TWERD Drives

Twerd-LogoNEWEND-02-white

TWERD Energo-Plus Drives

For Oilfield Applications and General Purposes

TWERD ENERGO-PLUS Drives for Artificial Lifting Solutions in the Oil & Gas and Industrial Sectors.

Control Cabinet and Digital Instruments for a Frequency Converter Test Bench
TWERD Factory's Facilities and Assembly Shop for Control Panels and Variable Frequency Drives
Official TWERD ENERGO-PLUS logo featuring an electronic circuit isotype

TWERD Frequency Converters

  • Solutions tailored to the required level of harmonic filtering: 6, 12, 18, or 24 pulses; Regen AFE "Active Front End"
  • Cabinet adapted to the specific constraints of the site
  • IP20 to IP55 protection.
  • "Indoor" or "outdoor" installation
  • Power ratings from 60 to 1,200 HP
  • BCP, BES, or Mechanical Pumping Application.
  • Easy to transport.
  • A solution with energy recovery that allows energy to be fed back into the grid.
  • No braking resistance is required.
  • It guarantees a THD lower than that of a conventional six-pulse solution and independent of the load
  • Dual Application, BCP / Rocker Arm
TWERD brand industrial variable frequency drive, model MFC1000, for controlling medium- and low-voltage motors
Block diagram and schematic diagram of a frequency converter with an active rectifier (Active Front End)

MFC1000 AcR Active Front End

Regenerative Active Front End (AFE) technology, which involves replacing the traditional uncontrolled diode-based rectifier with a fully controlled rectifier based on state-of-the-art IGBTs, which are managed using vector control algorithms that allow for precise control of the power flow and, in turn, provide robust motor operation in the face of grid disturbances.

THDi minus 5%

The most efficient solution for harmonic reduction at

  • Compliance with the IEEE 519 standard
  • Active Front technology for significant harmonic reduction, optimizing installation costs and saving space during integration
  • Power factor of one, thereby eliminating the need for capacitor banks and multipulse transformers
  • Resistant to line voltage fluctuations
  • DC bus voltage that can be controlled and stabilized at the desired level
  • Sine-wave input current

Benefits of Using AFE Drives

  • THDi<5% sin necesidad de filtros armónicos.
  • Reactive power control algorithm that maintains a power factor of one.
  • DC bus voltage control algorithm, which ensures the stability of the voltage supplied to the motor even when voltage drops occur in the power supply network.
  • DC bus voltage control algorithm, which ensures the stability of the voltage supplied to the motor even when voltage drops occur in the power supply network.
  • A compact and modular solution, ideal for packaged solutions such as Power House, that also optimizes integration costs in outdoor enclosures by reducing space, components, and integration time.
  • Bidirectional power flow, which allows energy to be fed back into the grid when the application requires it, without the need for braking resistors.

Comparison of AFE VFD vs. 6-Pulse VFD with Diode

AFE TECHNOLOGYRECT DIODE TECHNOLOGY
Regeneration
THDi minus 5% 70–80% (without filter)
Bus Voltage Control
Requires the use of braking resistors
Power factor10.955

MFC1000
for Progressive Cavity Pumping (BCP)

Rotary Head System for Progressive Cavity Pumping (BCP) in an Oil Well with a TWERD Frequency Converter
  • PCP Parameter Configuration and Monitoring
  • Torque Protectors
  • Backspin Control with and without Power

MFC1000
for Mechanical Pumping (BM)

Automated mechanical rocker-type pumping unit for oil wells with a TWERD variable-frequency drive
  • Configuration and Monitoring of RD Parameters
  • 4-Quadrant Operation
  • Production Optimization
  • Regenerative (Does not require braking resistors)

MFC1000
for Submersible Electric Pumps (BES)

  • Configuration and Monitoring of ESP Parameters
  • Backspin Control
  • Pump Protections
Industrial control panel with a TWERD variable-frequency drive installed next to a BCP wellhead in an oil well

Key Features

  • Vector Control Algorithm for High-Precision Torque and Speed Control
  • Alta reducción de armónicos (THDi < 5%)
  • Power factor of 1
  • Bidirectional energy flow
  • Managing Micro-Power Outages
  • Built-in protections
  • Intelligent torque control in the pump
  • Speed Control Using Background and Surface Variables
  • Backspin Control
  • Monitoring of Operating Variables
  • Automatic Restart
  • Dual-Motor Application

MFC1000 AcR
Firmware for Progressive Cavity Pumping (BCP)

The MFC1000/AcR variable-speed drive is a converter featuring Active Front End (AFE) technology, which provides excellent performance in terms of reducing harmonics fed into the grid, while maintaining a power factor of one and enabling operation in all four quadrants.

It uses vector-modulated torque control as its core technology to meet the requirements for high starting torque, speed accuracy, and torque control. 

Suitable for a wide variety of applications, this product offers PID control, a user-friendly interface, flexible I/O expansion, fieldbus communication modules, comprehensive protection, resistance to harsh environmental conditions, and easy maintenance.

It features BCP software specifically designed to meet the mechanical and electrical requirements of the oil industry, ensuring greater reliability: a reduction in lost barrels due to micro-power outages.

Timely restoration of production through the Backspin control options and automatic restart.

Optimization of production and reduced energy consumption.

Significant improvement in power quality: Low-harmonic equipment with a power factor of one, which does not introduce distortion into the grid, ensuring the most optimal use of the electrical system.

 

MFC1000 BCP General Diagram

Modbus Control and Communication Architecture Diagram for TWERD Drives in PCP Applications
HMI-converted-to-267x300
hm5
Screenshot 2025-11-07 090308
hmi2
hm3
hm8
hm4
hmi9
hmi6
hm7

HMI for BCP Applications

Graphical touchscreen display with software specifically designed to provide maximum reliability and control in artificial lift systems using progressive cavity pumps (PCP), capable of operating without external connections to bottom-hole, surface, and pump sensors. Complete integrated solution with no need for external PLCs.

The oilfield HMI, designed specifically for BCP pumps, is a key tool that facilitates quick and user-friendly configuration of the TWERD variable-speed drive. Its interface is tailored to the language of field operators, ensuring more precise VFD programming. In addition, it enables a rapid response to potential failures, reducing downtime and optimizing production

 

BCP progressive cavity pump rotary head installed at an oil field, controlled by a Twerd variable-speed drive.

Benefits of Using an Oil Industry HMI

This HMI not only simplifies the configuration and operation of the drive, but also improves safety, reduces downtime, and increases production efficiency in oilfield applications using BCP pumps.

  • Reduced downtime thanks to diagnostics and rapid response to failures.
  • Greater precision in VFD configuration, tailored to the operator's language.
  • Optimizing production by keeping the pump in safe and efficient operating condition.
  • Easy to use and learn thanks to its intuitive interface and clear menus.
  • Improved predictive maintenance through historical records and data loggers.

Technical Specifications for the MFC 1000 AcR for PCP Artificial Lifting

Home

Power
150 HP
Voltage
3-phase AC 380V–480V (-15%–+10%)
Input Frequency
60 Hz ±5%
Rectifier Technology
IGBT Active Front End
Rectifier Switching Frequency
2.5 kHz
DPF displacement factor = Cos phi
cos1 (fundamental)
Network Micro-Outages
500 ms
Current THD
<5%
Inlet Filter
Built-in LCL
Dials
Yes (4-quadrant operation)
Departure
Output Frequency
0.0...400 Hz U/f operating mode
0.0120 Hz - Vector operation mode
Output Current
180 A
Output Voltage
0 to One
Efficiency
98% at rated load
Control System
Control Method
Linear and Quadratic U/f Scaling
Sensorless Vector DTC-SVM
DTC-SVM Vector Control with Rotor Position Sensor
Switching Frequency
1 to 8 kHz
Modulator
SVPWM
Speed Reference Type
Analog Inputs
Control Panel
Potentiometer
PID Controller
 RS232 or RS485 communication bus
Other possibilities.
Overload Capacity

Instantaneous overload torque, 0–60 Hz, 60 seconds
150%
Start-up Torque (Between 0 and 0.5 Hz) 3 seconds
200%
Environmental Conditions


Operating ambient temperature
-10°C to +50°C
Storage Ambient Temperature
-25 Ca +55°C
Humidity
5% to 95%
Elevation
1,000 meters above sea level
Protections

Engine Protection
Locked rotor
Engine Overload (internal combustion engine), 
Output Current Limitation
Current imbalance
Voltage imbalance
Motor Overtemperature (PT100, PTC)
Speed Limit
Torque Limitation
Speed discrepancy
Ground fault
Drive Protections
IGBT Overload,
Phase loss
Low input voltage
High input voltage 
DC Bus Voltage Upper Limit, 
Low-Voltage DC Bus 
 IGBT Temperature 
 LCL Filter Overtemperature
 Power Supply Failure
 Ground fault
Loss of analog input signal 
Loss of speed reference
Emergency Stop
Hardware



Digital Tickets
10 digital inputs: Di1...DI10
 Digital Outputs 0/(15...24) V, RIN ≥ 3 kΩ 2. 
The ability to add up to 30 digital inputs using expansion cards.

Digital Outputs
6 digital relay outputs K1... K6 - breaking capacity: 250 V/1 A AC, 24 V/1 A DC. .
The ability to provide up to 11 digital outputs on expansion cards.

Analog Inputs
5 A10 analog inputs: 
5 analog inputs AI0: voltage mode 0(2)... 10 V, Rin ≥ 200 k
Al1, A12, A13, A14: voltage mode 0(2)... 10 V, Rin ≥ 100 kΩ;
 current mode 0(4)...20 mA, Rin = 250
Analog Outputs
2 analog outputs, A01 and A02:
Voltage mode 0(2)...10 V
Current mode 0(4)...20 mA
Communication

Standard port
USB port
2 RS485 ports
Ethernet
Standard Protocols
Modbus-RTU
Ethernet (Modbus TCP)
Control Panel


Type
Removable
Length
Up to 10 meters (optional)
Display LEDs
RUN LED. Engine running
LED FAULT: A fault or alarm has occurred
LED READY: Waiting for the order to proceed

LCD Display
LCD Screen
Keypad with 10 keys for controlling and configuring the drive, start, stop, and reset; parameter backup
 Shutdown and Reset, Parameter Backup
Application



Oil and Gas Application
Applications of Progressive Cavity Pumps (PCP)
Operating autonomy without power at maximum load
If there is an interruption in the supply voltage, the drive continues to operate using the kinetic energy of the rotating motor by internally switching the control mode from speed control to zero torque, thereby maximizing the runtime of the
equipment’s runtime without power for up to 500 ms
Backspin Control
Yes (during normal shutdown and when power is off)

Data Logger
Memory storage capacity for up to 20 operational variables, at an adjustable sampling frequency in seconds, for a period of 3 months. Event logging with time and date using
an RTC (real-time clock). Data download via USB port 1)
BCP Application Software
Torque Control and Protection for the Pins (Adjustable Regulation Torque and Trigger Torque)2) Software with speed and torque control via signals (suction and discharge pressure, suction and
Discharge via 4-20 mA signals) 3) Speed control via surface signals
(head pressures: tubing and annulus, head temperature
4) Control of drill rod braking during reverse rotation (back spin)

Operations Functions




Number of attempts and restart times
Up to 6 user-programmable restarts and time adjustment using the "Total retry time" and "Delay time" parameters. Selection offailures to be reset using the automatic reset function

Programmable acceleration time

0 to 600 sec (programmable) via internal VFD; up to 6,000 sec (programmable) via HMI application

Programmable deceleration time
600 sec Programmable Intermo VFD, 0 to 6,000 sec Programmable with HMI application
Start-up Type
Kampa Linear and S-Type Acceleration Ramps. Acceleration ramp for programmable flackspin control, independent of the one used in standard operation.
Type of Loading Torque
Constant to Variable 
Stop Type
 Linear and S-type deceleration ramps. Independent ramp
Configurable for emergency situations, user-programmable backup management function
user-programmable. Braking via continuous fuel injection using the DC Hald function. Braking via flow

Special Features
Internal PLC
Ability to control an external process without the need for an external PLC; 48 universal function blocks; 43 functions: simple logic and arithmetic; 8-state sequencer block; 2 multiplexers with 8 inputs.

PID Controller
Selection of reference signal source and feedback signal source; ability to reverse the polarity of the error control signals; sleep function; output value limiting.

Additional Panel Features
Definition of user settings for direct observation of processes, selection of units of measurement, scale, and data source. LCD contrast adjustment
Regulations
Product Compliance
IEC/EN 50178:2003
IEC/EN 61800-5-1:2007 +
IEC/EN 61800-3:2008
ISO9001
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