Custom AC Induction Motor 42Y 42mm Capacitor start Factory, Manufacturers- Suzhou Retek Electric Technology Co., Ltd

Principles of the 42Y Capacitor-Start AC Induction Motor

The 42Y (42mm frame size) AC Induction Motor with a Capacitor-Start configuration is a simple, cost-effective motor for single-phase operation.

The key technical feature is the starting mechanism: an auxiliary winding in series with a capacitor is used to create a phase shift, generating the necessary rotating magnetic field to initiate rotation. Once the motor reaches about 75% of its synchronous speed, a centrifugal switch or an electronic relay disconnects the start winding and capacitor, leaving the motor to run solely on the main winding. This design provides high starting torque necessary to overcome static friction and inertia in low-power applications.

Introduction

Detailed Parameters and Performance Data

RETEK: Reliable and Cost-Optimized AC Drives

Suzhou Retek Electric Technology Co., Ltd. provides the 42Y series for high-volume consumer and commercial products that demand a low-cost, reliable, and easily connected drive. The simplicity of single-phase AC power input eliminates the need for complex DC drivers or inverters. Our manufacturing ensures precise winding symmetry and centrifugal switch reliability, which are key to the motor's long service life and consistent starting performance.

Applications

Advanced Technology Highlights

Key Applications for 42Y AC Induction Motors

Small Pumps and Blowers: Drives for simple circulation pumps, extractors, and low-pressure air handlers. Challenge: High starting torque required for impeller inertia.
Domestic Appliances: Motors for clothes dryers, small power tools, and basic kitchen equipment.
Vending and Dispensing Machines: Drive mechanisms that require momentary, high-torque starts.
Office Automation: Paper feeders and shredders.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (42Y AC Induction)

Parameter	Range / Typical Value	Unit
Frame Size (NEMA)	42Y	Standard
Phase / Frequency	Single-Phase / 50 or 60	Hz
Starting Method	Capacitor-Start	Type
Output Power	Up to 100	W
Continuous Speed	Synchronous Speed minus Slip	RPM

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

Our production includes automated winding of the main and auxiliary coils and rigorous testing of the start switch cutout mechanism to ensure timing accuracy and reliability.

Capacitor Selection: Fine-tuning the start capacitor value to match the inertia and starting torque requirements of the client's specific load (e.g., a high-inertia blower fan).
Thermal Protection: Integrating automatic reset thermal protectors (TCOs) directly into the winding for fail-safe protection against overheating.
Mounting Interface: Customizing the motor base or flange (e.g., footed, C-face) to fit specific machine mounting requirements.
Shaft Modification: Providing custom output shafts, including specialized lengths, diameters, and threads for impellers or couplings.

Service & Support

Technical Advantages and Core Design Features

High Starting Torque: The capacitor-start design maximizes the torque available at zero speed, ensuring reliable startup under load.
Simple Single-Phase Operation: Requires only standard single-phase AC voltage, eliminating the need for expensive frequency converters or DC power supplies.
Rugged Construction: The squirrel-cage rotor is inherently robust and requires no electrical connection (no brushes or commutator), leading to high reliability and low maintenance.
Constant Speed Operation: Operates near a constant speed determined by the line frequency and pole count, which is ideal for fixed-speed loads like pumps.
Cost-Effectiveness: The mature and simple design of the induction motor offers a low-cost power source for high-volume production.

Frequently Asked Questions

Common Inquiries Regarding 42Y AC Induction Motors

Q: What is the purpose of the capacitor in a capacitor-start motor?
A: The capacitor shifts the phase of the current in the auxiliary (start) winding by 90∘ relative to the main winding. This creates a two-phase field, which is necessary to produce the rotating magnetic field required to initiate the rotation of the single-phase motor.

Q: What happens if the centrifugal switch fails?
A: If the switch fails to open, the start winding and capacitor remain energized. This is not designed for continuous operation and will lead to rapid overheating and failure of the start winding due to excessive current and thermal stress. If the switch fails closed, the motor cannot start.

Q: Can the speed of this AC Induction motor be controlled?
A: Traditional AC induction motors are fixed speed. Variable speed requires a dedicated Variable Frequency Drive (VFD), which increases system complexity and cost. For simple speed control, a shaded pole or DC motor is usually a better alternative.

Resources

Advanced Material Selection Guide

Stator Laminations: Uses low-carbon steel laminations for good magnetic permeability and flux concentration.

Rotor: Die-cast aluminum squirrel cage rotor, providing an extremely rugged and maintenance-free electrical design.

Capacitor: High-quality electrolytic (for start) or polypropylene film (for run) capacitors, selected for stability and duty cycle. The start capacitor has a large microfarad value for high starting torque.

About Jiangsu Retek Motion Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China AC Induction Motor 42Y 42mm Capacitor start Manufacturers and Wholesale AC Induction Motor 42Y 42mm 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!

Customized Solutions

Quality Assurance

Global Export

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