ABB GDB021BE05 HIEE300766R0005 CPU module interface board

Description

Improved regulator

• The P- and I-parts of the speed regulator are adjusted separately, which by experience has been

found better for Start-up tuning and motion performance.

• The I-memory of the speed regulator is reset to zero when any speed reference ramp has reached

the requested value. The classical problem with under-/overshooting due to the principle of reversi

ble phase control is now eliminated. It is possible to include I-part of the gain for most motions, also

Travel motions.

• The transition from Open Control state or Super-synchronous mode back to the speed-regulated

mode is made invisible for the driver, and with low peak current impact, which saves the electrical

and mechanical equipment. Further improvements to better control backlash in the drive system is

made in 10_05.

For Travels in both directions and Hoists in hoisting direction the speed control loop is disconnected, and

the motor is fed with sinusoidal voltage.

When leaving Open Control the controller moves from a non-linear mode with full line voltage on the motor

to a speed controlled mode. The motor voltage is forced to a very low value at this stage, and is after that

softly reapplied until the motor voltage corresponds to what is needed to maintain the ordered speed. Pa

rameters 11.45 and 11.46 are used for this purpose. In this way the controller will give a very soft action

even in the case the drive system contains backlash.

The conditions to enter this state are:

• The speed reference is larger than parameter 09.27. Normally the standard value 85% shall not be

changed.

• ASTAT is already applying full voltage to the motor

The open control state is ended when:

• A slow-down or stop limit switch is hit
• When the driver notches back so the speed reference is slower than the speed feedback
• In case rotor frequency feedback is used the state is ended as soon as the speed reference is

slower than parameter 09.27

Details: If you need an urgent delivery order, please feel free to contact us, and we will do our best to meet your needs.
Price issue: If you find that other suppliers offer a cheaper price for the same product, we are also willing to provide you with a reference price and give you further discounts.
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Contact Person: Chen

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