Overview
The Minarik RG500UA is a full-wave, four-quadrant regenerative SCR drive engineered for precise DC motor speed control in industrial automation, material handling, and motion control applications. Unlike standard PWM drives, regenerative SCR technology allows overhauling loads to return energy to the AC line, extending battery life in mobile and portable equipment. With dual-voltage input switching and smooth variable-speed operation, the RG500UA handles single or bi-directional control of brush-type DC motors from 1/8 to 2 HP.
Key Features
- Full-wave four-quadrant regenerative operation for smooth motoring and braking
- Contactorless reversing on-the-fly without external relays or contactors
- Dual input voltage selection: 115 or 230 VAC via slide switches
- Motor output: 0–90 VDC or 0–180 VDC (switchable)
- 12 A continuous output (10 A armature current rated)
- 1% speed regulation over 50:1 range; 0.1% with tachometer feedback
- Rapid deceleration and regenerative braking to zero speed
- Integral protection and speed adjust potentiometer
Technical Specifications
- Input Voltage: 115 or 230 VAC (selectable via switches SW501/SW502)
- Output Voltage: 0–90 VDC or 0–180 VDC (switchable)
- Output Current: 12 A continuous; 10 A armature
- Motor Power Rating: 1/8 to 2 HP brush-type DC
- Control Type: Full-wave, four-quadrant regenerative SCR
- Speed Regulation: 1% over 50:1 speed range
- Operation Modes: Single or bi-directional variable speed, regenerative deceleration, inhibit braking
- Weight: 2.15 lbs (chassis configuration)
- Heat Sink Requirement: External heat sink (part 223-0235) required if continuous armature current exceeds 7 A
- Series: RG500
Typical Applications
The RG500UA excels in applications requiring:
- Overhauling loads that need regenerative braking and smooth deceleration
- High duty cycle reversing and rapid forward-reverse cycles without mechanical contactors
- Portable or battery-powered equipment where energy recovery extends run time
- Positioning, hoisting, and material transport where precise speed and torque control is critical
- Industrial test stands, presses, and machinery with variable load profiles
Compatibility & Replacements
Compatible With
- Standard brush-type DC motors 1/8–2 HP
- Shunt-wound DC motors with optional field supply
- Tachometer feedback modules for enhanced speed stability
- External limit-switch logic boards (Minarik part 200-0386A)
- Standard AC mains 115 or 230 VAC single-phase power
Replaces / Drop-In Replacement For
- Older Minarik RG500-series open-chassis regenerative drives
- Generic four-quadrant SCR DC controls for similar horsepower ratings
- Verify compatibility with your system integrator before ordering.
Works With
- Minarik DLC600 digital speed controller (PCM option)
- Burr Brown isolated signal conditioning (PCM configuration)
- Regenerative deceleration and inhibit control logic
- Standard potentiometer-based speed adjustment and acceleration ramp control
