DESC:FIELD OF THE INVENTION:

The present invention relates to an electrical device and more particularly a multifunctional single core based compact reversible servo stabilizer for obtaining shock free electric power and stabilized voltage supply.

BACKGROUND OF THE INVENTION:

The voltage stabilizer is a device that stabilizes the output voltage. The voltage stabilizer is composed of a voltage regulating circuit, a control circuit, a servo motor and the like. When the input voltage or load changes, the control circuit performs sampling, comparison, amplification, and then drives the servo motor to rotate, so that the position of the carbon brush of the voltage stabilizer is changed, and by automatically adjusting the turn ratio of the coil, the stability of the output voltage is maintained, and the voltage stabilizer has an input voltage adaptation range. The IEC standard is that the input voltage changes within the range of ±20 of the rated value, beyond the range, i.e., automatic acousto-optic alarm and cannot stabilize the output voltage within the required range.
The conventional servo stabilizers include an auto transformer also called dimmer transformer/continuous variable transformer/variac/and has a toroidal shaped core and is connected between input phase and neutral and control the output of the buck boost transformer. Only the correction load is on this transformer. In the buck boost transformer, the primary winding is connected to input phase, while the secondary winding is attached to the tapping and carbon. Total load is on this transformer. This assembly is operated with following components as a synchronous motor also called servo motor which drives or rotate the arm of auto- transformer, electronic circuit also called servo motor circuit which operates the servo motor to move clockwise or anticlockwise direction depends upon correction we require when compared to input voltage, Carbon brush, the only wear and tear part involved in servo stabilizer, fitted in the fingers of arm of auto transformer. The weight of autotransformer & buck-boost transformer becomes too much due to 2 different cores used in this type of assembly.

The present invention overcomes the aforesaid drawbacks and operates on a single core. It will help in reduction of area, weight & cost of any given capacity of servo voltage stabilizer by 30 to 40% making it easier for logistics, installation area & most important affordability.

OBJECTS OF THE INVENTION:

The primary objective of the present invention is to provide a compact reversible servo stabilizer for obtaining shock free electric power and stabilized voltage supply that operates on a single core.

Another object of the present invention is to provide a servo stabilizer that can sense reference voltage from either primary winding or secondary winding to get the desired input or output.

Another object of the present invention is to provide a single compact servo stabilizer that can be operated in various arrangements.

Another object of the present invention is to provide a compact servo stabilizer with less weight.

SIGNIFICANCE OF THE INVENTION

The main significance of the present invention is that it provides the range of desired output which can be achieved variably based on any ratio between primary and secondary winding.

Another significance of the present invention is that either of the fixed winding or variable winding can be used as primary winding or secondary winding depending upon the incoming voltage.

Another significance of the present invention is to provide a device that occupies less area, weight & cost of any given capacity of servo voltage stabilizer by 30 to 40%.

Another significance of the present invention is its affordability and economic on logistics and installation.

SUMMARY OF THE INVENTION:

The present invention is a toroidal transformer comprising two isolated windings separately wound one above another on a single core. Further the present invention comprises a fixed/inner winding inductively coupled to the variable/outer winding. The variable winding contains a variac/sliding arm that operates according to the input voltage at either winding.

The preferred embodiment of the present invention is designed to regulate and attain desired voltage either by sensing variable input/output or fixed input/output.
The input voltage received at either winding is continuously sensed by the sensing circuit of the synchronous motor and it gives feedback to main control circuit which consists of a microprocessor. The said microprocessor continuously receives values of input voltages and compares with the reference value embedded in its program. Therefore, depending upon the receiving high or low voltage, the microprocessor gives trigger to motor driver, the synchronous motor connected to the transformer arm/sliding arm enabling it to rotate either clockwise or anticlockwise directions. Based on amount of high voltage or low voltage received, motor driver moves servo motor across the variable winding so as to increase or decrease the number of winding and hence stabilizing the output voltage. When the input voltage is lower than the stipulated rating, the difference will act as a trigger signal for the arm of the variable winding to rotate in one certain direction. Vice-versa, when the input voltage is higher than the stipulated rating, the difference will act as a trigger signal for the arm of the variable winding to rotate in opposite direction. Here, the transformer arm acts as the variac arm and regulates the voltage draws desired constant voltage by getting rotated on variable winding at required position to in accordance with the input voltage given on the fixed winding.

In an embodiment of the invention, either of the primary winding or secondary winding can be used as a fixed winding or variable winding.

Another embodiment of the invention, any of the primary winding or secondary winding can be used as an input or output.

Another embodiment of the invention, the proportion of the secondary winding can be taken in plurality of proportions as per the need of the design of the stabilizer.

BRIEF DESCRIPTION OF DRAWINGS

Fig 1 illustrates the overview of the servo stabilizer

Fig 1A illustrates the the arrangement when the transformer senses the fixed input and the output is achieved as variable

Fig 1B illustrates the arrangement when the transformer senses the fixed output and changes the variable input

Fig 2A illustrates the arrangement when the transformer senses the end to end output and changes the variable output

Fig 2B illustrates the arrangement when the transformer senses the end to end input and changes the variable input.

Fig 3A illustrates the arrangement when the transformer senses the variable output and changes the variable output

Fig 3B illustrates the arrangement when the transformer senses and changes the variable input.

DETAILED DESCRIPTION OF THE INVENTION:

The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more systems or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other systems, sub-systems, elements, structures, components, additional systems, additional sub-systems, additional elements, additional structures or additional components.
Appearances of the phrase “in an embodiment”, “in another embodiment” and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.

The present invention can be understood with the help of Fig 1 that discloses a servo stabilizer (100) comprising two isolated windings; the inner winding (101) and an outer winding (102); the inner winding being a fixed winding and an outer winding being a variable winding wound one over another on a single toroidal shaped core wherein the inner winding and the outer winding are inductively coupled.

The present invention further comprises a variac arm (103) assembly containing a carbon brush (1031) at its tip adapted to move on the variable winding. The variac arm is designed to regulate the received voltage and is configured to adjust input AC voltage up or down by moving either clockwise or anticlockwise on variable winding to achieve desired output voltage.

Further, the present invention comprises an electronic circuit connected to the synchronous motor (104) placed above the core; configured to sense the input voltage which in turn drives the variac arm to rotate on variable winding to achieve desired output voltage.
The input/incoming voltage can be received at either of the inner/fixed winding or outer/variable winding and accordingly the winding that is receiving the input voltage acts as primary winding and vice versa.
The said electronic circuit continuously senses the input voltage and gives feedback to main control circuit consisting of a microprocessor. The said microprocessor continuously receives values of input voltages and compares with the reference value embedded in its program. Whenever there is high or low voltage at input, the microprocessor gives trigger to motor driver of the synchronous motor connected to the variac arm enabling it to rotate on either directions (clockwise or anticlockwise). Based on amount of high voltage or low voltage received at input, motor driver moves the motor across the variable winding so as to increase or decrease the number of winding and regulates the voltage at the output terminals.
Similarly, when the input voltage is lower than the stipulated rating, the difference will act as a trigger signal for the variac arm to rotate in one certain direction. Vice-versa, when the input voltage is higher than the stipulated rating, the difference will act as a trigger signal for the variac arm to rotate in opposite direction.
Further the present invention provides the range of desired output which can be achieved variably based on any ratio between primary and secondary winding.

The present invention is designed to attain a desired voltage in the secondary winding of the transformer to use it as the stabilized voltage for the load ahead. The present invention can work in various conditions and the desired output can be achieved by taking any suitable ratio between primary and secondary winding to manage a variety of input and/or output voltage range as per requirement, the same is described herein below:

Condition 1: According to Fig 1A, when there is fixed input, the transformer senses the fixed input and the desired variable output is achieved. The arrangement as disclosed in Fig 1A is useful when input voltage is average and constant but the load value keeps fluctuating.

Condition 2: According to Fig 1B, when the desired output is fixed, the transformer changes the variable input as per the requirements. The arrangement as disclosed as Condition 1B is useful when power supply is average but fluctuating and load value is constant.

Condition 3: According to Fig 2A, the transformer senses the end to end output and changes the variable output as desired. The arrangement as disclosed as Condition 2A is useful when power supply is constant but low and load value fluctuation is frequent.

Condition 4: According to Fig 2B, the transformer senses the end to end input and changes the variable input as desired. The arrangement as disclosed as Condition 2B is useful when power supply is average low and fluctuating voltage and load value is constant.

Condition 5: According to Fig 3A, the transformer senses the variable output and changes the variable output as desired. The arrangement as disclosed as Condition 3A is useful when power supply is constant but high and load value fluctuation is frequent.

Condition 6: According to Fig 3B, the transformer senses and changes the variable input as desired. The arrangement as disclosed as Condition 3B is useful when power supply is average high and fluctuating voltage and load value is constant.

In the present invention the range of the desired output depends on two factors, firstly the desired output can be achieved by taking any suitable ratio between primary and secondary winding to manage a variety of input and/or output voltage range as per requirement. Secondly, the proportion of the secondary winding taken on the last layer that can be taken variably as full, half and 1/3rd or in any proportion as per the need of the design of the stabilizer.

,CLAIMS:Claims
We claim:
1. A single core based compact reversible servo stabilizer comprising:

an inner winding and an outer winding; the inner winding being a fixed winding and an outer winding being a variable winding wound one over another on a single toroidal shaped core
wherein the inner winding and the outer winding are inductively coupled.

a carbon brush assembly having a variac arm configured to achieve voltage stabilization by moving either clockwise or anticlockwise based on the amount of input voltage received;
wherein the amount of input voltage may be more/less than the stipulated rating; the difference of input voltage than the stipulated rating acts as the trigger for the variac arm that moves accordingly to obtain voltage stabilization;

a motor connected to the variac arm, adapted to sense input voltage received at either primary winding or secondary winding;

a microprocessor based circuit adapted to compare input voltage values received with the reference values embedded in its program;

2. A single core based compact reversible servo stabilizer as claimed in claim 1 wherein the range of desired output can be achieved by taking any suitable ratios between primary and secondary winding.

3. A single core based compact reversible servo stabilizer as claimed in claim 1 wherein either of the fixed winding or variable winding can be used as primary winding or secondary winding.

4. A single core based compact reversible servo stabilizer as claimed in claim 1 wherein the proportion of the secondary winding can be taken in plurality of proportions as per the need of the design of the stabilizer.