44results about How to "Solve the stall" patented technology

The invention discloses a method and device for detecting motor stalling. The detection method includes the steps that fan chopping is controlled to a first threshold value; in the situation that the first rotating speed of a fan is lower than a second threshold value, the fan is controlled to operate within first preset time; after the fan operates for the first preset time, fan chopping is controlled to the first threshold value; whether the second rotating speed of the fan is lower than the second threshold value or not is detected; in the situation that the second rotating speed of the fan is lower than the second threshold value, the fan is controlled to stop operating within second preset time; after the fan stops operating for the second preset time, fan chopping is controlled to the first threshold value, and the fan is controlled to operate within third preset time; whether the third rotating speed of the fan is lower than the second threshold value or not is detected; in the situation that the third rotating speed of the fan is lower than the second threshold value, motor stalling of the fan is judged. By means of the method and device for detecting motor stalling, the problem that motor stalling of an air conditioner cannot be detected in the prior art is solved, and the effect of accurately detecting motor stalling in real time is achieved.

The invention provides a stalling detecting circuit for a refrigerator fan motor. The stalling detecting circuit comprises a current detecting circuit, an amplifying circuit and a control circuit, wherein the input end of the current detecting circuit is connected to a drive circuit of the refrigerator fan motor and detects current passing the drive circuit in the refrigerator fan motor; the input end of the amplifying circuit is connected to the output end of the current detecting circuit, and the amplifying circuit is used for amplifying a first voltage signal output by the current detecting circuit to output an amplified second voltage signal; and the control circuit is connected to the amplifying circuit, receives the second voltage signal output by the amplifying circuit and judges whether stalling happens to the refrigerator fan motor according to change of the second voltage signal. Correspondingly, the invention further provides a refrigerator and a control method of the refrigerator. With the adoption of the technical scheme, the current signal of the fan motor can be detected; and if the fan motor abnormally stalls, the control circuit of the refrigerator performs forced defrosting control or gives an alarm after an abnormal feedback signal is detected, so that abnormal refrigeration of the refrigerator is avoided.

The invention relates to a motor blocking control circuit for a cooking machine, the invention solves the shortcomings of the prior art, The technical scheme is as follows: The cooking motor is powered by a power supply unit, the power supply unit is positively connected with the cooking motor through a pair of normally open contacts of the contactor KM1, the power supply unit is inversely connected with the cooking motor through a pair of normally open contacts of the contactor KM2, A high-temperature detection switch circuit is arranged on the cuisine motor, the positive electrode of the power supply unit is connected to the first end of the normally closed button SB1, the second end of the normally closed button sb1 is connected to the first end of the normally open button sb2, The first end of the normally open button SB2 is connected to the second end of the normally open button SB2 through the normally open delay disconnect contact of the time relay KT1, and the first end of thenormally open button SB2 is also connected to the second end of the normally open button SB2 through the normally open delay disconnect contact of the time relay KT2.

The invention discloses a deicing mechanism with a position self-adaptive adjustment function, and a self-adaptive adjustment method thereof. The deicing mechanism comprises a main body frame, an infrared ranging module, a control adjustment module, a lead screw sliding block module and a deicing module, wherein the infrared ranging module, the control adjustment module, the lead screw sliding block module and the deicing module are all installed on the main body frame, the main body frame is of a T-shaped structure, the infrared ranging module comprises a first sensor and a second sensor, thefirst sensor is installed at the front end of a top plate of the main body frame, and the second sensor is installed on the same horizontal plane of an axis of a knocking motor of the deicing module;and the control adjustment module is installed at the middle end of the top plate of the main body frame. By adopting the deicing mechanism and the self-adaptive adjustment method thereof, the knocking deicing module adjusts the position self-adaptively, the overhead lines of different diameters can be deiced, the problems that the ice layer cannot be knocked and the T-shaped rotating rod is blocked by means of the overhead lines or thick ice layer during the climbing process of the deicing mechanism on the overhead lines are solved, and the deicing efficiency can be effectively improved.

The invention discloses a double-core high-speed two-wheeled picomouse exploration controller, comprising a sensor device, a gyroscope device G, a vacuum suction device and a control unit module; the sensor device and the gyroscope device are both in signal connection with the control unit module; the control unit module is respectively in signal connection with motors X, Y and M. The controller solves the problem of skidding of a picomouse in walking through the vacuum suction device arranged under a chassis, and meanwhile automatically regulates the servo control of a vacuum suction direct current motor M according to the walking speed of the picomouse and ground conditions, thereby preventing the picomouse from being bound to labyrinth ground road conditions.

The invention provides a resetting method for a pointer of an automobile instrument. The method comprises the following steps that: 1, a rotary potentiometer is arranged on a rotary shaft, which is used for controlling the pointer of the automobile instrument, of a stepping motor, wherein the rotary potentiometer is electrically connected with an instrument control system and comprises a resistor body and a movable contact which is arranged on the resistor body and is linked with a rotation shaft of the stepping motor; 2, voltage is applied to two ends of the resistor body; and 3, when a vehicle is just ignited and the speed is zero, the instrument control system acquires a voltage signal of the movable contact, acquires the slip angle of the pointer relative to the zero point according to the acquired voltage signal of the movable contact, and controls the stepping motor to drive the pointer to rotate a corresponding angle to zero. By the method, the problem of lock during automobile ignition and resetting of instrument can be solved, and defects of vibration and noise of the instrument pointer during resetting of the instrument and shortening of service life of the stepping motor are eliminated.

The invention discloses anti-jamming electric pruning scissors, which comprise a motor, blades, a motor control circuit and a detection device. The motor control circuit is used for supplying drive current to the motor. The detection device electrically connected with the motor control circuit is used for detecting rotation speed of the motor or detecting current flowing through the motor in operation. When the detected rotation speed of the motor is not matched with a preset value or the current flowing through the motor in operation exceeds a preset value, the detection device starts the motor control circuit to control the motor to rotate reversely and periodically, so that the blades are drawn back and freed from jamming. The anti-jamming electric pruning scissors can be used for simply, quickly and effectively solving the problem of jamming of the pruning scissors.

The invention discloses a magnetic coupling driving numerical control plug. The magnetic coupling driving numerical control plug comprises a lower plug, a plug main body, a titanium alloy plug, a permanent magnet sheet fixing sleeve, a coupling, a valve sleeve, a valve core, a rubber ring, a driving shaft, permanent magnet sheets, a speed reducer, an absolute value encoder and a permanent magnet shaft, the plug main body achieves static sealing by using a first O-shaped ring group, one permanent magnet sheet is arranged in each permanent magnet sheet mounting hole of the permanent magnet sheetfixing sleeve, and one end of the permanent magnet sheet fixing sleeve is connected to the output shaft of the speed reducer through the coupling; and the titanium alloy plug is placed in the hole ofthe permanent magnet sheet fixing sleeve in a sleeved mode, the titanium alloy plug is in clearance fit with the permanent magnet sheet fixing sleeve, the permanent magnet shaft and the driving shaftare connected by adopting a mortise and tenon structure, the permanent magnet shaft rotates under the action the high magnetic field in the permanent magnet sheet fixing sleeve, a driving thread is arranged on the upper part of the driving shaft and matched with the thread of the plug main body, the output end of a high torque DC motor is connected to the speed reducer, and the absolute value encoder is mounted at the tail of the high torque DC motor and used for recording the rotating ring number of the high torque DC motor so as to indirectly determine the position of the valve core.

The invention provides a juicer. The juicer comprises a machine body, a cutting assembly, a juicing assembly and a drive assembly, wherein a first feeding channel and a second feeding channel are formed in the machine body; the cutting assembly is mounted in the second feeding channel; the juicing assembly is mounted in the machine body, and is positioned below the first feeding channel and the second feeding channel; the drive assembly is connected with the cutting assembly and the juicing assembly, and drives the cutting assembly and the juicing assembly to work. According to the juicer provided by the invention, common fruits and vegetables, such as apples can be fed into the juicer from the first feeding channel, and are juiced directly through the juicing assembly, so that the function the same as that of the traditional juicer is realized; while the food materials having thick and long fibers and high hardness, such as sugarcane, are fed into the juicer from the second feeding channel and are cut up through the cutting assembly first, the cut up food materials are then juiced through the juicing assembly, therefore, the pressure caused by the cut up food materials to the juicing assembly is greatly reduced, further, the problems of stuck motor, juicer rotation blockage and the like are solved, and finally, the purpose of smoothly squeezing the food materials such as sugarcane is realized.

The invention discloses a through shaft type remote control pressing plate and a remote control method thereof, and belongs to the technical field of hard pressing plates of electric power secondary equipment. The pressing plate comprises a pressing plate body and an intelligent control part, the pressing plate body comprises a pressing plate base, a pressing plate handle and a pressing plate connecting rod, and the intelligent control part comprises a through shaft type stepping motor, a control circuit, a switching-on state detection circuit and a switching-off state detection circuit. A through hole is formed in the center of the pressing plate base, the lower end of the pressing plate connecting rod penetrates through the through hole and is connected with the through shaft type stepping motor through a lead screw structure, and the pressing plate handle is arranged at the upper end of the pressing plate connecting rod. The control circuit controls the through shaft type stepping motor to rotate according to a remote control signal, the pressing plate connecting rod is driven to move up and down to carry out switching-on and switching-off operation of the pressing plate; and the switching-on state detection circuit and the switching-off state detection circuit detect the switching-on and switching-off state of the pressing plate according to the up-down moving position of the pressing plate connecting rod. The through shaft type stepping motor is adopted, the control precision is high, and the remote control pressing plate switching reliability is high.