318results about How to "Reduce power supply" patented technology

The invention relates to an ant-pinch controlling method for the electric window of the automobile, which is characterized in that a sampling resistance and a magnifying filter circuit are adopted to obtain the armature current signal of a motor, and a divider resistance or an amplifier is adopted to obtain the armature voltage signal of the motor; a singlechip utilizes A/D to sample and filter to obtain the digital value of the armature voltage U and the electric current I, then a rotation speed n can be obtained according to the functional relationship between the motor speed n and the armature voltage U and the electric current I; the rotor position can be obtained by calculating the integral of the rotation speed, and thereby the position q of the electric window glass can be obtained; on the other hand, the singlechip can judge if the motion of the electric window glass is obstructed according to the current I; Whether the electric window glass reaches the top or nips foreign matter can be distinguished according to the motion condition and the glass position q, then the electric window glass can be lifted, lowered or stopped by comprehensively analyzing the external instruction. The method provided by the invention has the advantages that the method is simple and practical; an anti-pinch device for the electric window can be designed and manufactured without a sensor.

A heating and/or cooling system which incorporates one or more modular dedicated heat recovery refrigeration units each of which includes at least one compressor, an evaporator and a condenser. The system captures and utilizes condenser circuit heat which would otherwise be wasted. A variable speed circulating water pump circulates water through each evaporator/condenser, which are connected in parallel across the respective supply line and return line. A master controller activates and deactivates individual compressors in accordance with load demand. Shut-off valves close off the water flow through the respective evaporator and/or condenser of any units deactivated and the resulting changes in the pressure differential in the supply and return lines is sensed by sensor which sends a signal to the pump motor speed controller which changes the output of the pump to restore a predetermined pressure differential.

The invention relates to an utilization method of steel slag, which includes the following steps: slagging materials are added into an LF ladle refining furnace for slagging and refining and 20kg to 50kg/t of the slagging materials are added into each ton of molten steel; then in the moulding process, the slags of the ladle furnace and remanent molten steel after moulding are returned to an electric furnace for smelting; the slagging materials are added into the electric furnace and 50kg to 70kg/t of the slagging materials are added into one ton of the molten steel; in the smelting process of the electric furnace, the adding amount of the slagging material lime and the power supply volume of the electric furnace are decreased; as for steel grades which need to be deaerated, after the LF ladle refining furnace is refined and slags are made after the slagging materials are added, the molten steel is sent to a VD vacuum degassing furnace for deaeration; then moulding is carried out; and the slags of the ladle furnace and remanent molten steel after moulding are returned to the electric furnace for smelting. The utilization method of the steel slag is lower in cost and can avoid sulfur enrichment in the ladle refining process.

A method and mechanism for unified power supply and energy-saving operation of variable-frequency drive for escalator group adopts one AC/DC transducer in parallel connection with a braking unit to provide DC power source to multiple DC/AC variable-frequency speed regulators and motors in the group that control all elevators and escalators; therefore forming a channel for energy exchange among various drive units in the group to provide electric energy in the drive units in power-generating operation in the group to other drive units that are in the state of electrically-driven operation. The invention effectively solves the problems in prior art such as energy waste and liability for power grid to contamination. The operating method has a reasonable design and simple structure with safe operation. Compared to operating methods and devices of its kind, the operating method enables the electric energy fed back by the downward escalators to be utilized by the upward escalators, thus reducing the power supply of the electric network, achieving evident energy saving effects, and meanwhile ensuring stable operation of the electric network and reducing the manufacture cost of the device.

Methods and systems for reducing parasitic loading on a power supply output in RF amplifier arrangements used in multiband and/or multitude RF circuits are presented. Such RF circuits can comprise a plurality of RF amplifiers of which only one is activated for a given desired transmission mode and/or band.

An image forming apparatus communicates with a plurality of data processing apparatuses via a plurality of interfaces. The image forming apparatus includes a determination unit configured to determine a communication state with the plurality of interfaces, and a control unit configured to perform control to switch between a first sleep mode in which power supplied to any one of the plurality of interfaces is turned off and a second sleep mode in which power supplied to the plurality of interfaces is repeatedly turned on and off at predetermined time intervals according to the communication state determined by the determination unit.

A power transport apparatus for transporting electric power to an electric vehicle on the road is provided. The apparatus includes a plurality of power supply units provided at a road in a longitudinal direction of the road, one or more of the power supply units simultaneously transporting the electric power to the electric vehicle; and a power line supplying the electric power to the respective power supply units.

A DC-DC converter with improved voltage conversion efficiency is provided. The DC-DC converter includes a first circuit configured to generate a first signal containing data on current flowing through a load, a second circuit configured to amplify the first signal, a third circuit configured to generate a second signal containing data on voltage applied to the load, a fourth circuit configured to hold the second signal, a fifth circuit configured to amplify the second signal held by the fourth circuit, a sixth circuit configured to correct a difference in electrical characteristics between the second circuit and the fifth circuit, a seventh circuit configured to convert a first voltage to a second voltage supplied to the load, and an eighth circuit configured to control a level of the second voltage generated by the seventh circuit in accordance with either the amplified first signal or the amplified second signal.

An electric power storage system for a vehicle includes a temperature sensor configured to detect a temperature of a battery, a battery heater, a charger connectable with an external power supply and configured to deliver external power to the battery and the battery heater, and a controller. In the system, a first electric power is supplied to the battery heater when the state of charge of the battery is larger than a predetermined value and the temperature of the battery is equal to or lower than the predetermined temperature, and a second electric power is supplied to the battery heater when the state of charge of the battery is equal to or smaller than the predetermined value and the temperature of the battery is equal to or lower than the predetermined temperature. The first electric power is smaller than the second electric power.