51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Friday, December 18th, 2009 at 14:06 | No comments

Categories: EDA/PLD

Tags: FPGA, SPWM

Short Content: Abstract: This article in view of static compensator (STATCOM) to window signal's request, has designed one kind based on the FPGA sine pulse-duration modulation (SPWM) the profile generator. Through the sine modulating wave and the triangle carrier's comparison, has produced six group PWM signal impulse. The sine modulating wave's production uses the table look-up law, but only stores 1/4 cycle's sine wave data in ROM which the FPGA interior hardware constructs, reduced system's hardware expenses, the simulation result has ...

Sunday, October 4th, 2009 at 10:17 | No comments

Categories: DSP

Tags: frequency changer, invertor, overtone distortion factor, SPWM, Switch, TMS320LF2407

Short Content: Sees the AC/DC/AC frequency changer, is carries on the frequency conversion, the live pressure adjustment to the output unit, moreover in many kinds of inversion control technology, applies the most widespread one kind of inversion control technology is the sine pulse-duration modulation (SPWM) technology. In the frequency conversion velocity modulation system, realizes the numerical control using DSP as the control chip, it both enhanced the system reliability, and causes system's control precision to be high, timeliness is strong, the hardware ...

Thursday, June 11th, 2009 at 16:42 | No comments

Categories: DSP

Tags: digital phase-lock, DSP, SPWM

Short Content: Abstract: Bend down the system incorporation generating cost along with energy crisis's further aggravating and the light to continue to reduce, the light bends down the incorporation power technology application to be getting more and more widespread. In order to realize the light to bend down the contravariant system and electrical network's reliable parallel operation, used one kind to realize the digital phase-lock's method based on DSP chip TMS320C2407A, and made the confirmation through the experiment, the experimental result had ...

Wednesday, June 10th, 2009 at 14:02 | No comments

Categories: DSP

Tags: DSP, IGBT, SPWM

Short Content: Abstract: The regeneration energy which the servo electrical machinery when the movement process using the electric power electronic technology's in rectification, the inversion, as well as with the energy back coupling related signal reaction control, control technologies and so on digital signal processing (DSP), through the track capture network source signal, the fast brake and are frequent reverses produces by the SPWM wave form, transforms for and the network source signal synchronization electrical energy signal. Simultaneously filters in the regeneration ...

Thursday, March 19th, 2009 at 02:26 | No comments

Categories: Power Supply

Tags: inversion power source, Monolithic integrated circuit, SA8282, SPWM

Short Content: Abstract: Introduction three-phase contravariant power source which develops by the monolithic integrated circuit and SA8282. Has given the system overall constitution and the main circuit design, introduced SPWM the producer SA8282 structural property and the principle of work, the SA8282 entire digit operation, the working are flexible, the frequency range width, precision high function, may realize system's intellectualized design. In the article introduced in detail uses monolithic integrated circuit AT89C51 and SPWM producer SA8282 composes central controller's software and hardware ...

Thursday, February 12th, 2009 at 03:02 | No comments

Categories: Power Supply

Tags: Inversion, SPWM, top power source

Short Content: Abstract: Half fluid floats the rate gyro unit electric power supply take the reality engineering project in as the object of study. Introduced the SPWM technology's basic principle, has given the top power source's basic scheme which and system's design block diagram designs based on the SPWM technology. Proposed one kind realizes the contravariant power source's three-phase random angle bad method based on the succession. At the same time, has given monolithic integrated circuit 89S52 and the signal generating device ...

Monday, February 9th, 2009 at 20:02 | No comments

Categories: Power Supply

Tags: amplitude modulation, breakdown locking, Frequency modulation, IGBT, Power source, SPWM

Short Content: The abstract introduced (SPWM) the technology realizes the frequency modulation amplitude modulation output series resonance type power source's principle of work with the sine pulse-duration modulation. This power source has used the IGBT module constitution half bridge inversion electric circuit, it has the IGBT actuation, the pressure, the overflow, the overheated protection and the breakdown locking function. Key word sine pulse-duration modulation, IGBT module, breakdown locking, power source 1 introduction 　　The sine pulse-duration modulation and the frequency conversion velocity ...

Thursday, February 5th, 2009 at 05:53 | No comments

Categories: Power Supply

Tags: 80C196MC, Contravariant power source, Monolithic integrated circuit, SPWM, The light bends down the, to track

Short Content: Abstract: Has designed one kind of collection charge and the contravariant function bends down the inversion electrical power system in body's high efficiency light. The system is take the Inlel80C196MC chip as the control core, uses from seeks the optimum control way to realize solar cell's biggest power to track (MPPT); Simultaneously the invertor uses the SPWM control mode and the new PI regulator the direct current rapid inversion is the 220V/50Hz standard sine wave single phase AC power source.Key ...

Thursday, January 29th, 2009 at 03:53 | No comments

Categories: Power Supply

Tags: Entire bridge inversion, invertor, SPWM, unipolarity, zero crossing vibration

Short Content: Abstract: The unipolarity entire bridge inversion is opposite in the bipolarity inversion loses lowly, the electromagnetic interference are few, unipolarity SPWM is suitable for the contravariant control, but this control mode has a zero crossing vibration. Introduced the unipolarity inverts the bilateral SPWM control method, has analyzed this control method in the sine wave voltage zero crossing nearby oscillatory occurrences, proposes one kind of solution zero crossing vibration plan, and after experimental verification.Key word: Entire bridge inversion; Unipolarity; Sine wave ...

Wednesday, December 24th, 2008 at 11:05 | No comments

Categories: Power Supply

Tags: SPWM

Short Content:     Abstract: In the analysis frequency multiplication type SPWM incorporation invertor voltage measures the chart in the foundation, proposed one kind realizes the plan based on the TMS320LF2407DSP chip as controller's incorporation invertor. This plan realizes simply, the control is convenient, the related experiment profile has confirmed this plan accuracy.     Key word: Invertor; Control policy; The voltage measures the chart; Digital signal processor Introduction In order to solve the energy crisis which soon arrives, the development green, the sustainable ...