Principle of Work: | Direct Torque Control |
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Main Circuit Type: | Voltage |
Voltage of Power Supply: | Low Voltage Variable-Frequency Drive |
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1. Adopt the independently developed DTC control technology with stronger robustness and fast torque response.
2. Adopt the common DC bus connection mode. Multi-Drive Inverter has the advantages of simple installation, convenient connection, reducing control cabinet space and saving energy consumption. This largely saves the wiring, installation and maintenance costs.
3. Built-in buffer circuit, no need for additional buffer circuit and directly powered by DC power supply.
4. Wide coverage of power levels, up to 3000kW in parallel voltage.
5. Wide voltage level coverage with three levels, respectively corresponding to 3AC220V, 3AC380V and 3AC690V for rectifier.
6. Full series of LCD operating panels by default (optional Chinese/English language).
7. Commission and monitor visa a browser without installing PC software and inserting rich built-in application macros.
8. Customized programming function, convenient commissioning and flexible application.
9. Support changing to active rectification unit.
Control characteristics | Control mode | Scarlar control | DTC without encoder | DTC with encoder |
Starting torque | 0.50Hz 150% | 0Hz 100%; 0.25Hz 200% | 0.00Hz 200% | |
Range of speed regulation | 1:100 | 1:200 | 1:1000 | |
Precision of steady speed | ± 0.5% | ± 0.2% | ± 0.02% | |
Torque control | - | Y | Y | |
Precision of torque control | - | ±5% | ±3% | |
Torque response time | - | <20ms | <10ms | |
Product function | Key function |
Under-voltage regulation, motor speed tracing, switchover of run command reference, multi−step frequency reference, motor parameter auto-tune, S curve acceleration and deceleration, mechanical brake control logic, PID regulation, current limit, torque limit, switch-over between torque control and speed control, user load curve, master-follower control, adaptive program, use as AFE, etc,. | ||
Speed reference source | Digita input, terminal UP/DN, communication, alalog input, multiple combination methods | |||
Frequency range | 0.00~600.00Hz | |||
Start mode | Auto, Flying start, start after DC magnetization, start after constant time DC magnetization | |||
Acceleration time and deceleration time | Multiple acceleration and deceleration time combinations, and S-curve acceleration and deceleration time are available |
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Dynamic braking | With overload capacity estimation | |||
DC braking | DC braking start waiting time is not required to achieve fast braking | |||
Magnetic flux braking | Active and inactive options, default inactive | |||
Unique functions | Keypad | LCD keypad (Chinese or English language) | ||
Support PC browser | Support use PC browser to monitor and commissioning | |||
Multiple IO ports | Up to 13 digital inputs and 6 relay outputs | |||
Multiple parameters menu | User parameters, monitoring parameters, non-factory value parameters | |||
Parameters copy | The keypad with standard configuration can upload and download parameters | |||
Dual 485 communication | The dual 485 communication interface supports Modbus-RTU, and the standard operation panel can realize the remote control box function, up to 500 meters | |||
Common DC bus | The full series can realize the common DC bus power supply for multiple drivers | |||
Independent air duct | The full series adopts independent air duct design and supports the installation outside the radiator cabinet | |||
Power-On-Self-Test (POST) |
Realizing the POST of internal and peripheral circuits, including motor grounded, abnormal +10V power supply output, analog input and disconnection, etc. | |||
Adaptive program | It does not need PC, and can realize the user-defined programming function, and can encrypt the user-defined programming | |||
AFE | Rectification and feedback functions can be realized |
Protection | Power supply under-voltage, over-current protection, over-voltage protection, interference protection, abnormal comparison level, motor data identification failure, module(IPM) protection, heat-sink over temperature protection, drive overload protection, motor overload protection, peripheral protection, abnormal current detection, output short circuit to ground, abnormal input power, output phase loss, abnormal EEPROM protection, abnormal pre-charging contactor detection, temperature sampling disconnection, encoder disconnection, abnormal +10V power supply, abnormal analog input, motor over temperature protection(PTC), abnormal communication, abnormal software version compatibility, abnormal copying, hardware overload protection, over speed protection | |
Efficiency | At rated power: 75kW and above power class ≥98% | |
Operating site |
Install vertically in a well-ventilated electrical cabinet. Horizontal or other installation are not allowed. The cooling medium is air. Installed in an environment free from direct sunlight, dust, corrosive gases, flammable gases, no oil mist, no steam, no dripping. | |
Ambient temperature | −10~+40ºC , derating use when the temperature between 40 to 50ºC , the rated output current is reduced by 1% for every 1 °C increasing. | |
Humidity | 5~95%, no condensation is allowed. | |
Altitude | 0~2000 meters,derating use when the altitude over 1000 meters, the rated output current is reduced by 1% for every 100-meter rising. | |
Vibration | 3.5 m/s2 , 2~9Hz; 10 m/s2 , 9~200Hz; 15 m/s2 , 200~500Hz | |
Storage temperature | −40~+70ºC |
The brake resistor power in the table iscalculated with the braking durationwithin 30s. lf the braking duration islonger, the brake resistor power mustbe larger Please determine theappropriate brake resistor poweraccording to the actual situation.The selection of brake resistor andbrake chopper is related to systeminertia, deceleration time, descentdistance, time (i.e. potential energy). Toselect the model according to theactual situation. lf the system inertia islarger, the deceleration time is shorter,and the braking is more frequent, thebrake resistor needs higher power andsmaller resistance value.