33results about How to "Efficient and reliable control" patented technology

A highly reliable control device for an AC generator without using a transistor and diode having high withstand voltage is provided.A control device for a vehicle AC generator including a voltage control circuit that controls an output voltage of a rectifying circuit connected to a stator coil to a substantially constant level has a first active switch having its one end connected to one end of the field coil and having its other end connected a negative output terminal of the rectifying circuit, a second active switch having its one end connected to a positive output terminal of the rectifying circuit and having its other end connected to the other end of the field coil, a first passive switch connected between the negative output terminal of the rectifying circuit and a connecting point of the second active switch and the field coil, and a second passive switch connected between the positive output terminal of the rectifying circuit and a connecting point of the first active switch and the field coil, and the first and second active switches are on / off-controlled independently of each other.

The invention relates to the technical field of power electronic converters, and aims to provide a resonant power electronic converter and a converter device. The converter includes an input-stage rectifier circuit and a subsequent DC / DC circuit. The input-stage rectifier circuit includes three bridge arms, and each bridge arm is composed of upper and lower half-bridge arms. The midpoints of each bridge arm are respectively connected to The three-phase connection of the high-voltage AC power grid; each half bridge arm includes n module units, and the ports of each module unit are connected end to end to form a bridge arm structure. The high-frequency isolation of the input and output sides of the present invention eliminates the bulky low-frequency transformer, and realizes high-efficiency energy transmission and intelligent control at the same time. It can block the harmonic transfer between different power grids and the mutual influence of faults. At the same time, the output voltage range is very wide, and the continuous adjustment of current and voltage can be realized. Moreover, the collection of operating information of the converter system is simple and convenient. Multiple converter systems They can communicate with each other to realize smart grid.

The six-way valve claimed in the present invention includes a valve body and a valve core arranged in the cavity of the valve body, and six branch pipelines are connected to the valve body, wherein each branch pipeline is connected to the valve respectively. The cavity inside the body communicates; the valve core can rotate relative to the valve body, and the valve core includes two discs spaced apart from each other. There are two mutually independent cavities, and the valve core communicates with the branch pipeline by switching different cavities through relative rotation of the valve body. The invention uses the rotation of the valve core in the valve body to realize the switching between the six branch pipelines on the valve body and the three passages formed by the three cavities on the valve core. The six-way valve has high integration and simple control logic. , in order to realize the simplification of the connection control of the six branch pipelines on the valve body, and the control is efficient and reliable; at the same time, the overall size of the six-way valve is small and light in weight, which corresponds to the energy consumption required for the switching of the upper channels of the six-way valve Low.

The invention discloses a path generation and motion control method of a rail transfer stacker, which is applied to the control of a rail transfer stacker and a turnout mechanism. The system hardware is composed of vehicle-mounted PLC, conveyor line PLC, walking address recognition device, traveling driving device, track changing driving device, and track changing in-position sensor. The control method includes four parts: the generation method of the transition path, the detection method of the path conflict, the generation method of the transition command, the control of the turnout and the detection method of the path state. The method that the present invention proposes. The control method of the invention is based on the spanning tree to generate the path, realizes the control facing the path, greatly simplifies the program design and interactive data, and realizes the modular design of the stacker and the turnout mechanism. The interaction between the upper and lower computers is reduced, and the efficiency of the transfer operation is significantly improved.

The invention discloses a frost-less air-source heat pump hot water unit and a proportional-integral-differential control method for the same. The proportional-integral-differential control method includes performing computation according to received air temperature and humidity parameters, received air pressure parameters and received surface temperature parameters of an evaporator when outdoor temperature parameters which are transmitted by a temperature and humidity sensor and are received by a computation controller are lower than 0 DEG C, controlling the opening of an electronic expansion valve according to a computation result and regulating the surface temperature of the evaporator by means of increasing or reducing the opening of the electronic expansion valve so that the surface temperature of the evaporator is constantly higher than a frost formation point; and enabling a silicon-controlled power regulator to judge a suction superheat degree of a compressor according to received suction temperature and suction pressure of the compressor, increasing or reducing the power of an electric heater and maintaining that the suction superheat degree of the compressor only varies within a set value range. The frost-less air-source heat pump hot water unit and the proportional-integral-differential control method have the advantage that adjustment for the opening of the electronic expansion valve is matched with adjustment for the power of the electronic heater, so that the purpose of maintaining safe and efficient running of a system is achieved.

The invention discloses an SIM card control circuit of a single-chip dual-mode mobile terminal, which also comprises a virtual switch; a first power lead foot VCC of a first SIM card and a second power lead foot VCC of a second SIM card are respectively connected with the power lead foot VSIM of the SIM card controller; a first grounding lead foot GND of the first SIM card and a second grounding lead foot GND of the second SIM card are respectively connected with the grounding lead foot GND of the SIM card controller. The circuit and the method of the invention realizes automatically exclusive reading-writing of two SIM cards on the single-chip dual-mode mobile terminal under a set of SIM card control chips through employing some hardware devices and software control.

The invention discloses a switchover device for power distribution, which comprises: a base, in which are provided an accommodation cavity, a support pad, a sliding plate, a follower of a control handle, and three relays corresponding to each phase line of a three-phase power supply line , the first terminals of the controlled ports of the three relays are used to connect the phase lines of the three-phase power supply lines respectively; the second terminals of the controlled ports of the three relays are used to connect to the single-phase power supply lines; The control coil is used to connect the power distribution controller to automatically switch the power distribution state; a mechanical anti-short circuit mechanism for interlocking the actions of the three relays is formed in the base. There is no need for the control delay caused by the confirmation of the electronic control logic by the power distribution controller, thus solving the contradiction between the control delay and the confirmation of the correctness of the control logic during the power supply switching process of the unbalanced three-phase load, and ensuring the correctness of the control logic In addition, the control delay caused by electronic detection during the power distribution switching process is omitted, and the control is reliable and efficient.

The invention discloses a deformable observation device of a deep-sea underwater observation platform, and belongs to the field of deep-sea underwater observation. A pair of horizontal wings which can be deformed through rotating by an angle are arranged on the body of an underwater observation platform main body. The main structure is arranged inside a pressure-resistant shell, and a streamline fairing is externally arranged to improve the hydrodynamic performance. By combining complicated and changeable deep sea observation requirements and the characteristics of existing mainstream ocean observation equipment, the deformable observation device realizes switchover among multiple hydrodynamic profiles of the platform by adopting the active deformation of the platform horizontal wings, and the platform can be embodied with three typical observation modes, namely, the horizontal maneuvering mode, the vertical fixed-point mode and the zigzag gliding mode. The deformable observation device has a plurality of observation modes and can complete the platform integration of multiple observation means such as points, lines and planes, thereby improving the comprehensive observation capability of the platform, and the deformable observation device has bright application prospects.

The invention provides a method for controlling and adjusting the stitch distance on a sewing machine, which belongs to the technical field of garment manufacturing equipment. It solves the technical problems such as the inaccurate adjustment of the stitch distance of the existing sewing machine. The sewing machine includes a casing, a feed dog, a drive motor arranged on the casing, and a rotatable stitch length adjustment shaft. A swing rod is fixed on the output shaft of the drive motor, and a swing crank is fixedly connected to the end of the stitch length adjustment shaft. , the swing rod is connected with one end of the swing crank through the swing connecting rod, a needle distance scale plate with scale value is fixed on the casing, and the other end of the swing crank corresponds to the scale value on the needle distance scale plate. The control and adjustment method in the present invention can easily realize the adjustment of the stitch distance and the front and rear dense seams of the sewing machine, and at the same time realize some simple pattern seams through the electric control system.

The present invention provides an effective load control and processing system facing a satellite. The system comprises: a power supply module configured convert a 28V primary source to a positive 5V power supply for the usage of other function modules and realizing the cold-hot switching according to an external instruction, a first control module and a second control module configured to be responsible for the control realization of the effective load control and processing system facing a satellite, a main processing module configured to perform integration processing of digital signals and cold-hot backups, and a first preprocessing module, a second preprocessing module and a third preprocessing module which are configured to perform preprocessing of the intermediate-frequency signals and perform hot backups. The effective load control and processing system facing the satellite has high reliability and radiation hardening index and has high anti-single event effect capacity and the single event effect protection function, supports the real-time operation system and common communication interfaces and control interfaces of a plurality of loads, and has the functions of control, communication, remote measurement, redundancy backup and application software, etc.

The invention discloses a full-automatic high-pressure gas injection control system in the field of gas-assisted injection equipment. The system comprises a gas booster, a high-pressure gas buffer device, a gas drive device, a liquid drive pressure proportional flow valve, a liquid drive device, a gas drive liquid pump, a pressure signal transmission device and a heating device, wherein an electrical PLC (programmable logic controller) and a touch screen are integrated in a machine cabinet; the gas drive device is used for providing a drive gas source for the gas booster; an external low-pressure gas injection medium is connected to the gas inlet of the equipment; a heating device is arranged at the outlet of the gas booster; pressure transmitters are arranged at the inlet and outlet of the liquid drive pressure proportional flow valve respectively; the pressure transmitters and the proportional flow valve form a feedback closed-loop control system; the same set of gas drive device is shared by the proportional flow valve and the gas booster; the required output maximal pressure grade is set through a pressure adjusting valve of the gas drive device according to the pressure grade of the gas booster. The system has the advantages of high automated degree, diversity of products capable of being subjected to injection moulding, safety, reliability and the like.

A method for making and dispensing liquid or semi-liquid food products is implemented in a machine including a one containment tank for containing a liquid basic product, a processing circuit for that product, to obtain a liquid or semi-liquid food product, a dispenser for dispensing the food product, an actuator acting on the basic product and / or on the food product and / or on parts of the machine, and a user interface for controlling the making and dispensing. The method, implemented by a control and processing unit connected with the user interface, includes: measuring one or more operating parameters, activating a first data communication for obtaining the operating parameters, receiving the operating parameters, activating a second data communication with the user interface for receiving commands representing selectable settings of preparations, and controlling the actuator as a function of the operating parameters and commands received.