54 results about "Voltage inverter" patented technology

The invention relates to the technical field of photovoltaic inverter grid connection, and discloses a photovoltaic panel assembly insulation impedance fault positioning method, a storage medium and a system. Comprising the steps of collecting voltage between positive and negative electrodes of an inverter under first voltage, voltage to ground of the negative electrode of the inverter and a direct-current component of leakage current of an output end, close to a power grid side, of the inverter; collecting the voltage between the positive electrode and the negative electrode of the inverter under the second voltage after voltage disturbance, the voltage to ground of the negative electrode of the inverter and the direct-current component of the leakage current of the output end, close to the power grid side, of the inverter; calculating a first insulation resistance value corresponding to the plurality of photovoltaic panel assemblies under the first voltage, and calculating a second insulation resistance value of the plurality of photovoltaic panel assemblies under the second voltage; and according to the first insulation resistance value and the second insulation resistance value, positioning the photovoltaic panel assembly with the insulation resistance abnormity. According to the invention, the accurate positioning of the insulation fault of the photovoltaic panel assembly level is realized, and the specific photovoltaic panel assembly with the insulation abnormity can be accurately identified from the series photovoltaic string.

1. Name of the designed product: single-phase low-voltage inverter. 2. Use of the designed product: used for converting variable current voltage generated by photovoltaic solar panels into single-phase alternating current. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

1. The name of the design product: ultra-thin vehicle-mounted high-voltage inverter. 2. The use of the design product: inverter for automobile. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

Power control device (10), comprising: a first smoothing capacitor (30) configured to smooth the output of a high-voltage battery (1) of a vehicle; a boost converter (40) configured to boost a voltage smoothed by the first smoothing capacitor (30); a second smoothing capacitor (50) configured to smooth the output of the boost converter (40); an inverter unit (60) to which a voltage smoothed by the second smoothing capacitor (50) is input; a gate control unit (80) configured to perform a discharge operation to discharge the first smoothing capacitor (30) and the second smoothing capacitor (50); a backup power supply unit (70A, 70B) connected to the first smoothing capacitor (30) or the second smoothing capacitor (50) and configured to supply power to the gate control unit (80); and an output voltage switching unit (100) configured to adjust the voltage of the backup power supply unit (70A, 70B) during normal operation to be equal to or lower than a voltage supplied to the gate control unit (80) from an auxiliary battery (3), and to switch the voltage of the backup power supply unit (70A, 70B) during discharge operation by the gate control unit (80) to be equal to or higher than the voltage supplied from the auxiliary battery (3).

A kind of AC power supply system for power supply end can be grounded, in the scheme, the input end of power electronic transformer is connected with medium-high voltage network, and the output end is connected with the low-voltage DC bus;The input end of the low-voltage inverter DC / AC device is connected with the low-voltage DC bus, and the output end is connected with low-voltage AC load and grounded;Multiple non-isolated DC / DC device input end is connected in parallel to the low-voltage DC bus, and the output end is respectively connected with low-voltage DC load.In the scheme, three-phase four-wire or three-phase five-wire system is constructed in AC power supply side, the problem of lack of ground line system when three-phase three-wire system inverter is powered is solved.In addition, star-connected capacitor is installed on the output side of low-voltage inverter DC / AC device and connected with the input side of non-isolated DC / DC device, low-impedance loop of common-mode voltage is constructed, common-mode voltage from DC side to AC side can be effectively suppressed, and the problem of common-mode voltage of non-isolated AC power supply circuit being too large to interfere with power supply process is solved.

1. The name of the design product: inverter (single-phase low-voltage inverter LS2). 2. The use of the design product: energy storage inverter. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model relates to the technical field of generator inverters, in particular to a double-voltage inverter, which comprises a power plug, a permanent magnet motor, a rectifier bridge, a protection circuit, a filter voltage stabilizing circuit and a power amplification circuit. The rectifier bridge comprises an inductor L1, an inductor L2, a transistor Q1, a transistor Q2, a transistor Q3 and a transistor Q4, the inductor L1 is connected with a live wire of the power plug, the inductor L2 is connected with a neutral wire of the power plug, one end of the transistor Q1 and one end of the transistor Q2 are respectively connected with the inductor L1, one end of the transistor Q3 and one end of the transistor Q4 are respectively connected with the inductor L2, and the inductor L2 is connected with the neutral wire of the power plug. And the other end of the transistor Q1 is connected with the other end of the transistor Q3, and the other end of the transistor Q2 is connected with the other end of the transistor Q4, so that the problems of complex structure and electronic circuit, high cost, large size and heavy weight of the existing double-voltage inverter motor of the generator are solved.

1. Name of the product in this design: Large single-phase high-voltage inverter. 2. Purpose of this design: To convert the variable current and voltage generated by a photovoltaic solar panel into single-phase alternating current. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention discloses a motor redundancy control system suitable for manned electric helicopters. The system includes: a current sensor, a three-phase voltage sensor, a motor position sensor, an inverse converter module, a motor control algorithm module, a current fault diagnosis and reconstruction module, a Clarke voltage inverter module, a speed and position monitoring module, and a position / speed signal fault diagnosis and reconstruction module. Applying this system ensures the flight safety of manned electric helicopters, preventing crashes due to power loss. This control system primarily addresses the current and position sensors, which are prone to failure during cruise in manned electric helicopters. Different redundancy control methods are proposed for each. When current and position sensors malfunction, the system can quickly diagnose the fault and reconstruct the position and current information using position and current reconstruction methods respectively. The fault information is then uploaded to the flight assistance display and control system to alert the pilot, allowing for an emergency landing at a suitable location, thus ensuring the stable operation of the manned electric helicopter's motor control system.

A voltage balancer and a method of driving the same are provided. The method includes sensing a first voltage between two terminals of an inverter, a second voltage between one of the two terminals of the inverter and a neutral point located between the two terminals of the inverter, and a third voltage between the other of the two terminals of the inverter and the neutral point based on a power supply system is in an off-grid state; turning on at least one switch pair among a plurality of switches included in the voltage balancer based on the first voltage; controlling a duty ratio of each driving switch that is not turned on among the plurality of switches, based on a result of comparing the second voltage with the third voltage; and driving each driving switch based on the controlled duty ratio.

The utility model relates to the technical field of insulation detection, and discloses a vehicle-mounted high-voltage inverter power supply insulation detection device which comprises an insulation detection starting circuit, an insulation resistance detection circuit and a detection feedback circuit. The insulation resistance detection circuit comprises a first resistance voltage division loop and a second resistance voltage division loop, and the detection feedback circuit comprises a signal processing circuit and a sound-light alarm loop. According to the utility model, the connection or disconnection of the first resistance voltage division loop and the second resistance voltage division loop is controlled to realize the unbalanced bridge of the insulation resistance detection circuit, and the voltage values of the two resistance voltage division loops are read through the signal processing circuit, so that the insulation resistance values R + and R-of the high-voltage inverter power supply to be detected are calculated. The circuit has the characteristics of light weight, miniaturization and fast response speed, a sampling loop is isolated from a signal loop through signal processing, and the sampling precision is improved. And the unbalanced bridge for detecting the insulation resistance is realized by controlling the relay, so that the detection accuracy is improved.

The application relates to the technical field of new energy power system control, and relates to a grid-connected new energy reactive power fast response control method and system based on a non-singular fast terminal sliding mode control. Active power and reactive power of a power grid side are collected to input a virtual synchronous machine control, voltage reference values and phase angle reference values are calculated, the voltage reference values and the phase angle reference values output by the virtual synchronous machine control are combined into three-phase voltage, and the output current and voltage of an inverter are converted into d-axis current and voltage and q-axis current and voltage through coordinate conversion; the d-axis current and the q-axis current are input into adaptive virtual impedance control to obtain d-axis reference voltage and q-axis reference voltage; voltage and current double-loop control is carried out according to the d-axis reference voltage and the q-axis reference voltage to generate SVPWM signals. The application realizes fast, low overshoot and zero static error reactive step response under a weak grid condition.

Power control system (12) of a hybrid vehicle (10), wherein the system comprises: a battery (28), a converter (46) that converts a DC voltage from the battery (28) into a DC voltage with a different level by switching switching elements and then outputs the converted voltage, a converter (44) that converts an output of the converter (46) into an electric motor drive current, an electric motor (24) which is driven by the electric motor drive current from the inverter (44), a control device (32) which, when there is a warm-up request for the battery (28), causes the first to fourth carrier frequencies (F1, F2, F3, F4), which are carrier frequencies in the switching control of the switching elements, to be lower than a normal carrier frequency (FA), which is a carrier frequency in the case where there is no warm-up request for the battery (28), and a machine (20), wherein the hybrid vehicle (10) drives using the electric motor (24) and / or the machine (20) as a power source, The first carrier frequency (F1) is a carrier frequency when there is a warm-up request when the machine (20) is in operation, and when there is an acceleration request. The second carrier frequency (F2) is a carrier frequency when there is a warm-up request when the machine (20) is in operation, and when there is no acceleration request. The third carrier frequency (F3) is a carrier frequency when there is a warm-up request, the machine (20) is not in operation, and when there is an acceleration request, and The fourth carrier frequency (F4) is a carrier frequency when there is a warm-up request, the machine (20) is not in operation, and when there is no acceleration request. where the first carrier frequency (F1) is smaller than the second carrier frequency (F2), the second carrier frequency (F2) is smaller than the third carrier frequency (F3), and the third carrier frequency (F3) is smaller than the fourth carrier frequency (F4).

The invention discloses a wide input voltage inverter system with a dynamic regulation function and a working method, and particularly relates to the technical field of electric power and industrial control, and the wide input voltage inverter system is characterized in that based on a unified timestamp and a ring cache, standardized observation with observation confidence is acquired and solidified as a unique data entry; and generating a boundary vector which can be directly called through combined observation. The system combines a parallel operation graph model and link quality, on the premise that an external interface is not changed, security layer projection and time domain smoothing are carried out on reference quantity and parameter increment, and small-step consistency constraint is applied; and performing differential setting according to the scene or mode labels. Monitoring is executed, judgment is carried out around deviation, boundary approximation and saturation signs, graded degradation such as limited power, bandwidth shrinkage, freezing consistency updating, non-impact switching or ordered shutdown is carried out according to a set sequence, and ordered recovery is carried out after hysteresis and residence conditions are met; statistical feedback is used for updating a cross-cycle confidence coefficient and conservative degree base line, and safe operation under the complex parallel operation working condition is achieved.

1. Name of the product in this design: Dual-voltage frequency converter housing (digital generator). 2. Application of this design: This design is used for the housing of a dual-voltage digital generator frequency converter. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention relates to an instant-combustion type pulse ignition controller for timing or dry-burning-resistant valve closing of a gas cooker. The instant-combustion type pulse ignition controller comprises a direct-current power supply, an oscillating circuit, a high-voltage generating circuit, a time delay circuit, a voltage inverter, a first suction valve time delay circuit, a second suction valve time delay circuit, a first thermocouple double-coil electromagnetic valve and a second thermocouple double-coil electromagnetic valve, one end of the oscillating circuit is used for being connected with an ignition switch of the gas cooker, the other end of the oscillating circuit is connected with the high-voltage generating circuit, the high-voltage generating circuit outputs high-voltage pulses for igniting the cooker, one end of the time-delay circuit is connected with the high-voltage generating circuit, and the other end of the time-delay circuit is connected with the voltage inverter. The output end of the voltage inverter is connected with a first suction valve time-delay circuit and a second suction valve time-delay circuit which are connected in parallel, and the two thermocouple double-coil electromagnetic valves are controlled to be opened or closed through the two suction valve time-delay circuits. The valve can still be effectively opened under the condition that the negative electrode of the power supply is grounded, and the double functions of opening the valve through instant combustion and simply and reliably closing the valve are achieved.

The invention discloses a power take-off power generation and power supply system for a high-power engine. The power take-off power generation and power supply system comprises a high-power power take-off power generation device, a system controller, a high-voltage inverter, an energy storage battery box, an integrated high-voltage power distribution and transformation power transformation system, a cooling heat dissipation device and the engine. A power take-off power generation system is conveniently and additionally arranged on a vehicle without a power take-off power generation structure, and the generated power is higher than that of a belt power take-off scheme. The engine power take-off power generation and power supply system is wide in adaptability and can be additionally arranged on various vehicles provided with common engines theoretically, and due to the fact that fans and connecting structures of the fans and engine crankshafts are designed at the front ends of engines of most vehicles, the economical efficiency of the vehicles is improved; the engine load rate of the engine under the low load condition can be improved through the power take-off generator, and then the working efficiency of the engine is improved; and on the other hand, after the structure is additionally arranged, other accessories adopting belt power take-off of the original vehicle can be all canceled.

A motor drive circuit (2) includes an inverter circuit (4) having a switching element and an inverter protection circuit (1), the inverter circuit (4) generating a drive voltage to be applied to a motor (M). An inverter protection circuit (1) is provided with: a first resistor (R1) connected between an inverter circuit (4) and a positive-side power supply line (7) that supplies a constant voltage to the inverter circuit (4); a first detection circuit (11) that outputs a first detection signal (E1) indicating that a ground fault or an inter-phase short circuit has been detected on the basis of the current flowing through the first resistor (R1); and a first protection circuit (12) that cuts off the supply of a signal for driving the switching element on the basis of the first detection signal (E1).

A high-voltage power supply system including a high-voltage regulator, a function generator, and a triggering circuit. The high-voltage regulator includes a microcontroller, a digital-to-analog convertor in communication with the microcontroller, and a high-voltage DC-DC converter in communication with the digital-to-analog converter. The function generator includes a high-voltage inverter including one or more MOSFET switches. The high-voltage inverter is in communication with the microcontroller of the high-voltage regulator. The triggering circuit includes one or more high-voltage electromechanical switches.

This design prevents accidental opening of the hood, protecting high-voltage equipment such as the high-voltage battery, high-voltage inverter, and high-voltage power lines for the main drive source, which are mounted in the space under the hood, from water droplets, thereby ensuring worker safety and providing a hood that facilitates maintenance work. [Solution] High-voltage equipment 36 is installed in the space 28 under the bonnet of the electric construction machine 10. The bonnet 30 that covers the high-voltage equipment 36 from above includes a plurality of panels 31-33 that are attached and fixed by a tool, and is opened by releasing the attachment and fixing of the panels by a tool.

The utility model discloses a power supply circuit for multiple radioactive sources and static CT equipment. The power supply circuit comprises a rotor part power supply adapter plate, an AC power distribution unit, an AC power line connected with the input end of the AC power distribution unit, a DC power distribution unit and a DC power line connected with the input end of the DC power distribution unit. Wherein the alternating-current power distribution unit is composed of one or more power distribution boards, and the multiple power distribution boards are connected in sequence in a chain type power supply mode; each power distribution board corresponds to a group of high-voltage inverter boxes, and provides an alternating-current working power supply in a radiation power supply mode; the direct current power distribution unit is composed of one or more terminal block groups, and the power input ends of the terminal block groups are connected with a direct current power line in parallel. And each direct-current power line terminal block group is formed by connecting M terminal blocks in a chain type power supply mode, and provides a direct-current working power supply for the high-voltage inverter box.

Disclosed are systems, method, devices, and other implementations, including a voltage inverter system that includes multiple modular phase circuits to invert DC voltage into a multiple phase AC output voltage provided to an electrical grid, with each of the modular phase circuits including a reconfigured stacked dual-active-half-bridge (DAHB) circuit folded across a galvanic isolation between a primary side and a secondary side of the DAHB to stack the primary side in series with the secondary side, and one or more controllers to control electrical operation of the multiple modular phase circuits. In some embodiments, the reconfigured stacked DAHB circuits of the multiple modular phase circuits may be configured to perform partial power processing. In some examples, the controllers can be configured to maintain soft-switching operations for switching devices coupled to capacitors of the stacked DAHB circuits, or maintain substantially constant switching frequencies for the stacked DAHB circuits.

The invention provides a multi-level power converter fault tolerance method, which comprises the following steps of: acquiring an output voltage, an inverter side current and a direct current side voltage, performing conversion, and performing PI modulation to obtain a modulation wave of a system; judging whether the system has a fault or not, and judging a specific fault-tolerant scheme according to the modulation degree of the modulation wave if the system has the fault; based on a fault-tolerant scheme, selecting an output state of a redundant vector of a non-fault phase; and based on the selected output state, generating a corresponding driving signal through carrier phase-shifting PWM (Pulse-Width Modulation). The multi-level hybrid topology can keep the same working state before and after the fault, the floating capacitor voltage and the direct current side capacitor voltage are stable, the fault response is rapid, the large-range fluctuation of the output voltage and the output current is avoided, the smooth switching of the working modes is ensured, and the fault tolerance of the system is improved.

Secondary sub-circuit (6) for supplying power to an electrical energy storage unit (2), this secondary sub-circuit being capable of exchanging electrical energy without contact by inductive coupling with a primary sub-circuit (4) capable of being connected to a voltage network, and this secondary sub-circuit also being capable of being connected to an electrical energy storage unit, this sub-circuit comprising: - three secondary inductive cells (20), each capable of exchanging electrical energy without contact by inductive coupling with a respective primary inductive cell (10) of the primary sub-circuit, - an inverter / rectifier (23), receiving on its AC input the three-phase voltage corresponding to the three secondary inductive cells (20) and receiving on its DC input a voltage suitable for being connected to the terminals of the electrical energy storage unit (2),the inverter / rectifier (23) comprising a plurality of switching arms (24) mounted in parallel, each switching arm (24) comprising two controllable electronic switches (12) mounted on either side of a midpoint (25), and - a control unit (3) configured to control the controllable electronic switches (12) of the switching arms (24) so ​​as to achieve impedance matching of the impedance on the AC input of this inverter / rectifier (23), independently of the impedance of the electrical energy storage unit (2).

This utility model discloses a low-noise air-to-water cooling unit with suction-type cooling, belonging to the technical field of inverter cooling devices. It includes an indoor inverter with multiple exhaust fans mounted on top. The exhaust ducts of the fans are connected to a ductwork. The right end of the ductwork extends through the right side wall and is equipped with an electric damper. A rainproof louvered fresh air filter is embedded in the left wall of the high-voltage inverter. The electric damper and the rainproof louvered fresh air filter open and close synchronously. The cooling device includes an outdoor enclosure connected to the return air inlet of the ductwork. Inside the enclosure, a heat exchanger and an evaporator are installed sequentially from right to left. A baffle plate connected to the inner wall of the enclosure is located on the right side of the heat exchanger. A shell-and-tube heat exchanger and a compressor are installed within the space formed by the baffle plate and the inner wall of the enclosure. A fan connected to the left side of the enclosure is embedded in the right wall of the inverter. This utility model can solve problems such as high temperature, negative pressure, dust, and noise, and has an automatic emergency handling function in case of cooling device failure.

1. Name of the product in this design: Central Air Conditioning Low-Voltage Inverter Cabinet. 2. Purpose of this design: Used as a low-voltage inverter cabinet for central air conditioning. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1. 5. The bottom surface of this product is a part that is not easily seen or cannot be seen during use, so the bottom view is omitted.

The invention discloses a photovoltaic station frequency and voltage adaptive cooperative support control method and system, and a medium. According to the method, required input data is obtained and preprocessed, then an operation mode is selected according to a judgment result, different controller reference values and control instructions of a voltage inverter and a direct-current converter of a photovoltaic station are obtained through calculation, and frequency and voltage collaborative support is provided for a power grid at the same time. According to the photovoltaic field station frequency and voltage self-adaptive cooperative support control method adapting to the power grid operation requirements, frequency events, voltage events and factors such as mutual influence of the frequency events and the voltage events are considered at the same time, actual problems are better met, and universality is high; the method has important significance and very high practical value for promoting a photovoltaic station to actively participate in an emerging auxiliary service market and improving the frequency and voltage safety and stability of a novel power system, and can be widely applied to the technical field of new energy.

The invention discloses a motor home high-voltage battery management system, and the system comprises a high-voltage battery pack module which is provided with a high-voltage battery pack used for storing energy, a PDU used for high-voltage power distribution, and a BMS slave used for detecting the high-voltage battery pack; the multi-source energy supply module is provided with a photovoltaic power supply assembly and a direct current quick charge interface; the living power conversion module is provided with a high-voltage inverter and a high-voltage DC-DC converter which are electrically connected with the PDU; and a BMS host. The BMS host can control the direct current fast charging interface to charge the high-voltage battery pack and control the photovoltaic charging controller to adjust the output electric energy of the photovoltaic power generation panel to charge the high-voltage battery pack. According to the invention, the design is novel, the electrical system is simple, the high-voltage battery of the motor home, especially the fuel motor home, can be mounted on the motor home, the rapid energy supplement requirement of power utilization of the motor home is met, the energy supplement in a driving or parking scene can be realized, the battery pack can be physically decomposed, the safety is extremely high, and the application prospect is wide.

The invention discloses an inverter control method and device, equipment, a medium and a product. The method comprises the steps of obtaining an actual three-phase voltage of a power grid in a previous adjustment period and an actual three-phase current output by an inverter; according to the first adjustment amount of the frequency, the second adjustment amount of the frequency and the preset rated frequency, the expected frequency output by the inverter is determined, the first adjustment amount of the frequency represents the rotor characteristics of the synchronous generator, and the second adjustment amount of the frequency is calculated based on the actual three-phase voltage of the power grid; the first adjustment amount of the frequency is in negative correlation with the strength of the power grid; determining expected active power output by the inverter according to the expected frequency and the rated frequency; determining expected reactive power output by the inverter according to the actual three-phase voltage and a preset rated voltage; and generating a control signal of the inverter according to the expected active power, the expected reactive power and the actual three-phase current, and controlling the inverter based on the control signal. According to the embodiment of the invention, dual characteristics of network construction and network following can be realized.

1. Name of the product in this design: Low-voltage energy storage inverter. 2. Purpose of this design: for low-voltage inverter operation and energy storage in new energy power generation systems. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.