ED3100 Series Open Loop Vector Control Variable Frequency Drive
A standard motor uses the scalar drive to maintain a constant V/F pattern. The scalar drive only tells the motor what to do. But it has no way of knowing whether the motor does it or how well it does. That means the scalar drive lacks accuracy in motor speed and torque control. Advances in motor control technology allow us to develop this ED3100 series open loop vector control variable frequency drive for more precise control of voltage and frequency.
The phrase open loop is rather a misleading term. All vector controls are in fact closed loop system, which means feedback information is available in all of them. The only difference is that the so-called open loop vector drive does not use a sensor or shaft encoder to get operational data feedback. That is why an open-loop vector control VFD is sometimes called the sensorless vector control, or SVC for short. The sensorless vector drive uses motor feedback information to calculate the exact vector of voltage and frequency, which in turn knows the motor speed and torque.
For applications that require precise motor speed control, this sensorless vector control variable frequency drive might be the best bet. One advantage our sensorless vector control over the standard scalar control is that it produces full torque at zero speed, which is nearly impossible with a scalar drive especially under low frequency conditions. This sensorless vector drive is mainly designed for OEM pump or fan motor control systems that require precise delivery of speed and torque under a specified range of load conditions.
Technical Specifications
| Power range of open loop vector control variable frequency drive | 0.75-400KW/380V, 0.75KW-2.2KW/220V |
| Output frequency | 0HZ~400HZ |
| Control mode | V/F control, SVC vector control |
| Speed range | 1 : 50 (V/F); 1:100 (SVC) |
| Overload capacity | M type: 150% 1 minute, 180% 1 second, 200% instant protection required |
| F type: 120% 1 minute, 150% 1 second, 180% instant protection required | |
| Protections | Over-current protection, over-voltage protection, low-voltage protection, overheat protection, overload protection, etc. |
| Operator interface | Forward and reversing command buttons, 6 programmable discrete inputs, 2 analog signal inputs, 1 analog signal output, 3 programmable open collector output, 1 programmable relay output. |
| Serial communication port | Standard RS-485 interface |
Features of Sensorless Vector Drive
1. Advanced vector control algorithm, high starting torque at low frequency, and 180% rated torque at 0.5Hz
2. Our open-loop vector control system can be provided with pulse signal input and output functions to for a digital closed-loop vector drive.
3. Built-in automatic torque compensation function and error correction feature
4. Integrated protections, motor operating parameters monitoring, making parameter adjustments on the fly.
5. Automatic reporting of motor operating parameter error at zero frequency, which effectively avoids the disturbances to analog signals.
6. Freely switch between frequency channels on the fly.
7. Programmable input and output terminals satisfy customers' various requirements for their open loop vector control variable frequency drive.
8. A 3-phase 380V open-loop vector control variable frequency drive is compatible with a 630w motor, while a 3-phase 220V vector drive can match with a motor of up to 132w (customization needed).
9. Synchronization in fine tuning serial bus signals, dual analog outputs, LCD keypad, and other non-standard features that meet special requirements.
10. Independent air ducts for effective heat dissipation. Removable window screen and dust cover on the window ventilator prevents the ingress of dust.
11. Surge absorbing circuit designed at AC input terminal restrains the grid surge effectively.
12. New concept design presents an attractive appearance.
Sensorless Vector Drive Installation Size
| ED3100P Series specification list | ||||||||
| series | KW | H(mm) | W(mm) | D(mm) | H1(mm) | W1(mm) | R(mm) | Note |
| power | Shell Size | Installation Size | Aperture | |||||
| MINI-S | 0.4-1.5 | 155 | 85 | 122 | 144 | 74 | 2.5 | |
| MINI-L | 0.4-1.5 | 175 | 98 | 152 | 165 | 88 | 2.5 | |
| ED3100P | 0.75-4 | 232 | 132 | 162 | 218 | 120 | 2.5 | |
| 5.5-7.5 | 270 | 226 | 179 | 256.5 | 210 | 3.25 | Plastic Shell | |
| 11-18.5 | 350 | 247 | 232 | 334 | 186 | 4.5 | Metal Shell | |
| 22-30 | 530 | 341 | 285 | 510 | 200 | 5.5 | ||
| 37-45 | 600 | 368 | 281 | 580 | 230 | 5 | ||
| 55-75 | 679 | 394 | 302 | 659 | 300 | 6 | ||
| 93-132 | 825 | 533 | 368.6 | 797 | 420 | 6 | ||
| 160-200 | 1250 | 684 | 470 | 1222 | 420 | 6 | ||
| 160-200 | 1425 | 420 | 470 | 1411 | 420 | |||
| 220-280 | 1500 | 700 | 471 | cabinet Installation | ||||
| 315-400 | 1600 | 830 | 482 | cabinet Installation | ||||
| ED3100-M Sensorless Vector Control Variable Frequency Drive | Specs | |
| Input | Rated voltage and frequency | Single-phase 220V, three-phase 220V, three-phase 380V, 50Hz/60Hz |
| Allowable variations (tolerance) | Voltage: -20% 20 Voltage unbalance: <3% Frequency: ±5 | |
| Output | Rated voltage | 0~200V /0~380V |
| Frequency range | 0Hz~400Hz | |
| Overload capability | 150% for 1 min, 180% for 1s, 200% instant protection required | |
| Main control function | Control mode | Voltage vector PWM modulator Sensorless vector control (SVC) |
| Frequency accuracy | Digital mode: Max frequency ×±0. 01% Analog mode: Max frequency ×±0. 2% | |
| Frequency resolution | Digital mode: 0.01Hz Analog mode: Max frequency ×0.1% | |
| Torque rise | Auto torque rise Manual torque rise: 1%~30.0% | |
| V/F curve | Linear V/F curve Quadratic V/F curve User-defined V/F curve | |
| S-curve Acceleration/deceleration | Optional time unit: (Min/s) Maximum acceleration and deceleration time: 6000s (adjustable within the range of 0.1~3600s). | |
| DC braking unit | Operating frequency: 0~20Hz Operating voltage level: 0~20% Operating time: ± 0~20s | |
| Jog Switch | Jog frequency range: 0.1Hz~50.00Hz Jog acceleration and deceleration time: 0.1~3600s. | |
| Built-in PID | The PID controller receives feedback data from the motor sensor, compares the data against pre-set standards by the PLC system, and corrects for operating errors. Thanks to the PID controller, a complete closed loop control system can be formed to offer precise control of flow rate or pressure in industrial automation systems. | |
| Multiple preset speeds | Built-in PLC system and control terminals | |
| Weave and wobble | Adjustable wobble frequency | |
| Auto voltage adjustment | The motor output voltage is kept constant regardless of changes in the mains voltage, thanks to the PWM modulator with AVR functions. | |
| Power saving mode | The V/F pattern is constantly adjusted to varying load conditions for maximum energy efficiency. | |
| Auto current control | Current-limiting features prevent the sensorless vector drive tripping on a fault caused by excess current. | |
| Sensorless vector control | Torque | 150% at 1Hz Torque adjustment accuracy: 0.1% |
| Automatic display of motor operating parameters | Check parameters on the display when the motor completely stops in order to achieve optimal control | |
| Run Enable | Commands for open-loop vector control variable frequency drive | Selection of operation modes Selection of control terminals Selection of serial ports |
Use of Open-Loop Vector Control in Industry
Sensorless vector control systems or, open-loop vector control variable frequency drives, can be used in plastic extrusion machinery, ceramic manufacturing machinery, electric machinery, textile machinery, light industry equipment, pharmaceutical machinery, packaging and printing machinery, paper production line, chemical fiber production line, wires and cables machinery, machining equipment, machine tool, grinding tool, dyeing equipment, bag maker, cold rolling mill, low-frequency roller, centrifuge, etc.
