Frequency Inverter (for Construction Hoists), AS620 Series Manufacturer

Frequency Inverter (for Construction Hoists), AS620 Series

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AS620 Series

The AS620 series of frequency inverters for construction hoists is designed for elevator drive applications. This high end inverter uses leading motor control technology for reliable, flexible and safe operation. Our customizable frequency inverters are mainly used for industrial cranes and hoisting.

Features
1. PWM dead zone compensation technology reduces loss of motor
2. Low-inductance bus technology for safety
3. Multiple frequency settings
4. Automatic slipping compensation adjustable depending on load and motor speed
5. Jumping frequency control function
6. AFR function: when grid voltage changes, the same output current is maintained

Special functions for elevators
1. Several options for VF curves
2. Counter and anti-counter torque and fixed torque startup
3. Safe and reliable AFR functions
4. Brake control functions

Reliable product design
1. Independent air duct design
2. Compact structure
3. Wide voltage range
4. Power on self-check function
5. Terminal protection
6. Overheating alerts

Technical specifications

Power input	Input power	380V~460V (-15%~ 10%), 3-phase power supply
	Input frequency	45~65Hz
	Permissible voltage variation	Voltage unbalance factor < 3%
	Transient voltage dips	For 3-phase AC 380V~460V power supply, when input voltage < AC300V, under-voltage protection after 15ms

Power output	Motor output voltage	0VAC~100% input voltage, 3-phase power supply
	Output frequency	V/F control: 0.00~300.00Hz
	Overload class	150%, 60s
	Efficiency (full load)	> 94%
	Accuracy of output frequency	±0.01% (digital instruction -10~ 45℃ ) ±0.1% (analog instruction 25±10℃ )

Digital input/output	Photocoupler isolation input	8-way, 24V high/low effective level is settable. Input functions are definable.
	Open collector output	6-way. Output functions are definable.
	Relay output	2-way. NO and NC double contacts, contact capacity: resistive, 5A 250VAC or 5A 30VDC; output functions are definable.

Analog input/output	Analog voltage input	2-way, -10~ 10 VDC or 0~ 10 VDC, accuracy 0.1%
Analog input/output	Potentiometer voltage	Provide 10VDC power (maximum 25mA) for setting speed

Control characteristics	Control method	V/F control
	Startup torque	2.50Hz 150%
	Range of speed regulation	1:50
	Accuracy of speed control	±2%; obtain ±0.5% accuracy under slip compensation
	Carrier frequency	2~10k (Hz)
	Frequency setting resolution	0.01Hz (digital instruction) ±0.06Hz/120Hz (analog instruction 11bit unsigned)
	Operation command channel	Operation panel given, control terminal given, communication given
	Frequency given channel	Operation panel given, digital/analog given, communication given
	Torque boost	Automatic torque boost; manual torque boost
	V/F curve	User-defined V/F curve, linear V/F curve and 5 kinds of drop torque characteristic curves
	Automatic voltage regulation (AVR)	Regulate the duty cycle of output PWM signal automatically according to the fluctuation of bus voltage so as to relieve the effect on the output voltage fluctuation by fluctuation of the grid voltage.