33results about How to "Continuous current" patented technology

An electronic ballast for driving a gas discharge lamp includes an EMI filter, a bridge rectifier coupled to a DC bus without a conventional electrolytic capacitor, a passive valley fill circuit built as a network having 4 charge / discharge energy storage capacitors and 9 diodes (4C9C), and a resonant DC to AC high frequency inverter for powering gas discharge lamp. The 4C9D circuit divides the rectified peak voltage by four and the low output voltage of the circuit is used to provide continuous lamp operation. The result is a ballast having substantially improved power factor, total harmonic distortion, and current crest factor. The electronic ballast is provided with a dimming capability from a TRIAC based wall dimmer.

A power supply system uses improved Class G amplifier architecture for high bandwidth operation with low distortion. The power supply system switches between multiple power supply rails, depending on the signal level handled by the power supply system. The lowest usable supply rail voltage is chosen to minimize power dissipation in the output driver, thus optimizing efficiency. Each supply rail has an associated driver capable of sourcing current to the amplifier output. When a supply rail is selected, its associated driver is enabled and other driver(s) not associated with the selected supply rail are disabled via separate disable control signals. The disabling of the deselected driver may be delayed until current above a predetermined threshold is sensed at the output of the enabled driver. In addition, the frequency of switching between the power rails may be limited via various means designed to limit distortion in the power supply system.

The invention provides a rigid contact net expansion joint, which belongs to the field of rail transit equipment and solves the problems that the existing expansion joint has low compensation amount to cause high total manufacturing cost and the like. The rigid contact net expansion joint is arranged between two bus bars. The rigid contact net expansion joint is characterized by comprising a fixed joint and a movable joint which can conduct electricity; the fixed joint and the movable joint are used for fixing with the connecting end of one of the bus bars respectively; a guide piece with electric conductivity for connecting the fixed joint and the movable joint is arranged between the fixed joint and the movable joint; the fixed joint is fixed with the guide piece; the movable joint can move along with the guide piece; and a contact line 1 for transmitting current to an electric system of a train is fixedly arranged on the guide piece. The rigid contact net expansion joint is a plug-in expansion joint, and the adjacent two bus bars and the expansion joint are arranged on the same straight line, so the expansion joint is favorable for improving the utilization rate of the bus bars, equivalently improving the length of an anchorage section, and has large compensation amount.

The invention discloses a multi-variable equalization control method for a power battery, which includes establishing an equalizing circuit topology, collecting the voltage and current of a battery pack in a BMS; estimating the SOC value of the battery by using a UKF algorithm; calculating each battery cell according to the SOC value and determine the relationship between it and the equalization start threshold; if the difference is greater than the equalization start threshold, calculate the average state and difference of SOC and voltage and perform fuzzy control respectively to obtain the SOC average value and the equalization current value; The SOC mean value and the equalization current value are subjected to adaptive fuzzy control to obtain a PWM duty cycle; if the duty cycle is less than the equalization start threshold, the equalization control ends. Segmented hybrid control is carried out according to the working state of the battery, which effectively improves the difference of the battery pack, greatly improves the energy utilization rate of the battery pack, avoids the overcharge and overdischarge of the battery pack, and protects the safety of the battery.

The invention discloses an LED dimming circuit, which comprises a switching power supply, a voltage stabilizing module, an LED array, a sampling resistor, an adjustable feedback module and a microcontroller module. The voltage regulator module is connected to provide power and zero potential "ground"; the power output port of the voltage regulator module is connected to the positive interface of the LED array; the feedback input port of the voltage regulator module is connected to the voltage output port of the adjustable feedback module; the adjustable feedback module The voltage input port of the LED array is connected to the negative interface of the LED array, and is connected to one end of the sampling resistor at the same time; the other end of the sampling resistor is connected to the zero potential "ground"; the pulse input port of the adjustable feedback module is connected to the pulse output of the microcontroller module port connection. The invention can continuously adjust the brightness, has good linearity, no high-frequency flicker, and is convenient for intelligent adjustment and control in combination with various application software.

The invention relates to a novel static switch and a control method thereof, which belong to the technical field of electronic switches and solve the problems of power supply interruption, high trigger power and the like in the prior art. According to the novel static switch and the control method thereof, a detection method is improved on the basis of an AC static switching technology, and the original method based on voltage detection is changed into a method based on voltage and current detection; and since a first voltage detection module for detecting voltage and a first current detection module for detecting current are arranged between a first input AC power supply and a first bidirectional silicon controlled rectifier, and a second voltage detection module for detecting voltage and a second current detection module for detecting current are arranged between a second input AC power supply and a second bidirectional silicon controlled rectifier, the problem of power supply interruption when the input power supplies are asynchronous is solved, the problem that a load is burnt by two sinusoidal half-waves with the same polarity when the input power supplies are asynchronous is solved, the problem of power supply interruption when the input power supplies have an inductive load or capacitive load is solved, and the problems that the power is high, gates of the silicon controlled rectifiers emit heat and the service life of the device is reduces are solved.

An electrotherapy device includes a storage unit that stores code data in which a plurality of output frequencies are aligned in order of output and to which a code number is assigned and course data in which the plurality of code numbers are aligned in order of output and to which a course number is assigned, and a controller that extracts the course data from the storage unit based on the input course number, extracts the pieces of code data based on the extracted course data, and controls an output unit to output AC currents of the output frequencies in order based on the pieces of code data, wherein the output unit includes switches (ST1) to (ST4) configured to switch to any one of a first output circuit that outputs the AC currents to at least either of a pad electrode or a mat (12) in which a conductive wiring (12e) is arranged and a second output circuit that outputs the AC currents to a probe (13) having pin electrodes (13e).

The invention relates to an electronic throttle control simulation experiment system. The overseas research of the electronic throttle control system (ETCS) has over twenty-year history, the products prepared by manufacturers are beginning to be put on the market largely and the current generation of the electronic throttle products has been launched. The system of the invention comprises a control circuit, wherein the control circuit comprises a signal acquiring and processing circuit, a MCU, a power drive circuit, a DC motor control driver, an accelerator pedal position sensor (PPS) and an electronic throttle position sensor (TPS); the accelerator pedal position sensor and the electronic throttle position sensor are used to separately input the accelerator pedal control signal and feed back the throttle position signal, the A / D converter of the MCU converts an input analog signal to a digital signal, after the control algorithm calculates control quantity, the control signal is output from a high-speed outlet (HSO) and an I / O port, the DC motor driver outputs the power drive signal to control the rotation of the DC motor, thus realizing the control of the opening of the throttle. The invention is used in the electronic throttle.

The invention discloses a large-scale wind power generation system using contact electrification technology, which includes several power generation micro-units, circuit systems, and chassis; the power generation micro-units and circuit systems are arranged inside the chassis, and the circuit system is connected with the power generation micro-units; The micro-unit includes an upper substrate, an upper electrode, a lower electrode, and a lower substrate arranged sequentially from top to bottom; a vibrating film layer is connected between the upper electrode and the lower electrode, and the vibrating film layer can vibrate up and down and vibrate separately during the up and down vibration process. It is in contact with the upper electrode and the lower electrode; there are several elastic vertical walls between the upper electrode and the lower electrode; the circuit system includes several rectification circuit systems and external circuit systems, and the rectification circuit system converts the alternating current excited by the wind into direct current; The external circuit system connects several rectification circuit systems in series or in parallel. The large-scale wind power generation system using the contact electrification technology of the invention has the advantages of simple structure, small dead weight, high power generation efficiency, and reduces the cost of the power generation system.

Apparatus, systems, and methods for the treatment of bone, cartilage and other types of hard tissue. The treatments, which are suitable for extended treatment, include the treatment and prevention of pathologies through the controllable use of silver, iron, zinc, or magnesium ions. These pathologies may include a pathology which is at least partially induced or aggravated by an infectious disease, for example a bacterial disease. In this case the electrically released ions are silver ions, which are known to have antibacterial properties.

The invention discloses a parallel multi input coupled inductor buck and boost converter which belongs to the technical field of power electronic converting. The converter is composed of N boost circuits, a buck circuit (20) and a load, wherein N is a natural number more than one. Each boost circuit is composed of an input source, a filtering inductor, a switch tube, a diode and a filtering capacitor. The buck circuit is composed of a switch tube, a diode, a filtering inductor and a filtering capacitor. The output ends of N boost circuits are connected in parallel and then are connected with the input end of the buck circuit (20). The output end of the buck circuit (20) is connected with the load. The filtering inductors of N boost circuits are respectively coupled with the filtering inductor of the buck circuit. According to the converter provided by the invention, a number of input sources power the load at the same time; buck and boost converting between input and output is realized; the filtering inductors are coupled with each other; the converter has the advantage of small size; different input sources and the load side can be respectively and independently controlled; and the control is simple.