34results about How to "Duty cycle regulation" patented technology

The present invention provides a photovoltaic solar energy system, a control method thereof, and a computer-readable storage medium. The method includes acquiring the output power and sampling current of the current sampling period and the previous sampling period, and obtaining the output power and sampling current of the current sampling period and the previous sampling period according to the output of the current sampling period and the previous sampling period. Power and sampling current determine whether the working environment is a multi-power extreme value environment; if it is confirmed that the current working environment is a multi-power extreme value environment, change the duty cycle of the pulse modulation signal by the preset first step length, and calculate each The output power corresponding to the duty cycle is searched for the target duty cycle of the pulse modulation signal corresponding to the maximum output power, and the duty cycle of the pulse modulation signal output by the DC converter is adjusted to the target duty cycle. The present invention also provides a photovoltaic solar energy system and a computer-readable storage medium implementing the above method. The invention can quickly find the duty ratio corresponding to the pulse modulation signal corresponding to the maximum output power, and can reduce the production cost of the photovoltaic solar energy system.

The invention discloses a duty ratio adjusting circuit and an implementation method thereof. The duty ratio adjusting circuit comprises a DC bias voltage adjusting circuit used for converting a digitalized input clock signal CLK _ in into a DC bias voltage controlled clock; a phase inverter used for converting the DC bias voltage controlled clock into a digitalized clock signal CLK _ out; a control voltage generation circuit used for generating a control voltage under the control of high and low levels of the output clock signal CLK _ out, wherein the control voltage is connected to the DC bias voltage adjusting circuit to adjust the DC bias voltage of the DC bias voltage controlled clock output by the DC bias voltage adjusting circuit. By adoption of the duty ratio adjusting circuit, the duty ratio adjusting circuit capable of adjusting the duty ratio of signals to 50% is realized.

The present invention relates to the technical field of servo motor control, in particular to a servo motor voltage control method, comprising the following steps: S1: collecting the current working voltage of the servo motor through a controller; when the collected working voltage is within a set range, Repeat step S1, and when the collected operating voltage exceeds the set range, execute step S2; S2: Use a phase-shifted full-bridge circuit to adjust the input voltage of the servo motor, and repeat step S1 after each adjustment is completed; The controller keeps the preset duration of each power-on of the transformer in the phase-shifted full-bridge circuit unchanged, and realizes the adjustment of the duty cycle of the preset duration when the transformer is powered on by changing the frequency of the control signal of the phase-shifted full-bridge circuit, so as to realize the work voltage regulation. The invention can timely and effectively control the whole working process of the servo motor, adopts the frequency conversion control method, improves the stability of the output voltage, and prolongs the service life of the motor.

The invention provides a self-excitation-reinforcing high-voltage conversion system of a switch reluctance generator. The system is composed of three conversion branches and an isolation and voltage-down DC / DC converter. The input ends of the three conversion branches are connected in parallel, the output ends of the three conversion branches are connected in series, thus, higher voltage output isobtained, excitation reinforced parts are distributed in all the conversion branches where all phases of windings are located respectively, independent excitation power sources are omitted, the system reliability is improved, and the advantages of a switch reluctance motor are effectively utilized. As input end voltages are far lower than output end series total voltages, voltage withstanding ofinternal devices is low, meanwhile, the switching frequency of all switching tubes is within a low-and-medium frequency range, and losses are low. The system is very suitable for converters of all switch reluctance generators, and especially is oriented to high-voltage loads or grid-connection requirements.

The invention discloses a noise control method and system for an electromagnetic valve and an air conditioner, relates to the field of noise reduction control of air conditioner electromagnetic valves and aim at solving the problem that when a current air conditioner switch component is switched off or switched on, great noise is generated, and use of a user is affected. The critical voltage duty ratio of the electromagnetic force in the electromagnetic valve is detected when the balance state of a metal bolt is maintained; whether a switch controller sends switching-off or switching-on signals to the electromagnetic valve or not is detected; and the duty ratio of the control signals in the switching-off or switching-on process of the electromagnetic valve is adjusted in a segmented manner according to the critical voltage duty ratio. According to the noise control method and system for the electromagnetic valve and the air conditioner, the duty ratio of the control signals is adjusted in the switching-on and switching-off processes of the electromagnetic valve so that the jumping changing type of currents in an electromagnetic valve coil is transformed into a gradually and gently changing type, and therefore the electromagnetic force can be gently changed, impulsion is reduced, and the sounds generated by collisions are effectively lowered.