106results about How to "Avoid burnt out situations" patented technology

The invention discloses an arc-discharge prevention charging method for an energy accumulation type electric traction vehicle. The arc-discharge prevention charging method comprises the following steps of (1) detecting voltage on a power rail; (2) judging whether the voltage on the power rail is more than 0, and if the voltage on the power rail is not more than 0, executing the step (3), otherwise executing the step (4); (3) forbidding power supply to the power rail; (4) supplying power to the power rail, detecting current on the power rail, and if the current on the power rail is less than or equal to preset current, stopping the power supply to the power rail. When the power is supplied to the power rail, a power receiving system is in good contact with the power rail; furthermore, when the power receiving system is separated from the power rail, the power supply to the power rail is stopped; therefore in the processes of contact and separation between the power receiving system and the power rail, electric arc is not produced, so that the phenomenon that the power receiving system and the power rail are burned by the electric arc is effectively avoided; the service lives of the power receiving system and the power rail are effectively prolonged. The invention also discloses a charging system capable of executing the charging method.

An embodiment of the invention discloses an information processing method, first electronic equipment and second electronic equipment. The first electronic equipment is provided with a charging interface; and the second electronic equipment supplies power to the first electronic equipment through the charging interface. The information processing method comprises the steps of: detecting temperature of the charging interface when the first electronic equipment is in a charging state, and judging whether a detected temperature value reaches a first threshold value to obtain a first judgment result; and indicating the second electronic equipment to switch off or decrease a charging current supplying power to the first electronic equipment when the first judging result is that the temperature value reaches the first threshold value.

The invention discloses an electric sewing machine which comprises a machine head, a bedplate, a stent, an electromotor and a pedal, wherein, the machine head is provided with a presser foot and a machine needle which are arranged in the position opposite to the bedplate; the presser foot is provided with a U-shaped opening; and the electromotor is provided with a clutch which is linked with the pedal through a link lever; and the electric sewing machine also comprises a bobbin thread monitoring apparatus. When the electric sewing machine works at a high speed, and conditions that bobbin threads use up or break, the stitch slips, the bobbin threads loose, etc. happen, a thread position sensor can be triggered by sewing threads on the machine needle, and a signal can be given out to impel the bobbin thread monitoring apparatus to act and enable the electric sewing machine to stop. The bobbin thread monitoring apparatus has the advantages of simple structure and low manufacturing cost, and no need of a complicated electronic control system for realizing the bobbin thread monitoring; and the machine can be stopped when no bobbin thread exits and the bobbin threads breaks, or the stitch slips or the bobbin threads loose, thereby realizing the effect that the sewing material is effectively utilized, saving resources, reducing the product rework rate, and improving the production efficiency.

The invention relates to an alternating current direct constant current driving technology of a light emitting diode (LED) luminous device, discloses the LED luminous device directly driven in a constant current by an alternating current, and aims at the problem that the LED luminous device is directly driven by the alternating current in the prior art. The technical scheme includes that a parallel branch composed of n LED modules and a constant current unit connected in series is connected on the output end of a rectifying circuit, and cyclical flickering phenomenon caused by alternating voltage change can be avoided by setting current values, turn-off voltages and connecting voltages of branch constant current units. Because current of each branch is constant, LEDs in the LED modules can not cause current change because of change of junction temperature, and reliability is improved. Increasing of branch numbers enables a wave form of a driving current to approach a sine wave, and power factor and efficiency of the luminous device are improved through theory analysis.

The invention discloses a voltage test device and a voltage test method. The voltage test device is used to test a first circuit board, wherein the circuit board comprises a fist connector. The voltage test device is couple with a power supply unit so as to obtain input voltage from the power supply unit, and the power supply unit provides a power supply for the first circuit board. The voltage test device comprises a voltage generating unit, a connection part and a comparison module, wherein the voltage generating unit is used to receive the input voltage and converts the input voltage to a preset voltage; the connection part is used to be coupled with the fist connector of the first circuit board and obtain a first measurement voltage from the fist connector; and the comparison module is coupled with the connection part and the voltage generating unit separately, receives the first measurement voltage and the preset voltage and compares the first measurement voltage with the preset voltage to provide the test result.

The invention relates to the technical field of sensors, in particular to a heat-sensitive sensor and a temperature measuring method. The heat-sensitive sensor comprises shells, a sensor and a controller, wherein first grooves are uniformly formed in the corresponding inner end surfaces of a first shell and a second shell; a second groove communicates with a cavity; one end of a sliding rod is fixedly connected with the bottom of the second groove through a second spring; the end, away from the first shell, of a first spring is fixedly connected with a movable column; a clamping plate is hinged to the end, away from a fixing plate, of the movable column; and the surface of the clamping plate is fixedly connected with the sensor. According to the invention, limiting of the fixing plate is released by pressing the sliding rod, and then the fixing plate drives the first spring and the movable column to drive the clamping plate to clamp a lithium battery, so the purpose that the sensor is not damaged when the lithium battery is installed is achieved, temperature detection can be carried out on lithium batteries of different shapes, the application range of the heat-sensitive sensor is improved, and the service life of the heat-sensitive sensor is prolonged.

Provided is a starting circuit for an automobile. The starting circuit for the automobile comprises a storage battery, a battery main switch and a starter, wherein the positive pole of the storage battery is connected with one end of the battery main switch through a power line, the other end of the battery main switch is connected with the positive pole of the starter through a starter positive wire, the negative pole of the starter is connected with the negative pole of the storage battery through a negative bond strap, a bonding piece is arranged on the negative bond strap, the bonding piece is connected with a common bonding point on a frame, the positive pole of the storage battery is connected with the input end of a finished automobile electrical appliance constant-electricity load and the input end of a finished automobile electrical appliance non-constant-electricity load, and the output end of the finished automobile electrical appliance constant-electricity load and the output end of the finished automobile electrical appliance non-constant-electricity load are connected with the common bonding point and other bonding points on the frame through a frame harness respectively. According to the starting circuit for the automobile, the phenomenon that electricity of the starting circuit goes to other circuits by mistake can be effectively prevented, the phenomena that the electricity goes to a frame harness by mistake and a fire breaks out are effectively avoided, safety and reliability are high, and the application range is wide.

The invention discloses a plastic package motor, which comprises a thermal protector, a plastic shell and a stator assembly packaged in the plastic shell, wherein the thermal protector is contacted with the stator assembly and packaged inside the plastic shell. The thermal protector is injection molded inside the plastic shell and directly contacted with the stator assembly, so that the thermal protector can detect the actual temperature of a stator winding directly, thereby effectively avoiding occurrence of a circumstance that a motor winding is burnt out because of delay of the thermal protector; and because the thermal protector is plastic packaged inside the plastic shell directly, a traditional thermal protector bracket is saved, thereby enabling the size of the whole plastic package stator to be reduced, and being conducive to lightening and thinning development of a motor. The invention further discloses a plastic package motor adopting the plastic package stator, and an air conditioner indoor unit adopting the plastic package motor.

The invention relates to computer graphics card chip fixing and processing equipment which comprises a mounting substrate and a fixing sleeve, the fixing sleeve is mounted on the mounting substrate, and the computer graphics card chip fixing and processing equipment can solve the problems that when an existing graphics card chip is mounted, a, when the existing graphics card chip is mounted, pinsof a display card chip are often damaged during fixing, so that the display card chip is damaged, the cost is greatly wasted, and the production efficiency is influenced; and b, when an existing display card chip is stored, a certain amount of moisture often exists on the display card chip due to environmental reasons, and when the display card chip containing the moisture is installed on the display card and powered on, the display card chip is extremely easy to burn out, and the cost is wasted.