58results about How to "Protect power" patented technology

The present invention discloses a wind driven power generator. The wind driven power generating system comprises: a) an aerodynamic unit rotatably mounted at the top of a tower having a certain height; b) a plurality of rudders for aligning the aerodynamic unit with the direction of wind, the rudders being radially formed on the outer surface of the aerodynamic unit; c) a horizontal shaft rotatably and horizontally mounted in the aerodynamic unit, wherein one end of the outwardly from the backend of the aerodynamic unit and the other end of the horizontal shaft remains inside of the aerodynamic unit and is provided with a first bevel gear; d) a blade attached to the rear end of the horizontal shaft, wherein the blade is rotated by the wind and thus rotates the horizontal shaft; e) blade variation means disposed at the rear portion of the aerodynamic unit for slanting the blade backwards and forwards, depending on the wind pressure; f) a power generator installed inside the tower; and g) a vertical shaft for transmitting the rotating power of the horizontal shaft to the power generator, wherein one end of the vertical shaft is provided with a second bevel gear, which is engaged with the first bevel gear, and the other end thereof is connected to a rotor shaft of the power generator.

Circuit and method for driving a gas discharge lamp having a bridge converter. The bridge converter includes a plurality of switches. A controller turns on and off the plurality of switches. The circuit further includes a zero current sensor circuit. The controller senses at least one voltage differential to control a length of time that at least one of the at least four switches is on. The controller controls when at least one of the plurality of switches is turned on in accordance with an output of the zero cross sensor.

The system disclosed herein is primarily utilized in the 23–48 volt DC telco, data center and industrial production industry. It will effectively replace today's requirement of purchasing, installing, maintaining and replacing chemical storage batteries. The solution will be capable of deployment partially and in full, inside the building, outside of the building in environmentally enclosed containers or in a mobile version. Additionally, the distribution voltage application will allow for reduction in the size of the power distribution wiring as well as creating an environment that requires less cooling of the critical equipment. This effectively leads to less infrastructure space and equipment, i.e. UPS, air conditioning units, static switch units, generators and chillers, for the same amount of processing, and significantly increases overall system reliability. The system regulates AC power and produces DC power that is considered uninterruptible and that is high quality in nature.

A protection circuit for a power amplifier connected as a negative feedback loop around the power amplifier. The negative feedback loop comprises a detector circuit, a driver circuit and an attenuator circuit. The detector circuit receives output voltage from the power amplifier and generates a signal when the output voltage exceeds a predefined threshold. The driver circuit filters the signal received from the detector circuit to maintain feedback loop stability and adjusts the feedback loop bandwidth and gain to provide a filtered signal. The attenuator circuit receives the filtered signal and attenuates the input voltage of the power amplifier to reduce the output voltage of the power amplifier to a level below the predefined threshold.

A circuit for a power amplifier includes a main amplifier stage having an operational amplifier (110), a buffer NPN transistor (126) and an NPN transistor (127) connected in a totem pole configuration, and a buffer PNP transistor (133) and a PNP transistor connected in a totem pole configuration. The transistors regulate the voltage to the components directly connected to the operational amplifier (110 ). A sampling resistor (137) located between a speaker (140) and an output of the power amplifier measures the current. The sampling resistor (137) is inside a negative feedback loop so that an output resistance will be near zero. A protection circuit includes a high common mode rejection difference amplifier that level shifts the sampling resistor voltage to a ground reference voltage. A precision rectifier full wave rectifies the current signal so that the current signal can he compared to a maximum current. If the instantaneous a circuit for a power amplifier includes a main amplifier stage having an operational amplifier, a buffer NPN transistor and an NPN transistor connected in a totem pole configuration, and a buffer PNP transistor and a PNP transistor connected in a totem pole configuration. The transistors regulate the voltage to the components directly connected to the operational amplifier. A sampling resistor located between a speaker and an output of the power amplifier measures the current. The sampling resistor is inside a negative feedback loop so that an output resistance will be near zero. A protection circuit includes a high common mode rejection difference amplifier that level shifts the sampling resistor voltage to a ground reference voltage. A precision rectifier full wave rectifies the current signal so that the current signal can be compared to a maximum current. If the instantaneous current exceeds the maximum current, the protection circuit turns off both the positive and negative power supplies.

A method of water capture by pin-pointing likely excess flow locations and preventing flood damage. Captured water into temporary storage such as tanks, reservoirs, fabric tube arrays, or available lakes, can ultimately provide fresh water augmentation in many regions. Captured water will be tested, treated as needed, reclaimed and identified into central online storage sites. Not needed excess flows would be released after storm season. By flood damage and clean up avoidance, it provides ultimate long term flood pollution abatement for homes, businesses, farms and communities of affected US waterways.

The invention discloses an intelligent power supply system for a new energy automobile. The intelligent power supply system comprises a power battery, a super-capacitor, a DC / DC (Direct Current / Direct Current) power converter and a motor, wherein the power battery is connected with the DC / DC power converter; the DC / DC power converter is connected with the motor; the battery is connected with the DC / DC power converter; and the motor is a dual-winding motor. According to the technical scheme of the invention, two kinds of power supplies are combined, the advantages of the two kinds of power supplies are brought into full play, and the power supplies are applied to a power supply system of a pure electric automobile, so that complete and continuous power supply is provided while a power supply source is protected.

The invention provides an electric automobile terminal used for an electric automobile comprehensive management and control system. The electric automobile comprehensive management and control systemcomprises a cloud server, the electric automobile terminal and a client terminal. Both the electric automobile terminal and the client terminal are in communication connection with the cloud server. Astate monitoring module used for monitoring the inner state of the electric automobile terminal and a communication module used for being in communication connection with the cloud server are arranged in the electric automobile terminal. The communication module sends monitored state data to the cloud server every preset time, so that the cloud server generates a notice according to the state data, and the notice is pushed to the client terminal. Various types of management and control data can be acquired from the electric automobile terminal, so that a user obtains the state of an electricautomobile in time, and the user experience is improved.

The present invention relates to an apparatus fixing power cable to insulator, which clamps the head of an insulator to fix power cable to the insulator head, easily and firmly. To this end, the apparatus in accordance with the present invention comprises; a main body formed with a vertical through bolt hole in the center, with a space, formed beneath the bolt hole, with round open bottom which holds power cable; a fixed clamp formed on one side of the main body with a latch at the bottom to hook insulator head; a movable clamp formed on the opposite side of the main body with a latch at the bottom to hook the other side of the insulator head; a movable, elastic holding member formed on the space part of the main body, with a groove on the bottom to hold upper part of power cable; a fixing bolt engaged in the bolt hole of the main body, pressing the elastic holding member by screwing inward, so that the power cable can be fixed between the holding groove on top of the insulator and the holding groove on the bottom of the elastic holding member; and a movable clamp fixing member to fix the movable clamp engaged with the insulator head.

A magnetic dent removal device (18), method and kit comprises a handle assembly (20) used with a burnishing element (24). The handle assembly (20) includes a handle (26), a containment cup (30) and a magnet (22) received within the containment cup (30). A magnet shield (40) is connected to the handle assembly (20), and a cover pad (38) can be attached to the magnet shield (40). A hooking element (64) can be attached to the handle assembly (20) to allow for the attachment of accessory components to aid in dent removal. An amplification bar (56) can be attached to the hooking element (64) to add strength to the magnetic force. A kit (74) for dent removal includes a carrying case (76), at least one handle (26), at least one magnet (22), at least one burnishing element (24) at least one cover pad (38), and at least one magnet shield (40).

Embodiments of the present application disclose a power amplifier protection circuit, communication device, and method, to protect a power amplifier when an abnormal signal, such as a bun or a pulse, occurs in a circuit. The method according to an embodiment of the present application comprises: detecting and comparing, by an input detection circuit, an abnormal signal in an input signal, outputting a protection control signal, and after processing performed by a delay circuit, controlling a power amplifier to be in an off state in a pulse width of the delayed protection control signal, so that the abnormal signal passes through the power amplifier when the power amplifier is in the off state, thereby preventing the power amplifier from burning, and achieving the effect of protecting the power amplifier.

A substrate treatment apparatus includes a lower electrode, an upper electrode, a first AC power supply that is connected to the upper electrode and supplies AC power at a first frequency, a second AC power supply that is connected to the upper electrode and supplies AC power at a second frequency which is lower than the first frequency, an internal electrode provided in the lower electrode, a filter circuit connected to the internal electrode, and a DC power supply connected to the internal electrode via the filter circuit. The filter circuit includes a first filter circuit that becomes low impedance with respect to AC power at the first frequency compared to AC power at the second frequency, and a second filter circuit that becomes low impedance with respect to AC power at the second frequency compared to AC power at the first frequency.

An method and apparatus testing an alternator and / or starter assembly including a power source for energizing the alternator and / or starter, a computer processor for monitoring electrical current supplied to energize the alternator and / or starter wherein the computer processor also monitors electrical voltage across the alternator. The invention also includes a first switch coupled to the computer processor which is enabled if excess current is required to energize the alternator; a second switch coupled to the computer processor which is enabled to place a heavy load on an output of the alternator if the voltage exceeds a maximum limit; a third switch coupled to the computer processor which is enabled if the current supplied to energize the starter exceeds a maximum limit.

A protective roll-back cover for an electronic device is provided. The roll-back cover is suitable for use in association with an iPad®, Kindle®, Nook®, a cell phone, a reader, a tablet or other similar electronic devices. The device has a protective cover which rolls from a closed First Position A to an open Second Position B. In the closed First Position A, the screen of the electronic device is covered and protected. In the open Second Position B, the protective cover is rolled back into a storage area and a user may access the screen of the electronic device. The device further has a removable additional storage compartment(s), a rotatable stand, a sun screen and a movable storage area for storing a stylist.

A power drill has a rotatable spindle extending from a power-unit housing, a chuck body rotationally fixed to the spindle, a jaw guide carried on the chuck body and rotatable relative thereto about the axis, jaws carried in the chuck body, and a pusher element rotatable about the axis in the chuck body and fixed to and bearing axially on the jaws. Screwthreads between the pusher element and the spindle is effective to move the jaws radially on rotation of the spindle about the axis relative to the guide. A coupling sleeve rotationally fixed to the jaw guide is movable between a tightening position rotationally fixed to the housing for movement of the jaws by the pusher element on rotation of the spindle and a drilling position rotationally fixed to the spindle and rotatable relative to the guide for joint rotation of the guide, jaws, and spindle.

The specification discloses a weather-resistant surge protector plug for protecting an outdoor electrical device connected on its load side from spurious or excessive transient voltages or surges or both on an electrical line above a predetermined value, on its line side or its hot side. The surge protector plug contains, within the plug housing, an MOV and an on / off switch having a re-settable circuit breaker. The on / off switch acts to interrupt current to the device at the option of the user, and also to re-set the circuit breaker after the occurrence of an overvoltage condition. An indicator light indicates whether the switch is on or off. The plug housing is made of weather-resistant and materials and is further designed and constructed to be water or moisture resistant. An electrical circuit is are also disclosed. The lightning and surge protection as provided by this invention may also be rendered into a sold state chip device.

A shunt protection module and method for series connected devices use multiple shunt semiconductors and a control unit. The shunt semiconductors correspond respectively to multiple target devices. Each shunt semiconductor connects to a corresponding target device in parallel. The control unit connects to trigger terminals of the shunt semiconductors. Because each shunt semiconductor has a characteristic that with the higher voltage the trigger terminal is input, the lower the electrical potential difference between shunt terminals is, and the control unit outputs a trigger voltage that is equal to the electrical potential difference on at least two adjacent target devices to the shunt semiconductor corresponding to a failed target device, an electrical potential difference on the shunt semiconductor is low when it operates. The shunt protection module and method ensure providing high trigger voltage to the shunt semiconductor corresponding to the failed target device.

The invention provides an integrated management and control cloud server for electric vehicles. The cloud server is a server cluster; the server cluster comprises a data server and a management and control server; the data server is in communication connection with the management and control server; the cloud server is in communication connection with a plurality of electric vehicle terminals andin communication connection with a plurality of client terminals; and the electric vehicle terminals and the client terminals are in one-to-one correspondence. The invention provides a specific algorithm for judging state of charge, battery state and motor state of the electric vehicles based on parameters of the electric vehicle terminals so as to improve the accuracy of judging the current stateof the electric vehicles by a system and to avoid misinformation, thereby improving the user experience.

A foldable power strip having a pair of housing members having one or more outlets thereon and being rotationally connected together about a hinge or vertical axis. A power cord housing is also connected about the hinge or vertical axis to permit the housing members and power cord to be independently rotated relative to one another. The inside walls of the housing members may include side members that define a recess for receiving and protecting the power cord when the housing members are in the closed position.

The invention discloses a single-particle transient effect resistance circuit for an SCR pulse width modulator, which comprises an SCR pulse width modulator with an SCR structure, an RC buffer, a PNP-type triode Q1 and an NPN-type triode Q2. The RC buffer consists of a soft-start capacitor C1, a first resistor R1 and a second resistor R2, wherein R1 and C1 are connected in series between a reference voltage vref of the SCR pulse width modulator and a common ground; after R2 is connected in series with the Q2, they are connected in parallel with the two ends of the C1. The emitting electrode of the PNP-type triode Q1 is connected to the COM terminal of the pulse width modulator; the collecting electrode is connected to the common ground, and the base electrode is connected to the soft-start capacitor C1. The invention can prevent a working pulse-width modulator from discharging the soft-start capacitor when it encounters an SEU event and at the same time allows the time required for the charging of the soft-start capacitor when it is restarted to be consistent with the time for the charging of the soft-start capacitor when it is started normally.

The invention relates to a power protection device of a power network information machine room. The device comprises a surge-prevention circuit and a delay protection circuit, wherein the surge-prevention circuit comprises a piezoelectric resistor M1, a piezoelectric resistor M2, a piezoelectric resistor M3 and a gas discharging tube LT, the delay protection circuit comprises a time relay J1 and an AC contactor J2, an AC power supply passes through the surge-prevention circuit and then is connected with the time relay J1, the time relay J1 is connected with the AC contactor J2, the AC contactor J2 is connected with a self-recovery over / under-voltage module M4, the time relay J1 is connected with a GSM alarm, and the self-recovery over / under-voltage module M4 is used for sampling and processing the AC power supply and outputting the AC power supply to power utilization equipment of the network machine room. In the power protection device of the power network information machine room, the device is arranged in the network information machine room, an important effect of protecting a power supply of the network information machine room is achieved, and the device has the advantages ofreliability quality and reasonable design.

A waste-heat recovery system for a waste-heat source, made up of an ORC (Organic-Rankine Cycle) postconnected thereto. The waste-heat source is connected with the heating device of the ORC as well as an expansion machine, coupled to a generator, for steam expansion in the ORC, which has magnetic bearings with an associated control device and a power supply via a direct current intermediate circuit of a generator frequency converter. The design and safe operating behavior of a waste-heat recovery system made up of an ORC post-connected to a waste-heat source are optimized. In a power supply failure, the electric energy that a down-running generator continues to generate is used to supply the magnetic bearings with the associated control device in order to ensure a safe operation in the event of a power supply failure.

A fiber strap packing machine includes a main body. One side of the main body is provided with a fastening device, a cutting device, and a strap pressing device. The fastening device includes a power unit, a tension adjustment unit, and a strap rolling unit. The power unit is connected with the tension adjustment unit and the strap rolling unit. When the strap rolling unit is tightened by a fiber strap, the power of the power unit will be transmitted to the tension adjustment unit through the fastening device. The tension adjustment unit stops the power to be transmitted to the strap rolling unit so as to automatically adjust the tightness of the fiber strap and prevent the tightening device from being damaged by the external force and the power.

An electronic device and a power protection method are provided. The electronic device includes a transfer port, a switch, a first detecting unit and a second detecting unit. The transfer port provides a driving voltage to an external device. The switch is coupled between the transfer port and a supply power source, and the switch is selectively turned off according to at least one of a first control signal and a second control signal. The first detecting unit generates the first control signal when a voltage drop of the driving voltage exceeds a threshold voltage. The second detecting unit generates a sampling voltage by detecting the driving voltage and generates the second control signal when the sampling voltage is lower than a first reference voltage. The electronic device can provide a power protection when an external device is plugged in / out the transfer port.

The invention relates to a power source reverse connection protection circuit, which is composed of a single-pole double-throw relay K, a protection diode D1, a light emitting diode D2, a resistor R and a hummer H; when the circuit is in normal operation, that is, no power source reverse connection fault exists, a positive output end (3) of a power source is directly connected with a positive input end (1) of the power source; when the power source is in reverse connection, the single-pole double-throw relay K works to cut off the following circuits and lightens the light emitting diode D2, and meanwhile, the hummer H sounds to prompt the power source reverse connection fault for the user. The circuit is simple in structure, low in cost and obvious in warning of reverse connection fault, not only can protect the following circuits from being burnt out due to power source reverse connection, but also can efficiently restrain the current, so the function of power source protection can be achieved.

A substrate treatment apparatus includes a lower electrode, an upper electrode, a first AC power supply that is connected to the upper electrode and supplies AC power at a first frequency, a second AC power supply that is connected to the upper electrode and supplies AC power at a second frequency which is lower than the first frequency, an internal electrode provided in the lower electrode, a filter circuit connected to the internal electrode, and a DC power supply connected to the internal electrode via the filter circuit. The filter circuit includes a first filter circuit that becomes low impedance with respect to AC power at the first frequency compared to AC power at the second frequency, and a second filter circuit that becomes low impedance with respect to AC power at the second frequency compared to AC power at the first frequency.