Product OverviewThe BPYZ series are three-phase asynchronous motors specifically designed for hoist (crane) and heavy-duty port/terminal applications. Manufactured to national stan

Product Overview

The BPYZ series are three-phase asynchronous motors specifically designed for hoist (crane) and heavy-duty port/terminal applications. Manufactured to national standard dimensions and compatible with both variable-speed drives (VSD) and direct-online (DOL) starting, these motors deliver excellent low-frequency high-torque performance, reliable mechanical strength, good thermal stability, and comprehensive protection & monitoring interfaces. They are suited for bridge/portal cranes, port handling equipment, and other heavy-load lifting and material handling scenarios with frequent start/stop cycles and shock loads.

Key Technical Features

• Electromagnetic and mechanical design optimized for hoist duty to ensure high starting torque and stable constant-torque behavior at low frequencies (≤ 5 Hz), meeting demands of frequent start/stop and heavy shock loading.

• Supports VSD operation across 5–100 Hz and is also suitable for DOL starting. For VSD systems we recommend shaft-grounding / bearing protection and output filtering as appropriate to extend bearing and insulation life.

• Cooling: selectable IC411 (natural ventilation) or IC416 (forced ventilation) to accommodate varied installation spaces and heat-dissipation requirements. Duty basis is S1 (continuous), with design adaptations available for specific lift/brake cycles.

• Frame sizes cover H80 – H450; rated power 0.75 – 315 kW; pole counts 2P–8P; rated voltage 380 V / 660 V (dual-voltage wiring on request).

• Robust construction with reinforced shafts and bearing housings for excellent vibration and shock resistance. Frames ≤ 225 use sealed bearings; frames > 225 use regreaseable or oil-lubricated bearing arrangements to suit continuous heavy-duty operation.

• Standard ingress protection IP55, optional higher protection (IP56 / IP65) and anti-corrosion treatments for marine/outdoor use.

• Optional motor brakes (permanent-magnet disc or spring-applied), coupling flanges, brake control interfaces and brake tuning devices for power-off holding and positioning.

• Rich monitoring & protection options: PT100/PT1000 temperature sensors, thermistors, vibration sensors, speed encoders, insulation monitoring, shaft-current/end-voltage protection interfaces — enabling online condition monitoring and predictive maintenance.

• Manufacturing and inspection adhere to national standards and internal QC: dynamic balancing, temperature rise, vibration and no-load/load tests to ensure delivered performance and long-term reliability.

Main Technical Data

Typical Applications

Designed for hoisting and heavy port handling equipment, typical uses include: main and auxiliary hoist motors for bridge and gantry cranes, drum drive and travel motors, quay cranes, ship-to-shore cranes, container handling equipment, and other applications requiring frequent starts, low-speed high-torque operation and accurate positioning.

Selection & Installation Recommendations

• Provide the following when requesting a quote or selecting a motor: maximum lift load, required starting torque, duty cycle (lifting/braking frequency), inertia ratio, installation orientation & space constraints. These parameters are essential to select proper power, poles and braking configuration.

• For VSD applications and long cable runs, consider dv/dt or LC output filters and shaft grounding measures to reduce bearing currents and insulation stress. Consult our engineers for recommended cable types and inverter settings.

• If power-off holding or precise positioning is needed, specify brake requirement; we recommend selecting motor brakes (type and torque) and including brake control interfaces and tuning parameters in the specification.

• For continuous heavy duty, use regreaseable or oil-lubricated bearings and implement a lubrication/condition-monitoring schedule.

• For outdoor or marine installations choose higher IP rating and anti-corrosion surface treatments; cable glands and earthing must meet industry sealing and safety standards.

• Installation must follow relevant hoist and explosion-proof (if applicable) electrical and mechanical installation codes for safety and inspection compliance.

Factory Testing & Quality Assurance

Each BPYZ motor is factory tested with a full QC program that typically includes: visual & component inspection, dynamic balancing, insulation resistance and high-voltage tests, no-load and load testing, temperature rise testing, vibration & noise measurement, and (if equipped) brake performance tests. Supplied documentation includes: Certificate of Conformity, Factory Test Report, Wiring Diagram, Brake & Control Instructions, Installation & Maintenance Manual. On-site commissioning, run-in and technical support can be provided per contract.

Ordering Information

When ordering please specify: model (BPYZ), frame size, rated power, pole count, rated voltage, cooling method (IC411 / IC416), mounting orientation (horizontal / vertical), required brake (yes/no: type & torque), output shaft type, cable entry orientation, bearing insulation/shaft earthing requirement, required sensors (temperature / vibration / encoder), and any special environmental conditions (high altitude / high temp / marine corrosion). Request for 2D/3D mounting drawings, test reports or on-site technical support should be included in the inquiry.

Custom Solutions

We offer customization (special shaft ends, non-standard protection, integrated braking & monitoring packages) and can optimize motor design in coordination with the user’s control system and duty cycle to maximize system reliability and lifetime.