30results about How to "Suppress overload" patented technology

The invention discloses a multi-end coordination control and protection system for flexible direct-current power grids. The multi-end coordination control and protection system has the advantages thata multi-end coordination control device, pole control devices, pole protection devices, bus protection devices, line protection devices, a direct-current station control device, an alternating-current station control device, a grounding resistance monitoring device, a conversion transformation protection device, an alternating-current energy dissipation device and a safety and stability control device in the multi-end coordination control and protection system are connected with control bus, and accordingly data can be shared among the multi-end coordination control device, the pole control devices, the pole protection devices, the bus protection devices, the line protection devices, the direct-current station control device, the alternating-current station control device, the grounding resistance monitoring device, the conversion transformation protection device, the alternating-current energy dissipation device and the safety and stability control device; voltages and power of the integral grids can be controlled by the multi-end coordination control and protection system, equipment such as bus, direct-current lines and conversion transformation equipment can be protected in real time, short-time absorbed transient energy can be inputted by the alternating-current energy dissipation device when new energy cannot be outwardly delivered due to island delivery-end single-pole locking or receiving-end converter station faults in the flexible direct-current power grids, then generator tripping can be carried out on the new energy by means of safety control, and accordingly the problems of overload, power surplus and the like of power grids due to the fact that existing new energy cannot be outwardly delivered when the existing flexible direct-current power grids are in island operation modes can be effectively solved by the aid of the multi-end coordination control and protection system.

The present invention relates to an automated shift control device and straddle-type vehicle equipped with the same. The automated shift control device comprises: a gear selecting mechanism configured to select a pair of gears of a transmission to transmit driving power from an input to an output of the transmission; a shift actuator configured to generate power to drive the gear selecting mechanism; a shift power transmission mechanism configured to transmit the power from the shift actuator to the gear selecting mechanism; and a torque limiter having a first rotating member to which the power from the shift actuator is transmittable and a second rotating member to which the power from the first rotating member is transmittable, the first rotating member co-rotating with the second rotating member to transmit the power from the shift actuator to the second rotating member as torque, when the torque to be transmitted to the second rotating member equals to or less than a predetermined limit torque, the first rotating member rotating relative to the second rotating member to limit the transmitted torque to the predetermined limit torque or less when the torque to be transmitted to the second rotating member exceeds the predetermined limit torque.

An automated shift control device suppresses overload of the shift motor and reduces the time from beginning to completion of a gear shifting operation. A transmission has a plurality of pairs of speed change gears and a gear selecting mechanism. A shift motor drives the gear selecting mechanism. A shift power transmission mechanism transmits power from the shift motor to the gear selecting mechanism. A torque limiter has a third reduction gear and a third shaft forming a part of the shift power transmission mechanism. The torque limiter transmits power from the shift motor as torque. When the transmitted torque is not more than a predetermined limit torque, the third reduction gear co-rotates with the third shaft. When the transmitted torque exceeds the predetermined limit torque, the third reduction gear rotates relative to the third shaft to limit the transmitted torque to the predetermined limit torque or less.

An automatic transmission control apparatus that shortens the time from starting to finishing a shift motion and suppresses overload applied to a shift actuator. A transmission apparatus has a plurality of shift gear pairs with different transmission gear ratios, and a gear selecting mechanism that selects a shift gear pair transmitting power. A shift motor drives the gear selecting mechanism. A shift power transmission mechanism transmits power of the motor to the gear selecting mechanism. A mechanical fuse within the shift power transmission mechanism generates an irreversible state change such that the transmission power becomes equal to or less than a predetermined value if the transmission power exceeds the predetermined value.

According to this radiography device, by taking images in rapid succession while appropriately obtaining the timing for which an X-ray tube in a rest state should be activated, rapid successive imaging and protection of a radioactive source can both be achieved. That is, in the configuration of the present invention, a time difference is calculated, obtained by subtracting a temporal width of an activation period from a temporal width of an undetectable period, and the time after the time difference has elapsed from the time at which an X-ray is irradiated is determined as the timing for activating the X-ray tube. The temporal width of an undetectable period is the temporal width between the time at which an FPD detects an X-ray once and the time at which the following X-ray can be detected, and the temporal width of an activation period is the temporal width between the start of activation of the X-ray tube to the completion of activation. Thus, while simultaneously activating the X-ray tube and preparing the detector, images can be taken in rapid succession without excessive burden on the X-ray tube and the life of the X-ray tube can be extended.

The present invention relates to a vacuum cleaner with vibration cleaning device. Said vacuum cleaner includes bag filter, said filter is formed from filter bag and skeleton for opening said filter bag. It is characterized by that the bag mouth fastener cover of said filter bag is parallelly-connected with inlet of fan, and said skeleton is placed in the filter bag, and is supported or drawn by an elastic element so as to can make the filter bag be retained in open state, and a vibrator is fixed on the skeleton.

The invention provides a converter overload protection method by a flexible DC transmission bipolar system. For an island passive system connected to the new energy access, alternating current sides of a bipolar converter are respectively connected to respective alternating current buses, bus connection switch devices are used for connection between the alternating current buses, the converter isin bipolar operation, it is determined what the bipolar power is larger than the maximum power of one pole of the converter, the bus connection switches are controlled to be an opening position, whenthe bipolar power is smaller than the maximum power of one pole of the converter, the bus connection switches are controlled to be a closing position so as to avoid the problem that faults of one poleof the bipolar system cause overload of the other pole of the converter to generate off-stream. The method for inhibiting the overload of the converter is simple and practical, and high in reliability, can pass the send-out power of the other pole to the maximum extent when the faults of the pole converter are generated, can avoid the overload off-stream of the non-fault pole and can optimally ensure the effective send-out of the new energy.

A hybrid type working machine having a supercharger, in which overload to the engine is suppressed. The hybrid type working machine (1) comprises an engine (11); a supercharger (42); a motor generator (12) that generates electricity with the driving force of the engine (11), as well as assist the driving force of the engine (11) with the driving force of itself; an inverter circuit (18A) connected to the motor generator (12); and a nonvolatile memory (31) that stores the correlation between the rotating speed of the engine (11) and the boosting pressure of the supercharger (42), and the upper limit value for the output of the engine (11); and is also provided with a controller (30) that drives the inverter circuit (18A). The controller (30) controls the inverter circuit (18A) so as to have the motor generator (12) assist the driving force when the necessary output exceeds the upper limit value for the output, based on the correlation stored in the nonvolatile memory (31).

The invention discloses a multi-end coordination control and protection system for flexible direct-current power grids. The multi-end coordination control and protection system has the advantages thata multi-end coordination control device, pole control devices, pole protection devices, bus protection devices, line protection devices, a direct-current station control device, an alternating-current station control device, a grounding resistance monitoring device, a conversion transformation protection device, an alternating-current energy dissipation device and a safety and stability control device in the multi-end coordination control and protection system are connected with control bus, and accordingly data can be shared among the multi-end coordination control device, the pole control devices, the pole protection devices, the bus protection devices, the line protection devices, the direct-current station control device, the alternating-current station control device, the grounding resistance monitoring device, the conversion transformation protection device, the alternating-current energy dissipation device and the safety and stability control device; voltages and power of the integral grids can be controlled by the multi-end coordination control and protection system, equipment such as bus, direct-current lines and conversion transformation equipment can be protected in real time, short-time absorbed transient energy can be inputted by the alternating-current energy dissipation device when new energy cannot be outwardly delivered due to island delivery-end single-pole locking or receiving-end converter station faults in the flexible direct-current power grids, then generator tripping can be carried out on the new energy by means of safety control, and accordingly the problems of overload, power surplus and the like of power grids due to the fact that existing new energy cannot be outwardly delivered when the existing flexible direct-current power grids are in island operation modes can be effectively solved by the aid of the multi-end coordination control and protection system.

The name of the invention is a building communication system with at least one door station and at least two residence stations, wherein all the stations (1-5) are connected to a bus (8), communication and energy supply can be performed via the bus, wherein a voltage supply unit (6) is connected on the bus (8). At least a power coordinator (7) used for performing management of coordination of energy consumption of stations (1-5), the power coordinator is provided with a current energy consumption value of the stations (1-5) and a maximal permitted energy load carrying capability of a voltage supply unit (6), and the power coordinator is communicated with the stations (1-5), wherein, the stations (1-5) notifies / requests the required energy demand in the power coordinator (7). The power coordinator (7) determines whether the requested energy demand is provided by the voltage supply unit (6) on the basis of the current energy consumption value and the maximal permitted energy load carrying capability of the voltage supply unit.

A work vehicle includes a travel device and a work implement. A control system for the work vehicle includes a controller. The controller controls the work implement according to a predetermined target value. The controller determines whether a slip of the travel device has occurred during control of the work implement. The controller changes the target value according to a result of determination of the slip.

The present invention provides a combine harvester which can be used for realizing high-effective harvesting works, and preventing blocking of a grain rod caused by load applied on a harvesting device and a threshing device. A tail end part of a left side grass-dividing part (14L) of a left side part of the harvesting device (4) and a tail end of a right side grass-dividing part (14R) of a right side part of the harvesting device (4) are respectively and freely moved toward the right and left directions, thus two rows of grain rods are guided to a part between the left side grass-dividing part (14L) and the right side grass-dividing part (14R) when the tail end part of the left side grass-dividing part (14L) and the tail end part of the right side grass-dividing part (14R) are moved toward the mutually close direction and mutual space is shortened, and four rows of grain rods are guided to a part between the left side grass-dividing part (14L) and the right side grass-dividing part (14R) when the tail end part of the left side grass-dividing part (14L) and the tail end part of the right side grass-dividing part (14R) are moved toward the mutually separating direction and mutual space is enlarged.

The purpose of the present invention is to provide a drive device for an observation light switching mechanism, the device enabling the size thereof to be reduced and overloading of a drive motor to be prevented. In order to achieve such purpose this drive device includes the following: a filter unit 42 in which an optical filter 32 for generating light having specific wavelength characteristics is disposed, and in which the optical filter can be disposed in a first position and a second position different from the first position; a protruding part 42x provided to the filter unit; a transmission part 43 which includes a first groove 43d that the protruding part makes contact with, which rotates about a prescribed rotation shaft 41d, and which causes the optical filter to move from the first position to the second position by causing the protruding part to move along the first groove; and a second groove 43e which is provided in the transmission part, and in a state where the optical filter has been moved to the second position, is provided along the protruding part tangent-line direction the center of which is the rotation shaft of the transmission part.

Disclosed is a method for providing a communication service based on a push, which may include: when an application loaded on a client is executed, requesting a communication service based on the push keys to an account server; receiving push keys of multiple target clients from the account server; requesting a push server to transfer the push keys of the client and a service request for a predetermined service to at least some of the multiple target clients; and when communication connection with a target client which responds to the service request is performed based on the push keys, performing the predetermined service.

The invention provides a method for suppressing overload of a converter by a flexible direct current transmission bipolar system. For an island passive system connected to the new energy access, the two poles of the alternating current side of a bipolar converter are respectively connected with separated alternating current buses, the buses at the two poles employ electronic switch devices as female connection switches, the converter is in bipolar operation, the female connection electronic switches communicate, when one pole is locked, when it is monitored that the bipolar power is larger than the maximum power limit of one pole of the converter, the female connection electronic switches are disconnected, and when the bipolar power is smaller than the maximum power limit of the pole, theelectronic switch turn-on state is kept. Besides, aiming at the fault problem from the direct current circuit of the converter to the receiving end of the converter, connected energy consumption resistance devices through the electronic switches are added on the positive and negative direct current buses, and the electronic switch input energy consumption resistance device is turned on when the direct current overvoltage is detected to inhibit the overvoltage of the converter.

A vehicle drive device includes a generator to output AC power, a converter that converts the AC power into DC power, and an inverter that converts the DC power into AC power. An electric motor is driven by the AC power output by the inverter, and an inverter controller (i) calculates a control command value in accordance with an operation command and (ii) controls the inverter based on the calculated value. A value obtained by dividing (i) an amount of the change in the control command value in a case of an increase of the operation command by (ii) a period from when the operation command changes to when the control command value reaches the control command value corresponding to post-change operation command has a negative correlation with the rotational speed of the electric motor at the time when the operation command changes.

A work vehicle includes a travel device and a work implement. A control system for the work vehicle includes a controller. The controller controls the work implement according to a predetermined target value. The controller determines whether a slip of the travel device has occurred during control of the work implement. The controller changes the target value according to a result of determination of the slip.