Long Cable Current Vector Inverter
The 860S series 18.5–22kW medium-power current vector driver is equipped with a high-performance vector computing chip, relying on mature closed-loop/open-loop vector algorithms to achieve high-precision motor torque control. The entire unit has reserved expansion slots for various types of cards and is compatible with mainstream industrial fieldbus protocols. The device integrates multi-frequency…
The 860S series 18.5–22kW medium-power current vector driver is equipped with a high-performance vector computing chip, relying on mature closed-loop/open-loop vector algorithms to achieve high-precision motor torque control. The entire unit has reserved expansion slots for various types of cards and is compatible with mainstream industrial fieldbus protocols. The device integrates multi-frequency superposition and switching logic with optimized PID closed-loop control. It has a built-in simple programmable logic unit supporting 16-segment multi-speed automatic operation, along with dedicated functions such as frequency swing, speed tracking, and fixed-point/fixed-length counting. While enhancing the overall operational stability and adaptability to complex working conditions, it optimizes human-machine interaction logic and industry-specific control solutions, making it suitable for mid-to-high-end automated production lines in small and medium-sized cranes, textile printing and dyeing, printing and packaging, metal processing, and CNC equipment. Models in this power range come standard with an RS485 Modbus communication interface, and all models have a built-in integrated braking chopper unit, requiring only an external braking resistor to achieve rapid energy dissipation braking, suitable for frequent start-stop and potential energy discharge load scenarios.
1. Stable operation and protection system
It integrates multiple hardware protections against overvoltage, overcurrent, overload, overtemperature, phase loss, and motor short circuit; it supports two-level jump frequency settings to accurately avoid vibration and abnormal noise caused by mechanical resonance; and it allows customization of overvoltage and overspeed protection thresholds, significantly reducing downtime due to deceleration and heavy load conditions.
2. High-performance driving capability
Built-in automatic torque boosting logic, outputting 150% of rated torque at a low frequency of 0.5Hz; slip compensation algorithm optimizes speed control accuracy; short-term power outage resume function ensures equipment continues to operate even during momentary power failure; low carrier noise optimized design reduces motor vibration; capable of continuous 150% rated torque output for 60 seconds during short-term overload.
3. Multifunctional control logic
It supports pulse-based speed regulation and main/auxiliary frequency addition/subtraction synthesis, with a maximum pulse input/output of 100kHz; it can freely switch between 10 types of frequency sources, including panel, analog, communication, multi-speed, PID, and simple PLC, and the auxiliary frequency source supports fine-tuning; the 5-digit LED display on the machine body can be customized to display operating parameters such as voltage, current, speed, and output frequency; it comes with swing frequency, counting, and fixed-length cutting process functions, and can complete basic automation processes without the need for an external PLC.
4. Terminal and Communication Configuration
Digital inputs support two-wire/three-wire start/stop, external fault detection, speed adjustment, pulse acquisition, and automatic program execution; digital outputs can provide feedback on arrival frequency, torque over-limit, overload warning, and count completion signals; dual analog inputs (0–10V/0–20mA), multiple relays, and open collector pulse output; natively equipped with isolated RS485, supporting centralized network control, and expandable with IO, PG encoders, and industrial bus communication expansion cards.
| Item | Specification | |
| Control characteristics | Output frequency | 0 – 500HZ |
| Carrier frequency | 0.8kHz ~ 12kHz. The carrier frequency can be automatically adjusted according to the load characteristics. | |
| Output frequency resolution | Digital setting: 0.01Hz | |
| Analog setting: Maximum frequency × 0.025% | ||
| Control mode | Open – loop vector control (SVC) V/F control Closed – loop vector control (FVC) |
|
| Torque characteristics | With torque compensation and slip compensation, the starting torque can reach 150% at 0.25Hz (SVC) | |
| Torque control accuracy | SVC: Above 5Hz ± 5% FVC: ± 3% | |
| Over-voltage and over-current stall prevention protection | Automatically limit the voltage and current during use to prevent frequent over – voltage and over – current tripping | |
| Speed regulation range | 1:200 (SVC) 1:1000 (FVC) | |
| Speed stabilization accuracy | ±0.5% (SVC) ±0.02% (FVC) | |
| Overload capacity | 150% of the rated output current for one minute | |
| V/F curve | Four modes: linear; multi – point; complete V/f separation; incomplete V/f separation | |
| Acceleration and deceleration curve | Linear or S – curve acceleration and deceleration modes; four acceleration and deceleration times; acceleration and deceleration time range 0.1 ~ 6500.0s |
|
| DC braking | DC braking frequency: 0.00Hz ~ maximum frequency. Braking time: 0.0s ~ 36.0s, braking action current value: 0.0% ~ 100.0% | |
| Jog control | Jog frequency range: 0.00Hz ~ maximum frequency; jog acceleration and deceleration time 0.1s ~ 6500.0s | |
| Simple PLC, multi-step speed operation | Up to 16 – step speed operation can be achieved through the built – in PLC or control terminals | |
| Built – in PID | It can easily realize the process – control closed – loop control system | |
| Automatic voltage regulation (AVR) | When the grid voltage changes, it can automatically maintain a constant output voltage | |
| Fast current – limiting function | Minimize over – current faults to the greatest extent and protect the normal operation of the frequency converter | |
| Operating characteristics | Operating command channel | Three channels: given by the operation panel, given by the control terminals, given by the serial communication port. It can be switched in various ways |
| Frequency source | Ten frequency sources: given by panel knob, given by operation panel, given by analog voltage, given by analog current, given by RS485 communication, multi – speed, PID, simple PLC, which can be switched in various ways | |
| Auxiliary frequency source | Ten auxiliary frequency sources. It can flexibly achieve auxiliary frequency fine – tuning and frequency synthesis | |
| Input terminals | Five digital input terminals, one of which can be used as a high – speed pulse input. Two analog input channels, AI1: input range 0 ~ +10V, AI2: input range 0 ~ +10V/0 – 20mA |
|
| Output terminals | One high – speed pulse output terminal, capable of outputting a square – wave signal from 0kHz ~ 50kHz, which can realize the output of physical quantities such as set frequency and output frequency. It can be selected as open – drain type One digital output terminal One relay output terminal Two analog output terminals: 0V ~ 10V/0 – 20mA, which can indicate the output of output frequency/current/voltage/frequency command/rotational speed/power factor signals |
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| Display and keyboard operation | LED display | It is equipped with 8 function keys, a 5 – digit 7 – segment LED, and 5 status LED indicators It can perform forward rotation, reverse rotation, reset, stop, jog, as well as parameter setting and display |
| Protectioncharacteristics | Protection function | Motor short – circuit detection upon power – on, input and output phase – loss protection, over – current protection, over – voltage protection, under – voltage protection, over – heat protection, overload protection, short – circuit protection, etc |
| Othercharacteristics | Optional card | IO expansion card, communication card (isolated type), PG card |
| Multi – encoder support | Supports differential, open – drain, UVW, resolver | |
| Environment | Application place | Indoors, not directly exposed to sunlight, free from dust, corrosive gases, flammable gases, oil mist, water vapor, dripping water or salt, etc |
| Altitude | Less than 1000m | |
| Ambient humidity | – 10℃ ~ + 40℃ (When the ambient temperature is between 40℃ ~ 50℃, derating operation is required) | |
| Humidity | Less than 95%RH, without water droplet condensation | |
| Vibration | Less than 5.9m/s² (0.6g) | |
| Storage temperature | – 20℃ ~ + 60℃ |
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