YR 3 Phase Slip Ring Motor

PUTAI YR 3 Phase Slip Ring Motors cover 160–7200 kW, frame sizes H355–H1120 and rated voltages from 3 kV to 11 kV. They serve OEMs, industrial motor distributors, project integrators and plant operators in heavy industrial drive and replacement projects.

The wound rotor connects to an external circuit through slip rings and brushes, allowing external rotor resistance to be used during starting. The motor and starter should be matched to the driven load, starting torque, acceleration time, load inertia and starting frequency.

FRAME

ROTOR

SILICON STEEL STATOR CORE

Ball Mills
For ore grinding, mineral processing and cement grinding, the motor and starting system must account for mill inertia, starting load conditions and required acceleration time.

Crushers
For mining, mineral processing and cement plants, suitability depends on crusher type, loaded-start requirements, starting frequency and drive-train limits.

Belt Conveyors
For bulk materials such as ore, aggregates and cement, consider conveyor load, inertia, acceleration requirements and coordination between multiple drives where applicable.

Exhaust Fans and Industrial Ventilation
For large ventilation systems in cement, metallurgy and petrochemical facilities, relevant factors include fan inertia, starting time, operating duty and permissible starting current.

Steel Rolling Mill Equipment
For rolling-mill drives, the motor specification should reflect operating cycles, load changes, acceleration requirements and the starting-system arrangement.

Industrial Compressors
The compressor type, start-up load, required speed and starting sequence must be considered when assessing motor and starter compatibility.

PUTAI supplies industrial motors, starters/drives, spare parts and accessories. The YR series can be considered for OEM integration, distributor orders and replacement projects, subject to confirmation of the required configuration and supply scope.

OEMs and Equipment Integrators
For new equipment, specify the motor and starting system as a coordinated package. Provide the driven-machine type, output, voltage, frequency, speed, starting method, load inertia, acceleration time and starting frequency where known. Include mounting, shaft and coupling dimensions, cooling, protection, insulation and required accessories.
These details help align the motor with the machine, starter and installation. Confirm the final configuration against approved technical specifications and drawings.

Distributors and Project Suppliers
For project quotations, provide the end user's application, motor ratings, installation requirements and documentation needs. PUTAI's range of motors, starters/drives and related parts may support projects requiring multiple drive products; availability and supply scope should be confirmed for each order.

Replacement Projects
Do not match a replacement motor by power and voltage alone. Provide the original nameplate and model, installation photos or drawings, shaft and base dimensions, coupling details, rotor-circuit and starter information, cooling, protection, insulation and duty requirements. Any changes to the driven machine or power supply should also be identified. Compatibility must be checked against the original installation and starting arrangement.

PUTAI reports a 200,000 m² production plant, more than 120 employees including 18 technical engineers, over RMB 80 million in equipment, tooling and other fixed assets, and more than 25 years of motor-industry experience.

Its published production process includes copper winding, insulation treatment, vacuum-pressure impregnation (VPI) and drying where applicable, motor assembly and testing before dispatch. The actual manufacturing route and inspection scope for a YR motor depend on the approved configuration.

Depending on the agreed order scope, documentation may include motor data sheets, outline or installation drawings, inspection records and applicable test reports. Confirm required tests and deliverables before order approval. Efficiency, certification and standards-compliance claims should be supported by documentation applicable to the supplied motor.

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