Variable Speed Drives

Precise, reliable surface control of Induction or Permanent Magnet Motors

Levare variable speed drives (VSD) provide precision control and maximum protection of both induction and permanent magnet motors (PMM). Engineered with ESP and PCP applications in mind – Levare VSDs incorporate an array of advanced functions and control software algorithms plus data integration and remote communication interface capabilities


Control of induction or permanent magnet motors (PMMs) used with

  • Electric submersible pumps (ESP)
  • Electric submersible progressing cavity pumps (PCP)
  • Horizontal pumping systems (HPS)

Data acquisition and integration

Interface to remote SCADA

Special Application Software Algorithms

Gas Lock Ride Thru

The Gas Lock Ride Thru function works to break or eliminate gas-lock conditions. When enabled and specific conditions of underload are detected, this application steps the drive through multiple predetermined speed levels until gas-locking conditions are overcome.

Current Limit

When in Clamp Mode, the Current Limit function acts to reduce motor frequency when motor current during operation exceeds a predetermined upper threshold. While in Target Mode, it acts as a PID regulator that can increase and decrease the frequency to maintain a desirable motor current level.

Pump Unfreeze Function

The Pump Unfreeze applications enable operator control to free a stuck downhole pump system by means of either controlled reversal of direction (JOG mode) or controlled application of variable torque level (TORQUE mode).

The Axiom II VSD controls IMs and PMMs with maximum efficiency and reliability. The drive utilizes a proprietary vector control algorithm to achieve maximum efficiency using Levare PMMs. With a built-in filter, the Axiom II delivers a near sinusoidal output waveform to downhole equipment. The Axiom II VSD, is available in NEMA 3R or NEMA 4 enclosures, in6, 12, 18, and 24 pulse input configurations and in size ratings from 112 Amps to 1,100 Amps


Superior reliability reduces drive downtime

A wider range of lift system options using a single drive

Optimized motor efficiency with vector control for PMMs reduces OPEX


Open loop vector control of PMMs
Scalar control of induction motors (IMs)
Touch-safe components
Advanced human machine interface (AHMI)
Data integration and communications interface
DriveWorksEZ® custom programming software
Input voltage
480 V -25% / +10%
380 V -15% / +15%
Full power range
93 – 914 kVA at 480 V
73 – 723 kVA at 380 V
Input frequency 47 – 63 Hz
Output frequency 10 – 240 Hz (0.1 Hz resolution)
Inverter output PWM
Output distortion <5% after PWM filter
Intermittent overload 150% for 1 minute
Temperature Operational -40°C to 55°C air temperature
Altitude Full rating to 1,000 meters
Noise <75 db at 1 meter
Humidity To 100% as all units have heaters
SCADA/ I/O built in
i.e., more options available
with additional cards
  • RS485 (115 kbps) MODBUS Slave SCADA interface for monitoring and control
  • 5 digital inputs (24 V DC)
  • 3 analog inputs (0-10 V DC / 4-20 mA)
  • 1 fault relay (Form C)
  • 3 relay outputs (Form A)
  • 2 analog outputs (0-10 V DC / 4-20 mA)
Fault and event logging Incorporated in the UHMI and can be downloaded through a USB port
Specifically designed and built for oilfield applications, the Intellek™ VSD comes with an integral output sine wave filter (SWF) and incorporates the latest surface controller technology, the Levare UHMI. Integrating external surface and/or downhole sensor measurements, programmable control and protection software functions enable intelligent ESP, PMM-PCP and well operations. Standard Intellek™ VSDs are equipped with a NEMA4 rated enclosure and are well suited to protect against the demanding environmental conditions experienced in many operating locations.


Increased system run life

Optimized system performance

Increased well production


Multiple motor start modes (soft, jog, rock, current)
Automatic, manual and programmable operating modes
Protective alarms and shutdown
Superior personnel safety
Compatible with most downhole sensors
User-friendly UHMI interface
Different configurations to fit most end user requirements
Input Voltage
(+ range deviation from nominal)
480 V AC (60 Hz) -25% / + 25%
380 V AC (50 Hz) -25% / + 25%
Current Rating, A 160 250 400 630 1,000 1,200 1,600
Output Power, kVA @ 480 V 132 208 332 520 830 998 1,130
Input Frequency 47 – 63 Hz
Min. efficiency 95%
Inverter Output Filtered PWM
Output distortion 5% with built-in output sinewave filter
Intermittent Overload 125% for 300 sec
Ambient Temperature -10°C to 55°C
Degree of Protection NEMA3R / NEMA 4
Drive Controller UHMI
Output Frequency / Speed Range
IM 2 – 75 Hz
PMM 120 – 7,200 rpm