3413results about "Conversion constructional details" patented technology

An electrical system with selectable output voltage is disclosed. An example system includes a first set of energy storage modules, a second set of energy storage modules, a choke connected to the first set of energy storage modules and the second set of energy storage modules, and a switch configured to switch between a first state and a second state. Upon switching the switch to the first state, the first set of energy storage modules are connected in parallel with the second set of energy storage modules to provide a first voltage to at least one output. Upon switching the switch to the second state, the first set of energy storage modules are connected in series with the second set of energy storage modules to provide a second voltage to the at least one output.

A semiconductor device includes semiconductor elements and conductors. The conductors include a first upper conductor connected to an upper electrode of the first semiconductor element through a first upper solder, a first lower conductor connected to a lower electrode of the first semiconductor element through a first lower solder, a second upper conductor connected to an upper electrode of the second semiconductor element through a second upper solder, a second lower conductor connected to a lower electrode of the second semiconductor element through a second lower solder, and a joint conductor connecting the first upper conductor and the second lower conductor through a relay solder. Each solder contains Cu and Sn. Each solder connection target has an Ni layer. A grain size of at least one of the first upper solder, second upper solder, or relay solder is smaller than a grain size of the first and second lower solders.

An electrical system with selectable output voltage is disclosed. An example system includes a first set of energy storage modules, a second set of energy storage modules, a choke connected to the first set of energy storage modules and the second set of energy storage modules, and a switch configured to switch between a first state and a second state. Upon switching the switch to the first state, the first set of energy storage modules are connected in parallel with the second set of energy storage modules to provide a first voltage to at least one output. Upon switching the switch to the second state, the first set of energy storage modules are connected in series with the second set of energy storage modules to provide a second voltage to the at least one output.

A fuse group assembly may include a first bus bar, a second bus bar in a stepped arrangement with the first bus bar, a first support plate arranged on the second bus bar, a second support plate in a stepped arrangement with the first support plate, a first fuse having a first end electrically connected to the first bus bar and a second end supported by the first support plate, and a second fuse having a first end electrically connected to the second bus bar and a second end supported by the second support plate.

The invention provides a low-stress double-sided cooling power module and a manufacturing method thereof, the low-stress double-sided cooling power module comprises a first copper-clad ceramic substrate and a second copper-clad ceramic substrate which are oppositely arranged, the first copper-clad ceramic substrate is provided with at least two power chips, and two sides of each power chip are provided with C-shaped auxiliary support column connecting layers; and the lower surface of the second copper-clad ceramic substrate is provided with an inverted metal buffer cushion block which is arranged opposite to each power chip. The inverted metal buffer cushion block comprises a connecting frame with a groove, an auxiliary supporting column connected with the connecting frame is arranged at the position, corresponding to the auxiliary supporting column connecting layer, of the connecting frame, a protruding quadrangular frustum pyramid heat conduction structure is arranged in the groove of the connecting frame, and the bottom of the inverted quadrangular frustum pyramid heat conduction structure is connected with a power chip. The inverted metal cushion block constructs an optimized heat conduction path for the power module, so that heat generated in the working process of the chip can be efficiently conducted to an external heat dissipation environment through the metal cushion block, and the junction temperature of the chip is effectively reduced.

A case body has a first opening that is open along a first direction and through which an inverter device is insertable, a surrounding wall portion disposed along the first direction so as to surround the first opening, and a second opening that is formed in the surrounding wall portion and through which a power cable is insertable. A cover member is fixed to the surrounding wall portion by a plurality of fastening members disposed away from each other along an opening edge of the first opening so as to cover the first opening. A second opening width in a direction orthogonal to the first direction is smaller than an opening width of the second opening in the first direction, and a pair of the fastening members is disposed on both sides across the second opening.

The invention discloses an integration and optimization method of a multilayer circuit board in a photovoltaic inverter, and the method comprises at least seven layers of functional stacked structures which are an electromagnetic shielding layer, a power device layer, a first insulating dielectric layer, a control circuit layer, a second insulating dielectric layer, a heat dissipation substrate layer and a mechanical strengthening layer from top to bottom in sequence. Wherein the power device layer adopts a three-dimensional embedded packaging technology to integrate an IGBT module and a SiC MOSFET module, and a gate drive circuit of the power device layer is embedded into a first insulating dielectric layer in a coplanar waveguide structure; the heat dissipation substrate layer is provided with a micro-channel array with gradient apertures, and the inner wall of each micro-channel is subjected to anodic oxidation treatment to form an Al2O3 ceramic layer with the thickness of 20-50 microns.

Provided are an integrated energy storage unit, an energy storage-power expansion pack, and an energy storage device. The integrated energy storage unit includes an integrated unit case and a first firefighting module. The integrated unit case includes a first battery box housing and a heat sink housing that are detachably connected to each other. A first battery module is fixed in the first battery box housing. An inverter circuit board is fixed in the heat sink housing. The inverter circuit board is configured for a conversion between an alternating current and a direct current and heat dissipation to an exterior environment through the heat sink housing. The first firefighting module is disposed in the integrated unit case. The first firefighting module includes a trigger mechanism, a fire-extinguishing agent storage compartment, and a release mechanism. The trigger mechanism is disposed in a firefighting detection region in the integrated unit case and configured to generate a trigger signal when a firefighting trigger condition in the firefighting detection region is met. The fire-extinguishing agent storage compartment is configured to store a fire extinguishing agent. The release mechanism is configured to, in response to the trigger signal from the trigger mechanism, release the fire extinguishing agent into a chamber where the first battery module is located.

An electrical propulsion system comprises an inverter, an electrical motor assembly, an assembly, and a rotor position sensor. The inverter comprises a printed circuit board assembly (PCBA). The electrical motor assembly comprises a stator and a rotor. The assembly is configured to rotate a propeller and comprises a moving component and a stationary component. The rotor position sensor comprises at least one sensor coupled to the PCBA, and a magnet located on the moving component. The at least one sensor is configured to detect a magnetic field of the magnet through the stationary component.

An electrical line selection system comprising a circuit module configured to connect energy sources with multiple line outputs. The circuit module has a number of inputs configured to connect to energy sources, including rechargeable battery systems, and a number of outputs configured to connect with other electrical systems such as other battery systems, loads, charging sources, and various AC or DC power supplies. A switching circuit is contained by the circuit module and a controller manages the switching circuit based on desired connections and strategies for managing power supplies and current sinks.

A controller includes a circuit board, and a module assembly arranged at the circuit board. The module assembly includes a first power module, a second power module, and a third power module. The circuit board includes a first current circuit connected to the first power module, a second current circuit connected to the second power module, and a third current circuit connected to the third power module. The first current circuit and the second current circuit share one or more circuit components.

The embodiment of the invention relates to the technical field of energy storage, and provides an energy storage converter and an energy storage system thereof. The capacitor assembly and the inductor assembly are arranged on the two sides of the plate body assembly respectively; the two ends of the connecting assembly are electrically connected with the capacitor assembly and the inductor assembly respectively; and the heat dissipation assembly is provided with a heat dissipation air channel, and at least part of the capacitor assembly is located in the heat dissipation air channel, so that the problem of low working efficiency of an inductor and a capacitor in the energy storage converter in the prior art is at least favorably solved.

An electrical propulsion system for a vertical take-off and landing (VTOL) aircraft comprises an electrical motor assembly and an inverter assembly. The inverter assembly comprises a housing, a capacitor assembly, at least one printed circuit board assembly (PCBA), and a plurality of positioning pins. The capacitor assembly comprises a center hole, at least one capacitor, a capacitor housing having at least one busbar, and a plurality of through holes in the capacitor housing. The capacitor assembly and the at least one PCBA are positioned inside the housing. The plurality of positioning pins pass through the through the plurality of through holes of the capacitor housing and the at least one PCBA and are connected to the housing.

A system includes: an inverter, wherein the inverter includes: a power module including: a flex layer including a gate trace, a first substrate, a second substrate including a source plane and a gate plane separated from the source plane by a full trench, the source plane including a step trench, and the gate plane including an electrical connection through the gate trace of the flex layer to a gate input connection of the power module, a semiconductor die disposed between the first substrate and the second substrate, the step trench formed in a portion of the source plane corresponding to at an edge of the semiconductor die, and the semiconductor die including a gate connected to the gate plane, and a sinter element disposed between the semiconductor die and the second substrate to connect the semiconductor die to the second substrate; a battery; and a motor.

The invention provides a power assembly and a motor controller, the power assembly comprises a power module, a radiator and an insulating part, the power module comprises a leading-out terminal, the insulating part is arranged on the surface of one side, facing the power module, of the radiator, and in the thickness direction of the power assembly, the projection of the insulating part covers the projection of the leading-out terminal on the radiator; the projection of the leading-out terminal on the radiator is covered by the projection of the insulating part in the thickness direction of the power assembly, the safety electrical insulation between the leading-out terminal and the radiator is ensured through the insulating part, and the electrical insulation performance between the power module and the radiator is improved.

The invention discloses a damping control method, a damping control system, a damping control medium and damping control equipment for a grid-forming type flexible direct current converter, and belongs to the field of stability control of a high-voltage direct current transmission system.The damping control method comprises the steps that normalized power deviation is generated based on a reference value and an output value of active power of the grid-forming type flexible direct current converter and rated angular frequency of a grid-connected system; performing deviation superposition processing on the normalized power deviation according to the damping compensation power deviation to obtain a first power deviation, and performing integration on the first power deviation based on an inertia coefficient to obtain an angular frequency deviation; wherein after the angular frequency deviation is generated each time, the damping compensation power deviation is updated; and according to the angular frequency deviation and the output voltage amplitude of the virtual synchronous machine, generating voltage reference data, and further generating a pulse width modulation signal to control the network-forming flexible DC converter. Therefore, by implementing the method and the device, the problem that high-stability and high-precision power control is difficult to realize at the same time by the traditional strategy of the virtual synchronous machine in the prior art can be solved.

First and second bases are arranged to face each other. An inverter is mounted on either of the first and second bases. A converter is mounted on the first base. A chopper is mounted on the second base. At least some of fins thermally connected to the converter via the first base are thermally connected to the chopper via the second base.

A kind of power device parallel type power module and capacitor charging and discharging method, power module includes two or more than pressure type power device, the two or more than pressure type power device adopts the physical form of half bridge group string upper and lower parallel;The half bridge group string of the pressure type power device is connected in parallel by silicon pile composite busbar;Each power module is provided with pneumatic short-circuit switch, in the case of multiple power module series connection, the pneumatic short-circuit switch is connected in series with all DC capacitors, and charging and discharging is carried out through the ground loop of flexible AC transmission equipment AC, DC valve side;The pneumatic short-circuit switch is connected with gas driving pipeline, and the gas driving pipeline is connected with valve-based gas pressurizing device.The power module can effectively improve the capacity of flexible AC transmission equipment, so that it has short-time frequency modulation capacity output, provides technical scheme support for new power system construction, and guarantees system safety and stability;The provided capacitor charging and discharging method can improve maintenance efficiency and enhance product reliability.

A commutation control method and system for a controllable commutation converter, which detects the DC side voltage and current of the converter at the receiving end of the DC transmission line, and respectively controls the commutation valve group to perform commutation control operations under different states according to the different power magnitudes on both sides of the converter, the pre-judged faults on the AC side and the different fault types. When the AC side operates normally, the control operations of each commutation valve group are carried out according to the normal time sequence. When the current of the current commutation valve group is less than the turn-off current reference value, the current is transferred from the main branch to the auxiliary branch, and then transferred to the next commutation valve group to be commutated through the auxiliary branch; when a fault occurs on the AC side, the turn-off current reference value is adaptively adjusted according to the fault type, and the arrester branch is put into operation while the auxiliary branch is turned off until the main branch current of the next commutation valve group is fully established, and then the arrester branch of the current commutation valve group is disconnected. The present invention realizes different commutation operations based on different conditions, and can effectively avoid the commutation failure of the commutation valve group.

There is provided a power conversion device capable of easily reducing noise (common mode current) flowing out from a switching element via a parasitic capacitance. A power conversion device 1 applies a voltage at a connection point of upper and lower arm switching elements 18A to 18F to a motor 8. A parasitic capacitance between each of the lower arm switching elements 18D to 18F and a chassis 2 (partition wall 3: heatsink) is smaller than a parasitic capacitance between each of the upper arm switching elements 18A to 18C and the chassis 2 (partition wall 3: heatsink). Alternatively, a dielectric constant between each of the lower arm switching elements 18D to 18F and the chassis 2 (partition wall 3: heatsink) is smaller than a dielectric constant between each of the upper arm switching elements 18A to 18C and the chassis 2 (partition wall 3: heatsink).

A system includes: an inverter configured to convert DC power to AC power, wherein the inverter includes: a power module including: a first substrate, a second substrate including a source plane and a gate plane separated from the source plane by a full trench, the source plane including a step trench, and the gate plane including an electrical connection through the second substrate to a gate input connection of the power module, a semiconductor die disposed between the first substrate and the second substrate, the step trench formed in a portion of the source plane corresponding to an edge of the semiconductor die, and the semiconductor die including a gate connected to the gate plane, and a sinter element disposed between the semiconductor die and the second substrate to connect the semiconductor die to the second substrate; a battery; and a motor.

The embodiments of the present disclosure provide a synchronous rectifier module, comprising: a transformer provided with a plurality of secondary windings, a first circuit board and a second circuit board disposed on opposite sides of the transformer, and a first connecting piece electrically connected to the first circuit board and a second connecting piece electrically connected to the second circuit board; the first connecting piece and the second connecting piece comprise current sharing portions connected to the first circuit board and the second circuit board respectively, and inductor portions which penetrate an inductance core side by side to form an output inductor, resistance values of the current sharing portions of the first connecting piece and the second connecting piece being equal or a resistance difference value therebetween being within a preset range. The present disclosure can quickly, accurately and conveniently improve the efficiency and the heat dissipation of the synchronous rectifier module, and achieve a better current sharing effect of the connecting pieces by adjusting the resistance value numerical range of the two connecting pieces.

A first winding is wound around a first middle column of a first magnetic core, and a second winding is wound around a second middle column of a second magnetic core. The third magnetic core is located between the first winding and the second winding, the third magnetic core has a through hole, and both the first middle column and the second middle column extend into the through hole. When a direction of a magnetic field generated by the first winding is the same as a direction of a magnetic field generated the second winding, the first magnetic core and the second magnetic core generate common-mode inductance. When a direction of a magnetic field generated by a third winding is opposite to a direction of a magnetic field generated a fourth winding, the third magnetic core generates differential-mode inductance.

This application provides a photovoltaic inverter and a photovoltaic system. The photovoltaic inverter includes a housing, a circuit board, cooling fins, a switch assembly, and PV ports. The circuit board is reversely fastened in the photovoltaic inverter. The circuit board partitions an accommodating cavity into a first subcavity and a second subcavity, and the first subcavity and the second subcavity accommodate a first device and a second device respectively. The second device includes an inverter power assembly fastened to a rear circuit board side. The cooling fins are located on a side that is of a bottom plate and that is away from a cover plate. The inverter power assembly is in thermally conductive connection to the cooling fins through a thermally conductive contact part. The switch assembly includes a knob, a connecting rod, and a switch body. The switch body includes breaking units. Pins of the breaking units are rigidly fastened to the rear circuit board side. In this application, the circuit board is reversely fastened in the photovoltaic inverter, and a large device is fastened to the rear circuit board side, so that both cooling effect and a product aesthetic feeling are considered. The switch body is rigidly fastened to the rear circuit board side through the pins. This reduces assembly difficulty of the photovoltaic inverter.

The embodiment of the application provides a kind of power conversion equipment, it is related to power electronics field.The power conversion equipment includes shell, circuit board, radiator and first heat exchanger, power cavity is formed in shell, heat dissipation cavity is formed outside shell, shell includes the partition between power cavity and heat dissipation cavity, opening is arranged on the partition, circuit board is arranged in power cavity and the side of opening has first power device;Radiator is arranged in heat dissipation cavity and includes first substrate and first heat dissipation part, first substrate is arranged at opening and is in contact with first power device, first substrate is provided with first gas-liquid passage, first heat dissipation part is provided with second gas-liquid passage communicated with first gas-liquid passage, and cooling working medium for gas-liquid conversion is arranged in first gas-liquid passage;First heat exchanger is located in power cavity or heat dissipation cavity.Through the above technical scheme, the device that can be targeted to heat seriously in power conversion equipment is cooled, so that power conversion equipment is stably operated.

The invention relates to an integrated GaN power device including PFC and QR flyback controllers. An electronic component. The electronic component includes: a base; a first semiconductor device attached to the base and having: a first gallium nitride (GaN)-based switch having a first gate, a first source, and a first drain, the first gate being arranged to control a current flow between the first source and the first drain; and a second GaN-based switch having a second source, a second gate, and a second drain, the second gate coupled to the first gate, and the second drain coupled to the first drain. In one aspect, the electronic assembly also includes a second semiconductor device attached to the base and having: a logic circuit coupled to the second source and arranged to detect an amplitude of the current flow; and a drive circuit coupled to the first gate and the second gate, the drive circuit arranged to control on and off states of the first GaN-based switch and the second GaN-based switch.

An inverter includes a housing and a heat dissipation apparatus. The housing may include a first cavity and a second cavity, and a power semiconductor device is disposed in the first cavity. The second cavity has a first air inlet and a first air outlet, and a magnetic component is disposed in the second cavity. The heat dissipation apparatus includes a radiator and a first fan. The radiator includes an evaporator and a condenser that are connected to each other. The evaporator is disposed in the second cavity. The power semiconductor device is in thermally conductive contact with the evaporator, to dissipate heat for the power semiconductor device. The first fan is disposed in the second cavity, an air inlet side of the first fan faces the first air inlet, and an air outlet side of the first fan faces the first air outlet.

A vehicle drive device (100) includes a rotary electric machine (MG), a power transmission mechanism (GT), an inverter module (INV) configured to control drive of the rotary electric machine (MG), a power supply module (PWR) electrically connected to an onboard battery, a refrigerant circuit module (2) that defines at least part of a refrigerant circuit (20) through which a refrigerant for an onboard air conditioner circulates, and a case (9) including a first housing chamber (E1) that houses the inverter module (INV) and a second housing chamber (E2) that houses the rotary electric machine (MG) and the power transmission mechanism (GT). The power supply module (PWR) and the refrigerant circuit module (2) are attached to the case (9).

The invention provides a multi-bridge-arm integrated valve tower structure, a high-voltage direct-current transformer and a power system. The multi-bridge-arm integrated valve tower structure comprises a high-voltage bridge arm branch, a multiplexing bridge arm branch, a low-voltage bridge arm branch, a high-voltage port and a low-voltage port. One end of the high-voltage bridge arm branch, one end of the low-voltage bridge arm branch and one end of the multiplexing bridge arm branch are connected; the high-voltage bridge arm branch comprises a plurality of first half-bridge sub-modules which are connected in series; the multiplexing bridge arm branch comprises a plurality of second half-bridge sub-modules which are connected in series; the low-voltage bridge arm branch comprises a plurality of full-bridge sub-modules which are connected in series; the number of the first half-bridge sub-modules, the number of the second half-bridge sub-modules and the number of the full-bridge sub-modules are in direct proportion to the voltage withstand level of the valve tower structure. According to the structure, the high-voltage bridge arm branch, the multiplexing bridge arm branch and the low-voltage bridge arm branch are connected in a T-shaped mode, the number of the first half-bridge sub-modules, the number of the second half-bridge sub-modules and the number of the full-bridge sub-modules are determined according to the voltage withstand level needed by the valve tower, and the structure can be suitable for voltages of different levels.

The embodiment of the invention provides a power conversion device, and relates to the technical field of power supplies, the power conversion device is used for power conversion between direct current and alternating current, the power conversion device comprises a device shell, a circuit board and a power inductor, the device shell comprises a top cover and a bottom shell which are fixedly connected, and the top cover and the bottom shell define a containing cavity; the circuit board is located in the containing cavity. The power inductor is located in the containing cavity and fixed between the circuit board and the bottom shell. The power inductor comprises an installation base, a magnetic core, a magnetic ring, a first winding and a second winding. The mounting seat is fixed on the circuit board, the magnetic core and the magnetic ring are both fixed on the mounting seat, the first winding and the second winding are both wound on the magnetic core, one pin of the first winding and one pin of the second winding both penetrate through the magnetic ring, and at least one pin of the first winding and at least one pin of the second winding are both connected with the circuit board. According to the technical scheme, unified installation of the inductor and the magnetic ring is facilitated, installation procedures are reduced, and the risk that the magnetic ring is damaged is also reduced.