AMX AXD-CP4/PB Especificaciones descargar pdf (Pagina 179)

Velocity Drive Setup Ver. 0002 SSU - 7

Tek Hold: 2.5kS/s 130 Acqs --.-- k

Ω

Ch2 2 VCh1 2 V 100ms Ch 1 -1.08 V

Actual

Velocity

Command

Period: 160 ms (6.25 Hz)

Amplitude: 600 rpm

SSU.5 VELOCITY LOOP SETTING

The next step consists in adjusting the velocity loop. To do this:

- We will use the internal velocity command generator of the drive itself.

- We will adjust the PI of the velocity loop.

- We can filter this command using the acceleration limit and/or the choke.

The next sections describe these steps in detail.

SSU.5.1 VELOCITY COMMAND GENERATOR

This function generates velocity commands internally. When activated, the drive ignores the

analog signal coming from the outside. This function can be used for moving the system with

known analog voltages and, then, monitor their behavior.

It can generate two types of signals: square and DC. Their frequency and amplitude are

programmable. The squarewave is commonly used to see how the system reacts when

faced with a step. For example:

WV4=1 Activates the internal generator. Velocity command.

WV1=1 Squarewave.

WV2=160 Period of 160ms (6.26 Hz)

WV3=600 Amplitude of the velocity command corresponding to 600 rpm.

... and after adjusting the PI and the filter described in the next sections...

WV4=0 Deactivates the internal generator.

The motor will turn trying to follow the programmed velocity command.

This command can be used for adjusting the velocity loop.

By programming the analog outputs to be able to observe variables WV5 and SV2

(Oscilloscope mode) we would obtain on the screen a graph similar to this one:

1 2 ... 174 175 176 177 178 179 180 181 182 183 184 ... 363 364

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AMX AXD-CP4/PB Especificaciones Pagina 179