| Applications | Shipping Mechanical engineering & Plant construction Energy |
| Operating speed (electrical), max. | 3,000 to 10,000 U/min |
| Accuracy (%) | 1 % |
| Output voltage at (1000 rpm) | 20 to 63 V |
Tacho generators
A tachogenerator is an electrical device used to measure the speed of rotating objects. Tachogenerators are used in many applications, including the automotive, aerospace, medical and industrial automation industries.
A tachogenerator consists of a rotating magnet or coil connected to the rotating shaft and a fixed coil or magnet which generates the electromagnetic signal when the rotating magnet or coil moves. The signal generated is proportional to the speed and can be converted to an electrical voltage or signal representing the measured speed.
There are several types of tachogenerators based on different measurement principles. Some generators use a rotating magnetic field coil and a fixed induction coil to measure the speed of a rotating object. Other generators use magnetic effects such as Hall sensors or magnetoresistive sensors to measure speed.
The accuracy and sensitivity of a tachogenerator depends on several factors such as the size and type of the rotor magnet or coil, the sensitivity of the stationary coil or magnet, the speed and the speed measurement range. Some tachogenerators have high sensitivity and accuracy, but can be sensitive to noise and vibration. Other generators are more robust and stable, but have lower resolution and sensitivity. The choice of tachogenerator depends on the application and the requirements for accuracy and stability of the measurement.
A tachogenerator consists of a rotating magnet or coil connected to the rotating shaft and a fixed coil or magnet which generates the electromagnetic signal when the rotating magnet or coil moves. The signal generated is proportional to the speed and can be converted to an electrical voltage or signal representing the measured speed.
There are several types of tachogenerators based on different measurement principles. Some generators use a rotating magnetic field coil and a fixed induction coil to measure the speed of a rotating object. Other generators use magnetic effects such as Hall sensors or magnetoresistive sensors to measure speed.
The accuracy and sensitivity of a tachogenerator depends on several factors such as the size and type of the rotor magnet or coil, the sensitivity of the stationary coil or magnet, the speed and the speed measurement range. Some tachogenerators have high sensitivity and accuracy, but can be sensitive to noise and vibration. Other generators are more robust and stable, but have lower resolution and sensitivity. The choice of tachogenerator depends on the application and the requirements for accuracy and stability of the measurement.
What is a tachogenerator and what is it used for?
A tachogenerator is an electrical device used to measure the rotational speed or velocity of a rotating shaft. It consists of a magnet and a coil that move relative to each other. When the shaft rotates, the magnet generates a magnetic field that cuts through the coil and generates an electrical voltage. The amount of voltage generated depends on the speed of the shaft.
Tachogenerators are used in various applications where accurate measurement of speed or velocity is required. They are often used in machines and systems to monitor performance and efficiency. Tachogenerators are used in vehicles to measure the speed of the vehicle and display it on the speedometer. They are also used in control systems to monitor and adjust the speed of motors.
Tachogenerators are used in various applications where accurate measurement of speed or velocity is required. They are often used in machines and systems to monitor performance and efficiency. Tachogenerators are used in vehicles to measure the speed of the vehicle and display it on the speedometer. They are also used in control systems to monitor and adjust the speed of motors.
How does a tachogenerator work and what physical principles are used?
A tachogenerator is a device that is used to measure the rotational speed of a shaft. It consists of a permanent magnet and a coil that move relative to each other.
The physical principle used here is the law of electromagnetic induction. When the permanent magnet moves relative to the coil, a voltage is induced in the coil. The magnitude of this voltage is directly proportional to the speed of the rotary movement.
The tachogenerator therefore works on the principle of a generator. The movement of the magnet generates a changing magnetic field, which in turn generates an electrical voltage in the coil. This voltage can then be measured and used to determine the rotational speed.
The physical principle used here is the law of electromagnetic induction. When the permanent magnet moves relative to the coil, a voltage is induced in the coil. The magnitude of this voltage is directly proportional to the speed of the rotary movement.
The tachogenerator therefore works on the principle of a generator. The movement of the magnet generates a changing magnetic field, which in turn generates an electrical voltage in the coil. This voltage can then be measured and used to determine the rotational speed.
What types of tachogenerators are there and what are the differences between them?
There are different types of tachogenerators, which can be differentiated according to their operating principle:
1. Direct current tachogenerator: This type generates a direct current voltage that is proportional to the rotation speed of the generator. The rotor consists of permanent magnets, while the stator has a winding. Voltage is supplied via sliding contacts or brushes.
2. Alternating current tachogenerator: With this type, an alternating current voltage is generated which is also proportional to the rotational speed. The rotor consists of permanent magnets or a magnetized metal disc, while the stator has a winding.
3. Inductive tachogenerator: This type uses the principle of electromagnetic induction to generate a voltage. The rotational movement of the rotor changes the magnetic field that penetrates the winding in the stator, thus generating an induced voltage.
The differences between the various types of tachogenerators lie mainly in their operating principle and the types of voltage generated (direct current or alternating current). DC tachogenerators are often used for applications where precise speed measurement is required, while AC tachogenerators can be used in applications that require high torque performance. Inductive tachogenerators are generally less expensive and can be used in various applications, but may be less accurate than the other two types.
1. Direct current tachogenerator: This type generates a direct current voltage that is proportional to the rotation speed of the generator. The rotor consists of permanent magnets, while the stator has a winding. Voltage is supplied via sliding contacts or brushes.
2. Alternating current tachogenerator: With this type, an alternating current voltage is generated which is also proportional to the rotational speed. The rotor consists of permanent magnets or a magnetized metal disc, while the stator has a winding.
3. Inductive tachogenerator: This type uses the principle of electromagnetic induction to generate a voltage. The rotational movement of the rotor changes the magnetic field that penetrates the winding in the stator, thus generating an induced voltage.
The differences between the various types of tachogenerators lie mainly in their operating principle and the types of voltage generated (direct current or alternating current). DC tachogenerators are often used for applications where precise speed measurement is required, while AC tachogenerators can be used in applications that require high torque performance. Inductive tachogenerators are generally less expensive and can be used in various applications, but may be less accurate than the other two types.
What are the advantages of using tachogenerators compared to other speed sensors?
The use of tachogenerators offers several advantages compared to other speed sensors:
1. Direct measurement: Tachogenerators measure speed directly by detecting the rotation of a mechanical part. As a result, they provide accurate and reliable measurements.
2. Independent of the power supply: Tachogenerators generate their own power supply through the rotation of the mechanical part. This means they are independent of external power sources and can also be used in environments where no power supply is available.
3. Real-time measurement: Tachogenerators provide continuous real-time speed measurements. They can react quickly to changes in speed and can therefore be used for applications that require fast and precise speed control.
4. Robustness: Tachogenerators are generally robust and durable. They can be used in environments with high temperatures, vibrations or other adverse conditions without compromising their performance or accuracy.
5. Costs: Tachogenerators are often less expensive than other speed sensors such as optical sensors. They offer a cost-effective solution for applications where precise speed measurement is required.
Overall, tachogenerators offer a reliable, accurate and cost-effective solution for measuring speed in various applications, such as in mechanical engineering, the automotive industry or robotics.
1. Direct measurement: Tachogenerators measure speed directly by detecting the rotation of a mechanical part. As a result, they provide accurate and reliable measurements.
2. Independent of the power supply: Tachogenerators generate their own power supply through the rotation of the mechanical part. This means they are independent of external power sources and can also be used in environments where no power supply is available.
3. Real-time measurement: Tachogenerators provide continuous real-time speed measurements. They can react quickly to changes in speed and can therefore be used for applications that require fast and precise speed control.
4. Robustness: Tachogenerators are generally robust and durable. They can be used in environments with high temperatures, vibrations or other adverse conditions without compromising their performance or accuracy.
5. Costs: Tachogenerators are often less expensive than other speed sensors such as optical sensors. They offer a cost-effective solution for applications where precise speed measurement is required.
Overall, tachogenerators offer a reliable, accurate and cost-effective solution for measuring speed in various applications, such as in mechanical engineering, the automotive industry or robotics.
How are tachogenerators calibrated and what factors can influence their accuracy?
Tachogenerators are usually calibrated by comparison with a known speed. The tachogenerator is connected to a rotating shaft and the output voltage of the generator is compared with a reference speed. This allows the scale of the tachogenerator to be adjusted accordingly.
The accuracy of a tachogenerator can be influenced by various factors. These include:
1. Mechanical deviations: If the rotating shaft to which the tachogenerator is attached exhibits irregularities or is not precisely aligned, this can lead to measurement errors.
2. Temperature: Changes in the ambient temperature can affect the accuracy of the tachogenerator. This is because the electrical attributes of materials can change with temperature.
3. Wear and tear: Over time, the mechanical parts of the tachogenerator may show signs of wear, which can lead to measurement inaccuracies.
4. Electrical faults: Electrical disturbances such as interference or interference from other electrical devices can affect the accuracy of the tachogenerator.
5. Calibration: Inaccurate calibration of the tachogenerator can lead to measurement errors. It is therefore important to calibrate the tachogenerator regularly to ensure high accuracy.
To improve the accuracy of a tachogenerator, it is important to take these factors into account and, if necessary, take appropriate measures, such as regular maintenance and calibration.
The accuracy of a tachogenerator can be influenced by various factors. These include:
1. Mechanical deviations: If the rotating shaft to which the tachogenerator is attached exhibits irregularities or is not precisely aligned, this can lead to measurement errors.
2. Temperature: Changes in the ambient temperature can affect the accuracy of the tachogenerator. This is because the electrical attributes of materials can change with temperature.
3. Wear and tear: Over time, the mechanical parts of the tachogenerator may show signs of wear, which can lead to measurement inaccuracies.
4. Electrical faults: Electrical disturbances such as interference or interference from other electrical devices can affect the accuracy of the tachogenerator.
5. Calibration: Inaccurate calibration of the tachogenerator can lead to measurement errors. It is therefore important to calibrate the tachogenerator regularly to ensure high accuracy.
To improve the accuracy of a tachogenerator, it is important to take these factors into account and, if necessary, take appropriate measures, such as regular maintenance and calibration.
What modern developments have improved the performance and reliability of tachogenerators?
There are several modern developments that have improved the performance and reliability of tachogenerators:
1. Improved materials: The use of high-quality materials such as neodymium magnets and special alloys enables higher performance and reliability of the tachogenerators.
2. Advances in manufacturing technology: Modern manufacturing techniques enable more precise production of tachogenerators, resulting in better performance and reliability.
3. Miniaturization: By miniaturizing components, tachogenerators can be made smaller and lighter without sacrificing performance and reliability.
4. Improved electronic components: The use of high-quality electronic components such as Hall sensors enables more precise speed measurement and therefore better performance and reliability of the tachogenerators.
5. Digitization: The integration of digital signal processing techniques enables more precise and reliable speed measurement and better performance of the tachogenerators.
All in all, these modern developments have contributed to making tachogenerators more powerful and reliable than ever before.
1. Improved materials: The use of high-quality materials such as neodymium magnets and special alloys enables higher performance and reliability of the tachogenerators.
2. Advances in manufacturing technology: Modern manufacturing techniques enable more precise production of tachogenerators, resulting in better performance and reliability.
3. Miniaturization: By miniaturizing components, tachogenerators can be made smaller and lighter without sacrificing performance and reliability.
4. Improved electronic components: The use of high-quality electronic components such as Hall sensors enables more precise speed measurement and therefore better performance and reliability of the tachogenerators.
5. Digitization: The integration of digital signal processing techniques enables more precise and reliable speed measurement and better performance of the tachogenerators.
All in all, these modern developments have contributed to making tachogenerators more powerful and reliable than ever before.
How can tachogenerators be used in combination with other sensors to control speed and position?
Tachogenerators can be used in combination with other sensors to control speed and position. Here are some ways in which this can be achieved:
1. Speed control: A tachogenerator can be used to measure the current speed of a motor or machine. This information can then be compared with a target speed to enable the speed to be regulated. In conjunction with a controller, the tachogenerator can adjust the speed to maintain the target speed.
2. Position control: By combining a tachogenerator with a position sensor such as an encoder, the exact position of a machine or system can be determined. This information can then be used to control the position and ensure that it returns exactly to a predetermined position. The tachogenerator can help to detect deviations from the target position and adapt the control process.
3. Control of speed and position: By combining tachogenerators with other sensors such as encoders or gyroscopes, both the speed and the position of a system can be controlled. By using feedback loops and control algorithms, the output signals from the sensors can be used to adjust and control the speed and position accordingly.
Overall, tachogenerators in combination with other sensors offer a versatile way of controlling the speed and position of machines and systems. By accurately measuring and feeding back the current values, they can help to achieve precise and stable control.
1. Speed control: A tachogenerator can be used to measure the current speed of a motor or machine. This information can then be compared with a target speed to enable the speed to be regulated. In conjunction with a controller, the tachogenerator can adjust the speed to maintain the target speed.
2. Position control: By combining a tachogenerator with a position sensor such as an encoder, the exact position of a machine or system can be determined. This information can then be used to control the position and ensure that it returns exactly to a predetermined position. The tachogenerator can help to detect deviations from the target position and adapt the control process.
3. Control of speed and position: By combining tachogenerators with other sensors such as encoders or gyroscopes, both the speed and the position of a system can be controlled. By using feedback loops and control algorithms, the output signals from the sensors can be used to adjust and control the speed and position accordingly.
Overall, tachogenerators in combination with other sensors offer a versatile way of controlling the speed and position of machines and systems. By accurately measuring and feeding back the current values, they can help to achieve precise and stable control.