GESHI YVF2 Aluminum Motor 0.12-7.5kW Constant Torque

The GESHI YVF2 aluminum-housing square-frame variable frequency three-phase induction motor operates across a power range of 0.12 kW to 7.5 kW within frame sizes H63 through H132. Designed to deliver constant torque from 5 Hz to 50 Hz and constant power from 50 Hz to 100 Hz, this motor integrates directly with standard sinusoidal pulse width modulation variable frequency drives. It provides a reliable mechanical and electrical solution for industrial machinery requiring variable speed control without losing low-end torque output.

When machine builders and plant engineers configure adjustable-speed drive trains, finding an electric motor that balances thermal stability, low frame weight, and dimensional interchangeability remains a critical challenge. Standard induction motors often suffer from excessive stator temperature rise when operated continuously at low frequencies under heavy loads due to reduced internal cooling fan velocity. To counteract this, modern variable frequency drive applications demand dedicated inverter-duty machines featuring optimized electromagnetic designs and independent or enhanced thermal dissipation profiles. This aluminum motor series addresses these constraints by combining a lightweight square enclosure with an optimized magnetic circuit, ensuring stable flux generation across a broad speed regulation range. Operating primarily within the drive layer of industrial automation architectures, it translates inverter output frequencies into controlled mechanical rotation while maintaining precise synchronization with upstream programmable logic controllers and frequency converters.

Technical Specifications

Rated Power: 0.12 kW - 7.5 kW @ 50 Hz

Frame Size: H63 - H132 @ Ambient 20.0 °C

Speed Regulation Range: 5.0 Hz - 100.0 Hz @ Constant Torque and Power

Constant Torque Range: 5.0 Hz - 50.0 Hz @ Rated Current

Constant Power Range: 50.0 Hz - 100.0 Hz @ Rated Voltage

Mounting Configurations: B3, B5, B14, B35, B34 @ Standard IEC Dimensions

Insulation Class: Class F @ 155.0 °C Thermal Threshold

Enclosure Protection: IP54 / IP55 @ IEC 60034-5

Energy Efficiency Level: IE1 @ 400.0 V / 50 Hz

Inverter Compatibility: SPWM Variable Frequency Drive @ 380.0 V

System Integration and Hardware Setup

Integrating the motor into an automated system requires correct electrical termination and mechanical alignment to prevent premature bearing wear or harmonic interference. Power cables must utilize shielded copper conductors to minimize electromagnetic radiation emission toward sensitive instrumentation lines within the control cabinet. The motor frame must feature a secure low-impedance ground connection bonded to the main system earth bar to eliminate high-frequency leakage currents induced by the pulse width modulation switching carrier. When connecting to the inverter output terminals, maintain proper phase sequence alignment to establish the desired rotational direction before running system identification routines. Mechanical installation onto mounting plates via B3 or B5 configurations demands precise shaft collinearity check using dial indicators to prevent radial load stress on the internal rotor bearings.

Reliability and Environmental Durability

The cast aluminum housing provides high thermal conductivity, transferring internal stator heat rapidly to the surrounding ambient air while resisting atmospheric corrosion in humid plant environments. Internal windings receive vacuum pressure impregnation treatment with Class F insulating varnish, guarding against moisture ingress, chemical vapor exposure, and partial discharge degradation during high-voltage switching transients. The standard shaft seals and gasketed terminal boxes achieve IP54 or IP55 protection ratings, preventing airborne particulate and water splash intrusion during routine washdown procedures. Designed for continuous S1 duty cycles, the integrated cooling fan maintains consistent airflow across the square ribbed exterior profile even when operating at reduced speeds, ensuring extended mean time between failures across demanding industrial operational cycles.

Selection Guidance and Alternative Options

Choosing the appropriate motor size involves evaluating the load torque profile, duty cycle acceleration rates, and maximum operating frequency required by the driven mechanical equipment. When your application requires a compact footprint with high thermal dissipation efficiency, this aluminum frame series provides an optimal match for standard IEC mounting interfaces. For specialized retrofits or custom dimensional layouts, Beijing Zhongping Technology maintains local application engineering support to assist with cross-reference selection and direct stock replacement matching. Engineers can cross-check existing operational parameters such as rated current, shaft diameter, and flange dimensions against alternative frame sizes to ensure seamless mechanical interchangeability without redesigning existing machine chassis structures.

Frequently Asked Questions (FAQ)

1. What is the current local inventory availability and delivery lead time for these motors?

Beijing Zhongping Technology maintains regional warehouse stock for standard frame sizes from H63 to H132, supporting same-day dispatch for urgent plant maintenance requirements.

2. What warranty coverage and RMA return procedures apply to this product line?

All units include a 12-month manufacturing defect warranty backed by pre-shipment electrical testing, with rapid local replacement processing managed through Beijing Zhongping Technology service channels.

3. What is the precise voltage and frequency operating envelope for these motors?

The motors operate on standard three-phase supplies at 380 V, 50 Hz, designed to handle variable frequencies from 5 Hz up to 100 Hz when paired with an appropriate SPWM inverter.

4. Are there special electromagnetic compatibility or shielding requirements for the power cabling?

Power supply lines running from the variable frequency drive to the motor terminals should employ armored or shielded symmetrical cables to suppress high-frequency electromagnetic interference.

5. What environmental protection ratings and maximum ambient operating temperatures are supported?

The assembly meets IP54 or IP55 ingress protection standards and operates reliably within ambient temperatures ranging from -15 °C to 40 °C under normal conditions.

6. Which mounting configurations are available for direct mechanical retrofitting?

The series supports B3 foot mount, B5 flange mount, B14 face mount, and combined B35 or B34 configurations to match legacy mounting hole patterns.

7. What routine maintenance steps are recommended to ensure long operational lifespan?

Regular inspections should check terminal box tightness, ground wire integrity, cooling rib cleanliness, and bearing acoustic performance during scheduled preventive maintenance windows.

8. Can these motors be integrated directly with standard vector control drives without custom parameter tuning?

The units operate effectively with standard variable frequency drives, though performing a dynamic or static motor auto-tuning routine on the drive ensures optimal flux vector control precision.