29 results about "Dummy load" patented technology

The invention provides an adaptive switching method and device for an energy obtaining mode based on a radio frequency energy supply tag, relates to the technical field of circuit control, and is applied to an energy obtaining circuit. The energy obtaining circuit comprises a rectifier, an energy storage capacitor, a charge pump, a switched capacitor type step-down circuit, a low dropout linear regulator, a dummy load, a full charge judgment circuit, a clock generator, a timer and a switch control circuit. The method comprises the steps of obtaining direct-current voltage output by a rectifier; a dummy load is connected to the direct-current voltage, and a timer is started for timing; in the timing process, whether the direct current voltage reaches a preset threshold value or not is detected through a full-power judgment circuit, and a detection result is obtained; and based on the detection result and the timing ending signal, the control switch selects an energy storage mode or a direct connection mode to supply power to the radio frequency energy supply tag. In the mode, the energy storage mode and the direct connection mode are adaptively switched according to the magnitude of the radio frequency energy, high sensitivity and quick response are both considered, and the adaptability and the checking efficiency of the tag in a variable environment are remarkably improved.

The utility model belongs to the technical field of power supplies, and particularly relates to a sectional type self-adjusting dummy load device which comprises a first control circuit used for outputting a first control signal; the second control circuit is used for outputting a second control signal; the third control circuit is used for outputting a third control signal; and the dummy load power regulation circuit is used for changing the power of the dummy load according to the first control signal, the second control signal and the third control signal so as to maintain the stability of the output voltage. According to the invention, unstable factors such as output oscillation of each voltage section and the like can be solved, and the dummy load can be in a relatively low operation level, so that the power supply efficiency is improved.

The application discloses a liquid cooling dummy load testing device, system and method. The device comprises a case, a mainboard in the case and a plurality of simulated heat generating components on the mainboard. The mainboard comprises a plurality of partitions, each of which comprises a first fixing device and a first signal connecting device for connecting the simulated heat generating components, and a buried wire for power supply and signal transmission. Each simulated heat generating component comprises a second fixing device and a second signal connecting device for connecting the mainboard, a temperature sensor and a remotely controllable adjustable heating device. The simulated heat generating component is used for simulating a target component generating heat in a server, and the target component at least comprises a hard disk, a CPU, a GPU and a memory. The application solves the technical problem of lacking effective testing means for direct contact type liquid cooling cabinets in the related art.

1. Name of the designed product: digital television transmitter (dummy load). 2. Use of the designed product: for digital television transmitter. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view.

The invention discloses a flyback switching power supply and a cross regulation rate control method and circuit thereof, and belongs to the technical field of switching power supplies, the switching power supply comprises at least one main path output and one auxiliary path output, and the method comprises the following steps: detecting a first load state of the main path output and a second load state of the auxiliary path output; according to the first load state and the second load state, dynamically controlling the connection and disconnection of a controllable dummy load circuit connected in parallel with the main circuit output; and when the first load state represents that the main circuit is in a light-load or no-load state and the second load state represents that the auxiliary circuit is in a heavy-load state, controlling the controllable dummy load circuit to access the main circuit for output. The dummy load is dynamically connected to the main path, so that the cross adjustment rate of the multi-path flyback power supply is effectively improved when the main path is in light load and the auxiliary path is in heavy load, and the multi-path flyback power supply has low power consumption and high stability.

A radar transceiver having a transmitter including a phase shifter, comprising: a digital controller configured to provide a digital control signal indicative of a phase shift; a digital-to-analog converter configured to receive the digital control signal and provide an analog signal in accordance with the phase shift; the phase shifter configured to receive the analog signal and provide a phase-shifted output signal for transmission; a dummy load connected to receive the analog signal from the digital-to-analog converter and provide an analog output; a resistive network connected across the output of the dummy load; a test module configured to measure the analog output of the dummy load; and a controller module configured to control operation of the dummy load, the test module, and the digital controller during a self-test mode of operation by: enabling the dummy load; operating the digital controller to provide a series of digital control signals to the digital-to-analog converter; and operating the test module to measure the analog output of the dummy load to determine a linearity measurement of the digital-to-analog converter.

The invention relates to a simulation device and a using method thereof, the simulation device comprises a blade shell, a DCU board card, a function integration board and a signal input and output board, and the blade shell is provided with a containing cavity for containing cooling liquid; the DCU board card is arranged in the accommodating cavity, a first dummy load is arranged on the DCU board card, and the first dummy load is used for simulating a device generating heat in the server; the function integrated board is arranged in the accommodating cavity and comprises a control module; at least part of the signal input and output board is arranged in the containing cavity, the signal input and output board is used for supplying power to the first dummy load so that the first dummy load can generate heat and generate preset heat, and the heated and gasified cooling liquid in the containing cavity can flow out of the containing cavity and flow into the containing cavity after being liquefied; the control module is used for monitoring the real-time liquid level of the cooling liquid in the containing cavity.

A movable device and a block-type millimeter wave array antenna module thereof are disclosed. The block-type millimeter wave array antenna module includes an antenna-carrying substrate, an antenna signal transmission group, an antenna signal reception group, and a dummy load antenna group. A plurality of block-shaped carriers of the antenna-carrying substrate are divided into a plurality of first antenna-carrying blocks, a plurality of second antenna-carrying blocks, a plurality of third antenna-carrying blocks, and a plurality of fourth antenna-carrying blocks. The antenna signal transmission group includes a plurality of signal transmission antenna structures respectively carried by the plurality of first antenna-carrying blocks. The antenna signal reception group includes a plurality of signal reception antenna structures respectively carried by the plurality of second antenna-carrying blocks. The dummy load antenna group includes a plurality of first dummy load antenna structures respectively carried by the plurality of third antenna-carrying blocks and a plurality of second dummy load antenna structures respectively carried by the plurality of fourth antenna-carrying blocks. Thus, the present application can be used for wireless signal transmission and reception.

The utility model belongs to the field of direct current sources, and discloses a dummy load circuit for direct current source equipment, which comprises an output circuit, an output current sampling circuit, a dummy load control circuit and a dummy load circuit, the output circuit is connected with the output current sampling circuit, the dummy load control circuit and the dummy load circuit in sequence, and the dummy load circuit is connected with the output circuit; the output current sampling circuit is used for outputting a voltage value corresponding to a sampling current after the voltage values at the two ends of the sampling resistor are processed by an operational amplifier; and the dummy load control circuit is used for controlling connection and disconnection between the dummy load and the output end of the direct current source according to the sampling current value. According to the utility model, load discharge can be realized, no-load or light-load damage is prevented, voltage spikes are inhibited, and direct impact of extreme working conditions is avoided.

This invention provides a radio frequency (RF) output determination apparatus and a substrate processing apparatus including the apparatus, which can compensate for power loss in a high-power substrate processing apparatus. The RF output determination apparatus includes: an RF power supply; a sensor connected to the RF power supply via a first cable and a second cable; a dummy load connected to the sensor via the first cable; and an output value determination unit that determines the RF output of the RF power supply based on signal data obtained through the second cable, wherein the RF output takes into account the power loss in the first cable that is supplied to the dummy load.

The invention discloses a dummy load control circuit, a power panel and terminal equipment. The dummy load control circuit comprises an energy storage module, a voltage sampling module, a switch control module and an access control module, the energy storage module is connected to the circuit power supply end; the voltage sampling module is used for generating a first control signal when the sampling voltage is greater than or equal to a preset voltage threshold; the switch control module is used for being switched off during power-off or responding to the first control signal and generating a second control signal based on working voltage conduction during standby; and the access control module is used for responding to disconnection of the second control signal, electrically disconnecting the dummy load from the output end of the power panel, and electrically connecting the dummy load with the output end of the power panel based on connection of the energy storage voltage or the working voltage when the switch control module is disconnected. According to the invention, the dummy load is automatically switched according to the on-load of the output end of the power panel, and the access of the dummy load is maintained during power-off so as to discharge the electric energy stored by the capacitor at the output end, thereby improving the safety and reliability.

The invention discloses a dummy load design method for an LCC / S compensation type wireless charging system, and belongs to the technical field of wireless charging, and the method comprises the steps: calculating the maximum no-load output voltage of the wireless charging system; calculating the maximum safe no-load output voltage of the wireless charging system; judging whether a dummy load needs to be used or not and whether LCC compensation network parameters need to be readjusted or not; determining a dummy load resistance value meeting the maximum safe no-load output voltage to enable the rectifier bridge to work in a continuous or discontinuous state; and calculating a dummy load resistance value meeting the maximum safe no-load output voltage. The dummy load is additionally arranged at the output end of the LCC / S compensation type wireless charging system, and the parameters of the dummy load are designed, so that the problem of voltage rise during no-load operation of the wireless charging system is solved, and safe and stable operation of the system is guaranteed.

The invention provides a switching power supply and a control method thereof, and the switching power supply comprises a dummy load module which is coupled between the output end of the switching power supply and a reference ground; and the dummy load control module enables the dummy load module based on the conduction control signal of the switching power supply, and controls the dummy load module to stop working based on the turn-off control signal of the switching power supply. According to the switching power supply and the control method thereof provided by the invention, the problem that the existing switching power supply can bring audible audio noise when the switching frequency is less than or equal to the audio upper limit is solved.

The application discloses a broadcast transmitter switching device and a switching method thereof, and the switching device comprises a mechanical carrier and a control unit; the mechanical carrier comprises a cabinet body, a resistor body framework and a fan support are arranged in the lower part of the cabinet body, a first resistor body and a second resistor body are arranged on the resistor body framework, a first fan and a second fan are arranged on the fan support, a first partition plate is arranged on the upper part of the resistor body framework, an external interface plate is arranged on the first partition plate, a second partition plate is arranged in the upper part of the cabinet body, a coaxial converter is arranged on the upper part of the second partition plate, an emergency support is arranged on the lower part of the second partition plate, a front door and a back door are arranged on the cabinet body, a switch, an indicator lamp and a high-frequency power meter are arranged on the front door panel, and the external interface plate and the emergency support are arranged on the inner side of the back door. The application can be effectively applied to the switching of the broadcast transmitter, stable and efficient switching between the main machine, the standby machine, the transmitting antenna and the dummy load can be realized, the performance is stable and reliable, the market prospect is wide, and the application is convenient to popularize and use.

The utility model discloses a kind of multi-channel portable transmitter dummy load, including resistance module, heat dissipation module, test module, connector, case module, the resistance module, heat dissipation module, test module are installed in case module, resistance module, capacitor module and test module parallelly connected conversion module;Resistance module is used to absorb the electric energy of transmitter output, simulates transducer real use environment;Conversion module is connected transmitter by case module, realizes that transmitter multi-channel power amplifier output can all be switched to resistance module;Test module is used to check dummy load soundness, and monitor transmitter multi-channel power amplifier output parameter;The heat dissipation module is used to heat dissipation for resistance module.The utility model has the characteristics such as small size, light weight, convenient to carry and can be used in boat etc., improve the convenience and work efficiency of debugging test, with the advantage of continuous emission, can shorten transmitter troubleshooting time, reduce transmitter damage risk, improve equipment reliability.

The utility model discloses a testing device for a power module of a PSM short-wave broadcast transmitter. The testing device comprises a power supply unit, a voltage regulator, an on-off device, an AC contactor, a first measuring device, a second measuring device, a third measuring device and a dummy load. Corresponding interfaces of the power supply unit are respectively connected with the voltage regulator and the alternating current contactor; the voltage regulator is respectively connected with the first measuring device and a three-phase rectifier bridge in the power module to be tested through an alternating current contactor; the three-phase rectifier bridge is respectively connected with the second measuring device and the IGBT module in the power module; the IGBT module is connected with the dummy load through a third measuring device; the alternating current contactor is connected with a corresponding interface of the power supply unit through the on-off device. The working environment of the single-stage power module of the PSM short-wave broadcast transmitter can be simulated, so that off-line detection of the power module is realized, and a fault part in the power module can be quickly positioned.

A control circuit used in a switching converter. The switching converter has a switching circuit and provides an output voltage at an output terminal. The control circuit includes a switch control circuit and a dummy load control circuit. The switch control circuit receives a feedback voltage signal indicative of the output voltage and generates a switch control signal to control a switch of the switching circuit based on the feedback voltage signal. The dummy load control circuit is coupled to the switch control circuit and generates a dummy load control signal to regulate the power consumed by a dummy load coupled between the output terminal and a reference ground based on the operation of the switch control circuit.

The embodiment of the utility model discloses a low-power-consumption standby circuit, which relates to the technical field of standby control and comprises a first controller, a switch, a detection module, an integrated circuit and a load module. The integrated circuit comprises a second controller and a power supply interface; the detection module is respectively connected with the power supply interface and the first controller; the load module is respectively connected with the power supply interface and the first controller and is grounded; the switch is respectively connected with the first controller and the second controller and is grounded; the load module is connected in parallel with the detection module. The mode that the first controller is driven by high voltage and low current in a high frequency mode is adopted, energy consumption of the whole circuit is reduced, meanwhile, voltage at the rear end is lowered in a dummy load mode during standby, and the effect of effectively reducing power consumption of the whole power system during standby is achieved.

The utility model discloses a preposed radio frequency signal switching device of an electric motor coaxial change-over switch, which relates to the technical field of radio frequency signal switching and specifically comprises a radio frequency U-shaped connector, a switching panel, an electric motor coaxial change-over switch and an HMI (human machine interface) control panel, the electric motor coaxial change-over switch is mounted on a front panel of the switching panel, and the electric motor coaxial change-over switch is mounted on a rear panel of the switching panel. A radio frequency U-shaped connector is installed below a front panel of the switching panel, the radio frequency U-shaped connector and the electric motor coaxial change-over switch are located on the same side of the switching panel, and the interface distance of the electric motor coaxial change-over switch is equal to the port distance of the radio frequency U-shaped connector. And an interface of the electric motor coaxial change-over switch is connected with the transmitter, the dummy load and the antenna feeder respectively. According to the utility model, manual or electric switching among the main and standby transmitters, the dummy load and the antenna feeder is realized, and when the electric switching fails, the normal operation of the system can be ensured through manual switching.

A switching converter, a control circuit and a control method thereof are disclosed. The switching converter includes a power switching circuit having a power switch, and converts an input voltage signal into an output voltage signal by turning on and off the power switch. The control circuit includes a switch control circuit and a dummy load control circuit. The switch control circuit receives a feedback voltage signal representing the output voltage signal, and generates a switch control signal based on the feedback voltage signal to control the operation of the power switching circuit. The dummy load control circuit is coupled to the switch control circuit, and generates a dummy load control signal based on the operation of the switch control circuit to adjust a power value consumed by a dummy load coupled between an output terminal of the switching converter and a reference ground.

The application relates to an intermediate frequency power source arbitrary phase power slicing method and device, and relates to the field of advanced semiconductor manufacturing. The application comprises the following: an intermediate frequency power source; a real load for receiving power for process treatment; a dummy load for maintaining impedance matching of an output end of the intermediate frequency power source when the real load is disconnected; a complementary switch group comprising a first switch unit and a second switch unit, the first switch unit and the second switch unit being configured to be complementary and to be prohibited from being turned on at the same time; and a control unit connected with the complementary switch group, used for controlling switching timing of the complementary switch group according to a target phase interval, so as to realize sub-cycle level power slicing output. The application realizes arbitrary phase slicing by using a zero-crossing point as a phase reference and by using delay control, and can accurately cut sub-cycle waveforms in a single sine waveform, the control precision is improved from cycle level to microsecond level, and it is ensured that the load is always connected.

1. Name of the product in this design: Transmitter Dummy Load (Multi-channel Portable). 2. Purpose of this design: To enable the testing and maintenance of multi-channel transmitters. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. The rear view of Design 1 is symmetrical to the front view of Design 1, so the rear view of Design 1 is omitted; the rear view of Design 2 is symmetrical to the front view of Design 2, so the rear view of Design 2 is omitted; the rear view of Design 3 is symmetrical to the front view of Design 3, so the rear view of Design 3 is omitted. 6. Design 1 is designated as the basic design.

The invention discloses a control method and device of a magnetic suspension system, the magnetic suspension system, a storage medium and a computer program product. The method comprises the steps that before a magnetic suspension compressor is started, a multiplexer is connected with a dummy load, a drive circuit outputs detection current, and a corresponding voltage signal is collected to conduct static performance detection on a current sensor; after the bearing coil is qualified, the multiplexer is switched to the bearing coil, the driving circuit outputs detection current, and corresponding voltage signals are collected to carry out validity detection on the bearing coil; after the rotor is qualified, the magnetic suspension compressor is started, the position of the rotor is collected, a driving signal is generated, and a driving circuit outputs current and collects a corresponding voltage signal so as to dynamically detect a current sensor and a bearing coil; and if any detection is abnormal, closing the magnetic suspension compressor. According to the scheme, the system interference elimination capability and the full-interval detection coverage are improved, the fault identification timeliness is improved, and the service life of equipment is guaranteed.

The utility model discloses a radio frequency signal switching device comprising a switching panel, which relates to the technical field of radio frequency signal switching and specifically comprises the switching panel, four identical radio frequency U-shaped connectors, an electric motor coaxial change-over switch, an HMI (human machine interface) control panel and a quick release and locking device. The four same radio frequency U-shaped connectors are arranged on the same plane of the front panel of the switching panel; the electric motor coaxial change-over switch is arranged behind the change-over panel, and four interfaces of the electric motor coaxial change-over switch are respectively connected with outer ports W of the four radio frequency U-shaped connectors; and inner ports N of the four radio frequency U-shaped connectors are respectively connected with the main transmitter Tx1, the standby transmitter Tx2, the dummy load Load and the antenna feeder. According to the invention, manual or electric switching among the main and standby transmitters, the dummy load and the antenna feeder is realized, and when the electric switching fails, the normal operation of the system can be ensured through manual switching.

The invention provides a device and method for testing high-frequency control performance during joint debugging of a cyclotron, and the device comprises a low-level control system, a solid-state power source, a directional coupler, a high-frequency resonant cavity, a power amplifier, and a dummy load which is disposed between the directional coupler and the high-frequency resonant cavity and is used for simulating a high-power resistor. Temperature probes are respectively arranged in the dummy load and the high-frequency resonant cavity; the method comprises the following steps: building a test platform; electrifying the test platform; the dummy load transmits heat to the high-frequency resonant cavity, so that the resonant frequency of the cavity is shifted; the temperature transmitter sends the offset electric signal to the low-level control system; the system detects the resonant frequency change caused by temperature rise in real time, controls the on-off of the temperature rise change of the dummy load through the solid-state power source and the directional coupler, and carries out high-frequency cavity tuning. Through the design that the dummy load generates heat and the cavity senses heat, a universal performance test and verification scheme is provided for high-frequency low-level control systems of various particle accelerators.

The utility model discloses a switching matrix based on multi-port coaxial switches, which comprises a coaxial switch matrix and a controller, and is characterized in that the coaxial switch matrix comprises a plurality of coaxial switches, a plurality of output antennas, a plurality of power sources, a dummy load, a duplexer and a multipath power combiner; the coaxial switches are used for connecting all the components, each coaxial switch comprises nine ports, the ports in each coaxial switch can be randomly connected through switching of the coaxial switches, and the power source can be output from any output antenna or dummy load through the coaxial switches. The duplexer is used for receiving two different-frequency power sources and outputting the two different-frequency power sources to any output antenna or dummy load; the multi-path power combiner is used for receiving and combining a plurality of same-frequency power sources and outputting the same-frequency power sources to a specific output antenna or dummy load; and the controller is used for controlling the coaxial switch to switch.

The invention belongs to the technical field of isolation power supplies, and discloses a self-oscillation isolation power supply circuit and method, and the circuit comprises an input power supply, a self-oscillation unit, a rectification filtering unit, and a voltage stabilization unit. The magnetic saturation characteristic of the magnetic core transformer is utilized to form self-oscillation so as to generate an alternating signal, direct current is output after the alternating signal is rectified and filtered by the secondary side, and meanwhile, a dynamic dummy load is provided through the voltage stabilizing unit. The structure directly utilizes the transformer to realize isolation and energy transfer, does not need a complex control circuit, remarkably simplifies the overall architecture and improves the integration level; disturbance of load change to output voltage is effectively suppressed through a dummy load compensation mechanism, and the power supply stability of downstream elements is guaranteed; and meanwhile, due to the power self-limiting characteristic of the magnetic saturation mechanism, enough power output can be realized within a safe range without an external power amplification circuit, and the complexity and the cost of the system are reduced.

The application relates to the technical field of switching power supplies, in particular to a switching power supply with an active dummy load and a dummy load control method thereof, wherein the input end of a boost module and the output end of a dimming output module are electrically connected, the output end of the boost module is electrically connected with the positive electrode of an output capacitor of a PFC module through a linear voltage stabilizing module; a controller is electrically connected with the input end of the boost module through an input detection module to obtain an input voltage; the controller is electrically connected with the output end of the boost module through an output detection module to obtain an output voltage; the boost module is provided with an active switch which is electrically connected with the controller to be controlled; the controller is preset with a consumed current, the controller calculates the on time and the off time of the active switch to form a PWM signal to control the active switch to work; the problem that a resistor type dummy load cannot constantly consume a preset current value under the condition that the output voltage changes and finally cannot realize lower dimming is solved.

The application relates to a starting circuit and a control method thereof. The circuit comprises a power supply circuit for outputting a power supply voltage; a power supply control circuit electrically connected with the power supply circuit; a power supply conversion circuit receiving the power supply voltage and outputting a first output voltage and a second output voltage through a first secondary winding and a second secondary winding respectively; an intelligent control module receiving the second output voltage and outputting a judgment signal according to an instruction signal; a dummy load electrically connected with the first secondary winding; a dummy load control circuit electrically connected with the dummy load, the dummy load control circuit receiving the judgment signal to control the on-off of the dummy load; and a voltage negative feedback circuit detecting the first output voltage and feeding back to the power supply control circuit to control the first output voltage and the second output voltage. The on-off of the dummy load is controlled by the dummy load control circuit, and the first output voltage is detected by the voltage negative feedback circuit for feedback, so that the purpose of standby low power consumption and fast starting is achieved.