Single Phase Dual-Capacitor Asynchronous Motors

Product Overview

Copartner Technology Co.,Ltd., a reputable China-based motor manufacturer established in 2003, leads the market in developing and supplying high-quality Single Phase Dual-Capacitor Asynchronous Motors—specifically the flagship ML series. Backed by a 30,000 sq. meter production facility, a team of over 150 professionals, and 13+ senior engineers with 20+ years of industry experience, the company adheres to strict quality control to ensure each motor meets global standards.

The ML series aluminum housing single-phase dual-capacitor asynchronous motors feature a fully optimized, modern design, crafted from premium-grade materials and fully compliant with the IEC standard—a key requirement for international market access. These motors are engineered to address the demand for reliable, efficient performance in environments where only single-phase power is available, with core specifications that set them apart: rated output ranges from 0.12kW to 4.00kW (0.16Hp to 5.5Hp), rated speed spans 1350rpm to 2850rpm, and power factor stays between 0.90 and 0.95.

What makes the ML series stand out is its balance of durability and versatility. The aluminum frame, end shields, and base reduce weight while enhancing corrosion resistance, making the motors suitable for both indoor and semi-outdoor applications. Whether powering industrial machinery or household appliances, these motors deliver consistent performance with minimal maintenance, aligning with global energy efficiency trends and user cost-saving goals.

Product Features

High Starting Torque for Heavy-Duty Operations

A defining advantage of the ML series single phase dual-capacitor asynchronous motors is their enhanced starting capability, thanks to the integrated dual-capacitor design. The motors deliver 1.8~2.5 times the rated torque at startup—critical for driving equipment with high initial load demands, such as compressors, pumps, and small machine tools. This design also boosts operational efficiency by ensuring smooth power transition from startup to steady-state, reducing energy waste during peak load periods.

Low Noise & Compact Design for Space-Sensitive Environments

Noise reduction and space efficiency are central to the ML series’ design. The motors operate at a noise level of 65~83 dB(A)—significantly lower than many competitors—making them ideal for noise-sensitive settings like commercial kitchens, retail spaces, and residential areas. Their compact aluminum housing further enhances versatility: the lightweight structure (enabled by aluminum components) allows easy installation in tight spaces, such as under-counter refrigeration units or small workshop machinery, without compromising performance.

Durable Construction with IP Protection

Built for long-term reliability, the ML series features a rugged build with IP54/IP55 protection rating—shielding against dust ingress and low-pressure water jets, which is essential for industrial or semi-outdoor use. The aluminum frame, end shields, and base resist rust and wear, while high-strength cable glands prevent moisture or debris from damaging internal components. Additionally, the motors use a superior paint finish that enhances corrosion resistance, ensuring a long service life even in harsh conditions. A heavy-duty service factor further reinforces durability, allowing the motors to handle occasional overloads without performance degradation.

Energy Efficiency for Cost & Environmental Savings

The ML series prioritizes energy efficiency, with an efficiency range of 57.0%~79.0%—a key metric for reducing operational costs and carbon footprints. The optimized winding design and high-quality magnetic materials minimize energy losses, while the 0.90~0.95 power factor ensures efficient use of available single-phase power. For businesses and households alike, this translates to lower electricity bills and compliance with regional efficiency regulations (e.g., EU’s IE3+ standards, North America’s NEMA Premium guidelines).

Applications

Industrial Machinery

The ML series single phase dual-capacitor asynchronous motors are widely used in industrial settings, particularly for equipment that relies on single-phase power. Key applications include:

Pumps and compressors: The high starting torque (1.8~2.5× rated torque) ensures these motors can handle the initial load of fluid or air compression systems.

Small machine tools: Lathes, drills, and grinders benefit from the motor’s compact design and steady speed control (1350rpm~2850rpm), ensuring precise machining.

Conveyor systems: The durable IP54/IP55 construction and low noise operation make the motors suitable for packaging or assembly line conveyors in factories.

Commercial Appliances

In commercial spaces, the ML series excels in applications where reliability and noise control are critical:

Refrigeration units and air conditioners: The low noise level (65~83 dB(A)) and energy efficiency (57.0%~79.0%) make these motors ideal for grocery store freezers, restaurant coolers, and office AC systems.

Ventilation fans: The compact design fits into ductwork or ceiling fans, while the aluminum housing resists moisture in humid environments (e.g., commercial kitchens).

Commercial washing machines: The motor’s durability and consistent torque handle the heavy loads of laundry facilities in hotels or laundromats.

Home Appliances

For household use, the ML series addresses the need for compact, efficient, and quiet motors:

Washing machines and dryers: The motor’s lightweight aluminum design and smooth operation reduce vibration, while the dual-capacitor system ensures reliable startup for heavy laundry loads.

Power tools: Drills, saws, and grinders benefit from the motor’s high torque and energy efficiency, extending battery life (for cordless tools) or reducing electricity use (for corded models).

Kitchen appliances: Blenders, food processors, and garbage disposals rely on the motor’s compact size and low noise to fit under countertops and avoid disrupting home environments.

FAQ

Q: What makes COPARTNER’s ML series motors suitable for global markets?

COPARTNER’s ML series single phase dual-capacitor asynchronous motors comply with the IEC standard—a global benchmark for motor safety and performance. They also meet regional efficiency regulations, such as the EU’s IE3+ requirements and North America’s NEMA Premium standards, ensuring seamless market access. Additionally, the motors use high-quality materials (e.g., aluminum housing, corrosion-resistant coatings) and undergo strict quality testing, making them durable for diverse climates (from humid Asia to dry North America).

Q: How do the dual capacitors in the ML series improve performance?

The dual-capacitor design includes two specialized capacitors: 10μF~60μF running capacitors (for steady-state efficiency) and 30μF~600μF starting capacitors (for boosting initial torque). The starting capacitor provides the extra power needed to overcome high startup loads (e.g., compressor pistons), while the running capacitor maintains efficient energy use during operation. This combination reduces energy waste, extends capacitor lifespan, and ensures smooth motor performance across all load levels.

Q: Can the ML series motors operate in harsh environments?

Yes. The ML series features an IP54/IP55 protection rating, which shields against dust ingress and low-pressure water jets—making them suitable for semi-outdoor or dusty environments (e.g., construction sites, agricultural sheds). The aluminum frame and superior paint finish also resist rust and corrosion, while the high-strength cable glands prevent moisture from damaging internal components. For extremely harsh conditions, COPARTNER offers customizations (e.g., higher IP ratings) upon request.

Q: How do I select the right ML series model for my equipment?

To choose the correct model, focus on three key specifications:

Rated output: Match the motor’s power (0.12kW~4.00kW) to your equipment’s load (e.g., 0.75kW for small compressors, 2.2kW for commercial washing machines).

Rated speed: Select a speed (1350rpm~2850rpm) that aligns with your equipment’s needs (e.g., 1350rpm for fans, 2850rpm for high-speed drills).

Voltage compatibility: Ensure the motor works with your region’s single-phase voltage (e.g., 220V for Asia/Europe, 110V for North America). COPARTNER’s technical team can also assist with model selection based on specific application requirements.

Q: What maintenance steps are required to extend the ML series motor’s lifespan?

Regular maintenance ensures the ML series motors last 10+ years (with proper care). Key steps include:

Lubrication: Apply high-temperature grease to bearings every 6~12 months to reduce friction and wear.

Cleaning: Remove dust or debris from the motor’s exterior and vents to prevent overheating (critical for maintaining efficiency at 57.0%~79.0%).

Voltage checks: Ensure the power supply is stable (avoid voltage unbalance) to prevent electrical damage to windings.

Capacitor inspection: Replace capacitors if the motor struggles to start (look for bulging or leaking in the 10μF~60μF running or 30μF~600μF starting capacitors).