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Permanent Magnet Synchronous Motors

Permanent magnet synchronous machines from line-start general purpose through high-speed direct drive and low-speed gearless drive systems.

TYC Series

Line-start PM synchronous

GB 30253 grade 1 / 25.5–55 kWLine start

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TYP Series

Variable-frequency PM synchronous

0.37–315 kWWide frequency rangeEncoder option

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GTYP Series

High-speed direct drive, air cooled

1–185 kW333–833 HzDirect drive

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GTYPS Series

High-speed direct drive, water cooled

1.1–200 kWWater cooledIP67 option

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DZTYP Series

Low-speed direct drive

30–160 kWIP67Gearbox deleted

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TYPL Series

Flameproof PM for progressive cavity pumps

8.4–55 kWVertical hollow shaftFlameproof

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CYJTYP Series

Beam pump semi-direct drive

15–75 kWBelt drive deletedFlat rotor

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Technical articles on these series

LEADGO Permanent-Magnet Motor Families: How to Choose

A buyer map of LEADGO permanent-magnet motor families by starting method, speed control, load type, mechanical arrangement and site conditions.

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Permanent-Magnet Motor Questions Buyers Ask Before Ordering

Straight answers about PMSM drives, starting, field weakening, demagnetization, maintenance, efficiency and replacement decisions.

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Interior Permanent Magnet Motors vs Surface Magnet Rotors

An IPM rotor is electrically salient and a surface-magnet rotor is not. That decides reluctance torque, field weakening and line starting.

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Permanent Magnet Demagnetization: When Damage Becomes Irreversible

What causes permanent-magnet motor demagnetization, why no single temperature defines the limit, and how buyers can prevent and diagnose it.

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Permanent Magnet vs Induction Motors in Oilfield Duty

Where permanent-magnet synchronous motors genuinely beat induction motors in oilfield service, where they do not, and the demagnetisation limit that decides it.

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Cement Decarbonisation: Where Motor Upgrades Actually Pay

A cement plant runs 150+ motors across four process stages. Three retrofit routes carry measured savings; which one fits depends on what is installed.

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Motor Failure Modes in Mining, Ranked by How Often They Come Up

Overheating and demagnetisation dominate mining motor failure talk. One of the two is specific to permanent-magnet machines and must be designed out early.

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Cogging Torque in Permanent-Magnet Motors

Practical engineering guidance on cogging torque in permanent-magnet motors, including the checks, evidence and common mistakes that matter before purchase o

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Encoder Selection for PMSM Drives

Practical engineering guidance on encoder selection for pmsm drives, including the checks, evidence and common mistakes that matter before purchase or commis

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Field Weakening in a PMSM

Practical engineering guidance on field weakening in a pmsm, including the checks, evidence and common mistakes that matter before purchase or commissioning.

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How Permanent-Magnet Motors Start

Practical engineering guidance on how permanent-magnet motors start, including the checks, evidence and common mistakes that matter before purchase or commis

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Line-Start PM Motors: Permanent Magnet Efficiency Without a Drive

A rotor carrying both a cage and magnets starts like an induction motor and runs synchronously. The catch is what the magnets do during the start.

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Oilfield Electric Drive vs Gas Engine: A Decision Framework

A practical framework for comparing electric motors and field-gas engines on pumpjacks and other oilfield surface equipment.

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PMSM Commissioning Checklist

Practical engineering guidance on pmsm commissioning checklist, including the checks, evidence and common mistakes that matter before purchase or commissioni

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Efficiency Grades for Permanent-Magnet Synchronous Motors

How buyers should read Chinese PMSM efficiency grades, test scope and operating-point data without confusing a motor class with system efficiency.

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Where Synchronous Machines Are Used, and Why

Exact synchronous speed is the least interesting thing about these machines. What earns them a place is that you can choose the power factor.

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Cooling Tower Fan Drives: Direct Drive or Gearbox, and What Decides It

The choice is about a drive train, not a motor. And whether the fan sits in the entering or the leaving airstream decides what the machine lives in.

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Sensorless Control: When You Can Skip the Encoder

Back-EMF estimation weakens at low speed, while signal injection depends on motor saliency and drive capability. Here is when an encoder still matters.

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High-Speed PM Motor vs Roots Blower: Compare the Air System

A system-level comparison of high-speed permanent-magnet centrifugal blowers and Roots blowers for industrial air applications.

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Screw Compressor Motors: High-Speed PM or Conventional Drive?

A practical comparison of high-speed permanent-magnet and conventional motor arrangements for industrial screw-compressor packages.

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Artificial Lift Motors: Beam Pump, PCP and ESP Compared

Three lift methods, three different motor problems. The load shape decides the machine — and on two of the three, the rating is set by starting, not running.

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How to Size a Motor for a Beam Pump: A Three-Step Guide

Sizing a beam pump motor is not a power-table lookup. Get the stroke load, the drive topology and the site check right — and in that order.

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Oilfield Motors Starting at Low Temperature

Practical engineering guidance on oilfield motors starting at low temperature, including the checks, evidence and common mistakes that matter before purchase

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Oilfield Voltage Fluctuation and Motor Protection

Practical engineering guidance on oilfield voltage fluctuation and motor protection, including the checks, evidence and common mistakes that matter before pu

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Starting a PCP System: Torque and Ramp Time

Practical engineering guidance on starting a pcp system: torque and ramp time, including the checks, evidence and common mistakes that matter before purchase

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Pumpjack Torque Curves and Motor Sizing

Practical engineering guidance on pumpjack torque curves and motor sizing, including the checks, evidence and common mistakes that matter before purchase or

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Cyclic Loading in Rod-Pump Motors

Practical engineering guidance on cyclic loading in rod-pump motors, including the checks, evidence and common mistakes that matter before purchase or commis

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Drive System Efficiency: IE for the Motor, IES for the System

Three efficiency classes can appear on one variable speed drive, and they are not the same scale. The motor class tells you least about the bill.

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PI Controller Tuning for Motor Drives: A Practical Starting Method

How motor-drive engineers set PI gains, why modulus optimum is only a starting point, and what must be verified during commissioning.

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VFD Retrofit: Keep the Induction Motor or Move to PM?

An existing variable-speed drive is five parts, not one. Which of them a motor swap puts back in play is what decides this — not the motor comparison.

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Speed Loop vs Current Loop: Why Motor Drives Use Nested Control

A clear explanation of cascaded motor-drive control, including the roles of the current loop, speed loop, limits and commissioning order.

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Why We Rebuilt Our Motor Manuals to ANSI Z535

A real manual audit found an electrical hazard formatted with the same visual weight as a packaging note. Here is what ANSI Z535 signal words fix.

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Replacing a Fan Motor: Why Matching the Nameplate Power Is Not Enough

Fan power rises with the cube of speed. A replacement motor running 2% faster asks for about 6% more shaft power, and nothing on the nameplate warns you.

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PM Direct-Drive Motors for PCP Systems: What Changes

How a low-speed permanent-magnet direct drive changes a progressive cavity pump surface drive, and what buyers must verify before retrofit.

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Pumpjack Motor Troubleshooting: From Noise to Nuisance Trips

A field triage framework for pumpjack motor noise, vibration, overheating and trips that separates motor faults from the pumping-unit load.

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Comparing across families, or filtering by power, voltage and protection?See the full range with filters. If the duty falls outside what these series publish, tell us the application — custom builds cover ratings the standard series do not.