40results about How to "Good EMI effect" patented technology

An electrical connector (100) includes an insulative housing (1), a number of contact terminals (2), a metal plate (3), and a metallic shell (4) enclosing the insulative housing (1). The terminals and the metal plate (3) are retained in the insulative housing (1). The insulative housing (1) includes a base portion (11) and a tongue portion (12) extending forward from the base portion (11). The contact terminal includes a contacting portion (21), a tail (22), and a connecting portion (23) connecting the contacting portion (21) and the tail (22). The tails (22) are positioned out of the insulative housing (1). The metal plate (3) has a number of positioning end portions (33). The positioning end portions (33) are soldered on a printed circuit board for grounding. The electrical connector (100) has improved electromagnetic interference effect.

The embodiments of the present invention disclose an EMI common-mode inductor of a new winding method and a winding method for the EMI common-mode inductor, relating to the technical field of common-mode inductors. The EMI common-mode inductor of the new winding method comprises a toroidal magnetic core, and wound at symmetric positions on two sides of the toroidal magnetic core, two windings and four lead ends. Each winding is a multi-segment winding, and multiple layers are wound around each segment of a winding. Two lead ends of each winding are disposed at two ends of the winding respectively, and one of the lead ends is positioned at the innermost layer of the winding and the other lead end is positioned at the outermost layer of the winding. The embodiments of the present invention can ensure EMI effect, realize automatic winding, effectively improve production efficiency, greatly save labor, lower reject ratio, reduce product cost, and achieve win-win between a client and a supplier.

Disclosed is a loading and unloading device for a long handle module, comprising a housing (100), a pull ring (200), tension springs (310, 320), a brake disc (400) and a cover plate (500). The housing (100) comprises a first cavity (116), a second cavity (102) and a U-shaped beam (115), the U-shaped beam (115) separating the first cavity (116) from the second cavity (102). The brake disc (400) comprises a base body (412), a first U-shaped groove (409), a second U-shaped groove (410), a bend structure (403) and a third inclined surface (401). The first U-shaped groove (409), the second U-shaped groove (410) and the bend structure (403) are provided on the base body (412), and the third inclined surface (401) is provided on the bending structure (403). The pull ring (200) comprises a handle (210), a pressing rod (201) and a pressing head (202), and the pressing head (202) is arranged on the pressing rod (201). The cover plate (500) includes a pressing tongue (506). The brake disc (400) in the device tilts downwards to pry the tongue (701) of a shielding cage (700) from a lock catch (101) of the housing (100) to unload the module, thereby solving the following problems: the direct-pulling type loading and unloading mechanism for modules in the prior art has high requirements on the wall thickness of the housing (100), a relief structure designed for the housing (100) influences the EMI performance, and the structure of the loading and unloading mechanism has poor reliability, narrow application range, and installation complicity.

The invention discloses a control method and device of a switch tube and an air conditioner. When the control method is used, a frequency of an input power supply of a power factor correction (PFC) circuit is periodically acquired, a switch frequency of a power switch tube is set, an output duty ratio of the power switch tube is calculated according to an AC voltage value an AC current value, which are acquired, of the input power supply of the PFC circuit and an acquired DC bus voltage value, and the power switch tube is driven to be periodically switched off or switched on according to the switch frequency and the output duty ratio. By the control method, the switch-on and the switch-off of the power switch tube can be controlled according to different frequencies of the input power supply, the power factor of the PFC circuit is increased, so that the optimal electro magnetic interference (EMI) effect is achieved.

The invention discloses a novel circular-ring-shaped high-power electric reactor. The electric reactor comprises a magnetic core and a coil. The magnetic core is a circular-ring-shaped magnetic core formed by two identical semicircular-ring-shaped magnetic core bodies in a combined mode, the diameter of the circular-ring-shaped magnetic core ranges from 7 inches-20 inches, and the magnet density of the circular-ring-shaped magnetic core ranges from 5.5 g / cm<3> to 6.2 g / cm<3>. The two semicircular-ring-shaped magnetic core bodies are sleeved with the coil which is a spiral varnished wire coil formed by a flat wire in a vertical winding mode. The semicircular-ring-shaped magnetic core bodies are formed by pouring a magnetic composite material composed of ferromagnetic powder and high-temperature resin adhesive through a semicircular-ring-shaped mould. The electric reactor is simple in structure, low in production cost, light in weight, low in noise, low in loss, good in surface heat dissipation and long in service life; the process is simple, and automatic operation is easy to achieve; the utilization rate of the magnetic core is high, magnetic leakage is small, and the EMI effect is good.

Disclosed is a dynamic regulation power controller having a work voltage input pin, a feedback voltage input pin, a driving voltage output pin, a current sensing input pin, and a regulation power input pin, and being in collocation with a switching unit, an input power processing unit, a transformer, a current sensing resistor, a power regulation unit, an output rectification unit, and an output capacitor for converting an input AC voltage into an output voltage for supplying a load. In particular, the driving voltage and the driving current are dynamically adjusted according to the feedback voltage and the current sensing signal, thereby greatly increasing efficiency of power conversion and Electromagnetic Interference (EMI).