33results about How to "Stop working" patented technology

An inverter controller for driving a brushless DC motor, of which rotor is provided with permanent magnets, includes an inverter circuit, a position sensing circuit, a DC voltage sensor, and a conduction angle controller. The inverter circuit is connected to the brushless DC motor for driving this motor. The position sensing circuit senses a rotor position with respect to a stator from an induction voltage of the brushless DC motor. The DC voltage sensor senses a voltage value of a DC power voltage supplied to the inverter circuit. The conduction angle controller changes a conduction angle of the inverter circuit within a range less than 180 degrees in electric angles in response to a rate of change in the DC power voltage.

An air pump capable of automatic air supplements has a housing, a low-pressure blower, a high-pressure blower, a first auto-stop controller, and a second auto-stop controller. The low-pressure blower is used to inflate an inflatable article with low-pressure air and allows the air pump to stop working during inflation automatically. The high-pressure blower is used to inflate an inflatable article with adjustable high pressure air, so that the inflatable article can have a hardness suitable for a user's need, and allows the air pump to stop working automatically during inflation or to supply air automatically during inflation. The air pump can stop working automatically and can supply air automatically without manual work, and can inflate the inflatable article to the hardness suitable for the user's need conveniently.

The invention discloses a double-stage thermoelectric material device, which includes a base and a thermoelectric device body. A groove is opened on the upper surface of the base, and a thermoelectric device body is arranged inside the groove. The thermoelectric device body includes a lower substrate and an upper substrate. , conductive plate, double-stage P-type thermoelectric element, double-stage N-type thermoelectric element and electrode rod, the lower base plate and the upper base plate are symmetrically arranged; by setting threaded columns, rotating shafts, bearings, extruded plates, mounting plates and bolts, in When installing and fixing the thermoelectric device body, the threaded column is driven to rotate by turning the handle, and then the rotating shaft is driven to rotate in the bearing, so that the extrusion plate moves to the left to fix the thermoelectric device body in the groove, and the telescopic rod can squeeze The pressure plate is used to limit the position, which improves the safety guarantee. By using double-stage P-shaped thermoelectric elements and N-shaped thermoelectric elements, thermoelectric materials in different temperature ranges are superimposed and used in parallel, which can make full use of the physical properties of different materials and effectively improve the performance of thermoelectric devices. power generation efficiency.

The application provides a touch-type belt tear-proof protection device, which includes a bracket, a touch probe, a protector and a collecting tray; the protection device is installed between the upper belt and the lower belt of the belt running machine; the bracket is fixed on the belt On the middle frame on both sides of the running machine, it is used to fix the touch probe and the protector; the touch probe includes the main touch probe and at least one auxiliary touch probe; one end of the main touch probe is fixed to one end of the bracket connection, the other end is fixedly connected with one side of the protector, and the other side of the protector is fixedly connected with the bracket; the auxiliary touch probe is distributed on the lower surface of the main touch probe; the collecting plate is located under the touch probe, The two ends of the collection tray are fixedly connected with the intermediate frame; the protector includes an internal protection circuit and an external protective cover. When the touch probe comes into contact with falling coal, the protection circuit is triggered and shutdown protection is triggered. The protection device provided by the application has the function of preventing the belt from being torn conveniently, promptly and safely.