VFD-EL-W: Compact Variable Frequency Drive with Full Functions
The VFD-EL-W represents a new generation of general-purpose sensorless vector inverters, featuring an ultra-compact and exquisite design. With significantly reduced size and weight, it easily installs in equipment with limited space or production lines requiring streamlined layouts, eliminating installation space concerns.
This inverter inherits Delta's proven stable performance characteristics, enabling quick setup without complex debugging. While maintaining industrial-grade equipment reliability, it offers user-friendly operation. Equipped with multiple practical built-in functions, it covers most general application scenarios. Comprehensive protection mechanisms prevent equipment damage or production downtime from unexpected failures, helping customers effectively save on maintenance and accessory costs.
Key Features & Benefits
- Ultra-Compact & Lightweight Design: Significantly smaller and lighter than traditional inverters (2.2kW single-phase model: 140×250×130mm, 2-3kg). Ideal for equipment with limited installation space, reducing cabinet size and installation labor costs.
- Proven Delta Reliability: Inherits Delta's industrial-grade stability with mature core technology. Delivers consistent performance in harsh industrial environments, minimizing downtime and ensuring long-term operational reliability.
- All-in-One Practical Functions: Built-in multi-speed operation, torque compensation, PID control, multi-pump control, constant pressure water supply, and water leakage detection. Eliminates additional controllers, covering 80% of general-purpose scenarios.
- Comprehensive Protection Mechanisms: Equipped with overcurrent, overvoltage, undervoltage, overheating, overload, overtemperature, and output phase loss protection. Automatically shuts down or alarms to prevent equipment damage.
- Easy Commissioning & Operation: Intuitive interface with preset parameters for common functions. Basic setup can be completed in 30 minutes without professional technical background.
- Wide Compatibility: Works with induction motors from all brands (voltage/power match required). Supports single-phase 200-240V and three-phase 380-480V inputs for different regional power supplies.
- Energy-Saving & Cost-Effective: Sensorless vector control ensures precise speed regulation, reducing energy consumption for pumps, fans, and variable-load equipment.
- Durable & Adaptable: IP20 protection class with self-cooling design. Operates reliably in -10℃~40℃ environments with automatic derating for high temperatures.
Core Specifications
| Specification Category |
Details |
| Control Method |
Sensorless Vector Control, V/F Control |
| Input Voltage Range |
Single-phase 200-240V ±10% (50/60Hz); Three-phase 200-240V ±10%, 380-480V ±10% (50/60Hz) |
| Output Voltage Range |
0 to Input Voltage (Continuously Adjustable) |
| Output Frequency Range |
0.1-400Hz |
| Overload Capacity |
150% Rated Current for 60s; 180% Rated Current for 1s |
| Speed Regulation Accuracy |
±0.5% Rated Speed (Sensorless Vector Mode) |
| Carrier Frequency |
2-16kHz (Auto-adjustable) |
| Protection Class |
IP20 |
| Cooling Method |
Self-cooling |
| Ambient Temperature |
-10℃~40℃ (For each 1℃ rise above 40℃, output current decreases by 2%; 50% derating at 50℃) |
Complete Model Specifications
| Model |
Input Power Specification |
Rated Power (kW) |
Rated Power (HP) |
Rated Current (A) |
Output Frequency Range (Hz) |
Control Mode |
Protection Class |
Cooling Method |
Suitable Motor Power (kW) |
Suitable Motor Power (HP) |
Application Scope Notes |
| VFD004EL21W |
Single-phase 200-240V ±10%, 50/60Hz |
0.4 |
0.5 |
2.5 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
0.4 |
0.5 |
Small pumps, fans, mini-conveyors |
| VFD007EL21W |
Single-phase 200-240V ±10%, 50/60Hz |
0.75 |
1.0 |
4.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
0.75 |
1.0 |
Household appliances, small workshop equipment |
| VFD015EL21W |
Single-phase 200-240V ±10%, 50/60Hz |
1.5 |
2.0 |
6.5 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
1.5 |
2.0 |
Small packaging machines, lab equipment |
| VFD022EL21W |
Single-phase 200-240V ±10%, 50/60Hz |
2.2 |
3.0 |
9.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
2.2 |
3.0 |
Small woodworking machines, gym equipment |
| VFD037EL21W |
Single-phase 200-240V ±10%, 50/60Hz |
3.7 |
5.0 |
15.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
3.7 |
5.0 |
Medium-sized fans, industrial pumps |
| VFD004EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
0.4 |
0.5 |
1.2 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
0.4 |
0.5 |
Automation line auxiliary equipment |
| VFD007EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
0.75 |
1.0 |
2.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
0.75 |
1.0 |
Small compressors, conveyor belts |
| VFD015EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
1.5 |
2.0 |
3.5 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
1.5 |
2.0 |
Printing machinery, textile auxiliary equipment |
| VFD022EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
2.2 |
3.0 |
4.8 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
2.2 |
3.0 |
Mixers, small agitators |
| VFD037EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
3.7 |
5.0 |
7.5 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
3.7 |
5.0 |
Air compressors, water supply pumps |
| VFD055EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
5.5 |
7.5 |
11.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
5.5 |
7.5 |
Medium-sized fans, industrial mixers |
| VFD075EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
7.5 |
10.0 |
15.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Self-cooling |
7.5 |
10.0 |
Large water pumps, HVAC systems |
| VFD110EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
11.0 |
15.0 |
21.0 |
0.1-400 |
Sensorless Vector / V/F |
IP20 |
Forced air cooling |
11.0 |
15.0 |
Heavy-duty conveyors, industrial compressors |
| VFD150EL43W |
Three-phase 380-480V ±10%, 50/60Hz |
15.0 |
20.0 |
28.0 |
0.1-400 |
|
|
|
|
|
|
Application Industries & Scenarios
General Machinery Industry
- Water Pumps (Constant Pressure Water Supply Systems, Small Circulation Pumps)
- Fans (Ventilation Fans, Exhaust Fans)
- Conveyors (Small Production Line Conveying Equipment)
- Mixers (Food Processing, Chemical Raw Material Mixing Equipment)
- Compressors (Small Air Compressors)
Light Industry Manufacturing
- Packaging Machinery (Sealing Machines, Labeling Machines, Small Packaging Lines)
- Printing Machinery (Small Printing Machines, Label Printing Equipment)
- Textile Machinery (Small Spinning Machines, Weaving Machine Auxiliary Equipment)
- Woodworking Machinery (Electric Saws, Grinders, Small Woodworking Machines)
Commercial & Civil Scenarios
- HVAC Terminal Fans and Pumps
- Building Constant Pressure Water Supply Systems
- Small Cold Storage Refrigeration Unit Fans
- Gym Equipment (Treadmills, Spinning Bikes Speed Control)
Other Scenarios
- Laboratory Small Equipment
- Automation Production Line Auxiliary Transmission Equipment
- Agricultural Irrigation Pump Control
Frequently Asked Questions
How small is this inverter exactly? Is it suitable for compact spaces?
Take the 2.2kW single-phase model as an example—its dimensions are approximately 140×250×130mm (W×H×D), which is smaller than traditional inverters. Weighing only 2-3kg, it's easy to wall-mount and perfectly suitable for equipment or control cabinets with limited space.
Can it be quickly commissioned without professional technicians?
Absolutely! It has an intuitive operation interface, and common functions like multi-speed operation and PID control come with preset parameters. Follow the user manual step by step, and basic commissioning can be completed within 30 minutes—no complex professional knowledge required.
Do I need an additional sensor for constant pressure water supply applications?
Yes, you need to match it with a pressure sensor (e.g., 4-20mA signal). The inverter has built-in full-featured constant pressure water supply and multi-pump control functions, so no extra controller is needed. Simply connect the sensor and set the target pressure to start using.
What causes the "Overcurrent" alarm during operation?
There are 3 common reasons: 1) Loose or short-circuited motor wiring (check the motor cables); 2) Overload exceeding the inverter's capacity (check if the equipment is jammed); 3) Too short acceleration time (adjust the acceleration time appropriately).
Is this inverter compatible with motors from different brands?
Yes! As long as the motor's rated voltage and power match the inverter, it can drive any brand of induction motor—highly versatile.
Will high ambient temperatures above 40℃ affect performance?
The inverter will automatically derate when the temperature exceeds 40℃ (output current decreases by 2% for each 1℃ rise). For long-term use in high-temperature environments, ensure proper heat dissipation (e.g., add cooling fans, increase installation spacing) to avoid affecting equipment lifespan.
Does it have water leakage detection? How to use it?
Yes, it has a built-in water leakage detection function. Connect an external water leakage sensor, and the inverter will automatically shut down and alarm when water leakage is detected—protecting the equipment from water damage. Ideal for pumps and equipment used in humid environments.
