4results about How to "Control output power" patented technology

This application provides a power distribution method and apparatus for a fuel cell hybrid power system. At the start time of the i-th maintenance duration, the i-th initial target power of the fuel cell is obtained. The i-th initial target power is determined based on the vehicle's total power demand before the start time and the first charge state of the high-voltage battery before the start time. If the absolute value of the difference between the i-th initial target power and the historical target power within the (i-1)-th maintenance duration is greater than or equal to the power step size, then the i-th actual target power of the fuel cell is determined based on the historical target power within the (i-1)-th maintenance duration and the power step size. If the absolute value of the difference between the i-th initial target power and the historical target power within the (i-1)-th maintenance duration is less than the power step size, the historical target power within the (i-1)-th maintenance duration is determined as the i-th actual target power of the fuel cell. Controlling the stepwise change of the actual target power can match the power consumption response rate of the fuel cell.

The utility model relates to a chip temperature test experimental platform device, which comprises a machine body, and the machine body is provided with a test chamber, a pre-temperature chamber and an adjusting chamber which are separated by partition structures. The test chamber is used for testing the temperature of the chip; the pre-heating chamber is used for pre-cooling the chip when the chip is subjected to a low-temperature test; the adjusting cavity communicates with the exterior of the machine body through an exhaust fan, and the exhaust fan is an exhaust fan with the adjustable rotating speed. The testing chamber is communicated with the pre-warming chamber, the pre-warming chamber is communicated with the adjusting chamber, the testing chamber is provided with a first cold air inlet, and the pre-warming chamber is provided with a second cold air inlet. According to the technical scheme of the utility model, air flow can be accelerated by starting the exhaust fan, low-dew-point dry air is continuously input into the test chamber and the pre-heating chamber along with the first cold air inlet and the second cold air inlet, and the dew points in the test chamber and the pre-heating chamber can be rapidly reduced so as to reach the required dew point; therefore, the efficiency of reducing the dew points in the test chamber and the preheating chamber can be improved.

This application relates to a control method for parallel operation of an energy storage converter and a generator set to withstand impact loads. The method includes: establishing a control framework for the energy storage converter based on the circuit topology of the energy storage converter and a rotating coordinate system DQ-axis voltage-current control method; connecting a voltage and frequency error droop loop in parallel to the current setpoint of the phase-locked loop current-source inverter within the energy storage converter control framework; and controlling the operation of the energy storage converter after the current loop using an SVPWM modulation strategy. This application achieves stable operation of the energy storage converter and the system, ensuring that when the system starts up with wind turbine-type impact loads, the converter participates in the stable control of the AC bus, dynamically and evenly distributes the impact current, enabling smooth load startup and operation; and dynamically adjusts the power of the energy storage converter in steady state, allowing the diesel generator set to operate at economical power.

The application discloses a kind of radio frequency signal source output power control method, the method includes: the output power range of standard radio frequency signal source and the numerical control attenuation range of numerical control attenuator are divided to obtain multiple control regions, the boundary point of each control region corresponds an output power, a frequency and a numerical control attenuation quantity;Each control region is constructed standard corresponding relationship based on the numerical control attenuation quantity corresponding to the voltage control attenuator;Based on the standard corresponding relationship, target frequency and target power, control the radio frequency signal source to be controlled, can accurately control the power required by radio frequency signal source output, avoid the larger error of output power.