36results about How to "Extended backup time" patented technology

A projector 100 includes an image projection unit 6 that projects an image using light from a discharge lamp 1, a ballast 2 that controls a supply voltage supplied to the discharge lamp 1, a system controller 3 that controls a command signal outputted to the ballast 2, a volatile memory 31, a nonvolatile memory 32 that stores data stored in the volatile memory 31, and a power supply unit 4 that includes a capacitor 48 used for generating a supply voltage supplied from an external power supply to the ballast 2. The system controller 3 stores the data of the volatile memory 31 in the nonvolatile memory 32 using a voltage generated by accumulated charges of the capacitor 48 when the external power supply is cut off.

In order to be able to control the creation of a user channel connection in a communication system using wireless communication between at least one mobile part and one wired part in such a way that a user channel connection is established more quickly upon a connection request indicated by the mobile part or the wired part for the purpose of transmitting user data and, at the same time, due to market requirements, no synchronization pulses are sent by the wired part in the idle state, an initiating device of the communication system (for example, for an incoming call: base station; for an outgoing call: mobile part) sends, from an asynchronous idle state, synchronization pulses (SB) to all available physical resources. Due to the plurality of the sent, available synchronization pulses (SB), rapid synchronization is ensured because the probability is sufficiently increased thereby that a pulse will fall in the search window of a receiver.

The invention discloses an on-line cleaning method for a ball valve overhauling seal in a range of overhauling and maintenance of power plant equipment. The method comprises the following steps of: selecting an on-line cleaning device, a cleaning agent and cleaning processes, withdrawing the ball valve overhauling seal, flushing with tap water, washing with acid, flushing with tap water after the acid washing, adding an alkali solvent for neutralization, flushing with tap water, performing surface passivation and flushing with tap water; and checking the cleaning effect. Nitric acid is used as a main cleaning agent and has strong capability of dissolving water scales, ferric oxide and rust scales and high reaction rate, and the reacted waste water is easily treated; and by cleaning the water scales of the throwing and withdrawing cavities of the ball valve overhauling seal, the service life of a ball valve sealing ring can be prolonged, the ball valve overhauling period is prolonged, the water leakage of a unit in a halting state is effectively reduced, the running safety and the running stability of the unit are improved, and the economic running capability of the unit is improved.

The invention relates to a UPS second disconnection circuit and a second disconnection method. the circuit comprises a plurality of dial switch I / O-N, the input end is electrically connected with a DSP chip, the output end is connected with a base electrode of an audion QN, an emitting electrode of the audion QN is grounded, a collector electrode is connected with one end of a relay JQN coil, the other end of the coil is connected with a power supply VCC end, a normally-closed contact 3 is connected with loads, and a public end 4 is connected with a UPS output end. The 0 position of the dial switch is set to be unlimited by UPS battery voltages, and the loads are disconnected after the UPS battery voltages are discharged. 1 position is set to be that the UPS output is disconnected with corresponding loads through the relay JQN when the battery voltages are reduced to respective thresholds. By means of the circuit and the method, power supply for secondary loads can be cut off automatically during outage of the mains supply, the circuit can be connected automatically after the mains supply is restored to be normal, and accordingly, the main load back-up time is prolonged; the circuit safety is reliable, the cost is low, and damage to the batteries due to discharging of large currents is prevented.

The invention provides a hierarchical starting mining intrinsic safety power supply which at least comprises a DC / DC (direct-current) power supply unit, a safety grid circuit, a storage battery, a power supply control circuit, a storage battery power supply control circuit, a voltage comparison unit and a control unit. The DC / DC power supply unit is used for receiving direct current and boosting or reducing voltage of the direct current, the voltage comparison unit is used for acquiring the voltage of the storage battery and comparing the voltage with set reference voltage, the DC / DC power supply unit is electrically connected with the safety grid circuit through the power supply control circuit, the storage battery is electrically connected with the safety grid circuit through the storage battery power supply control circuit, an input end of the voltage comparison unit is electrically connected with the storage battery, an output end of the voltage comparison unit is electrically connected with the DC / DC power supply unit, the DC / DC power supply unit supplies power for the control unit, the control unit outputs control signals to the power supply control circuit and the storage battery power supply control circuit and is further electrically connected with a positive electrode of the storage battery. The hierarchical starting mining intrinsic safety power supply can avoid false triggering caused by high current in starting of the intrinsic safety power supply, and stable and persistent operation of the intrinsic safety power supply can be guaranteed, so that the on-load capacity of the intrinsic safety power supply is enhanced.

In order to be able to control the creation of a user channel connection in a communication system using wireless communication between at least one mobile part and one wired part in such a way that a user channel connection is established more quickly upon a connection request indicated by the mobile part or the wired part for the purpose of transmitting user data and, at the same time, due to market requirements, no synchronization pulses are sent by the wired part in the idle state, an initiating device of the communication system (for example, for an incoming call: base station; for an outgoing call: mobile part) sends, from an asynchronous idle state, synchronization pulses (SB) to all available physical resources. Due to the plurality of the sent, available synchronization pulses (SB), rapid synchronization is ensured because the probability is sufficiently increased thereby that a pulse will fall in the search window of a receiver.

The invention provides a power supply method for iron towers based on differentiated power backup equipment, relates to the field of power tower backup, and can meet the power backup needs of original backup batteries and crude oil generators after adding 5G equipment from different operators to base stations. The power supply method of the iron tower includes the following steps: Step 1. After the mains supply is interrupted, N pieces of backup power supply are discharged to supply power to X devices, N≥2, X≥2; Step 2. Turn off M pieces of backup power alternately, start the generator to Among them, Y devices supply power, and the remaining N‑M backup power supplies supply power to the remaining X‑Y devices, Y≥1, M≥1; Step 3: The backup power supply reaches the primary power-off voltage, and enables differentiated backup power supply to X devices Power supply; step 4, when the mains power supply is restored, the mains power is used to supply power to X devices, and the mains power is also charged to N spare power sources. In the present invention, part or all of the M backup power supplies alternately correspond to the number of N-M backup power supplies, and the generator is used to supply power to Y devices, which can extend the backup time.