70 results about "Cascade circuits" patented technology

The invention discloses a current-to-voltage conversion circuit structure for electroporation delivery. The current-to-voltage conversion circuit structure comprises a current-to-voltage conversion circuit and a voltage-to-pulse conversion circuit. The current-to-voltage circuit converts current signals into voltage through an input signal processing module, high-precision amplification is achieved through an operational amplifier and a feedback network of a signal amplification module, the driving capacity is enhanced through a transistor cascade circuit, and temperature drift is dynamically compensated in combination with a thermistor. The voltage-to-pulse circuit corrects non-linear errors through a resistance network of the linearization processing module, achieves gain adjustment through an operational amplifier and an adjustable resistor, and finally adapts to load changes through a field effect transistor and a negative feedback network. The circuit realizes high conversion precision, wide temperature range stability and load adaptive capability, and is suitable for high-precision scenes such as medical treatment or beauty electroporation, industrial sensing and the like.

The invention provides a PWM / Buck cascade circuit auxiliary electrolytic hydrogen production rectification power supply and a control method, and relates to the technical field of electrolytic hydrogen production power supply and intelligent power grids, and the power supply comprises a main power loop and an auxiliary power loop; the main power loop comprises a multi-pulse thyristor rectifier, the power supply side of the multi-pulse thyristor rectifier is connected with an alternating-current power grid, the load side of the multi-pulse thyristor rectifier is connected with one end of a direct-current smoothing reactor, and the other end of the direct-current smoothing reactor is connected with the electrolytic bath; the auxiliary power loop comprises a PWM rectifier and a Buck circuit which are connected in series, the output end of the Buck circuit is connected to the output end of the main power loop in parallel through a direct-current LC filter, the output end of the Buck circuit and the output end of the main power loop are jointly connected into an electrolytic bath for ripple compensation, the multi-pulse rectifier adopts PI control, the PWM rectifier adopts voltage and current double-closed-loop control and SVPWM modulation, Buck adopts PI and feedforward compound control, and the output end of the Buck circuit and the output end of the main power loop are connected in parallel. The system has the advantages of improving the grid-side electric energy quality, the voltage utilization rate, the water electrolysis hydrogen production efficiency and the operation stability.

The invention discloses a configurable cascade circuit for efficient in-memory processing, which comprises an integrated state machine module, a cascade instruction distributor unit, a configuration register unit, a configurable cascade calculation engine and an on-chip storage unit, and forms a complete in-memory calculation processing chain. The state machine dynamically adjusts the circuit operation state; the cascade instruction distributor unit decomposes a cascade instruction into discrete operation blocks and loads the discrete operation blocks into a plurality of registers in the configuration register unit; the decoder unit generates a control word containing the serial number of the in-memory computing unit and the channel configuration parameters of the in-memory computing unit; and the configurable cascade computing engine enables the corresponding in-memory computing unit according to the control word, and after the in-memory computing unit is driven to complete a specified computing task, intermediate cache data is written into the on-chip storage unit in real time by adopting a double-BRAM dynamic cache strategy. And circularly controlling the iteration work of the calculation unit in the memory until the cascade termination signal triggers and outputs a final calculation result. According to the invention, a calculation-caching-transmission integrated assembly line is constructed.

The invention relates to the field of clean energy electrolysis hydrogen production, in particular to a three-section electrolytic bath hydrogen production power supply system and a power supply control method thereof. According to the system, an alternating current bus module is connected with three-phase alternating current and provides a three-phase alternating current power supply; the power supply conversion module comprises three power supply conversion units, the three power supply conversion units are jointly connected to the alternating current bus module in parallel, and each power supply conversion unit converts the three-phase alternating current power supply into a working direct current power supply; the three-section type electrolytic bath comprises three sub-electrolytic baths which are connected in series, and each sub-electrolytic bath is correspondingly connected with one power supply conversion unit to obtain the working direct-current power supply; the power supply conversion unit comprises a rectification circuit, a three-level BUCK circuit and a resonance LLC cascade circuit which are connected in sequence. According to the invention, accurate power distribution and independent decoupling control of a load section are realized through the independent modular power supply; meanwhile, harmonic interference is restrained, the power factor is improved, and device stress and line loss are reduced.

The utility model discloses a nine-channel constant current drive cascade circuit, and relates to a series of fields requiring intelligent control and memorizing of different scenes, such as LED illuminating lamp dimming, LED control protocols and the like. Comprising a DC power supply DC wiring terminal positive electrode, a DC power supply DC wiring terminal negative electrode, and current limiting resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17 and R18. A protection resistor R19, a protection resistor R20 and a protection resistor R21; the LED lamp further comprises light emitting diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17 and D18. The circuit also comprises capacitors C1, C2 and C3. Comprising backward diodes TD1 and TD2; the system also comprises a TM1926 chip U1, a TM1926 chip U2, and a micro control unit (MCU). The PWM brightness of the output port of the circuit can be independently set through an external controller, the number of peripheral devices is small, the circuit cost can be remarkably reduced, the performance is stable and reliable, and technical support is provided for merging TTL signal fantasy lamps into an integrated Internet of Things system.

The embodiment of the invention discloses a fast charging chip cascade circuit and a control method thereof, and relates to the technical field of switching power supplies, the fast charging chip cascade circuit comprises an AC / DC conversion loop and at least two fast charging chips; the fast charging chip comprises a logic control module, a cascade communication module and a constant voltage loop. The cascade communication module is provided with a cascade pin, a signal receiving pin and a signal sending pin, and the cascade pins of all the quick charge chips are electrically connected; the input end of the logic control module is electrically connected with a signal receiving pin and a signal sending pin in a corresponding fast charging chip, the output end of the logic control module is electrically connected with the constant voltage loop, and the constant voltage loop is electrically connected with the alternating current and direct current conversion loop. The voltage regulation conflict in the cascade state is effectively avoided, and the voltage regulation accuracy of the output voltage is improved.

According to the double-line cascaded LED driving circuit and the communication method thereof provided by the invention, two lines, namely the clock line and the data line, are adopted, and data communication and connection between LED drivers are realized through a communication mode of two-line input and two-line output; meanwhile, the forwarding identification in the input data is obtained through the arranged data cascade circuit in the LED driver, and the clock signal and the data corresponding to the forwarding identification are used as the input driving data of the LED driver of the next level based on the forwarding identification, so that the LED driver of the whole driving unit only needs to drive one LED driver, and the driving efficiency is improved. Therefore, high-speed data transmission can be realized, and meanwhile, the wiring mode between the controller and the LED drivers and the wiring mode between the LED drivers are simplified, and the hardware wiring difficulty is lowered.

A method for contingency table-based bit-stream simulation to enhance simulation speed and precision in systems comprising reconvergent bit-stream paths. By utilizing the disclosed method, which relies on scalar-based processing, users may reduce the probability of correlation errors in design.

The invention discloses an aluminum alloy melt rapid and uniform cooling device and method.The aluminum alloy melt rapid and uniform cooling device comprises a box body, an upper cooling unit, a lower refrigeration cycle unit and a control unit, the upper cooling unit is provided with a plurality of independent controllable coolers, and each independent controllable cooler comprises a heat insulation protection sleeve, a spiral heat exchange pipe, a heat conduction sleeve and a crucible from outside to inside; a thermocouple arranged in a quartz tube at the bottom of the crucible extends to the geometric center of the melt for real-time temperature measurement, the lower part adopts a high-temperature and low-temperature cascade loop for cooling, a safety branch is connected in parallel to maintain low-load operation of the compressor, and a control unit dynamically regulates and controls an electromagnetic valve, the compressor and an expansion valve through a PLC based on temperature measurement data. According to the cooling method, precise temperature control is achieved through system self-inspection, graded starting, temperature threshold value switching and safe shutdown, the multiple melts can be synchronously, rapidly and evenly cooled, the internal temperature difference is reduced, component segregation and structure non-uniformity are restrained, sampling consistency is guaranteed, and reliable support is provided for aluminum alloy melt quality evaluation.

A back-to-back multi-port conversion circuit based on 3N + 3 switch module cascading comprises m input end hexagonal star type cascade circuits, six multi-port converters and n output end hexagonal star type cascade circuits, one end of each input end hexagonal star type cascade circuit is connected with a generator through a three-phase line, and the other end of each input end hexagonal star type cascade circuit is connected with a power supply through a three-phase line. The other end of the input end hexagonal star type cascade circuit is connected with alternating current input ports of the six multi-port converters through six groups of three-phase lines respectively; one end of the output end hexagonal star-shaped cascade circuit is connected with alternating current output ports of the six multi-port converters through six groups of three-phase lines, and the other end of the output end hexagonal star-shaped cascade circuit 3 is output through the three-phase lines. According to the design, the frequency is completely decoupled, the port voltage and current waveform effects are good, the topological port expansion is very flexible, and the developable potential functions are very powerful.

The application provides a cascade circuit of an isolated converter and a control method, wherein the cascade circuit of the isolated converter comprises a control module, a non-isolated converter and an open-loop isolation module. According to the application, the non-isolated converter respectively feeds back a bus voltage determined according to a first duty cycle of the non-isolated converter to the open-loop isolation module and the control module, the open-loop isolation module feeds back an output voltage determined according to the bus voltage to the control module, the control module determines a second duty cycle according to the bus voltage and the output voltage, and feeds back the second duty cycle to the non-isolated converter, and the bus voltage is determined again through the second duty cycle, so that the adjusting speed of the non-isolated converter and the open-loop isolation module of the two stages of the isolated converter is accelerated, the dynamic characteristic is relatively strong, and the application is suitable for fast charging. Meanwhile, the open-loop isolation module is adopted to avoid resource waste, and is especially suitable for the non-isolated converter with a wide voltage regulating range of the front stage.

The utility model provides a cascade power supply circuit and a moving object detection device, and the cascade power supply circuit comprises one or more different cascade units which are sequentially arranged between a battery and a load to form a cascade circuit structure between the battery and the load. The cascade units are arranged to be sequentially connected one by one along an electric energy transmission path between the battery and the load, each cascade unit depends on electric energy supply of the previous cascade unit and stores the electric energy after being connected, so that when the subsequent next cascade unit is connected, the electric energy is jointly obtained from the battery, the current cascade unit and / or the previous cascade unit. Electric energy is provided for the next cascade unit; and when the current sequentially passes through the plurality of cascade units, the cascade units store and transfer electric energy step by step.

The invention provides a power synthesis circuit, a radio frequency circuit, a radio frequency power supply and semiconductor process equipment, and is applied to the technical field of semiconductor equipment, the circuit comprises a plurality of synthesis transformers, the primary side of each synthesis transformer is used for being connected with a power amplification module, and the secondary side of each synthesis transformer is sequentially cascaded to form a cascade circuit; and outputting a synthetic power by the obtained cascade circuit. As the secondary sides of the synthesis transformers are cascaded in sequence, the power synthesis circuit synthesizes and outputs the power provided by the power amplification modules in a voltage superposition form, any two adjacent power amplification modules are isolated through the two synthesis transformers, a balance resistor is cancelled, and when any one power amplification module is abnormal, the power amplification module is switched off. When the abnormal module is detected, only the power reduction value corresponding to the abnormal module is reduced, the output of other power amplification modules in the power synthesis circuit is not influenced, greater power loss is avoided, and the reliability and the stability of the power synthesis circuit in the working process are effectively improved.

The utility model relates to the technical field of photovoltaic power generation, and discloses an inverter topological structure, which comprises an MPPT cascade circuit, a DC voltage conversion circuit and an inverter circuit, and is characterized in that the MPPT cascade circuit can independently track the maximum power of each photovoltaic module string and adjust the output current and the output voltage of each photovoltaic module string; the output of other photovoltaic module strings is adapted, and the wooden barrel effect of the photovoltaic module string of the inverter is solved; the combination of the MPPT cascade circuit and the direct-current voltage conversion circuit realizes the assembly-level maximum power tracking adaptive to the whole range in the single inverter, and can meet the work of a single assembly to provide a voltage source meeting conditions for a post-stage circuit; and the inverter circuit can meet the functional requirements of reactive power dispatching of the power grid.

The embodiment of the invention provides a circuit suitable for on-line monitoring of the on-state voltage drop of a crimping type IGBT, and a silicon carbide cascade circuit comprises at least two silicon carbide JFETs. The first end of the low-voltage clamping circuit is electrically connected with one end of the sampling circuit; the second end of the low-voltage clamping circuit is electrically connected with the other end of the sampling circuit; the third end of the low-voltage clamping circuit is electrically connected with one end of the silicon carbide cascade circuit; the other end of the silicon carbide cascade circuit is used for being connected with one end of a monitored IGBT; and the second end of the low-voltage clamping circuit is also used for being connected with the other end of the monitored IGBT. According to the scheme, the silicon carbide JFETs are cascaded to withstand high voltage of 4.5 kV and above, the voltage on each JFET is distributed in a balanced mode, the output voltage is clamped to be below 5V, meanwhile, the on-state voltage drop of the IGBT can be accurately transmitted to a sampling circuit, meanwhile, the transmission error of the on-state voltage is low, the proposed clamping circuit does not need an additional power supply and a compensation circuit, and the clamping circuit is simple in structure and low in cost. The method has the advantages of high precision, fast response and low cost.

The utility model relates to the technical field of IO-Link, in particular to an IO-Link slave station circuit supporting cascading, which comprises a master control module, a power supply module, a cascading circuit, an IO-Link communication circuit and a digital quantity interface circuit, wherein the master control module is in data communication with IO-Link master station equipment through the IO-Link communication circuit; according to the cascading IO-Link slave station circuit provided by the utility model, an expansion port of a slave station can be cascaded with a slave station by using an IO-Link communication interface, communication between a first-stage slave station and a second-stage slave station can be carried out at a distance of 20m, and the distance between the second-stage slave station and a master station can reach 40m. And thus, higher flexibility is brought to on-site signal acquisition and control.

The invention provides an acquisition circuit and acquisition equipment. The acquisition circuit comprises a power supply end, a load connection end, a multi-channel sampling circuit and a control circuit. The multi-path sampling circuit is electrically connected with the power supply end and the load connection end respectively; and each sampling circuit at least comprises two sampling branches which are connected in parallel. The control circuit comprises a controller and a cascade circuit electrically connected with the controller, the cascade circuit comprises multiple paths of enabling ports, the enabling ports are correspondingly and electrically connected with the sampling branches, and the controller controls the multiple paths of sampling circuits to perform independent sampling or synchronous sampling through the multiple paths of enabling ports; wherein one corresponding sampling branch is controlled to perform sampling through one enabling port. According to the sampling circuit, independent sampling or synchronous sampling of the multiple sampling circuits can be achieved, so that the multi-channel testing requirement is met, each sampling circuit can control the corresponding sampling branch to conduct sampling according to the actual situation, accurate testing is achieved, the testing requirement is met, and the user experience is improved.

The application discloses a series connection unit cascade circuit and a high-voltage cascade device, and relates to the field of circuit design.The series connection unit cascade circuit comprises a first series connection unit, a second series connection unit, a voltage dividing circuit, a floating ground and a floating resistor.The first series connection unit and the second series connection unit are connected in series to meet the high-voltage requirement of the high-voltage cascade device, and the power supply ends of the first series connection unit and the second series connection unit are connected with the floating ground through the voltage dividing circuit.The floating ground is connected with the ground through the floating resistor, so that the highest voltage between the devices in the first series connection unit and the second series connection unit and the floating ground at any time will not be greater than the voltage of the power supply for supplying power to the series connection unit, thereby solving the working voltage endurance problem of the devices in the series connection unit, and enabling the high-voltage cascade device to integrate more series connection units.

The present invention discloses a two-stage auto-cascade refrigeration system comprising: a high-temperature single refrigeration circuit, formed by a high-temperature compressor, a high-temperature condenser, an intermediate heat exchanger, and a high-temperature gas-liquid separator connected via refrigerant gas-liquid pipes; and a low-temperature auto-cascade circuit, formed by a low-temperature compressor, an intermediate heat exchanger, a multi-stage condenser evaporator, a multi-stage gas-liquid separator, a regenerator, and an evaporator connected via refrigerant gas-liquid pipes. The refrigerant discharged from the high-temperature compressor can undergo heat exchange with the gaseous refrigerant discharged from the low-temperature compressor within the intermediate heat exchanger to condense the low-temperature gaseous refrigerant, thereby maintaining a constant temperature of the refrigerant flowing from the intermediate heat exchanger into the multi-stage condenser evaporator. This invention solves the problems of large temperature fluctuations and poor operational stability in existing auto-cascade systems.

This disclosure is directed to digital front-end circuitry of a memory device having widened operating frequency bandwidth. The digital front-end circuitry may include a receiver including a variable gain amplifier (VGA) and a continuous time linear equalizer (CTLE) integrated on three cascaded circuit stages. A first stage of the three cascaded circuit stages may include a first portion of the VGA and a first portion of the CTLE, a second stage may include a remaining portion of the VGA, and a third stage may include a remaining portion of the CTLE. Having three cascaded circuit stages (e.g., including the remaining portion of the CTLE) as opposed to two cascaded stages may widen the operating frequency bandwidth of the receiver. The third stage may be programmable to be activated or deactivated.

The invention relates to the technical field of electronic testing, in particular to a scattering parameter determination and de-embedding method and device of a welding type test fixture and a medium. The method comprises the following steps: obtaining the insertion loss of a test fixture; acquiring an impedance change curve of a first cascade circuit where the test fixture is located; wherein the first cascade circuit is a cascade circuit formed by welding the test fixture on a test welding point of a tested object; fitting the impedance change curve through an artificial circuit of the first cascade circuit to obtain impedance and time delay of the test fixture in a first welding state of forming the first cascade circuit; and determining a scattering parameter value of the test fixture in the first welding state based on the impedance, the time delay and the insertion loss.

The application provides a row scanning unit, a row scanning cascade circuit and a driving method. The row scanning unit comprises an input module, an output module, a pull-down maintenance control module, a maintenance module, a pull-down module, a first reset module and a second reset module. By connecting each module in the row scanning unit with at least one of the first node and the second node, the mutual restriction of each module is realized, the residual charge in the row scanning unit can be released while the output function of the row scanning unit is realized, so that the reset and zero of the entire row scanning unit can be realized faster and better, and the problems of low leakage current of Oxide TFT and easy charge residue are improved.

A cascade MosFet circuit design for variable gear switching using pulse width modulation (PWM) between electronic gears to achieve a smooth transition is disclosed. In an embodiment, in the system, there can be three separate stages of two or more switches from very low amperage to hundreds of amps that can be automatically selected within a chosen stage. The automatic switching can be programmed to be power (e.g., current) sensitive or can be both power and electronic gear sensitive as to cascade into the right MosFet combination for different gear settings and still select greater values for varying power levels. Such a smooth transition can allow the generator or motor using such cascade MosFet circuit design to operate more efficiently and / or more quietly.

A digital pre-distortion (DPD) module according to one embodiment of the present disclosure comprises: at least one memory for storing at least one look-up table (LUT) group including at least one LUT determined on the basis of characteristics of a plurality of power amplifiers; a plurality of bit concatenation circuits for extracting, on the basis of the number of bits allocated to each LUT, consecutive bits of data output from the memory; and a DPD circuit for identifying each LUT on the basis of data output from the plurality of bit concatenation circuits, determining a DPD model on the basis of each LUT, and performing, on the basis of the DPD model, pre-distortion on at least one power amplifier with respect to an input signal input into the at least one power amplifier.

The present application provides a wireless power receiving circuit, a wireless charging system, an electronic device, and a charging method. A first bridge arm and a second bridge arm are provided and a connection relationship between the two bridge arms and a DCDC converter is configured, so that the two bridge arms and the DCDC converter are not in a cascaded relationship, and the two bridge arms and the DCDC converter are used in cooperation when an alternating current signal is processed, and are not independent of each other but affect each other. Therefore, the wireless power receiving circuit comprising the two bridge arms and the DCDC converter belongs to a single-stage circuit solution, loss generated when a battery is charged is single-stage loss, and compared with multi-stage loss in a multi-stage cascaded circuit solution, the energy loss during charging can be effectively reduced, improving the charging efficiency.

The invention discloses a high-voltage power switch circuit for an intelligent fusion terminal switch power supply. The circuit comprises a voltage clamping circuit and an MOS tube cascade circuit. The voltage clamping circuit is connected in parallel between the DC bus voltage end and the grounding end, and forms a clamping voltage according to the first voltage and outputs the clamping voltage through the clamping output node. The MOS tube cascade circuit comprises a transformer and a cascade switch branch formed by connecting a first MOS tube and a second MOS tube in series, one end of the primary winding is connected with a first voltage, and the other end of the primary winding is grounded through the cascade switch branch; clamping voltage is connected to the grid electrode of the first MOS tube, grid electrode driving signals are connected to the grid electrode of the second MOS tube, and a voltage stabilizing diode is connected between the grid electrode and the source electrode of the first MOS tube in parallel. On-off is controlled through a grid driving signal, upper tube grid source driving is established under voltage limiting of a voltage stabilizing diode, controlled on-off of a primary side is achieved, dependence on a single ultrahigh-voltage-resistant MOS device is reduced, and the problems that model selection is limited and cost is high under high-voltage input are solved.

The present application discloses a sensor circuit, an MCU liquid level sensor and an ink cartridge. The sensor circuit includes a power supply circuit, a control circuit and a sensing circuit. The power supply circuit includes a comparator, a heating branch, a diode circuit, a selection circuit and a cascade circuit. The comparator and the heating branch are respectively connected to the cascade circuit, and the diode circuit is electrically connected to the selection circuit. The control circuit is electrically connected to the selection circuit and is used to control the operation of the selection circuit to directly connect the diode circuit to the cascade circuit or connect it to the heating branch. The sensing circuit is electrically connected to the cascade circuit and is used to output a liquid level signal of the liquid. In the present application, the control circuit controls the diode circuit to connect to the heating branch to achieve the heating function, and the control circuit controls the diode circuit to directly connect to the cascade circuit to achieve the liquid level detection function. Its control method is flexible, and a set of control circuits can control the heating and liquid level detection functions at the same time, simplifying the circuit structure and saving costs.

The present application discloses a carry logic circuit, a carry cascade circuit, and a chip. The carry logic circuit comprises Y stages of cascaded carry operation modules and a carry output module; each stage of carry operation module is used for receiving i pairs of arithmetic signals; a first-stage carry operation module is used for outputting a first-stage carry generation signal and outputting a first-stage carry propagation signal; an x th-stage carry operation module is further used for receiving a previous-stage carry generation signal and a previous-stage carry propagation signal, outputting an x th-stage carry generation signal, and outputting an x th-stage carry propagation signal; and the carry output module is used for receiving an initial carry signal, a Y th-stage carry generation signal, and a Y th-stage carry propagation signal, and outputting a first carry signal. The present application improves the carry operation performance of the carry logic circuit.

The utility model provides a circuit for realizing nozzle cascade based on an SATA (Serial Advanced Technology Attachment) line, and relates to the field of nozzle circuit diagrams.The circuit comprises an SATA port, a plurality of SATA-IN ports and a plurality of SATA-OUT ports, the SATA port is arranged in a main board, the SATA-IN ports and the SATA-OUT ports are respectively arranged in a head board, the SATA port is arranged in the main board, and the SATA-IN ports and the SATA-OUT ports are arranged in the head board. Coding switch control is arranged between the SATA port and the SATA-IN port, and coding switch control is arranged between the SATA-OUT port and the SATA-IN port, and coding switch control is arranged between the SATA-OUT port and the SATA-IN port. According to the utility model, the SATA-IN port and the SATA-OUT port are arranged in the head plate, two adjacent head plates can communicate with each other, a plurality of nozzles can be controlled to print at the same time, the circuit is simple, the manufacturing and maintenance cost is low, the shielding effect of the SATA wire is good, and the anti-EMC capability is improved fundamentally.

The present invention discloses a bidirectional DC / DC converter and control method for an active composite energy storage system for an electric-driven workover rig in an oilfield. This converter addresses the complex circuit structure and control difficulties associated with conventional lithium battery-supercapacitor composite energy storage devices that utilize two dual DC / DC converters. The bidirectional DC / DC converter comprises a cascade circuit consisting of a diode acting as a selector switch in the main circuit, a first inductor, a second inductor, and a third inductor, as well as upper and lower bridge arm switches. The unidirectional conduction performance of the diode and the stable control of the switches in the cascade circuit ensure that the lithium battery continuously outputs stable power, while the supercapacitor can be frequently charged and discharged to compensate for the peak power required by the workover rig and absorb the energy generated by the workover rig's motor. The cascade circuit also reduces current ripple and reduces stress on the switching devices during switching. The present invention utilizes a single dual DC / DC converter to simultaneously control both power sources in the workover rig composite energy storage system, achieving a composite power supply charging and discharging mode with the lithium battery as the primary power source and the supercapacitor as the secondary power source. This simplifies the circuit structure, reduces control difficulty and equipment cost, and reduces stress on the switching devices in the circuit, making it an economically viable solution.