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43results about How to "Reduce size and cost" patented technology

Reading circuit of uncooled infrared focal plane array

InactiveCN104251740AReduce size and costImprove Uniformity and Reliability
The embodiment of the invention discloses a reading circuit of an uncooled infrared focal plane array. The reading circuit of the uncooled infrared focal plane array comprises a current bias circuit, a substrate temperature compensating circuit and an integrating circuit, wherein the current bias circuit comprises a reference bias current source structure IBIAS, a channel-level thermal short circuit microbolometer RB and a pixel-level thermal insulation microbolometer RS, wherein the channel-level thermal short circuit microbolometer RB and the pixel-level thermal insulation microbolometer RS are same in current bias; the substrate temperature compensating circuit comprises a transconductance amplifier OTA; the input end of the transconductance amplifier OTA is connected onto the channel-level thermal short circuit microbolometer RB and the pixel-level thermal insulation microbolometer RS to generate voltage; the input end of the integrating circuit is connected to the output end of the transconductance amplifier OTA, and the integrating circuit is used for performing integration on the output current of the transconductance amplifier OTA to obtain output voltage VOUT. According to the reading circuit disclosed by the embodiment of the invention, the channel-level transconductance amplifier is additionally arranged in the reading circuit, so that the substrate temperature compensation is realized; a TEC (thermo-electric cooler) is removed, so that the size and the cost of packaging are greatly reduced, and meanwhile, the uniformity and the reliability of the whole circuit are greatly improved.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Current balancing circuit with multi-path output

The invention relates to a current balancing circuit with multi-path output, wherein a first flow equalizing element is used for carrying out flow equalization to two corresponding rectification circuits of a same auxiliary side winding, and a second flow equalizing element is used for carrying out flow equalization to current between different auxiliary side windings so as to realize output current balancing among multiple rectification circuits, and simultaneously, additional active devices and control are not needed. The current balancing circuit is applicable to the condition that an auxiliary side has multiple windings, and the current balance among multiple paths of output is realized by the characteristics of the flow equalizing elements. Even in application occasions with high power, low voltage resistant rectifying diodes and filter capacitors can meet the requirement, therefore, the conversion efficiency of the whole system is improved, volume and cost are saved due to the adoption of the filter capacitor with small capacity, and simultaneously, the circuit is simple in structure and easy to realize. The current balancing circuit is suitable for power supply occasions needing multiple equal current outputs and is especially applicable to LED (light-emitting diode) drivers with multiple paths of output.
Owner:SILERGY SEMICON TECH (HANGZHOU) CO LTD

Online replacement control device and method for power module of power electronic transformer system

The invention provides an online replacement control device and method for a power module of a power electronic transformer system, and the device is characterized in that a first bypass switch is connected to an AC input end in parallel; a first auxiliary power supply is used for taking power from the DC side of the first AC/DC unit; a first control module is used for controlling the first bypassswitch to be switched on when the power module needs to be replaced, controlling the first bypass switch to be switched off after the power module is replaced and powered on again and sending a powertaking stopping instruction to the second control module; a second bypass switch is connected in series with the DC output end; a second auxiliary power supply is used for taking power from an external power supply; and a second control module is used for controlling the second bypass switch to be switched off when the power module needs to be replaced, controlling the second bypass switch to beswitched on after the power module is replaced, controlling the replaced power module to take electricity from the direct-current side of the second AC/DC unit to charge the direct-current bus capacitor, and controlling the replaced power module to stop taking power from the DC side of the second AC/DC unit according to the power taking stopping instruction.
Owner:GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD. +2

On-load voltage regulation control circuit for roadway illumination control and control method thereof

The invention discloses an on-load voltage regulation control circuit for roadway illumination control and a control method thereof. The on-load voltage regulation control circuit comprises a winding, an AC connecting end and a load. The AC connecting end is provided with an L end and an N end. The winding is provided with a secondary coil and a plurality of primary coils. The secondary coil N1 is provided with a tap A1 and a tap A2, the tap A1 is connected with the L end, and the two ends of the load are connected with the tap A2 and the N end respectively. Taps of the primary coils are respectively connected with the N end through an on-off control circuit. The on-off control circuit is a combinational circuit including a plurality of switches, the number of the connected primary coils and the series-parallel connection structure can be selected through the on-off control circuit, and thus the voltage regulating size and precision can be changed. According to the on-load voltage regulation control circuit, the four different operation working conditions of normal voltage, boosting, voltage reduction and parallel connection can be achieved, the size is greatly decreased, the cost is greatly lowered, the discontinuous power supply problem can be solved, and the power supply reliability is improved.
Owner:NINGBO GREENTECH ENERGY SAVING TECH

Grid-side main circuit of industrial transmission system, transformer and control method

ActiveCN104852376AReduce secondary current harmonicsReduce size and cost
The invention discloses a transformer, which is applied to a grid-side main circuit of an industrial transmission system and connected with an AC bus. The transformer comprises at least two primary windings and at least two secondary windings corresponding to the primary windings, wherein the primary windings are in series connection, the secondary windings are mutually independent, and predetermined phase difference is reserved between two adjacent secondary windings. Because the primary windings are in series connection, the secondary windings are mutually independent, and the predetermined phase difference is reserved between two adjacent secondary windings. Secondary current harmonic of the transformer can be reduced when the transformer is connected with a grid-side converter containing a large number of high-power semiconductor devices. Furthermore, compared with a transformer with split windings, short-circuit impedance of the transformer provided by the invention is less than short-circuit impedance of the transformer with the split windings under a condition of the same primary short-circuit impedance, so that the size and the cost of the transformer can be reduced under the same capacity. In addition, the invention further discloses a grid-side main circuit comprising the transformer of the industrial transmission system and a control method.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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