Harry Ward Leonard (February 8, 1861 – February 18, 1915) was an electrical engineer and inventor. He is best known for his invention, the Ward Leonard motor control system. Equipment based on this invention remained in service into the 21st century.
Early life and heritage
Harry was born on February 8, 1861 in Cincinnati, Ohio to Ezra George Leonard and Henrietta Dana Ward. He was the fourth of their six children. He was a great great grandson of American Revolutionary War General Artemas Ward. Although his surname was evidently “Leonard” and not “Ward-Leonard,” he apparently identified himself as either Harry Ward Leonard or H. Ward Leonard. In 1895, Harry was married to Carolyn Good in Geneva, Switzerland.
As a student at the Massachusetts Institute of Technology (MIT), Harry was instrumental in founding the student newspaper, The Tech, and served as the president of the paper’s board of directors. He graduated from MIT in 1883.
Career
After graduating from MIT, Mr. Leonard was employed by Thomas Edison to help introduce the Edison central-station electric power distribution system. Within four years, he was promoted to the position of general superintendent of the Western Electric Light Company of Chicago, Illinois. The following year, he established Leonard and Izard, a firm that set up electric railways and generating stations. In 1889, his firm was acquired by Edison and Leonard became the general manager of the Edison operations in the United States and Canada. In 1896, Leonard organized and became president of Ward Leonard Electric as an Edison company in Hoboken, New Jersey. In 1898, Mr. Leonard left the Edison organization and incorporated his own Ward Leonard Electric Company on February 19, 1898 in the village of Bronxville in Westchester County, New York.
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Harry Ward Leonard
Harry Ward Leonard war ein US-amerikanischer Elektroingenieur und Erfinder.Seine 30-jährige Karriere spannte sich vom späten 19.bis in das frühe 20.Jahrhundert.
✪Video ist an blinde Nutzer gerichtet
✪Text verfügbar unter der Lizens CC-BY-SA
✪Bild Quelle im Video
published: 26 Jun 2016
Ward Leonard Speed Control Applications
Ward Leonard Speed Control Applications
Ward Leonard speed control is a type of electrical control system that is used to regulate the speed of electric motors. This type of control system is named after its inventor, Harry Ward Leonard, an American electrical engineer. The system is widely used in a variety of applications, including manufacturing, transportation, and power generation.
The Ward Leonard system consists of two main components: a DC motor, and a DC generator. The DC generator is driven by a separate AC motor, which is connected to a power supply. The DC generator produces a DC voltage that is proportional to the speed of the AC motor.
The DC motor is connected to the load that needs to be controlled, such as a conveyor belt, a pump, or a fan. The DC motor speed is control...
published: 10 Mar 2023
Ward Leonard - Excellence in Motor & Control Solutions
Ward Leonard is a global industrial technology company that develops highly engineered motor, generator, control and MRO (maintenance, repair and overhaul) solutions for a diverse range of Energy, Heavy Industry and Government customers worldwide. For over 120 years, our products and services have harnessed power to solve complex, mission-critical infrastructure applications, and enabled our customers to achieve benchmark performance, productivity and uptime in the world's most demanding environments.
published: 23 Jan 2014
Ward Leonard Control
Ward Leonard control, also known as the Ward Leonard drive system, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S. Navy and also used in passenger lifts of large mines. It also provided a solution to a moving sidewalk at the Paris Exposition of 1900, where many others had failed to operate properly. It was applied to railway locomotives used in World War I, and was used in anti-aircraft radars in World War II. Connected to automatic anti-aircraft gun directors, the tracking motion in two dimensions had to be extremely smooth and precise. The MIT Radiation Laboratory selected Ward-Leonard to equip the famous radar SCR-584 in 1942. The Ward Leonard control system was widely...
published: 26 Dec 2020
dc motor ward leonard speed control virtual lab simulation
published: 15 Sep 2024
Ward Leonard
published: 09 Mar 2019
Aufzugsteuerung mit Leonardsatz
In diesem Video wird die auslaufende Umformer-Technik von Harry Ward Leonard in einer Aufzugssteuerung gezeigt. In einem Ward-Leonard-Umformer treibt ein Primärantrieb einen Gleichstrom-Generator mit konstanter Geschwindigkeit an. Die Regelung der Drehzahl eines angeschlossenen Gleichstrommotors erfolgt über die Veränderung des Erregerstromes am Generator. Dieser Regelungstyp wird heutzutage durch eine Frequenzansteuerung ersetzt und ist deshalb am Aussterben. Besonders filigran ist in dieser Steuerung das Kopierwerk der Fa. OTIS entwickelt. Wie schon der Name aussagt, wird der gesamte Schacht mit seinen Etagen proportional in einem Kopierwerk dargestellt. Alle Einstellungen für die Fahreigenschaften werden hier vorgenommen.
published: 24 Oct 2008
CONTROL DE VELOCIDAD SISTEMA WARD LEONARD
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published: 12 Dec 2023
Ward Leonard speed control in hindi || DC motor
This video is helping you to understand how ward Leonard speed control is work by simple concept 👌
Thanks for watching 😊
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Vielen Dank für Ihre Unterstützung:
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Harry Ward Leonard
Harry Ward Leonard war ein US-amerikanischer Elektroingenieur und Erfinder.Seine...
Vielen Dank für Ihre Unterstützung:
https://amzn.to/2UKHXys
Harry Ward Leonard
Harry Ward Leonard war ein US-amerikanischer Elektroingenieur und Erfinder.Seine 30-jährige Karriere spannte sich vom späten 19.bis in das frühe 20.Jahrhundert.
✪Video ist an blinde Nutzer gerichtet
✪Text verfügbar unter der Lizens CC-BY-SA
✪Bild Quelle im Video
Vielen Dank für Ihre Unterstützung:
https://amzn.to/2UKHXys
Harry Ward Leonard
Harry Ward Leonard war ein US-amerikanischer Elektroingenieur und Erfinder.Seine 30-jährige Karriere spannte sich vom späten 19.bis in das frühe 20.Jahrhundert.
✪Video ist an blinde Nutzer gerichtet
✪Text verfügbar unter der Lizens CC-BY-SA
✪Bild Quelle im Video
Ward Leonard Speed Control Applications
Ward Leonard speed control is a type of electrical control system that is used to regulate the speed of electric motors...
Ward Leonard Speed Control Applications
Ward Leonard speed control is a type of electrical control system that is used to regulate the speed of electric motors. This type of control system is named after its inventor, Harry Ward Leonard, an American electrical engineer. The system is widely used in a variety of applications, including manufacturing, transportation, and power generation.
The Ward Leonard system consists of two main components: a DC motor, and a DC generator. The DC generator is driven by a separate AC motor, which is connected to a power supply. The DC generator produces a DC voltage that is proportional to the speed of the AC motor.
The DC motor is connected to the load that needs to be controlled, such as a conveyor belt, a pump, or a fan. The DC motor speed is controlled by adjusting the voltage supplied to it by the DC generator. By varying the voltage supplied to the DC motor, the speed of the load can be controlled.
The Ward Leonard system offers several advantages over other types of speed control systems. One of the main advantages is its high accuracy and precision in controlling the speed of the load. Because the DC generator produces a voltage that is proportional to the speed of the AC motor, the speed of the load can be accurately controlled.
Another advantage of the Ward Leonard system is its ability to provide a smooth and gradual acceleration and deceleration of the load. This is because the voltage supplied to the DC motor can be varied gradually, allowing the load to speed up or slow down in a controlled and precise manner.
The Ward Leonard system is also highly efficient, as it does not waste energy in the form of heat. The DC generator converts the AC power from the power supply into DC power, which is then used to power the DC motor. Because the system uses DC power, it is also highly reliable and requires minimal maintenance.
The Ward Leonard system can be used in a variety of applications, including electric trains, cranes, hoists, elevators, and paper mills. In electric trains, the system is used to control the speed of the locomotive, while in cranes and hoists, it is used to control the movement of the load. In elevators, the system is used to control the speed and position of the elevator car, while in paper mills, it is used to control the speed of the paper machines.
In conclusion, the Ward Leonard speed control system is a highly efficient and reliable method for controlling the speed of electric motors. It offers high accuracy, precision, and smooth acceleration and deceleration of the load. It is widely used in a variety of applications and has proven to be a highly effective method for controlling the speed of electric motors.
The Ward Leonard system was first developed in the early 20th century, at a time when electric motors were becoming more prevalent in industrial applications. The system was originally designed to control the speed of electric cranes and hoists, but its use soon spread to other applications.
The basic principle behind the Ward Leonard system is the conversion of AC power into DC power, which is then used to power a DC motor. The DC generator is used to convert the AC power into DC power, and the voltage supplied to the DC motor is controlled by adjusting the field current of the DC generator.
The field current of the DC generator is controlled by a separate control system, which can be a manual or automatic system.
#WardLeonardSpeedControl #HarryWardLeonard #ElectricalControlSystems #DCMotor #DCGenerator #ACMotor #PowerSupply #VoltageRegulation #LoadControl #ConveyorBelts #Pumps #Fans #Accuracy #Precision #GradualAcceleration #GradualDeceleration #Efficiency #EnergyConservation #Reliability #MinimalMaintenance #ElectricTrains #Cranes #Hoists #Elevators #PaperMills #Locomotives #MovementControl #PositionControl #RegenerativeBraking #EnergyConsumption #EnergyProduction #HighTorque #SpeedControl #SpeedVariation #ManualControl #AutomaticControl #FieldCurrent #Rheostat #FeedbackSystem #WideRangeOfSpeedControl #IndustrialApplications #PrintingPresses #PaperMachinery #HeavyMachinery #EquipmentControl #ControlSystems #Engineering #IndustrialEngineering #MechanicalEngineering #ElectricalEngineering #RenewableEnergy #GreenEnergy #Sustainability #PowerManagement #PowerEngineering #Innovation #Technology #EnergyEfficiency #Productivity #Performance #Manufacturing #Construction #Transportation #Logistics #PowerGeneration #ProcessControl #MachineControl #Maintenance #Repair #Safety #Compliance #Standards #QualityControl #Business #Operations #Management #CostEfficiency #Profitability #MarketCompetitiveness #DigitalTransformation #Industry40 #SmartManufacturing #InternetOfThings #BigData #ArtificialIntelligence #MachineLearning
Ward Leonard Speed Control Applications
Ward Leonard speed control is a type of electrical control system that is used to regulate the speed of electric motors. This type of control system is named after its inventor, Harry Ward Leonard, an American electrical engineer. The system is widely used in a variety of applications, including manufacturing, transportation, and power generation.
The Ward Leonard system consists of two main components: a DC motor, and a DC generator. The DC generator is driven by a separate AC motor, which is connected to a power supply. The DC generator produces a DC voltage that is proportional to the speed of the AC motor.
The DC motor is connected to the load that needs to be controlled, such as a conveyor belt, a pump, or a fan. The DC motor speed is controlled by adjusting the voltage supplied to it by the DC generator. By varying the voltage supplied to the DC motor, the speed of the load can be controlled.
The Ward Leonard system offers several advantages over other types of speed control systems. One of the main advantages is its high accuracy and precision in controlling the speed of the load. Because the DC generator produces a voltage that is proportional to the speed of the AC motor, the speed of the load can be accurately controlled.
Another advantage of the Ward Leonard system is its ability to provide a smooth and gradual acceleration and deceleration of the load. This is because the voltage supplied to the DC motor can be varied gradually, allowing the load to speed up or slow down in a controlled and precise manner.
The Ward Leonard system is also highly efficient, as it does not waste energy in the form of heat. The DC generator converts the AC power from the power supply into DC power, which is then used to power the DC motor. Because the system uses DC power, it is also highly reliable and requires minimal maintenance.
The Ward Leonard system can be used in a variety of applications, including electric trains, cranes, hoists, elevators, and paper mills. In electric trains, the system is used to control the speed of the locomotive, while in cranes and hoists, it is used to control the movement of the load. In elevators, the system is used to control the speed and position of the elevator car, while in paper mills, it is used to control the speed of the paper machines.
In conclusion, the Ward Leonard speed control system is a highly efficient and reliable method for controlling the speed of electric motors. It offers high accuracy, precision, and smooth acceleration and deceleration of the load. It is widely used in a variety of applications and has proven to be a highly effective method for controlling the speed of electric motors.
The Ward Leonard system was first developed in the early 20th century, at a time when electric motors were becoming more prevalent in industrial applications. The system was originally designed to control the speed of electric cranes and hoists, but its use soon spread to other applications.
The basic principle behind the Ward Leonard system is the conversion of AC power into DC power, which is then used to power a DC motor. The DC generator is used to convert the AC power into DC power, and the voltage supplied to the DC motor is controlled by adjusting the field current of the DC generator.
The field current of the DC generator is controlled by a separate control system, which can be a manual or automatic system.
#WardLeonardSpeedControl #HarryWardLeonard #ElectricalControlSystems #DCMotor #DCGenerator #ACMotor #PowerSupply #VoltageRegulation #LoadControl #ConveyorBelts #Pumps #Fans #Accuracy #Precision #GradualAcceleration #GradualDeceleration #Efficiency #EnergyConservation #Reliability #MinimalMaintenance #ElectricTrains #Cranes #Hoists #Elevators #PaperMills #Locomotives #MovementControl #PositionControl #RegenerativeBraking #EnergyConsumption #EnergyProduction #HighTorque #SpeedControl #SpeedVariation #ManualControl #AutomaticControl #FieldCurrent #Rheostat #FeedbackSystem #WideRangeOfSpeedControl #IndustrialApplications #PrintingPresses #PaperMachinery #HeavyMachinery #EquipmentControl #ControlSystems #Engineering #IndustrialEngineering #MechanicalEngineering #ElectricalEngineering #RenewableEnergy #GreenEnergy #Sustainability #PowerManagement #PowerEngineering #Innovation #Technology #EnergyEfficiency #Productivity #Performance #Manufacturing #Construction #Transportation #Logistics #PowerGeneration #ProcessControl #MachineControl #Maintenance #Repair #Safety #Compliance #Standards #QualityControl #Business #Operations #Management #CostEfficiency #Profitability #MarketCompetitiveness #DigitalTransformation #Industry40 #SmartManufacturing #InternetOfThings #BigData #ArtificialIntelligence #MachineLearning
Ward Leonard is a global industrial technology company that develops highly engineered motor, generator, control and MRO (maintenance, repair and overhaul) solu...
Ward Leonard is a global industrial technology company that develops highly engineered motor, generator, control and MRO (maintenance, repair and overhaul) solutions for a diverse range of Energy, Heavy Industry and Government customers worldwide. For over 120 years, our products and services have harnessed power to solve complex, mission-critical infrastructure applications, and enabled our customers to achieve benchmark performance, productivity and uptime in the world's most demanding environments.
Ward Leonard is a global industrial technology company that develops highly engineered motor, generator, control and MRO (maintenance, repair and overhaul) solutions for a diverse range of Energy, Heavy Industry and Government customers worldwide. For over 120 years, our products and services have harnessed power to solve complex, mission-critical infrastructure applications, and enabled our customers to achieve benchmark performance, productivity and uptime in the world's most demanding environments.
Ward Leonard control, also known as the Ward Leonard drive system, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In ...
Ward Leonard control, also known as the Ward Leonard drive system, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S. Navy and also used in passenger lifts of large mines. It also provided a solution to a moving sidewalk at the Paris Exposition of 1900, where many others had failed to operate properly. It was applied to railway locomotives used in World War I, and was used in anti-aircraft radars in World War II. Connected to automatic anti-aircraft gun directors, the tracking motion in two dimensions had to be extremely smooth and precise. The MIT Radiation Laboratory selected Ward-Leonard to equip the famous radar SCR-584 in 1942. The Ward Leonard control system was widely used for elevators until thyristor drives became available in the 1980s, because it offered smooth speed control and consistent torque. Many Ward Leonard control systems and variations on them remain in use.
Ward Leonard control, also known as the Ward Leonard drive system, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S. Navy and also used in passenger lifts of large mines. It also provided a solution to a moving sidewalk at the Paris Exposition of 1900, where many others had failed to operate properly. It was applied to railway locomotives used in World War I, and was used in anti-aircraft radars in World War II. Connected to automatic anti-aircraft gun directors, the tracking motion in two dimensions had to be extremely smooth and precise. The MIT Radiation Laboratory selected Ward-Leonard to equip the famous radar SCR-584 in 1942. The Ward Leonard control system was widely used for elevators until thyristor drives became available in the 1980s, because it offered smooth speed control and consistent torque. Many Ward Leonard control systems and variations on them remain in use.
In diesem Video wird die auslaufende Umformer-Technik von Harry Ward Leonard in einer Aufzugssteuerung gezeigt. In einem Ward-Leonard-Umformer treibt ein Primär...
In diesem Video wird die auslaufende Umformer-Technik von Harry Ward Leonard in einer Aufzugssteuerung gezeigt. In einem Ward-Leonard-Umformer treibt ein Primärantrieb einen Gleichstrom-Generator mit konstanter Geschwindigkeit an. Die Regelung der Drehzahl eines angeschlossenen Gleichstrommotors erfolgt über die Veränderung des Erregerstromes am Generator. Dieser Regelungstyp wird heutzutage durch eine Frequenzansteuerung ersetzt und ist deshalb am Aussterben. Besonders filigran ist in dieser Steuerung das Kopierwerk der Fa. OTIS entwickelt. Wie schon der Name aussagt, wird der gesamte Schacht mit seinen Etagen proportional in einem Kopierwerk dargestellt. Alle Einstellungen für die Fahreigenschaften werden hier vorgenommen.
In diesem Video wird die auslaufende Umformer-Technik von Harry Ward Leonard in einer Aufzugssteuerung gezeigt. In einem Ward-Leonard-Umformer treibt ein Primärantrieb einen Gleichstrom-Generator mit konstanter Geschwindigkeit an. Die Regelung der Drehzahl eines angeschlossenen Gleichstrommotors erfolgt über die Veränderung des Erregerstromes am Generator. Dieser Regelungstyp wird heutzutage durch eine Frequenzansteuerung ersetzt und ist deshalb am Aussterben. Besonders filigran ist in dieser Steuerung das Kopierwerk der Fa. OTIS entwickelt. Wie schon der Name aussagt, wird der gesamte Schacht mit seinen Etagen proportional in einem Kopierwerk dargestellt. Alle Einstellungen für die Fahreigenschaften werden hier vorgenommen.
This video is helping you to understand how ward Leonard speed control is work by simple concept 👌
Thanks for watching 😊
#electricalmachines
#infiniteknowled...
This video is helping you to understand how ward Leonard speed control is work by simple concept 👌
Thanks for watching 😊
#electricalmachines
#infiniteknowledge
#electricalengineering
This video is helping you to understand how ward Leonard speed control is work by simple concept 👌
Thanks for watching 😊
#electricalmachines
#infiniteknowledge
#electricalengineering
Vielen Dank für Ihre Unterstützung:
https://amzn.to/2UKHXys
Harry Ward Leonard
Harry Ward Leonard war ein US-amerikanischer Elektroingenieur und Erfinder.Seine 30-jährige Karriere spannte sich vom späten 19.bis in das frühe 20.Jahrhundert.
✪Video ist an blinde Nutzer gerichtet
✪Text verfügbar unter der Lizens CC-BY-SA
✪Bild Quelle im Video
Ward Leonard Speed Control Applications
Ward Leonard speed control is a type of electrical control system that is used to regulate the speed of electric motors. This type of control system is named after its inventor, Harry Ward Leonard, an American electrical engineer. The system is widely used in a variety of applications, including manufacturing, transportation, and power generation.
The Ward Leonard system consists of two main components: a DC motor, and a DC generator. The DC generator is driven by a separate AC motor, which is connected to a power supply. The DC generator produces a DC voltage that is proportional to the speed of the AC motor.
The DC motor is connected to the load that needs to be controlled, such as a conveyor belt, a pump, or a fan. The DC motor speed is controlled by adjusting the voltage supplied to it by the DC generator. By varying the voltage supplied to the DC motor, the speed of the load can be controlled.
The Ward Leonard system offers several advantages over other types of speed control systems. One of the main advantages is its high accuracy and precision in controlling the speed of the load. Because the DC generator produces a voltage that is proportional to the speed of the AC motor, the speed of the load can be accurately controlled.
Another advantage of the Ward Leonard system is its ability to provide a smooth and gradual acceleration and deceleration of the load. This is because the voltage supplied to the DC motor can be varied gradually, allowing the load to speed up or slow down in a controlled and precise manner.
The Ward Leonard system is also highly efficient, as it does not waste energy in the form of heat. The DC generator converts the AC power from the power supply into DC power, which is then used to power the DC motor. Because the system uses DC power, it is also highly reliable and requires minimal maintenance.
The Ward Leonard system can be used in a variety of applications, including electric trains, cranes, hoists, elevators, and paper mills. In electric trains, the system is used to control the speed of the locomotive, while in cranes and hoists, it is used to control the movement of the load. In elevators, the system is used to control the speed and position of the elevator car, while in paper mills, it is used to control the speed of the paper machines.
In conclusion, the Ward Leonard speed control system is a highly efficient and reliable method for controlling the speed of electric motors. It offers high accuracy, precision, and smooth acceleration and deceleration of the load. It is widely used in a variety of applications and has proven to be a highly effective method for controlling the speed of electric motors.
The Ward Leonard system was first developed in the early 20th century, at a time when electric motors were becoming more prevalent in industrial applications. The system was originally designed to control the speed of electric cranes and hoists, but its use soon spread to other applications.
The basic principle behind the Ward Leonard system is the conversion of AC power into DC power, which is then used to power a DC motor. The DC generator is used to convert the AC power into DC power, and the voltage supplied to the DC motor is controlled by adjusting the field current of the DC generator.
The field current of the DC generator is controlled by a separate control system, which can be a manual or automatic system.
#WardLeonardSpeedControl #HarryWardLeonard #ElectricalControlSystems #DCMotor #DCGenerator #ACMotor #PowerSupply #VoltageRegulation #LoadControl #ConveyorBelts #Pumps #Fans #Accuracy #Precision #GradualAcceleration #GradualDeceleration #Efficiency #EnergyConservation #Reliability #MinimalMaintenance #ElectricTrains #Cranes #Hoists #Elevators #PaperMills #Locomotives #MovementControl #PositionControl #RegenerativeBraking #EnergyConsumption #EnergyProduction #HighTorque #SpeedControl #SpeedVariation #ManualControl #AutomaticControl #FieldCurrent #Rheostat #FeedbackSystem #WideRangeOfSpeedControl #IndustrialApplications #PrintingPresses #PaperMachinery #HeavyMachinery #EquipmentControl #ControlSystems #Engineering #IndustrialEngineering #MechanicalEngineering #ElectricalEngineering #RenewableEnergy #GreenEnergy #Sustainability #PowerManagement #PowerEngineering #Innovation #Technology #EnergyEfficiency #Productivity #Performance #Manufacturing #Construction #Transportation #Logistics #PowerGeneration #ProcessControl #MachineControl #Maintenance #Repair #Safety #Compliance #Standards #QualityControl #Business #Operations #Management #CostEfficiency #Profitability #MarketCompetitiveness #DigitalTransformation #Industry40 #SmartManufacturing #InternetOfThings #BigData #ArtificialIntelligence #MachineLearning
Ward Leonard is a global industrial technology company that develops highly engineered motor, generator, control and MRO (maintenance, repair and overhaul) solutions for a diverse range of Energy, Heavy Industry and Government customers worldwide. For over 120 years, our products and services have harnessed power to solve complex, mission-critical infrastructure applications, and enabled our customers to achieve benchmark performance, productivity and uptime in the world's most demanding environments.
Ward Leonard control, also known as the Ward Leonard drive system, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S. Navy and also used in passenger lifts of large mines. It also provided a solution to a moving sidewalk at the Paris Exposition of 1900, where many others had failed to operate properly. It was applied to railway locomotives used in World War I, and was used in anti-aircraft radars in World War II. Connected to automatic anti-aircraft gun directors, the tracking motion in two dimensions had to be extremely smooth and precise. The MIT Radiation Laboratory selected Ward-Leonard to equip the famous radar SCR-584 in 1942. The Ward Leonard control system was widely used for elevators until thyristor drives became available in the 1980s, because it offered smooth speed control and consistent torque. Many Ward Leonard control systems and variations on them remain in use.
In diesem Video wird die auslaufende Umformer-Technik von Harry Ward Leonard in einer Aufzugssteuerung gezeigt. In einem Ward-Leonard-Umformer treibt ein Primärantrieb einen Gleichstrom-Generator mit konstanter Geschwindigkeit an. Die Regelung der Drehzahl eines angeschlossenen Gleichstrommotors erfolgt über die Veränderung des Erregerstromes am Generator. Dieser Regelungstyp wird heutzutage durch eine Frequenzansteuerung ersetzt und ist deshalb am Aussterben. Besonders filigran ist in dieser Steuerung das Kopierwerk der Fa. OTIS entwickelt. Wie schon der Name aussagt, wird der gesamte Schacht mit seinen Etagen proportional in einem Kopierwerk dargestellt. Alle Einstellungen für die Fahreigenschaften werden hier vorgenommen.
This video is helping you to understand how ward Leonard speed control is work by simple concept 👌
Thanks for watching 😊
#electricalmachines
#infiniteknowledge
#electricalengineering
Harry Ward Leonard (February 8, 1861 – February 18, 1915) was an electrical engineer and inventor. He is best known for his invention, the Ward Leonard motor control system. Equipment based on this invention remained in service into the 21st century.
Early life and heritage
Harry was born on February 8, 1861 in Cincinnati, Ohio to Ezra George Leonard and Henrietta Dana Ward. He was the fourth of their six children. He was a great great grandson of American Revolutionary War General Artemas Ward. Although his surname was evidently “Leonard” and not “Ward-Leonard,” he apparently identified himself as either Harry Ward Leonard or H. Ward Leonard. In 1895, Harry was married to Carolyn Good in Geneva, Switzerland.
As a student at the Massachusetts Institute of Technology (MIT), Harry was instrumental in founding the student newspaper, The Tech, and served as the president of the paper’s board of directors. He graduated from MIT in 1883.
Career
After graduating from MIT, Mr. Leonard was employed by Thomas Edison to help introduce the Edison central-station electric power distribution system. Within four years, he was promoted to the position of general superintendent of the Western Electric Light Company of Chicago, Illinois. The following year, he established Leonard and Izard, a firm that set up electric railways and generating stations. In 1889, his firm was acquired by Edison and Leonard became the general manager of the Edison operations in the United States and Canada. In 1896, Leonard organized and became president of Ward Leonard Electric as an Edison company in Hoboken, New Jersey. In 1898, Mr. Leonard left the Edison organization and incorporated his own Ward Leonard Electric Company on February 19, 1898 in the village of Bronxville in Westchester County, New York.