Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device
Patent
1996-11-25
1998-10-13
Hecker, Stuart N.
Electricity: power supply or regulation systems
Output level responsive
Using a transformer or inductor as the final control device
323255, G05F 116
Patent
active
058217398
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to voltage or current adjusting means which is indispensable to an electric control unit such as a stabilized power supply unit, an electric motor control unit, a power control unit or a variety of power supply units. The present invention also relates to a static type voltage or current adjuster (hereinafter referred to as "electric adjuster") of a novel system which is high in efficiency, high in response speed, small in size, light in weight, limitless in load power factor, and relatively simple to make the accuracy high without generating a power-supply harmonic current.
2. Description of the Related Art
Nowadays, as a result of miniaturizing of electronic components and a high integration, electronic equipments are realized to be made small in size, light in weight, low in costs and high in efficiency with an enhancement of their function and accuracy year by year. In case of the above electric control unit or the like, because of the characteristics inherent to a power converter, the like progress with other electronic equipments is difficult. Basically, since the electric control unit takes over old technique as it is, and also, in a thyristor phase control system or a switching system, electromagnetic interference in other electronic equipments which are caused during switching operation or a harmonic current which is generated during the switching operation adversely affects an electric power system of an electric power company. For the above and other reasons, the great progress of the conventional technique could not be expected.
As the control systems for the conventional electric adjuster, the CVT system, the sliding system, the magnetic amplifier system, the tap switching system, the thyristor phase control system and the switching system are mainly employed. The main performances required for the electric adjuster of the electric control unit include high efficiency, a high-speed response, a small size with light weight, no power-supply higher harmonics, no limitation of load power factor, simple to obtain a high precision, a high reliability, low costs, a static type, and so on.
In case of the sliding system, since it is not of the static type but has a movable portion, the frequent repairing is required, and the reliability is low. Also, there are limitations of making the efficiency high, the response speed high, the size small, the weight light and the precision high. In case of the CVT system and the magnetic amplifier system, because they are of the static type, although the reliability is high, it is very heavy in weight, and therefore, there are limitations of making the efficiency high, the response speed high, the size small with light weight and the precision high. In case of the tap switching system, a switching period is long, and the control resolution is low. In addition, there are limitations of making the efficiency high, the size small and the weight light. In case of the thyristor phase control system and the switching system, there arise problems such as electromagnetic interferences caused by the distortion of an output voltage waveform or the generation of switching noises, and a harmonic current, and also such a problem that it cannot be used for a load low in power factor. Moreover, there also have limitations of making the efficiency high, the response speed high, and the size small with light weight and the precision high.
SUMMARY OF THE INVENTION
The present invention has been made to eliminate the problems with the conventional electric adjusters, and therefore an object of the present invention is to provide a novel electric adjuster in place of the control systems such as the CVT system employed in the conventional electric adjusters, the sliding system, the magnetic amplifier system, the tap switching system, the thyristor phase control system and the switching system.
Another object of the present invention is to provide a static type electric adjuster which is improved wit
REFERENCES:
patent: 1430987 (1922-10-01), Hanff
patent: 3603971 (1971-09-01), Woschetzky et al.
patent: 3978395 (1976-08-01), Legnaioli
patent: 4220911 (1980-09-01), Rosa
patent: 4348590 (1982-09-01), Daniels et al.
patent: 4454466 (1984-06-01), Ritter
patent: 4748341 (1988-05-01), Gupta
patent: 5602462 (1997-02-01), Stich et al.
LandOfFree
Electric adjuster does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric adjuster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric adjuster will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-316282