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Delta Tau 3Ax-602646-xUxx manual Heat Dissipation, Shunt Considerations

Models: 3Ax-602646-xUxx

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Quad Amp Hardware Reference Manual

Heat Dissipation

The capability of the Quad Amplifier and the IGBT modules is based upon the heat they can dissipate; the more quickly heat can be removed from the IGBT module, the more current it can handle. Heat is created whenever an IGBT is turned on or off. These transitions are called switching losses. Whenever current is flowing, the switching losses represent a sizable and unavoidable part of the heat generated by the Quad Amplifier. Since the switching losses occur on transitions and the transitions are a function of frequency, a lower PWM frequency can mean a cooler amplifier capable of more power and a higher PWM frequency will result in more heat and less overall deliverable power to the motor.

Of course, simply lowering the PWM frequency will not produce optimal results on all motors. Low inductance motors, for instance, require a higher frequency. In addition, high frequency PWM can reduce velocity ripple on small motors. The choice of a PWM frequency is application dependent and entirely programmable on the Delta Tau Digital Amplifier. Similarly, this facility must be taken into consideration when choosing a power rating for your application.

Shunt Considerations

CAUTION:

The Quad Amplifier has an internal shunt regulator with dumping resistors. These are not sized for a particular load and may not be adequate for any particular application. These internal shunt resistors are nominally capable of dumping 25 amps at low duty cycle (<25%). If the application has a high duty cycle or requires more shunt dumping, an external shunt resistor will be necessary.

Depending upon the application, a shunt regulator is often necessary to dissipate the energy regenerated into the DC bus by the stored kinetic energy of the motor and reflected load, during deceleration. The components in the amplifier are rated for 410VDC/820VDC respectively. When the motor with load decelerates, it can act as a generator, pumping current back into the DC bus instead of from it, thereby raising the bus DC voltage. This problem is magnified for large spindle or high inertia applications that must be brought to a halt in a very short time. Care must be taken to see that DC bus voltage does not exceed 410VDC/820VDC. If DC bus voltage exceeds 410VDC/820VDC, nuisance over voltage may occur and the amplifier could be damaged.

To prevent this, the shunt should be able to draw as much current from the DC bus as the motors are capable of putting into it. The faster the motors are decelerated the greater the current. A spindle motor using 60 amps continuously will require a shunt that can dump at least that much current. Refer to the Delta Tau Soft Start and Shunt Resistor circuit board section of this manual for more information.

Theory of Operation

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Delta Tau 3Ax-602646-xUxx manual Heat Dissipation, Shunt Considerations
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3Ax-602646-xUxx specifications

Delta Tau 3Ax-602646-xUxx is a cutting-edge motion controller designed for precision applications in automation and robotics. This model exemplifies advanced technology and innovative design, catering to industries ranging from manufacturing to aerospace. One of the key features of the Delta Tau 3Ax-602646-xUxx is its capability to control three axes simultaneously, allowing for synchronous motion that is critical in high-speed applications.

At the core of its functionality is its robust processing unit, which supports high-speed data handling and complex algorithms for motion control. This allows the user to achieve precise positioning and trajectory control, essential for tasks such as CNC machining or robotic arms. The controller operates with real-time feedback, ensuring that any deviations in motion are corrected instantly, thereby enhancing reliability and performance.

The Delta Tau 3Ax-602646-xUxx incorporates a user-friendly interface, which simplifies the programming of motion sequences. Its compatibility with various programming languages and protocols such as C, C++, and PLC languages makes it an adaptable choice for engineers. Furthermore, it supports a range of standard communication protocols, enabling seamless integration with existing systems and devices.

One of the standout technological features of this controller is its adaptive control strategy. This allows the system to learn from past operations and adjust its parameters to optimize performance, making it suitable for applications that require high levels of precision and repeatability. The Delta Tau 3Ax-602646-xUxx also utilizes advanced algorithms for PID control, ensuring smooth acceleration and deceleration, which is vital for maintaining component integrity in delicate manufacturing processes.

Another significant characteristic is its ability to interface with a variety of sensors and feedback devices, providing enhanced environmental awareness. This feature significantly boosts the controller's versatility as it can adapt to different machinery and operational challenges easily. Additionally, the system is designed to be scalable, accommodating future upgrades or expansions, thus offering long-term investment value for businesses.

In summary, the Delta Tau 3Ax-602646-xUxx is a powerful motion controller that combines precision, versatility, and advanced technology. Its simultaneous axis control, robust processing capabilities, user-friendly interface, and adaptive features make it an essential tool for modern automation and robotics applications, ensuring high levels of efficiency and productivity.