47results about How to "Regulated output voltage" patented technology

The utility model relates to a brushless direct current generator with hybrid excitation double salient, belonging to double salient motor, which comprises a stator and a rotor, wherein, the stator is composed of a stator core (1), a permanent magnet (2), a magnetizing coil (3) and the armature windings (4),(5),(6); the rotor comprises a rotating shaft (6), a rotor core (7); the yoke of the stator is provided with more than two groups of permanent magnets with symmetrical distribution, moreover the number of each group is more than two, and the neighboring permanent magnets are separated by three stator poles; meanwhile the magnetizing coil with symmetrical distribution is arranged outside the permanent magnets. The utility model has no additional air gap; the magnetic potential of the permanent magnet and the magnetic potential of the excitation make parallel connection so as to avoid the permanent magnet being demagnetized by the magnet potential of the electric excitation. A plurality of sets of armature windings output a plurality of channels of direct current after the rectification; wherein the output of the armature winding (4) sleeved on the stators between the permanent magnets can provide the power supply for the own excitation coil (3) of the motor, which makes the entire motor work in an independent electricity generation condition; therefore the utility model is in particular suitable for the wind power generation situation and other separate supply application situation.

The invention discloses a light-emitting diode driving system and a circuit thereof for controlling a direct current voltage converter to provide a regulated output voltage to the input end of a light-emitting diode array, wherein the light-emitting diode array consists of a plurality of light-emitting diodes. In one embodiment, the light-emitting diode driving circuit comprises a plurality of current sources, a comparison circuit and a current setting circuit. The current sources are connected to the outputs ends of the light-emitting diode array and are constructed to provide currents passing through light-emitting diode groups respectively. The comparison circuit is connected to the plurality of output ends of the light-emitting diode array, and is constructed to produce a digital or analogue signal which represents the voltage supply state of the light-emitting diode array. In addition, the construction of the current setting circuit is to set the current values of the fixed current sources. The direct current converter regulates output voltages according to feedback signals.

The invention relates to a brushless parallel-structure hybrid excitation synchronous generator without an additional air gap. The generator is composed of two parts, namely a permanent magnet motor (18) and an electrical excitation motor (19), wherein the permanent magnet motor (18) and the electrical excitation motor (19) are coaxially arranged in a shell (14) in parallel, the magnetic circuitsof the two parts are mutually independent, and an armature winding (5) is arranged in the stator core of the two parts. A triphase or multiphase exciting winding (10) is also arranged in an electrical excitation stator core (13), and an electrical excitation rotor (11) is a smooth cylinder formed by laminating round silicon steel sheets. The purpose of changing total electromotive force and output voltage is realized by changing current and phase in the exciting winding (10) by a frequency converter to regulate the magnitude and phase of the electrical excitation induction electromotive forcein the armature winding (5). Because the electrical excitation part is not provided with an additional air gap, magnetomotive force required by electrical excitation is small, and the regulation efficiency of the magnetic field is high. The electrical excitation magnetomotive force does not cause irreversible demagnetization to a permanent magnet, and brushless AC excitation is adopted to improvethe reliability of the motor.

Disclosed is a winding type asynchronous motor without a bearing. The winding type asynchronous motor without the bearing comprises a stator and a rotor, wherein a stator groove is formed in the stator, three phases of torque windings and three phases of suspension windings are installed in the stator groove, a rotor groove is formed in the rotor, three phases of rotor windings are installed in the rotor groove, the number of poles of each phase of the torque windings is 4, the number of poles of each phase of the suspension windings is 2, the number of poles of each phase of the rotor windings is 4, and the three phases of the torque windings in the stator and the three phases of the rotor windings in the rotor use current input of the same characteristic frequency. Compared with a squirrel cage asynchronous motor without the bearing, the winding type asynchronous motor without the bearing can generate large radial force and stable torque. The winding type asynchronous motor without the bearing can be set in a double feed type, can be used in the wind power generation field, is of a winding type structure, can add frequency converters in the winding type windings so as to achieve automatic adjustment, can achieve constant frequency power generation at different rotation speeds, meets requirements of electricity loads and grid connections, saves energy and protects environment, and is high in efficiency. The invention further discloses a corresponding manufacturing method of the winding type asynchronous motor without the bearing.

The invention provides electronic equipment, which is applied to the technical field of computers. The electronic equipment comprises a shell, a USB (Universal Serial Bus) interface, a power supply device and a switching device. When the electronic equipment is powered off, a user can connect or disconnect the power supply device with the USB interface through the switching device, so that external electronic equipment can be charged by the USB interface when the electronic equipment is powered off. The electronic equipment is further provided with a voltage adjusting device, so the output voltage of the USB interface can be further adjusted, various charging choices can be provided for users, and the charging function of the electronic equipment under various voltages is further realized.

The invention discloses a mass spectrometer power circuit with adjustable radio frequency, which is formed by a programmable signal source circuit, a drive circuit, a radio frequency voltage transformation circuit, an impedance transformation circuit and a controlled voltage source circuit, and is characterized in that the programmable signal source circuit outputs a high-frequency signal, the high-frequency signal is amplified through the drive circuit to drive a switch tube of the radio frequency voltage transformation circuit, the on and the off of the switch tube can enable a high-frequency transformer connected with the switch tube to primarily produce periodic current change, and changed current is coupled through a radio-frequency transformer to secondary output. One path of high voltage output secondarily is transmitted to a load quadrupole rod and provides high-voltage radio-frequency voltage for the load quadrupole rod. The other path of the high voltage output secondarily is transmitted to the impedance transformation circuit. The impedance transformation circuit converts a high-voltage alternating current signal into a low-voltage direct current signal and transmits the low-voltage direct current signal to a feedback end of a controlled voltage source. A radio-frequency power supply can set the frequency of a signal source through software and adjust the output voltage of the controlled voltage source through a potentiometer so as to achieve the aim of controlling the frequency and the output voltage of the radio-frequency power supply.

The invention provides a spiral contact voltage regulator. The spiral contact voltage regulator comprises a support, an iron core, a coil bobbin and a coil, wherein the iron core is sleeved with the coil bobbin, and the coil is spirally wound around the coil bobbin. The coil bobbin is installed on the support, and the coil bobbin and the support are in axial limiting and can be matched in a rotating mode in the circumferential direction. The support is provided with an operating mechanism used for driving the coil bobbin to rotate. A fixed electric brush carrier is installed on the support and provided with a fixed electric brush. The fixed electric brush is located on one side of the coil bobbin and makes tight contact with the circumferential side of the coil. A movable electric brush carrier is arranged outside the coil and provided with a movable electric brush, the head of the movable electric brush is provided with a slide groove, and the coil is embedded in the slide groove. The movable electric brush and the rotating coil are in longitudinal slide fit. According to the spiral contact voltage regulator, the problem that electric brushes bear two to three turns of voltage is eliminated by simply pressing one turn of coil on the corresponding electric brush; the electric brushes are made of copper or copper alloy, and therefore the voltage regulator will not be short-circuited; besides, the contact resistance and consumption between the voltage regulator and the electric brushes are lowered, and the voltage regulator breaks through the technical bottleneck that the electric brushes need a large current.

The invention discloses a DC power system. The DC power system comprises an AC power distribution module, a rectification module and a DC power distribution module, wherein an input end of the AC power distribution module is connected with an AC power supply, an output end of the AC power distribution module is connected with an input end of a circuit breaker module via an AC input wiring unit, anoutput end of the circuit breaker module is electrically connected with an input end of the rectification module, an output end of the rectification module is electrically connected with a busbar module, the busbar module is connected with a load unit, the rectification module comprises a power factor correction (PFC) and a DC/DC control unit, an output end of the PFC control unit is electricallyconnected with an input end of the DC/DC control unit, the output end of the rectification module is also connected with an input end of the DC power distribution module, an output end of the DC power distribution module is connected with the busbar module, and an input-output end of the rectification module is connected with an input-output end of the monitoring module. By the DC power system, the harmonic pollution can be reduced, the electric energy quality is improved, meanwhile, the high-power electric energy can be improved, and the demand of each occasion is satisfied.

The invention relates to a magnetic isolation feedback circuit of a space power supply. The magnetic isolation feedback circuit comprises a magnetic isolation modulation circuit composed of a secondary side error amplification electric appliance EA, a high-frequency small-signal transformer Tc and a controlled driving current source iC, a demodulator composed of a sampling switch SH and a holdingcapacitor CH, and other functional circuits. The output voltage Vout of the converter and a reference VREF in an error amplifier EA are subjected to error amplification to generate a control signal VEA, and the control signal VEA is subjected to magnetic coupling transmission through a signal transformer TC periodically excited by a driving current source iC controlled by an external driving signal. A primary side control signal V * EA is formed after a sampling switch on the secondary side of a transformer, SH and a sampling/holding circuit composed of a holding capacitor bank CH, then the primary side control signal V * EA is compared with a high-frequency sawtooth wave VRAMP signal in a PWM comparator to generate a pulse width modulation PWM logic level, and PWM is sent to a switching device driving electrode of a main power circuit after the driving capacity of PWM is improved through a gate driving circuit. The duty ratio adjusting circuit is used for adjusting the duty ratio D ofa switching device so as to adjust the output voltage.

A self-adaptive power supply voltage regulating circuit comprises an RC filter, the RC filter comprising a resistor and a capacitor which are connected in series, the first end of the resistor being coupled with a power supply voltage end, the second end of the resistor being an output end, and the power supply voltage end being used for providing power supply voltage; and a shunt module, connected with the resistor in parallel so as to provide shunt branches between the power supply voltage end and the output end, and the number of the shunt branches being adjusted according to the voltage difference between the two ends of the resistor so as to adjust the output voltage of the output end. According to the scheme, self-adaptive adjustment of the power supply voltage can be realized, so that the output voltage is stabilized within a proper range, and particularly, normal operation of electric devices of which the power supply voltage needs to be switched among a plurality of voltage domains is ensured.

A power source voltage stabilization compensator comprises a filtering unit, a charging current limiting module, a super-capacitor set and a voltage stabilization module, wherein the filtering unit conducts clutter filtering on an input power source and outputs a standard voltage signal; the charging current limiting module receives the standard voltage signal, conducts current limiting processingand provides a charging power source; the super-capacitor set is used for storing electric energy of the charging power source and outputs first voltage and second compensation voltage; and the voltage stabilization module conducts voltage stabilization on the first voltage and outputs first compensation voltage. When start of a vehicle engine or other reasons lead to instant drop of power supplyvoltage, the power source voltage stabilization compensator is used for providing power source compensation for equipment already in a working state and guarantees normal power supply of the workingequipment.

The invention discloses an electric vehicle high-power flexible distribution group charging system, and belongs to the technical field of electric vehicle charging control. The system comprises a maincontrol module, a control circuit module and a feedback module, and the system further comprises a rectification module, a phase shift circuit module and a discharge module which are connected in sequence. The discharge module comprises a plurality of discharge units. The main control module is in bidirectional connection with the control circuit module, and the output end of the control circuitmodule is connected with the rectification module and the phase shift circuit module. The output end of the phase shift circuit module is connected with the feedback module, and the output end of thefeedback module is connected with the main control module. According to the invention, the requirement of simultaneous charging of a plurality of electric vehicles can be met, the output power of eachdischarging unit can be adjusted in real time according to the charging requirement, the charging efficiency is improved, and the system is more reasonable and intelligent.

The invention discloses a control method of an intelligent control system based on automatic detection and adjustment of a power output, comprising the following steps: the data acquisition module collects the output data of a UV LED driving module from time to time, transmits the collected data to the data analysis processing module, and transmits the processed data to the MCU processing module.The MCU processing module processes the received data, compares the received data with a set parameter, and performs corresponding operation according to different comparison results. The invention has the following beneficial effects: the independent control of the output power, the output voltage and the output current of multiple UV LED lamps can be achieved by mutual cooperation of the respective modules, the working state of each UV LED lamp can be simultaneously monitored in real time, and protection of each UV LED lamp and a UV LED curing device is achieved.

The invention relates to a power module output voltage adjusting method and device. The power module has a voltage output terminal, the voltage output terminal is connected to a first resistor, and the adjusting device includes a DA converter connected to the voltage output terminal through a second resistor and a controller connected to the control terminal of the DA converter and controlling theDA converter to output a variable voltage. The structure is simple and reliable, the adjusting effects are good, the needed hardware cost is low, the production cost of the equipment can be reduced,and the application range of the power module is widened.

The invention relates to a control circuit, a switching power supply and electronic equipment, and the control circuit comprises a first switching circuit having a control terminal used for receiving a control signal of a control system, a second switching circuit having a control terminal connected with a second end of the first switching circuit and a first end connected with a ground terminal of a PFC circuit, and a voltage regulating circuit connected with the PFC circuit, the second end of the second switching circuit and the ground terminal of the PFC circuit; and the resistance value of the voltage regulating circuit is in positive correlation with the output voltage; the first switching circuit and the second switching circuit are used for selectively conducting the control signal to the control path of the voltage regulating circuit under the control of the control signal so as to regulate the resistance value of the voltage regulating circuit, so that the regulation of the output voltage of the output end of the PFC circuit can be realized, and the standby power consumption can be further reduced.

The invention relates to a switching power supply circuit which comprises a voltage multiplying circuit, an inductor connected to a power supply, a memory capacitor, at least one second switch and a control switch, wherein the voltage multiplying circuit comprises a power output line and at least one first switch. The control circuit controls the first and second switches and a first time period,within the first time period, both the first and second switches are closed, and the length of the first time period is adjusted to adjust an output voltage of the switching power supply circuit. Theswitching power supply circuit serves as a mini high-efficiency boosting adjuster, the capacitor provides a primary boost effect, and the inductor is used for further adjustment and boosting. Non-overlapped clock signals are not needed, and compared with a boost circuit, the size of the inductor can be reduced, the volume is reduced and the circuit structure is compact.