SAVE ELECTRICITY AND REDUCE LIFTING COSTS WITH A RELIABLE PERMANENT MAGNET MOTOR
 

PERMANENT MAGNET MOTORS

Novomet permanent magnet motor

Our permanent magnet motor (PMM) leads the industry in efficiency and reliability. On average, it reduces electrical submersible pump (ESP) power consumption by 15% compared with AC induction motors. When combined with our energy-efficient pump stages, operators typically see their electric motor power bills drop by 25–30% or more. Our PM motors are currently the most common ESP permanent magnet motor installed in the Americas.

 

It takes energy to produce energy

ESPs are the leader in providing reliable hydrocarbon lift across a wide range of well conditions and applications. As companies have continued to pour millions of dollars into exploration, drilling, and completions technologies, they have not put the same focus on finding more efficient ways to produce hydrocarbons. Over the past decade Novomet has made it our business to find more efficient ways to lift a wide range of fluids, effectively lowering the cost of hydrocarbon production.

 

BENEFITS

Reduce your ESP power bill


Our PMMs reduce power use by 15% alone and by 30% or more when run with our energy-efficient pumps
Improve ESP performance


PMM speed can be adjusted to accommodate a wide range of flowrates and loads
Lose length and weight, not performance

Get 380 HP from a single motor that is 2/3 the length and weight of an AC motor



applications

  • ESPs for conventional and unconventional wells
  • Wide range of flows and pressures
  • Small wellbores and sidetracks
  • Downhole-driven ESPCP and RDCP systems
  • Geothermal pumping systems

capabilities

  • Reduces energy ESP energy consumption
  • Delivers longer runlife by reducing overall system heat
  • Outperforms induction motors in tough conditions including viscous oil, cycling ESPs, marginal wells, fractured wells, and high fluid temperatures

features

  • We offer the smallest PMM available on the market, making it particularly advantageous in SlimLine ESP and Colibri Rigless ESP systems 
  • Reduces the heat generated per unit of power
Permanent magnet motor installation closeup





Electricity loss in asynchronous induction motors

Standard induction motors (also called asynchronous ESP motors) convert three-phase current to an electromagnetic field that spins to create rotation. This rotary energy drives the rotor in an ESP to lift fluid from the reservoir to the surface. All AC induction motors consume electricity to create the electromagnetic field that makes rotation possible. So instead of converting all the electricity they receive to torque, somewhere around 13% of that energy is used to establish and maintain an electromagnetic field, which is typically lost to heat.

The PMM breakthrough

Unlike standard induction motors, the PMM uses rare earth magnets and special circuitry to supply voltage to the stator winding, establishing the motor torque needed to produce rotation with less electricity. This design increases motor efficiency and decreases power consumption by an average of 15%.

The PMM is controlled through proprietary software from the surface that switches electronic keys, or vlaves, on the motor. The variable speed drive (VSD) on the surface enables frequency adjustment so motor speed and net power to the shaft can be adjusted as needed to improve efficiency.

The motor includes a stator with a three-phase winding, a rotor with permanent magnets, a head, and a base. The stator magnetic circuit consists of sheets of electrical steel with a heat-resistant coating that are pressed into a tubular body. The stator winding is a single-layer, lingering reel made of heat-resistant winding wire that is wound in a star pattern to provide a common control point for system settings. The rotor with permanent magnets is installed in the stator bore on sliding bearings.

TECHNICAL CHARACTERISTICS

Permanent magnet motor PMM 3D cutaway view

Low speed (100 - 1500 rpm) PMM for PCPs and Novomet Rotary Displacement Pump

Motor OD

Speed range

Power rating in one section

117 mm

100-1500 rpm

up to 40 KW (@58Hz) 500 rpm

4,60 in

up to 54 hp (@58Hz)

 

PMM rated at 3000 rpm for ESP systems (Conventional + PowerSave)

Motor OD

Speed range

Power rating in one section

103 mm

1000-4200 rpm

6-200 KW  (@100Hz)

4,06 in

10- 320 hp (@120Hz)

117 mm

1000-4200 rpm

12-310 KW (@100Hz)

4,60 in

19-500 hp (@120Hz)

130 mm

1000-4200 rpm

32-300 KW (@100Hz)

5,12 in

50-480 hp (@120Hz)

185 mm

1000-4200 rpm

60-800 KW (@100Hz)

7,44 in

96-1285 hp (@120Hz)

 

PMM rated at 6000 rpm for ESP systems (Conventional + PowerSave)

Motor OD

Speed range

Power rating in one section

55 mm

8500 rpm

Up to 35 KW  (@283Hz)

2,17 in

Up to 47 hp (@283Hz)

81 mm

1000-6000 rpm

4-90 KW (@200Hz)

3,19 in

5-120 hp (@200Hz)

103 mm

1000-6000 rpm

12-280 KW  (@200Hz)

4,06 in

16-375 hp (@200Hz)

117 mm

1000-6000 rpm

12-280 KW (@200Hz)

4,60 in

14-375 hp (@200Hz)

130 mm

1000-6000 rpm

60-644 KW (@200Hz)

5,12 in

80-863 hp (@200Hz)

 

Tandem PMM rated at 6000 rpm for ESP systems (Conventional + PowerSave)

Motor OD

Speed range

Power rating in one section

55 mm

8500 rpm

Up to 70 KW (@283Hz)

2,17 in

Up to 94 hp (@283Hz)

81 mm

1000-6000 rpm

100-200 KW (@200Hz)

3,19 in

135-270 hp (@200Hz)

130 mm

4500 rpm

up to 770 KW (@150Hz)

5,12 in

up to 1030 hp (@150Hz)

High-speed and low-speed flexibility

Our variable speed drives use a unique voltage scheme to produce a wide range of rotation speeds while keeping electricity consumption steady. The result is a motor that is incredibly efficient when operating at typical speeds (500 to 6,000 RPMs), and that can be easily adapted to low speeds (100 to 500 RPMs) for use with low-flow wells and high-viscosity fluids. We have also adapted the PMM to function with progressive cavity pumps (PCPs) to create a highly reliable downhole-driven ESPCP. 

 

PMM advantages

Compared to standard asynchronous induction motors, the PMM:

  • Reduces power consumption by 15% alone, and by up to 30% or more when paired with energy-efficient pumps
  • Improves ESP performance across a wide range of flow rates and loads
  • Enables stable ESP operation by maintaining consistent torque at the shaft regardless of rotation speed
  • Delivers longer runlife by reducing overall system heat
  • Reduces motor length and body weight while maintaining power
  • Delivers 380 HP with a single PMM, eliminating the need for tandem motors in many wells

 

Sizes and applications

The permanent magnet motor is designed for use with our PowerSave pumps. These energy-efficient ESPs reduce system length and weight, and feature a smaller outside diameter (OD) than competing systems. This makes them ideal for horizontal wells and wells with high dogleg severity. Common applications include:

  • ESPs for conventional and unconventional wells
  • Wide range of flows and pressures
  • Downhole-driven ESPCPs
  • Geothermal pumping systems

The PMM is available in multiple sizes, from as small as a 2.17-in. (55-mm) outside diameter (OD) to a 7.44-in. (188-mm) OD. We offer the smallest PMM available on the market, making it particularly advantageous in slimline ESP [link this anchor text to the Slimline ESP page] applications and for use with our cable-deployed rigless ESP [link this anchor text to the Colibri rigless ESP page].  

Need more info?

Contact us for more information about reducing your ESP power bill and improving ESP performance with our PMM