12 results about "Voltage regulator" patented technology

The invention discloses a feedforward-feedback composite control method and a control system for the pressure and the liquid level of a nuclear power station voltage stabilizer. A voltage stabilizer liquid level set value is recalculated; a new voltage stabilizer liquid level set value is only relevant to the average temperature set value of a loop cooling agent at current power and zero power; mismatched signals of primary loop reactor power and a secondary loop stream turbine power are taken as feedforward signals, and are introduced into a pressure and liquid level control system of the voltage stabilizer, thereby forming a feedforward-feedback consistency control scheme; the liquid level and the pressure of the voltage stabilizer can be subjected to corresponding compensation control in advance, so that the control effect of the voltage stabilizer is enhanced, the voltage stabilizer can reach a stable state more rapidly, and the stability of a pressurized water reactor nuclear power unit during frequency and peak load modulation is further enhanced.

The invention relates to a portable rechargeable direct-current electric welding machine. A battery pack is connected to the outside of a shell and comprises a positive main wire, a positive sub-wire, a negative main wire and a negative sub-wire, wherein the positive main wire of the battery pack is connected with a weld handle connection terminal; the weld handle connection terminal is connected with a switch; the switch is connected with a voltage stabilizer; the voltage stabilizer is connected with a control panel; the control panel is connected with the voltage regulator; the voltage regulator is connected with the current regulator; the current regulator is connected with a contactor; the contactor is connected with a welding voltage meter; the welding voltage meter is connected with a welding current meter; the welding current meter is connected with the weld handle; the negative main wire of the battery pack is connected with a ground wire terminal; and the negative sub-wire of the battery pack is connected with the voltage stabilizer, the control panel, the voltage regulator, the current regulator, the contactor, the welding voltage meter and the welding current meter respectively. The portable rechargeable direct-current electric welding machine has low cost, is convenient to assemble, disassemble and carry, is not limited by a power supply, can work anytime and anywhere.

A design structure. The design structure includes: a first set of FETs having a designed first V_t and a second set of FETs having a designed second V_t, the first V_t different from the second V_t; a first monitor circuit containing at least one FET of the first set of FETs and a second monitor circuit containing at least one FET of the second set of FETs; a compare circuit configured to generate a compare signal based on a performance measurement of the first monitor circuit and of the second monitor circuit; a control unit responsive to the compare signal and configured to generate a control signal regulator based on the compare signal; and an adjustable voltage regulator responsive to the control signal and configured to voltage bias wells of FETs of the second set of FETs, the value of the voltage bias applied based on the control signal.

A kind of illuminate device light controls multiple functions natural lamp with the natural wind energy and the solar energy generating electricity. It is at the outside of hollow hexangular base circular holder pipe makes the four-groove vertical revolving tray, inner gear mission, pillow, 100W DC generator, hexangular surface shape big lamp screen, solar energy battery plate, steady flow voltage regulator, charging bomb, light controller, and the energy-saving bulb connected in sequence assemble. The charging bomb inlet wire positive and negative electrode connect with the output positive and negative electrode line of the 100W DC generator and the solar energy battery plate and the charging bomb's output positive and negative electrode line connects with the energy-saving lamp supplying electricity among of them connecting the light controller in series. When there is the wind and the solar the 100W DC generator and the solar energy battery plate supply the electricity for the charging bomb at the same time; when there is no wind and solar the charging bomb supplies the electricity for the energy-saving lamp supplying electricity circuit. Among them it connects the light controller in series and the ray of light is strong so the light controller cuts the energy-saving lamp supplying electricity circuit automatically; at night there is no light so the light controller will turn on the energy-saving lamp supplying electricity circuit automatically.

A circuit that detects the power supply voltage requirement of each voltage domain in an IC includes 1) a ring oscillator in each voltage domain, and 2) a power module. Two different circuit implementations of the power module may provide a precise reference voltage to on-chip voltage regulators (LDO or DC-DC switching buck converter). The power module supports DVFS and can provide the desired power supply voltage for advanced CMOS technology nodes (45 nm and beyond) in less than 100 ns. The voltage detection circuit clamps the voltage to the desired level to address power supply voltage variations due to PVT and ageing. The proposed technique has minimal power and area overhead to compensate for the power supply voltage variation, thus reducing power supply voltage margins which yields higher power saving.

The invention discloses an all-in-one transformer comprehensive test system, which comprises a pull rod type operation case, a central processing unit, a direct current generation module, a direct current switching module, an alternating current generation module, an alternating current switching module, an alternating current and direct current measurement module, a complete machine protection module and a man-machine interaction module. The pull rod type operation case serves as an instrument carrier, the man-machine interaction module is connected with the central processing unit, and the central processing unit is in interactive connection with the direct current generation module, the alternating current and direct current measurement module and the alternating current generation module; the system is integrally designed, pull rod operation and wiring are simple, transformer direct-current resistance testing, on-load tap-changer testing, transformation ratio testing and residual magnetism demagnetization can be completed for a main transformer of a power system through one-time wiring, short-circuit impedance testing can be completed only through one-time wire reversing, an external voltage regulator is not needed, five functions are truly integrated, field use is greatly facilitated, and manpower and material resources are saved.

The invention discloses a power supply screen input comprehensive test board characterized by comprising a first power supply input end Uin1, a second power supply voltage input end Uin2, a first power supply output end Uout1 and a second power supply output end Uout2; the first power supply input end Uin1 and the second power supply voltage input end Uin2 are used for being connected with an external power grid; and the first power supply output end Uout1 and the second power supply output end Uout2 are used for connecting a first path power supply input end and a second path power supply input end of a power supply screen, wherein the first power supply input end Uin1 is provided with a firing wire end which is sequentially connected with a three-phase circuit breaker QF11, an automaticvoltage regulator TYQ1, a three-phase circuit breaker QF12 and a contactor KM11; and the second power supply input end Uin2 has a firing wire end which is sequentially connected with a three-phase circuit breaker QF21, a manual voltage regulator TYQ2, a three-phase circuit breaker QF22 and a contactor KM21. According to the invention, the detection functions of overvoltage, undervoltage, phase dislocation and phase loss of the input power supply of the power supply screen can be realized through different functional modules, and the test board has important practical significance.