Manuals / Delta Tau / Home Audio / Stereo Amplifier

Delta Tau 3Ax-602646-xUxx Current Sense Board, Firing Boards, Soft Start and Shunt Regulator

Models: 3Ax-602646-xUxx

1 40
Download 40 pages 54.64 Kb
Page 16
Image 16

Quad Amp Hardware Reference Manual

Current Sense Board

The Current Sense Board has eight Hall Effect (LEM) modules for current sense and eight on-board A/D converters that transform four channels of motor current to digital form. Each channel provides information on two phases (A phase and B phase). The third phase is mathematically created in the PMAC2.

Firing Boards

The firing boards receive their signals directly from the PMAC2 through the Logic board differential receivers and turn appropriate top and bottom IGBT on to allow current flow through a motor phase (winding). The PWM signals are opto-isolated before they reach the IGBT firing pins. The firing pulses for each IGBT transistor are differential to increase noise immunity. To avoid ground loops and accidental IGBT turn-on, each firing board is equipped with an isolated power supply.

Soft Start and Shunt Regulator

The Soft Start and Shunt Regulator circuit board’s function is to provide soft charge and shunt regulation for the Quad Amplifier. It consists of a main board (602800-1) and a dual split gate drive power supply piggy board (602801-1) that mounts on the main board with plastic screws and standoffs.

The Soft Start and Shunt Regulator Main and Shunt set points (when main IGBT and shunt IGBT turn on) are set as a percentage of the nominal bus voltage for the actual AC line voltage. Therefore, set points move automatically with the line voltage. This allows operation at any line voltage above 30 VAC and prevents shunt damage under high line conditions. A condition above 250/500 VAC will cause a high line fault, which will prevent operation of the Quad Amplifier. Over voltage is set at 410/820 VDC and can be factory set lower with R2.

If there is an absence of logic power (+/- 15V), the split gate drive power supply will not be able to power the K1 relay and bus voltage is prevented from coming up because the main and soft start IGBT gates and emitters are shorted via the K1 relay (NC) contacts.

Soft Start

If there is no 3-phase line voltage (VAC) present, a No Line fault condition prevents momentary main operation on power-up before line sense levels are up. Once 3-phase line voltage is applied, the No Line fault is cleared by a clear fault pulse, which comes from Quad Amplifier logic board upon issuing an Enable command. When Enable is issued, the Soft Start IGBT will turn on and charge the bus capacitors via Soft Start resistor (100 Ohm, 50 Watts). After the bus capacitors are charged to 80% of the nominal bus voltage for the AC line, the main IGBT will turn on, bypassing the Soft Start resistor.

Shunt Regulator

When the bus voltage rises to 114 % of the nominal bus voltage for the AC line due to a deceleration of a motor, the shunt IGBT turns on and connects the shunt resistor across the bus until the bus voltage drops to normal. The value of 114% was selected so that even at 250 VAC (about 353 VDC bus) the shunt regulator will turn on at approximately 400 VDC before the over voltage (410VDC) trips.

DC Bus Power Supply

The AC Input voltage from L1, L2, and L3 is rectified into a DC bus voltage. The DC Bus Power Supply consists of a three-phase rectifier bridge and an IGBT switch. The 208/230 VAC amplifier has a 15 k Ohm bleeding resistor and six 1,800 ∝F filter capacitors, connected in parallel. The 380/460V Quad Amplifier utilizes a serial/parallel configuration of six filter capacitors and two 15 k Ohm bleeder resistors in series across + Bus and – Bus.

12

Theory of Operation

Page 15 Page 17
Page 16
Image 16
Delta Tau 3Ax-602646-xUxx manual Current Sense Board, Firing Boards, Soft Start and Shunt Regulator, DC Bus Power Supply
Page 15 Page 17

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.