Title of Invention	"AN IMPROVED ELECTRONIC GOVERNING SYSTEM FOR A PRIME MOVER"
Abstract	-IThe present invention provides an improved electronic governing system for a prime -mover to maintain pre-defined speed irrespective of the load, a reduction in response time/ weight/cost comprising: - Electronic governor, - An "all electric actuator" connected to the output of said electronic governor, - Output shaft of said actuator is connected to input shaft of a hydraulic through a mechanical linkage, said hydraulic amplifier with a linear output is connected to controlling valve for controlling the flow of fuel, a magnetic pick up connecting between said electronic governor and the prime mover to sense and maintain the speed of said prime mover.

Title of Invention

"AN IMPROVED ELECTRONIC GOVERNING SYSTEM FOR A PRIME MOVER"

Abstract

-IThe present invention provides an improved electronic governing system for a prime -mover to maintain pre-defined speed irrespective of the load, a reduction in response time/ weight/cost comprising: - Electronic governor, - An "all electric actuator" connected to the output of said electronic governor, - Output shaft of said actuator is connected to input shaft of a hydraulic through a mechanical linkage, said hydraulic amplifier with a linear output is connected to controlling valve for controlling the flow of fuel, a magnetic pick up connecting between said electronic governor and the prime mover to sense and maintain the speed of said prime mover.

Full Text	This invention relates to an improved electronic governing system for a prime mover to maintain pre-defined speed irrespective of the load. Background Conventional Hydro mechanical governors for speed governing have the following disadvantages: Response time is high in case of load changes Routine maintenance is essential Maintenance cost is high Add on devices are required for speed monitory Speed cannot be controlled from remote place, therefore it cannot be centralized. Similarly conventional electronic governors have the following disadvantages: Initial cost of system is very high In case of fuel valve directly connected to the electric actuator, the power required to move the valve is entirely given by the said actuator. Thus a bigger actuator with higher power is required for this purpose. This increases the cost of the system and also the frame size of the actuator making it difficult to mount on the prime mover. The Object of this invention is to develop an improved electronic governing system to obviate the above drawbacks by converting a hydro-mechanical governor to hydraulic amplifier and thereby reducing the size of the actuator. Accordingly this invention provides an improved electronic governing system for a prime mover to maintain pre-defined speed irrespective of the load comprising: SI-TECH Xtend ADG governor (SI-TECH Xtend is a registered Trademark of M/s Dawson Technology), an all electric actuator connected to the output of said ADG governor, output shaft of said actuator is connected to input shaft of a hydraulic amplifier through a mechanical linkage, said hydraulic amplifier with a linear output is connected to controlling valve for controlling the flow of fuel to the prime mover, a magnetic pick up connected between the shaft of said prime mover and said ADG governor to sense and maintain the speed of said prime mover The hydro-mechanical governor is converted to hydraulic amplifier by removing fly weight, speed setting springs and other controlling parts forming the brain part and the remaining parts i.e. the compensation part and power part of the hydro mechanical governor are used for compensation and to provide power required to operate the fuel valve. The compensation part and power part comprising a pilot valve, piston power assembly and compensation system with a linear output to amplify the low level all electric actuator output to an appropriate usable level for actuating the fuel valve. The said SI-TECH Xtend ADG governor is a microprocessor based digital speed control and is powered by 24Volts D.C power supply with power back up for at least 4-6 hours. The said magnetic pickup is connected to the prime mover though toothed wheel mounted on the shaft of the prime mover, which gives electrical output signal to the governor, which is proportional to the actual speed. This invention will now be described with reference to the accompanying drawings. Figure 1 shows Si-TEC Xtend ADG electronic governor. Figure 1 a shows the line diagram of improved electronic governing system for a prime mover. Figure 2 shows an all electric actuator. Figure 3 shows hydraulic amplifier connected to all electric actuator and ADG governor. Figure 4 shows magnetic pick-up and a connector. Figure 5 shows the hydro-mechanical governor converted to the hydraulic amplifier used in the instant invention Referring to figure la, numeral (1) shows Si-tec Xtend ADG governor, which is a microprocessor based digital speed controller. It is connected to an all electric actuator (2). The said actuator (2) is connected to the hydraulic amplifier (3) through a mechanical linkage (4). The said hydraulic amplifier (3) is connected to a control valve (5) through which the fuel goes to the prime-mover (6). The magnetic pick up (11) is connected between said ADG Governor (1) and the shaft (7) of the prime-mover (6) to sense and maintain the speed of prime-mover (6). All Electric Actuator (2) receives a signal from ADG electronic governor (1) and gives mechanical output through the serrated output shaft (8), which is connected to the hydraulic amplifier (3). This device is operated through inbuilt DC disc motor (12) and does not require drive from the prime mover (6) thereby not prone to frequent maintenance (see figures 1, 2 & 3). The hydro mechanical governor mainly consists of three parts, namely, brain part, compensation part (13) and power part (14). The said hydro mechanical governor is converted to hydraulic amplifier (3) by removing fly weight, speed setting springs and other controlling parts forming the brain part and the remaining parts, viz. the compensation part (13) and the power part (14) of the hydro mechanical are used in the hydraulic amplifier for providing power required for controlling the rpm of the prime mover (6) through said ADG governor (1). The pilot valve (15) is connected through mechanical parts (16, 17, 18) and input shaft (9) to the output of all electric actuator (2) in such a way that the pilot valve (15) movement becomes compatible with the actuator (2) movement (see figures 2, 3 & 5). Hydraulic amplifier (3) consists of pilot valve (15), power piston part (14) and compensation part (13) with a linear output (L) to control the fuel valve (5) of the prime mover (6). This hydraulic amplifier (3) is basically used to amplify the low level all electric actuator (2) output to an appropriate usable level for actuating the fuel valve (5). The electronic governor Si-Tec Xtend ADG governor (1) controls the position of the amplifier (3) through mechanical linkage (4) between said electric actuator (2) and hydraulic amplifier (3). The input shaft (9) of the hydraulic amplifier (3) is directly connected to the output shaft (8) of All electric actuator (2). Any change in position of the all electric actuator (2) is transmitted through output shaft (8) to said amplifier input shaft (9) through mechanical linkage (4). The input shaft (9) of the hydraulic amplifier (3) is connected to the plunger of pilot valve (12) of said amplifier (3), which controls the flow of pressurized oil through compensating system (13) to drain. During an on speed condition, the electronic governor (1) through electric actuator (2) maintains the rpm of the prime mover (6) through said amplifier output shaft (10) in a given position (See figures la, 2 & 5). The magnetic pick up (11) is shown in figure 4. It consists of magnetic pick up (11) and a connector (C). Si-Tec Xtend ADG governor (1) is shown separately in figure 1. It is a known governor. ADVANTAGES: Cost effective This system controls speed very precisely when compared to hydro mechanical governor The system will provide semi automatic startup system, which in case of hydro mechanical governor is not feasible. The added advantage of this system is that the system has analogue input for reference speed setup set point through which the prime movers can be operated in variable speed, which cannot be done effectively in case of hydro mechanical governor Hydro mechanical governor cannot communicate with centralized control system whereas the improved electronic governing system can communicate with a centralized control system. Remote speed indicator can be used The prime mover can be controlled from centralized control room. Continuous on line monitoring of important process parameters viz. inlet pressure, exhaust pressure, lube oil pressure and lube oil temperature is possible only putting respective sensing devices Internal communication is possible between two sets by a communication cable connection. We Claim: 1. An improved electronic governing system for a prime -mover to maintain pre-defined speed irrespective of the load, reduction in cost, weight and time of response comprising an electronic governor (1), an electric actuator (2) connected to the output of this electronic governor (1), an output shaft of the actuator (8) which is connected to input shaft of hydraulic amplifier through a mechanical linkage (4), the hydraulic amplifier (3) with a linear output being connected to controlling valve (5) for controlling the flow of fuel, and a magnetic pick up (11) connecting between the electronic governor (1) and the prime mover (6) to sense and maintain the speed of the prime mover (6) 2. An improved electronic governing system as claimed in claim 1 wherein a hydro mechanical governor is converted to hydraulic amplifier (3) by removing fly weight, speed setting springs and other controlling parts forming the brain part, thereby achieving a significant weight reduction and the remaining parts i.e. the compensation part (13) and power part (14) of the hydro mechanical governor being used for providing sufficient power to operate the fuel valve (5). 3. An improved electronic governing system as claimed in claim 1 wherein the converted hydraulic amplifier (3) with the said compensation part (13) and power part (14) comprises a pilot valve, piston power assembly and compensation system with a linear output to amplify the low level output of all electric actuator (2) to an appropriate usable level for actuating the fuel valve (5). 4. An improved electronic governing system as claimed in claim 1 wherein electronic governor (1) is a microprocessor based on digital speed control. 5. An improved electronic governing system as claimed in claim 1 wherein the said magnetic pickup (11) is connected to the prime mover (6) through toothed wheel mounted on the shaft (7) of the prime mover (6) which gives electrical output signal to the governor which is directly proportional to the actual speed. (See Fig. - 1 A) 6. An improved electronic governing system (Fig. 1 A) as claimed in claim 1 for a prime mover (6) which maintains pre- defined speed irrespective of the load change, considerably reduces the response time (settling time of governor being 200 - 500 milliseconds), considerably reduces the number of parts and thereby the cost and weight.

Full Text

This invention relates to an improved electronic governing system for a prime mover to maintain pre-defined speed irrespective of the load.
Background
Conventional Hydro mechanical governors for speed governing have the following disadvantages:
Response time is high in case of load changes
Routine maintenance is essential
Maintenance cost is high
Add on devices are required for speed monitory
Speed cannot be controlled from remote place, therefore it cannot be
centralized.
Similarly conventional electronic governors have the following disadvantages:
Initial cost of system is very high
In case of fuel valve directly connected to the electric actuator, the
power required to move the valve is entirely given by the said
actuator. Thus a bigger actuator with higher power is required for this
purpose. This increases the cost of the system and also the frame size
of the actuator making it difficult to mount on the prime mover.
The Object of this invention is to develop an improved electronic governing system to obviate the above drawbacks by converting a hydro-mechanical governor to hydraulic amplifier and thereby reducing the size of the actuator.
Accordingly this invention provides an improved electronic governing system for a prime mover to maintain pre-defined speed irrespective of the load comprising:
SI-TECH Xtend ADG governor (SI-TECH Xtend is a registered Trademark of M/s Dawson Technology),
an all electric actuator connected to the output of said ADG governor, output shaft of said actuator is connected to input shaft of a hydraulic amplifier through a mechanical linkage,
said hydraulic amplifier with a linear output is connected to controlling valve for controlling the flow of fuel to the prime mover, a magnetic pick up connected between the shaft of said prime mover and said ADG governor to sense and maintain the speed of said prime mover
The hydro-mechanical governor is converted to hydraulic amplifier by removing fly weight, speed setting springs and other controlling parts forming the brain part and the remaining parts i.e. the compensation part and power part of the hydro mechanical governor are used for compensation and to provide power required to operate the fuel valve.
The compensation part and power part comprising a pilot valve, piston power assembly and compensation system with a linear output to amplify the low level all electric actuator output to an appropriate usable level for actuating the fuel valve.
The said SI-TECH Xtend ADG governor is a microprocessor based digital speed control and is powered by 24Volts D.C power supply with power back up for at least 4-6 hours.
The said magnetic pickup is connected to the prime mover though toothed wheel mounted on the shaft of the prime mover, which gives electrical output signal to the governor, which is proportional to the actual speed.
This invention will now be described with reference to the accompanying drawings.
Figure 1 shows Si-TEC Xtend ADG electronic governor.
Figure 1 a shows the line diagram of improved electronic governing system for a prime mover.
Figure 2 shows an all electric actuator.
Figure 3 shows hydraulic amplifier connected to all electric actuator and ADG governor.
Figure 4 shows magnetic pick-up and a connector.
Figure 5 shows the hydro-mechanical governor converted to the hydraulic amplifier used in the instant invention
Referring to figure la, numeral (1) shows Si-tec Xtend ADG governor, which is a microprocessor based digital speed controller. It is connected to an all electric actuator (2). The said actuator (2) is connected to the hydraulic amplifier (3) through a mechanical linkage (4). The said hydraulic amplifier (3) is connected to a control valve (5) through which the fuel goes to the prime-mover (6). The magnetic pick up (11) is connected between said ADG Governor (1) and the shaft (7) of the prime-mover (6) to sense and maintain the speed of prime-mover (6).
All Electric Actuator (2) receives a signal from ADG electronic governor (1) and gives mechanical output through the serrated output shaft (8), which is connected to the hydraulic amplifier (3). This device is operated through inbuilt DC disc motor (12) and does not require drive from the prime mover (6) thereby not prone to frequent maintenance (see figures 1, 2 & 3).
The hydro mechanical governor mainly consists of three parts, namely, brain part, compensation part (13) and power part (14). The said hydro mechanical governor is converted to hydraulic amplifier (3) by removing fly weight, speed setting springs and other controlling parts forming the brain part and the remaining parts, viz. the compensation part (13) and the power part (14) of the hydro mechanical are used in the hydraulic amplifier for providing power required for controlling the rpm of the prime mover (6) through said ADG governor (1). The pilot valve (15) is connected through mechanical parts (16, 17, 18) and input shaft (9) to the output of all electric actuator (2) in such a way that the pilot valve (15) movement becomes compatible with the actuator (2) movement (see figures 2, 3 & 5).
Hydraulic amplifier (3) consists of pilot valve (15), power piston part (14) and compensation part (13) with a linear output (L) to control the fuel valve (5) of the prime mover (6). This hydraulic amplifier (3) is basically used to amplify the low level all electric actuator (2) output to an appropriate usable level for actuating the fuel valve (5). The electronic governor Si-Tec Xtend ADG governor (1) controls the position of the amplifier (3) through mechanical linkage (4) between said electric actuator (2) and hydraulic amplifier (3). The input shaft (9) of the hydraulic amplifier (3) is directly connected to the output shaft (8) of All electric actuator (2). Any change in position of the all electric actuator (2) is transmitted through output shaft (8) to said amplifier input shaft (9) through mechanical linkage (4). The input
shaft (9) of the hydraulic amplifier (3) is connected to the plunger of pilot valve (12) of said amplifier (3), which controls the flow of pressurized oil through compensating system (13) to drain. During an on speed condition, the electronic governor (1) through electric actuator (2) maintains the rpm of the prime mover (6) through said amplifier output shaft (10) in a given position (See figures la, 2 & 5).
The magnetic pick up (11) is shown in figure 4. It consists of magnetic pick up (11) and a connector (C). Si-Tec Xtend ADG governor (1) is shown separately in figure 1. It is a known governor.
ADVANTAGES:
Cost effective
This system controls speed very precisely when compared to hydro
mechanical governor
The system will provide semi automatic startup system, which in case
of hydro mechanical governor is not feasible.
The added advantage of this system is that the system has analogue
input for reference speed setup set point through which the prime
movers can be operated in variable speed, which cannot be done
effectively in case of hydro mechanical governor
Hydro mechanical governor cannot communicate with centralized
control system whereas the improved electronic governing system can
communicate with a centralized control system.
Remote speed indicator can be used
The prime mover can be controlled from centralized control room.
Continuous on line monitoring of important process parameters viz.
inlet pressure, exhaust pressure, lube oil pressure and lube oil
temperature is possible only putting respective sensing devices
Internal communication is possible between two sets by a
communication cable connection.

We Claim:
1. An improved electronic governing system for a prime -mover to maintain pre-defined
speed irrespective of the load, reduction in cost, weight and time of response comprising
an electronic governor (1), an electric actuator (2) connected to the output of this
electronic governor (1), an output shaft of the actuator (8) which is connected to input
shaft of hydraulic amplifier through a mechanical linkage (4), the hydraulic amplifier
(3) with a linear output being connected to controlling valve (5) for controlling the flow
of fuel, and a magnetic pick up (11) connecting between the electronic governor (1) and
the prime mover (6) to sense and maintain the speed of the prime mover (6)
2. An improved electronic governing system as claimed in claim 1 wherein a hydro
mechanical governor is converted to hydraulic amplifier (3) by removing fly weight,
speed setting springs and other controlling parts forming the brain part, thereby
achieving a significant weight reduction and the remaining parts i.e. the compensation
part (13) and power part (14) of the hydro mechanical governor being used for providing
sufficient power to operate the fuel valve (5).
3. An improved electronic governing system as claimed in claim 1 wherein the converted
hydraulic amplifier (3) with the said compensation part (13) and power part (14)
comprises a pilot valve, piston power assembly and compensation system with a linear
output to amplify the low level output of all electric actuator (2) to an appropriate usable
level for actuating the fuel valve (5).
4. An improved electronic governing system as claimed in claim 1 wherein electronic
governor (1) is a microprocessor based on digital speed control.
5. An improved electronic governing system as claimed in claim 1 wherein the said
magnetic pickup (11) is connected to the prime mover (6) through toothed wheel
mounted on the shaft (7) of the prime mover (6) which gives electrical output signal to
the governor which is directly proportional to the actual speed. (See Fig. - 1 A)
6. An improved electronic governing system (Fig. 1 A) as claimed in claim 1 for a prime
mover (6) which maintains pre- defined speed irrespective of the load change,
considerably reduces the response time (settling time of governor being 200 - 500
milliseconds), considerably reduces the number of parts and thereby the cost and weight.

Documents:

2189-del-2005-abstract-09-05-2008.pdf

2189-del-2005-abstract-12-05-2008.pdf

2189-del-2005-abstract.pdf

2189-del-2005-claims-09-05-2008.pdf

2189-del-2005-claims-12-05-2008.pdf

2189-del-2005-claims.pdf

2189-del-2005-correspondence-others-09-05-2008.pdf

2189-del-2005-correspondence-others-12-05-2008.pdf

2189-del-2005-correspondence-others.pdf

2189-del-2005-description (complete)-09-05-2008.pdf

2189-del-2005-description (complete)-12-05-2008.pdf

2189-del-2005-description (complete).pdf

2189-del-2005-drawings-09-05-2008.pdf

2189-del-2005-drawings-12-05-2008.pdf

2189-del-2005-drawings.pdf

2189-del-2005-form-1-12-05-2008.pdf

2189-del-2005-form-1.pdf

2189-del-2005-form-18.pdf

2189-del-2005-form-2-09-05-2008.pdf

2189-del-2005-form-2-12-05-2008.pdf

2189-del-2005-form-2.pdf

2189-del-2005-form-26-12-05-2008.pdf

2189-del-2005-form-3-12-05-2008.pdf

2189-del-2005-form-9.pdf

2189-del-2005-gpa.pdf

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Patent Number

221483

Indian Patent Application Number

2189/DEL/2005

PG Journal Number

31/2008

Publication Date

01-Aug-2008

Grant Date

24-Jun-2008

Date of Filing

17-Aug-2005

Name of Patentee

GOV. CONTROLS (INDIA) PVT. LTD.

Applicant Address

CHITALE & CHITALE PARTNERS C-83, NEETI BAGH, NEW DELHI-110049,INDIA

Inventors:

#	Inventor's Name	Inventor's Address
1	VINOD DUA	F-3/3 OKHLA INDUSTRIAL AREA, PHASE I, NEW DELHI-110020
2	NARAYAN CHAKRABORTY	F-3/3 OKHLA INDUSTRIAL AREA, PHASE I, NEW DELHI-110020

PCT International Classification Number

G01R 11/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA