DC Variable Speed Drive Systems
FOR LAND & OFFSHORE DRILLING, PRODUCTION AND MARINE INDUSTRY

Digital Drives

M&I’s Digital DC Drives utilize proven technology and components such as Wago or Siemens PLC controllers. These systems are easily adaptable to communicate with a local network or Ethernet. The bridge is easily accessible from the front for maintenance and all high voltage components are protected by safety barriers.

Digital Drives
• Advanced microprocessor technology
• Programmable regulator, PLC
• Connectability to various operator
interfaces including touch screen
• Full four quadrant SCR bridge
M&I provides analog SCR drive systems and replacement
parts for land and offshore rigs. These systems
and components are a direct replacement for analog
systems built over the past 20 years.
Analog Drives
• Complete analog SCR systems utilizing proven technology
• Designed to meet IEEE, ABS, SOLA & DNV
• Drawout circuit breaker available
• Series or shunt type systems available
• Front access up to 1600 amps
• Available with power & control building for land rigs
• Regenerative braking
• Electronic armature reversing
• Automatic field weakening

Analog Drives

M&I provides analog SCR drive systems and replacement parts for land and offshore rigs. These systems and components are a direct replacement for analog
systems built over the past 20 years.

Analog Drives
• Complete analog SCR systems utilizing proven technology
• Designed to meet IEEE, ABS, SOLA & DNV
• Drawout circuit breaker available
• Series or shunt type systems available
• Front access up to 1600 amps
• Available with power & control building for land rigs