8 results about "Sine wave" patented technology

When an operating state constituted of a rotation speed Ne and torque Te of an engine belongs in a resonance region in a post-stage including a damper connected to a crankshaft of the engine, a subtraction sine wave for removing an influence by resonance is calculated, and misfire is judged depending on whether or not a variation amount ΔF of a rotation speed F after processing, obtained by subtracting the calculated subtraction sine wave from a variation in 30-degree rotation speed N30 which is a rotation speed every time the crankshaft rotates by 30 degrees, is less than a threshold value Fref. Thereby, even when the operating state belongs in the resonance region, misfire can be judged more reliably and more accurately.

The invention discloses an automobile electronic oil pump driving system and relates to the field of automobile driving. The automobile electronic oil pump driving system comprises an oil pump, a brushless motor, a controller and a controller upper cover, the brushless motor comprises a motor core, a motor shell and a motor rear end cover, and the oil pump is installed at the output end of the brushless motor. The controller comprises a power supply, a power supply control module, an MCU module, a communication module, a pre-driving and driving module, an angle position sensor and a motor driving chip with a position estimation function; the controller switches an inductive mode in real time in a low-temperature cold start environment to acquire angle position data through the angle position sensor, and controls the rotating speed of the motor by adopting an inductive sine wave algorithm; a non-inductive mode is switched in real time in a position sensor failure environment, counter electromotive force of the brushless motor is collected through a motor driving chip with a position estimation function, and through cooperation with a position estimation algorithm of control software, the angle position of the motor is estimated, and control over the rotating speed of the motor is achieved.

The invention discloses a multiphase set digital sine wave generator which comprises a clock delay module, a plurality of counting sequence generators, a multiphase register, a sine wave meter reading module and a plurality of data gating modules. Different clock signals generated by the clock delay module are utilized to control the multiphase register and the data gating modules to carry out data collection or screening, the effect of outputting multiple different sine wave signals is achieved, the sine wave generator serves as an integrated device, the functions of multiple original independent signal generators are completed, moreover, the phase difference between different sine wave signals can be stably maintained, the number of used devices is greatly reduced, and the integration level of the devices is improved. Correspondingly, the invention also discloses an integrated circuit with the same beneficial effects.

According to the power supply control system provided by the invention, an internal electronic switch is switched off to control a zero line time-sharing generator to be directly switched on, and a zero line is switched on to a zero line end of an intelligent switch through the zero line time-sharing generator so as to supply power to a zero line and a live line of the intelligent switch; the internal electronic switch controls the live wire time-sharing conduction device to be conducted in a closed-loop mode so as to supply power to load equipment in a time-sharing mode, and the zero line time-sharing generator can be automatically cut off when detecting that the live wire time-sharing conduction device is conducted according to the set corresponding time of one-time or multi-time cut-off at the zero crossing point of the sine wave of the alternating current. And when the null line time-sharing generator detects that the live wire time-sharing conduction device is cut off, the null line is automatically conducted to supply power to the intelligent switch in a time-sharing manner, so that null and live wire power supply of the intelligent switch is realized. The invention provides a power supply control method. According to the technical scheme, zero and live wire power supply of the intelligent switch is achieved under the condition that the switch bottom box is not provided with a zero wire, installation is easy, and the application range is wide.

The invention provides a multi-period sectional power-on circuit adopting a secondary output section, primary AC Part, transformer T1, the secondary output portion and the AC portion are isolated fromeach other by a transformer T1 and an optocoupler, the primary AC portion includes an input rectifier module, PFC module, switch K1, power switch conversion module, control unit U1, capacitive filtermodule, phase detection module, capacitive circuit level detection module, the secondary output section includes a rectifying and filtering module, The structure of the secondary detection and control module solves the technical problem in the prior art that the current of the first 0.5 sine wave cycle after the one-time access is turned on is large, and realizes the technical effect that the effect on circuit efficiency is small, the related shock is mainly distributed to a plurality of quarter sine waves, and the impact on the related original parts and equipment is smaller.