Sensorless Control PMSM VFD
Product Overview The 860E-450-750KW Max Power Permanent Magnet Synchronous VFD is the flagship ultra-high-power model of the NH860E series, specially developed for 450-750KW super-large permanent magnet synchronous motors in heavy industry. It adopts full modular pluggable power unit design and multi-group industrial fan forced cooling system, being the highest-spec dedicated PMS motor…
Product Overview
The 860E-450-750KW Max Power Permanent Magnet Synchronous VFD is the flagship ultra-high-power model of the NH860E series, specially developed for 450-750KW super-large permanent magnet synchronous motors in heavy industry. It adopts full modular pluggable power unit design and multi-group industrial fan forced cooling system, being the highest-spec dedicated PMS motor drive of the whole series.
Optimized for super-large inertia PMS motor operating characteristics, it delivers ultra-stable high-torque output and precise speed regulation. The upgraded multi-layer filtering and safety protection system adapts to the harshest industrial power grid environments, and the multi-machine parallel energy recovery system realizes centralized energy management for factory core PMS motor equipment.
Application Scenarios
Flagship central drive for super-large permanent magnet synchronous motors, applicable to super mine main hoists, metallurgical cold/hot rolling full-line main drives, thermal power large fans and ultra-large cement production line transmission systems.
Product Features
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Full modular pluggable structure, fast module replacement, reducing downtime of ultra-large PMS motor drive equipment
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Multi-group independent air duct forced cooling, zero heat accumulation for long-term full-load operation
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Ultra-low frequency high-torque dedicated algorithm, zero-shock startup for super-large inertia permanent magnet motors
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High-power pre-charging and anti-surge design, stable operation under extreme grid conditions
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Full isolated multi-protocol communication, compatible with all mainstream industrial control systems
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Support external high-power braking cabinet, adapting to frequent forward-reverse heavy-load PMS motor working conditions
| 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) |
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| 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 |
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| 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 |
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| 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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