Vector 750 Watt Power Inverter Spezifikationen PDF herunterladen (Seite 8)

Section 2

General Information

General Information 2-1MN722

Overview The Baldor Series 22H Line Regen Vector Control provides full motoring and line

regeneration to the AC power mains with a near unity power factor. The control uses

PWM controlled by IGBT power transistors in both the converter and inverter sections of

the control to provide 3 phase power to the motor and Regen power to the line. Flux

vector technology (sometimes referred to as Field Oriented Control) is a closed loop

control scheme that adjusts the frequency and phase of voltage and current applied to a

three phase induction motor. The vector control separates the motor current into it’s flux

and torque producing components. These components are independently adjusted and

vectorially added to maintain a 90 degree relationship between them. This produces

maximum torque from base speed down to and including zero speed. Above base

speed, the flux component is reduced for constant horsepower operation. In addition to

the current, the electrical frequency must also be controlled. The frequency of the

voltage applied to the motor is calculated from the slip frequency and the mechanical

speed of the rotor. This provides instantaneous adjustment of the voltage and current

phasing in response to speed and position feedback from an encoder mounted on the

motors’ shaft.

The Line Regen vector control provides several advantages over non-regenerative

drives:

Regenerated energy from the motor is returned to the power source. The

control can provide regenerated energy absorption up to it’s full rating on a

continuous basis.

Input current is controlled to be a near unity power factor at rated load.

Line harmonic distortion is reduced.

DC Bus voltage is always controlled. Therefore, line voltage transients do not

affect the output voltage to the motor.

The Baldor Series 22H control may be used in many different applications. It may be

programmed by the user to operate in different operating zones. It can also be

configured to operate in a number of modes depending upon the application

requirements and user preference.

It is the responsibility of the user to determine the optimum operating zone and mode to

interface the control to the application. These choices are made with the keypad as

explained in the programming section of this manual.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 121 122

Keine Kommentare

Vector 750 Watt Power Inverter Spezifikationen Seite 8