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 relates to a voltage regulation ratio detection method of a distribution transformer. The method comprises the steps that the initial distribution transformer voltage regulation ratio iscalculated according to the primary side input voltage amplitude, the secondary side current amplitude and the secondary side current phase value of the distribution transformer; according to a voltage standard value and the instantaneous effective value of the secondary side output voltage of the distribution transformer, a voltage deviation value is acquired; if the voltage deviation value exceeds a preset voltage deviation threshold, the difference between the voltage deviation value and the preset voltage deviation threshold is acquired; the difference is integrated to acquire an integralvalue; and the voltage regulation ratio of the distribution transformer is acquired by compensating the initial distribution transformer voltage regulation ratio according to the integral value. Themethod provided by the invention improves the switching speed and accuracy of the voltage regulation ratio of the distribution transformer, can quickly and accurately control a power electronic switch, can effectively adjust the output voltage of the distribution transformer, and provides a foundation for the design of the power electronic on-load voltage regulation distribution transformer.

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 belongs to the technical field of electrical connection devices and discloses a waterproof socket with the adjustable voltage, and a plug. The socket comprises a socket housing, a powersupply coil and a magnetic core; the power supply coil and the magnetic core are arranged in the socket housing; the magnetic core penetrates through the power supply coil, and the power supply coil is connected with a power supply circuit; and the socket further comprises a coil traction device arranged in the socket housing, and the coil traction device can adjust the position of the power supply coil. The plug comprises a plug housing, a power receiving coil and a magnetic core; the power receiving coil and the magnetic core are arranged in the plug housing, the magnetic core penetrates through the power receiving coil, and the power receiving coil is connected with a load current. The socket and the plug are waterproof in all directions and can be plugged for use underwater; and the output voltage of the socket can be adjusted according to the using requirement, and different voltages are provided.

The invention relates to a software-controlled base line regulating circuit. The software-controlled base line regulating circuit comprises a basic divider branch, a PWM-controlled parallel branch, an active low-pass filter circuit and a signal operation circuit; the basic divider branch comprises two direct-current divider resistors which are connected in series, the PWM-controlled parallel branch is connected with one of the direct-current divider resistors in parallel, and the active low-pass filter circuit and the signal operation circuit are sequentially connected to the middle point of the two direct-current divider resistors; the PWM-controlled parallel branch is provided with a resistors Rp and MOSFET which are connected in series, on-off of the MOSFET is controlled by an external PWM signal, PWM duty cycle changes are controlled by software, and then the volume of output voltage of the base line regulating circuit is regulated. Compared with the prior art, the circuit is extremely simple and effective and low in cost, and the regulating range is easily designed to exactly meet the requirements without redundance.

The invention discloses a power supply circuit. The power supply circuit comprises a DC-DC module, an LDO module, a first voltage division circuit, a voltage-controlled constant current source and anamplification circuit. An output end of the DC-DC module is connected with an input end of the LDO module, the input end of the first voltage division circuit is connected with the output end of the DC-DC module, the output end of the first voltage division circuit is connected with a feedback input end of the DC-DC module, and the first voltage division circuit divides a voltage of the input endand outputs the divided voltage from the output end; a first set voltage is input into the input end of the amplification circuit, and the output end of the amplification circuit is connected with anoutput voltage control end of the LDO module; and a first end of the voltage-controlled constant current source inputs a second set voltage, a second end of the voltage-controlled constant current source is connected with the output end of the first voltage division circuit, and the voltage-controlled constant current source controls the current of the second end according to the voltage of the first end. By adjusting input signals of the voltage-controlled constant current source and the amplification circuit, input and output of the LDO module are controlled to have a stable voltage difference, and voltage signals with low power consumption and a low ripple noise are output.

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.

The invention discloses an electronic product board card conduction test device which comprises a base. A board card socket is arranged in the rear end of the top of the base. Limiting slots are symmetrically arranged on both sides of the board card socket at the top of the base. A limiting plate is slidably connected with the inside of each limiting slot. A return spring is fixedly arranged between one end of the inside of each limiting slot and a limiting plate. A lithium battery is embedded in the front end of one side of the base. A transformer is arranged on one side in the base. A knob switch is arranged on the upper end of the transformer at the top of the base. An LED display screen is embedded in the middle of the top of the base. A relay protector connected in parallel with the knob switch is embedded in the front end of the top of the base. A clamp slot is arranged on the other side of the top of the base. A test pen is clamped in the clamp slot. The device has the advantages of simple and reasonable structure design, convenient operation, convenient disassembly and assembly, low test cost, good effect, time and labor saving, safety, stability and wide application range,and is favorable for promotion and popularization.

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 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 live broadcast sound card voltage output control method and structure, and the method comprises the following steps: S1, obtaining a voltage input value signal of electric equipment, generating a reference feedback signal according to an input voltage value, and transmitting a control signal; and S2, controlling the connection or disconnection of a voltage regulation circuit according to the control signal so as to regulate the output voltage of the sound card. The structure comprises a receiving module which is used for receiving an input voltage signal of electric equipment; a comparison module which is used for generating a reference feedback signal according to the input voltage of the electric equipment and the output voltage of the sound card; and a controlmodule which is used for controlling each circuit switch in the adjusting module to be switched on or switched off according to the reference feedback signal so as to adjust the output voltage of thesound card. By adopting the technical scheme of the invention, the output voltage of the sound card can be adjusted according to the voltages of different electronic equipment connected with the soundcard when the working states are different, so as to meet the working voltage requirements of different electronic equipment.

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.

A two-stage DC-DC converter with a partial power regulation function, comprising: an input power supply; a primary conversion unit; an intermediate capacitor unit; a resonant conversion unit; an output rectification unit; and a load unit. The input power supply is connected to the ACF conversion unit, the intermediate capacitor unit is connected to the input power supply, the ACF conversion unit, and the output rectification unit, and the load unit is connected to the output terminal of the output rectification unit . The invention solves the problem of low efficiency of the traditional two-stage DC-DC converter, has high efficiency and high power density, and can meet different output voltage requirements.

The invention discloses a power-taking device based on an insulated overhead ground wire. The power-taking device includes: an autotransformer connected to a section of the wire to obtain a first current, and the first current is obtained after a voltage transformation process. A second current; a filter connected to the autotransformer, which filters the second current to obtain a third current; an electric gas valve connected to the filter, which generates a first airflow based on the third current ; The air pressure regulating valve connected to the electric air valve, based on the first air flow to stabilize the pressure, output a stable second air flow; the air motor connected to the air pressure regulating valve generates rotation based on the second air flow; A generator coupled to the air motor generates electrical current based on the rotation. The conversion of induced current-mechanical energy-current through insulated overhead ground wires solves the problem that the transformation ratio of the autotransformer cannot be too large, and the induced current is unstable due to changes in the load of the transmission line and the external environment.

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 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 two-stage DC-DC converter with a partial power regulation function. The two-stage DC-DC converter comprises: an input power supply; a primary conversion unit; an intermediatecapacitor unit; a resonant conversion unit; an output rectifying unit; and a load unit. The input power supply is connected with an ACF conversion unit, the intermediate capacitor unit is connected with the input power supply, the ACF conversion unit and the output rectification unit, and the load unit is connected to the output end of the output rectification unit. The two-stage DC-DC converterof the invention overcomes the problem that a traditional two-stage DC-DC converter is low in efficiency, has high efficiency and high power density, and can meet different output voltage requirements.

An adaptive power supply voltage regulation circuit, comprising: an RC filter, the RC filter includes a resistor and a capacitor connected in series, the first end of the resistor is coupled to the power supply voltage end, and the second end of the resistor is an output end, the power supply voltage end is used to provide a power supply voltage; a shunt module, the shunt module is connected in parallel with the resistor to provide a shunt branch between the power supply voltage end and the output end, and the shunt The number of branches is adjusted according to the voltage difference between the two ends of the resistor, so as to adjust the output voltage of the output terminal. The solution of the invention can realize self-adaptive adjustment of the power supply voltage to stabilize the output voltage within a suitable range, and is especially beneficial to ensure the normal operation of electric devices whose power supply voltage needs to be switched between multiple voltage domains.

The invention relates to a parallel structural hybrid excitation synchronous generator without an electrical excitation rotor, comprising a permanent magnet motor (17) and an electrical excitation part (18) which are coaxially arranged in a case (13) in parallel, wherein the two parts of magnetic circuits are independent; an armature winding (5) is respectively arranged in stator cores of the twoparts, and another three-phase or multiphase excitation winding (10) is arranged in the electrical excitation stator core (12); a magnetic conductive ring (11) is arranged at the inner circle of the electrical excitation stator core (12) to provide a pathway for an electrical excitation magnetic field and an armature magnetic field; and the size and the phase of current in the excitation winding (10) are changed through a frequency converter to adjust the size and the phase of the electrical excitation electromotive force in the armature winding (5), thereby reaching the purpose of changing the output voltage size. Because the electrical excitation part has no air gap, the required magnetic motive force of the electrical excitation is little and the adjusting efficiency of the magnetic field is high. Irreversible demagnetization to a permanent magnet cannot be caused by the electrical excitation magnetic motive force; and the reliability of the motor is high by utilizing brushless alternating current excitation.

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 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.

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.