Abstract

Provided in the present invention is a micro photovoltaic grid-connected inverter system architecture realizing multi-path maximum power point tracking (MPPT) control. The system architecture consists of first to mth primary sides, an isolation communication module and a secondary side, wherein each primary side comprises a primary-side main control chip and first to nth DC/DC converters; the secondary side comprises a secondary-side main control chip, a PLL phase-locked module, a DC/AC converter and an output filter; the primary-side main control chip realizes independent MPPT on multiple paths of photovoltaic assemblies, and controls, by means of PWM, the DC/DC converters to generate a boosted direct current and feed same to the secondary side; the secondary-side main control chip acquires voltage, frequency and phase information of an external power grid, and after receiving the boosted direct current, which is fed by each primary side, controls the DC/AC converter to invert same into alternating currents of the same frequency and feed the alternating currents by means of the output filter to the external power grid; and the isolation communication module realizes complete electrical isolation between the primary sides and the secondary side. By implementing the present invention, the technical defects of the prior art are solved, the problem of there being layout bottlenecks is avoided, and when a single path has an MPPT control failure, MPPT of other paths is not affected.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

Abstract

Provided in the present invention is a photovoltaic parallel optimizer, which consists of a plurality of switch devices and a plurality of controllers. The lead-in end of each switch device is connected to a corresponding photovoltaic panel, the lead-out end thereof is connected to a same parallel application device, and the signal control end thereof is connected to the signal output end of a corresponding controller and used for turning on or turning off the connected photovoltaic panel to supply power to the parallel application device when receiving high-level and low-level signals issued by the connected controller. The two voltage acquisition ends of each controller are respectively connected to the lead-in line and the lead-out line of the connected switch device by means of voltage sensors, so as to test the conditions of voltages on the lead-in and lead-out ends of the connected switch device in real time and compare same. If the voltage of the lead-in end is greater than the voltage of the lead-out end, a high-level signal is generated and issued; and on the contrary, a low-level signal is generated and issued. Implementing the present invention can prevent photovoltaic panels and related devices thereof from being damaged during parallel application, thereby improving the system safety, reducing system losses and increasing the system MPPT efficiency; and in addition, the present invention can control the access of any photovoltaic panel during parallel application.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

The present invention belongs to the technical field of rotary switches, and particularly relates to a rotary switch moving contact assembly for physically interrupting an electric arc. The assembly comprises a moving contact rotary frame, and a moving contact provided on the moving contact rotary frame and in linkage fit with the moving contact rotary frame. A physical interruption structure used for interrupting an electric arc is provided on the moving contact rotary frame, the physical interruption structure comprising at least one group of insulation clamp heads. One group of insulation clamp heads consists of two oppositely-arranged insulation clamp heads which are at least partially insulated, and the two oppositely-arranged insulation clamp heads have a first state in which the two insulation clamp heads are separated to form a gap allowing a static contact to rotate therethrough, and a second state in which the two insulation clamp heads are contacted for interrupting an electric arc. The present invention is innovative in that a mode of physically interrupting an electric arc between the moving contact and the static contact by means of the insulation clamp heads is provided for a rotary switch; in comparison with an existing arc extinguishing mode, the arc extinguishing effect is remarkably improved.

IPC Classes  ?

• H01H 19/10 - Movable partsContacts mounted thereon

Abstract

A dual energy storage operating mechanism of an isolating switch is provided. A first energy storage mechanism and a second energy storage mechanism are provided between an input wheel and a housing and between the input wheel and an output wheel or a first output shaft, respectively. The output wheel is provided with a limiting mechanism. The limiting mechanism forms a locking effect on the output wheel when the first energy storage mechanism stores energy, thereby enabling the second energy storage mechanism to store energy at the same time. When the first energy storage mechanism starts to release energy, the locking effect of the limiting mechanism is released, so that the output wheel and the first output shaft can rotate, and the first energy storage mechanism and the second energy storage mechanism release energy at the same time, forming a dual energy storage boosting effect.

IPC Classes  ?

• H01H 31/02 - Air-break switches for high tension without arc-extinguishing or arc-preventing means Details
• H01H 19/24 - Driving mechanisms allowing angular displacement of the operating part to be effective in either direction acting with snap action
• H01H 5/16 - Energy stored by deformation of elastic members by twisting of torsion members with auxiliary means for temporarily holding parts until torsion member is sufficiently strained
• H01H 5/10 - Energy stored by deformation of elastic members by compression or extension of coil springs one end of spring being fixedly connected to the stationary or movable part of the switch, and the other end reacting with a movable or stationary rigid member respectively through pins, cams, toothed, or other shaped surfaces
• H01H 3/30 - Power arrangements internal to the switch for operating the driving mechanism using spring motor

Abstract

The present invention belongs to the technical field of rotary switches, and in particular, to a rotary switch capable of being quickly cut off. According to the present invention, an energy storage mechanism is additionally provided in the rotary switch, an operation rotating shaft in the closed state can be driven by the energy storage mechanism to quickly rotate to the cut-off position, an electromagnetic coil fixing member is driven to be cut off, the driving action is reliable and rapid, and an electromagnetic driving mechanism is reset and more reliable by rotating the operation rotating shaft.

IPC Classes  ?

• H01H 19/10 - Movable partsContacts mounted thereon

Goods & Services

Inverters; Chargers for electric batteries; Computer monitors; Corrective glasses; Electric circuit switches; Network servers; Relays, electric; Signal bells; Switches, electric; Teaching apparatus in the nature of hairdressing training heads

Goods & Services

Inverters; Chargers for electric batteries; Computer monitors; Corrective glasses; Electric circuit switches; Network servers; Relays, electric; Signal bells; Switches, electric; Teaching apparatus in the nature of hairdressing training heads

Goods & Services

Battery charging devices for motor vehicles; Chargers; Chargers for electric batteries; Portable chargers; Solar batteries; Solar battery chargers; Automatic transfer switches; Cell switches [electricity]; Circuit breakers; DC/AC inverters; Electric breakers [switches]; Fault current breakers; Fault voltage breakers; Outdoor power relays; Voltage surge protectors; Photovoltaic apparatus for converting solar radiation to electrical energy; Photovoltaic installations for generating electricity [photovoltaic power plants]; Photovoltaic inverters; Charging stations for electric vehicles.

Goods & Services

Battery charging devices for motor vehicles; Chargers; Chargers for electric batteries; Portable chargers; Solar batteries; Solar battery chargers; Automatic transfer switches; Cell switches [electricity]; Circuit breakers; DC/AC inverters; Electric breakers [switches]; Fault current breakers; Fault voltage breakers; Outdoor power relays; Voltage surge protectors; Photovoltaic apparatus for converting solar radiation to electrical energy; Photovoltaic installations for generating electricity [photovoltaic power plants]; Photovoltaic inverters; Charging stations for electric vehicles.

Abstract

The present invention relates to a multi-fuse-element fuse holder with multi-path input and confluence output, the fuse holder comprising a fuse base, a fuse carrier, fuse elements and a wiring terminal assembly. At least two fuse elements are provided; the wiring terminal assembly comprises input terminal units matching the fuse elements in number and an output terminal unit used for connecting output ends of all the fuse elements, and the input terminal unit comprises an input terminal and an input electricity-conducting member used for connecting the input terminal and an input end of the fuse element, so that one end of the plurality of fuse elements is separately input, and the other ends of the fuse elements are mutually connected in parallel for confluence output; and the fuse base is internally provided with an embedded wiring groove used for matching and embedding the input electricity-conducting member, and an interval groove used for increasing a creepage distance of the input electricity-conducting member in adjacent embedded wiring grooves is arranged between adjacent positions of the adjacent embedded wiring grooves. The present invention has the advantages that the structure is compact, multiple paths of input lines can be connected to the same fuse holder simultaneously, the cost is low, and the creepage problem among multiple paths of fuse links is solved.

IPC Classes  ?

• H01H 85/20 - Bases for supporting the fuseSeparate parts thereof
• H01H 85/12 - Two or more separate fusible members in parallel

Abstract

The present invention relates to a dual-energy storage operation mechanism for an isolating switch. In the present invention, a first energy storage mechanism and a second energy storage mechanism are respectively provided between an input wheel and a housing and between the input wheel and an output wheel or a first output shaft; the output wheel is provided with a limiting mechanism; the limiting mechanism has a locking effect on the output wheel when the first energy storage mechanism stores energy, and thus enables the second energy storage mechanism to store energy; the locking effect of the limiting mechanism is relieved when the first energy storage mechanism starts to release energy, such that the output wheel and the first output shaft can rotate, and the first energy storage mechanism and the second energy storage mechanism release energy at the same time, forming a dual-energy storage boosting effect; and the first output shaft rotates at a larger angle, improving the electrical properties and mechanical properties of the isolating switch.

IPC Classes  ?

• H01H 31/08 - Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
• H01H 3/30 - Power arrangements internal to the switch for operating the driving mechanism using spring motor

Abstract

The present utility model belongs to the technical field of switches, and in particular relates to a moving contact assembly for a rotary switch. The moving contact assembly comprises a moving-contact rotating frame. The moving-contact rotating frame comprises a drive portion, a support portion, and an arc extinguishing portion. The drive portion is disposed at the center of the support portion. The arc extinguishing portion is disposed at the periphery of the support portion, and is provided with an arc extinguishing recess into which a fixed contact extends. The support portion is provided with at least one moving contact sleeved outside the drive portion, and part of the moving contact is located in the arc extinguishing recess. The arc extinguishing portion is fixedly provided with a magnet above and/or below the arc extinguishing recess. The magnet is disposed at the moving-contact rotating frame, and is positioned relative to the moving contact so as to rotate as the moving contact rotates, thereby producing improved arc-extinguishing effects compared to when the magnet is disposed at a housing unit.

IPC Classes  ?

• H01H 19/10 - Movable partsContacts mounted thereon
• H01H 19/02 - Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand Details
• H01H 9/30 - Means for extinguishing or preventing arc between current-carrying parts

Abstract

The present invention relates to the field of rotary switches, and specifically relates to an operating mechanism used in a rotary switch, said mechanism comprising a mounting base. An operating rod assembly used for manual rotation and a rotary disk assembly are provided inside the mounting base. An energy storage component is provided between the operating rod assembly and the rotary disk assembly. The rotary disk assembly, by means of forward rotation or reverse rotation, closes or opens a switch. Rotation of the operating rod assembly causes the energy storage component to drive the rotary disk assembly to rotate. A limiting piece is hingedly connected inside the mounting base, the limiting piece comprising a pushing part, and a blocking part. When the rotary disk assembly is positioned at a closed position, the blocking part is in the rotational path of the operating rod assembly or the energy storage component, thus having a blocking and limiting effect on the rotation of the operating rod assembly. In the case that a contact is melted and stuck, the rotary disk assembly is unable to rotate away from the closed position, and presses against the pushing part, preventing, by means of the blocking part, the operating rod assembly from rotating to the open position. An operator would then quickly realize that the contact had melted and make further safety operations, reducing hidden safety risks.

IPC Classes  ?

• H01H 19/03 - Means for limiting the angle of rotation of the operating part
• H01H 19/14 - Operating parts, e.g. turn knob

Goods & Services

Chargers for electric batteries; Circuit breakers and circuit closers; Computer monitors; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Inverters; Optical lenses; Relays, electric; Signal bells; Switches, electric; Downloadable communications software for connecting computer network users and global computer networks