115 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 system and method is disclosed for creating and/or maintaining an electrical load on a diesel engine generator for use on a marine vessel in order to avoid the harmful effects of no-load or low-load operation of the diesel engine. The parasitic load bank system 10 utilizes the heat transfer fluid 23 contained in the closed circulation loop 28 of a chille7d-fluid air conditioning system 14 for creating and/or maintaining the electrical load on the diesel engine generator 12 by utilizing a load bank controller 44 for diverting a portion 23c of the heat transfer fluid 23a being supplied to the vessel's air handlers 42 into heat exchange relationship with the heat transfer fluid 20b discharged from the air conditioning system's source of heat transfer 18 such that the heat exchanged heat transfer fluid 23f activates the source of heat transfer 18, which may be a chiller, reverse-cycle chiller or heat pump, to create an electrical power demand on the diesel engine generator 12.

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.

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.

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.

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.