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110results about How to "Optimize energy use" patented technology

Brushless DC motor control

A method and control system to control a brushless DC motor to a preferred position is provided. The advantages that accrue to a system employing the method and apparatus to control the brushless DC motor to a preferred position include optimizing response time, energy usage, coil heating, and ability to hold to a fix position. The method to control the brushless DC motor to a position comprises monitoring actual position of the brushless DC motor, monitoring energy used by the brushless DC motor, and determining a commanded position of the brushless DC motor. A zero torque commutation method is employed to control the brushless DC motor to the commanded position only when a time-rate change in the commanded position is less than a first threshold, a difference between the commanded position and actual position is less than a second threshold, and, the monitored energy used is less than a third threshold. A peak torque commutation method is employed to control the brushless DC motor to achieve the commanded position when the time-rate change in the commanded position is greater than the first threshold, the difference between the commanded position and actual position is greater than the second threshold, or the monitored energy used is greater than the third threshold.
Owner:DELPHI TECH IP LTD

Energy regulation system for an electrical power supply bus

InactiveUS6744236B2Optimize energy useBattery charging and bus voltage to be regulated finelyBatteries circuit arrangementsPower supply linesEnergy regulationElectrical battery
The present invention relates to an electrical energy regulator system for a power supply bus, the system including:an electrical energy storage unit,a solar generator having a plurality of cells,a system for regulating the bus power supply voltage adapted to impose on each cell one of the following three states:a first state in which the bus is supplied with current,a second state in which the storage unit (BAT) is supplied with current, anda third state in which the cell is shunted,the cells being divided by the bus voltage regulator system into:a first group in which at least one cell supplies power to the bus and one cell is assigned to regulation of the voltage of the bus and is in its first state only when maintaining a nominal bus voltage requires a top-up of current, anda second group in which at least one cell is either in a second state or in a third state, as a function of a required charging current of the storage unit, the number of cells in the second state being a function of the required charging current.The system further includes a system means for regulating the charging of the storage unit which assign at least one cell of the second group to supplying power to the storage unit (BAT) and one cell of the second group to regulating the voltage of the storage unit, the storage unit charging voltage regulator cell being in its second state only when maintaining a nominal charging voltage requires a top-up of current.
Owner:ALCATEL LUCENT SAS
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