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VOLKMANN9000 Frequency Inverter
Volkmann9000 Digital Adjustable-Speed AC Drive (AC Motor Speed Controller)
Advanced Performance
The Volkmann 9000 Digital Adjustable-Speed AC Drive invorporates a proprietary PWM sinusoidal waveform designed especially to high speeds. Our improved PWM technology and IGBT devices result in a more perfect sine wave, free of subharmonics and without DC current. This can increase the bearing and insulation lives of high-speed spindles.
Fully Digital, High-Resolution Control
Our 16-bit Microprocessor and proprietary Gate Array function allow operating decisions and closed loops to be carried out with extremely high speed. It also ensures high accuracy while offering speed resolution as low as 0.01 Hz. The inverter software developed by Graseby Volkmann Corporation (GVC) permits a substantial improvement in fault protection and indication of the operating circuits. The GVC software, which facilitates inverter operations, allows a variety of custom operations, as well as adding many more standard features that others consider special. The Series 9000 is designed for applications in which advanced control equipment, such as machine tools and test stands are required.
Low Noise
The improved current waveform obtained by the Gate Array permits a reduction of output current ripple, which results in a reduction of magnetic noise and motor vibration. The drive and motor run quietly because of a high carrier frequency.
Easy Operation
The dirve is easy to operated and program with only a few simple key operations. A well- engineered keypad and four-line, 80 character LCD display are used for all inquiries, messages and indications. Information is displayed in plain English with no special code. A "HELP" button provides user-friendly support.
Standard Features
4"x20" LCD display (plain English, no codes)
Test meter screens on LCD shows voltage, load, current, speed and frequency
Extensive electronic diagnostics
Real load indication
Fault history (last 10 faults)
DC injection braking
150% overload for one minute (200% instantaneous)
Security access codes
Ioslatedcontrol circuits
Phase-to-Phase short-circuit protection
Power outage ride-through approximately 5 cycles
Input line fuses
Adjustable load limit
UL-list ed model available (consult factory)
Fully digital compact design
Control of motor frequencies up to 3000Hz and 200HP
Four Selectable carrier frequency settings ( 2.5K, 4.5K, 9K, 18K)
Dynamic braking, 10% standard
Switch mode control power supply
Two skip frequencies
Slip compensation
Analog O/P meter (load, speed, DC-link)
Programmable V/Hz Curve
Made in USA with two-year warranty
Special Machine Tool Options
Three additional programmable relays
Second analog output 0-10V(1mA)
Three additional digital inputs
Thermistor amplifier
Multiple motors (32Maximum) V/Hz, RPM, Accel, Decel, Preset Speed, HP
Spindle orientation (four point)
Gap eliminator (separate adjustment for up to 32 motors)
Second programmable analog input
Custom programming functions and screen messages
Closed loop speed regulation to 0.01%