2 results about "Negative power" patented technology

The invention relates to an electromagnetic lock driving circuit which is used for sending a locking pulse or an unlocking pulse to an electromagnetic lock. The electromagnetic lock driving circuit comprises a time delay unit, an on-off unit, an energy storage unit and a switching unit, wherein the time delay unit is used for controlling the pulse width of the locking pulse; the on-off unit is used for controlling the on-off of a locking circuit of the electromagnetic lock according to the time delay unit so as to generate the locking pulse; the energy storage unit is used for providing the energy required by the unlocking pulse; the switching unit enables the energy storage unit to charge when receiving a locking bias signal; and the energy storage unit is enabled to output the unlockingpulse when the locking bias signal disappears. The electromagnetic lock driving circuit outputs the unlocking pulse to the electromagnetic lock through using the energy storage unit, thereby being capable of avoiding the simultaneous use of positive and negative power supply modules in the electromagnetic lock driving circuit, and effectively simplifying the electromagnetic lock driving circuit. In addition, the electromagnetic lock driving circuit outputs the unlocking pulse to the electromagnetic by using the energy of the energy storage unit when the locking bias signal disappears or the power supply is interrupted, thereby being capable of avoiding the trouble that the electromagnetic lock of a charging gun cannot be unlocked due to the interruption of the power supply.

The invention relates to a novel solar seawater desalting device which is characterized by comprising a solar panel (1), a bracket (2), a storage battery (3) and a seawater desalter (4), wherein the solar panel (1) is connected with the bracket (2); the positive and negative power supplies of the storage battery (3) are connected with the positive and negative output electrodes of the solar panel (1) through wires; the positive and negative power supplies of the storage battery (3) are connected with the positive and negative poles of the seawater desalter (4). The device provided by the invention is applied to the places in lack of freshwater resources such as steamships, islands and the like, generates electricity with solar energy, and provides power energy to the seawater desalter. The device is simple to mount and is environment-friendly and inexhaustible while the use cost is reduced.