PMDD Motor
PMDD MotorDirect-Drive Engineering & RFQ
All product topicsDivision 2 · Heavy Industrial & Gearless Retrofit

Cooling tower direct-drive assessment

Assess fan load, operating speed, mounting, environment, and drive requirements before considering a gearbox replacement. Suitability and any energy impact require project data.

Illustrative geared and gearless direct-drive architecture comparison; not a fit guarantee.
Illustrative geared and gearless direct-drive architecture comparison; not a fit guarantee.

Project scope and evidence

This is an inquiry-planning page, not a product specification or stock listing. It does not establish a model, rated performance, certification, manufacturing capability, test facility, or compatibility. Those details must be supported by current supplier documents and confirmed for the project before quotation.

What to include in an inquiry

These are requested project inputs, not a statement that a matching product is available.

  • Existing motor rated power (kW / HP), pole count, and gearbox reduction ratio
  • Target fan hub speed (90 / 110 / 130 / 160 / 200 / 250 / 300 / 360 RPM) and fan diameter (m)
  • Plant grid voltage and frequency (380V / 400V / 460V / 690V, 50Hz / 60Hz)
  • Mounting orientation (Vertical V1 / V3 or Horizontal B3 / B35), shaft extension dimensions, and max allowable weight
  • Required ingress protection (IP55 / IP67) and VFD cabinet scope (Motor Only vs. Matched Motor + VFD Package)
  • Annual operating hours and local electricity rate ($/kWh) if a project-specific energy & payback model is requested

What needs to be checked

  • Continuous and peak load, speed range, duty cycle, and operating conditions.
  • Mechanical envelope, mounting, shaft or bore interface, and installation constraints.
  • Thermal path, cooling, feedback, controls, and required documentation.
  • Supplier identity, model-specific evidence, commercial scope, and delivery schedule.

Frequently asked questions

Does this page confirm a standard model or current stock?

No. Availability, model ratings, drawings, certifications, test records, supplier identity, and lead time are confirmed for the specific project and stated in the formal quotation.

Is a direct-drive motor suitable for every geared application?

No. The load torque and speed, duty cycle, mounting interface, thermal path, controls, and service environment need to be reviewed before a direct-drive arrangement is selected.

How should I request an engineering review?

Share the application, operating point, interface drawing or existing equipment data, required documentation, quantity, and destination. The supplier and available evidence are confirmed before a quotation is issued.

Related engineering topics

Direct to PMDD Application Engineering Desk | WhatsApp: +86 188 5797 1991Division 2 · Cooling Tower & Gearless Retrofit Assessment Desk

Share your target torque/speed, OD/ID or IEC frame envelope, or reference part number to initiate a project-specific engineering and RFQ scope review.

Direct Engineering Email (RFQ & CAD)

inquiry@pmddmotor.com

Direct-drive retrofit suitability depends on load torque, speed, and mounting constraints; share nameplate data to confirm mechanical and electrical fit per project.

Instant Application Engineer WhatsApp

+86 188 5797 1991

WhatsApp Nameplate Photo for Feasibility Check

Share nameplate photos, reference part numbers (Kollmorgen / TQ / Celera), or OD/ID limits for an engineering scope review.

Global B2B Technical Inquiry Desk: Product availability, ratings, CAD files, test evidence, supplier identity, and commercial terms are confirmed per project.NDA-Ready STEP / DXF Review · Specifications & Supply Scope Confirmed per Project
Engineering Desk · +86 188 5797 1991