A main drive motor supplies power to turn the centrifuge. AC drives are commonly used to power the main drive motor. There are several different types of washing machines, such as: Vertical, horizontal, or scroll (conveyor).

Application Challenges

Minimize the need for gears or belts to drive the centrifuge.
Control and maintain speed during the decanting process
Develop high torque at very low speeds.
Two motor applications, one for the bowl and one for the scroll.
The bowl has a very high-reflected inertia.
The scroll is usually in continuous regeneration, as it runs at a slower speed than the bowl and is pulled along.
Torque limiting on the scroll is very important.
Some configurations require zero-speed operation of the scroll (differential gearbox).
Dynamic braking or regenerative modules may be required if the bowl is NOT driven by a drive.

Power range of V8 VFD

Voltage: 3 phase 380VAC (304VAC – 460VAC)

Power: 0.4kw/0.5HP – 400kw/535HP

Specification of V8 VFD

Item	Specification
Input frequency	50/60Hz
Output frequency	0-600Hz
Overload current	150% rated current 1min., 180% 2 sec.
Control mode	sensor-less vector control(SVC), V/F control
Starting torque	150% 1Hz (SVC 150% 0.5Hz)
Control precision	±0.5%
Given Frequency Resolution	Digital given: 0.01Hz, analog given: 0.05Hz
Running Mode	Keyboard, control terminal, RS485
Output Voltage self-adjustment	When AVR function is enabled, the input voltage changes, while the output voltage almost remains unchanged
Frequency setting signal	0~+10V; 0~20mA;
Protection function	Short circuit, overcurrent, overload, overvoltage, undervoltage, default phase, overheating, and external fault, etc.
Enclosure	IP20
Cooling mode	forced air cooling
Vibration	Less than 0.5g
Ambient temperature / Humidity	-10 Degrees~+40 Degrees / 20~90%Rh (no condensation)

Tips:

A variable-frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. A variable frequency drive is a specific type of adjustable-speed drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, microdrives or inverter drives. Since the voltage is varied along with frequency, these are sometimes also called VVVF (variable voltage variable frequency) drives.

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