Overview
The Versa Drives BLDC Air Cooler Motor & Controller is a 230 V AC input, 110 W, three-phase BLDC motor and FOC controller combination engineered specifically for evaporative / desert air coolers. It replaces traditional shaded-pole and PSC motors with a high-efficiency, variable-speed solution that integrates both the main fan motor and auxiliary motors for water circulation and swing louvers in a single compact drive.
With field-oriented control (FOC), sinusoidal commutation, and robust protection features, this platform helps OEMs design quieter, more energy-efficient, and feature-rich air coolers with minimal extra electronics.
Key Applications
- Residential and commercial evaporative / desert air coolers
- Window and portable air coolers for homes, shops, and offices
- Rooftop and ducted air coolers needing efficient, variable-speed airflow
- BLDC upgrade platforms for existing cooler ranges currently using induction motors
Motor & Controller Combination
- Input: 180–300 V AC, 50 Hz single-phase supply
- Output: 230 V AC three-phase BLDC motor drive (up to ~110 W fan motor)
- Integrated auxiliary outputs for:
- Water circulation pump motor (~5 W, 1-phase)
- Swing louver motor (~5 W, 1-phase)
- Drive efficiency: >92.5% at rated operating conditions
- Designed as a combined motor + controller solution for OEM integration
Control Method & Performance
- Field-oriented control (FOC) with sinusoidal commutation for smooth, low-noise operation
- Wide speed range (0–200 Hz motor electrical frequency) to support multiple airflow modes:
- Sleep / night mode (very low speed)
- Normal and high-cooling modes
- Turbo / max airflow mode
- Stable low-speed performance without stalling, even under varying load conditions
- High efficiency compared to PSC or shaded-pole cooler motors, enabling lower energy consumption and cooler running
Interfaces & Integration
- Speed command via analog potentiometer input (front-panel knob or remote-controlled electronic potentiometer)
- Fault indication through on-board LED for quick diagnostics
- Compact form factor suitable for mounting inside cooler enclosure with minimal extra wiring
- Simple wiring for auxiliary motors (water pump and louver) routed directly from the controller
Protection & Reliability
- Integrated protections:
- Under-voltage and over-voltage
- Over-current and overload
- Locked-rotor protection
- Automatic shutdown in fault conditions to protect motor and electronics
- Designed for operation in high-humidity environments common in evaporative coolers
- Design aligned with IEC 61800-3 and IEC 61800-5 for adjustable-speed electrical power drive systems
Typical OEM Use Cases
- OEMs upgrading existing cooler models from induction motors to BLDC for higher efficiency and quieter operation
- New premium cooler models with multiple airflow profiles and better user comfort
- Export-oriented air cooler designs needing efficient, standards-aligned BLDC drives
- Platform for branded coolers where integrated pump and louver control reduce wiring and PCB count
Product Status
- PoC / evaluation units available for OEM validation
- Customisation support available for volume programmes
OEM Value Proposition
- High-efficiency BLDC air cooler controller + motor combination with integrated water pump and louver drive
- Reduces system power consumption and noise while enabling richer speed control and modes
- Simplifies overall electronics by combining fan, pump, and louver control in a single drive
- Backed by Versa Drives’ experience in high-efficiency fan and BLDC platforms across multiple applications
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Drive input voltage | 180 to 300 | Vac |
| Drive input frequency | 50 | Hz |
| Drive input current (max.) | 1 | Arms |
| Drive efficiency | >92.5 | % |
| Motor voltage | 230 (3-phase BLDC) | Vac |
| Motor input power (fan) | 110 | W |
| Control method | FOC (field-oriented control) | – |
| Speed command | Analog input (potentiometer) | – |
| Indication | Fault LED | – |
| Auxiliary motor control | 1-phase / 5 W (water circulation) + 1-phase / 5 W (louver) | – |
| Operating temperature | 0 to 50 | °C |
| Relative humidity (max.) | 95 (non-condensing) | % |
| Standards (reference) | IEC 61800-3, IEC 61800-5 | – |
Enquiry Note
If you are interested, please share a few lines about your product, motor rating and supply voltage. We will review your requirement, map it to the closest Versa motor–drive platform and get back to you with next steps.
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