The 70Y Capacitor-Start AC Induction Motor: Commercial Power
The 70Y (70mm frame size) AC Induction Motor is a single-phase workhorse designed for medium-power commercial applications, often delivering continuous output from 100W to 300W.
Utilizing the Capacitor-Start configuration, this motor provides substantially higher starting torque than a split-phase or shaded-pole design. The larger frame accommodates heavier gauge windings, improving thermal capacity and allowing the motor to handle higher inertial loads upon startup. The design relies on a reliable centrifugal switch mechanism to disconnect the auxiliary start winding once operational speed is reached, ensuring smooth and efficient running on the main winding.
Introduction
Detailed Parameters and Performance Data
RETEK: High Reliability for Commercial Equipment
Suzhou Retek Electric Technology Co., Ltd. supplies the 70Y series to OEMs requiring a robust, fixed-speed AC motor for continuous duty. We prioritize the reliability of the centrifugal switch and capacitor selection, which are the two most critical components for the motor's longevity. This series is a cost-effective, durable solution for equipment that requires easy installation and low maintenance across global AC voltage standards (110V or 220V).
Applications
Advanced Technology Highlights
Mid-Range Applications for 70Y AC Induction Motors
- Commercial Ventilation and Blowers: Motors for HVAC air handlers, industrial kitchen ventilation, and forced-air cooling systems. Challenge: High inertia and air resistance at startup.
- Small Compressors and Vacuum Pumps: Driving reciprocating or rotary compressors requiring high starting torque under residual pressure.
- Woodworking Machinery: Motors for benchtop sanding machines, small lathes, and light-duty saw blades.
- Large Domestic Appliances: High-capacity washing machines or industrial floor cleaners.
Technical Specifications
Industrial & Commercial Usage
Technical Parameters (70Y AC Induction)
| Parameter | Range / Typical Value | Unit |
| Frame Size (NEMA) | 70Y | Standard |
| Starting Torque Ratio | 200-300% of Rated Torque | Factor |
| Output Power | 100 to 300 | W |
| Nominal Voltage | 110 / 220, Single-Phase | VAC |
| Insulation Class | B or F | Rating |
Additional Information
Supplementary Details & Notes
Integrated Production and Customization Workflow
Production focuses on precise balancing of the squirrel-cage rotor and validation of the motor's full load current and temperature rise to ensure compliance with the target thermal class.
- Enclosure Type: Customizing the motor enclosure (e.g., TEFC - Totally Enclosed Fan Cooled or ODP - Open Drip Proof) to suit the operating environment.
- Winding and Pole Count: Tailoring the pole count (e.g., 2-pole for high speed, 4-pole for standard speed) to achieve the exact RPM required at the operating frequency.
- Integrated Thermal Protection: Factory-integrating the correct thermal overload protection device (e.g., manual reset button or internal thermal switch) per client specifications.
- Terminal Box: Providing customized terminal box configurations for easy and safe wiring termination in the field.
About Suzhou Retek Electric Technology Co., Ltd.
As China AC Induction Motor 70Y 70mm Capacitor start Manufacturers and Wholesale AC Induction Motor 70Y 70mm Capacitor start OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.
Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

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