4 results about "Resistive capacitive" patented technology

The invention relates to the field of air conditioner diagnosis, in particular to a multi-protocol air conditioner diagnosis circuit. Comprising a main control chip, a Bluetooth module circuit, a power supply module circuit, a multi-protocol switching circuit, a home bus circuit and an I2C interface circuit, wherein the multi-protocol switching circuit comprises an interface circuit, a multi-way switch circuit and a change-over switch circuit; the home bus circuit comprises an optical isolation input circuit, a home bus chip circuit and a resistance-capacitance adaptive circuit; the I2C interface circuit is connected with the multi-way switch circuit; the power supply module circuit is connected with the main control chip; and the Bluetooth module circuit is connected with the main control chip. The method is high in compatibility, can diagnose air conditioners of most brands and models, is high in fault recognition accuracy, and improves the maintenance efficiency of the air conditioners. The circuit has a certain anti-interference capability. The air conditioner maintenance device has multiple connection modes such as wired connection and wireless connection, can be connected with multiple host devices such as a mobile phone and a computer, realizes long-distance air conditioner maintenance, and improves the working safety.

Solid-state circuit breakers (SSCBs) have been witnessing an impressive progress with the aid of wide bandgap (WBG) devices such as silicon carbide (SiC) MOSFETs. Along with obtaining high efficiency as the result of low on-state resistance, response times have been gaining remarkable achievements in microseconds range. Not only that, the reported successes in control and gate drivers design and incorporating fault detection / location techniques in SSCBs are promising. A MOV-resistive capacitive switch (MOV-RCS) snubber for solid state circuit breakers addresses the following: 1) the MOV degradation issue in DCCBs is solved, 2) the maximum allowable DC bus voltage on DCCBs is extended. The solid state circuit breaker and an active clamping snubber includes a first circuit including a fault current bypass based solid state breaker for low voltage direct current systems.

This invention relates to the field of power system insulation monitoring technology and discloses a method for identifying and monitoring resistive and capacitive residual current in electrical equipment. The method includes: synchronously acquiring a bus voltage reference signal and a total residual current signal; extracting the zero-crossing moment of the lockout voltage using the fundamental component; dividing the time-series orthogonal intervals and calculating the piecewise charge integral; comparing the integral differences between the positive and negative half-wave mirror symmetrical positions to determine the phase shift angle caused by the nonlinearity of the measurement link; shifting the integral boundary accordingly to maintain the physical phase orthogonality; and, based on the intrinsic independence of resistive and capacitive components, using a covariance optimization mechanism to remove projection interference and output resistive residual current data. This invention utilizes waveform symmetry to self-calibrate the sensor's dynamic phase shift, eliminating the projection penetration of capacitive components onto the resistive observation axis, ensuring that the identified data corresponds to the true physical loss properties of the insulation medium, and improving the accuracy of insulation degradation trend assessment.

The application discloses a micro substrate integrated waveguide filter with in-band ripple suppression, a wide-stop-band band-pass filter adopts a single-cavity substrate integrated waveguide structure, four novel complementary open-loop resonant rings with the same shape are etched on the upper layer metal of the resonant cavity and are recorded as wide-stop-band resonant rings, a capacitive slot line is etched on the middle position of the upper layer metal along the longitudinal direction and is recorded as a wide-stop-band capacitive slot line, and the lower layer metal is etched to form a defect ground; a dual-band band-pass filter adopts a single-cavity substrate integrated waveguide structure, four novel complementary open-loop resonant rings are etched on the upper layer metal of the resonant cavity, the four open-loop resonant rings are divided into two groups according to the size and are recorded as large resonant rings and small resonant rings, a capacitive slot line is etched on the middle position of the upper layer metal along the longitudinal direction and is recorded as a dual-band capacitive slot line, a grid-shaped slot line is etched along the transverse direction, a symmetrical slot microstrip line is etched at the tapered interface of the upper layer metal, a metal counterbore is arranged in the resonant cavity, and a slow-wave substrate integrated waveguide structure is formed by connecting a circuit ground plane.