Name: DIGIFAS 7202 Kollmorgen 3x400V 1,7 kVA
Price: 2355 CNY
Availability: InStock

Description

1. Concept

Digital servo amplifier

2. Operation and Parameter Setting

Via the parallel interface of a PC using the special operator software BS7200

3. Power Section

Mains Supply: B6 bridge rectifier with current inrush limiter, directly connected to the 3-phase 400V mains
Output Stage: IGBT-module with electrically isolated current measurement
Ballast Circuit: With electronic monitoring and internal ballast resistor

4. Digital Functions

Current and speed control
Processing of the 14-bit resolver evaluation
Position output (incremental or SSI) with analog setpoint input
Communication with various interface modules and positional control (if an interface module is installed)

5. Easy-to-Use Functions

Adjustable setpoint ramps
Limit-switch function
Analog monitor outputs

6. Operation Directly Off a 400V Mains (I.5.3)

6.1 Power Supply

Directly connected to a 3-phase 400V mains without a transformer; mains filter series 3EFxx
Fuse protection and phase-failure monitoring to be provided by the user
Single-phase supply (only for power < 0.5kW) – e.g., for commissioning or setup purposes

6.2 Auxiliary Supply

Electrically isolated, from an external 24V DC power supply or 25V DC with an isolating transformer (mains filter 1EF06)
At the instant of switching on, the power supply must provide twice the rated current for a short time to enable the power sections to start up the connected servo amplifiers

6.3 Intrinsic Safety

Electrically safe isolation complying with VDE 0160 (proposed EN 50178) between the mains/motor connection and the signal electronics, achieved via appropriate creepage distances and full electrical isolation
Soft start, overvoltage detection, and short-circuit protection
Temperature monitoring of the servo amplifier and motor (when using motors from the 6SM series with preassembled cables)

7. Ballast Circuit

When the motor is braking, energy is fed back to the servo amplifier and converted into heat in the ballast resistor. The ballast resistor is activated by the ballast circuit.The maximum ballast power depends on the installed ballast resistor and the ballast power set in the software.For assistance with dimensioning the required ballast power for your system, please contact our applications department.

8. Functional Description

8.1 Single Amplifier (Not Coupled Via the Intermediate Circuit [DC+, DC-])

The circuit activates when the intermediate circuit voltage reaches 720V
If the regenerative power from the motor exceeds the set ballast power level, the servo amplifier signals the status “Ballast power exceeded” and the ballast circuit shuts off
At the next internal intermediate circuit voltage check (a fraction of a second later), an overvoltage is detected, and the controller shuts off with the error message “Overvoltage” (see Chapter II.5)

8.2 Multiple Servo Amplifiers (Coupled Via the Intermediate Circuit [DC+, DC-])

Regenerative energy from all motors is dissipated by all connected ballast resistors; the servo amplifier with the lowest ballast switch-on threshold (due to tolerances) activates first
If the regenerative power is lower than the ballast power of this servo drive, the intermediate circuit voltage stabilizes, and no other servo amplifiers activate
If the ballast power is insufficient, the servo amplifier signals “Ballast power exceeded”; the intermediate circuit voltage rises further, and the ballast circuit with the next higher threshold activates, and so on
If the total regenerative power exceeds the sum of all ballast powers, all servo amplifiers signal “Ballast power exceeded”
The servo drive with the lowest overvoltage threshold (per tolerance) shuts off with the error message “Overvoltage” and switches off the complete system via the BTB contact

DIGIFAS 7202 PDF
DIGIFAS 7202

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