ACV 700 Frequency Converters

This manual describes the ACV 700 drive system to the application

engineers and other persons involved with ACV 700.

The drive has a multidrive configuration. It consists of a supply

section including connection devices (main fuses and main contactor

or circuit breaker), rectifier devices (a diode or thyristor bridge),

capacitors for smoothing of the DC voltage, optional devices, if

specified, and a number of drive sections.

The power range for the supply sections is 40 - 2500 kVA and the

power range for the drive sections is 9 - 2500 kVA.

Depending on the required power and voltage, the drive sections are

based on either an IGBT or GTO thyristor power stage.

The control system is implemented by using the Common Drive

Control, CDC, and the Digital Drive Control, DDC. The basic part of

the CDC is the Application Controller, the APC.

The APC is designed to give a flexible, compact and efficient system

for controlling AC or DC drives. The APC is programmable by using

function blocks.

The DDC performs the inverter control functions.

Programming can be done using two alternative tools, the Function

Chart Editor, FCE or the AdvaBuild for Windows, the Drives version.

Various drive configurations are possible using one or multiple APCs

and their communication capabilities.

In small systems one APC is connected to up to four Digital Drive

Controllers (DDC). The drive configuration can be used in master/

follower applications when the master drive is of moderate complexity

and the followers fairly simple. A consequence of multiplexing is that

the performance of the drive controller interface decreases.

Figure 1 - 1 Small drive system.

In distributed multicontroller systems, several APCs are interconnected

by Advant Fieldbus 100 (AF100). Common control functions

can be distributed to separate nodes. No overriding automation system

is used in this configuration, but one or several application controllers

can communicate with external systems over communication

boards.

A personal computer (PC) can be connected through one of the

APCs and can be used for tool functions

Motor Connection

Voltage, 3 phase: 0 - 105 %UN

Frequency: 0 to ± 200 Hz

Frequency resolution: 0.01 Hz

Static speed control accuracy

with pulse encoder feedback: 0.01 %

without feedback (motor slip): 0.5 - 3 %, can be reduced by slip compensation

Dynamic speed control accuracy: 0.2 - 0.3 % sec at 100 % load step

Load capacity

Continuous: Refer to tables in section 10, inverter sections

Overload: Refer to tables in section 10, inverter sections

Switching frequency

IGBT-inverters: 3 kHz max.

GTO-inverters: 800 Hz max.

Field weakening set point range

Frequency: 10 - 200 Hz

Voltage: 0 - 105 %

Torque step rise time: 5 to 10 ms at 100 % torque reference step (vector

control)

Acceleration time: 200 ms - 600 sec. / 100 Hz

Deceleration time: 200 ms - 600 sec. / 100 Hz

The concept of the control system is called Common Drive Control,

CDC.

The standard control functions of the drive section, such as speed

and torque control, are located in the Digital Drive Controller, DDC.

The application dependent control functions are located in the

Application Controller, APC.

Typical APC functions are section start and stop logic, internal and

external interlocking, speed reference chain, load share control,

drive-specific settings, logger functions, and system communication.

Function blocks can be combined to macro blocks, which can

perform application specific tasks such as crane control, lever

control, remote panel control, etc.

Each APC can control up to four DDCs. The APC is usually located in

the drive section.

The APC communicates with other APCs and with the centralised

operator control devices via the AF100 communication bus.

The APC and the DDC communicate via an optic fibre link. If the

solution includes more than one DDC, an optic distributor board is

needed.

APC is designed to give a flexible, compact and efficient system for

controlling AC- and DC-drives. APC is programmed by using function

blocks.

APC can be supplied with unstable + 24 VDC voltage (connector X1)

that can vary in the range 19 - 30 VDC. Maximum input power

consumption is 15 VA (0.63 A at 24 VDC). This power consumption

includes 2 optional communication boards. APC can handle power

supply failure with max. duration of 5 ms (i.e. voltage is below 19 V).

When the APC board is slid into the CDC board rack, a 64 pole

parallel bus (connector X8) on APC slides into the CDC board rack

bus connector.

AdvantFieldBus 100 (AF 100) is a high speed serial bus (connector

X6), which is used for communication between APCs or between an

APC and an overriding system such as ABB's MasterPiece 90. The

communication board YPK 112A is used to connect the APC to the

AF 100.

RS-485 bus, a 8 pole screw terminal connector X2, is a low speed

serial bus, which is used to connect remote I/O devices and control

panels to the APC. Also other APCs can be connected to each other

via this bus. The bus has to be grounded at one point to the same

ground as the APC. Maximum length of the bus is 300 m.

PC-Link, a standard 9 pole female D-connector X4, can be used to

connect a personal computer to the APC. Physical interface is a

standard non isolated RS-232C (V24) without any handshaking