Real-time Clock Current Vector Inverter
The 860S series 45–75kW high-power vector frequency converter drive unit is designed for heavy-duty industrial transmission. It features a reinforced heat dissipation structure for the high-power IGBT power circuit and utilizes a new generation of current vector control algorithms to achieve stable output under heavy loads and low speeds with high torque.…
The 860S series 45–75kW high-power vector frequency converter drive unit is designed for heavy-duty industrial transmission. It features a reinforced heat dissipation structure for the high-power IGBT power circuit and utilizes a new generation of current vector control algorithms to achieve stable output under heavy loads and low speeds with high torque. It supports a wide range of expansion modules to adapt to heavy-duty automation systems. The equipment integrates multi-mode frequency synthesis, intelligent PID process closed-loop, 16-segment segmented program operation, and frequency tracking functions. It is optimized for overload and voltage fluctuation resistance in applications such as fans, pumps, mining conveyors, heavy machine tools, and heavy-duty chemical equipment. The entire unit features standardized RS485 Modbus communication, and the braking unit uses an external independent chopper solution. A high-power braking resistor can be selected based on the braking frequency to adapt to heavy loads with high inertia and frequent deceleration.
1. Heavy-duty reliable protection design
The system features multi-level protection against three-phase input/output phase loss, motor short circuit upon power-on, bus over/under voltage, module over-temperature, and output overload. It can be configured with two levels of resonance to avoid frequency hopping, and automatically suppresses bus overvoltage and overcurrent under heavy load stall, preventing frequent tripping and shutdown. The power unit has an independent air duct for heat dissipation, significantly improving its tolerance to dust and high-temperature environments.
2. High-power, high-performance drive
Open-loop vector 0.25Hz output 150% starting torque, closed-loop torque control accuracy ±3%; real-time slip compensation ensures constant speed under heavy load; instantaneous power failure operation maintenance function adapts to continuous production lines; 150% rated current continuous overload output for 1 minute meets heavy load starting impact conditions; AVR automatic voltage regulation stabilizes output voltage when the power grid fluctuates.
3. Diversified process control functions
Ten sets of main/auxiliary frequency sources can be freely combined and switched; the high-speed pulse port supports 0–100kHz signal transmission and reception; the built-in simple programmable controller can run in multiple speed cycles to adapt to production line processes; the oscillation frequency, meter counting, and constant pressure PID closed loop can be directly used in wire drawing, water supply, and extrusion equipment; the digital tube panel can be customized to display multiple types of operating data.
4. Expansion and Terminal Configuration
The device features multi-channel isolated digital I/O, dual-channel analog input/output, high-speed pulse feedback port, and relay alarm output; optional isolation communication card, multi-channel I/O expansion card, and multi-type PG encoder acquisition card, compatible with differential, collector, UVW, and resolver encoders; RS485 standard interface supports multi-unit network remote monitoring and debugging.
| 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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