256results about How to "Simple and reliable design" patented technology

The invention relates to a variable-frequency power source based on the control of a digital signal processor, which comprises a switch power source module, a control circuit, a circuit for isolating and shaping pulse-width modulating signal, IPM inverting circuits, a circuit for detecting and protecting busbar voltage, a rectification input slow-start circuit, a communication circuit, an interface circuit for isolating and inputting parallel signals and an human-computer interface circuit for displaying the key. The invention adopts the structure of a single digital signal processor (DSP) coupled with the double IPM inverting circuits, provides two paths of independent variable-frequency power sources for two sets of asynchronous motors at the same time and carries out independent speed regulations to the two sets of asynchronous motors. The variable-frequency power source of the invention has the advantages of small volume, low power consumption, high reliability and being convenient for bulk production, etc., and adopts an appropriate switch frequency and an advanced voltage space vector pulse width modulation algorithm (SVPWM), thereby lowering the noise during the operation of the asynchronous motors and increasing the voltage utilization rate, with obvious effect on energy saving.

A sealing apparatus for use with a door which swings over a threshold and has a door lower end, a door face and a door frame, for closing the gap between the door lower end and the threshold, includes a mechanism mounting member; a substantially horizontal gate member for closing the gap; a slide bar positioned above and substantially parallel with the gate member, the slide bar having a protruding end extending laterally from the door toward the door frame to abut the door frame as the door is closed; structure for guiding the slide bar to move laterally relative to the door and to the mounting member; a leaf spring having a leaf spring first end and a leaf spring second end and a leaf spring central segment, the leaf spring first end being engagingly fitted to the slide bar and the leaf spring second end being engagingly fitted to the gate member, where the leaf spring central segment is resiliently pivotable upwardly and laterally to vertically displace the gate member relative to the slide bar; structure for guiding the gate member to move up and down relative to the door; so that closing the door causes the door frame to depress the slide bar protruding end, thereby sliding the slide bar horizontally in one lateral direction and causing the leaf spring to pivot to an increasingly vertical orientation and to thereby lower the attached gate member to make sealing contact with the threshold.

An ignition system for an internal combustion engine includes an ignition transformer with two primary windings. The ignition system is designed to generate, for a given ignition event, a unipolar current through the secondary winding by way of a control circuit that is configured to first energize and deenergize the first primary winding to establish a first electrical arc across the spark-plug electrodes and, when the current in the secondary winding reaches, or drops below, a current threshold, repeatedly energizes and deenergizes the second primary winding to establish a plurality of second current pulses across the electrodes in order to maintain the burn phase.

The embodiments disclose an attachable battery base module configured for powering at least one attachable application module coupled to the attachable battery base module, wherein the attachable battery base is configured for powering the at least one attachable application module, a heating module attachment with a temperature control module coupled to the attachable battery base module configured for heating and/or boiling a liquid, a cooling module attachment with the temperature control module coupled to the attachable battery base module configured for cooling a liquid and wherein the temperature control module includes a temperature maintenance mode, wherein the temperature maintenance mode is configured for maintaining a preset, predefined or user preselected desired temperature when the desired temperature is reached.

The invention relates to an intelligent home furnishing system which comprises an intelligent home furnishing host which comprises an AV (audio-visual) array, a control module and an intelligent gateway; a plurality of regional terminal modules connected by a five unshielded twisted pair (UTP) and the intelligent home furnishing host; a plurality of control modules with different buses and connected to the terminal modules and various controlled equipment connected to the control modules; and a plurality of DVD (digital versatile disc), set-top boxes, cameras, MP3 or other audio/video equipment connected to the intelligent home host. After being subject to AV array switch and signal modulation, the audio/video signals of the audio/video equipment are transmitted by the five UTP. In the invention, an integrated design of four functions comprising integrated intelligent control, audio-video sharing, background music and security monitoring is used, so the system has the advantages of simple and reliable design, good performance and strong compatibility.

The power feeding equipment (PFE) includes a laser energy delivering power supply (LEDPS), a CT energy taking power supply (ETPS) connected to LEDPS in parallel, and a unit for monitoring and controlling working conditions of parallel circuit between LEDPS and ETPS. The function for monitoring and controlling the parallel circuit realizes automatic switching between LEDPS and ETPS based on actual working conditions. Being independent on working conditions of circuitry of high voltage / super voltage transmission, PFE can supply power for high voltage / super voltage transmission continuously. PFE also includes an energy storage unit in use for making smoothly and seamlessly switching between LEDPS and ETPS for load. Features of PFE are: long continuous service life, and lower cost.

Aiming at the problems that time and labor are wasted when female and male silkworm eggs with different egg colors are separated and the requirement of production of silkworm seeds on time schedule is difficult to meet, the invention provides an instrument for automatically and accurately separating female and male silkworm eggs at a high speed, and the instrument is labor-saving and ensures thatthe silkworm eggs are not damaged. The separator for female and male silkworm eggs, provided by the invention, takes the characteristic that different sexual silkworm eggs have different egg colors as a design characteristic for recognizing and distinguishing the female and male silkworm eggs and focuses on overcoming the physiological property of the silkworm eggs that the silkworm eggs is not favorable for mechanical and automatic control. Through applying technologies such as turnplate type obliquely scraping egg transportation, and the like and using devices such as a single-channel prearranged counting and number control egg supply device, a multi-channel coil shunting and spaced radiation state sorting device, a respectively independent color sensor photoelectric recognition and electromagnetic egg pocketing device separation device, an obliquely scrapping, egg collecting and separately storing device and the like, high-speed and precise female and male silkworm egg separation is realized, the purposes of not damaging the silkworm eggs and maintaining the activity of the silkworm eggs are achieved, and labor is also greatly reduced.

The invention discloses a hydraulic support remote control system based on EtherCAT. The hydraulic support remote control system based on EtherCAT comprises a physical layer, a dielectric layer and a system control layer. The physical layer comprises a coal cutter, hydraulic supports and a scraper conveyer, wherein the coal cutter, the hydraulic supports and the scraper conveyer are arranged on a working fully mechanized face. The hydraulic supports are provided with a plurality of hydraulic cylinders and sensors. The dielectric layer comprises a plurality of solenoid valve sets, data collectors and operating panels. Each solenoid valve set, each data collector and each operating panel correspond to one hydraulic support in the physical layer. The system control layer comprises two master controllers, a plurality of I/O controllers and an EtherCAT bus used for transmitting very long instruction control words of the hydraulic supports, and the two master controllers and the I/O controllers are connected through the EtherCAT bus. The hydraulic support remote control system based on EtherCAT ensures real-time performance of remote control, provides big data transmission, and is low in development difficulty and high in reliability.