35results about How to "Output power adjustment" patented technology

The invention relates to an induction cooker control circuit suitable for cookers of different materials. The induction cooker control circuit comprises an IGBT (Insulated Gate Bipolar Translator), an IGBT driving module, an LC (Launch Control) resonance circuit, a central processing unit, a synchronous sampling circuit and a sampling circuit, wherein the LC resonance circuit is connected with the IGBT, and the central processing unit is connected with the IGBT driving module; the synchronous sampling circuit is electrically connected with the LC resonance circuit; and the sampling circuit is connected with the central processing unit and provides current and voltage signals. The control circuit also comprises a resonance frequency sampling circuit which is used for sampling a resonance frequency generated when the cookers of different materials work. The sampling point of the resonance frequency sampling circuit is arranged at the output end of the synchronous sampling circuit, and the output end of the resonance frequency sampling circuit is connected with the central processing unit. The output power and a power preset value are compared and the collected resonance frequency and a resonance frequency preset value are compared to judge whether the resonance frequency is beyond the resonance frequency range of safe working of an induction cooker or not. The output power of an electromagnetic coil is adjusted through the IGBT, so that a main loop working current works in a rated range, and therefore the safe working of the induction cooker is protected.

The invention discloses a photosensitive LED lamp. The photosensitive LED lamp comprises a power supply unit, an MCU (micro controller unit), a photosensitive sensor, a power adjustment unit and an LED lamp body, wherein power supply input ends of the MCU, the photosensitive sensor and the power adjustment unit are electrically connected with the power supply unit respectively; an output end of the photosensitive sensor and a control input end of the power adjustment unit are electrically connected with the MCU respectively; an output end of the power adjustment unit is electrically connected with the LED lamp body. The output brightness of the photosensitive LED lamp is adjustable, and the photosensitive LED lamp is energy-saving and environment-friendly.

The invention provides a primary frequency modulation control method and a related device. The method comprises the steps: obtaining the target power of primary frequency modulation of a current control period and the target power variation of the target power relative to the target power of a previous control period during the primary frequency modulation; and when the target power variation is not a preset threshold value and the working state of an energy storage system corresponding to the target power variationis available, preferentially adjusting the charging and discharging power of the energy storage system, and when the working state of the energy storage system corresponding to the target power variation is unavailable, preferentially adjusting the power generation power of the new energy power generation system. According to the invention, the energy storage system is introduced to carry out primary frequency modulation control, so that when the power generation frequency of the new energy power generation system deviates from the target frequency far, the output power of the power system is rapidly stabilized at the target power by utilizing the cooperation of the charging and discharging control of the energy storage system and the power generation control of the new energy power generation system so as to ensure the working efficiency and the working stability of the power system.

The invention discloses a main generator excitation current variable-level control circuit adopted when locomotive microcomputer excitation control fails. The control circuit comprises a locomotive microcomputer, a locomotive power system, a driver controller, a traction control circuit, a main generator microcomputer excitation loop and a main generator fault excitation loop. The driver controller is provided with a first traction gear, a second traction gear, a third traction gear, a fourth traction gear, a fifth traction gear, a sixth traction gear, a seventh traction gear and an eighth traction gear. A first contactor, a second contactor, a third contactor and a fourth contactor are connected to the traction control circuit. A locomotive fault excitation resistor R1, a locomotive fault excitation resistor R2, a locomotive fault excitation resistor R3 and a locomotive fault excitation resistor R4 are connected to the main generator fault excitation loop. A normally-open contact K1 of the first contactor, a normally-closed contact L4 of the fourth contactor and the locomotive fault excitation resistor R1 are sequentially connected in series and then connected with the locomotive power system. A normally-open contact K2 of the second contactor, a normally-open contactor K3 of the third contactor and a normally-open contact K4 of the fourth contactor are correspondingly connected with the locomotive fault excitation resistor R2, the locomotive fault excitation resistor R3 and the locomotive fault excitation resistor R4 in series respectively and then connected to the locomotive power system, the output power of a locomotive main generator can be adjusted under the fault excitation working condition, the traction power of a locomotive axle is maximal, and the traction capacity of a locomotive is greatly improved.

The invention discloses a control circuit of a high-efficient induction heating quenching machine tool. The control circuit comprises an induction heater and a control circuit, and is characterized in that the control circuit comprises a three-phase alternating current bridge type rectifier circuit module, a power synthesis circuit module and an LC (inductor-capacitor) oscillation circuit module, wherein the power synthesis circuit module is used for performing power synthesis and then outputting to the LC oscillation circuit module; and in the LC oscillation circuit module, a primary coil L of a high-frequency quenching transformer is connected with an oscillation capacitor C to form a parallel resonance circuit, and a secondary level of the high-frequency quenching transformer is connected with the induction heater. Due to the adoption of the structure, the efficiency of the whole machine is high, and units of the power module comprise a transistor and other auxiliary semiconductor devices, so that the structure is compact, the self-loss is small, and the efficiency of the whole machine can achieve above 85%; and the output power is convenient to adjust, the reaction speed is high, the control is accurate, and the heating conditions can be selected arbitrarily. The control device disclosed by the invention further has the characteristics of simple structure, convenience in maintenance, safety and reliability.

The invention discloses portable energy storage equipment with a heat dissipation wind tunnel structure. The portable energy storage equipment comprises an equipment body. A handle is fixedly installed at the top of the equipment body. A first ventilation opening and a second ventilation opening are formed in the two sides of the equipment body respectively. One side of the interior of the equipment body is provided with a first air channel, and the other side of the interior of the equipment body is provided with a second air channel. A first heat dissipation fan, a first retardation plate and a second retardation plate are sequentially arranged on the inner side of the first air channel from left to right. A ventilation cavity is formed in the center of the inner side of the equipment body, the first air channel is communicated with the second air channel through the ventilation cavity, and refrigeration sheets are fixedly installed at the top of the inner side and the bottom of theinner side of the ventilation cavity. A third retardation plate, a fourth retardation plate and a second heat dissipation fan are sequentially arranged on the inner side of the second air channel fromleft to right. According to the portable energy storage equipment, heat generated in the equipment body is taken away through low-speed airflow by arranging the heat dissipation wind tunnel, so thatrapid heat dissipation is achieved; and noise generated by heat dissipation is eliminated, so that the service life of the heat dissipation fans is prolonged.