117 results about "Load bank" patented technology

An apparatus for dissipating energy into the exhaust gas of an internal combustion engine includes a container for confining a flow path for exhaust gas from an internal combustion engine where the container has an inlet and an outlet. A porous, electrically conductive mesh is placed in the container such that exhaust gas can flow through the conductive mesh. At least two electrical terminals are in permanent electrical contact with the conductive mesh. An electrical power supply completes an electrical circuit through the conductive mesh with the power supply having two or more electrical outputs electrically connected to an equal number of electrical terminals on the conductive mesh. The apparatus provides a filter, heater, electrical load and silencer.

An improved load bank system is provided. In one embodiment, the system includes control circuitry configured to provide duty cycle commands corresponding to a desired load. An input is configured to receive power from an electrical power system to be connected to the load bank system. At least one power resistor is selectively connected to the input. High speed solid state electronic switching circuitry is configured to rapidly switch according to the duty cycle command from the control circuitry in order to rapidly and sequentially permit current flow and prevent current flow through the resistor according to the duty cycle command. The effective resistance presented to an electrical power system to be connected at the input is thereby modified. Other load bank systems and load bank units are provided, as well as computer implemented and other methods for controlling a load bank system.

A transmit pad inspection device includes a magnetic coupling device, which includes an inductive circuit that is configured to magnetically couple to a primary circuit of a charging device in a transmit pad through an alternating current (AC) magnetic field. The inductive circuit functions as a secondary circuit for a set of magnetically coupled coils. The magnetic coupling device further includes a rectification circuit, and includes a controllable load bank or is configured to be connected to an external controllable load back. The transmit pad inspection device is configured to determine the efficiency of power transfer under various coupling conditions. In addition, the transmit pad inspection device can be configured to measure residual magnetic field and the frequency of the input current, and to determine whether the charging device has been installed properly.

A load controlled battery charging device is provided which is structured to apply an electrical charge to a plurality of rechargeable storage batteries having a wide range of voltage output capacities. The device includes an electrical charging circuit having an input connection to a power source to provide the power required to permit recharging the batteries. The load controlled charging device also includes a load bank structured to draw a substantially constant electrical current from the power input, and may include a rectifier to convert an alternating current power supply to a direct current to be applied to the rechargeable storage batteries. Additionally, the load controlled battery charging device includes a charging current output connection structured to interconnect the electrical charging circuit to the rechargeable storage battery, at least during the charging operation.

The invention discloses an extra-high-voltage current transformer verification system. The system comprises an intelligent power frequency power source, a multi-combination reactive power compensator, a multi-combination upflow system, a standard current transformer and a current transformer load bank. According to the invention, by use of a modern power electronic conversion technology according to which a three-phase-to-single-phase power electric electronic power supply and an electrical power supply are connected in series, an adaptive reactive compensation technology and an intelligent detection technology, load parameters of an extra-high-voltage GIS pipeline primary test loop are intelligently and efficiently analyzed, and reactive compensation is carried out automatically according to the load parameters, such that the capacities and the volumes of an onsite power supply and an upflow device are greatly reduced, integration and miniaturization of scattered detection devices are realized, the onsite verification capability and the work efficiency are improved, the cost of manpower and material resources is decreased, and the problem of incapability of detecting an extra-high-voltage current transformer according to detection regulations in a field is solved.

A 3-phase driven resistor load bank, electrically connected to an engine-generator-set is controlled to maintain a minimum generator load by turning ON and OFF load-bank heaters for optimal operation of the engine. An operator selects KW power output that best meets electrical load conditions and the load bank converts surplus electrical energy to heat, then cooled by the exhaust gas. The exhaust-gas-cooled resistive heater load bank, mounted in gas flow path, provides a dummy load to the gen-set which allows gen-set to operate at operator defined load level to enhance engine performance and reduce maintenance costs. The gas flow cools the inline resistive heater elements. The 3-phase AC power to the resistor load bank is only switched ON / OFF at zero-crossing points to eliminate electrical noise.

The invention discloses a multi-load wireless power transmission system with constant power and constant efficiency characteristics. The multi-load wireless power transmission system comprises a transmitting device and at least two receiving devices, the transmitting device is composed of a direct-current power supply, a full-bridge inverter, a transmitting side resonant capacitor module, a transmitting coil, a current sampling circuit, a zero-crossing comparator and a driver which are connected in sequence. The transmitting side resonant capacitor module comprises a transmitting side switch controller, a transmitting side communication module and at least two parallel switched capacitor branches, and each switched capacitor branch is formed by connecting a transmitting side switch and a transmitting side resonant capacitor in series; each receiving device is composed of a receiving coil, a receiving side resonance capacitor module and a load which are connected in series, and the receiving side resonance capacitor module comprises a receiving side resonance capacitor, a receiving side switch, a receiving side switch controller and a receiving side communication module which are connected in sequence. The method has the characteristics of constant power and constant efficiency, high system spatial freedom degree, high robustness, simple circuit structure and easiness in implementation.

A power system for an electrical system with highly fluctuating loads is powered by one or more power sources that are slow to react to load changes. The power sources are connected to electrical equipment used on the drill rig which provide active load to the generators. One or more load banks may be positioned to provide passive load to the generators to maintain generally constant generator load, while allowing for instant access to power as active load increases. Generators may be run at 100% capacity, a maximum efficient capacity, or at a high enough level to allow for a sufficiently rapid increase in power output. At least one parameter of a drilling operation may be utilized to anticipate load demand changes.

An inhalation component generating device includes: a power supply; a load group including a load configured to evaporate or atomize an inhalation component source by power from the power supply; an adjusting unit configured to adjust a value or waveform of voltage to be applied to the load; and a control circuit configured to be able to acquire a voltage value of the power supply. The control circuit performs: a process (a1) of acquiring a closed circuit voltage value of the power supply in a closed circuit state in which the power supply and the load group are electrically connected; and a process (a2) of controlling the adjusting unit based on the closed circuit voltage value.

A power system for an electrical system with highly fluctuating loads is powered by one or more power sources that are slow to react to load changes. The power sources are connected to electrical equipment used on the drill rig which provide active load to the generators. One or more load banks may be positioned to provide passive load to the generators to maintain generally constant generator load, while allowing for instant access to power as active load increases. Generators may be run at 100% capacity, a maximum efficient capacity, or at a high enough level to allow for a sufficiently rapid increase in power output. At least one parameter of a drilling operation may be utilized to anticipate load demand changes.

An electronic current managing system (ECMS) (10) that utilizes “phase control” to set the maximum current draw of an output load (28) that can consist of an inductive or a dynamic load. The ECMS (10) features a “soft start” that ramps the electric current from zero to full current over a two second period of time. The “soft start” eliminates high in-rush current or power surges from being applied to a system distribution panel or master breaker, thereby allowing a larger output load (28) than would otherwise be possible. The ECMS (10) includes an SCR (22) that causes a power control relay (20) to close or to open in the event the SCR (22) fails and the output load (28) attempts to stay “on”. An example of an ECMS (10) output load (28) is a self regulating cable which has a high in-rush current draw that is approximately three times the rated current per watt.

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.

The invention discloses a four-switch single-phase single-stage switch boost inverter circuit, and belongs to the technical field of power generation, power transformation or power distribution. The circuit comprises a first boosted circuit composed of a first inductor, a first diode, a first capacitor and a second diode, a second boosted circuit composed of a second inductor, a second capacitor,a third diode, a fourth diode and an inverter bridge, and an output circuit composed of a filter capacitor and a load. The whole circuit structure is simple, the power supply input current is continuous, the single-stage buck-boost characteristics of a switch inductor-capacitor unit and a quasi-switch boost network are combined, the higher output voltage gain is achieved, the load current is continuous, direct connection and open circuit immunity are achieved, the circuit can work in a direct connection state, and starting impulse current and impulse current at the moment when a switch tube isturned on do not exist in the circuit.

A virtual parallel load bank system is characterized by a load band connected in parallel with the source terminals of a voltage source to create a specific current to be applied to the terminals. The load bank includes a plurality of loads that are selectively connected in accordance with the desired current for the voltage source. One load device is designated as a master load and a communication network is connected with the load devices to enable the master load device to communicate with the other load devices to determine which are available for connection in the virtual load bank system.

An adjustable load bank provides a load to a power source that is able to maintain a constant power and constant current as well as power factor control. The load bank utilizes various resistive and inductive elements that may be connected or disconnected as required. In operation, the load bank continuously monitors the voltage and current across the resistive and inductive elements and applies or subtracts elements as necessary via control signals in order to maintain the desired fixed total power dissipated by the load bank.

The invention provides an extensible simple power source aging test instrument based on a basic resistor circuit, and belongs to the field of server power source aging. According to the extensible simple power source aging test instrument based on the basic resistor circuit, the basic pure resistor circuit is adopted, cement resistors which are large in power consumption and good in heat radiation with different resistance power consumptions are simply connected in parallel and series, different load circuits are obtained in a matched mode, different load combinations are selected through switches, and the effect of simulating a load environment is achieved. If it is necessary, an original circuit can be extended, and therefore the requirement for a larger load is met. The load environment of a power source can be well simulated, operation is simple, and an extensible function is achieved.

A method to control temperature of an engine of a generator system during a load test is provided. The generator system includes a generator, one of a liquid load bank and an air resistive load bank, a reversible fan, and a heat exchanger. The method includes heating of the engine to a pre-determined temperature with heat supplied by the liquid load bank and the reversible fan or by the air resistive load bank via the reversible fan.

The invention discloses a ship direct-current networking electric propulsion system which comprises a larboard direct-current bus and a starboard direct-current bus. A generator branch composed of a rectification unit and a generator set, a load branch composed of a frequency conversion unit and a load, and a transformer branch composed of a frequency conversion unit and a daily transformer are respectively led out from the larboard direct current bus and the starboard direct current bus, and a main circuit fuse is connected between the larboard direct current bus and the starboard direct current bus. The larboard direct-current bus and the starboard direct-current bus are each provided with a rapid protection unit, and the rapid protection units, the frequency conversion unit and the rectification unit are connected with the direct-current bus through branch fuses. The invention also discloses a short-circuit fault rapid protection method. When direct-current bus short-circuit fault and branch short-circuit fault happens in the system, a faulty half board or faulty branch is quickly cut off, so that the non-faulty half board or the non-faulty branch is prevented from undervoltage fault, and the system is prevented from shutdown and power failure.

A method for testing a circuit of a D.C. electrical system in a motor vehicle that includes connecting a load bank (30) to a D.C. electrical source such as a battery bank (24) or an alternator (26) and wirelessly operating the load bank (36) to set the load that the load bank imposes on the D.C. source during circuit testing.

An electric power distribution system includes a first path through which electric power is supplied from a DC / DC converter to a driven load to be driven in a load group; a second path connected in parallel with the first path and through which electric power is supplied from the battery to the driven load; a third path connected in series with the second path and connecting the DC / DC converter and the battery; a first switching circuit provided in the third path and switched to either ON state or OFF state; and a control unit switching the first switching circuit to either the ON state or the OFF state based on travel route information of a navigation system. The control unit switches the first switching circuit to the ON state according to a peak current of a load current of the driven load derived from the travel route information.

An integrated resistive load bank management system (500) uses a load bank (510) to control a flow of electrical energy to an electrically operated system (520). The load bank management system uses a resistive load bank to dissipate power from a generator set (505). The load bank management system can rapidly switch an electrical connection between a load bank and the generator set and the electrically operated system and the generator set. The load bank management system can provide an instantaneous increase in power to the electrically operated system and provide a short recovery time between power pulses provided to the electrically operated system.

The invention discloses an isolated semi-quasi Z-source DC boost converter, and belongs to the technical field of power generation, power transformation or power distribution. The circuit comprises a first-stage booster circuit composed of a first inductor, a fourth diode, a fourth capacitor and a fifth diode, a second-stage booster circuit composed of a second inductor, a first capacitor, a first diode and a three-switch inverter, and an output circuit composed of a transformer, a second capacitor, a third capacitor, a second diode, a third diode and a load. The whole circuit is simple in structure, the power supply input current is continuous, the buck-boost characteristic of a semi-quasi Z-source network is combined, the circuit has higher output voltage gain, load current is continuous, and the circuit has straight-through and open-circuit immunity, can work in a straight-through state, and does not have starting impact current and impact current at the switching-on moment of a switching tube.

A proportional heater controls a marine diesel powered generator with a diesel particulate filter (DPF). A proportional control is applied to the heater based upon exhaust temperature. The heater heats exhaust gas to a regeneration temperature to remove soot and sulphur from the processed gas when the diesel fuel has a sulphur content exceeding 1,000 ppm. The heater is supplied power via SCRs to reduce electromagnetic and radio frequency interference. A manual override permits the operator to set a temperature setpoint, force the heater to meet a certain temperature and establish a load bank for diesel engine electrical generator set.

The invention provides a linear full-voltage frequency conversion constant current circuit and an LED lamp equipped with the same. The linear full-voltage frequency conversion constant current circuitcomprises a rectifying circuit, a load assembly, and a first switch constant current tube IC1 and a second switch constant current tube IC2 which are symmetrically arranged, wherein at least one loadis connected with the output end of the rectifying circuit; the S end of the first switch constant current tube IC1 and the S end of the second switch constant current tube IC2 are connected to the input end of the load assembly; the D end of the first switch constant current tube IC1 is connected to the output end of the rectifying circuit through a charging-discharging capacitor C1; and the D end of the second switch constant current tube IC2 is connected to the output end of the rectifying circuit. By adoption of the two switching constant current tubes, and by controlling the capacitor toperform charging-discharging switching according to the alternating current voltage changes, the automatic frequency conversion and constant current functions are realized in the condition of a 90-300V alternating current full voltage; and in the charging-discharging switch process through the charging-discharging capacitor, the load assembly can work in a switching linear constant current state,thereby greatly improving circuit efficiency and the input power factor.

An inhalation component generating device includes: a power supply; a load group including a load configured to evaporate or atomize an inhalation component source by power from the power supply; and a control circuit configured to be able to acquire a voltage value of the power supply. The control circuit performs: a process (a1) of acquiring a closed circuit voltage value of the power supply in a closed circuit state in which the power supply and the load group are electrically connected; and a process (a2) of comparing the acquired closed circuit voltage value and a first reference voltage value, and determining that the power supply is in a small residual amount state in a case where the closed circuit voltage value is smaller than or is equal to or smaller than the reference voltage value.