AC / DC Drives

EEC is a leading supplier of AC / DC Drives. We stock an extensive range of drives together with a range of ancillary products. We are able to support obsolete drives as we stock a broad range of spare parts and refurbished drives.
We supply medium voltage variable speed drives for a wide range of applications in the cement, mining and minerals; power; water; metals; marine and chemical, oil and gas industries. They are used to adapt the motor speed to the actual need, thus optimizing energy consumption. Our product portfolio also includes state-of-the-art DC drives which gives you design flexibility and the proven dependable performance. EEC assists its customers in improving productivity and reducing energy consumption with a comprehensive, range of AC drives and drive systems. Our offering of AC drive products are sold with solutions from simple speed control to complex coordinated process control. .
AC Drives
An AC Drive is an electronic device that converts a fixed frequency and voltage to an adjustable frequency and AC voltage source. It controls the speed, torque, horsepower and direction of an AC motor. AC Drive is also a term used for an AC inverter and is sometimes used to describe a particular section of an AC drive. The section uses the DC voltage from a previous circuit stage (DC Bus) to produce an AC current or voltage having the desired frequency.
AC Drives are also referred to as Variable Frequency Drives (VFD's) or Adjustable Speed Drives (ASD's). These drives are gaining in popularity due to the energy savings that can be obtained related to the AC technology. In addition, AC motors are simpler than DC and usually an "off-the-shelf" item compared to DC motors. Advances in technology have made the size, cost, reliability and performance of AC drives very appealing in industrial variable speed applications.
Today the variable-frequency drive is perhaps the most common type of output or load for a control system. As applications become more complex, the frequency drive has the ability to control the speed of the motor, the direction the motor shaft is turning, the torque the motor provides to a load and any other motor parameter that can be sensed. Newer drives have a variety of parameters that can be controlled by numbers programmed into it or downloaded from another microprocessor-controlled system such as a programmable controller (PLC).
DC Drives
Despite the popularity of AC drives, DC drives have favorable characteristics that prove to be appropriate for many applications. The characteristics of a DC Drive include: speed changes that are made by increasing or decreasing the amount of DC voltage fed to the motor from the drive, low cost for medium and high HP applications, wide speed range and good speed regulation. DC drives can also be very compact in size.
Dc Drives are Best Used in Applications Where :

• The DC motor exists in a reasonably clean and dry environment, and the use of DPG, DPG-FV, TENV, or TEFC motor enclosures is required.
• The application requires a wide range of changing loads.
• Motor speeds can reach 2500 RPM
• Starting torque is greater than 150% or unpredictable.
• Application HP requirements are medium to large.

Not all our products are shown here so if you have a specific requirement, please do contact us and we will assure you of our personal attention to your needs. This is our specialty, we don’t just present our customers with a list of products and leave them to it, we guide you step by step.
Our Ac-dc Portfolio Includes World Class Brands and Models like :

ABB

•  ACS55 -[0.25-3 HP] (0.18-2.2 kW)
•  ACS150 -[0.5-5 HP] (0.37-4 kW)
•  ACS250 -[0.5-20 HP] (0.37-15 kW)
•  ACS355 -[0.37 to 22 kW] (0.5 to 30 HP)
•  ACS850-04 -[0.37 to 560 kW] (0.5 to 700 HP)
•  ACS310 -[0.37-22 kW] (0.5-30 HP)
•  ACS550-01 wall-mounted units -[0.75-160 kW] (0.5-200 HP)
•  ACS550-02 free-standing units -[160-355 kW] (250-500 HP)
•  ACS550-U1-[0.75-150 HP] (240-600V)
•  ACS800 single drives -[0.55 to 5600 kW]
•  ACS800 multidrives-[1.5 to 5600 kW]
•  ACS800 drive modules-[1.1 to 4000 kW]
•  DCS 800
•  DCS 550

GE

• AF-650 GP* General Purpose Drives
• AF-60 LP* Micro Drives
• V-300 Standard Drive

Schneider

• Altivar 61
• Altivar 71

Siemens

• SINAMICS V90
• SIMOTICS S-1FL6
• G110
• G120
• G130
• M410
• M420
• M430
• M440
• SIMOREG DC Master
• SINAMICS DCM
• SIMOREG CM

Not all our products are shown here so if you have a specific requirement, please do contact us and we will assure you of our personal attention to your needs. This is our specialty, we don’t just present our customers with a list of products and leave them to it, we guide you step by step.

Parker Hannifin

• Parker 650 Inverter Series
• Parker 690 Inverter Series
• Parker AC30V Inverter Series
• Parker 890 Inverter Series
• Parker 512C / 514C Series
• Parker 590 Integrator Series

Rockwell / Allen Bradley

• Power Flex 4
• Power Flex 40
• Power Flex 400
• Power Flex 70
• Power Flex 700
• Power Flex 7000
• 20P Power Flex DC

Delta

• VFD L   
• VFD M   
• VFD EL  
• VFD B  
• VFD VE

Yaskawa

• A1000
• V1000
• V1000-4X  
• J1000
• F7
• G5
• G7

Danfoss

• VLT Micro
• VLT 2800
• VLT-5000
• VLT-6000
• FC300
• FC 301
• FC 302

Most of the common models are generally readily available with us.