110results about How to "Small no-load current" patented technology

The invention discloses a gear hub motor lubricated by liquid lubricating oil. The gear hub motor comprises a left end cover, a right end cover, a main shaft an a hub, wherein the left end cover sleeves the main shaft through a first bearing and a first oil seal; an oil filling opening is formed in the left end cover, the right end cover or the hub; the right end cover sleeves the main shaft through a second bearing and a second oil seal; the left end cover is connected with the right end cover through a seal ring and the hub; the left end cover is connected with a solar gear ring through a reducing mechanism; the solar gear ring is fixed on the motor; and the solar gear ring is driven to rotate through the motor, so that the left end cover is driven to rotate through the reducing mechanism to drive the hub to rotate. A two-stage reduction planetary gear reducer mechanism is adopted under the premise of keeping a through shaft structure, so that the reliability of the hub motor structure is ensured; the high-speed performance of a disc-type coreless DC motor can be fully developed; the reducing mechanism is lubricated by the liquid lubricating oil; and the transmission efficiency of the motor is high.

The invention relates to a power transformer based on the modular combination. A double-arc-shaped roll-core element of each phase of a three-phase three-dimensional roll-core comprises two straight line parts and two arc-shaped parts which are in end-to-end alternate connection, an open/closed yoke structure is arranged on each double-arc-shaped roll-core element and used for nesting a winding of the corresponding phase, and the six straight line parts of the three roll-core elements are bonded to one another respectively to form three iron columns of a three-phase three-column three-dimensional structure. An integrated low-voltage winding and a high-voltage foil winding are nested from inside to outside on each iron column, and each high-voltage foil winding consists of a group of high-voltage foil winding modules which are in series connection. The power transformer adopts the three-dimensional roll-core structure which has the novel double-arc shape and is formed by staggered open/closed yoke structures, and has the advantages of high overall stability, low noise, high operating safety, economic benefit and high reliability. Besides, the whole machine is diversified by the winding modules of fewer types, and the winding modules can be provided by different factories, are easy for on-site defect inspection and convenient for dismounting, replacing and recycling, and can meet the requirements for environmental protection and circular economy to the greatest extent.

The invention discloses an outdoor dry-type transformer which comprises a high-voltage coil, a low-voltage coil, an iron core, gap walls and an outer wall. Resin is cast to the space between the high-voltage coil and low-voltage coil and the space between a coil and the iron core to form the gap walls, the gap space is filled with the gap walls, resin is cast to form the outer wall wrapping the high-voltage coil, the low-voltage coil and the iron core, the three coils are connected into a whole by the outer wall, and the iron core is a closed three-dimensional wound core. Insulation between the high-voltage coil and the low-voltage coil and insulation between the low-voltage coil and the iron core are all solid insulation of the resin. As the dielectric constant of the resin is far larger than that of air, insulation distance can be greatly shortened, namely, the distance between the high-voltage coil and the low-voltage coil can be shortened, and the overall dimensions of the transformer coils are decreased. The high-voltage coil, the low-voltage coil and the iron core are cast together, deformation of the coils can be prevented, the short circuit resistance of the transformer is enhanced, the influence of external wind, sun and rain can be resisted, severe environments can be resisted, and the outdoor dry-type transformer can be used as an outdoor transformer.

Disclosed is a data driver including a zero compensation resistor connected in series with a phase compensation capacitor between an output node of an input differential amplification stage and an output node of a succeeding amplification stage, and a control circuit that controls to switch a resistance value of the zero compensation resistor. The control circuit switches the resistance value of the zero compensation resistor to a first resistance value or a second resistance value larger than the first resistance value in response to turning off or on of an output switch that controls connection between the output terminal of an amplifying circuit and a data line.

The invention relates to a single-phase open core transformer, which comprises an oil tank. The oil tank is provided with a tank cover; the tank cover is provided with a high-pressure sleeve; a lifting lug is arranged at a joint of the oil tank and the tank cover; the side wall of the oil tank is provided with a low-pressure sleeve; the oil tank is filled with transformer oil; a core coil structure is also arranged in the oil tank and comprises a coil; the coil is sleeved on a core formed by superposing silicon-steel sheets; and each silicon-steel sheet is provided with fractures which are mutually staggered and positioned on the same side of each silicon-steel sheet. The advantages of light weight, small volume, low loss, low noise, small no-load current and high mechanical and electrical properties of the core are kept; the coil can be independently wound by the common winding machine, so that cost is reduced; the coil can be directly arranged on the core after the core is opened at an opening, so that production efficiency is high, mass production is facilitated, and the core transformer is convenient to disassemble and repair; and the iron space factor of the core transformer is high, which contributes to stabilizing performance.

The invention relates to a method of the amorphous alloy core thin epoxy resin coating, characterized by using the brush coating. The method includes removing the surface dust of the amorphous alloy core through a brush; sticking the adhesive tape with the width 1 cm beside the coating along the line A-A on the amorphous alloy core 1, for preventing the epoxy resin extravasating; brushing the epoxy resin evenly on the core surface above the line A-A on the amorphous alloy core 1, wherein the thickness of the epoxy resin is lower than 1mm; putting the amorphous alloy core with the coating into the oven for roasting at the roasting temperature 100-150 DEG C for 10 minutes to 30 minutes. The invention has the advantages of lower no-load loss, smaller no-load current; the solidifying time of the epoxy resin is reduced for 60%, the whole height of the core is reduced for 2-3 minutes, thereby reducing the size of the transformer for saving.

The invention discloses a dry type transformer for photovoltaic power generation. The dry type transformer for photovoltaic power generation comprises a low-voltage winding and a high-voltage winding which are arranged concentrically; the low-voltage winding is in a double-disrupt arrangement structure; an iron core which is arranged inside the dry type transformer for photovoltaic power generation is an amorphous alloy iron core. The amorphous alloy strip thickness is small, so that the amorphous alloy strip eddy current loss is small; the transformer iron core which is manufactured through amorphous alloy materials instead of silicon steel sheets; the specific loss of the amorphous alloy materials is only 20 to 30 % of the silicon steel sheet iron core; accordingly the iron core of the double-disrupt transformer for the photovoltaic power generation is manufactured through the amorphous alloy strips which are good in magnetic conductive performance, the double-disrupt transformer for the photovoltaic power generation obtains low no-load current, the no-load loss is reduced by 70 to 80 % compared with a common transformer with a silicon steel sheet iron core, the power transmission efficiency is greatly improved, the electric energy loss is reduced, and the integral efficiency and benefits of a photovoltaic power generation system are improved.

The invention relates to the technical field of machine control, in particular to a push rod controller. The push rod controller comprises a single chip microcomputer, a power module, a locking monitoring module, a relay module and at least one brushless motor driving module. The power module, the locking monitoring module, the relay module and the brushless motor driving modules are all electrically connected with the single chip microcomputer. The relay module is used for being electrically connected with a locking motor. When a push rod is started, the locking monitoring module can monitor the state of the locking motor and further transmit the locking motor state information to the single chip microcomputer for treatment. If the locking motor is in a locked state, the single chip microcomputer can control the relay module so as to drive the locking motor to be unlocked. When the single chip microcomputer receives unlocking state signals of the locking motor, the brushless motor driving modules can be controlled by the single chip microcomputer to drive a brushless motor. By adoption of the push rod controller, the push rod with the brushless motor can be well controlled, and the problem of electric sparks caused by contact friction between an electric brush of a brush motor and a commutator is effectively solved.

The invention relates to a resin-poured reel iron core transformer which is composed of an iron core, a high-voltage line package, a low-voltage line package, an upper end part clamp and a lower end part clamp, a high-voltage outgoing line insulator and a low-voltage outgoing line insulator. The iron core is a solid triangle or plane reel iron core, but no opening for installing the high-voltage line package and the low-voltage line package is arranged on the reel iron core. The high-voltage line package and the low-voltage line package on the same iron core column are solidified into one body by epoxy resin cure, or the high-voltage line package and the low-voltage line package on the same iron core column and the iron core are solidified into one body by epoxy resin cure, or the high-voltage line package and the low-voltage line package on each iron core column are solidified into one body by epoxy resin cure, or the high-voltage line package and the low-voltage line package on each iron core column and the iron core are solidified into one body by epoxy resin cure. The resin-poured reel iron core transformer has the advantages that as the reel iron core has no opening, the noload current and noise of the reel iron core are low; the high-voltage line package and the low-voltage line package are poured into one body by the epoxy resin cure, thereby enhancing the short circuit resisting and anti-shocking capacity of the transformer. As the high-voltage line package and the low-voltage line package are poured into one body, the processing difficulty and production cost are reduced.

An active part of a transformer belongs to the technical field of transformer. On the basis of the active part of the transformer in the background art, the active part of the invention has following three improvements: 1) a five-core column iron core is used and the iron core is arranged horizontally; 2) the five-core column iron core is spliced by 4m-numbered O-shaped iron frames which are formed by furling the amorphous alloy strips and are arranged side by side, wherein m is 1, 2, 3 or 4; and 3) each winding contains n-numbered low-voltage coils and n-numbered high-voltage coils, n is 1, 2, 3 or 4; and the low-voltage coils and the high-voltage coils of each winding are successively sleeved on the corresponding core columns in an alternative arrangement manner, n-numbered low-voltage coils are connected in series to form a low-voltage winding, and n-numbered high-voltage coils are connected in series to form a high-voltage winding. The active part of the transformer has the advantages that the electromagnetic properties of the iron core are stable, and the transformer with the active part has low no-load current, less no-load loss, low noise and high operating efficiency during operation.

The invention relates to a loss online detecting system of a three-winding transformer and a loss calculating method. The loss online detecting system is characterized by comprising a current collector and further comprising a voltage collector and a radio frequency communication control unit, wherein the current collector is connected to a three phase at a high-voltage side of the transformer for collecting a current signal; the voltage collector is connected to the three phase CVT at the high-voltage side of the transformer for acquiring a voltage signal; the radio frequency communication control unit is connected to the current collector and the voltage collector in a wired or wireless manner; the radio frequency communication unit is further connected to a computer in a wired manner; and the computer is connected to the voltage collector in the wired or wireless manner. The invention discloses a site transformer no-load loss measuring system which can be used for measuring the no-load current and the no-load loss of the transformer on sites such as a transformer substation and providing comparison basis for the maintenance of the transformer.

The invention discloses a wall-mounted air conditioner and a cabinet air conditioner which can make images on a display panel not limited by the installation positions of light-emitting diode (LED) lamps any more, save space and reduce the using number of the LED lamps. The wall-mounted air conditioner and the cabinet air conditioner comprise display units, air-conditioning units and shells, wherein the display units comprise display panels and LED projection devices; the air-conditioning units are combined with the display units and comprise heat exchangers and fans to refrigerate, heat or purify air; and the display units and the air-conditioning units are arranged in the shells, and the shells comprise air inlets and air outlets; and the LED projection devices comprise motors, and a plurality of LED lamps are arranged on motor shafts. By utilizing the wall-mounted air conditioner and the cabinet air conditioner with the structure, a large-area animation projection display function can be realized, power consumption is low, heat quality is low, and radiating performance is high.

The invention discloses a multiwinding series connection variable volume induction motor and a control device thereof. The multiwinding series connection variable volume induction motor is provided with a stator winding, wherein the stator winding is formed by compounding three sets of three-phase windings; the three sets of windings are correspondingly connected in series respectively; each phase of winding is provided with three line outlet ends; the three-phase windings are provided with nine line outlet ends in total and respectively correspond to a high-power grade, a medium-power grade and a low-power grade; each set of winding is distributed in a single layer; and three contactors of the control device are respectively connected with the line outlet ends of the three sets of windings so as to realize three-power three-grade switching. The three-phase windings adopt a Y connection method. The three sets of windings are in Y-delta mixed series connection; delta connection is adopted in a high-power volume connection method; a Y-delta mixed series connection method is used for medium-power volume; and a 2Y-delta mixed series connection method is used for low power. Compared with the prior art, the invention can be more favorably suitable for the condition of load change and has the advantages of large starting torque, high running efficiency and power factor, simplicity and convenience for control, high reliability, obvious reduction of no-load current and good energy saving effect.

The invention provides an electric generator unit of an air conditioner for an automobile. The electric generator unit comprises an automobile engine and an electric generator of the air conditioner for the automobile, wherein the automobile engine, which is an internal combustion engine, comprises an engine body and an engine crankshaft; and the electric generator of the air conditioner for the automobile comprises a casing, a stator and a rotor. The electric generator unit is characterized in that the electric generator is distributed on the left upper side of the front end of a main shaft neck of the crankshaft; the crankshaft of the engine drives the rotor of the electric generator of the air conditioner to run while rotating; and a controller of the electric generator of the air conditioner is further arranged on the electric generator of the air conditioner; and a compressor of the air conditioner is connected with the controller of the electric generator of the air conditioner. Output voltage of the electric generator can be conveniently controlled by the controller of the electric generator of the air conditioner, so as to ensure that the steady voltage is supplied to the air conditioner system and prolong the service life of the air conditioner; as the electric generator is distributed on the left upper side of the front end of the main shaft neck of the crankshaft, the space on the left upper side of the front end of the main shaft neck of the crankshaft of the automobile engine can be reasonably utilized, and a special electric supply system for the automotive air conditioner, which has a simple structure and is independent, can be provided.

The invention discloses an open rolled iron core dry-type transformer. The dry-type transformer comprises an iron core which is three-phase and three-column. The cross-section shapes of three core columns of the iron core are rectangular open rolled iron cores. Each layer is provided with two fractures, and the fractures are arranged at the three core columns. A low-voltage coil is arranged in the three core columns of the iron core, an insulating layer is tightly fixed outside the low-voltage coil, a high-voltage coil is arranged outside the insulating layer, an upper clamp piece and a lower clamp piece are fixed on the iron core, and the iron core draw a high-voltage terminal and a low-voltage terminal. The dry-type transformer has the advantages of being short in magnetic circuit, high in power factor, small in size, strong in sudden short circuit resistance, good in process condition and the like.

The invention discloses an off-chip capacitor LDO circuit based on the self-adaptive power tube technology.The circuit comprises a control voltage generation unit, a first-stage amplifier, a second-stage amplifier, a frequency compensation unit, a main power tube and an auxiliary power tube.The control voltage generation unit is used for generating control voltage Vctrl; the first input end of the first-stage amplifier is electrically connected with the output end of an LDO, the second input end of the first-stage amplifier is connected with the output end of the control voltage generation unit, the output end of the first-stage amplifier is electrically connected with the input end of the second-stage amplifier, the first end of the frequency compensation unit and the grid electrode of the auxiliary power tube respectively, the grid electrode of the main power tube is electrically connected with the output end of the second-stage amplifier, the main power tube and the source electrode of the auxiliary power tube are connected with a power source, the drain electrodes of the main and auxiliary power tubes and the second end of the frequency compensation unit are electrically connected with the output end of the LDO, and the main power tube is automatically turned on or off according to the load.The off-chip capacitor LDO circuit has the advantages of being low in working voltage, low in no-load current, high in loop gain and wide in output drive range.

The invention relates to a three-phase asynchronous vibration motor which comprises a left end cover, a right end cover, an engine base, an oil nozzle, a stator, a rotor, self-aligning roller bearings, a fixing eccentric block and a movable eccentric block, wherein the left end cover and the right end cover are respectively meshed to the two sides of the engine base through tooth mouths in the left end cover and the right end cover, an oil duct through hole is formed in each of the left end cover and the right end cover, the oil duct through holes go through inner slots of the left end cover and the right end cover straightly from the outside, the stator adopting a cold-rolled silicon steel sheet as a stamped steel is installed at the middle part of the interior of the engine base, the rotor adopting a cold-rolled silicon steel sheet as a stamped steel penetrates through an inner hole of the stator, a rotor shaft is fixed on the inner slots of the left end cover and the right end cover through the two self-aligning roller bearings, the rotor shaft penetrates through the inner slots of the end covers, and the fixing eccentric block and the movable eccentric block are respectively assembled at the left end and the right end of the rotor shaft. The three-phase asynchronous vibration motor has the advantages of high production efficiency, cheap price, low energy consumption, low rate of temperature increase, excellent magnetism of the molding motor, and stable and adjustable exciting force.

The invention provides an electric generator unit of an air conditioner for an automobile. The electric generator unit comprises an automobile engine and an electric generator of the air conditioner for the automobile, wherein the automobile engine, which is an internal combustion engine, comprises an engine body and an engine crankshaft; and the electric generator of the air conditioner for the automobile comprises a casing, a stator and a rotor. The electric generator unit is characterized in that the electric generator is distributed on the left upper side of the front end of a main shaft neck of the crankshaft; and the crankshaft of the engine drives the rotor of the electric generator of the air conditioner to run while rotating. As the electric generator is distributed on the left upper side of the front end of the main shaft neck of the crankshaft, the space of the left upper side of the front end of the main shaft neck of the crankshaft of the automobile engine can be reasonably utilized, and an special electric supply system for the automotive air conditioner, which has a simple structure, is independent and is specially used for providing electric energy sources for an automobile-mounted air conditioner system, can be provided, so that the automobile-mounted air conditioner system can be distributed independently and conveniently; and the electric generator unit is suitable for being used on various automobiles with gas engines, particularly for being used on various cars and buses with gas engines.

The invention relates to an internal bias hub motor for an electric vehicle. End closures are fixed at the two ends of a housing, the left end closure and the right end closure are sleeve jointed with a front crankshaft and a back crankshaft by a support, the front crankshaft is fixedly connected with the back crankshaft, a stator is fixed in space, the stator is wound with a short-distance threephase winding coil, a circular hole of the stator is sleeve jointed with a rotor, the outer side of the rotor is provided with magnetic pole, the middle part of the rotor is provided with a circular hole which is used for fixing a monodirectional bearing, a middle shaft hole of the monodirectional bearing is sleeve jointed with a rotor shaft which is sleeve jointed on the front crankshaft and the back crankshaft by the support, the right end of the rotor shaft is sleeve jointed with a speed-testing magnetic coil, the left end of the rotor shaft is provided with an external gear, the external gear is externally meshed with an output gear which is sleeve jointed on the front crankshaft by the support, and the left end of the output gear is connected with the front end closure. When in use, the front stator is fixed, the rotor runs at high speed, and power is output by gearing mesh in a deceleration way. When the motor is out of work, the rotor shaft is deviated from the stator so as to prevent the motor from producing magnetic resistance to the external force for remaining the continues rotation. The device has the advantages of low consumption, low noise, free-disassembling maintenance, is effectient and durable, and the like.