Toshiba TOSVERT VF-AS1 Brochure & Specs page 4

For machinery that reguires high torque and a large capacity
This makes it ideals for cranes, mining machinery, refrigerator, presses,
compressers, crushing machine and other machinery that require a high
torque and large capacity.
*1: Photos of machinery are for illustrative purposes only.
Excellent Motor Control Performance
Point
5
• Motor constants required for vector control can be easily set by
Example of torque characteristics
300
Torque [%]
200
100
0
200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
• On inverters provided with a sensor, high-torque operation of
-100
-200
-300
Speed [min -
1 ]
*1: When a TOSHIBA standard 3-phase,
200 V - 2.2 kW 4-pole motor is driven,
• High-speed response frequencies of 40 Hz without sensor and
(Note, however, that torque differs according to voltage and capacity.)
Speed response to Speed recovery
reference changes response
Speed reference Motor speed Speed reference Motor speed
• Modifying software enables high-frequency output up to 1000
Load Load
torque torque
Current Current
*2: When a TOSHIBA standard 3-phase, 0.4 to 3.7 kW 4-pole motor are
0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800 900 1000
Time [ms] Time [ms]
Fast response Fast recovery against
impact load
Dedicated Functions Ideal for Lifting Applications
Point
6
Brake sequence/light-load, high-speed functions
Setup by teaching
• The inverter has two built-in functions, the brake sequence function and
Built-in transistor for dynamic braking
• The VF-AS1 has a built-in transistor for dynamic braking up to 160 kW,
5
auto-tuning to enable 1:120 speed control. Moreover, the VF-
AS1 also features a robust structure that is unlikely to be
influenced by motor temperature.
2
200%* from zero velocity is possible, achieving a speed
control range of 1:1000.
50 Hz with sensor are achieved respectively, to maintain fixed
speed in response to sudden changes in load.
Hz, which is ideal for spindle rotation of woodworking and
metalworking machinery.
driven.
light-load, high-speed function, as standard. The brake sequence function
measures the timing with braking by an external motor to achieve smooth
operation at start and stop of braking operation. The light-load, high-speed
function automatically increases the speed when operating light loads
according to the lifting load to improve conveyance efficiency. A learning
function for setting and storing to memory required parameters while
performing actual operations is also provided to facilitate adjustments.
which makes it ideal for lifting applications.
For system devices that requires flexibility
This makes the inverter ideal for process lines, printing machines,
coilers/uncoilers.
*1:Photos of machinery are for illustrative purposes only.
Customizing by "My Function"
Point
7
My function
Number of program steps : 28
Internal relays : 8
Internal counters : 2
Logic commands : ST, STN, AND,
ANDN, OR, ORN,
SET, RSET,
HOLD
ON/OFF DELAY TIMER
Data commands : EQ, NE, GT, GE,
LT, LE, ASUB
Communications and Network
Point
8
Programmable
controller
• With "My function", you can create programs containing
up to 28 steps. This achieves logic operations and internal
data operations. Parameters can also be set according to
analog input and minimum-peak hold of analog outputs.
For example:
(Ex.1) Inverter is automatically switched to commercial operation
without the external sequence when the inverter is tripped.
(Ex.2) A signal is output when torque reaches 120% and frequency
is 5 Hz.
(Ex.3) "Forward rotation operation," "preset-speed operation
frequency 3" and "No.2 acceleration/deceleration" are
simultaneously turned ON by input on a single terminal.
(Ex.4) The acceleration/deceleration time is changed dynamically
by a voltage within the range 0 to 10 V.
RS-485 communications
• RS-485 communications is equipped as standard,
and Modbus-RTU protocol is supported in addition
to TOSHIBA protocol.
Network options
• Use of communication options enables support of
2
DeviceNet* , PROFIBUS and CC-Link and other
main fieldbuses.
Data tracing
• The PCM001Z communications software allows you
to edit, monitor, and trace parameter data on a PC,
enabling easier data management from inverter
startup through to maintenance.
*2: DeviceNet is a registered trademark of ODVA (Open DeviceNet Vendor
Association).
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