sling up and down by armored rope twisting on the double-drum. The invention improves the mechanical efficiency of the whole device, which reduces the cost.