LEESON® Speedmaster™ DC Adjustable Speed Drives
SCR Thyristor Controls
General Specifications
PWM and SCR Controls
- General purpose for permanent magnet or shunt wound DC motors
- NEMA® 4X and 4/12 suitable for washdown applications
- Dual voltage capable on most designs – see HP range
- 115 / 230-volt single-phase input voltage – DC 90 volt or 180-volt output
- Adjustable minimum and maximum speed
- Speed pot included on chassis controls
- Adjustable IR compensation
- Heat sinks required as noted
- PWM controls provide quieter operation, lower motor temperature and greater motor overload capacity
Regenerative Controls
- Four quadrant controls for precise motion control
- NEMA 4X or chassis style
- Motoring and braking torque regulation ¼ HP through 2 HP
For NEMA Frame Motors & Gearmotors SCR Controls - Enclosed - Single Phase Input 50/60 Hz
 |
|
| Description | Catalog Number |
|---|---|
| NEMA 1 General Purpose | |
| Non-Reversing | 174307.00 |
| Non-Reversing with dynamic braking | 174308.00 |
| Non-ReversingHeat Sink ∆ | 174316.00 |
 |
|
| NEMA 4X Washdown – Dust-Tight | |
| Non-Reversing, Plastic Enclosure | 174102.00 |
| Non-Reversing, Plastic Enclosure with Signal Follower | 174103.00 |
| Reversing, Plastic Enclosure | 174107.00 |
 |
|
| NEMA 4 | |
| Non-Reversing 3HP | 174709.00 |
Subfractional HP Motors & Gearmotors NEMA 1 General Purpose PWM Controls - Enclosed - Single Phase Input 50/60 Hz
 |
|
| Description | Catalog Number |
|---|---|
| SCR Non-Reversing | M1740005.00 |
| SCR Reversing With Dynamic Braking | M1740006.00 |
| PWM Non-Reversing | M1740008.00 |
PWM and SCR Controls Open Chassis
 |
|
| Description | Catalog Number |
|---|---|
| Open Chassis SCR Type | |
| Chassis with Speed Pot Non-Reversing | M1740007.00 |
| Open Chassis PWM Type | |
| Chassis with Speed Pot Non-Reversing | M1740009.00 |